The influence of sex and body size on food habits of a giant tropical snake, Python reticulatus

@article{Shine1998TheIO,
  title={The influence of sex and body size on food habits of a giant tropical snake, Python reticulatus},
  author={Richard Shine and Peter S. Harlow and J. Scott Keogh and Boeadi},
  journal={Functional Ecology},
  year={1998},
  volume={12},
  pages={248-258}
}
1. In many animal species, dietary habits shift with body size, and differ between the sexes. However, the intraspecific range of body sizes is usually low, making it difficult to quantify size-associated trophic shifts, or to determine the degree to which sex differences in diet are due to body-size differences. Large snakes are ideal for such a study, because they provide a vast range of body sizes within a single population. 2. More than 1000 Reticulated Pythons (Python reticulatus) from… 
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References

SHOWING 1-10 OF 35 REFERENCES

Sexual dimorphism and niche divergence: feeding habits of the Arafura filesnake

The composition of the diet varied seasonally and with the size as well as the gender of the snakes, showing extreme sexual dimorphism in body length, body shape, relative head size, head shape, foraging habitat and diet.

Variation in sexual size dimorphism and maximum body size among adder populations : Effects of prey size

It is argued that optimal body size for survival is locally determined by prey availability and size of prey items, however, due to the fecundity advantage of large size in females, female adders deviate from the optimumsize for survival, and more so when this optimum size is small.

Intersexual Dietary Divergence and the Evolution of Sexual Dimorphism in Snakes

  • R. Shine
  • Biology
    The American Naturalist
  • 1991
It is inferred that the sexes originally diverged in body sizes or ecology because of differences in reproductive biology, with the subsequent evolution of sexual dimorphism in feeding structures through independent adaptations to foraging in each sex.

ONTOGENY OF WATER SNAKE FORAGING ECOLOGY

Regression analysis indicates that all four species eat larger prey as they mature, however, the largest individuals are females, and in two of the four species the large females eat a different array of prey than smaller nonspecific males.

Adaptive variation in head size in Vipera berus L. populations

Geographic variation in relative head length of adders was smallest on the mainland and increased on the islands with increasing body size of the main prey, Microtus agrestis, suggesting stabilizing selection for head size within each population.

Commercial harvesting of giant lizards: The biology of water monitors Varanus salvator in southern Sumatra

Size and Proportion Relationship Between the Beaked Sea Snake and Its Prey

The relationship between the size and body proportions of E. schistosa relative to its catfish prey is explored and a study of the food and feeding behavior of the beaked sea snake in Malaysia revealed behavioral specializations for ingesting spiny catfish (Ariidae).

Patterns of Survival, Growth, and Maturation in Snakes and Lizards

These analyses show that squamate reptiles exhibit interspecific and intraspecific patterns of growth, survival rate, and maturation that are of the same qualitative (and, often, quantitative) form as those seen in other types of organisms in which growth continues after maturity.

Ecology of a Low-energy Specialist: Food Habits and Reproductive Biology of the Arafura Filesnake (Acrochordidae)

  • R. Shine
  • Environmental Science, Biology
  • 1986
Field studies of Acrochordus arafurae in the Alligator Rivers Region of tropical Australia show that these aquatic snakes feed and reproduce less frequently than do most other snake species studied previously, suggesting a low frequency of reproduction in individual females.

Biology and Commercial Utilization of Acrochordid Snakes, with Special Reference to Karung (Acrochordus javanicus)

The data on the biology of A. javanicus, and on the ways in which this species is collected for the commercial skin industry, suggest that the current harvest is unlikely to seriously reduce wild populations, and suggests that thisspecies is poorly suited to commercial harvesting.