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|a (JST)3672403
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|a eng
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|a Ford, Neil B.
|e verfasserin
|4 aut
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|a Reproduction in the Western Cottonmouth, Agkistrodon piscivorus leucostoma, in a Floodplain Forest
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|c 2004
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
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|a Reproductive data on the western cottonmouth, Agkistrodon piscivorus leucostoma, are scarce, generally incomplete, and usually based on pooled years for a given area. Current paradigms suggest that reproductive output in snakes can be influenced by local resource availability so temporal variation is important to document. Pregnant female western cottonmouths were collected for 3 consecutive years (2000-2002) from a lowland hardwood forest in northeastern Texas. This bottomland is exposed to flood pulses during winter that produce variable, but often large, amounts of prey for semi-aquatic snakes. Data recorded from 27 females indicated no difference in their snout-vent lengths (SVL) or masses among years. Of all reproductive traits, only clutch mass was correlated to female SVL and only in 1 year. Clutch mass and relative clutch mass varied temporally, suggesting reproductive output was influenced by prey availability. However, clutch size and mean offspring mass (that together comprise clutch mass) were both consistent among years. There was variation in mean offspring SVL and mass among females, and a negative correlation of both offspring characteristics to clutch size. These results suggest that the reproductive output of individual females might be responding to variation in prey availability in different ways (i.e., some by varying offspring number and others by modifying offspring size). Testing this hypothesis will require monitoring individual females for multiple years. /// Datos de la reproducción de la víbora mocasin de boca de algodón, Agkistrodon piscivorus leucostoma son escasos, generalmente incompletos, y usualmente basados en varios años agrupados de un área específica. Paradigmas actuales sugieren que el esfuerzo reproductivo de serpientes puede ser influenciado por la disponibilidad de recursos locales, por lo que es importante la documentación de la variación temporal de esos recursos. Hembras gravidas de la víbora fueron colectadas por tres años consecutivos (2000-2002) en un bosque deciduo de tierra baja del noreste de Texas. Durante el invierno esta área está expuesta a repetidas inundaciones que producen variable, pero a menudo, grandes cantidades de presas disponibles para serpientes semiacuáticas. Los datos obtenidos de 27 hembras no indicaron una diferencia en la longitud hocicocloaca (LHC) o en el peso entre los años. De todas las características reproductivas, únicamente el peso de la camada estuvo correlacionado con el LHC de la hembra y por sólo un año. El peso de la camada (PC) y el peso relativo de la camada variaron temporalmente, sugiriendo que el esfuerzo reproductivo estuvo influenciado por la disponibilidad de presas. Sin embargo, el tamaño de la camada y el peso promedio de las crías (que juntos constituyen el PC) fueron consistentes durante los años de estudio. Hubo una variación en el LHC promedio de las crías y el peso de las hembras, y una correlación negativa entre las dos características de las crías con el tamaño de la camada. Estos resultados sugieren que el esfuerzo reproductivo de hembras individuales podría responder a la variación en la disponibilidad de presas de modos diferentes (por ejemplo, algunas hembras varían el número de crías mientras que otras modifican el tamaño de ellas). Probar esta hipótesis requerirá un monitoreo individual de hembras durante varios años.
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| 650 |
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|a Biological sciences
|x Biology
|x Zoology
|x Animals
|x Reptiles
|x Snakes
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4 |
|a Biological sciences
|x Biology
|x Developmental biology
|x Reproduction
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Zoology
|x Animal anatomy
|x Animal physiology
|x Animal reproduction
|x Clutch size
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|a Business
|x Industry
|x Industrial sectors
|x Manufacturing industries
|x Consumer goods industries
|x Clothing industry
|x Clothing
|x Clothing accessories
|x Headwear
|x Head coverings
|x Bonnets
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| 650 |
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4 |
|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Landforms
|x Fluvial landforms
|x Alluvial landforms
|x Alluvial plains
|x Floodplains
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Genetics
|x Phenotypes
|x Phenotypic traits
|x Reproductive traits
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Zoology
|x Animal anatomy
|x Animal physiology
|x Animal reproduction
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| 650 |
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4 |
|a Biological sciences
|x Ecology
|x Animal ecology
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| 650 |
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4 |
|a Biological sciences
|x Wildlife studies
|x Wildlife management
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| 650 |
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4 |
|a Biological sciences
|x Biology
|x Zoology
|x Animal anatomy
|x Animal physiology
|x Animal reproduction
|x Parturition
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| 655 |
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4 |
|a research-article
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1 |
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|a Brischoux, François
|e verfasserin
|4 aut
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|a Lancaster, Debra
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The Southwestern Naturalist
|d Southwestern Association of Naturalist
|g 49(2004), 4, Seite 465-471
|w (DE-627)JST083713697
|x 19436262
|7 nnns
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|g volume:49
|g year:2004
|g number:4
|g pages:465-471
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|u https://www.jstor.org/stable/3672403
|3 Volltext
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|d 49
|j 2004
|e 4
|h 465-471
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