Possible link between interannual variation of neon flying squid (Ommastrephes bartramii) abundance in the North Pacific and the climate phase shift in 1998/1999

Igarashi, Hiromichi; Ichii, Taro; Sakai, Mitsuo; Ishikawa, Yoichi; Toyoda, Takahiro; Masuda, Shuhei; Sugiura, Nozomi; Mahapatra, Kedarnath; Awaji, Toshiyuki

doi:10.1016/j.pocean.2015.03.008

Cited by 25 publications

(10 citation statements)

References 34 publications

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“…We developed the MOVE‐3D model by adding several 3D ocean environmental parameters to the MOVE‐2D model. Firstly, we added MLD as an additional parameter since a previous study pointed out that MLD is one of the environmental factors that influence the neon flying squid habitats (Alabia et al., ), and it is assumed to affect the squid habitat via the nutrient‐rich water supply from lower layers of the ocean (Igarashi et al., ; Nishikawa et al., ). The MLD was estimated using vertical profiles of temperature and salinity derived from MOVE‐WNP.…”

Section: Resultsmentioning

confidence: 99%

Identifying potential habitat distribution of the neon flying squid (Ommastrephes bartramii) off the eastern coast of Japan in winter

Igarashi

Saitoh

Ishikawa

et al. 2017

Fisheries Oceanography

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Section: Resultsmentioning

confidence: 99%

Identifying potential habitat distribution of the neon flying squid (Ommastrephes bartramii) off the eastern coast of Japan in winter

Igarashi

Saitoh

Ishikawa

et al. 2017

Fisheries Oceanography

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“…Moreover, in the North Pacific, O . bartramii population is comprised of two seasonal spawning cohorts (winter-spring and autumn) with life histories extremely dependent on the variability of spatial and temporal features of the oceanographic environment [ 17 , 18 , 19 , 20 ]. For instance, the squids’ annual roundtrip north-south migration for feeding and spawning is linked with the northern warm-water branches and the warm-core rings of the Kuroshio Current [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Identifying Pelagic Habitat Hotspots of Neon Flying Squid in the Temperate Waters of the Central North Pacific

et al. 2015

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We identified the pelagic habitat hotspots of the neon flying squid (Ommastrephes bartramii) in the central North Pacific from May to July and characterized the spatial patterns of squid aggregations in relation to oceanographic features such as mesoscale oceanic eddies and the Transition Zone Chlorophyll-a Front (TZCF). The data used for the habitat model construction and analyses were squid fishery information, remotely-sensed and numerical model-derived environmental data from May to July 1999–2010. Squid habitat hotspots were deduced from the monthly Maximum Entropy (MaxEnt) models and were identified as regions of persistent high suitable habitat across the 12-year period. The distribution of predicted squid habitat hotspots in central North Pacific revealed interesting spatial and temporal patterns likely linked with the presence and dynamics of oceanographic features in squid’s putative foraging grounds from late spring to summer. From May to June, the inferred patches of squid habitat hotspots developed within the Kuroshio-Oyashio transition zone (KOTZ; 37–40°N) and further expanded north towards the subarctic frontal zone (SAFZ; 40–44°N) in July. The squid habitat hotspots within the KOTZ and areas west of the dateline (160°W-180°) were likely influenced and associated with the highly dynamic and transient oceanic eddies and could possibly account for lower squid suitable habitat persistence obtained from these regions. However, predicted squid habitat hotspots located in regions east of the dateline (180°-160°W) from June to July, showed predominantly higher squid habitat persistence presumably due to their proximity to the mean position of the seasonally-shifting TZCF and consequent utilization of the highly productive waters of the SAFZ.

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“…Previous studies have described the spatial and temporal patterns of potential habitat of neon flying squid in response to dominant modes of high-frequency climate variability such as the El Niño Southern Oscillation (ENSO) [6,46,47]. Moreover, the impacts of the basin-wide regime shifts based on PDO patterns on relative abundances of autumn [7,8] and winter [35] cohorts of neon flying squid in the northwestern Pacific have been previously explored. Our analyses, however, focused on temporal habitat and environmental gradients in summer foraging zones of the autumn cohort (central Pacific; 160 • W-160 • E) under the contemporary PDO phase transitions, hence, affording insights into its distributional response to shifting climate and setting this work apart from previous studies.…”

Section: Discussionmentioning

confidence: 99%

“…bartramii population in the North Pacific Ocean encompasses two seasonal cohorts: winter-spring and autumn spawning groups [5]. Their spatial and temporal distributions are linked with the basin-wide oceanic circulation and their life history stages are highly responsive to the variability in ambient oceanographic regimes and concomitant changes in epipelagic environment [6][7][8]. Furthermore, both squid cohorts undergo extensive seasonal and meridional migrations between their spawning (subtropical region; 20-30 • N) and foraging sites (Kuroshio-Oyashio transition and subarctic frontal zones; 30-50 • N), within their brief 1-year life-span ( Figure 1A) [5,9,10].…”

Section: Introductionmentioning

confidence: 99%

Spatial Habitat Shifts of Oceanic Cephalopod (Ommastrephes bartramii) in Oscillating Climate

et al. 2020

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Short- and long-term climate oscillations impact seascapes, and hence, marine ecosystem structure and dynamics. Here, we explored the spatio-temporal patterns of potential squid habitat in the western and central North Pacific across inter-decadal climate transitions, coincident with periods of persistent warming and cooling. Potential habitat distributions of Ommastrephes bartramii were derived from the outputs of multi-ensemble species distribution models, developed using the most influential environmental factors to squid distribution and occurrence data. Our analyses captured the underlying temporal trends in potential squid habitat in response to environmental changes transpiring at each climatic transition, regulated by phase shifts in Pacific decadal oscillation (PDO) from 1999–2013. The spatial differences in environmental conditions were apparent across transitions and presumably modulate the local changes in suitable squid habitat over time. Specifically, during a cold to warm PDO shift, decreases in the summer potential habitat (mean rate ± standard deviation: −0.04 ± 0.02 habitat suitability index (HSI)/yr) were observed along the southern edge of the subarctic frontal zone (162°E–172°W). Coincidentally, this area also exhibits a warming trend (mean temporal trend: 0.06 ± 0.21 °C/yr), accompanied with the prevalence of cold-core mesoscale eddies, west of the dateline (mean temporal trend in sea surface height: −0.19 ± 1.05 cm/yr). These conditions potentially generate less favorable foraging habitat for squid. However, a warm-to-cold PDO transition underpins a northward shift of suitable habitat and an eastward shift of regions exhibiting the highest rate of potential squid habitat loss (170–160°W; mean temporal trend: −0.05 ± 0.03 HSI/yr). Nonetheless, the emergence of the areas with increasingly suitable habitat regardless of climate transitions suggests the ecological importance of these regions as potential squid habitat hotspots and climatic refugia.

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Possible link between interannual variation of neon flying squid (Ommastrephes bartramii) abundance in the North Pacific and the climate phase shift in 1998/1999

Cited by 25 publications

References 34 publications

Identifying potential habitat distribution of the neon flying squid (Ommastrephes bartramii) off the eastern coast of Japan in winter

Identifying potential habitat distribution of the neon flying squid (Ommastrephes bartramii) off the eastern coast of Japan in winter

Identifying Pelagic Habitat Hotspots of Neon Flying Squid in the Temperate Waters of the Central North Pacific

Spatial Habitat Shifts of Oceanic Cephalopod (Ommastrephes bartramii) in Oscillating Climate

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