Do Reproductive Costs Affect Adult Survival in Mexican Dusky Rattlesnakes? A Test Using Mark-Recapture Data
Por:
Luis Jaramillo-Alba, Jose, Adan Perez-Mendoza, Hibraim, Diaz de la Vega-Perez, Anibal Helios, Akcali, Christopher K.
Publicada:
1 mar 2020
Resumen:
Survival rate is one of the most poorly characterized components of the
life history of many species of reptiles, especially snakes.
Reproductive activity can increase the risk of mortality. In this study,
we examined whether sex-specific reproductive costs affect the survival
probability of a viviparous rattlesnake, Crotalus triseriatus, in
central Mexico from 2015 to 2018. We used a multimodel inference
framework to test two hypotheses: (1) female survival probability should
decrease during the late-gestation and birthing period, when females are
less mobile and try to achieve stable body temperatures by behavioral
thermoregulation ; and (2) male survival probability should decrease
during the mating season, when males are more actively searching for
potential mates. Our data did not support these hypotheses. Mean (+1 SE)
monthly survival probability of both males and females was 0.96 +/-
0.01, and recapture probability was 0.11 +/- 0.01. Annual survival rate
was 0.72 +/- 0.12. Monthly estimated mean adult population size varied
from 16 to 71 adult rattlesnakes. Survival probability was positively
correlated with body size. The reproductive costs could have been
obscured by the fact that females do not reproduce every year and,
therefore, the demands of the mating season are not as tightly linked to
survivorship as we hypothesized.
Filiaciones:
Luis Jaramillo-Alba, Jose:
UNAM, Fac Estudios Super Iztacala, Lab Ecol Evolut Anfibios & Reptiles, Ave Las Barrios Numero 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Posgrad Ciencias Biol, Unidad Posgrad, Edificio A,1 Piso,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Adan Perez-Mendoza, Hibraim:
UNAM, Fac Estudios Super Iztacala, Lab Ecol Evolut Anfibios & Reptiles, Ave Las Barrios Numero 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Diaz de la Vega-Perez, Anibal Helios:
Univ Autonoma Tlaxcala, Ctr Tlaxcala Biol Conducta, Consejo Nacl Ciencia & Tecnol, Km 1-5 Carretera Tlaxcala, Puebla 90070, Tlaxcala, Mexico
Akcali, Christopher K.:
Univ N Carolina, Dept Biol, Chapel Hill, NC 27599 USA
North Carolina Museum Nat Sci, Raleigh, NC 27601 USA
Department of Biology, University of North Carolina, Chapel Hill, NC 27599, United States
North Carolina Museum of Natural Sciences, Raleigh, NC 27601, United States
Laboratorio de Ecología Evolutiva de Anfibios y Reptiles, Facultad de Estudios Superiores Iztacala, Unam, Avenida de Los Barrios número 1, Los Reyes Iztacala, Tlalnepantla, Estado de México, C.P. 54090, Mexico
Posgrado en Ciencias Biológicas, Unidad de Posgrado, Edificio A, 1° Piso, Circuito de Posgrados, Ciudad Universitaria, Coyoacán, Ciudad de México, C.P. 04510, Mexico
Consejo Nacional de Ciencia y Tecnología-Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, km 1.5 Carretera Tlaxcala-Puebla, Tlaxcala, C.P. 90070, Mexico
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