Statistical estimation of mean values of fish stock indicators from trawl surveys
نویسندگان
چکیده
منابع مشابه
Estimation of fish abundance indices based on scientific research trawl surveys.
The fish abundance index over an ocean region is defined here to be the integral of expected catch per unit effort (CPUE), approximated by the sum of expected CPUE over grid squares. When trawl surveys are done within grid squares selected according to a probability sampling design, several other sources of variation such as the fish population dynamics and the catching process are also involve...
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ژورنال
عنوان ژورنال: Aquatic Living Resources
سال: 2012
ISSN: 0990-7440,1765-2952
DOI: 10.1051/alr/2012004