Nutritional effects on reproductive performance of captive adult female coyotes (Canis latrans)

Animal Reproduction Science
Eric M GeseFrederick F Knowlton

Abstract

Interactions between animals and their environment are fundamental to ecological research. Field studies of coyote (Canis latrans) reproductive performance suggest mean litter size changes in response to prey abundance. However, this relationship has been assessed primarily by using carcasses collected from trappers. The objective of this study was to assess whether nutritional manipulation prior to mating affected reproduction in adult female coyotes. We examined the effects of caloric restriction during the 7 months prior to estrus on the reproductive rates of 11 captive female coyotes and the subsequent initial survival of pups through two reproductive cycles. This was a 2-year study with a cross-over design so each female was monitored for reproductive performance on each of the two diet treatments. We assessed the number of implantation scars, number of pups born, sex ratios of pups, average pup weight at birth and 2- and 6-weeks of age, and the survival rates between implantation and 2-weeks of age for two diet treatments. We found the mean number of implantation sites and pups whelped during a reproductive cycle was influenced by food-intake prior to conception. Additionally, we found evidence suggesting the effects of n...Continue Reading

References

Jan 1, 1978·The Journal of Nutrition·H T Epstein
Jan 18, 2006·Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine·U Kosior-KorzeckaCz Lipecka
Apr 1, 1979·Theriogenology·J S GreenJ T Flinders
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Jan 1, 1990·Nutrition Research Reviews·J J Robinson
Nov 9, 2010·Animal Reproduction Science·Patrick W Concannon

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Citations

Jul 1, 2020·Oecologia·Clément ChevallierDominique Berteaux
Aug 28, 2019·Journal of Cellular Biochemistry·Manjun ZhaiJilong Han
Jan 9, 2019·Ecology and Evolution·Christopher J SchellJill M Mateo

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