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Broodstock development, final oocyte maturation and breeding of the newly described sparid fish, Fanged seabream, Sparidentex jamalensis Amir, Siddiqui & Masroor, 2014
Aquaculture Research ( IF 2 ) Pub Date : 2022-04-07 , DOI: 10.1111/are.15862
P. P. Suresh Babu 1 , A. Anuraj 1 , Madathampady Shilta Thomas 2 , N. S. Jeena 3 , Praveen Narayan Dube 1 , K. Srinivasa Rao 1 , N. G. Vaidya 1 , S. M. Sonali 1 , Jayasree Loka 4 , K. Raghu Ramudu 1 , Joseph Imelda 3 , Achamveettil Gopalakrishnan 3
Affiliation  

Broodstock development, induced maturation and breeding of the newly described seabream, Sparidentex jamalensis collected from Kali estuary, Karnataka, India were achieved successfully for the first time. Taxonomy of the fish was confirmed employing morphological and molecular tools. Majority of the brooders collected were in the 20–30 cm length class (140–510 g) and were ideal for developing matured broodstock. Periodic microscopic observation of ovarian biopsy indicated progressive gonadal development in the broodstock. The broodstock developed for this protandrous hermaphrodite consisted of females having maturing oocytes and males with oozing milt during the breeding season. Final maturation and spawning of the females (520 ± 8 g; ova diameter above 400 µm) was achieved using cholesterol-based LHRH analogue pellets (50 µg/kg fish) and the males (450 ± 54 g) were not treated with hormones. Pelagic fertilized eggs (720 ± 8 µm) with a single oil globule were obtained with an absolute fecundity of 0.42 ± 0.06 million/kg fish and a fertilization rate of 82 ± 2.4%. Major embryological stages were recorded and the fertilized eggs hatched after 18–20 hours with 80 ± 4.6% hatching rate at 28°C. The newly hatched planktonic larvae measured 1.8 ± 0.12 mm in total length. Mouth opening of the larvae was observed on second day post hatch (dph). Resorption of the yolk sac was observed on third dph. These results will act as a baseline for developing a breeding programme for this species.

中文翻译:

亲鱼发育、最终卵母细胞成熟和新描述的刺鲀的繁殖,Fanged seabream, Sparidentex jamalensis Amir, Siddiqui & Masroor, 2014

新描述的海鲷Sparidentex jamalensis的亲鱼发育、诱导成熟和繁殖首次从印度卡纳塔克邦卡利河口采集成功。使用形态学和分子工具确认了鱼的分类。收集到的大多数育雏器的长度为 20-30 厘米(140-510 克),是培育成熟亲鱼的理想选择。卵巢活检的定期显微镜观察表明亲鱼的性腺进行性发育。为这种初生雌雄同体培育的亲鱼由具有成熟卵母细胞的雌性和在繁殖季节渗出鱼精的雄性组成。雌性的最终成熟和产卵(520 ± 8 g;卵子直径超过 400 µm)是使用基于胆固醇的 LHRH 类似物颗粒(50 µg/kg 鱼)实现的,雄性(450 ± 54 g)没有用激素处理。获得具有单个油球的远洋受精卵(720 ± 8 µm),绝对繁殖力为 0.42 ± 0.6 万/公斤鱼,受精率为 82 ± 2.4%。记录主要胚胎阶段,受精卵在 28°C 下 18-20 小时后孵化,孵化率为 80 ± 4.6%。新孵化的浮游幼虫总长度为 1.8 ± 0.12 毫米。孵化后第二天 (dph) 观察到幼虫张口。在第三天时观察到卵黄囊的吸收。这些结果将作为制定该物种育种计划的基准。新孵化的浮游幼虫总长度为 1.8 ± 0.12 毫米。孵化后第二天 (dph) 观察到幼虫张口。在第三天时观察到卵黄囊的吸收。这些结果将作为制定该物种育种计划的基准。新孵化的浮游幼虫总长度为 1.8 ± 0.12 毫米。孵化后第二天 (dph) 观察到幼虫张口。在第三天时观察到卵黄囊的吸收。这些结果将作为制定该物种育种计划的基准。
更新日期:2022-04-07
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