Reproductive patterns of blacktail comber (Serranus atricauda, Serranidae) from south-west Portugal seamounts

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• 作者：Ana Neves (1)
  Vera Sequeira (1)
  Rafaela Barros Paiva (1) (2)
  Ana Rita Vieira (1) (2)
  Leonel Serrano Gordo (1) (2)
  
• 关键词：Reproductive strategy ; Indeterminate fecundity ; Serranus atricauda ; Seamounts ; Portugal
• 刊名：Helgoland Marine Research
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：68
• 期：1
• 页码：133-142
• 全文大小：1,128 KB
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• 作者单位：Ana Neves (1)
  Vera Sequeira (1)
  Rafaela Barros Paiva (1) (2)
  Ana Rita Vieira (1) (2)
  Leonel Serrano Gordo (1) (2)
  
  1. Centro de Oceanografia, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal
  2. Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal
  
• ISSN：1438-3888

文摘

The knowledge of the reproductive strategy is essential for the comprehensive understanding of the population dynamics of any fish species. This study intends to define the spawning season, verify the type of fecundity regulation and estimate relative annual fecundity for Serranus atricauda inhabiting the south-west of Portugal seamounts (Gorringe, Ampère and Lion). Monthly samples, between September 2010 and December 2011, were obtained from commercial vessels. This species is synchronously hermaphroditic, and mature individuals were found all year round, with gonadosomatic index peak from February to September. No clear relation between hepatosomatic index and Fulton’s condition factor and gonadal development was found, and therefore, it is probable that reproductive success depends more on environmental conditions and food availability during the spawning season than on body energy reserves. No gap exists between pre-vitellogenic and vitellogenic oocytes and the oocyte size-frequency distribution during the main spawning season show no dominant cohort progressing through time. The number of standing stock of advanced vitellogenic oocytes showed an increase trend along the spawning season decreasing only at its end and the relative intensity of α-atresia was always low throughout this period with an increase towards the end. All these criteria corroborate the indeterminate fecundity type assigned to S. atricauda in previous studies. Mean relative annual fecundity estimated was 5,655?±?4,321 oocytes per gram of gutted weight.