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首页> 外文期刊>aquaculture research >Reproductive strategies of two cyprinid fishes in Lake Malawi and their relevance for aquaculture development
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Reproductive strategies of two cyprinid fishes in Lake Malawi and their relevance for aquaculture development

机译:马拉维湖两种鲤科鱼类的繁殖策略及其与水产养殖发展的相关性

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Abstract.A comparative study of ‘mpasa’,Opsardium microlepis(Günther), and ‘ntchila’,Labeo mesopsGünther, was made with regard to spawning strategy. While fractional spawning was routinely observed in mpasa, total spawning of ntchila suggests a less efficient survival strategy. Ova and oocyte counts varied from 34510 to 65657 in mpasa of 54‐57.7cm total length and were numerically higher than those observed in ntchila, which ranged from 10479 to 47957 in 19‐29.3cm fish. Gonadosomatic indices were 3.75 to 10.97 for the former and 9.66 to 16.09 for the latter fish. Because of the breeding behaviour, broodstock and hatchery management is easier with ntchila than with mpasa. This could be a basis for a culture‐based fishery which has so far been unexplored in Malawian waters. Possibilities for enhancement of the two fisheries are alluded to in light of
机译:摘要:对'mpasa'(Opsardium microlepis,Günther)和'ntchila'(Labeo mesopsGünther)的产卵策略进行了比较研究。虽然在 mpasa 中经常观察到部分产卵,但 ntchila 的总产卵表明生存策略效率较低。在总长度为54-57.7厘米的鱼中,卵子和卵母细胞计数从34510到65657不等,在数值上高于在ntchila中观察到的卵子和卵母细胞计数,在19-29.3cm鱼中从10479到47957不等。前者为3.75至10.97,后者为9.66至16.09。由于育种行为,使用ntchila比使用mpasa更容易管理亲鱼和孵化场。这可能是以文化为基础的渔业的基础,迄今为止,马拉维水域尚未开发。鉴于以下情况,提到了加强这两个渔业的可能性

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