Influences of photosynthetically active radiation on abundance and distribution of jumbo flying squid <i>Dosidicus gigas</i> in the Southeast Pacific Ocean off Peru

Yu Wei; Chen Xinjun

doi:10.3969/j.issn.0253-4193.2017.11.009

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Yu Wei, Chen Xinjun. Influences of photosynthetically active radiation on abundance and distribution of jumbo flying squid Dosidicus gigas in the Southeast Pacific Ocean off Peru[J]. Haiyang Xuebao, 2017, 39(11): 97-105. doi: 10.3969/j.issn.0253-4193.2017.11.009

Citation:

Yu Wei, Chen Xinjun. Influences of photosynthetically active radiation on abundance and distribution of jumbo flying squid Dosidicus gigas in the Southeast Pacific Ocean off Peru[J]. Haiyang Xuebao, 2017, 39(11): 97-105. doi: 10.3969/j.issn.0253-4193.2017.11.009

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Influences of photosynthetically active radiation on abundance and distribution of jumbo flying squid Dosidicus gigas in the Southeast Pacific Ocean off Peru

doi: 10.3969/j.issn.0253-4193.2017.11.009

Yu Wei,
Chen Xinjun

College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China

Received Date: 2017-03-21
Rev Recd Date: 2017-05-17

Abstract

Abstract

The photosynthetically active radiation (PAR) is one of the most important factors driving the variations in ocean primary productivity, implying that the PAR may have potential influence on the abundance and spatial distribution of pelagic fish species. In this study, the catch per unit effort (CPUE) and the latitudinal gravity center (LATG) of CPUE was used to indicate the squid abundance and spatial distribution of fishing ground, respectively, we evaluated the influence of PAR on stock variation of jumbo flying squid Dosidicus gigas in the Southeast Pacific Ocean off Peru, based on the fishery data during 2006-2015 obtained from the Chinese squid-jigging Science and Technology Group as well as the remotely satellite data. The results indicated that the catch, fishing effort, CPUE and PAR exhibited significant monthly variations. The CPUE and PAR showed the similar trend, decreasing from January to June and increasing from July to December. The correlation analysis suggested that positive relationship was found between the CPUE and the PAR. However, the correlation was significant in July and August, but was not significant in other months. Based on the histogram analysis, the monthly suitable and the most preferred PAR for Dosidicus gigas were evaluated. Significantly positive relationship was found between the monthly percentages of suitable PAR accounting for the fishing ground and the CPUE over 2006-2015, suggesting that the abundance of Dosidicus gigas off Peruvian waters was determined by the monthly suitable PAR area. Meanwhile, the latitudinal gravity center of CPUE was positively related to the mean latitude of the most preferred PAR, indicating that the locations of fishing ground of Dosidicus gigas were strongly affected by the latitudinal distribution of the most favorable PAR. Furthermore, the suitable PAR area in La Niña years was much larger than that in El Niño years. Our findings suggested that the abundance and spatial distribution of Dosidicus gigas in the Southeast Pacific Ocean off Peru were significantly influenced by the PAR, the regulation process tended to be different under different climate variability.
- Dosidicus gigas,
- photosynthetically active radiation,
- abundance,
- spatial distribution,
- El Niño and La Niña events,
- the Southeast Pacific Ocean

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References

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