+publisher:"University of Michigan" +contributor:("Burch, John B.")

University of Michigan

1. Ladin, Loren Guerrero. Population genetics and local adaptation in a cyclically parthenogenetic aquatic invertebrate: An examination of the population response of Daphnia pulex to contamination by de-icing road salt.

Degree: PhD, Limnology, 2006, University of Michigan

URL: http://hdl.handle.net/2027.42/125587

► The population genetics of Daphnia pulex from First and Second Sister Lakes was qualified. The lakes differed greatly in the amount of de-icing salt contamination,… (more)

▼ The population genetics of Daphnia pulex from First and Second Sister Lakes was qualified. The lakes differed greatly in the amount of de-icing salt contamination, as was measured by conductivity. First Sister Lake had measurements that were consistently over twice as high as those of Second Sister Lake. These lakes are contiguous for part of the year via a marshy area. Allozyme electrophoresis was used to track the frequencies of genotypes during the summer months for two years. As expected, the greatest genetic diversity in both populations occurred at the time of ephippial (sexually produced) egg hatching in the spring. Generally, there was a decline in diversity over the summer, as expected with clonal growth and selection. The intrinsic rate of growth was estimated with data from chronic bioassays using dilutions of road salt and selected clones from both lakes. Standard quantitative genetics was used to determine the components of variance for each clone using the growth rate estimates. The environmental component of variance dominated the chronic response. There was a highly significant component of interaction (genotype x environment) indicating open evolutionary options for the populations with respect to road salt contamination. Genotype components of variance were insignificant for most clones, leading to the conclusion that most of the genotypes tested were ecological equivalents with respect to tolerance to road salt contamination. One exception was a clone present in large numbers in First Sister Lake at the end of summer (as a result of clonal selection). This clone was narrowly adapted to high concentrations of road salt. This is a case of the generation and maintenance of genetic variance in the wild, since this clone is unlikely to persist in lakes not experiencing road salt contamination. Population genetic divergence between the two lakes was significantly greater than expected. It is concluded that genotype-environment interactions play a key role in determining the chronic responses and adaptation of Daphnia pulex to de-icing road salt contamination in these two lakes. Advisors/Committee Members: Burch, John B. (advisor).

Subjects/Keywords: Adaptation; Aquatic Invertebrate; Contamination; Cyclically; Daphnia Pulex; De; Examination; Genetics; Icing; Local; Parthenogenetic; Population; Response; Road Salt

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APA (6^th Edition):

Ladin, L. G. (2006). Population genetics and local adaptation in a cyclically parthenogenetic aquatic invertebrate: An examination of the population response of Daphnia pulex to contamination by de-icing road salt. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/125587

Chicago Manual of Style (16^th Edition):

Ladin, Loren Guerrero. “Population genetics and local adaptation in a cyclically parthenogenetic aquatic invertebrate: An examination of the population response of Daphnia pulex to contamination by de-icing road salt.” 2006. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/125587.

MLA Handbook (7^th Edition):

Ladin, Loren Guerrero. “Population genetics and local adaptation in a cyclically parthenogenetic aquatic invertebrate: An examination of the population response of Daphnia pulex to contamination by de-icing road salt.” 2006. Web. 10 Apr 2021.

Vancouver:

Ladin LG. Population genetics and local adaptation in a cyclically parthenogenetic aquatic invertebrate: An examination of the population response of Daphnia pulex to contamination by de-icing road salt. [Internet] [Doctoral dissertation]. University of Michigan; 2006. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/125587.

Council of Science Editors:

Ladin LG. Population genetics and local adaptation in a cyclically parthenogenetic aquatic invertebrate: An examination of the population response of Daphnia pulex to contamination by de-icing road salt. [Doctoral Dissertation]. University of Michigan; 2006. Available from: http://hdl.handle.net/2027.42/125587

University of Michigan

2. Jung, Younghun. The Gyraulus subgenus Torquis (Mollusca:Gastropoda:Planorbidae) in North America.

Degree: PhD, Natural Resources, 1990, University of Michigan

URL: http://hdl.handle.net/2027.42/104504

► A conchological study shows that there are three valid nominal taxa in the Gyraulus subgenus Torquis: Gyraulus parvus, G. circumstriatus and G. huronensis. Gyraulus parvus… (more)

