Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil
This study presents data on the reproduction of Abudefduf saxatilis, a rocky shore inhabitant at the northern coast of São Paulo State. A total of 73 individuals were collected using hooks and baits. They were measured, weighed and dissected, sex and maturation stage were analysed, first macroscopic...
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2007-09-01
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| Series: | Brazilian Journal of Oceanography |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592007000300004 |
| _version_ | 1811261730379005952 |
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| author | Eduardo Bessa June Ferraz Dias Ana Maria de Souza |
| author_facet | Eduardo Bessa June Ferraz Dias Ana Maria de Souza |
| author_sort | Eduardo Bessa |
| collection | DOAJ |
| description | This study presents data on the reproduction of Abudefduf saxatilis, a rocky shore inhabitant at the northern coast of São Paulo State. A total of 73 individuals were collected using hooks and baits. They were measured, weighed and dissected, sex and maturation stage were analysed, first macroscopically, then part of the material was taken for microscopical confirmation. Visual censuses were also done for underwater observation of egg's presence. Results showed equivalence of males and females in the population, first maturation occurring between 101 and 115mm of total length, spawning period occurs from November to February for Abudefduf saxatilis and October to January for Stegastes variabilis. Reproductive period for A. saxatilis was positively related to air temperature and thermic amplitude, but the environmental clue most likely to influence this rhythm is photoperiod. Transects with visual census of males guarding eggs were also a reliable tool for finding reproductive period in these demersal, egg-guarder species.<br>Esse estudo apresenta dados sobre a reprodução de Abudefduf saxatilis, uma espécie habitante de costões rochosos no litoral norte do estado de São Paulo. Os peixes foram coletados com anzol e isca num total de 73 indivíduos, foram medidos, pesados, dissecados, seu sexo e maturidade gonadal foram analisados, primeiro macroscopicamente, depois parte desse material foi levado para confirmação microscópica. Censos visuais também foram feitos para observar a presença de ovos. Os resultados apontam para uma equivalência entre o número de machos e fêmeas na população, a primeira maturação ocorre entre 101 e 115 mm de comprimento total, a desova ocorre entre os meses de novembro a fevereiro em Abudefduf saxatilis e outubro a janeiro em Stegastes variabilis. O período reprodutivo de A. saxatilis está positivamente relacionado à temperatura do ar e amplitude térmica, mas o indicador ambiental mais provável de influenciar o ritmo reprodutivo é o fotoperíodo. Os censos visuais feitos com a transecção mostraram-se uma ferramenta confiável para encontrar o período de desova nessas espécies demersais que guardam seus ovos. |
| first_indexed | 2024-04-12T19:11:02Z |
| format | Article |
| id | doaj.art-432c974205474410aaef2a9a1c307d8a |
| institution | Directory Open Access Journal |
| issn | 1679-8759 1982-436X |
| language | English |
| last_indexed | 2024-04-12T19:11:02Z |
| publishDate | 2007-09-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Brazilian Journal of Oceanography |
| spelling | doaj.art-432c974205474410aaef2a9a1c307d8a2022-12-22T03:19:52ZengUniversidade de São PauloBrazilian Journal of Oceanography1679-87591982-436X2007-09-0155319920610.1590/S1679-87592007000300004Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, BrazilEduardo BessaJune Ferraz DiasAna Maria de SouzaThis study presents data on the reproduction of Abudefduf saxatilis, a rocky shore inhabitant at the northern coast of São Paulo State. A total of 73 individuals were collected using hooks and baits. They were measured, weighed and dissected, sex and maturation stage were analysed, first macroscopically, then part of the material was taken for microscopical confirmation. Visual censuses were also done for underwater observation of egg's presence. Results showed equivalence of males and females in the population, first maturation occurring between 101 and 115mm of total length, spawning period occurs from November to February for Abudefduf saxatilis and October to January for Stegastes variabilis. Reproductive period for A. saxatilis was positively related to air temperature and thermic amplitude, but the environmental clue most likely to influence this rhythm is photoperiod. Transects with visual census of males guarding eggs were also a reliable tool for finding reproductive period in these demersal, egg-guarder species.<br>Esse estudo apresenta dados sobre a reprodução de Abudefduf saxatilis, uma espécie habitante de costões rochosos no litoral norte do estado de São Paulo. Os peixes foram coletados com anzol e isca num total de 73 indivíduos, foram medidos, pesados, dissecados, seu sexo e maturidade gonadal foram analisados, primeiro macroscopicamente, depois parte desse material foi levado para confirmação microscópica. Censos visuais também foram feitos para observar a presença de ovos. Os resultados apontam para uma equivalência entre o número de machos e fêmeas na população, a primeira maturação ocorre entre 101 e 115 mm de comprimento total, a desova ocorre entre os meses de novembro a fevereiro em Abudefduf saxatilis e outubro a janeiro em Stegastes variabilis. O período reprodutivo de A. saxatilis está positivamente relacionado à temperatura do ar e amplitude térmica, mas o indicador ambiental mais provável de influenciar o ritmo reprodutivo é o fotoperíodo. Os censos visuais feitos com a transecção mostraram-se uma ferramenta confiável para encontrar o período de desova nessas espécies demersais que guardam seus ovos.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592007000300004PomacentrídiosDonzelaPeríodo reprodutivoCensu visualSão Sebastião-SPSargentoPomacentridDamselfishReproductive periodVisual censusReproductionSão SebastiãoSergeant major |
| spellingShingle | Eduardo Bessa June Ferraz Dias Ana Maria de Souza Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil Brazilian Journal of Oceanography Pomacentrídios Donzela Período reprodutivo Censu visual São Sebastião-SP Sargento Pomacentrid Damselfish Reproductive period Visual census Reproduction São Sebastião Sergeant major |
| title | Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil |
| title_full | Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil |
| title_fullStr | Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil |
| title_full_unstemmed | Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil |
| title_short | Rare data on a rocky shore fish reproductive biology: sex ratio, length of first maturation and spawning period of Abudefduf saxatilis (Linnaeus, 1758) with notes on Stegastes variabilis spawning period (Perciformes: Pomacentridae) in São Paulo, Brazil |
| title_sort | rare data on a rocky shore fish reproductive biology sex ratio length of first maturation and spawning period of abudefduf saxatilis linnaeus 1758 with notes on stegastes variabilis spawning period perciformes pomacentridae in sao paulo brazil |
| topic | Pomacentrídios Donzela Período reprodutivo Censu visual São Sebastião-SP Sargento Pomacentrid Damselfish Reproductive period Visual census Reproduction São Sebastião Sergeant major |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-87592007000300004 |
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