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Out-of-season spawning of largemouth bass in a controllable recirculating system

Largemouth bass (LMB) production exceeded 0.7 million tons in 2021 and has become one of the most important freshwater aquaculture species in China. The stable and fixed culture cycle led to regular and drastic price fluctuation during the past decade. Strong price fluctuation provides opportunities...

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Autores principales: Hu, Chen-Hao, Bie, Han-Qing, Lu, Zi-Yi, Ding, Yang, Guan, He-He, Geng, Long-Hui, Ma, Shuai, Hu, Yuan-Xiang, Fan, Qi-Xue, Shen, Zhi-Gang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10164978/
https://www.ncbi.nlm.nih.gov/pubmed/37168230
http://dx.doi.org/10.3389/fphys.2023.1175075
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author Hu, Chen-Hao
Bie, Han-Qing
Lu, Zi-Yi
Ding, Yang
Guan, He-He
Geng, Long-Hui
Ma, Shuai
Hu, Yuan-Xiang
Fan, Qi-Xue
Shen, Zhi-Gang
author_facet Hu, Chen-Hao
Bie, Han-Qing
Lu, Zi-Yi
Ding, Yang
Guan, He-He
Geng, Long-Hui
Ma, Shuai
Hu, Yuan-Xiang
Fan, Qi-Xue
Shen, Zhi-Gang
author_sort Hu, Chen-Hao
collection PubMed
description Largemouth bass (LMB) production exceeded 0.7 million tons in 2021 and has become one of the most important freshwater aquaculture species in China. The stable and fixed culture cycle led to regular and drastic price fluctuation during the past decade. Strong price fluctuation provides opportunities and challenges for the LMB industry, and out-of-season spawning (OSS) and culture will provide technical support for the opportunities. To induce OSS at a low cost, we established a controllable recirculating system that allows precise thermo-photoperiod manipulation. In the system, four experimental groups were assigned, 18NP (18°C overwintering water temperature, natural photoperiod), 18CP (18°C overwintering water temperature, controlled photoperiod), 16CP (16°C overwintering water temperature, controlled photoperiod), and NTNP (natural water temperature and natural photoperiod), to determine the effects of chilling temperature and photoperiod on spawning performance. OSS was observed in all the experimental groups without significant differences, except NTNP. The manipulated broodstock can re-spawn 3 months later in the next spring in advance. Further analysis of the volume percentage of different stages of oocytes provides a base for excellent regression between the volume percentage of the primary growth stage, cortical alveoli stage, vitellogenesis/maturation stage, and gonadal development/maturation. The results suggest that the volume percentage of oocytes is a better indicator of gonadal development and maturation than the gonadosomatic index. We also found that LMB prefers palm fiber as a spawning nest over gravel. The findings of this work provide important technique guidance for practical OSS of the LMB aquaculture industry and standardization of ovary development and maturation in fish with asynchronous developmental oocytes.
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spelling pubmed-101649782023-05-09 Out-of-season spawning of largemouth bass in a controllable recirculating system Hu, Chen-Hao Bie, Han-Qing Lu, Zi-Yi Ding, Yang Guan, He-He Geng, Long-Hui Ma, Shuai Hu, Yuan-Xiang Fan, Qi-Xue Shen, Zhi-Gang Front Physiol Physiology Largemouth bass (LMB) production exceeded 0.7 million tons in 2021 and has become one of the most important freshwater aquaculture species in China. The stable and fixed culture cycle led to regular and drastic price fluctuation during the past decade. Strong price fluctuation provides opportunities and challenges for the LMB industry, and out-of-season spawning (OSS) and culture will provide technical support for the opportunities. To induce OSS at a low cost, we established a controllable recirculating system that allows precise thermo-photoperiod manipulation. In the system, four experimental groups were assigned, 18NP (18°C overwintering water temperature, natural photoperiod), 18CP (18°C overwintering water temperature, controlled photoperiod), 16CP (16°C overwintering water temperature, controlled photoperiod), and NTNP (natural water temperature and natural photoperiod), to determine the effects of chilling temperature and photoperiod on spawning performance. OSS was observed in all the experimental groups without significant differences, except NTNP. The manipulated broodstock can re-spawn 3 months later in the next spring in advance. Further analysis of the volume percentage of different stages of oocytes provides a base for excellent regression between the volume percentage of the primary growth stage, cortical alveoli stage, vitellogenesis/maturation stage, and gonadal development/maturation. The results suggest that the volume percentage of oocytes is a better indicator of gonadal development and maturation than the gonadosomatic index. We also found that LMB prefers palm fiber as a spawning nest over gravel. The findings of this work provide important technique guidance for practical OSS of the LMB aquaculture industry and standardization of ovary development and maturation in fish with asynchronous developmental oocytes. Frontiers Media S.A. 2023-04-24 /pmc/articles/PMC10164978/ /pubmed/37168230 http://dx.doi.org/10.3389/fphys.2023.1175075 Text en Copyright © 2023 Hu, Bie, Lu, Ding, Guan, Geng, Ma, Hu, Fan and Shen. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Physiology
Hu, Chen-Hao
Bie, Han-Qing
Lu, Zi-Yi
Ding, Yang
Guan, He-He
Geng, Long-Hui
Ma, Shuai
Hu, Yuan-Xiang
Fan, Qi-Xue
Shen, Zhi-Gang
Out-of-season spawning of largemouth bass in a controllable recirculating system
title Out-of-season spawning of largemouth bass in a controllable recirculating system
title_full Out-of-season spawning of largemouth bass in a controllable recirculating system
title_fullStr Out-of-season spawning of largemouth bass in a controllable recirculating system
title_full_unstemmed Out-of-season spawning of largemouth bass in a controllable recirculating system
title_short Out-of-season spawning of largemouth bass in a controllable recirculating system
title_sort out-of-season spawning of largemouth bass in a controllable recirculating system
topic Physiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10164978/
https://www.ncbi.nlm.nih.gov/pubmed/37168230
http://dx.doi.org/10.3389/fphys.2023.1175075
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