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 PDF Download

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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

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 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 19

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Book Description
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.

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

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 PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 19

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Book Description
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.

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

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 PDF Author: Canada. Department of Fisheries and Oceans
Publisher: Moncton, N.B. : Department of Fisheries and Oceans
ISBN:
Category :
Languages : en
Pages : 19

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Book Description