摘要
Increased sales of freshwater catfish fillet in global markets is causing high demand for quality fingerlings to be used in aquaculture production. Due to limited freshwater catfish broodstock availability, the gap between fingerling supply and demand drives the continuous need for improvement of production chain, including increased fertility and fecundity of broodstock. Recent technological advances support the possibility to increase hybrid catfish (Pangasius larnaudii x Pangasianodon hypophthalmus) broodstock reproductive parameters by adding small amounts of freshwater fish oil (FFO) to their diet. Catfish broodstock were fed with three different levels of FFO feed supplementation (0%, 1%, and 2% FFO) during the spawning (April-August) and post-spawning (September-December) season. Significant differences in weight gain and average daily growth were observed in fish fed with 1% FFO supplemented diet. Biomarkers of reproductive status in females (17 β-estradiol /E2; 1577 ± 5.26 pg/mL−1) and males (testosterone /T; 3.28 ± 0.41 ng/mL−1) fed with FFO supplements were significantly higher than the control (113.12 ± 43.33 pg/mL−1 and 2.56 ± 0.95 ng/mL−1), respectively). The oocytes and spermatocytes from fish fed with 1% and 2% FFO were in higher histological stages of maturity compared to control. Freshwater fish oil supplementation in fish feed during spawning season supported increased growth and enhanced reproduction indicators of hybrid catfish broodstock in aquaculture.
摘要译文
在全球市场中淡水鲶鱼片的销量增加导致对水产养殖生产中使用的优质鱼明的需求很大。由于淡水鲶鱼仁斯托克可用性有限，鱼种供需和需求之间的差距推动了生产链的改善需求，包括增加的生育率和育植物的繁殖力。最近的技术进步支持增加杂交鲶鱼（Pangasius Larnaudii x Pangasianianodon次疗法），通过向其饮食添加少量淡水鱼油（FFO）来增加杂种鲶鱼生殖参数。在产卵（8月至8月）和产卵后（9月至12月）季节，鲶鱼汤面饲喂三种不同水平的FFO饲料补充剂（0％，1％和2％FFO）。在饲喂1％FFO补充饮食的鱼类中观察到体重增加和平均日常生长的显着差异。雌性生殖状态的生物标志物（17β-雌二醇/ E 2; 1577±5.26 pg / ml -1 ）和男性（睾酮/ t; 3.28±0.41 ng / ml -1-sup>用ffo补充剂喂养的是显着高于对照（113.12±43.33pg / ml -1 -1和2.56±0.95 ng / ml < sup> -1 ）分别）。与对照相比，用1％和2％FFO供给的鱼类的卵母细胞和精子胶质细胞是成熟的更高的组织学阶段。在产卵季节期间鱼饲料中的淡水鱼油补充在水产养殖中杂交鲶鱼仁克罗德的增长增加和增强繁殖指标。
SupapornSattang[a];DoungpornAmornlerdpison[a];SudapornTongsiri[a];DušanPalić[b];KriangsakMengumphan[a];. Effect of freshwater fish oil feed supplementation on the reproductive condition and production parameters of hybrid catfish (Pangasius larnaudii x Pangasianodon hypophthalmus, Sauvage, 1878) broodstock - ScienceDirect[J]. Aquaculture Reports, 2021,20