Variability in the potential habitat of winter-spring cohort of neon flying squid <i>Ommastrephes bartramii</i> in the northwest Pacific Ocean

Yu Wei; Chen Xinjun

doi:10.3969/j.issn.0253-4193.2018.03.008

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Yu Wei, Chen Xinjun. Variability in the potential habitat of winter-spring cohort of neon flying squid Ommastrephes bartramii in the northwest Pacific Ocean[J]. Haiyang Xuebao, 2018, 40(3): 86-94. doi: 10.3969/j.issn.0253-4193.2018.03.008

Citation:

Yu Wei, Chen Xinjun. Variability in the potential habitat of winter-spring cohort of neon flying squid Ommastrephes bartramii in the northwest Pacific Ocean[J]. Haiyang Xuebao, 2018, 40(3): 86-94. doi: 10.3969/j.issn.0253-4193.2018.03.008

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Variability in the potential habitat of winter-spring cohort of neon flying squid Ommastrephes bartramii in the northwest Pacific Ocean

doi: 10.3969/j.issn.0253-4193.2018.03.008

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: 2017-05-31

Abstract

Abstract

The neon flying squid Ommastrephes bartramii is a short-lived squid species, its suitable habitat is primarily dominated by the water temperature. In this study, the fishery data during 2006-2015 were obtained from the Chinese squid-jigging Science and Technology Group. Based on the relationship between the fishing effort and sea surface temperature (SST), we calculated the monthly proportion of favorable-SST area (PFSST) for O. bartramii, and further estimated the PFSST during 1985-2015. The decadal variability in the PFSST was examined and we also evaluated the influence of El Niño and La Niña events with different intensity on squid PFSST. Results suggested that the suitable SST for O. bartramii dramatically varied from month to month, corresponding to 16-19℃, 17-21℃, 15-19℃, 14-16℃ and 12-13℃, respectively, from July to November. The catch per unit effort (CPUE) varied with the PFSST, significantly positive correlation was found between them, suggesting that the PFSST on the fishing ground of O. bartramii increased, the CPUE would increase. The PFSST over 1985-2015 showed clearly monthly and interannual variability, which initially increased then decreased from July to November. Interannual variability of PFSST in July, August and September was basically the same, and similar interannual fluctuation in PFSST was found in October and November. Furthermore, significant positive relationship was found between the PFSST and SST on the fishing ground of O. bartramii during 1985-2015. The PFSST on the fishing ground of O. bartramii was greatly affected by the El Niño and La Niña events, but the influence varied with the intensity of each climatic event, which presented as:the SST under the weak La Niña event and normal climatic condition was the highest, the PFSST significantly increased; the SST under the Niña event with moderate and strong intensity was also high, however, the PFSST decreased. The SST under the El Niño events with weak, moderate and very strong intensity was low, while the PFSST for weak and very strong El Niño events was higher than that under the moderate El Niño event.
- Ommastrephes bartramii,
- habitat,
- sea surface temperature,
- suitable area,
- decadal variability,
- the northwest Pacific Ocean

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References(23)

References

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