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Título: | Putative poison gland in the thorny catfish acanthodoras spinosissimus (Siluriformes: Doradidae) |
Título(s) alternativo(s): | Suposta glândula de veneno no bagre rebeca acanthodoras spinosissimus (Siluriformes: doradidae) |
Autor: | Zuanon, Jansen Alfredo Sampaio Birindelli, José Luís Olivan Py-Daniel, Lúcia H. Rapp Fernandes, Talles Romeu Colaço Sodré, Jefferson Gomes |
Palavras-chave: | Venom gland Freshwater |
Data do documento: | 2021 |
Revista: | Acta Amazonica |
É parte de: | Volume 51; Número 250 - 254. |
Abstract: | Acanthodoras is the only genus of catfish known to secrete a conspicuous and abundant milky-looking substance through an axillary pore located just below the base of the posterior cleithral process. Despite this remarkable feature, there is no published information on the anatomical structures that produce the secretion and its possible biological/ecological functions. Dissection and histological analysis of preserved specimens of A. spinosissimus revealed the presence of a saccular axillary gland with large, binuclear secretory cells, similar to those found in other poisonous catfish. Secretory cells near the lumen appear to lose nuclei and become filled with secretory products, possibly with proteinaceous elements, as indicated by their eosinophilic appearance. As far as we know, the saccular morphology of the gland appears to constitute a unique characteristic of Acanthodoras among Doradidae catfishes. Further studies are necessary to determine the chemical composition of the secretion, as well as its possible uses by the catfish in its natural environment. © 2021, Instituto Nacional de Pesquisas da Amazonia. All rights reserved. |
DOI: | 10.1590/1809-4392202101350 |
Aparece nas coleções: | Artigos IPUB |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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Putative.pdf | 61,64 kB | Adobe PDF | Visualizar/Abrir |
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