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- W1997939400 abstract "Actively foraging species of snakes often consume large numbers of small prey, which creates a high meal to snake mass ratio. Because they may also rely on speed to avoid predation, this might negatively influence survival. We examined the diet of 313 western ribbon snakes ( Thamnophis proximus Say in James, 1823), a very attenuated species, in a floodplain in northeastern Texas. Of the 142 individuals with food, adult males ate 9 prey types, followed by females with 8, and juveniles only 6. The ontogenetic increase in prey diversity was predicted. However, female ribbon snakes are larger than males and their fewer prey types may reflect a strategy where smaller prey are dropped from the diet. Seasonal activity of prey and snake class was generally correlated. Overall individual prey sizes were comparably small. However, over 50% of the snakes contained multiple prey and total meal masses were similar to the maximum prey sizes of ambush foragers. Adults stopped feeding at proportionally lower meal mass to predator mass ratios than juveniles. The benefits of rapid growth for juveniles may outweigh predation risks associated with high prey consumption, but for adults of this species, consuming lighter meals may be the most stable strategy." @default.
- W1997939400 created "2016-06-24" @default.
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- W1997939400 date "2009-03-01" @default.
- W1997939400 modified "2023-10-16" @default.
- W1997939400 title "Ontogenetic and sexual differences in diet in an actively foraging snake,<i>Thamnophis proximus</i>" @default.
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- W1997939400 doi "https://doi.org/10.1139/z09-008" @default.
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