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Comparative energetics and thermal responses to feeding in allied Agkistrodon snakes with contrasting diet and habitat use.
J Comp Physiol B. 2020 May; 190(3):329-339.JC

Abstract

Variation in animal responses to feeding can be attributed to a variety of ecological factors, including foraging mode and dietary specialization. Specialization often favors species that have traits for exploiting food resources that are rare and that are not commonly shared by dietary generalists. We investigated physiological and behavioral responses to feeding between two snake species with different degrees of mammal feeding specialization: Agkistrodon contortrix (copperheads; a terrestrial species in which adults feed almost exclusively on mammals) and Agkistrodon piscivorus (cottonmouths; a semi-aquatic species feeding less on mammals and primarily on ectothermic prey). We measured metabolic rates (at 20, 25, and 30 °C) and body temperature (Tb) selection of snakes both pre- and post-feeding. Following the consumption of rodent meals, post-feeding energy use was higher in A. piscivorus than A. contortrix at both 25 and 30 °C. After feeding, A. piscivorus maintained body temperatures that were 3-4 °C higher, whereas A. contortrix remained within 1 °C of their pre-feeding Tb. Our results support the contention that dietary specialization leads to potential energetic advantages and that generalist species may change their behavior to offset energy used to digest prey.

Authors+Show Affiliations

Center of Excellence for Field Biology, Department of Biology, Austin Peay State University, Clarksville, TN, 37044, USA. mmspencer99@gmail.com.Center of Excellence for Field Biology, Department of Biology, Austin Peay State University, Clarksville, TN, 37044, USA.Center of Excellence for Field Biology, Department of Biology, Austin Peay State University, Clarksville, TN, 37044, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32112179

Citation

Spencer, McKayla M., et al. "Comparative Energetics and Thermal Responses to Feeding in Allied Agkistrodon Snakes With Contrasting Diet and Habitat Use." Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology, vol. 190, no. 3, 2020, pp. 329-339.
Spencer MM, Pierson MT, Gienger CM. Comparative energetics and thermal responses to feeding in allied Agkistrodon snakes with contrasting diet and habitat use. J Comp Physiol B, Biochem Syst Environ Physiol. 2020;190(3):329-339.
Spencer, M. M., Pierson, M. T., & Gienger, C. M. (2020). Comparative energetics and thermal responses to feeding in allied Agkistrodon snakes with contrasting diet and habitat use. Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology, 190(3), 329-339. https://doi.org/10.1007/s00360-020-01267-4
Spencer MM, Pierson MT, Gienger CM. Comparative Energetics and Thermal Responses to Feeding in Allied Agkistrodon Snakes With Contrasting Diet and Habitat Use. J Comp Physiol B, Biochem Syst Environ Physiol. 2020;190(3):329-339. PubMed PMID: 32112179.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative energetics and thermal responses to feeding in allied Agkistrodon snakes with contrasting diet and habitat use. AU - Spencer,McKayla M, AU - Pierson,Matt T, AU - Gienger,C M, Y1 - 2020/02/28/ PY - 2019/06/04/received PY - 2020/02/12/accepted PY - 2020/02/06/revised PY - 2020/3/1/pubmed PY - 2020/3/1/medline PY - 2020/3/1/entrez KW - Dietary specialization KW - Energetics KW - SDA KW - Snake KW - Thermal preferences SP - 329 EP - 339 JF - Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology JO - J. Comp. Physiol. B, Biochem. Syst. Environ. Physiol. VL - 190 IS - 3 N2 - Variation in animal responses to feeding can be attributed to a variety of ecological factors, including foraging mode and dietary specialization. Specialization often favors species that have traits for exploiting food resources that are rare and that are not commonly shared by dietary generalists. We investigated physiological and behavioral responses to feeding between two snake species with different degrees of mammal feeding specialization: Agkistrodon contortrix (copperheads; a terrestrial species in which adults feed almost exclusively on mammals) and Agkistrodon piscivorus (cottonmouths; a semi-aquatic species feeding less on mammals and primarily on ectothermic prey). We measured metabolic rates (at 20, 25, and 30 °C) and body temperature (Tb) selection of snakes both pre- and post-feeding. Following the consumption of rodent meals, post-feeding energy use was higher in A. piscivorus than A. contortrix at both 25 and 30 °C. After feeding, A. piscivorus maintained body temperatures that were 3-4 °C higher, whereas A. contortrix remained within 1 °C of their pre-feeding Tb. Our results support the contention that dietary specialization leads to potential energetic advantages and that generalist species may change their behavior to offset energy used to digest prey. SN - 1432-136X UR - https://www.unboundmedicine.com/medline/citation/32112179/Comparative_energetics_and_thermal_responses_to_feeding_in_allied_Agkistrodon_snakes_with_contrasting_diet_and_habitat_use L2 - http://dx.doi.org/10.1007/s00360-020-01267-4 DB - PRIME DP - Unbound Medicine ER -
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