▼ A conchological study shows that there are three valid nominal taxa in the Gyraulus subgenus Torquis: Gyraulus parvus, G. circumstriatus and G. huronensis. Gyraulus parvus is the most common and widespread species, but G. circumstriatus is also widely distributed in North America. Gyraulus huronensis is limited to the northern Michigan shores of lakes Huron and Michigan. Diagnostic anatomical characters of the subgenus Torquis are the sigmoidly folded kidney with undulating margins, the prostate diverticula arranged in a single row, and the straight, uncoiled intestine. The anatomy of G. parvus and G. circumstriatus is very similar; G. huronensis differs in external pigmentation, in the direct connection of the prostate gland diverticula to the sperm duct, in the overall shape of the prostate gland, and in the number of prostate diverticula. The three species exhibit several differences in radular teeth. The chromosome numbers of Gyraulus parvus, G. circumstriatus and G. huronensis are n = 36, 2n = ca. 72. These are tetraploid numbers. The tetraploid condition was probably the result of one single event. Once the tetraploid condition was reached, the stability of this number has been maintained in each of the three species. The habitats of the three species are strikingly different; the three species do not compete with each other for the same resources. Such habitat differences between the three species help prevent gene flow between them. Allozyme analyses show that there is a genetic basis for the taxonomic separation of the three species of Torquis, i.e., the morphological differences are not due merely to ecological influences. The phenogram generated for the genetic identities by the UPGMA cluster analysis showed a close relationship between G. huronensis and G. parvus; G. circumstriatus is more distantly related. A phylogenetic analysis using PAUP places Gyraulus on a major planorbid evolutionary branch which includes Helisoma, Planorbella, Planorbula and Promenetus. Gyraulus constitutes a clade separate from the line leading to the latter four genera. Biomphalaria and Physastra are on a second major branch. An unexpected finding from the allozyme study was that the populations of Torquis are reproducing by automixis, not by panmixis as has been traditionally assumed. Advisors/Committee Members: Burch, John B. (advisor).

Subjects/Keywords: Biology, Anatomy; Biology, Genetics; Biology, Zoology

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APA (6^th Edition):

Jung, Y. (1990). The Gyraulus subgenus Torquis (Mollusca:Gastropoda:Planorbidae) in North America. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/104504

Chicago Manual of Style (16^th Edition):

Jung, Younghun. “The Gyraulus subgenus Torquis (Mollusca:Gastropoda:Planorbidae) in North America.” 1990. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/104504.

MLA Handbook (7^th Edition):

Jung, Younghun. “The Gyraulus subgenus Torquis (Mollusca:Gastropoda:Planorbidae) in North America.” 1990. Web. 10 Apr 2021.

Vancouver:

Jung Y. The Gyraulus subgenus Torquis (Mollusca:Gastropoda:Planorbidae) in North America. [Internet] [Doctoral dissertation]. University of Michigan; 1990. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/104504.

Council of Science Editors:

Jung Y. The Gyraulus subgenus Torquis (Mollusca:Gastropoda:Planorbidae) in North America. [Doctoral Dissertation]. University of Michigan; 1990. Available from: http://hdl.handle.net/2027.42/104504

University of Michigan

3. Lamb, Richard Vincent. Evolutionary implications of hemiphally in the land snail Zonitoides nitidus (Gastropoda: Stylommatophora: Zonitidae).

Degree: PhD, Biology, 1996, University of Michigan

URL: http://hdl.handle.net/2027.42/104974

► Zonitoides nitidus has been known to consist of mixed populations of euphallic and hemiphallic individuals since 1888 in England and 1928 in North America. English… (more)

▼ Zonitoides nitidus has been known to consist of mixed populations of euphallic and hemiphallic individuals since 1888 in England and 1928 in North America. English populations show high frequencies of euphallics in the fall and spring and high frequencies of hemiphallics during the summer, which is the breeding season. The high proportion of hemiphallics during the breeding season has lead researchers to speculate that it reproduces by self-fertilization. Zonitoides nitidus is also a predator on Fossaria truncatula, the intermediate host of sheep liver fluke, a characteristic which has attracted intense scrutiny to its natural history in Europe. The natural history data have not been interpreted in light of the possibility of the snail selfing. Neither have comparable data on its life history and effects of hemiphally during the breeding season been collected from North American populations. Zonitoides nitidus has one generation per year. Each generation is nearly non-overlapping, hatching between mid July and late August of one year and dying during July and August of the next. The hemiphallics mature before the euphallics, reaching the adult shell diameter of 5 mm as early as November. Euphallics mature during May and June, when they apparently grow much more quickly, becoming on average a full millimeter greater in diameter than the average hemiphallic by late June. During the breeding season, 12.25% of the adults are euphallic; the remaining 87.75% are hemiphallic. A comparison of the ratios of male investment, as measured by volumes of penis, epiphallus, and dart sac, over female investment, as measured by volumes of the albumen and oviduct glands, shows that euphallics invest approximately ten times as much into male function as do hemiphallics. It is inferred from these data that Zonitoides nitidus has a mixed breeding system of selfing and outcrossing. The hemiphallic snails are predicted to produce 89.9% of their offspring by selfing and to outcross as females with euphallics to fertilize the remaining 10.1%. The euphallic snails are predicted to reproduce entirely by outcrossing, apparently as both males and females with each other and as males with the hemiphallics. A review of selfing among mollusks indicates that selfing for reproductive assurance is the best-supported hypothesis to explain selfing within the phylum. However, Zonitoides nitidus lives at densities too high for this hypothesis to be likely. Hypotheses that may explain the likelihood of selfing are that it is an adaptation for long-distance dispersal, locally adapted offspring, or colonization of disturbed habitats. Advisors/Committee Members: Burch, John B. (advisor).

Subjects/Keywords: Biology, Anatomy; Biology, Ecology; Biology, Zoology

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APA (6^th Edition):

Lamb, R. V. (1996). Evolutionary implications of hemiphally in the land snail Zonitoides nitidus (Gastropoda: Stylommatophora: Zonitidae). (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/104974

Chicago Manual of Style (16^th Edition):

Lamb, Richard Vincent. “Evolutionary implications of hemiphally in the land snail Zonitoides nitidus (Gastropoda: Stylommatophora: Zonitidae).” 1996. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/104974.

