Potential use of offshore marine structures in rebuilding an overfished rockfish species, bocaccio (Sebastes paucispinis)
Potential use of offshore marine structures in rebuilding an overfished rockfish species, bocaccio (Sebastes paucispinis)
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近海海洋结构在重建过度捕捞的石斑鱼品种 bocaccio (Sebastes paucispinis) 中的潜在用途
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
L. Thorsteinson
中科院分区：
文献类型：
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作者：
M. Love;D. Schroeder;W. Lenarz;A. MacCall;A. S. Bull;L. Thorsteinson
虽然薄鳞鱼是北美西海岸沿着一种经济上重要的岩鱼，但过度捕捞已使其数量减少到以前未捕捞数量的7.4%。2003年，我们使用载人研究潜水器，在南加州附近的八个石油和天然气平台周围进行了鱼类调查，作为评估这些结构作为鱼类栖息地的潜在价值的一部分。从这些调查中，我们估计这八个建筑中至少有43万名少年薄伽丘人。我们确定这一数字约为该物种地理范围内每年存活的少年bocaccio平均数量的20%。当这些幼鱼长大成人后，它们将贡献大约百分之一（0.8%）的额外鱼类数量，以重建太平洋沿岸的种群。相比之下，通过区域水肺调查确定的近岸天然苗圃地的幼年薄伽丘补充量在同年较低。这项研究表明，相对少量的人工苗圃栖息地可能是相当有价值的重建过度捕捞的物种。
Abstrac t —Although bocaccio (Sebastes paucispinis) was an economically important rockfish species along the west coast of North America, overfishing has reduced the stock to about 7.4% of its former unfished population. In 2003, using a manned research submersible, we conducted fish surveys around eight oil and gas platforms off southern California as part of an assessment of the potential value of these structures as fish habitat. From these surveys, we estimated that there was a minimum of 430,000 juvenile bocaccio at these eight structures. We determined this number to be about 20% of the average number of juvenile bocaccio that survive annually for the geographic range of the species. When these juveniles become adults, they will contribute about one percent (0.8%) of the additional amount of fish needed to rebuild the Pacific Coast population. By comparison, juvenile bocaccio recruitment to nearshore natural nursery grounds, as determined through regional scuba surveys, was low in the same year. This research demonstrates that a relatively small amount of artificial nursery habitat may be quite valuable in rebuilding an overfished species.