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Anatomy and histology of secondary sexual characters, gonads and liver of the rock-pool blenny, Parablennius sanguinolentus parvicornis (Pisces: Blenniidae) of the Azores
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Abstract(s)
Neste artigo descrevo os órgãos reprodutores de Parablennius sanguinolentus parvicornis, peixe que habita as poças rochosas do estrato entre-marés dos Açores. Esta espécie apresenta tácticas alternativas de acasalamento. São considerados e descritos oito estádios de desenvolvimento dos oócitos (mais um estádio degenerativo). O desenvolvimento dos ovários é classificado em seis estádios. Os ovários, no mês anterior ao início da postura, contêm, conforme o tamanho das fêmeas, entre 4000 e 41000 oócitos em diferentes estádios de desenvolvimento. O processo de maturação das gónadas dos machos é classificado em oito estádios. São ilustradas, através de preparações histológicas, as variações sazonais do desenvolvimento das gónadas. A histologia hepática mostra que o fígado desempenha um importante papel como reservatório energético. As reservas lipídicas, acumuladas durante o Inverno e Primavera são gastas durante a curta estação de reprodução.
ABSTRACT: The main histologic aspects of the reproductive organs of Parablennius sanguinolentus parvicornis, a rocky intertidal pool fish of the Azores with alternative life history tactics, are described and illustrated. Eight stages of oocyte development (plus atretic ones) are considered. The development of the ovaries is classified into 6 stages. Ovaries may contain, according to female size, from 4000 up to 41000 oocytes in the month which preceeds the reproductive season. Gonad maturation of the males is assigned to 8 stages. Seasonal variations of gonad histology, of both males and females, are illustrated. Histology of the livers shows that they play an important role in the storage of energy. Lipidic reserves are used while the breeding season progresses.
ABSTRACT: The main histologic aspects of the reproductive organs of Parablennius sanguinolentus parvicornis, a rocky intertidal pool fish of the Azores with alternative life history tactics, are described and illustrated. Eight stages of oocyte development (plus atretic ones) are considered. The development of the ovaries is classified into 6 stages. Ovaries may contain, according to female size, from 4000 up to 41000 oocytes in the month which preceeds the reproductive season. Gonad maturation of the males is assigned to 8 stages. Seasonal variations of gonad histology, of both males and females, are illustrated. Histology of the livers shows that they play an important role in the storage of energy. Lipidic reserves are used while the breeding season progresses.
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Keywords
Parablennius sanguinolentus parvicornis Caboz-das-Poças Açores Rock-pool Blenny Azores
Citation
"ARQUIPÉLAGO. Ciências Biológicas e Marinhas = Life and Marine Sciences". ISSN 0870-6581. Nº 13A (1995): 21-38.