MLA Handbook (7^th Edition):

Lamb, Richard Vincent. “Evolutionary implications of hemiphally in the land snail Zonitoides nitidus (Gastropoda: Stylommatophora: Zonitidae).” 1996. Web. 10 Apr 2021.

Vancouver:

Lamb RV. Evolutionary implications of hemiphally in the land snail Zonitoides nitidus (Gastropoda: Stylommatophora: Zonitidae). [Internet] [Doctoral dissertation]. University of Michigan; 1996. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/104974.

Council of Science Editors:

Lamb RV. Evolutionary implications of hemiphally in the land snail Zonitoides nitidus (Gastropoda: Stylommatophora: Zonitidae). [Doctoral Dissertation]. University of Michigan; 1996. Available from: http://hdl.handle.net/2027.42/104974

University of Michigan

4. Hoeh, Walter Randolph. The evolution and consequences of simultaneous hermaphroditism in the freshwater mussel genus Utterbackia (Bivalvia: Unionidae).

Degree: PhD, Biology, 1991, University of Michigan

URL: http://hdl.handle.net/2027.42/105703

► The rare occurrences of simultaneous hermaphroditism in the predominantly gonochoric freshwater mussels offer an opportunity for increased understanding of the ecological, genetic, historical, and morphological… (more)

▼ The rare occurrences of simultaneous hermaphroditism in the predominantly gonochoric freshwater mussels offer an opportunity for increased understanding of the ecological, genetic, historical, and morphological correlates involved in the origin and maintenance of hermaphroditism. The evolution of simultaneous hermaphroditism and breeding system variation was investigated in the freshwater mussel genus Anodonta. Comparisons of allozymes and morphology were used to generate a phylogenetic hypothesis for the species of Anodonta in eastern North America in order to determine the sister taxon of the simultaneous hermaphrodite, A. imbecillis. This analysis suggests the following relationships: (((((A. cataracta, A. gibbosa) (A. lacustris, A. grandis)) A. fragilis)(A. imbecillis, A. peggyae)) (A. cygnea (A. kennerlyi (A. implicata (A. "couperiana" (A. couperiana, A. suborbiculata)))))). From this hypothesis, Anodonta (s.l.) comprises three monophyletic groups of species each of which is herein recognized at the generic rank: Pyganodon cataracta, P. gibbosa, P. lacustris, P. grandis, P. fragilis; Utterbackia imbecillis, U. peggyae; Anodonta (s.s.) cygnea, A. kennerlyi, A. implicata, A. "couperiana", A. couperiana, A. suborbiculata. Allozyme analysis was used to estimate the phylogenetic relationships among 52 populations of U. imbecillis and U. peggyae. The resultant hypothesis (((U. imbecillis, U. sp.) U. peggyae)) suggests that U. peggyae (s.l.) is actually composed of two distinct lineages: U. peggyae (s.s.), from the panhandle of Florida and U. sp. from the Florida peninsula. Evidence is presented that is consonant with a hybrid origin for U. imbecillis. The uniformly hermaphroditic condition of U. imbecillis is consistent with the hypothesis of a transition from gonochorism to hermaphroditism soon after the origin of U. imbecillis. Low within-population levels of allozymic variation suggest that self-fertilization is common in U. imbecillis. However, the relative amount of self-fertilization may vary among populations. Among-population levels of allozymic variation were much higher than expected. This result may be due to relatively high levels of genetic drift in U. imbecillis brought about by relatively small effective population size. The relatively small effective population size is likely a consequence of (1) the inbreeding caused by high levels of self-fertilization and (2) the colonizing ability of U. imbecillis. Advisors/Committee Members: Burch, John B. (advisor).

Subjects/Keywords: Biology; Zoology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hoeh, W. R. (1991). The evolution and consequences of simultaneous hermaphroditism in the freshwater mussel genus Utterbackia (Bivalvia: Unionidae). (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/105703

Chicago Manual of Style (16^th Edition):

Hoeh, Walter Randolph. “The evolution and consequences of simultaneous hermaphroditism in the freshwater mussel genus Utterbackia (Bivalvia: Unionidae).” 1991. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/105703.

MLA Handbook (7^th Edition):

Hoeh, Walter Randolph. “The evolution and consequences of simultaneous hermaphroditism in the freshwater mussel genus Utterbackia (Bivalvia: Unionidae).” 1991. Web. 10 Apr 2021.

Vancouver:

Hoeh WR. The evolution and consequences of simultaneous hermaphroditism in the freshwater mussel genus Utterbackia (Bivalvia: Unionidae). [Internet] [Doctoral dissertation]. University of Michigan; 1991. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/105703.

