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You searched for subject:(Daily growth increments). Showing records 1 – 2 of 2 total matches.

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1. Al-Murayati, Haider. Diversity of the bacterial community and secondary sexual characters in the peacock : Diversité de la communauté bactérienne et caractères sexuels secondaires chez le paon.

Degree: Docteur es, Biologie, 2017, Paris Saclay

Les plumes d'oiseaux abritent de nombreux microorganismes qui pourraient être acquis dans l'environnement, ces microorganismes pouvant exercer une sélection intense sur leurs hôtes en réduisant leur fécondité et leur survie. Plusieurs taxons bactériens qui vivent sur des plumes ont la capacité de dégrader la kératine des plumes et causent des dommages à leur structure et peuvent modifier aussi leur coloration. Les oiseaux utilisent des signaux visuels tels que des couleurs vives ou des ornementations exagérées pour la communication socio-sexuelle ainsi que la reconnaissance des espèces. Seuls les individus en bonne santé sont capables de produire des caractères sexuels secondaires exagérés et restent résistants aux parasites débilitants. Le paon (Pavo cristatus) est une espèce polygame qui a plusieurs décorations exagérées, les caractères sexuels secondaires les plus remarquables du paon sont leur traîne décorée avec des ocelles magnifiques qui contiennent trois couleurs irisées différentes. Grâce à une technique basée sur la culture, j'ai isolé la communauté bactérienne des plumes de différentes parties colorées des ocelles de la traîne du paon. L'étude révèle qu'il y a eu une répartition hétérogène des bactéries parmi les différentes parties colorées des ocelles. L'abondance et la prévalence des taxa bactériens spécifiques étaient liées au degré de dégradation des plumes, à l'expression de différents caractères sexuels secondaires, à des changements dans la coloration des ocelles et à l'augmentation de la croissance quotidienne des plumes. En outre, nous avons constaté un petit effet de l'expression de caractères sexuels secondaires sur la proportion sexuelle des couvées avec un biais en faveur des individus masculins. Les travaux présentés dans cette thèse fournissent des preuves que les ocelles de plumes peuvent être considérés comme un signal fiable de la diversité et de l'abondance de bactéries chez le paon. En conséquence, ils représentent une indication pour la qualité individuelle, ce qui permet aux femelles de choisir des mâles avec une communauté bactérienne spécifique.

Bird feathers harbour numerous microorganisms that could be acquired from the surrounding environment, these microorganisms may exert intense selection on their hosts by reducing fecundity and survivorship. Several bacterial taxa that live on feathers have the ability to degrade feather keratin and cause damage to feather structure and may alter the feather colouration. Birds use visual signals such as bright colours or exaggerated ornamentation for socio-sexual communication as well as species recognition. Only healthy individuals are able to produce exaggerated secondary sexual characters and still remain resistant to debilitating parasites. Peacocks (Pavo cristatus) is a polygamous species that have different exaggerated ornamentation, the most notable secondary sexual characters of the peacock are their long-decorated trains that comprise the magnificent ocelli which contain three different iridescent colours. Through a culture based…

Advisors/Committee Members: Møller, Anders Pape (thesis director).

Subjects/Keywords: Pavo cristatus; Diversite bactérienne; Barbules; Barbes; Dégradation des plumes; Incréments de croissance quotidienne; Coloration des plumes; Traîne paon ocelles; Sexe ratio; Caractère sexuel secondaire; Pavo cristatus; Bacterial diversity; Barbules; Barbs; Feather degradation; Daily growth increments; Feather colouration; Peacock train ocelli; Sex ratio; Secondary sexual characters

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

APA (6th Edition):

Al-Murayati, H. (2017). Diversity of the bacterial community and secondary sexual characters in the peacock : Diversité de la communauté bactérienne et caractères sexuels secondaires chez le paon. (Doctoral Dissertation). Paris Saclay. Retrieved from http://www.theses.fr/2017SACLS096

Chicago Manual of Style (16th Edition):

Al-Murayati, Haider. “Diversity of the bacterial community and secondary sexual characters in the peacock : Diversité de la communauté bactérienne et caractères sexuels secondaires chez le paon.” 2017. Doctoral Dissertation, Paris Saclay. Accessed April 18, 2019. http://www.theses.fr/2017SACLS096.

MLA Handbook (7th Edition):

Al-Murayati, Haider. “Diversity of the bacterial community and secondary sexual characters in the peacock : Diversité de la communauté bactérienne et caractères sexuels secondaires chez le paon.” 2017. Web. 18 Apr 2019.

