Abstract

Chthonerpeton indistinctum is nontropical, and reports suggest a distinct breeding season, allowing the potential for estimation of reproductive success. A total of 67 juvenile (and four adult) C. indistinctum were captured over five visits to a site in Rio Grande do Sul, Brazil, during Winter 2001. All individuals were marked and released, and the seven juveniles recaptured allowed a Schnabel estimate of 161.0 (95% confidence limits 81.9-343.1), the first quantitive estimate of juvenile caecilian abundance. How- ever, the large size range of juveniles caught suggests that growth rates of individuals are highly variable or that C. indistinctum does not have a distinct breeding period in this region.

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