Spatiotemporal variations of surface water microplastics near Kyushu, Japan: A quali-quantitative analysis

Kobayashi, Tsunefumi; Yagi, Mitsuharu; Kawaguchi, Toshiya; Hata, Toshiro; Shimizu, Kenichi

doi:10.1016/j.marpolbul.2021.112563

Cited by 31 publications

(12 citation statements)

References 53 publications

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“…Both PE and PP are buoyant polymers with a lower density than seawater (Lefebvre et al, 2019). Kobayashi et al (2021) identified the frequency of polymers and the colour of the surface MPs in the same area closely resembled the composition of the polymer type of the MPs ingested by pelagic fish. In our study, the significant differences in the polymer type composition between S. japonicus and T. japonicus may have been influenced by the habitat depth.…”

Section: Discussionmentioning

confidence: 75%

“…The reason for the lower level of MPs incidence may lie in the unique density distribution of MPs. Kobayashi et al (2021) reported the difference between the highest and lowest abundances were 550-fold across all net tows, based on a survey conducted over a 14-month period near Kyushu, Japan. The spatiotemporal variations in MPs abundance affects MPs incidence in fish.…”

Section: Discussionmentioning

confidence: 99%

“…The fish were dissected and the MPs were sorted in the Fish and Ships Laboratory, Faculty of Fisheries, Nagasaki University, Japan. To minimize potential contamination, standard provisions were undertaken (Kobayashi et al, 2021;Rasta et al, 2021). Briefly, we wore powder free Latex gloves and cotton lab.…”

Section: Plastic Sortingmentioning

confidence: 99%

“…The sieved samples were sorted and examined under a dissecting microscope (SMZ745T, Nikon Corporation, Tokyo, Japan) using a glass petri dish. The sample debris were individually stored in pill cases (Kobayashi et al, 2021).…”

Section: Plastic Sortingmentioning

confidence: 99%

“…The longest section was measured from the image taken by the digital camera using MicroStudio software (WRAYCAM Corporation, Tokyo Japan). MPs were categorized according to their shapes (fragment, film and fibre) and colours (white, transparent, black, yellow, green, blue and others) based on the method described in Kobayashi et al (2021) and Cheung et al (2016). Finally, an attenuated total reflection Fourier transform infrared spectrometer (ATR- FTIR; FT-IR-4600, JASCO Corporation, Tokyo, Japan) was used to identify the plastic polymer composition of all the plastic samples, except the fibre shapes.…”

Section: Plastic Sortingmentioning

confidence: 99%

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Microplastic pollution of commercial fishes from coastal and offshore waters, Japan

Yagi

Kobayashi

Maruyama

et al. 2021

Preprint

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Microplastics (MPs) pollution is a worldwide issue in the marine environment. There is growing concern of consuming MPs through fish, yet the current contamination status of fish collected from the deep sea surrounding Japan remains limited. We present baseline data on MPs in commercially important fishes from the coastal and offshore waters near Kyushu, Japan (East China Sea). We examined the MPs in the digestive tracts of two pelagic (n = 150 in total) and five demersal species (n = 235 in total). The fish were caught by pole and line, and bottom trawl at different geographical positions. The MPs in pelagic fish (39.1 %) were higher than demersal fish (10.3 %) and of larger sizes. The MPs correlated with habitat depth and type. There was species variation in the shape and polymer composition of MPs. These results increase our understanding of the heterogeneous uptake of MPs by fishes.

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Plastic Sortingmentioning

confidence: 99%

Section: Plastic Sortingmentioning

confidence: 99%

Section: Plastic Sortingmentioning

confidence: 99%

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