巴西东部亚马逊河马兰赫奥州Lençóis湾捕获的白口鱼Micropogonias furnieri (Desmarest, 1823)(放线鱼科:松花鱼科)的长重关系、条件因子和促性腺指数

Q2 Earth and Planetary Sciences

Brazilian Journal of Oceanography Pub Date : 2017-03-01 DOI:10.1590/S1679-87592017110506501

J. W. J. Azevedo, A. L. C. Castro, M. H. L. Silva

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引用次数: 5

摘要

白口黄花鱼Micropogonias furnieri是在巴西马拉尼昂州开采的，它加强了对该物种自然种群维护计划的需求，以协助管理这种开采资源。本研究的目的是描述其生殖特征(性腺指数和条件因子)以及体长分布和体重-体长关系。这些鱼是2010年6月至2011年7月在马拉尼昂州(亚马逊东部)的Lencois湾捕获的。共捕获570只(雄性318只，雌性252只)。两性之间在长度上存在差异，雌性比雄性大。性别比表明，雨季(第一学期)雌性数量较多，旱季(第二学期)雄性数量较多。体重-长度关系表现为两性负异速生长。条件因子的变化分析表明，较低的值与较高的促性腺指数值相吻合，该因子是该地区福氏分枝杆菌较好的繁殖指标。

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Length-weight relation, condition factor and gonadosomatic index of the whitemouth croaker, Micropogonias furnieri (Desmarest, 1823) (Actinopterygii: Sciaenidae), caught in Lençóis Bay, state of Maranhão, eastern Amazon, Brazil

The whitemouth croaker, Micropogonias furnieri, which is exploited off the state of Maranhao, Brazil, reinforces the need for maintenance programs of natural stocks of this species to assist in the management of this exploited resource. The aim of the present study was to describe aspects regarding its reproductive characteristics (gonadosomatic index and condition factor) and also the length distribution and weight-length relationships. The fish were caught in Lencois Bay in the state of Maranhao (eastern Amazon) between June 2010 and July 2011. A total of 570 individuals were caught (318 males and 252 females). Differences in length were found between the sexes, with females larger than males. The sex ratio indicated a tendency for females to be more abundant in the rainy season (first semester), whereas males predominated in the dry season (second semester). The weight-length relationship indicated negative allometric growth for both sexes. The analysis of the variation in the condition factor suggests that lower values coincided with higher gonadosomatic index values and that this factor is a good reproductive indicator for M. furnieri in the region.

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来源期刊

Brazilian Journal of Oceanography 地学-海洋学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Brazilian Journal of Oceanography covers the entire spectrum of disciplines within the science of oceanography, publishing articles dealing with the biological oceanography, physical oceanography, marine chemistry, sedimentology and geology, from coastal and estuarine waters out to the open sea. Emphasis is placed on inter-disciplinary process-oriented contributions. BJO also publishes issues dedicated to results of scientific meetings and of large inter-disciplinary studies or topical issues on specific subjects. The audience is composed by physical, chemical and biological oceanographers, marine sedimentologists, geologists and geochemists, marine biologists and ecologists. Papers sent to BJO must present results from original research and be written in english.