Large lutjanid and serranid fishes in tropical estuaries: Are they adults or juveniles?
Large lutjanid and serranid fishes in tropical estuaries: Are they adults or juveniles?
复制标题
热带河口的大型卢贾尼科鱼类和塞拉尼科鱼类：它们是成鱼还是幼鱼？
DOI：
10.3354/meps129031
复制
发表时间：
1995
影响因子：
2.5
通讯作者：
M. Sheaves
中科院分区：
文献类型：
--
作者：
M. Sheaves
两条锯齿鱼。Epinealus coioides和E. malabaricus和银斑笛鲷（Lutjanus argentimaculatus）、银斑笛鲷（L. russelli，常见于热带澳大利亚东北部的河口。文献综述表明，至少对于E。coioides、拟海鲶E. malabaricus和L. argentimaculatus，无论是青少年和成人发生在河口。我进行了目前的研究，以确定这4个物种的河口人口实际上包含成年人，或者如果他们完全由青少年。我收集了E。coioides、拟海鲶E.马拉巴里库斯L. russelli和L.产于澳大利亚东北部的河口。我比较了来自河口的鱼类的大小，年龄和生殖成熟度，从近海地区的同类鱼类。所有4个物种的河口种群似乎完全由生殖不成熟的鱼类。所有的鱼从河口拥有未成熟的性腺，和两个serranids（先雌先孕雌雄同体）都是女性。此外，所有来自河口的鱼都比来自近海的同类最大的鱼小得多，也年轻得多。这意味着河口是这些lutjanids和serranids的重要的少年发展的理由。
Two serranid fishes. Epinephelus coioides and E. malabaricus, and 2 lutjanid fishes, Lutjanus argentimaculatus and L. russelli, are common in estuaries of northeastern tropical Australia. Reviews of the literature suggest that, at least for E. coioides, E. malabaricus and L. argentimaculatus, both juveniles and adults occur in estuaries. I conducted the present study to determine if estuarine populations of these 4 species did in fact contain adults, or if they were comprised entirely of juveniles. I collected E. coioides, E. malabaricus, L. russelli and L. argentimaculatus from estuaries in northeastern Australia. I compared the size, age and reproductive maturity of fishes from estuaries to fishes of the same species from offshore areas. The estuarine populations of all 4 species seemed to consist entirely of reproductively immature fish. All fish from the estuaries possessed immature gonads, and for both serranids (protogynous hermaphrodites) all were females. Furthermore, all fish from the estuaries were much smaller and younger than the largest fish of the same species from offshore. This implies that estuaries are important juvenile development grounds for these lutjanids and serranids.