Effects of six codend meshes on the size selection of juvenile white croaker (Pennahia argentata) in demersal trawl fishery of the South China Sea

Yang, Bingzhong; Herrmann, Bent; Liang, Yan; Li, Jie; Wang, Teng

doi:10.1371/journal.pone.0253723

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…This suggests that global sustainable harvest limits could be approached . Considering that the global landings did not show signs of overexploitation or stock collapse (Pauly, 2018), available studies have presented three potential but still debatable reasons contributing to the stable landings: offshore extension of pelagic and demersal fisheries (Watson and Morato, 2013), downtrend of trophic level (Bhathal and Pauly, 2008;Liang and Pauly, 2020), and juvenile fishing (Krumme et al, 2013;Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

et al. 2022

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Fisheries catch is determined by a complex combination of biological and industrial factors. In this study, using data from the online database Sea Around Us from 1950 to 2018, the risk of fisheries collapse was assessed for the three large marine ecosystems (LMEs) around China by analyzing the carbon transfer efficiency, mean trophic level, and mean maximum length of fisheries catch and expansion factor. In addition, these were compared with the corresponding values for other LMEs, especially the Humboldt Current and the North Sea LMEs, which experienced fisheries collapse.Our results revealed high carbon transfer efficiencies in LMEs around China, suggesting large fishing efforts compared with LMEs with similar primary production. Although marine fish landings did not decline significantly, they were maintained by potential resources associated with offshore and deep expansion and fishing of lower–trophic-level species and juvenile fish. However, the potential resources have been largely consumed in the East China Sea and South China Sea LMEs, where the ratio of the primary production required to sustain catches to the total primary production (%PPR) was greater than 50%. In contrast, this ratio in the Yellow Sea LME was lower; however, this value was still higher than the sustainable ratio in the Humboldt Current LME. Without proper fisheries management, the three fisheries around China are likely to collapse, as observed in case of the North Sea LME in the 1970s.

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Section: Introductionmentioning

confidence: 99%

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

et al. 2022

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A review on fishing gear in China: Selectivity and application

Wang

Tang

et al. 2022

Aquaculture and Fisheries

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Tempo-Spatial Distribution of an Endangered Fish Species, Threadfin Porgy Evynnis cardinalis (Lacepède, 1802), in the Northern South China Sea

Zhang

Sun

et al. 2022

JMSE

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Accurate information on the temporal and spatial distribution of fish stocks is necessary for informed management and conservation of fisheries resources. We report on the temporal and spatial variation in biomass and density of a hitherto little-studied species of commercial importance, the threadfin porgy Evynnis cardinalis, it was listed as endangered (EN) in a recent International Union for Conservation of Nature (IUCN) red list, on the northern South China Sea continental shelf, using data collected during fisheries surveys from 2014 to 2015. Seasonal variation in the frequency of occurrence of E. cardinalis in trawl samples on this shelf was highest during summer (68.57%) and lowest during winter (31.43%). Average biomass was highest in autumn (33.05 kg·km−2) and density was highest in spring (936 ind·km−2). The highest annual average biomass (41.6 kg·km−2) and density (1021 ind·km−2) occurred off Shantou, and the lowest occurred off Zhanjiang (7.2 kg·km−2 and 165 ind·km−2, respectively); seasonal patterns in density are more similar in waters off Yangjiang and Shantou than elsewhere. The highest annual average biomass occurred at 40 m depth (56.9 kg·km−2), and the highest annual average density (1084 ind·km−2) occurred at 30 m depth. Density of E. cardinalis varied with depth, with lower densities occurring in shallow and deeper waters, and higher densities at intermediate depths.

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Effects of six codend meshes on the size selection of juvenile white croaker (Pennahia argentata) in demersal trawl fishery of the South China Sea

Cited by 3 publications

References 27 publications

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

Carbon Transfer Efficiency and Risk of Fisheries Collapse in Three Large Marine Ecosystems Around China

A review on fishing gear in China: Selectivity and application

Tempo-Spatial Distribution of an Endangered Fish Species, Threadfin Porgy Evynnis cardinalis (Lacepède, 1802), in the Northern South China Sea

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