Download or read book Evaluation of the Utility of Summer Trawl Surveys 1990 to 1994 in the Shediac Valley NAFO Unit Area 4Tl as an Index of Pre recruit Abundance for Southern Gulf of St Lawrence Cod written by and published by . This book was released on 1995 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper evaluates the potential of a juvenile cod survey as an independent index of pre-recruiting year class strength of southern Gulf of St. Lawrence cod. The evaluation is based on five surveys conducted with a bottom trawl in the Shediac Valley area of the southern Gulf in the summers of 1990 to 1994. Numbers per tow at age for ages 1 to 9 were obtained for all five years of the survey. Two types of analyses were used to attempt to evaluate the utility of the surveys as an index of year class strength: correlation analysis and application of two multiplicative models, an age & year class model and an age, year class, stratum, and age-stratum interaction model.

Download or read book Evaluation of the Utility of Summer Trawl Surveys 1990 to 1994 in the Shediac Valley NAFO Unit Area 4TI as an Index of Pre recruit Abundance for Southern Gulf of St Lawrence Cod written by Canada. Department of Fisheries and Oceans and published by Moncton, N.B. : Department of Fisheries and Oceans. This book was released on 1995 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: