Download or read book Fishing Effort and Catch per unit effort of the Inshore Herring Fisheries in the Southern Gulf of St Lawrence 1973 1980 written by Shoukry N. Messieh and published by . This book was released on 1981 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Data on fishing effort and catch-per-unit effort for the inshore herring fisheries in the southern Gulf of St. Lawrence in 1973 through 1980 are presented. These data were compiled from all purchase slip records available in the public archives."--Abstract.
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1981 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biennial Review written by Bedford Institute of Oceanography and published by . This book was released on 1981 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book BIO Review written by Bedford Institute of Oceanography and published by . This book was released on 1982 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Changes in Fishing Effort and Catch Rates of Inshore Herring Fisheries in the Southern Gulf of St Lawrence written by Messieh, S. N. (Shoukry N.) and published by [Dartmouth, N.S.] : Canadian Atlantic Fisheries Scientific Advisory Committee. This book was released on 1984* with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long term Variability of Pelagic Fish Populations and Their Environment written by Tsuyoshi Kawasaki and published by Pergamon. This book was released on 1991 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxford; New York : Pergamon Press, 1991.
Download or read book Review of the State of World Marine Fishery Resources written by Food and Agriculture Organization of the United Nations. Marine Resources Service and published by Food & Agriculture Org.. This book was released on 1994 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document provides a review, commentary and tabulations of the main trends that have occurred in exploitation of fisheries resources since the 1970s, largely as they are reflected in the FAO database on fishery landings, supplemented with selected information from the fishery literature. Reviews were prepared separately for the 15 main areas into which FAO divides the world's oceans for statistical purposes. They are then compared from a global perspective to reveal relative trends by species and areas, which are highlighted. Several special topics are reviewed, including tuna and tuna-like species, whales and dolphins, and environmental issues in fisheries.
Download or read book FAO Fisheries Technical Paper written by and published by . This book was released on 1994 with total page 344 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 Southern Gulf of St Lawrence 4T Herring written by and published by . This book was released on 2002 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Herring in the southern Gulf of St Lawrence consist of a spring spawner component and a fall spawner component. This report presents data on the herring fishery (landings, allocation, catch-at-age, weight-at-age) and on the resource status (abundance index, acoustic survey index, total mortality). It also includes an outlook for the 2002 fishery.
Download or read book Changes in Effort Catch per unit effort and Biological Characteristics in the Inshore Herring Fishery at the Magdalen Islands 1970 1980 written by Cleary, Lynn and published by [Dartmouth, N.S.] : Canadian Atlantic Fisheries Scientific Advisory Committee. This book was released on 1981* with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Herring Catch Per Unit Effort in the Magdalens Trap Fishery and Implications for Gulf Herring Stock Assessment written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "It has been suggested, based on a consideration of schooling behaviour and on data from North Sea herring fisheries, that catchability in mobile gear fisheries on schooling pelagic fish stocks increases with decreasing stock size, and therefore that fishing mortality is not proportional to fishing effort in such fisheries (Pope, 1978 MS, most recently). Under this hypothesis, CPUE in mobile gear fisheries would vary little with stock size above a critical lower limit of stock size (Fig. 1). Although not stated by Pope (1978, MS), it appears intuitively reasonable that below a critical stock size both catchability and catch per unit effort would fall off rapidly (Fig. 1). In inshore fixed gear fisheries, on the other hand, CPUE should change in proportion to stock size (Pope, MS, 1978) (Fig. 1). If Pope's hypothesis is correct, FT (terminal fishing mortality) values for cohort analyses calculated from mobile gear effort and fishing mortality may be too low and biomass estimates from the analyses too high"--Introduction.
Download or read book Alewife and Blueback Herring written by Earl L. Bozeman and published by . This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Catch and effort data used in the assessment of herring populations in the southern Gulf of St Lawrence written by and published by . This book was released on 2002 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changes in Effort Catch per unit effort and Biological Characteristics in the Inshore Herring Fishery at the Magdalen Islands 1970 80 written by Lynn Cleary and published by . This book was released on 1981 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document summarizes a study of the herring trap & gillnet fishery in the Magdalen Islands. The main purposes of the study were to determine the fishing effort exerted by these two gears on the herring stock, and to detect changes in the herring population. Data for the study were collected through a questionnaire survey mailed to licensed fishermen in 1980, completed with biological data provided by the St. Andrews Biological Station. Results of the survey include information on landings, fishing experience, number of licenses, characteristics of gear used, fishing effort, and location of traps. Biological data include information on proportion of spring versus fall spawners, length frequency, length & numbers at age, and mean weight. Based on the results, trends in the biological data are discussed.
Download or read book Management of the Herring Fishery in the Southern Gulf of St Lawrence written by and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Herring purse seine fishing activity in the southern Gulf of St Lawrence 1995 1998 written by and published by . This book was released on 2001 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt:
