Study on residual yield model of winter fishes of Todarodes pacificus based on water temperature factors
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摘要: 水温是影响太平洋褶柔鱼冬生群生长、繁殖、补充的重要因素之一。根据2004–2015年太平洋褶柔鱼冬生群渔业数据和其栖息地环境数据,包括1月产卵场(28°~35°N,125°~130°E)和9月索饵场(31°~38°N,128°~132°E)海表面温度(Sea Surface Temperature,SST),建立了基于SST因子的太平洋褶柔鱼冬生群体的剩余产量模型,分析SST对太平洋褶柔鱼冬生群资源量的影响,对该模型的各项指标进行验证,发现该模型的预测精度较高。结果表明:太平洋褶柔鱼冬生群当年的资源量及渔获量主要受索饵场SST影响,而产卵场SST对其当年渔获量影响不显著。由此建议在今后对产卵场SST因子是否对次年的渔获量及资源量产生影响进行研究,同时渔业管理部门也应根据每年海洋环境状况确定其最大可持续产量,并实时调整管理方案。Abstract: Water temperature is one of the important factors affecting the growth, reproduction and supplement of the winter fishes of Todarodes in the Pacific. According to the fishery data of the Pacific winter Todarodes from 2004 to 2015 and its habitat environment data, including the January spawning ground (28°–35°N, 125°–130°E) and the September feeding ground (31°–38°N, 128°–132°E) sea surface temperature (SST), a surplus production model based on SST factor was established to analyze the effect of SST on the resources of the winter migrating fish population of the North Pacific Todarodes. By verifying the indicators of the model of the surplus production model, this study find that the model has higher prediction accuracy. The results show that the resources and catches of the winter fishes of Todarodes pacificus are mainly affected by the SST of the feeding ground, but the spawning ground SST has no significant effect on its catch in the current year. Therefore, it is recommended to strengthen the research on whether the SST factor of the spawning ground may affect the catch and resources of the next year, and the fishery management department should also determine its maximum sustainable yield according to the state of the marine environment every year, and the management plan should be adjusted in real time.
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Key words:
- winterfishes of Todarodes pacificus /
- SST /
- surplus production model /
- spawning ground /
- feeding ground
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表 1 2004–2015年太平洋褶柔鱼冬生群渔业资源统计数据(渔获量和捕捞努力量)及1月产卵场和9月索饵场的平均SST
Tab. 1 Summary of catch effort and CPUE data of Todarodes pacificus winter fish and monthly SST of January and September from 2004 to 2015
年份 渔获量/万t CPUE/t·网次−1 捕捞努力量/网次 1月SST/℃ 9月SST/℃ 日本 韩国 总计 2004 142 837 70 773 213 610 1.18 181 025 18.53 25.58 2005 117 196 68 174 185 370 1.07 173 242 18.82 25.52 2006 89 025 77 021 166 046 0.83 200 055 17.69 25.31 2007 188 312 78 287 266 599 1.68 158 689 18.67 26.83 2008 138 713 66 756 205 468 1.59 129 225 18.99 26.24 2009 139 825 73 301 213 126 1.60 133 203 18.49 25.55 2010 145 301 75 922 221 223 1.23 179 856 18.23 26.95 2011 185 849 103 703 289 552 1.55 186 807 18.13 26.09 2012 110 869 71 145 182 014 1.24 146 785 18.52 25.50 2013 140 011 87 761 227 772 1.23 185 180 17.83 26.55 2014 134 218 82 763 216 981 1.15 188 679 18.21 25.78 2015 96 894 86 451 183 344 0.81 226 350 17.74 24.74 表 2 关键海区SST与CPUE相关系数与显著分析的结果
Tab. 2 Correlation coefficient and significance analysis results between SST at the key sea area and the CPUE
位置 月份 相关系数r 显著性p 28°~35°N,125°~130°E 1月 0.603 0.038 28.5°~30.5°N,127.5°~128.5°E 2月 0.576 0.048 31°~38°N,128°~132°E 9月 0.609 0.036 33.5°~34.5°N,130.5°~131.5°E 10月 0.542 0.045 表 3 基于索饵场SST因子的太平洋褶柔鱼冬生群剩余产量模型的验证结果
Tab. 3 The verification result of the surplus production model of the winter fishes of Todarodes pacificus based on the SST factor of the feeding ground
相对误差平均值/% 相关系数r 显著性p 10.17 0.651 0.029 -
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