Journal ArticleDOI
Food Intake and Reproduction in Anolis acutus
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TLDR
The relationship between food intake and reproduction was investigated in an eastern and a western population of the iguanid lizard Anolis acutus on the island of St. Croix, and it was found that an increase in food intake did not cause a increase in female reproduction in this anole.Abstract:
The relationship between food intake and reproduction was investigated in an eastern and a western population of the iguanid lizard Anolis acutus on the island of St. Croix. Reproduction was higher in the west than in the east. Females with oviductal eggs were present in every sample in the west, but were absent until May in the east. Small fat bodies accompanied the higher reproduction in the west. Initially, fat bodies were large in the east, but as reproduction increased, fat levels decreased. Food intake, as measured by stomach weights, was not significantly different between localities. To investigate whether an increase in food intake increases reproduction, lizards in the east were fed supplementally over 51 days. Reproductive effort (100 x gonad weight/lean body weight) failed to increase in females but did increase in males. The reproductive condition of females was identical between food augmented and control lizards, but fat levels increased tremendously in food augmented lizards. The weight of fat bodies was 6 x greater than controls in females, and 8 x greater in males. An increase in food did not cause an increase in female reproduction in this anole.read more
Citations
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Journal ArticleDOI
Food supplementation experiments with terrestrial vertebrates: patterns, problems, and the future
TL;DR: The typical population response to food supplementation was two- to three-fold increase in density, but no change in the pattern of population dynamics, which points to the need for researchers to conduct food supplementation experiments in tropical environments.
Journal ArticleDOI
Interfaces between Biophysical and Physiological Ecology and the Population Ecology of Terrestrial Vertebrate Ectotherms
TL;DR: This work defines operant sources of selection and the effects of these averaged over the lifetime of individuals exposed to different environmental factors, and synthesizes a probabilitistic definition of a life history.
Journal ArticleDOI
Is sperm really so cheap? Costs of reproduction in male adders, Vipera berus
TL;DR: The data suggest that sperm production may be a major energy cost to reproducing male adders, and that this species offers a useful system in which to further investigate this possibility.
Book ChapterDOI
13 – Sexual Selection and Sperm Competition in Reptiles
Mats Olsson,Thomas Madsen +1 more
TL;DR: The chapter describes the traits, which determine male reproductive success in reptiles, and ongoing sexual selection on such traits arising from variance in mating success, and investigates which of these traits and selective events of reptiles qualify as particularly suitable research models.
Journal ArticleDOI
Fat cycling in the mosquitofish (Gambusia affinis): fat storage as a reproductive adaptation.
David N. Reznick,B. Braun +1 more
TL;DR: The trends in the data indicate that fat reserves are used to shift investment in reproduction from the late summer to the following spring, and in males, deferring maturity, rather than maturing in August, allows them to store the necessary reserves to survive the winter so that they can mate the followingSpring.
References
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Journal ArticleDOI
Comparative Animal Physiology
D. S. Farner,Verner John Wulff,C. Ladd Prosser,David W. Bishop,Frank A. Brown,Theodore Louis Jahn +5 more
Journal ArticleDOI
Differences in Insect Abundance and Diversity Between Wetter and Drier Sites During a Tropical Dry Season
TL;DR: When compared with temperate data on insect communities there are indications that the four tropical communities examined have a much greater number of species and possibly a greater internal uniqueness than similar temperature communities.
Journal ArticleDOI
Reproductive effort in anoline lizards
Robin M. Andrews,A. Stanley Rand +1 more
TL;DR: The evolution of low clutch number in relatively small tropical lizards has several non-exclusive explanations, one of which is specific to arboreal lizards (Anolis, geckonids, and some scincids), involves their adhesive toe pads, which facilitate climbing.