Council of Science Editors:

Hoeh WR. The evolution and consequences of simultaneous hermaphroditism in the freshwater mussel genus Utterbackia (Bivalvia: Unionidae). [Doctoral Dissertation]. University of Michigan; 1991. Available from: http://hdl.handle.net/2027.42/105703

University of Michigan

5. Tso, I-Min. A test of the insect-attraction function of silk stabilimenta.

Degree: PhD, Zoology, 1996, University of Michigan

URL: http://hdl.handle.net/2027.42/129904

► Stabilimenta are the silk structures on webs of some orb-weaving spiders the function of which has provoked many arguments. I tested insect-attraction as one of… (more)

Subjects/Keywords: Argiope Aurantia; Argiope Trifasciata; Attraction; Function; Insect; Silk; Stabilimenta; Test

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tso, I. (1996). A test of the insect-attraction function of silk stabilimenta. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/129904

Chicago Manual of Style (16^th Edition):

Tso, I-Min. “A test of the insect-attraction function of silk stabilimenta.” 1996. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/129904.

MLA Handbook (7^th Edition):

Tso, I-Min. “A test of the insect-attraction function of silk stabilimenta.” 1996. Web. 10 Apr 2021.

Vancouver:

Tso I. A test of the insect-attraction function of silk stabilimenta. [Internet] [Doctoral dissertation]. University of Michigan; 1996. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/129904.

Council of Science Editors:

Tso I. A test of the insect-attraction function of silk stabilimenta. [Doctoral Dissertation]. University of Michigan; 1996. Available from: http://hdl.handle.net/2027.42/129904

6. Moore, Alexandria C. Taxonomic and Morphological Evaluation of an Endemic Freshwater Gastropod.

Degree: MS, Ecology and Evolutionary Biology, 2013, University of Michigan

URL: http://hdl.handle.net/2027.42/98979

► Mollusks are the second most diverse animal phylum in terms of number of described species and nonmarine mollusks are among the most imperiled groups of… (more)

▼ Mollusks are the second most diverse animal phylum in terms of number of described species and nonmarine mollusks are among the most imperiled groups of invertebrate taxa. In particular, freshwater and terrestrial mollusks have the highest number of documented extinctions of any major taxonomic group. Such extinctions are not without their consequences as nonmarine mollusks provide several ecosystem functions including regulation of rates of primary production, decomposition, water clarity, and nutrient cycling. Given this and the level of fluidity found within freshwater mollusk taxonomy, the proper identification of potentially endangered species is an issue of great concern. The present study evaluates the taxonomic status of a small freshwater snail endemic to southeastern Oregon within the Owyhee River, referred to here as the Owyhee physa. Molecular, morphological, and environmental analyses were employed using specimens from both a sister species, “Physa gyrina”, and another species with similar morphology and habitat conditions as the Owyhee physa, Physa zionis. Molecular analyses also incorporated supplemental sequences from other physid species to assess the status of the Owyhee physa within the Physidae family. Genetic analyses at the cytochrome oxidase 1 and ITS-1 and ITS-2 gene regions indicate that the Owyhee physa is a phylogenetically distinct species with “Physa gyrina” as its sister species. Using theoretical morphological techniques, the shell morphology of each of the three physid species was qualitatively described. Qualitative analyses of these morphological descriptions along with the phylogenetic tree and environmental data for each species suggests that convergent evolution played an important role in influencing shell morphology within this taxonomic group. The present work has provided additional information about the current status of Physidae species richness, but additional studies must be done to both broaden and deepen our knowledge of freshwater gastropod diversity. Advisors/Committee Members: Duda, Thomas F. (advisor), Burch, John B. (committee member), Dick, Christopher W. (committee member), Pappas, Janice L. (committee member).

Subjects/Keywords: Mollusks, Physa, Taxonomy, Conservation, Morphology, Evolution; Science - Conservation Genetics

…PhD student at the University of Michigan) produced an unpublished doctoral… …were sequenced through the University of Michigan DNA Sequencing Core using the original… …sequencing and supplied to the University of Michigan sequencing facility at one-micromolar… …the Family Physidae (Basommatophora: Pulmonata). PhD thesis, University of… …Michigan. Wethington, C. and Guralnick, R. 2004. Are population of physids from different hot…

4 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Moore, A. C. (2013). Taxonomic and Morphological Evaluation of an Endemic Freshwater Gastropod. (Masters Thesis). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/98979

Chicago Manual of Style (16^th Edition):

Moore, Alexandria C. “Taxonomic and Morphological Evaluation of an Endemic Freshwater Gastropod.” 2013. Masters Thesis, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/98979.

MLA Handbook (7^th Edition):

Moore, Alexandria C. “Taxonomic and Morphological Evaluation of an Endemic Freshwater Gastropod.” 2013. Web. 10 Apr 2021.

Vancouver:

Moore AC. Taxonomic and Morphological Evaluation of an Endemic Freshwater Gastropod. [Internet] [Masters thesis]. University of Michigan; 2013. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/98979.

Council of Science Editors:

Moore AC. Taxonomic and Morphological Evaluation of an Endemic Freshwater Gastropod. [Masters Thesis]. University of Michigan; 2013. Available from: http://hdl.handle.net/2027.42/98979

University of Michigan

7. Siripattrawan, Sirirat. Chromosomes, reproduction and genetic relationships of introduced Asiatic clams (Corbicula) in North America.

