渔业研究2025，Vol.47Issue(4)：500-507,8.DOI:10.14012/j.jfr.2025017
养殖密度对马口鱼卵巢发育的影响
Repercussions of stocking density on ovarian development in Opsariichthys bidens
摘要
Abstract
[Background]Opsariichthys bidens is an economic fish species with great potential for develop-ment in freshwater aquaculture in China,with delicious meat and strong adaptability,but the efficiency of artifi-cial breeding is limited by the level of ovarian development of parental O.bidens.[Objective]The aim of the present study is to investigate the effect of stocking density on the ovarian development of parental O.bidens.[Methods]Parental O.bidens of the same specification and healthy physique were selected and randomly di-vided into four density gradients:a low density group(M1,2 kg/m3),a medium density group(M2,4 kg/m3),and two high density groups(M3,6 kg/m3 and M4,8 kg/m3)for cultivation,and the experimental cycle was 45 d.The ovarian sections of ovaries were observed and counted to calculate the gonadal index(GSI)and the propor-tion of phases of ovarian development to stage Ⅳ(F);the contents of conventional nutrient fractions such as moisture,crude protein,crude fat,crude ash,phosphorus and calcium of the ovaries were determined;and stat-istics analysis on the induced spawning rate,hatching rate and fertilization rate were carried out.[Results]The results showed that the gonadal index of the medium density group(13.35±1.97)％was significantly higher than those of the other density groups(P＜0.05);and the phases of ovarian development to stage Ⅳ in the medium density group was(46.62±3.20)％,which was significantly different from that of the other groups(P＜0.05).Regarding the conventional nutrient composition of the ovaries,the moisture content of the ovaries of the O.bidens in the medium density group was significantly lower(P＜0.05)and the crude fat content was signific-antly higher(P＜0.05),while the differences in the contents of crude protein,crude ash,calcium,and phosphor-us were not significant(P＞0.05).In terms of fecundity,the medium density group had significantly(P＜0.05)higher induced spawning rate(93.30±3.30)％and hatching rate(81.40±4.00)％than those of the other density groups,and had the optimum fertilization rate.[Conclusion]The above results indicate that reasonable stock-ing density can improve the level of ovarian development of parental O.bidens to a certain extent.关键词
马口鱼(Opsariichthys bidens)/养殖密度/卵巢发育/繁殖力Key words
Opsariichthys bidens/stocking density/ovarian development/fecundity分类
农业科技引用本文复制引用
陈家乐,陈度煌,李文盛,薛凌展,吴妹英,吴斌,黄文树..养殖密度对马口鱼卵巢发育的影响[J].渔业研究,2025,47(4):500-507,8.基金项目
福建省种业创新和产业化工程项目(2021FJSCZY04) （2021FJSCZY04）
福建省属公益类科研院所基本科研专项(2022R1014004) （2022R1014004）
