期刊
CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷 29, 期 3, 页码 493-504出版社
SCIENCE PRESS
DOI: 10.1007/s00343-011-0058-y
关键词
model; habitat suitability index; eastern fall cohort of Ommastrephes bartramii; fishing effort; CPUE; central North Pacific Ocean
资金
- PhD Programs Foundation of Ministry of Education of China [20093104110002]
- National High Technology Research and Development Program of China (863 Program) [2007AA092201, 2007AA092202]
- National Natural Science Foundation [NSFC40876090]
- Shanghai Leading Academic Discipline Project [S30702]
- Shanghai Dongfang Scholar Program
The eastern fall cohort of the neon flying squid, Ommastrephes bartramii, has been commercially exploited by the Chinese squid jigging fleet in the central North Pacific Ocean since the late 1990s. To understand and identify their optimal habitat, we have developed a habitat suitability index (HSI) model using two potential important environmental variables - sea surface temperature (SST) and sea surface height anomaly (SSHA) - and fishery data from the main fishing ground (165 degrees-180 degrees E) during June and July of 1999-2003. A geometric mean model (GMM), minimum model (MM) and arithmetic weighted model (AWM) with different weights were compared and the best HSI model was selected using Akaike's information criterion (AIC). The performance of the developed HSI model was evaluated using fishery data for 2004. This study suggests that the highest catch per unit effort (CPUE) and fishing effort are closely related to SST and SSHA. The best SST- and SSHA-based suitability index (SI) regression models were SISST-based = 0.7SI(effort-SST) + 0.3 SICPUE-SST, and SISSHA-based = 0.5SI(effort-SSHA) + 0.5SI(CPUE-SSHA), respectively, showing that fishing effort is more important than CPUE in the estimation of SI. The best HSI model was the AWM, defined as HSI=0.3SI(SST-based)+ 0.7SI(SSHA-based), indicating that SSHA is more important than SST in estimating the HSI of squid. In 2004, monthly HSI values greater than 0.6 coincided with the distribution of productive fishing ground and high CPUE in June and July, suggesting that the models perform well. The proposed model provides an important tool in our efforts to develop forecasting capacity of squid spatial dynamics.
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