Degree: PhD, Zoology, 2001, University of Michigan

URL: http://hdl.handle.net/2027.42/128610

► Several different kinds of exotic bivalves have been introduced into North America during the twentieth century, including one or more species of the freshwater Asiatic… (more)

▼ Several different kinds of exotic bivalves have been introduced into North America during the twentieth century, including one or more species of the freshwater Asiatic clam, Corbicula. These prolific aquatic mollusks are important pests in freshwater habitats in North America, causing serious mechanical problems in industrial and domestic water systems. Further, these mollusks possibly may be significant factors in the extinction of some species of native North American freshwater mollusks. Although the exotic freshwater clam Corbicula has been the topic of considerable study in North America, its systematic status had remained unresolved. Opinion has been divided as to whether two species or only a single, highly variable species exist on the continent. Corbicula classification has been complicated by the pronounced variation in shell shape, sculpture and color which some of the species seem to exhibit, some of which may be ecophenotypic in origin. Specific mitochondrial genotypes of Corbicula Form A and Form B were discovered in North America that differed by 16 nucleotide substitutions and were respectively identical to haplotypes encountered in Japanese triploid androgenetic C. leana Prime, 1864, and to Korean triploid C. fluminea (Miller, 1774). A single-species model has been proposed for global freshwater members of this genus. However, it is now clear that Asian freshwater Corbicula lineages are developmentally and genetically heterogeneous. The two haplotypic identities of Asian/North American Corbicula are congruent with karyological results. Karyological studies of this research showed that both North American haplotypes (Form A and Form B) are triploid, with chromosome numbers 54 (3n = 54). Both forms are hermaphroditic and produce biflagellate sperm, as in ameiotic triploid Asian lineages (Japanese C. leana and Korean C. fluminea). Furthermore, since there is no evidence of meiotic divisions, the North American populations are likely to be androgenetic also. Advisors/Committee Members: Burch, John B. (advisor), O'Foighil, Diarmaid (advisor).

Subjects/Keywords: America; Asiatic Clams; Chromosomes; Corbicula; Genetic Relationships; Introduced; North; Reproduction

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APA (6^th Edition):

Siripattrawan, S. (2001). Chromosomes, reproduction and genetic relationships of introduced Asiatic clams (Corbicula) in North America. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/128610

Chicago Manual of Style (16^th Edition):

Siripattrawan, Sirirat. “Chromosomes, reproduction and genetic relationships of introduced Asiatic clams (Corbicula) in North America.” 2001. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/128610.

MLA Handbook (7^th Edition):

Siripattrawan, Sirirat. “Chromosomes, reproduction and genetic relationships of introduced Asiatic clams (Corbicula) in North America.” 2001. Web. 10 Apr 2021.

Vancouver:

Siripattrawan S. Chromosomes, reproduction and genetic relationships of introduced Asiatic clams (Corbicula) in North America. [Internet] [Doctoral dissertation]. University of Michigan; 2001. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/128610.

Council of Science Editors:

Siripattrawan S. Chromosomes, reproduction and genetic relationships of introduced Asiatic clams (Corbicula) in North America. [Doctoral Dissertation]. University of Michigan; 2001. Available from: http://hdl.handle.net/2027.42/128610

University of Michigan

8. Mulcrone, Renee Sherman. Incorporating habitat characteristics and fish hosts to predict freshwater mussel (Bivalvia: Unionidae) distributions in the Lake Erie drainage, southeastern Michigan.

Degree: PhD, Health and Environmental Sciences, 2004, University of Michigan

URL: http://hdl.handle.net/2027.42/124273

► Museum records and survey data were used at 52 sites across the Lake Erie drainage in southeastern Michigan to test the hypothesis that the presence… (more)

▼ Museum records and survey data were used at 52 sites across the Lake Erie drainage in southeastern Michigan to test the hypothesis that the presence of a mussel species is independent of the presence of its fish host. Two host specific mussels, Epioblasma triquetra and Lampsilis fasciola, were dependent of the distributions of their fish hosts, Percina caprodes and Micropterus dolomieu, respectively. Host generalists showed significant associations mainly with only one fish species. Mussel species richness was positively correlated when mussel subfamilies and fish families were considered. Mussel species richness within the subfamily Ambleminae and tribe Pleurobemini were correlated with the fish species richness in the family Ictaluridae. The tribe Lampsilini was positively correlated with the fish species richness in the Percidae and Centrarchidae families. To test the hypothesis that mussel densities do not increase with an increase in fish host densities, mussel and fish were quantified in 100 m sections at 24 sites in the Lake Erie drainage. Habitat characteristics were also recorded to test the hypothesis that mussels are independent of variations in habitat. Mussels increased with the increase in density and relative abundance of fish hosts, but results varied with mussel species. Epioblasma triquetra was positively correlated with P. caprodes . Three other host generalists, Lampsilis cardium, L. siliquoidea , and V. iris, were correlated with one or more of their fish hosts. Mussels were positively correlated with few habitat values. From the above results, predictive multilinear regression models were developed for nine mussel species (Elliptio dilatata, E. triquetra, Fusconaia flava, L. cardium, L. siliquoidea, L. fasciola, Ptychobranchus fasciolaris, Strophitus undulatus and Villosa iris) using both fish and habitat variables to predict mussel distributions. These models can be tested in other areas of the Lake Erie drainage (Ohio, Canada) or other drainages in Michigan. Because of the complex interactions between habitat, mussels, and host fish, future models should consider path analyses. Advisors/Committee Members: Burch, John B. (advisor), O'Foighil, Diarmaid (advisor).

