Abundance indices of Atlantic herring (Clupea harengus) from the southern Gulf of St. Lawrence based on the September multispecies bottom trawl survey / Tobie J. Surette. : Fs70-5/2016-064E-PDF
"Fishery-independent abundance indices for the fall spawner component of Atlantic herring (Clupea harengus), one for all large fish (≥ 20 cm) and the other disaggregated by age for fall spawning fish only, are derived from the September multi-species bottom trawl survey in NAFO Div. 4T. Using a Bayesian approach, over-dispersion in the data is handled via a negative binomial error with log-linear mean and additive hierarchical priors over year, survey stratum, time of day, fish age and interaction terms. While indices remained highly variable, cohort tracking was apparent in the age- disaggregated index and inter-cohort correlations were moderate for ages 4 to 7 years. While uncertainty remains as to other types of systematic annual changes, there was little evidence of change in day-night catchability patterns of Atlantic herring over time"--Abstract, p. vi.
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| Ministère/Organisme | Canada. Department of Fisheries and Oceans. Canada. Ecosystems and Oceans Science. Canadian Science Advisory Secretariat. Gulf Fisheries Centre (Canada) |
|---|---|
| Titre | Abundance indices of Atlantic herring (Clupea harengus) from the southern Gulf of St. Lawrence based on the September multispecies bottom trawl survey / Tobie J. Surette. |
| Variante du titre | Title at head of French abstract: Indices de l'abondance du hareng de l’Atlantique (Clupea harengus) du sud du golfe du Saint-Laurent tirés du relevé plurispécifique au chalut de fond réalisé en septembre |
| Titre de la série | Canadian Science Advisory Secretariat research document, 1919-5044 ; 2016/064, Gulf Region |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Cover title. “Gulf Fisheries Centre.” “October 2016.” Includes bibliographical references (p. 12-13). Includes abstract in French. |
| Information sur la publication | Ottawa : Fisheries and Oceans Canada, c2016. |
| Auteur / Contributeur | Surette, T. J. |
| Description | vii, 33 p. : col. maps |
| Numéro de catalogue |
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| Descripteurs | Fisheries resources Salt water fish Fishing area Fisheries management |
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