Oreochromis杂交种的生长性能、性别比、饲料利用率和存活率

IF 1.3 Q3 FISHERIES

Journal of Applied Aquaculture Pub Date : 2021-08-03 DOI:10.1080/10454438.2021.1943594

Elysee Nzohabonayo, J. Kang’ombe, J. Manyala, D. Kassam

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引用次数: 0

摘要

摘要采用双列3 × 3杂交方法，对karongae、O. shiranus和O. mossambicus的生长性能进行了研究。以5鱼m−2的速度放养9个处理，放养量为3.47±0.04 g，重复2次。不同处理间的末重差异显著(P < 0.05)，其中雌、雄杂交的末重(48.48±0.58 g)高于其他杂交。雌性卡龙藻杂交种的AFCR值较低(P < 0.05)，表现较好(P < 0.05)。杂交种的雄性比例在65% ~ 90%之间;存活率从62.5%到100%不等。与雌性杂交的杂种优势值在10.72 ~ 33.25之间。结果表明，与雌性杂交的杂交种具有大多数生产性能性状的优势，可能是商业养鱼的合适选择。

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Growth performance, sex ratio, feed utilization, and survival of Oreochromis hybrids

ABSTRACT An experiment was conducted to evaluate the growth performance of hybrids from a diallel 3 × 3 crossing of Oreochromis karongae, O. shiranus, and O. mossambicus. Fingerlings of 3.47 ± 0.04 g were stocked at 5 fish m−2 in nine treatments replicated twice. Final weights were significantly different (P < 0.05) among treatments whereby hybrids from female O. karongae and male O. mossambicus registered higher values (48.48 ± 0.58 g) than other crosses. Hybrids from female O. karongae significantly (P < 0.05) performed well in terms of AFCR as they registered lower values (<2). The proportion of males varied between 65% and 90% in hybrids; survival ranged from 62.5% to 100%. Heterosis in hybrids from crosses with female O. karongae ranged from10.72 to 33.25. The results suggest that hybrids from crosses with female O. karongae may be suitable candidates for commercial fish farming as they have superiority of the most productive performance traits.

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来源期刊

Journal of Applied Aquaculture Environmental Science-Ecology

CiteScore

3.20

自引率

0.00%

发文量

期刊介绍： The Journal of Applied Aquaculture is a platform for the sharing of practical information needed by researchers to meet the needs of investors, farm managers, extension agents and policy makers working to adapt aquaculture theory to achieve economic and food security objectives in the real world. The journal emphasizes multi-disciplinary research and case studies that propose financially and logistically viable solutions to observable problems.