Subjects/Keywords: Bivalvia; Characteristics; Distributions; Drainage; Fish Hosts; Freshwater Mussel; Habitat; Incorporating; Lake Erie; Michigan; Predict; Southeastern; Unionidae

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APA (6^th Edition):

Mulcrone, R. S. (2004). Incorporating habitat characteristics and fish hosts to predict freshwater mussel (Bivalvia: Unionidae) distributions in the Lake Erie drainage, southeastern Michigan. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/124273

Chicago Manual of Style (16^th Edition):

Mulcrone, Renee Sherman. “Incorporating habitat characteristics and fish hosts to predict freshwater mussel (Bivalvia: Unionidae) distributions in the Lake Erie drainage, southeastern Michigan.” 2004. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/124273.

MLA Handbook (7^th Edition):

Mulcrone, Renee Sherman. “Incorporating habitat characteristics and fish hosts to predict freshwater mussel (Bivalvia: Unionidae) distributions in the Lake Erie drainage, southeastern Michigan.” 2004. Web. 10 Apr 2021.

Vancouver:

Mulcrone RS. Incorporating habitat characteristics and fish hosts to predict freshwater mussel (Bivalvia: Unionidae) distributions in the Lake Erie drainage, southeastern Michigan. [Internet] [Doctoral dissertation]. University of Michigan; 2004. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/124273.

Council of Science Editors:

Mulcrone RS. Incorporating habitat characteristics and fish hosts to predict freshwater mussel (Bivalvia: Unionidae) distributions in the Lake Erie drainage, southeastern Michigan. [Doctoral Dissertation]. University of Michigan; 2004. Available from: http://hdl.handle.net/2027.42/124273

University of Michigan

9. Jantataeme, Siriwan. Some effects of the molluscicide bis(tri-n-butyltin) oxide (TBTO) on the snail Oncomelania quadrasi and the larval stages of its trematode parasite Schistosoma japonicum.

Degree: PhD, Zoology, 1991, University of Michigan

URL: http://hdl.handle.net/2027.42/128690

► The effects of sublethal concentrations (6 × 10^-5, 3 × 10^-4 and 1.2 × 10^-3 ppm) of the organotin molluscicide, bis (tri-n-butyltin) oxide (TBTO), on… (more)

▼ The effects of sublethal concentrations (6 × 10^-5, 3 × 10^-4 and 1.2 × 10^-3 ppm) of the organotin molluscicide, bis (tri-n-butyltin) oxide (TBTO), on the Philippine strain of the snail Oncomelania quadrasi and the larval stages of its trematode parasite, Schistosoma japonicum, were investigated. This study included the effects of TBTO alone and the effects of TBTO jointly with schistosoma infection on O. quadrasi. TBTO in a concentration of 1.2 × 10^-3 ppm reduced growth of Oncomelania quadrasi. TBTO concentrations of 6 × 10^-5 to 1.2 × 10^-3 ppm reduced the reproduction/fecundity of the snails. The number of offspring of O. quadrasi was inversely related to TBTO concentration and was reduced 41-55% from that of the control. Schistosoma japonicum infection increased the effect of TBTO on fecundity of the snails. Snails infected with five miracidia and treated with 6 × 10^-5 to 1.2 × 10^-3 ppm TBTO produced fewer offspring than uninfected treated snails, i.e., 41-90% reduction. TBTO or S. japonicum alone had little effect on the metabolic rate of O. quadrasi. However, metabolic rates did increase for infected snails treated with 3 × 10^-4 to 1.2 × 10^-3 ppm TBTO. Concentrations of 1.2 × 10^-3 ppm TBTO retarded the development of Schistosoma japonicum in the snail hosts, as shown by the reduced number of cercariae emerging from snails that were treated with TBTO the day following infection. TBTO at the lower concentrations (6 × 10^-5 and 3 × 10^-4 ppm) showed the greatest effect was on the late prepatent group (i.e., during the developing period of the cercariae in the snails). TBTO had some effect on the early prepatent groups (i.e., the developing period of the sporocysts in the snails), but had no effect on the patent groups (i.e., after completion of development of the cercariae in the snails). Thus, TBTO had a greater effect on the developing cercariae than on the developing sporocysts. Also, 6 × 10^-5 to 1.2 × 10^-3 ppm TBTO retarded development of S. japonicum in the snail hosts treated 15 days before infection. Therefore, TBTO at the lower, sublethal concentrations should be of value in controlling schistosomiasis by reducing both the number of target snails in specific localities and their schistosome parasite larvae. Advisors/Committee Members: Burch, John B. (advisor), Webb, Paul W. (advisor).

Subjects/Keywords: Bis; Butyltin; Effects; Japonicum; Larval; Molluscicide; Oncomelania; Oxide; Parasite; Quadrasi; Schistosoma; Snail; Some; Stages; Tbto; Trematode; Tri

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jantataeme, S. (1991). Some effects of the molluscicide bis(tri-n-butyltin) oxide (TBTO) on the snail Oncomelania quadrasi and the larval stages of its trematode parasite Schistosoma japonicum. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/128690

Chicago Manual of Style (16^th Edition):

Jantataeme, Siriwan. “Some effects of the molluscicide bis(tri-n-butyltin) oxide (TBTO) on the snail Oncomelania quadrasi and the larval stages of its trematode parasite Schistosoma japonicum.” 1991. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/128690.

