Download or read book Estimation of Local Spawning Biomass of Atlantic Herring from Acoustic Data Collected During Fall Commercial Gillnet Fishing Activities in the Southern Gulf of St Lawrence NAFO Div 4T written by T. J Surette and published by . This book was released on 2016 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Modelling Results for the Assessment of Atlantic Herring Clupea Harengus Stocks in the Southern Gulf of St Lawrence NAFO Division 4T to 2015 written by D. P. Swain and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment Framework for Fall spawning Atlantic Herring Clupea Harengus in the Southern Gulf of St Lawrence NAFO Div 4T written by D. P. Swain and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book History of the Assessment of Southern Gulf of St Lawrence Atlantic Herring Clupea Harengus Stocks to 2013 written by Caroline LeBlanc and published by . This book was released on 2016 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This document was part of the information presented at a regional peer review of the assessment framework for the fall spawning component of Atlantic herring in the southern Gulf of St. Lawrence (sGSL) (NAFO Div. 4T). The stock area for the sGSL Atlantic herring extends from the north shore of the Gaspe Peninsula (Quebec) to the northern tip of Cape Breton Island (Nova Scotia) and includes the Magdalen Islands. The two seasonal herring spawning components that are assessed for the sGSL are spring spawners and fall spawners. SGSL herring are harvested by an inshore gillnet fleet fishing in coastal waters and a purse seine fleet of a maximum of 12 seiners (>65') fishing in deeper water. Since 1999, fall spawners have comprised 70% or more of the total catch in the sGSL. Market conditions have played a large role in determining catch levels in this fishery. There are approximately 3,000 herring bait licenses for personal use in the sGSL. In 2012 and 2013, there was an average of 712 actively fishing gillnet commercial licenses out of a possible total of 2,590 license holders. The assessment for each herring component currently provides a F0.1 fishing level calculation. Gillnet catch-per-unit-effort (CPUE) and acoustic survey indices were used to calibrate the population models. Spawning stock biomass reference points consistent with the Precautionary Approach were derived for both spawning components in 2005. The latest assessment of the sGSL herring stocks in 2013 showed pathological problems including blocks of residuals and large retrospective patterns when fitting the current population model. Similar problems were encountered in past assessments of the sGSL herring stocks"--Abstract.

Download or read book Assessment of the NAFO Division 4T Southern Gulf of St Lawrence Atlantic Herring Clupea Harengus Stocks in 2013 written by and published by . This book was released on 2015 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The document presents the assessments of the spring spawning and fall spawning Atlantic herring components from the southern Gulf of St. Lawrence, NAFO Div. 4T. The 2013 assessment of the spring spawner component was based on a sequential population analysis calibrated on both the age-disaggregated gillnet catch rate (CPUE) and acoustic survey indices. The 2013 assessment of the fall spawner component was based on two sequential population analyses calibrated on an age-disaggregated gillnet catch rate (CPUE) index and an acoustic index for ages 2 and 3.

Download or read book Updated Assessment to 2014 of the Fall Spawning Component of Atlantic Herring Clupea Harengus in the Southern Gulf of St Lawrence NAFO Div 4T and Advice for the 2015 Fishery written by and published by . This book was released on 2015 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Updated Assessment to 2014 of the Fall Spawning Component of Atlantic Herring Clupea Harengus in the Southern Gulf of St Lawrence NAFO Div 4T and Advice for the 2015 Fishery written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gillnet fleet harvests almost solely the spring spawner component in the spring, except for June, and almost solely the fall spawner component in the fall. [...] Although the standard annual survey area occurs in the Chaleurs-Miscou area, the acoustic index is considered to be representative of the abundance of herring at the sGSL stock level. [...] The selectivities in the fishery were used in the modelling of abundance and in the estimation of the catchability coefficient at age for each region. [...] The area of the bubble is proportional to the number of fish in the catch at age. [...] Circles show the predicted mean recruitment rates and shading the central 95% interval of the rates used for the projections of SSB at the start of the year in 2016 for the sGSL overall.

Download or read book Background and Data Inputs for Models Evaluated as Part of the 2015 Southern Gulf of St Lawrence Fall spawning Herring Assessment Framework Review written by H. P. Benoît and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of the Southern Gulf of St Lawrence NAFO DIV 4T Spring and Fall Spawner Components of Atlantic Herring Clupea Harengus with Advice for the 2016 and 2017 Fisheries written by Canadian Science Advisory Secretariat and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of the Southern Gulf of St Lawrence NAFO Div 4T Spring and Fall Spawner Components of Atlantic Herring Clupea Harengus with Advice for the 2018 and 2019 Fisheries written by and published by . This book was released on 2018 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of the Southern Gulf of St Lawrence NAFO Division 4T 4Vn Spring and Fall Spawner Components of Atlantic Herring Clupea Harengus with Advice for the 2020 and 2021 Fisheries written by and published by . This book was released on 2020 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Atlantic Herring in NAFO Division 4T 1986 written by Chadwick, E. M. P. (Edward Michael Pakenham) and published by [Dartmouth, N.S.] : Canadian Atlantic Fisheries Scientific Advisory Committee. This book was released on 1986* with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Estimation of the Herring Spawning Biomass Near Isle Verte in the St Lawrence Estuary from an Intensive Larval Survey written by Auger, F and published by Dartmouth, N.S. : Canadian Atlantic Fisheries Scientific Advisory Committee. This book was released on 1980* with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Atlantic Herring in NAFO Division 4T 1986 written by Edward Michael Pakenham Chadwick and published by . This book was released on 1986 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction to this assessment of the southern Gulf of St. Lawrence herring stock reviews the characteristics of the herring fishery. The assessment then presents the input data (landings, four types of abundance indices calculated from fishery catch rates & research survey data, catch & weight at age from fishery sampling, partial recruitment, natural & fishing mortality) and the assessment results for both spring & fall spawners. Finally, a prognosis for the stock to 1989 is presented and research needs are outlined.

Download or read book Assessment of the Southern Gulf of St Lawrence NAFO DIV 4T Spring and Fall Spawner Components of Atlantic Herring Clupea Harengus with Advice for the 2016 and 2017 Fisheries written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlantic herring in the southern Gulf of St. Lawrence are comprised of spring spawning and fall spawning components which are considered to be distinct stocks and as such assessed separately.

Download or read book Assessment of the Southern Gulf of St Lawrence NAFO Division 4TVn Spring and Fall Spawner Components of Atlantic Herring Clupea Harengus with Advice for the 2022 and 2023 Fisheries written by and published by . This book was released on 2022 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Atlantic Herring in NAFO Division 4T 1990 written by and published by . This book was released on 1991 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides an assessment of the 1990 Atlantic herring fishery in the southern Gulf of Saint Lawrence using catch-at- age matrices and gillnet catch rates for spring and fall spawners. It provides estimates of stock size as well as projections for the stock to 1992.