Seasonal variations and comparative nutritional composition of hatchery-reared, hatchery-released, and wild black rockfish (Sebastes schlegelii)

Liu Wang; Liu Wang; Yunhai He; Xu Wei; Xinyan Liang; Xinyan Liang; Ruonan Zhang; Ruonan Zhang; Qi Liu; Qi Liu; Chenqi Wang; Chenqi Wang; Jinfeng Chen; Jinfeng Chen; Meiyuan Li; Meiyuan Li; Zhi Ma; Shaodong Qu

doi:10.3389/fmars.2024.1536508

Frontiers in Marine Science (Jan 2025)

Seasonal variations and comparative nutritional composition of hatchery-reared, hatchery-released, and wild black rockfish (Sebastes schlegelii)

Liu Wang,
Liu Wang,
Yunhai He,
Xu Wei,
Xinyan Liang,
Xinyan Liang,
Ruonan Zhang,
Ruonan Zhang,
Qi Liu,
Qi Liu,
Chenqi Wang,
Chenqi Wang,
Jinfeng Chen,
Jinfeng Chen,
Meiyuan Li,
Meiyuan Li,
Zhi Ma,
Shaodong Qu

Affiliations

Liu Wang: College of Marine Science and Environment Engineering, Dalian Ocean University, Dalian, China
Liu Wang: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Yunhai He: College of Food Science and Engineering, Dalian Ocean University, Dalian, China
Xu Wei: College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
Xinyan Liang: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Xinyan Liang: College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
Ruonan Zhang: College of Marine Science and Environment Engineering, Dalian Ocean University, Dalian, China
Ruonan Zhang: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Qi Liu: College of Marine Science and Environment Engineering, Dalian Ocean University, Dalian, China
Qi Liu: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Chenqi Wang: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Chenqi Wang: College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
Jinfeng Chen: College of Marine Science and Environment Engineering, Dalian Ocean University, Dalian, China
Jinfeng Chen: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Meiyuan Li: College of Marine Science and Environment Engineering, Dalian Ocean University, Dalian, China
Meiyuan Li: Key Laboratory of Environment Controlled Aquaculture (Dalian Ocean University) Ministry of Education, Dalian, China
Zhi Ma: Dalian Jinpu New District Marine and Fisheries Comprehensive Administrative Law Enforcement Team, Dalian, China
Shaodong Qu: Changhai County Marine and Fisheries Comprehensive Administrative Law Enforcement Team, Dalian, China

DOI: https://doi.org/10.3389/fmars.2024.1536508
Journal volume & issue: Vol. 11

Abstract

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The black rockfish (Sebastes schlegelii) is a commercially important marine species in the Northwest Pacific Ocean. Its population has significantly declined due to overfishing and environmental changes. Stock enhancement has been launched in response to wild populations decline. However, limited evidence is available to confirm the ecological effects after release. Empirically, if the hatchery-released individuals are well-adapted to the wild environment, they should show good or similar nutritional conditions as well as their wild counterparts. Therefore, nutritional analysis was essential and conducted in the present study, by using 146 S. schlegelii individuals in order to compare the differences among hatchery-reared (before-release), hatchery-released, and wild conspecifics (post-release) groups in consideration of different environments during a whole stock enhancement practice. Our results exhibited that hatchery-reared S. schlegelii exhibited significantly lower levels of crude protein and amino acid content than that of hatchery-released and wild ones (P < 0.05). Specifically, both the hatchery-released and wild S. schlegelii generally showed similar trends of nutrition profiling compared with their hatchery-reared counterparts, such as moisture, crude ash, crude lipid, crude protein, and amino acid profiles (P > 0.05), indicating homogeneity in their nutritional contents. Our research suggested that S. schlegelii exhibited extensive ecological plasticity, and the variations in nutrition of a population was mainly influenced by environmental factors rather than the origin. However, several differences in fatty acid composition between hatchery-released and wild S. schlegelii indicated that hatchery-released fish might not have fully adapt to the food supply in the wild. This study provided insights into promoting responsible stock enhancement of this species in the future.

Published in Frontiers in Marine Science

ISSN: 2296-7745 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Natural history (General): General. Including nature conservation, geographical distribution
Website: https://www.frontiersin.org/journals/marine-science

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