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020 |a9780660796789
040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
043 |an-cn-nf|aln-----
045 |ay2y2
0861 |aFs97-6/3733E-PDF
1001 |aSanto, Mélanie, |eauthor.
24510|aDeveloping a gillnet based abundance-at-age index for 4RSw Atlantic herring / |cby Mélanie Santo, Elisabeth Van Beveren and Kim Émond.
264 1|aMont-Joli, QC : |bRegional Sciences Branch, Quebec region, Pelagic and Ecosystemic Sciences Division, Fisheries and Oceans Canada, Maurice Lamontagne Institute, |c2025.
264 4|c©2025
300 |a1 online resource (v, 38 pages) : |billustrations (chiefly colour), colour map.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aCanadian technical report of fisheries and aquatic sciences, |x1488-5379 ; |v3733
504 |aIncludes bibliographical references (pages 12-13).
5203 |a"In 2021, a new experimental gillnet survey was started in Northwest Atlantic Fisheries Organization (NAFO) divisions 4Sw and 4R in collaboration with local harvesters, with the goal of developing a new index of spring and fall spawning Atlantic herring (Clupea harengus). This document outlines the survey design, proposes an analytical approach for estimating abundance-at-age indices, and provides an initial assessment of index quality. A new gillnet selectivity model was developed to convert observed length-specific catch rates across multiple mesh sizes into stock abundance-at-length, which was transformed into abundance-at-age using age-length keys. The resulting age compositions successfully tracked dominant cohorts, appeared robust against sample variability in space and time, and aligned with other independent data sources. While the indices appear promising for informing age composition, estimates of overall abundance remain uncertain in part due to limited time series lengths. Additional years of data will help with index validation and clarify its role in future assessments"--Abstract, page iv.
546 |aIncludes abstracts in English and French.
650 0|aAtlantic herring|zNewfoundland and Labrador|zAtlantic Coast.
650 0|aFish stock assessment|zNewfoundland and Labrador|zAtlantic Coast.
650 0|aGillnetting|zNewfoundland and Labrador|zAtlantic Coast.
650 6|aHareng|zTerre-Neuve-et-Labrador|zAtlantique, Côte de l'.
650 6|aRessources halieutiques|xÉvaluation|zTerre-Neuve-et-Labrador|zAtlantique, Côte de l'.
650 6|aPêche au filet maillant|zTerre-Neuve-et-Labrador|zAtlantique, Côte de l'.
7101 |aCanada. |bDepartment of Fisheries and Oceans, |eissuing body.
7102 |aMaurice Lamontagne Institute, |eissuing body.
830#0|aCanadian technical report of fisheries and aquatic sciences ;|v3733.|w(CaOODSP)9.504449
85640|qPDF|s2.65 MB|uhttps://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-3733-eng.pdf