Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan
Understanding the anthropogenic impact of oyster farms is essential for the management and conservation of marine fishes. In Japan, Hiroshima Bay is the region with the most intense oyster farming and thus suitable to study the impact of these farms. Here, we surveyed spherical planktonic eggs of th...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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PeerJ Inc.
2021-06-01
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| Series: | PeerJ |
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| Online Access: | https://peerj.com/articles/11475.pdf |
| _version_ | 1827606672596533248 |
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| author | Kentaro Kawai Hiroki Fujita Gustavo Sanchez Tetsuya Umino |
| author_facet | Kentaro Kawai Hiroki Fujita Gustavo Sanchez Tetsuya Umino |
| author_sort | Kentaro Kawai |
| collection | DOAJ |
| description | Understanding the anthropogenic impact of oyster farms is essential for the management and conservation of marine fishes. In Japan, Hiroshima Bay is the region with the most intense oyster farming and thus suitable to study the impact of these farms. Here, we surveyed spherical planktonic eggs of the black sea bream Acanthopagrus schlegelii, one of the most abundant fish in the Bay. Our survey was performed at fourteen stations which included places with oyster farms and historical spawning grounds. We found the highest egg densities in four stations, one with historical spawning aggregations and three with major oyster farms. Besides, surveys at the innermost part of Hiroshima Bay, where two major rivers discharge, showed a low density of eggs indicating that black sea bream avoids spawning in low salinity areas. Our study suggests that oyster farms benefit spawners of black sea bream by providing more food sources than historical spawning grounds for efficient spawning. Yet, whether oyster farms represent a full advantage for the species remains unclear, particularly because they are known to host jellyfishes that prey on eggs and limit water flow that can influence the survival of fish eggs. |
| first_indexed | 2024-03-09T06:40:38Z |
| format | Article |
| id | doaj.art-c0d4ea86bdc043c9a85d94255684c156 |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T06:40:38Z |
| publishDate | 2021-06-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
| series | PeerJ |
| spelling | doaj.art-c0d4ea86bdc043c9a85d94255684c1562023-12-03T10:51:14ZengPeerJ Inc.PeerJ2167-83592021-06-019e1147510.7717/peerj.11475Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, JapanKentaro KawaiHiroki FujitaGustavo SanchezTetsuya UminoUnderstanding the anthropogenic impact of oyster farms is essential for the management and conservation of marine fishes. In Japan, Hiroshima Bay is the region with the most intense oyster farming and thus suitable to study the impact of these farms. Here, we surveyed spherical planktonic eggs of the black sea bream Acanthopagrus schlegelii, one of the most abundant fish in the Bay. Our survey was performed at fourteen stations which included places with oyster farms and historical spawning grounds. We found the highest egg densities in four stations, one with historical spawning aggregations and three with major oyster farms. Besides, surveys at the innermost part of Hiroshima Bay, where two major rivers discharge, showed a low density of eggs indicating that black sea bream avoids spawning in low salinity areas. Our study suggests that oyster farms benefit spawners of black sea bream by providing more food sources than historical spawning grounds for efficient spawning. Yet, whether oyster farms represent a full advantage for the species remains unclear, particularly because they are known to host jellyfishes that prey on eggs and limit water flow that can influence the survival of fish eggs.https://peerj.com/articles/11475.pdfShellfish aquacultureFish spawningSparidAnthropogenic impactFish eggs |
| spellingShingle | Kentaro Kawai Hiroki Fujita Gustavo Sanchez Tetsuya Umino Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan PeerJ Shellfish aquaculture Fish spawning Sparid Anthropogenic impact Fish eggs |
| title | Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan |
| title_full | Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan |
| title_fullStr | Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan |
| title_full_unstemmed | Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan |
| title_short | Oyster farms are the main spawning grounds of the black sea bream Acanthopagrus schlegelii in Hiroshima Bay, Japan |
| title_sort | oyster farms are the main spawning grounds of the black sea bream acanthopagrus schlegelii in hiroshima bay japan |
| topic | Shellfish aquaculture Fish spawning Sparid Anthropogenic impact Fish eggs |
| url | https://peerj.com/articles/11475.pdf |
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