Northward migration dynamics of skipjack tuna (Katsuwonus pelamis) associated with the lower thermal limit in the western Pacific Ocean

Kiyofuji, Hidetada; Aoki, Yosuke; Kinoshita, Jin H.; Okamoto, Susumu; Masujima, Masachika; Matsumoto, Takayuki; Fujioka, Ko; Ogata, Rina; Nakao, Takeshi; Sugimoto, Naoto; Kitagawa, Takashi

doi:10.1016/j.pocean.2019.03.006

Cited by 35 publications

(36 citation statements)

References 36 publications

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“…Our findings on the temperature-depth profiles are consistent with the previous work [32,90]. Recently, [67] also found that throughout skipjack tuna's northward migration in the western North Pacific, their vertical distribution became shallower in higher latitudes, which is thought to be a strategy to avoid exposure to the cold water less than 18˚C. This information can help managers to assess how these fishes are likely to respond biologically to warming of the upper ocean.…”

Section: Plos Onesupporting

confidence: 92%

“…This observation can also be explained by skipjack tuna’s migratory behavior in relation to sea surface temperature. From early spring, skipjack tuna are known to migrate north and track warm waters above 18°C, while in late autumn (November), the northern migration is hampered by surface cooling of the Oyashio area [ 67 ], and thus the species is quite selective in utilization of space, in relation to spatial temperature distribution.…”

Section: Discussionmentioning

confidence: 99%

“…From early spring, skipjack tuna are known to migrate north and track warm waters above 18˚C, while in late autumn (November), the northern migration is hampered by surface cooling of the Oyashio area [67], and thus the species is quite selective in utilization of space, in relation to spatial temperature distribution. The observed seasonal northward displacement of skipjack tuna habitat hotspots in the entire study area (Fig 4) is characteristic of the latitudinal migration of skipjack tuna [68,69].…”

Section: Plos Onementioning

confidence: 99%

“…The results of such work are important in improving fishery forecasting models in the western North Pacific. Skipjack tuna are pelagic fishes and the pole and line fishery targets fish within the upper mixed layer of the water column where they confine in waters high in dissolved oxygen [67,76]. The upper mixed layer is affected by surface warming, which influences the depth, temperature, and primary production in the mixed layer [32].…”

Section: Sub-surface Environment Variabilitymentioning

confidence: 99%

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Identification of skipjack tuna (Katsuwonus pelamis) pelagic hotspots applying a satellite remote sensing-driven analysis of ecological niche factors: A short-term run

et al. 2020

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Skipjack tuna (SJT) pelagic hotspots in the western North Pacific (WNP) were modelled using fishery and satellite remotely sensed data with Ecological Niche Factor Analysis (ENFA) models. Our objectives were to model and predict habitat hotspots for SJT and assess the monthly changes in sub-surface temperatures and mixed layer depths at fishing locations. SJT presence-only monthly resolved data, sea surface temperature, chlorophylla, diffuse attenuation coefficient, sea surface heights and surface wind speed were used to construct ENFA models and generate habitat suitability indices using a short-term dataset from March-November 2004. The suitability indices were then predicted for July-October (2007 and 2008). Monthly aggregated polygons of areas fished by skipjack tuna pole and line vessels were also overlaid on the predicted habitat suitability maps. Distributions of subsurface temperatures and mixed layer depths (MLD) at fishing locations were also examined. Our results showed good fit for ENFA models, as indicated by the absolute validation index, the contrast validation index and the continuous Boyce index. The predicted hotspots showed varying concurrences when compared with 25-degree polygons derived from fished areas. Northward shifts in SJT hotspots corresponded with declining MLDs from March to September. The MLDs were shallower in summer and deeper in autumn and winter months. The habitat hotspots modeled using ENFA were consistent with the known ecology and seasonal migration pattern of SJT. The findings of this work, derived from a short-term dataset, enable identification of SJT hotspots in the WNP, thus contributing valuable information for future research on SJT habitat prediction models.

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Section: Plos Onesupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Sub-surface Environment Variabilitymentioning

confidence: 99%

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Identification of skipjack tuna (Katsuwonus pelamis) pelagic hotspots applying a satellite remote sensing-driven analysis of ecological niche factors: A short-term run

et al. 2020

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“…After skin-on filleting, about 30% of the whole fish is by-product and currently goes mainly to landfill. The skipjack tuna ( Katsuwonus pelamis ) is a migratory species with a broad distribution from the equatorial to temperate zones [23]. The skipjack tuna is caught mainly to produce canned tuna.…”

Section: Introductionmentioning

confidence: 99%

Proximate Composition and Nutritional Profile of Rainbow Trout (Oncorhynchus mykiss) Heads and Skipjack tuna (Katsuwonus Pelamis) Heads

Liu

Jiang

et al. 2019

Molecules

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In order to evaluate the application potential of rainbow trout (Oncorhynchus mykiss) heads and skipjack tuna (Katsuwonus pelamis) heads; proximate composition, amino acids, fatty acids, carnosine, and anserine contents were analyzed in this study. Rainbow trout heads showed significantly higher protein (29.31 g/100 g FW, FW is abbreviation of fresh weight) and lipid (6.03 g/100 g FW) contents than skipjack tuna heads (18.47 g/100 g FW protein and 4.83 g/100 g FW lipid) (p < 0.05). Rainbow trout heads and skipjack tuna heads exhibited similar amino acid composition. Essential amino acids constituted more than 40% of total amino acids in both rainbow trout head and skipjack tuna head. The fatty acid profile was different between rainbow trout heads and skipjack tuna heads. Rainbow trout heads mainly contained 38.64% polyunsaturated fatty acids (PUFAs) and 38.57% monounsaturated fatty acids (MUFAs), whereas skipjack tuna heads mainly contained 54.46% saturated fatty acids (SFAs). Skipjack tuna heads contained 4563 mg/kg FW anserine and 1761 mg/kg FW carnosine, which were both significantly higher than those of rainbow trout heads (p < 0.05). These results demonstrate that both rainbow trout heads and skipjack tuna heads may be used as materials for recycling high-quality protein. Meanwhile, rainbow trout heads can be used to extract oil with high contents of unsaturated fatty acids, while skipjack tuna heads may be a source for obtaining carnosine and anserine.

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Species composition and infection levels of Anisakis (Nematoda: Anisakidae) in the skipjack tuna Katsuwonus pelamis (Linnaeus) in the Northwest Pacific

et al. 2021

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Northward migration dynamics of skipjack tuna (Katsuwonus pelamis) associated with the lower thermal limit in the western Pacific Ocean

Cited by 35 publications

References 36 publications

Identification of skipjack tuna (Katsuwonus pelamis) pelagic hotspots applying a satellite remote sensing-driven analysis of ecological niche factors: A short-term run

Identification of skipjack tuna (Katsuwonus pelamis) pelagic hotspots applying a satellite remote sensing-driven analysis of ecological niche factors: A short-term run

Proximate Composition and Nutritional Profile of Rainbow Trout (Oncorhynchus mykiss) Heads and Skipjack tuna (Katsuwonus Pelamis) Heads

Species composition and infection levels of Anisakis (Nematoda: Anisakidae) in the skipjack tuna Katsuwonus pelamis (Linnaeus) in the Northwest Pacific

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