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You searched for subject:(Bufo fowleri). Showing records 1 – 2 of 2 total matches.

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1. Rowlison, Tricia Marie. THE COMPARATIVE EFFECTS OF ARGININE VASOTOCIN ON REPRODUCTION IN THE BOREAL (BUFO BOREAS BOREAS) AND FOWLERS (BUFO FOWLERI) TOAD.

Degree: MS, Agriculture and Life Sciences, College of, 2012, Mississippi State University

URL: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042012-160331/  ;

The aim of this study was to compare the effects of arginine vasotocin (AVT) administration in the endangered boreal toad (<i>Bufo boreas boreas</i>) and common Fowlers toad (<i>Bufo fowleri</i>). The objectives of this study were to determine if AVT could elicit: 1) calling, and 2) amplexus behaviors. Toads were paired into single male:female groups and administered AVT at varying concentrations: 0.1, 1.0, 5.0, 10.0 and 25.0 μg/g and in different combinations: 1) only male was treated; 2) only female was treated, and 3) both male and female treated. AVT failed to stimulate any breeding behavior in the boreal toad, but the administration of AVT to both <i>B. Fowleri</i> genders significantly affected the duration of amplexus (p<0.0347). Also, the concentration of AVT significantly affected the length of amplexus (p<0.0429) and call frequency (p<0.0294). These results will be valuable for breeding programs where animals are failing to show natural reproductive behavior. Advisors/Committee Members: Dr. Scott Willard (chair), Dr. Andrew Kouba (committee member), Dr. Peter Ryan (committee member).

Subjects/Keywords: calling; arginine vasotocin; reproduction; amphbian; amplexus; Bufo fowleri; Bufo boreas boreas; hormone

…59 The Behavioral Effects of Arginine Vasotocin in the Bufo Fowleri Species… …54 4.3 Bufo Fowleri Toad Mortality… …compared to another species, the fowler’s 2 toad (Bufo fowleri). The Fowler’s toad is… …Fowler’s Toad The Fowler’s toad, Bufo fowleri, is a common species from the eastern region of the… …30 Study 1. Effects of Arginine Vasotocin on Reproductive Behaviors in B. Fowleri… 

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

APA (6th Edition):

Rowlison, T. M. (2012). THE COMPARATIVE EFFECTS OF ARGININE VASOTOCIN ON REPRODUCTION IN THE BOREAL (BUFO BOREAS BOREAS) AND FOWLERS (BUFO FOWLERI) TOAD. (Masters Thesis). Mississippi State University. Retrieved from http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042012-160331/ ;

Chicago Manual of Style (16th Edition):

Rowlison, Tricia Marie. “THE COMPARATIVE EFFECTS OF ARGININE VASOTOCIN ON REPRODUCTION IN THE BOREAL (BUFO BOREAS BOREAS) AND FOWLERS (BUFO FOWLERI) TOAD.” 2012. Masters Thesis, Mississippi State University. Accessed March 06, 2021. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042012-160331/ ;.

MLA Handbook (7th Edition):

Rowlison, Tricia Marie. “THE COMPARATIVE EFFECTS OF ARGININE VASOTOCIN ON REPRODUCTION IN THE BOREAL (BUFO BOREAS BOREAS) AND FOWLERS (BUFO FOWLERI) TOAD.” 2012. Web. 06 Mar 2021.

Vancouver:

Rowlison TM. THE COMPARATIVE EFFECTS OF ARGININE VASOTOCIN ON REPRODUCTION IN THE BOREAL (BUFO BOREAS BOREAS) AND FOWLERS (BUFO FOWLERI) TOAD. [Internet] [Masters thesis]. Mississippi State University; 2012. [cited 2021 Mar 06]. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042012-160331/ ;.

Council of Science Editors:

Rowlison TM. THE COMPARATIVE EFFECTS OF ARGININE VASOTOCIN ON REPRODUCTION IN THE BOREAL (BUFO BOREAS BOREAS) AND FOWLERS (BUFO FOWLERI) TOAD. [Masters Thesis]. Mississippi State University; 2012. Available from: http://sun.library.msstate.edu/ETD-db/theses/available/etd-04042012-160331/ ;


University of New Orleans

2. Vogel, Laura Sanders. The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies.

Degree: PhD, Biological Sciences, 2007, University of New Orleans

URL: https://scholarworks.uno.edu/td/579 

Two of the most pervasive threats to species biodiversity are invasive species and habitat loss and degradation. Invasive species are often relatively insensitive to disturbance and many expand their range into disturbed and fragmented habitats. This dissertation uses an interdisciplinary approach to investigate how anthropogenic habitat disturbance is precipitating a range expansion in an invasive toad species, Bufo nebulifer, which is driving a decline in its native congener, B. fowleri. I employed a remote sensing and GIS study using historical data to compare changes in the two species distributions and habitat changes, a molecular genetic study to identify interspecific hybrids and their potential effects on the parental species, and an experimental ecology study to look at the effects of competition and predation on the two species. The results of the landscape level analyses of species' distributional changes in different disturbance levels showed that both species' distributions have changed significantly. The distributions of the two species are inversely affected by habitat disturbance; the distribution of B. fowleri in highly degraded habitat has contracted while the expansion of B. nebulifer increased substantially. The molecular genetic study successfully demonstrated the use of nuclear and mitochondrial markers to identify cryptic hybrids and their maternal lineage. Three hybrids were detected using nuclear introns and a morphologically cryptic hybrid was identified using mitochondrial DNA as the progeny of a cross that was previously thought to be inviable. Although relatively few hybrids were currently found, the identification of a cryptic hybrid implies that the rate of historical hybridization may have been drastically underestimated. Ecological studies showed that competition with B. nebulifer tadpoles had a negative effect on both body size measures and survival to metamorphosis for B. fowleri tadpoles. The addition of predators to experiment did not favor the survival of B. fowleri over B. nebulifer. Bufo fowleri's inability to compete with its invasive congener could be a driving mechanism for the decline of B. fowleri and the expansion of B. nebulifer. The methods discussed in this dissertation offer promising and practical new approaches for evaluating and managing changes in the distribution of species of conservation concern. Advisors/Committee Members: Johnson, Steven, Kandl, Karen, Clancy, Mary.

Subjects/Keywords: Bufo fowleri; Bufo nebulifer; invasive species; hybrids; ranges; nuclear DNA; introns; SNPs; mtDNA; remote sensing; GIS; museum data; competition; predation; disturbance

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

APA (6th Edition):

Vogel, L. S. (2007). The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies. (Doctoral Dissertation). University of New Orleans. Retrieved from https://scholarworks.uno.edu/td/579

Chicago Manual of Style (16th Edition):

Vogel, Laura Sanders. “The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies.” 2007. Doctoral Dissertation, University of New Orleans. Accessed March 06, 2021. https://scholarworks.uno.edu/td/579.

MLA Handbook (7th Edition):

Vogel, Laura Sanders. “The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies.” 2007. Web. 06 Mar 2021.

Vancouver:

Vogel LS. The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies. [Internet] [Doctoral dissertation]. University of New Orleans; 2007. [cited 2021 Mar 06]. Available from: https://scholarworks.uno.edu/td/579.

Council of Science Editors:

Vogel LS. The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies. [Doctoral Dissertation]. University of New Orleans; 2007. Available from: https://scholarworks.uno.edu/td/579

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