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1 April 2013 Potential for Bias in Using Hybrids Between Common Carp (Cyprinus carpio) and Goldfish (Carassius auratus) in Endocrine Studies: A First Report of Hybrids in Lake Mead, Nevada, U.S.A
Steven L. Goodbred
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Abstract

During a 2008 study to assess endocrine and reproductive health of common carp (Cyprinus carpio) in Lake Mead, Nevada (U.S.A.) we identified two fish, one male and one female, as hybrids with goldfish (Carassius auratus) based on morphology, lateral line scale count, and lack of anterior barbels. Gross examination of the female hybrid ovaries indicated presence of vitellogenic ovarian follicles; whereas histological evaluation of the male hybrid testes showed lobule-like structures with open lumens but without germ cells, suggesting it was sterile. Because common carp/goldfish hybrids are more susceptible to gonadal tumors and may have different endocrine profiles than common carp, researchers using common carp as a model for endocrine/reproductive studies should be aware of the possible presence of hybrids.

2013, American Midland Naturalist
Steven L. Goodbred "Potential for Bias in Using Hybrids Between Common Carp (Cyprinus carpio) and Goldfish (Carassius auratus) in Endocrine Studies: A First Report of Hybrids in Lake Mead, Nevada, U.S.A," The American Midland Naturalist 169(2), 426-431, (1 April 2013). https://doi.org/10.1674/0003-0031-169.2.426
Received: 4 May 2012; Accepted: 1 July 2012; Published: 1 April 2013
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