Journal of Northwest Atlantic Fishery Science最新文献_第8页

Seasonal Movements of Atlantic Herring (Clupea harengus): Results From a Four Year Tagging Study Conducted in the Gulf of Maine and Southern New England 大西洋鲱鱼(Clupea harengus)的季节性运动:在缅因湾和新英格兰南部进行的一项为期四年的标记研究的结果

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-04-28 DOI: 10.2960/J.V40.M577

J. K. Kanwit, D. Libby

{"title":"Seasonal Movements of Atlantic Herring (Clupea harengus): Results From a Four Year Tagging Study Conducted in the Gulf of Maine and Southern New England","authors":"J. K. Kanwit, D. Libby","doi":"10.2960/J.V40.M577","DOIUrl":"https://doi.org/10.2960/J.V40.M577","url":null,"abstract":"This paper presents results from a four year tagging effort on Atlantic herring (Clupea harengus) in the waters off the east coast of the United States. This study was designed to describe seasonal movements and evaluate new live capture methods for mobile gear using an aquarium codend. A total of 85 561 Atlantic herring were tagged and released in two strata; the Gulf of Maine during the summer feeding/spawning period and Southern New England during the winter feeding period. The return rate, adjusted for reporting, was 2.6% and the patterns of returns largely reflected results from previous tagging studies in the US and Canada. The two main contributions of this work to the established body of herring tagging literature are: (1) the identification of current seasonal movements, including the migration of Atlantic herring from Southern New England in the winter to Nova Scotia in the summer, and (2) the implementation of a capture technique for midwater trawl gear and the ability this provided the researchers to successfully tag Atlantic herring on their winter feeding grounds as far south as Cape May, NJ.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"40 1","pages":"29-39"},"PeriodicalIF":0.0,"publicationDate":"2009-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69256147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Cohort-specific Winter Growth Rates of YOY Bluefish, Pomatomus saltatrix, in Northeast Florida Estuaries: Implications for Recruitment 佛罗里达东北部河口y - y蓝鱼的特定群体冬季生长率:对招募的影响

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-02-26 DOI: 10.2960/J.V41.M629

J. Murt, F. Juanes

引用次数: 7

Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua) 环境对东波罗的海鳕鱼(Gadus morhua)繁殖的影响及其对生物参考点的影响

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-02-25 DOI: 10.2960/J.V41.M636

F. Köster, M. Vinther, B. MacKenzie, M. Eero, M. Plikshs

{"title":"Environmental effects on recruitment and implications for biological reference points of Eastern Baltic cod (Gadus morhua)","authors":"F. Köster, M. Vinther, B. MacKenzie, M. Eero, M. Plikshs","doi":"10.2960/J.V41.M636","DOIUrl":"https://doi.org/10.2960/J.V41.M636","url":null,"abstract":"The decline of the Eastern Baltic cod (Gadus morhua) stock from highest to lowest stock levels on record throughout the 1980s and early 1990s was caused by a combination of recruitment failure and increasing fishing pressure at declining stock sizes. The processes driving the reproductive success are largely understood, but the consequences of these changes for fisheries management are far less evident. This includes doubts about the adequacy of the biological reference points presently used to advise on the stock status, and the need of their revision given that environmental changes have affected stock productivity. Long-term projections suggest that under adverse environmental conditions for reproduction, harvesting at fishing mortality determined as precautionary may not lead to a recovery of the stock to a biomass level considered precautionary. Thus, a revision of either the limit fishing mortality or the limit biomass reference point is indicated. However, an accepted methodology to determine these reference points in situations of changing stock productivity or system carrying capacity does not exist. Environmental conditions affecting recruitment matter not only for the determination of limit reference points, but according to long-term simulations also for target fishing mortalities, being central parts of harvest control rules in several management plans.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"41 1","pages":"205-220"},"PeriodicalIF":0.0,"publicationDate":"2009-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69256284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 57

Seasonal Distribution and Movement of Black Sea Bass (Centropristis striata) in the Northwest Atlantic as Determined from a Mark-Recapture Experiment 西北大西洋黑海鲈鱼(Centropristis striata)的季节分布和运动——由标记-再捕获实验确定

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-02-18 DOI: 10.2960/J.V40.M638

Joshua Moser, G. Shepherd

引用次数: 42

Recruitment Variability of Small Pelagic Fish Populations in the Kuroshio-Oyashio Transition Region of the Western North Pacific 北太平洋西部黑潮-孤潮过渡区小型远洋鱼类种群的补充变异

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-01-30 DOI: 10.2960/J.V41.M635

