3/28/2023 0 Comments Global tracking![]() Kroodsma et al., Science 359, 904 (2018) and their supplementary materials.Ģ. Thus, we suggest that production inside the zone is priority cancellation for giving reasonable survival chance to not only larval fish but also our next generation.ġ.ĝ. We are glad to see our government is canceling fuel subsidies for fishing vessels step by step(6-7). work may open window to view actual fishing pressure along China's coastal waters. ![]() Therefor, we infer that production inside the zone has higher fuel cost and carbon footprint and has heavier harm to larval fish than those of the outside in general. Our long-term surveys also indicate that main spawning and nursing grounds along China's coastal waters are located within the zone (5). Why does the apparently much higher fishing effort inside the zone produce nearly same yield compared with that of the outside? One possible explanation is that firstly most of harvests inside the zone are juvenile fish or no fish, and secondly there are more fishing vessels (possible less in length and power) inside the zone than those of the outside in quantity, which are indetectable throughout the Fisheries Yearbook. However, Kroodsma's map suggest entirely different fishing effort on both sides (Fig.1). Thus, we consider that capture yields on both sides are nearly equate. Actual yields on both sides are very difficult to count due to disaggregated catch data (1). We know that not all other type of fishing (except trawler fishing) make production only within the zone and there is also a small production by trawl inside the zone illegally. As we calculate a ratio of the production by trawler fishing to the total domestic marine catches of China from 2012 to 2016 is 47.71%, 47.96%, 47.77%, 47.22% and 46.88%, respectively, according to the China Fisheries Yearbook (4). ![]() " the prohibited fishing zone", Fig.1) by the Fisheries Law of China (3). Because all commercial trawler fishings are forbidden in the west of the line (i.e. We argue that the statistical capture productions (in weight) on both sides of the prohibited fishing line in China's coastal waters seem not to match with this fishing effort (Fig.1). identify vessel characteristics and analyse signal positions, training samples, build model, then indicate annual intensity of fishing effort (Hours of fishing km-2 yr-1) based on vessel movement patterns(2012-2016)as determined with the Automatic Identification System (1-2). In their report (, p.904), Kroodsma et al. ![]()
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