Effect of temperature on embryonic development and offspring performance of the African river prawn, Macrobrachium vollenhovenii

IF 1.1 4区 环境科学与生态学 Q3 MARINE & FRESHWATER BIOLOGY African Journal of Aquatic Science Pub Date : 2023-07-03 DOI:10.2989/16085914.2023.2232411
Judith G Makombu, Cynthia A Bih, G. Nkongho, P. M. Oben, Rollins N Ndi, Clovis N Chombe, Mercy B Verkijika, Gerry K Sonkeng, Tekou Guegang, Janet H Brown
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Abstract

Macrobrachium vollenhovenii (Herklots, 1857), the largest of the indigenous West African Palaemonidae prawns, has a high potential for aquaculture. This work was carried out to assess the effect of temperature on embryonic development and offspring quality of this species. In the phase one experiment, females at stage V of gonadal development incubated their eggs at three experimental temperatures and their embryonic development was evaluated. Seven embryonic developmental stages were observed: fertilisation, mitosis, morula, blastula, gastrula, nauplius and larvae. The incubation periods were 19, 14 and 13 days at 26 °C, 28 °C and 30 °C, respectively. A temperature of 30 °C resulted in higher broodstock mortality (33.33%). In phase two, larvae were reared at the respective temperatures for 30 days at a stocking density of 30 larvae per litre of water. Offspring quality was significantly different between treatments from day five onwards, with the fastest development at 30 °C followed by 28 °C. However, larval survival rate was significantly higher at 26 °C (31.7%) followed by 28 °C (27.6%). A temperature of 28 °C could therefore be recommended as the most favourable for embryonic development and larviculture of M. vollenhovenii. These findings will help bridge the knowledge gap with respect to captive breeding and hatchery technology for M. vollenhovenii.
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温度对非洲对虾胚胎发育和后代表现的影响
大龙虾(Macrobrachium vollenhovenii)(Herklots,1857 年)是西非本地对虾中最大的一种,具有很高的水产养殖潜力。这项工作旨在评估温度对该物种胚胎发育和后代质量的影响。在第一阶段实验中,处于性腺发育第五阶段的雌性对虾在三种实验温度下孵卵,并对其胚胎发育进行评估。共观察了七个胚胎发育阶段:受精、有丝分裂、蜕膜、胚泡、胚乳、稚鱼和幼虫。在 26 °C、28 °C 和 30 °C下的孵化期分别为 19 天、14 天和 13 天。温度为 30 °C时,鱼苗死亡率较高(33.33%)。在第二阶段,幼体在相应温度下饲养 30 天,放养密度为每升水 30 尾幼体。从第五天开始,不同处理的后代质量有明显差异,30 °C下发育最快,其次是28 °C。然而,幼虫存活率在 26 °C(31.7%)和 28 °C(27.6%)条件下明显较高。因此,28 °C是最适合伏牛花鳉胚胎发育和幼虫养殖的温度。这些发现将有助于弥补人工繁殖和孵化技术方面的知识差距。
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来源期刊
African Journal of Aquatic Science
African Journal of Aquatic Science MARINE & FRESHWATER BIOLOGY-
CiteScore
3.90
自引率
7.10%
发文量
31
审稿时长
>12 weeks
期刊介绍: The African Journal of Aquatic Science is an international journal devoted to the study of the aquatic sciences, covering all African inland and estuarine waters. The Journal publishes peer-reviewed original scientific papers and short articles in all the aquatic science fields including limnology, hydrobiology, ecology, conservation, biomonitoring, management, water quality, ecotoxicology, biological interactions, physical properties and human impacts on African aquatic systems.
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