孟加拉Payra河支流bacaila Salmostoma(鲤科)种群生物学的季节变化

Q4 Environmental Science

Zoology and Ecology Pub Date : 2019-12-20 DOI:10.35513/21658005.2019.2.7

A. Ahamed, Faruque Ahmed Zoarder, J. Ohtomi

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引用次数: 1

摘要

研究了斑潜蛛的一些生物学参数，包括性别比、长频分布（LFDs）、性成熟时的大小、产卵季节、长重关系（LWRs）和条件因子。2017年6月至2018年5月，从佩拉河支流季节性采集样本。总体性别比与1:1的预期值有显著差异（p＜0.001），有利于男性标本。雌性明显大于雄性。性成熟时的体型估计为7.6～7.7厘米。性腺体指数（GSI）的季节变化表明，春季至夏季是主要的产卵季节。LWR在两性中均表现出负的异速生长，但具有明显的季节变化。富尔顿条件因子在两性中都存在差异，并归因于GSI随成熟度的变化。这项研究的结果将有助于管理和保护S.bacaila种群。

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Seasonal variations in the population biology of Salmostoma bacaila (Cyprinidae) from a tributary of the Payra River, Bangladesh

Some biological parameters of Salmostoma bacaila – including sex ratio, length-frequency distributions (LFDs), size at sexual maturity, spawning season, length-weight relationships (LWRs) and condition factor – were studied. Samples were collected seasonally during June 2017 to May 2018 from a tributary of the Payra River. The overall sex ratio was significantly different from the expected value of 1:1 (p < 0.001), in favour of male specimens. Females were significantly larger than males. Size at sexual maturity was estimated at 7.6~7.7 cm total length. Seasonal variations in the gonadosomatic index (GSI) indicate that the main spawning season is from spring to summer. The LWRs showed negative allometric growth in both sexes, but with clear seasonal variation. Fulton’s condition factor varied in both sexes and was attributed to variations in GSI with maturity. The fin¬dings of this study will be helpful for management and conservation of S. bacaila populations.

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来源期刊

Zoology and Ecology Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

1.00

自引率

0.00%

发文量