Unveiling the Impact of Rapeseed Meal on Feeding Behavior and Anorexigenic Endocrine in Litopenaeus vannamei

Author:

Zhou Bo1,Ran Hongmei2,Zhang Qijun2,Chen Hu2ORCID,Han Fenglu2,Xu Chang2ORCID,Zhao Qun2

Affiliation:

1. Fisheries Research Institute of Sichuan Academy of Agricultural Sciences, Yibin 644000, China

2. Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Hainan Aquaculture Breeding Engineering Research Center, School of Marine Biology and Fisheries, School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Haikou 570228, China

Abstract

Litopenaeus vannamei, with high plant protein acceptance and high global aquaculture production, is a potential species for rapeseed meal application. However, rapeseed meal has been associated with anorexia in fish, and whether the same occurs in L. vannamei remains unknown. This study demonstrated the effects of rapeseed meal on the feeding and anorexigenic endocrine of L. vannamei based on feeding behavior and transcriptomics. Soybean meal was replaced with fermented rapeseed meal (50%), and a significant increase in remaining diet and dietary discard was observed with a significant reduction in dietary visits. Transcriptome analysis revealed that the pathways involved in rapeseed meal-induced anorexia mainly included signal transduction, the digestive system, the sensory system, the endocrine system, phototransduction–fly, the thyroid hormone signaling pathway and pancreatic secretion. Moreover, this study further analyzed and identified seven neuropeptides involved in rapeseed meal-induced anorexia, and it explored the complex expression regulation strategies of these neuropeptides. In summary, this study confirmed through feeding behavior that rapeseed meal causes anorexia in L. vannamei, and it identified seven neuropeptides that were closely related to the anorexia process.

Funder

startup fund for scientific research of Hainan University

Hainan Provincial Natural Science Foundation of China

Publisher

MDPI AG

Subject

General Veterinary,Animal Science and Zoology

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