Studies of the Distribution and Abundance of Juvenile Groundfish in the Northwest Gulf of Alaska, 1980-82. Part 2. Biological Characteristics in the Extended Region

摘要

Juvenile groundfish were studied in the northwestern Gulf of Alaska to determine interannual variations in distribution and abundance, evaluate the feasibility of measuring year-class strengths, and obtain other information on this poorly understood life history stage. Bottom trawl data were collected at a total of 749 stations during three surveys conducted in the late summer periods of 1980-82. The report describes results from the entire sampling coverage in each of the 3 yr. Walleye pollock, Theragra chalcogramma, was present as young of the year and 1-yr-olds. Other principal groundfish and age groups were as follows: Pacific cod, Gadus macrocephalus, 0-group and 1-yr-olds; sablefish, Anoplopoma fimbria, 1-yr-olds; arrowtooth flounder, Atheresthes stomias.