Estimation of Fishing Vessel Numbers Close to the Terminator in the Pacific Northwest Using OLS/DMSP Data
Squid (Ommastrephes bartramii) is a kind of economic fishery resources. Artificial light at night attracts and aggregates fish and squid because it mimics light produced by bioluminescent marine animals. The fish men use lamps to aggregate squid for squid
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Abstract. Squid (Ommastrephes bartramii) is a kind of economic fishery resources. Artificial light at night attracts and aggregates fish and squid because it mimics light produced by bioluminescent marine animals. The fish men use lamps to aggregate squid for squid jigging. So the squid fishing vessels can be detected by the sensor of Operational Linescan System (OLS) on Defense Meteorological Satellite Program (DMSP). This article mainly used OLS shimmer data from DMSP-F18 satellite covering the Pacific northwest ocean and estimated the quantity of squid jigging fishing vessels close to the terminator to expound the method that people can utilize the night-time satellite remote sensing data to estimate the quantity of light-trapping fishing vessels. Keywords: OLS/DMSP monitoring
Squid
The Pacific northwest
Fishing vessels
1 Introduction Nearly half of the aquatic products human require in the world mainly come from ocean fishing. Taking effective monitoring, control and supervision on fishing vessels and fishing activities is conductive to regulating the operation of fishing vessels and protecting fishery resources and ecological environment. Squid (Ommastrephes bartramii) is the ocean important cephalopod of economic value, mainly in temperate and subtropical waters of the three oceans, currently concentrated in commercial exploitation of waters in the Pacific Northwest. The fish men used lamps to lure Squid aggregation for squid jigging. Major fishing countries and regions are the Chinese mainland, China’s Taiwan Province and Japan. In general, satellite sensors mainly obtain the solar radiation signal of surface reflection. While the night-time satellite sensors use photomultiplier and utilize the strong ability of photoelectric magnification, so these night-time satellite sensors can detect radiation lower than visible channel as usual. Thus night-time satellite sensors can work and collect radiation signal produced by night lights, firelight and so on. © Springer Nature Singapore Pte Ltd. 2017 H. Yuan et al. (Eds.): GRMSE 2016, Part I, CCIS 698, pp. 321–327, 2017. DOI: 10.1007/978-981-10-3966-9_36
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Light-trapping fishing way is a kind of important fishing way of Chinese pelagic fishery, mainly used in cephalopod fishing. For instance, China carried out catching of squid in the Pacific northwest Ocean, and light falling-net fishing has developed rapidly in recent years in the area of the South China Sea. Light-trapping fishing is a fishing method which makes use of cephalopods’ phototaxis using fish lamp light, cooperates with fishing tools such as automatic line machine to trap. Light-trapping fishing way is generally used in the evening. The working way is static fishhook fishing or falling-net fishing and the fishing vessels don’t produce wake current. So, visible spectral remote sensing can’t monitor the fishing vessels and wake current in the evening. Therefore, it is important to find a new way that people can conduct remote sensing monitoring effectively and estimate the number of regional fishing vessels
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