Vancouver:

Al-Murayati H. Diversity of the bacterial community and secondary sexual characters in the peacock : Diversité de la communauté bactérienne et caractères sexuels secondaires chez le paon. [Internet] [Doctoral dissertation]. Paris Saclay; 2017. [cited 2019 Apr 18]. Available from: http://www.theses.fr/2017SACLS096.

Council of Science Editors:

Al-Murayati H. Diversity of the bacterial community and secondary sexual characters in the peacock : Diversité de la communauté bactérienne et caractères sexuels secondaires chez le paon. [Doctoral Dissertation]. Paris Saclay; 2017. Available from: http://www.theses.fr/2017SACLS096


North Carolina State University

2. Schwenke, Kara Laurice. Age, Growth and Reproduction of Dolphin (Coryphaena hippurus) Caught Off the Coast of North Carolina.

Degree: MS, Zoology, 2005, North Carolina State University

The common dolphin (Coryphaena hippurus) supports economically important fisheries along the east coast of the United States. In recent years, landings of dolphin from the United States Atlantic have increased dramatically. For example, recreational landings in the US South Atlantic Bight have increased from 162,000 dolphin in the 1960s to over 1.3 million dolphin in recent years. The last age and growth study of North Carolina dolphin was conducted in the early 1960s. It is hypothesized that life history parameters may have changed due to increased exploitation. Age, growth and reproduction were studied on dolphin (n=802; size range=89 to 1451 mm FL) collected between May 2002 and May 2004 from commercial and recreational catches in North Carolina. Annual increments from scales (n=541) and daily increments from sagittal otoliths (n=126) were examined; estimated von Bertalanffy parameters were L∞ = 1299 mm FL and k = 1.08 yr ⁻¹. The maximum age observed was 3 years. No major change in length at age has occurred since the early 1960s. Daily growth increments for age-0 dolphin reduced much of the variability in length-at-age values for age-0 dolphin and provided an average growth rate of 3.78 mm/day in the first six months, which is extremely fast for a teleost fish. Growth of North Carolina dolphin is similar to that found in Florida and the Mediterranean, but differs from observed growth in the Caribbean and Gulf of Mexico. Age at 50% maturity was around 4 months for female dolphin and 6 months for male dolphin. Monthly length-adjusted gonadal weights suggest that peak spawning occurs from April through July off North Carolina; back-calculated hatch dates from age-0 dolphin along with prior studies on the east coast of Florida suggest that dolphin spawning occurs year round with highest levels from January through June. This study provides an updated and improved (year-round sampling and otolith daily ages) age-length function for dolphin caught off the coast of North Carolina using both scale annuli and daily growth increments and provides some of the first comprehensive data on North Carolina dolphin reproduction. The life history of dolphin, including fast growth and early maturity, allows for high levels of exploitation. Advisors/Committee Members: Joseph E. Hightower, Committee Member (advisor), Leonard A. Stefanski, Committee Member (advisor), Jeffrey A. Buckel, Committee Chair (advisor).

Subjects/Keywords: size at maturity; coryphaena hippurus; dolphin; daily growth increments in otoliths; scale annuli; gonadosomatic index

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Schwenke, K. L. (2005). Age, Growth and Reproduction of Dolphin (Coryphaena hippurus) Caught Off the Coast of North Carolina. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/2542

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Schwenke, Kara Laurice. “Age, Growth and Reproduction of Dolphin (Coryphaena hippurus) Caught Off the Coast of North Carolina.” 2005. Thesis, North Carolina State University. Accessed April 18, 2019. http://www.lib.ncsu.edu/resolver/1840.16/2542.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Schwenke, Kara Laurice. “Age, Growth and Reproduction of Dolphin (Coryphaena hippurus) Caught Off the Coast of North Carolina.” 2005. Web. 18 Apr 2019.

Vancouver:

Schwenke KL. Age, Growth and Reproduction of Dolphin (Coryphaena hippurus) Caught Off the Coast of North Carolina. [Internet] [Thesis]. North Carolina State University; 2005. [cited 2019 Apr 18]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2542.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Schwenke KL. Age, Growth and Reproduction of Dolphin (Coryphaena hippurus) Caught Off the Coast of North Carolina. [Thesis]. North Carolina State University; 2005. Available from: http://www.lib.ncsu.edu/resolver/1840.16/2542

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.