Seasonal and spatial variations in prey utilization and condition of a piscivorous flatfish Paralichthys olivaceus

Tomiyama, Takeshi; Kurita, Yutaka

doi:10.3354/ab00319

Cited by 20 publications

(13 citation statements)

References 37 publications

(38 reference statements)

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“…However, flatfish were not frequently observed from the snailfish stomachs, suggesting that the snailfish consume flatfish only occasionally. They feed mainly on Japanese sandlance in Sendai Bay (Kawasaki et al , 1983), although we did not find sandlance in snailfish stomachs, which was possibly due to the absence of sandlance in the study site (Tomiyama & Kurita, 2011). Instead, H-spot eelpout were chiefly consumed at depths of ≥50 m in the study area.…”

Section: Discussioncontrasting

confidence: 55%

Seasonal migration of the snailfishLiparis tanakaeand their habitat overlap with 0-year-old Japanese flounderParalichthys olivaceus

2013

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The snailfish Liparis tanakae is an annual fish, growing up to >300 mm in total length. This species is known as a predator of 0-year-old Japanese flounder Paralichthys olivaceus. To reveal when and where the predation occurs, monthly collections of both species at various depths were conducted off Fukushima, Japan. The snailfish inhabited shallow areas ≤50 m deep until June. Thereafter, they shifted their main habitat to offshore areas ≥100 m deep from July to September. The snailfish migrated to inshore areas with depths of ≤50 m again around October–December, during which time the habitat overlap between snailfish and 0-year-old Japanese flounder was observed. In that period, >40% of 0-year-old Japanese flounder were vulnerable to the snailfish. Larger snailfish showed stronger piscivory, and some flatfish were found in their stomachs. These results suggest that by not releasing hatchery-reared Japanese flounder until September can forestall predation by the snailfish.

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Section: Discussioncontrasting

confidence: 55%

Seasonal migration of the snailfishLiparis tanakaeand their habitat overlap with 0-year-old Japanese flounderParalichthys olivaceus

2013

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“…On 18 April 2011, 14,400 Bq/kg-wet of radiocesium ( 134 Cs + 137 Cs) was detected in a specimen of Japanese sand lance ( Ammodytes personatus ) caught approximately 30 km south of the FDNPP5. This planktivorous pelagic fish is valuable to fisheries and an important prey item for piscivorous fish species off the coast of Fukushima910. This rapid contamination of planktivorous fish by radiocesium was also observed during the initial stage of the Chernobyl accident in 198711.…”

mentioning

confidence: 86%

Radiocesium contamination of greenlings (Hexagrammos otakii) off the coast of Fukushima

Shigenobu

Fujimoto

Ambe

et al. 2014

Sci Rep

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We measured the radiocesium (134Cs and 137Cs) contamination of 236 greenlings (Hexagrammos otakii) off the coast of Fukushima Prefecture in Japan, following the accident at the Fukushima Daiichi Nuclear Power Plant in March 2011. The radiocesium concentrations of greenlings caught approximately 40 km south of the power plant were significantly higher than those of greenlings caught approximately 50 km north of the power plant. The radiocesium concentrations of greenlings caught in southern waters were significantly higher in shallow than in deep waters. Meanwhile, two outlier specimens of greenlings with higher 137Cs concentrations, 16,000 Bq/kg-wet on 1 August 2012 and 1,150 Bq/kg-wet on 8 May 2013, were caught approximately 20 km from the power plant. Our calculations suggest that the probability of two such outlier specimens being found off the coast of Fukushima is exceedingly low. By contrast, extremely contaminated greenlings were frequently caught in the power plant port (geometric mean of 137Cs = 17,364 Bq/kg-wet). Our results suggest that the two outlier greenlings with higher 137Cs concentrations migrated from the power plant port. Continued close monitoring of radiocesium concentrations in the area should be done to ensure the safety of food supplies.

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“…On the other hand, the food regime of olive flounder in the Fukushima coastal water reported by Tomiyama and Kurita (2011) was a food composition dominated by planktivorous fish of 0.8 (cephalopod, 0.1; other fish, 0.1). Although the above site specific food composition should have been used for the olive flounder in proximity to Fukushima, a trail simulation was not successful in this study.…”

Section: Temporal 137 Cs Concentrations In Olive Flounder and Its Typmentioning

confidence: 96%

Radiocesium biokinetics in olive flounder inhabiting the Fukushima accident-affected Pacific coastal waters of eastern Japan

Tateda

Tsumune

Tsubono

et al. 2015

Journal of Environmental Radioactivity

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Seasonal and spatial variations in prey utilization and condition of a piscivorous flatfish Paralichthys olivaceus

Cited by 20 publications

References 37 publications

Seasonal migration of the snailfishLiparis tanakaeand their habitat overlap with 0-year-old Japanese flounderParalichthys olivaceus

Seasonal migration of the snailfishLiparis tanakaeand their habitat overlap with 0-year-old Japanese flounderParalichthys olivaceus

Radiocesium contamination of greenlings (Hexagrammos otakii) off the coast of Fukushima

Radiocesium biokinetics in olive flounder inhabiting the Fukushima accident-affected Pacific coastal waters of eastern Japan

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