MLA Handbook (7^th Edition):

Jantataeme, Siriwan. “Some effects of the molluscicide bis(tri-n-butyltin) oxide (TBTO) on the snail Oncomelania quadrasi and the larval stages of its trematode parasite Schistosoma japonicum.” 1991. Web. 10 Apr 2021.

Vancouver:

Jantataeme S. Some effects of the molluscicide bis(tri-n-butyltin) oxide (TBTO) on the snail Oncomelania quadrasi and the larval stages of its trematode parasite Schistosoma japonicum. [Internet] [Doctoral dissertation]. University of Michigan; 1991. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/128690.

Council of Science Editors:

Jantataeme S. Some effects of the molluscicide bis(tri-n-butyltin) oxide (TBTO) on the snail Oncomelania quadrasi and the larval stages of its trematode parasite Schistosoma japonicum. [Doctoral Dissertation]. University of Michigan; 1991. Available from: http://hdl.handle.net/2027.42/128690

University of Michigan

10. Lee, Taehwan. Systematic revision of the Sphaeriinae (Mollusca, Bivalvia, Veneroida, Sphaeriidae).

Degree: PhD, Zoology, 2001, University of Michigan

URL: http://hdl.handle.net/2027.42/132965

► The Sphaeriidae, commonly known as pea, pill, nut and fingernail clams, are prominent and ubiquitous members of freshwater ecosystems. Sphaeriid clams exhibit various peculiar biological… (more)

▼ The Sphaeriidae, commonly known as pea, pill, nut and fingernail clams, are prominent and ubiquitous members of freshwater ecosystems. Sphaeriid clams exhibit various peculiar biological features, including hermaphroditism, self-fertilization, ovoviviparity and pronounced polyploidy. Although this bivalve family has consistently attracted the attention of biologists, most previous discussions of sphaeriid evolution have generally lacked a rigorous phylogenetic perspective. This dissertation addresses this shortcoming by conducting evolutionary studies on the Sphaeriidae, focusing mainly on the subfamily Sphaeriinae, a major subgroup of the family. Chapter 1 reviews the current understanding of sphaeriid taxonomy, classification, reproductive/developmental characters and polyploidy. To demonstrate whether or not polyploidy is widespread in the Sphaeriinae, and, if so, to determine if polyploidy is related to asexuality, chromosomes of various North American taxa are cytogenetically investigated (Chapter 2 and 3). Well over 100 mitotic chromosomes are observed from all the species investigated and spermatogenetic meiosis is observed in octoploid Sphaerium striatinum. Polyploid North American members of sphaeriid genera are characterized for their expressed allelic repertoire of 6-Phosphogluconate-Dehydrogenase (PGD) in order to test hypotheses addressing the evolutionary origins of sphaeriid genome duplication (Chapter 3). Phylogenetic analyses of these PGD alleles suggest an ancient genome duplication event predating the divergence of some North American genera. Using morphological characters, Chapter 4 tests phylogenetic relationships among North American sphaeriid genera and, as a result, a sister-relationship between Musculium and Sphaerium taxa is supported. The current taxonomy of the Sphaeriinae is revised based on separate as well as combined phylogenetic analyses of three different gene sequence data, mitochondrial COI and 16S, and nuclear ITS1 (Chapter 5). Five monophyletic lineages, Afropisidium, Cyclocalyx, Odhneripisidium, Pisidium and Sphaerium are recognized within the subfamily instead of three cosmopolitan genera, Musculium, Sphaerium and Pisidium. Finally, Chapter 6 summarizes the results of all of these evolutionary studies. The results of these evolutionary studies not only increase our understanding of the phylogeny of the Sphaeriidae, but also provide valuable empirical data to assess polyploidy, a major topic in evolutionary biology. Advisors/Committee Members: Burch, John B. (advisor), Foighil, Diarmaid O. (advisor).

Subjects/Keywords: Bivalvia; Cytogenetics; Mollusca; Revision; Sphaeriidae; Sphaeriinae; Systematic; Veneroida

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lee, T. (2001). Systematic revision of the Sphaeriinae (Mollusca, Bivalvia, Veneroida, Sphaeriidae). (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/132965

Chicago Manual of Style (16^th Edition):

Lee, Taehwan. “Systematic revision of the Sphaeriinae (Mollusca, Bivalvia, Veneroida, Sphaeriidae).” 2001. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/132965.

MLA Handbook (7^th Edition):

Lee, Taehwan. “Systematic revision of the Sphaeriinae (Mollusca, Bivalvia, Veneroida, Sphaeriidae).” 2001. Web. 10 Apr 2021.

Vancouver:

Lee T. Systematic revision of the Sphaeriinae (Mollusca, Bivalvia, Veneroida, Sphaeriidae). [Internet] [Doctoral dissertation]. University of Michigan; 2001. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/132965.

