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
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
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DOI：
10.1590/s1679-87592007000300004
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发表时间：
2007-09-01
影响因子：
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通讯作者：
Souza, Ana Maria de
中科院分区：
文献类型：
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作者：
Bessa, Eduardo;Dias, June Ferraz;Souza, Ana Maria de
这项研究提供了Abudeduf saxatilis的繁殖数据，Abudeduf saxatilis是圣保罗州北部海岸的一种多岩石的海岸居民。使用书籍和诱饵共收集了73只个体。对它们进行了测量、称重和解剖，首先从宏观上分析了性别和成熟期，然后从微观上证实了部分材料。还进行了目测普查，以便在水下观察鸡蛋的存在。结果表明，该种群雌雄相当，第一次成熟期为全长101~115 mm，产卵期为11~2月份，变形性雄鱼为10~1月份。红星天牛的繁殖期与气温和温度幅度呈正相关，但最有可能影响这一节律的环境线索是光周期。对雄性守卵者进行目视普查的横断面也是发现这些底层守卵者物种生殖期的可靠工具。
This study presents data on the reproduction of Abudefduf saxatilis, a rocky shore inhabitant at the northern coast of Sao Paulo State. A total of 73 individuals were collected using books 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 10 1 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.