Rearing density and food variety impact growth, development, and survival of larvae in the declining amphibian, Pseudacris maculata.

Autor: Ethier JP; Biology Department, University of Ottawa, Ottawa, Canada., Worth M; Biology Department, University of Ottawa, Ottawa, Canada., Mazerolle MJ; Département des sciences du bois et de la forêt, Université Laval, Quebec City, Canada., Trudeau VL; Biology Department, University of Ottawa, Ottawa, Canada.
Jazyk: angličtina
Zdroj: Zoo biology [Zoo Biol] 2024 Sep-Oct; Vol. 43 (5), pp. 416-424. Date of Electronic Publication: 2024 Jun 20.
DOI: 10.1002/zoo.21848
Abstrakt: Boreal chorus frogs (Pseudacris maculata Agassiz 1850) are a widespread amphibian in North America, but several populations are in decline. Specifically, we are developing captive breeding and reintroduction methods for the Great Lakes/St. Lawrence-Canadian Shield population. Here we present the effects of tadpole density, food variety, and addition of supplemental minerals to rearing water on the growth, development, and survival during the larval and metamorph/juvenile stages. We conducted two experiments using a factorial design. We found that low tadpole density (1 vs. 2 tadpoles/L) and high food variety (five food items vs. three food items) significantly increased tadpole body length and Gosner stage after 2 weeks (p < .001), increased survival to metamorphosis (p < .001), decreased time to metamorphosis (p < .001), and increased weight after metamorphosis (p < .001). On average, tadpoles in the high density/low food treatment, compared to the low density/high food, were 25% smaller after 2 weeks, had 3.9× lower survival to metamorphosis, took 1.25× longer to reach metamorphosis, and weighed 1.5× less after metamorphosis. In contrast, neither density (0.5 vs. 1 tadpole/L) nor mineral supplemented water affected growth and development, but tadpole survival was higher at 1 tadpole/L. Our findings demonstrate the feasibility of rearing boreal chorus frogs in captivity and provide guidelines for rearing this and similar species in a laboratory environment.
(© 2024 The Author(s). Zoo Biology published by Wiley Periodicals LLC.)
Databáze: MEDLINE
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