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Provedor de dados:  Neotropical Ichthyology
País:  Brazil
Título:  Management proposal based on the timing of oral incubation of eggs and juveniles in the sentinel species Genidens genidens (Siluriformes: Ariidae) in a tropical estuary
Autores:  Maciel,Thaís Rodrigues
Vaz-dos-Santos,André Martins
Caramaschi,Erica Pellegrini
Vianna,Marcelo
Data:  2018-01-01
Ano:  2018
Palavras-chave:  Catfish
Fishery management
Guanabara Bay
Parental care
Reproductive strategy
Resumo:  ABSTRACT Ariids such as Genidens genidens are particularly susceptible to overfishing because of their complex reproductive mechanisms, which result in slow replenishment of stocks. In this study, we obtained data about the reproductive ecology of the catfish G. genidens in the Guanabara Bay estuary, Rio de Janeiro, Brazil, providing supporting information for management of its fishery. The sex ratio, mean size of each sex at first sexual maturation, and female fecundity were determined and the reproductive period was characterized. The males:females ratio was 1:2. The fecundity is low and increases proportionally to the females’ growth in total length and weight. The breeding season occurs during the warmest months of the year, with spawning extending from October through March and incubation from December through April. Sexual maturation is late, with males maturing at a larger size than females. Skipping spawning was also identified in females. Based on the reproductive biology, it is suggested that the catch be restricted to individuals larger than 20 cm, considering the L75 of the males, and that fishing be prohibited from December through March, to include the main period of spawning season by females and oropharyngeal incubation by males.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400208
Editor:  Sociedade Brasileira de Ictiologia
Relação:  10.1590/1982-0224-20170119
Formato:  text/html
Fonte:  Neotropical Ichthyology v.16 n.4 2018
Direitos:  info:eu-repo/semantics/openAccess
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