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Regression of dark color in subterranean fishes involves multiple mechanisms: response to hormones and neurotransmitters Neotropical Ichthyology
Grempel,Renato Grotta; Trajano,Eleonora; Visconti,Maria Aparecida.
ABSTRACT Organisms with source-populations restricted to the subterranean biotope (troglobites) are excellent models for comparative evolutionary studies, due to their specialization to permanent absence of light. Eye and dark pigment regression are characteristics of most troglobites. In spite of the advance in knowledge on the mechanisms behind eye regression in cave fishes, very little is known about pigmentation changes. Studies were focused on three species of the genus Pimelodella. Exemplars of the troglobitic P. spelaea and P. kronei were compared with the epigean (surface) P. transitoria, putative sister-species of the latter. Melanophore areas and densities are significantly lower in the troglobitic species. Evaluating the in vitro response of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adrenaline; Melanin Concentrating Hormone; Melanophores; Physiology of Pigmentation; Troglobitic Fish.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200214
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