Council of Science Editors:

Lee T. Systematic revision of the Sphaeriinae (Mollusca, Bivalvia, Veneroida, Sphaeriidae). [Doctoral Dissertation]. University of Michigan; 2001. Available from: http://hdl.handle.net/2027.42/132965

University of Michigan

11. Pearce, Timothy Allen. Effect of intraspecific crowding on growth rates in three terrestrial snail species.

Degree: PhD, Biology, 1994, University of Michigan

URL: http://hdl.handle.net/2027.42/104369

► In land snails, intraspecific crowding has been shown to affect growth rate, adult size, fecundity, survival, and activity, all of which can influence subsequent population… (more)

Subjects/Keywords: Biology, Ecology; Biology, Zoology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Pearce, T. A. (1994). Effect of intraspecific crowding on growth rates in three terrestrial snail species. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/104369

Chicago Manual of Style (16^th Edition):

Pearce, Timothy Allen. “Effect of intraspecific crowding on growth rates in three terrestrial snail species.” 1994. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/104369.

MLA Handbook (7^th Edition):

Pearce, Timothy Allen. “Effect of intraspecific crowding on growth rates in three terrestrial snail species.” 1994. Web. 10 Apr 2021.

Vancouver:

Pearce TA. Effect of intraspecific crowding on growth rates in three terrestrial snail species. [Internet] [Doctoral dissertation]. University of Michigan; 1994. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/104369.

Council of Science Editors:

Pearce TA. Effect of intraspecific crowding on growth rates in three terrestrial snail species. [Doctoral Dissertation]. University of Michigan; 1994. Available from: http://hdl.handle.net/2027.42/104369

University of Michigan

12. Walther, Andrea Coronel. A Systematic Study of North American Freshwater Limpets (Gastropoda: Hygrophila: Ancylidae).

Degree: PhD, Ecology and Evolutionary Biology, 2008, University of Michigan

URL: http://hdl.handle.net/2027.42/61567

► The freshwater limpet family Ancylidae, comprised exclusively of patelliform taxa, has a near-cosmopolitan distribution in freshwater ecosystems. Paul Basch was the last to thoroughly study… (more)

▼ The freshwater limpet family Ancylidae, comprised exclusively of patelliform taxa, has a near-cosmopolitan distribution in freshwater ecosystems. Paul Basch was the last to thoroughly study North American ancylid systematics, and I used his 1963 monograph as a guide in sampling nominal North American ancylid species and constructing representative nuclear and mitochondrial (mt) gene trees. My objectives were to a) assess the monophyly of the family Ancylidae, b) analyze intergeneric and interspecific ancylid relationships, and c) address the validity of nominal North American species. In the context of global samples, I recovered a monophyletic Ancylidae and a pronounced sub-familial dichotomy separating the New World genera (Laevapex, Hebetancylus, Uncancylus, Gundlachia) from a Holarctic sister clade (Ferrissia, Rhodacmea, Ancylus). While support for the two ancylid subfamilies was robust, support for specific intergeneric relationships within the subfamilies was lacking. In my gene trees, all nominal Laevapex species emerged as a single lineage, suggesting that the North American Laevapex is monotypic, comprised of only L. fuscus. This finding was corroborated by a geometric morphometric analysis of shell vouchers that indicated no difference in shell shape among the nominal species. Rare, highly divergent mt lineages in some Laevapex populations likely originated from either introgression or from persistent ancestral polymorphisms. Only two of 36 L. fuscus mt haplotypes occurred in multiple populations, indicating that long distance dispersal is rare, and field observations of phoresy on the giant water bug Belostoma flumineum identified it as a potential agent of local dispersal. North American Ferrissia samples formed two major clades, corresponding to the type species F. rivularis and the widespread F. fragilis. The former exhibited pronounced east-west geographic structure, with evidence of secondary transcontinental movement from the east to the west but no indication of introgression; thus, these lineages may be speciating. North American F. fragilis has cryptically invaded Europe and Asia, providing striking evidence of human-mediated intercontinental dispersal in ancylids, a feature that has further complicated systematic studies of this group. Advisors/Committee Members: O'Foighil, Diarmaid (committee member), Burch, John B. (committee member), Duda Jr, Thomas F. (committee member), Wiley, Michael J. (committee member).

Subjects/Keywords: Ancylid Systematics; Ferrissia; Laevapex; Molecular Phylogenetics; Ancylid Taxonomy; Ecology and Evolutionary Biology; Science

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Walther, A. C. (2008). A Systematic Study of North American Freshwater Limpets (Gastropoda: Hygrophila: Ancylidae). (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/61567

Chicago Manual of Style (16^th Edition):

Walther, Andrea Coronel. “A Systematic Study of North American Freshwater Limpets (Gastropoda: Hygrophila: Ancylidae).” 2008. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/61567.

MLA Handbook (7^th Edition):

Walther, Andrea Coronel. “A Systematic Study of North American Freshwater Limpets (Gastropoda: Hygrophila: Ancylidae).” 2008. Web. 10 Apr 2021.

Vancouver:

Walther AC. A Systematic Study of North American Freshwater Limpets (Gastropoda: Hygrophila: Ancylidae). [Internet] [Doctoral dissertation]. University of Michigan; 2008. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/61567.

Council of Science Editors:

Walther AC. A Systematic Study of North American Freshwater Limpets (Gastropoda: Hygrophila: Ancylidae). [Doctoral Dissertation]. University of Michigan; 2008. Available from: http://hdl.handle.net/2027.42/61567

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