Effects of Various Natural Diets on Gonad Development, Roe Quality, and Intestinal Microbiota of the Purple Sea Urchin (Heliocidaris crassispina)

IF 3 2区 农林科学 Q1 FISHERIES
Zhiyuan Wang, Guodong Wang, Hui Ge, Lili Zhang
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Abstract

The study analyzed the impact of different diets on the gonadal development of sea urchin Heliocidaris crassispina. Kelp (Laminaria japonica), corn (Zea mays), carrots (Daucus carota), and sweet potatoes (Ipomaea batatas) were used to continuously feed adults of H. crassispina for 50 days. Results indicated that sea urchins fed with kelp had the highest weight gain rate (p < 0.05), followed by those fed with sweet potato, no significant difference in weight gain rate was observed between other diets and no feeding groups (p  > 0.05). H. crassispin fed with corn had a significantly enhancing GSI (gonadsomatic index) (p < 0.05), followed by those fed kelp, and no significant difference between the other diet groups, but their weight gain rate was higher than that of the no feeding group (p  > 0.05). While there was no significant difference in shell diameter and height in any diets (p  > 0.05). Sweet potatoes and corn significantly improved the redness (a) and yellowness (b) of the gonads (p < 0.05). Kelp group and corn group had excellent performance in amino acid composition, containing higher levels of umami and sweet amino acids than other groups (p < 0.05). Fatty acid analysis showed higher contents of eicosapentaenoic acid (EPA), arachidonic acid (ARA), linolenic acid, and linoleic acid in kelp and corn group. The types of diets significantly affected the microbial diversity of the digestive tract, with kelp enhancing microbial community diversity, and diets of corn and sweet potatoes increasing the abundance of Lactococcus. In conclusion, kelp was an excellent feed for H. crassispina, and corn as a preferred alternative diet not only improved the GSI but also optimized the gonad color and increased the content of amino acids and fatty acids.

Abstract Image

不同天然饲料对紫海胆(Heliocidaris crasspina)性腺发育、鱼子品质和肠道微生物群的影响
本研究分析了不同饲料对海胆(Heliocidaris crasspina)性腺发育的影响。采用海带(Laminaria japonica)、玉米(Zea mays)、胡萝卜(Daucus carota)和甘薯(Ipomaea batatas)连续饲养50 d。结果表明,以海带为食的海胆增重率最高(p <;0.05),其次是甘薯饲喂组,其他饲粮与未饲喂组的增重率差异不显著(p >;0.05)。玉米饲料显著提高了青花苜蓿的性腺指数(GSI) (p <;0.05),饲喂海带组次之,其他饲粮组间差异不显著,但增重率高于未饲喂组(p >;0.05)。不同日粮对壳直径和壳高的影响均不显著(p >;0.05)。甘薯和玉米显著改善了性腺的红度(a∗)和黄度(b∗)(p <;0.05)。海带组和玉米组在氨基酸组成上表现优异,鲜味和甜味氨基酸含量均高于其他各组(p <;0.05)。脂肪酸分析显示,海带和玉米组二十碳五烯酸(EPA)、花生四烯酸(ARA)、亚麻酸和亚油酸含量较高。饲粮类型显著影响消化道微生物多样性,海带提高了微生物群落多样性,玉米和红薯饲粮增加了乳球菌的丰度。综上所述,海带是一种优良的饲料,玉米作为首选替代饲粮不仅可以提高粗si,还可以优化性腺颜色,提高氨基酸和脂肪酸含量。
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来源期刊
Aquaculture Nutrition
Aquaculture Nutrition 农林科学-渔业
CiteScore
7.20
自引率
8.60%
发文量
131
审稿时长
3 months
期刊介绍: Aquaculture Nutrition is published on a bimonthly basis, providing a global perspective on the nutrition of all cultivated aquatic animals. Topics range from extensive aquaculture to laboratory studies of nutritional biochemistry and physiology. The Journal specifically seeks to improve our understanding of the nutrition of aquacultured species through the provision of an international forum for the presentation of reviews and original research papers. Aquaculture Nutrition publishes papers which strive to: increase basic knowledge of the nutrition of aquacultured species and elevate the standards of published aquaculture nutrition research. improve understanding of the relationships between nutrition and the environmental impact of aquaculture. increase understanding of the relationships between nutrition and processing, product quality, and the consumer. help aquaculturalists improve their management and understanding of the complex discipline of nutrition. help the aquaculture feed industry by providing a focus for relevant information, techniques, tools and concepts.
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