کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9481729 | 1626872 | 2005 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Estimating illegal, unreported and unregulated catch in British Columbia's marine fisheries
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Estimating illegal, unreported and unregulated catch in British Columbia's marine fisheries Estimating illegal, unreported and unregulated catch in British Columbia's marine fisheries](/preview/png/9481729.png)
چکیده انگلیسی
To fully understand the impact of fishing on the marine environment, it is necessary to have an estimate of total extractions from the ecosystem. In addition to nominal fisheries landings and reported discards, which are regulated and monitored, removals will include a certain amount of illegal, unreported and unregulated catch (IUU). This amount, if considered, might profoundly affect our forecasts of stock abundance and safe removal rates. Here, we present preliminary estimates of the quantity of IUU catches over time for the British Columbia salmon and groundfish fleets. Based on influences in the history of the fisheries, and on independent estimates of misreporting, our methodology employed a Monte Carlo routine to determine missing catch with an associated error range. From the 1950s to the 1980s, we estimated that between 10,000 and 20,000Â tonnes of catch went unrecorded every year in the BC salmon and groundfish fisheries. IUU catch increased throughout the 1980s, and by 1990 the amount was probably closer to 30,000Â tonnes per year, equivalent to 18% of recorded landings. At present, less catch is unaccounted for thanks to tighter monitoring and enforcement: about 8000Â tonnes per year, or 6.6% of landings. Values calculated here, using this subjective but transparent methodology, are intended to provide a starting point for further discussion and amendment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 75, Issues 1â3, September 2005, Pages 40-55
Journal: Fisheries Research - Volume 75, Issues 1â3, September 2005, Pages 40-55
نویسندگان
C.H. Ainsworth, T.J. Pitcher,