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Hu Guanyu, Chen Xinjun, Wang Jintao. Forecasting fishing ground of Illex argentinus based on different weight habitat suitability index in the southwestern Atlantic[J]. Haiyang Xuebao, 2015, 37(8): 88-95. doi: 10.3969/j.issn.0253-4193.2015.08.008
Citation: Hu Guanyu, Chen Xinjun, Wang Jintao. Forecasting fishing ground of Illex argentinus based on different weight habitat suitability index in the southwestern Atlantic[J]. Haiyang Xuebao, 2015, 37(8): 88-95. doi: 10.3969/j.issn.0253-4193.2015.08.008

Forecasting fishing ground of Illex argentinus based on different weight habitat suitability index in the southwestern Atlantic

doi: 10.3969/j.issn.0253-4193.2015.08.008
  • Received Date: 2014-12-10
  • Rev Recd Date: 2015-03-26
  • In this study, according to the Chinese squid fishing production data during the main fishing season (January to May) from 2003 to 2005, and 2011, combined with sea surface temperature (SST) and sea surface height (SSH) , We attempt to forecast fishing ground of Illex argentinus based on habitat suitability models with different weights. The suitability index was built by external envelope method, and the arithmetic weighted model (AWM) with different weights were compared and the best habitat suitability index (HSI) model was selected based on the percentage of fishing efforts (fishing days) and catch. Results show that, when HSI value was greater than 0.6, the percentage of fishing efforts was 93.23% and the percentage of catch was 89.28%, and when HSI value was less than 0.4, the percentage of fishing efforts was 2.12% and the percentage of catch was 3.35% by using AWM (a=0.3, the weights of SST and SSH are 0.3 and 0.7 respectively). Compared with AWM with other four weights, the percentage of fishing efforts and of catch were larger when HSI value was greater than 0.6, and the percentage of fishing efforts and catch were smaller when HSI value was less than 0.4. Therefore, given to the percentage of fishing efforts and the percentage of catch, the AWM (a=0.3) was selected to be the best HSI model, defined as HSI=0.3SISST+0.7SISSH, indicating that SSH is more important than SST in estimating the HSI of squid. According to the data from January to May in 2011, we found that the main fishing ground is distributed in the waters with HSI more than 0.6 from the AWM(a=0.3), and the percentage of fishing efforts reached more than 91% and the percentage of catch were above 95%. The results indicate that SSH is more important than SST in the formation of fishing ground of Illex argentinus, and the AWM (a=0.3) based on SST and SSH can better forecast the fishing grounds of Illex argentinus in the southwest Atlantic.
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