Standardized catch per unit effort in minke whaling in Norwegian waters, 1952-1983 and 1993-2004
نویسندگان
چکیده
We construct a catch per unit effort (CPUE) index for minke whales caught in the E-areas of north-eastern Atlantic, adjusted for boat efficiency and spatial effects. The index is interpreted as an unsmoothed relative index of abundance, also including variation in catch conditions due to weather, migration and local clustering of minke whales. Norwegian minke whaling was interrupted from 1984 to 1992. Two series are therefore constructed, one for the period 1952-1983 and another for the period 1993-2004. The estimated index value for 1983 is 63% of the value in 1952, while the estimated index value for 2004 is 186% of the value in 1993.
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