REPRODUCTION ASPECTS OF COBIA CAUGHT IN PERNAMBUCO COAST, NORTHEASTERN BRAZIL

IF 0.5 4区农林科学 Q4 FISHERIES

Boletim do Instituto de Pesca Pub Date : 2021-08-24 DOI:10.20950/1678-2305/bip.2021.47.e636

S. Hamilton, E. C. Domingues, Ronaldo Barradas PEREGRINO JÚNIOR, M. Rêgo, F. Hazin, W. Severi

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引用次数: 1

Abstract

Aspects of the reproduction of cobia (Rachycentron canadum) population from the coast of Pernambuco State, Northeastern Brazil, were studied from February 2004 to August 2006. One hundred eleven individuals were analyzed: 54 females with fork length (FL) ranging from 40 to 137 cm (mean ± standard deviation: 90.7 ± 18.1 cm) and 57 males with FL from 43 to 114.5 cm (82.4 ± 17.0 cm). Histological analysis was used to identify maturational phases. Spawning capable females were found from August to May, except in December, while mature males were present throughout the year, except in July. Size at first maturity (L50) obtained by Bayesian analysis was 72.51 cm FL for females and 60.69 cm FL for males. Overall batch fecundity ranged from 192,063 to 1,600,513 oocytes (722,398 ± 430,911) and mean relative batch fecundity ranged from 32.9 to 104.8 (71.1 ± 29.8) oocytes per gram of female body weight. The data indicate that the reproduction of cobia off the coast of Pernambuco occurs throughout the year, but with peaks between February and April, period in which gonadosomatic indices reach the maximum values and then decrease until May for females and males.

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在巴西东北部伯南布哥海岸捕获的蛇的繁殖方面

2004年2月至2006年8月，对巴西东北部伯南布哥州海岸的cobia (Rachycentron canadum)种群的繁殖进行了研究。共分析了111只个体，其中雌性54只，叉长在40 ~ 137 cm之间(平均±标准差:90.7±18.1 cm)，雄性57只，叉长在43 ~ 114.5 cm之间(82.4±17.0 cm)。组织学分析用于鉴定成熟阶段。除12月外，有产卵能力的雌鱼于8月至5月产卵;除7月外，成年雄鱼全年均有产卵。经贝叶斯分析，雌虫初成熟大小(L50)为72.51 cm FL，雄虫为60.69 cm FL。总批次产卵量为192,063 ~ 1,600,513个卵母细胞(722,398±430,911)，平均相对批次产卵量为32.9 ~ 104.8(71.1±29.8)个卵母细胞/克雌性体重。研究结果表明，伯南布哥海岸外的军曹鱼全年都有繁殖，但在2 - 4月达到繁殖高峰，雌、雄的性腺指数在此期间达到最大值，然后逐渐下降，直到5月。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Boletim do Instituto de Pesca FISHERIES-ZOOLOGY

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： To publish original articles of research and short communications in the following áreas: Fisheries, Aquaculture, Zootechnology, Limnology, Oceanography, Biology and Pathology of aquatic organisms. The publication depends on the approval of the Editorial Board, based on the peer review.