Abstract
Ommastrephes bartramii can vertically swim during its life, and previous studies have suggested the need to account for preferred habitat distribution influenced by water temperatures at different depths. To explore the impacts of deep-water temperature on O. bartramii spatial distribution, we constructed generalized additive models (GAMs) based on the Chinese squid-jigging fishery data and the Argo deep water temperature data during 2005–2018 in the Northwest Pacific Ocean to analyze the relationships between the local abundance of O. bartramii and deep-water temperatures. The results showed that the variables including surface water temperature (T0), water temperature at 30- and 100-m depths (T30 and T100), and water differences between T0 and T30 (D0–30) significantly affected the spatial distribution of O. bartramii. The suitable ranges of each variable are different, > 15.5°C for T0, 11–18°C for T30, < 6°C for T100, and 4–4.5°C for D0–30. The areas occupied by the suitable T30 seemed to reflect the outline of fishing ground, whereas the areas with suitable T100 were to indicate the high density of O. bartramii. The predicted suitable habitat area and high-density area for O. bartramii are also regulated by El Niño–Southern Oscillation (ENSO) events. We demonstrated how the estimates of O. bartramii spatial distribution would vary influenced by deep-water temperatures in the Northwest Pacific Ocean. This information may help develop an appropriate method for investigating the effects of deep-water temperature on species with vertical migration.
Highlights
Neon flying squid (Ommastrephes bartramii) is an oceanic cephalopod economic fish species widely distributed in the subtropical and temperate waters of the Northwest Pacific Ocean, with high economic value and special ecological status (Yu et al, 2013)
We developed generalized additive models (GAMs) to explore the relationships between water temperatures at different depths and hindcast the preferred habitat distributions of O. bartramii for revealing the mechanism of formatting fishing ground-driven by water temperatures in the Northwest Pacific Ocean
The performance of the GAM with significant explanatory variables was evaluated via 100 times cross-validation, which was detailed by Wang et al (2020)
Summary
Neon flying squid (Ommastrephes bartramii) is an oceanic cephalopod economic fish species widely distributed in the subtropical and temperate waters of the Northwest Pacific Ocean, with high economic value and special ecological status (Yu et al, 2013). The population structure (Yatsu et al, 1997), migration (Murata and Nakamura, 1998; Ichii et al, 2009), and distribution in relation to the marine environment of O. bartramii have been extensively studied (Murata et al, 1983; Yatsu et al, 2000; Ichii et al, 2004) Reports from these studies indicate that sea surface temperature (SST) is the dominant factor affecting the distribution of O. bartramii in the Northwest Pacific Ocean (Bower and Ichii, 2005). Previous studies suggested that changes in the abundance of O. bartramii resources may be linked to mesoscale environmental changes (El Niño and La Niña events) (Chen et al, 2007). The monthly SST anomaly between 5◦N and 5◦S and 120◦E–170◦W indicated that strong La Niña event happened in 2007, while strong El Niño event happened in 2015 during the main fishing seasons for O. bartramii (Figure 1; Li et al, 2020)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
