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Effect of light-emitting diodes (LEDs) on snow crab catch rates in the Barents Sea pot fishery
摘要： Snow crab (Chionoecetes opilio) has become an important species for the Norwegian seafood industry since its first commercial harvest in 2012. However, periodically catch rates can be low, causing a financial strain on the fishery. Thus, improving the catch rate of existing pot designs has the potential to significantly improve the profitability of fishing enterprises. In this study, we investigated whether the addition of low-powered purple and white light-emitting diode (LED) fishing lights inside the pots could improve catch rates of snow crab in the Barents Sea. Results showed that pots with purple lights harvested a 12.8% higher catch per unit effort (CPUE; number of crab per pot) of legal-sized crab, which was significantly more than the control pots (p ? 0.035); pots with white lights did not catch significantly more crab (p > 0.05). Pots equipped with only light (no bait) caught very few crabs and were not considered a viable alternative. Although purple LEDs increased snow crab capture, the economic benefits of using underwater lights in pots remains unclear given the high capital investment required.
关键词： underwater fishing light,Barents Sea snow crab fishery,catchability,invasive species,LEDs
更新于2025-09-11 14:15:04
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Spectral Identification of Native and Non-Native Plant Species for Biodiversity Assessments
摘要： Invasive species are one of the main drivers of biodiversity loss. In the past decade, the development of environmental spectroscopy, both field spectrometers and airborne imaging spectrometers, has allowed progress in identifying individual species from remote sensing data. However, use of environmental spectroscopy for species identification needs understanding at a more fundamental level, especially the development of generalized methodologies and rules for detection and mapping, which is an area of active research today. These issues will be explored using examples from a wide range of habitats and site conditions, towards the development of a robust methodology to identify native and non-native species.
关键词： invasive species,ecosystem function,biodiversity,assessment,hyperspectral
更新于2025-09-09 09:28:46