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	Provedor de dados Neotropical Ichthyology (2) Autor Grempel,Renato Grotta (2) Ilarri,Martina Di Iulio (1) Medeiros,Paulo Roberto de (1) Rosa,Ierecê Maria de Lucena (1) Souza,Allan Tainá de (1) Trajano,Eleonora (1) Visconti,Maria Aparecida (1) Mais... Palavra-chave Abudefduf saxatilis (1) Adrenaline (1) Fish behavior (1) Human impact (1) Melanin Concentrating Hormone (1) Melanophores (1) Northeastern Brazil (1) Physiology of Pigmentation (1) Tourism (1) Troglobitic Fish (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2020 (1) 2008 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Effects of tourist visitation and supplementary feeding on fish assemblage composition on a tropical reef in the Southwestern Atlantic Neotropical Ichthyology Ilarri,Martina Di Iulio; Souza,Allan Tainá de; Medeiros,Paulo Roberto de; Grempel,Renato Grotta; Rosa,Ierecê Maria de Lucena. The effects of tourist visitation and food provisioning on fish assemblages were assessed by visual censuses (stationary technique) carried out in a tropical reef in Northeastern Brazil. Comparisons of species abundance, richness, equitability, and trophic structure in the presence (PT) and absence (AT) of tourists suggest that tourist visitation and supplementary food influenced the structure of the fish assemblage, as follows: (a) diversity, equitability and species richness were significantly higher on the AT period, while the abundance of a particular species was significantly higher during PT; (b) trophic structure differed between the AT and PT periods, omnivores being more abundant during the latter period, while mobile invertivores, piscivores,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish behavior; Tourism; Human impact; Northeastern Brazil; Abudefduf saxatilis. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400014 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 Registros recuperados: 2 Primeira ... 1 ... Última

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