Effect of artificial lights on catch efficiency and capture patterns in Asian paddle crab (Charybdis japonica) gillnet fishery

Yu, Mengjie; Herrmann, Bent; Cerbule, Kristine; Liu, Changdong; Zhang, Liyou; Tang, Yanli

doi:10.1016/j.rsma.2023.103101

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…The visual nerves of coleoidea are sensitive to blue-green light [ 33 ]. In the first experiment, an appropriate cyan light increase into white light can significantly increase the catch of coleoidea, which is similar to the results of many other fish species [ 34 , 35 ]. In the second experiment, replacing all white LED lamps with cyan LED lamps results in the cyan light in the water around the vessel was too strong, and Loligo chinensis may gather in a slightly dimmer range which is slightly farther from the fishing vessel.…”

Section: Discussionsupporting

confidence: 80%

Analysis of catch rates of LED lamps using on the falling-net fishing vessels in South China Sea

Wang,

Chen,

Xiong

et al. 2024

PLoS ONE

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Falling nets are a type of fishing gear that appeared and developed rapidly in the northern of South China Sea in the early 1990s. We have developed Light-emitting diode (LED) fishing lamps to replace metal halide (MH) lamps that reduce fuel consumption without reducing the catches. We conducted marine light-fishing experiments in the northern South China Sea during September 20 to 26, 2019 and August 29 to 31, 2021. The results in the first fishing experiment show that there is no significant change in catch of the falling-net fishing vessel when the white LED lamps (with a total power of 36 kW) were used instead of MH lamps (with a total power of 120 kW). Coleoidea catches of the falling-net fishing vessel increased significantly when white LED lamps (with a total power of 36 kW) and cyan LED lamps (with a total power of 6.0 kW) were used. The results in the second fishing experiment show that the total weight of catches of the cyan LED fishing lamps is more than that of the white LED fishing lamps, and the cyan LED light can attract Penaeus merguiensis, Thryssa dussumieri and Sardinella zunasi more effectively than the white LED light.

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Section: Discussionsupporting

confidence: 80%

Analysis of catch rates of LED lamps using on the falling-net fishing vessels in South China Sea

Wang,

Chen,

Xiong

et al. 2024

PLoS ONE

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Abundance and Distribution of Blue Swimmer Crab in Response to Environmental Variation Across Two Contrasting Estuaries

Hanamseth,

Schilling,

Johnson

et al. 2024

Estuaries and Coasts

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Portunid crabs are an iconic, high value species in NSW, but catches are highly variable in space and time. Substantial variation in biomass is observed in both exploited and unfished populations, and environmental effects on distribution and abundance are an important factor contributing to this variability. Predicting and responding to this variability is a challenge for management and sustainability of exploited populations. We examine spatial and temporal variation in Blue Swimmer Crab (Portunus armatus) populations, over a 2.5 year trapping survey in two temperate estuaries that differ in tidal flow and riverine input. Specifically, monthly catch rates and distribution throughout the estuary are examined alongside variation in temperature and conductivity. In Wallis Lake, the shallower estuary with a restricted entrance, both water temperature and conductivity impacted abundance and distribution of crabs but there was no evidence that pulses of freshwater flow had a major impact. For a 10 °C increase in temperature the population on average shifted ~ 700 m closer to the ocean. Males were consistently located slightly further into the estuary compared to females, but there was no convincing evidence of estuarine egression in response to lower salinity. In Port Stephens, the deeper, tidal estuary, water temperature and conductivity also impacted abundance, but while males were more dispersed than females, the distribution of crabs within the estuary did not appear to be influenced by temperature, conductivity or flow. These results highlight the links between nuanced environmental relationships and estuarine geomorphology for Blue Swimmer Crab.

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Effect of artificial lights on catch efficiency and capture patterns in Asian paddle crab (Charybdis japonica) gillnet fishery

Cited by 2 publications

References 37 publications

Analysis of catch rates of LED lamps using on the falling-net fishing vessels in South China Sea

Analysis of catch rates of LED lamps using on the falling-net fishing vessels in South China Sea

Abundance and Distribution of Blue Swimmer Crab in Response to Environmental Variation Across Two Contrasting Estuaries

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