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- W1567895621 abstract "The rate at which organisms acquire resources is a critical trait and foraging mode can vary from sit-and-wait tactics to being highly mobile and active. Snakes provide a robust opportunity to examine the physiological correlates of contrasted foraging strategies. In this context, haematocrit (Hct), a proxy of blood oxygen carrying capacity, should be a reliable indicator of aerobic activity levels. We used phylogenetically informed models to examine the relationship between foraging mode and Hct in 80 snake species. After accounting for clade and habitat effects, we found a significant relationship of Hct with foraging mode; Hct is lower in snakes that ambush prey compared to active foragers across habitats. Species using both foraging tactics had marginally lower Hct than active foragers. Ambush foraging tactics are widespread in snakes, notably among low-energy specialists that usually display low feeding frequency, as well as limited activity and daily movements. Because Hct influences blood viscosity, low levels may thus be advantageous by reducing maintenance and locomotory costs. Further studies are required to better understand the implication of foraging mode on blood characteristics and other aspects of snake physiology." @default.
- W1567895621 created "2016-06-24" @default.
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- W1567895621 date "2014-01-16" @default.
- W1567895621 modified "2023-09-25" @default.
- W1567895621 title "Ambush or active life: foraging mode influences haematocrit levels in snakes" @default.
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- W1567895621 doi "https://doi.org/10.1111/bij.12223" @default.
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