Yoshirô Watanabe

{"title":"Recruitment Variability of Small Pelagic Fish Populations in the Kuroshio-Oyashio Transition Region of the Western North Pacific","authors":"Yoshirô Watanabe","doi":"10.2960/J.V41.M635","DOIUrl":"https://doi.org/10.2960/J.V41.M635","url":null,"abstract":"Climatic and ecosystem changes in the transition region between the subarctic Oyashio and the subtropical Kuroshio Extension fronts may be the key to understanding recruitment variability of small pelagic fish populations in the Pacific waters off Japan. The transition region is characterized by complex oceanographic structure with the meandering fronts, eddies and streamers creating large spatial and temporal variability in the environment. Juveniles of small pelagic fishes such as Japanese sardine (Sardinops melanostictus), Pacific saury (Cololabis saira), and Japanese anchovy (Engraulis japonicus) migrate from the subtropical Kuroshio Current area to the subarctic Oyashio Current area across the transition region. A precipitous decline in number of age 0 recruits of Japanese sardine after the end of 1980s appears to be related to the extremely high mortality rate of young-of-the-year fish in the transition region. In contrast, populations of Pacific saury and Japanese anchovy increased after 1988. These synchronous changes in populations seem to be associated with the weakening of the Aleutian Low Pressure in the North Pacific and weakening of the Oyashio Current in winter, and a sea surface temperature (SST) rise in the Kuroshio-Oyashio transition region in spring. The contrasting responses of the fish populations to the SST rise can be explained by different temperature preference in terms of growth rate in larval and early juvenile stages; cool temperatures are preferred by sardine and warm temperatures are preferred by saury and anchovy.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"41 1","pages":"197-204"},"PeriodicalIF":0.0,"publicationDate":"2009-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69256265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Dispersion of Eggs, Larvae and Pelagic Juveniles of White Hake (Urophycis tenuis) in Relation to Ocean Currents of the Grand Bank: A Modelling Approach 白鳕卵、幼鱼及远洋幼鱼随大滩洋流的分布:模拟方法

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-01-22 DOI: 10.2960/J.V41.M627

G. Han, D. Kulka

{"title":"Dispersion of Eggs, Larvae and Pelagic Juveniles of White Hake (Urophycis tenuis) in Relation to Ocean Currents of the Grand Bank: A Modelling Approach","authors":"G. Han, D. Kulka","doi":"10.2960/J.V41.M627","DOIUrl":"https://doi.org/10.2960/J.V41.M627","url":null,"abstract":"White hake (Urophycis tenuis) is a temperate demersal fish species distributed in the northwest Atlantic. On the Grand Bank, it is concentrated mainly to the southwest where water temperatures are warmest. Survey data indicate that mature adult females aggregate on the southwest (SW) Grand Bank slope in spring and first-year juveniles settle on the southern, shallow Grand Bank in autumn. Dispersion patterns and survival potential of eggs, larvae and juveniles were investigated with respect to the effects of location (horizontal and vertical) and timing (monthly) of spawning under monthly-mean circulation fields, M2 tidal currents and associated turbulent mixing computed from a three-dimensional regional ocean circulation model. The results indicate that releases below the surface Ekman layer and in late spring have the highest chances for juveniles to settle in the southern Grand Bank nursery area in autumn. On an interannual scale, the strong recruitment of the 1999 yearclass has been used as an example to examine the potential linkage between recruitment and the strength of the Labrador Current. A weak along-slope current and strong on-bank flow contributed to the strong recruitment of the 1999 year-class.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"41 1","pages":"183-196"},"PeriodicalIF":0.0,"publicationDate":"2009-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69256594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Size at Sexual Maturity in the Female Red King Crab (Paralithodes camtschaticus) in a Newly Settled Population in the Barents Sea, Norway 挪威巴伦支海新定居种群中雌性红王蟹性成熟期的大小

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-01-15 DOI: 10.2960/J.V41.M633

A. M. Hjelset, J. H. Sundit, E. M. Nilssen

{"title":"Size at Sexual Maturity in the Female Red King Crab (Paralithodes camtschaticus) in a Newly Settled Population in the Barents Sea, Norway","authors":"A. M. Hjelset, J. H. Sundit, E. M. Nilssen","doi":"10.2960/J.V41.M633","DOIUrl":"https://doi.org/10.2960/J.V41.M633","url":null,"abstract":"The aim of this study was to estimate and discuss the variation in the 50% ovigerous length (OL50) of female red king crab (Paralithodes camtschaticus) sampled from three Norwegian fjords in the Barents Sea. Egg status from 19 872 females were collected and analysed from 1994–2007. Females were defined as sexually mature based on the observed presence of eggs or past presence of eggs (egg remnants). Differences in the OL50 value according to the sample year and fjord were illustrated, but were to a large degree caused by large numbers of young females representing strong year-classes that passed through the size distribution over time. In Varangerfjorden, the mean OL50 was 108.9 ± 0.2 mm CL for a 14 year sampling period. The mean OL50 estimates were 108.7 ± 0.3 mm and 111.8 ± 0.5 mm CL for a nine and six year sampling period in Tanafjorden and Laksefjorden, respectively. Russian scientists successfully introduced the red king crab into the Barents Sea during 1960–1969 with the aim of establishing a fishery. The red king crab stock has since grown and extended its distribution. Norway started fishing red king crab in 1994, and the harvest rate has increased gradually since the onset of the commercial fishing. Female red king crab appears to mature at a larger size in the Barents Sea than those found in its native areas.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"41 1","pages":"173-182"},"PeriodicalIF":0.0,"publicationDate":"2009-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69256236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males 多胎雌美纳蟹(Chionoecetes bairdi)近期与雄蟹接触或不接触受精卵的繁殖成功率

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-01-08 DOI: 10.2960/J.V41.M611

J. Webb

{"title":"Reproductive Success of Multiparous Female Tanner Crab (Chionoecetes bairdi) Fertilizing Eggs With or Without Recent Access to Males","authors":"J. Webb","doi":"10.2960/J.V41.M611","DOIUrl":"https://doi.org/10.2960/J.V41.M611","url":null,"abstract":"Sperm storage in female crabs is assumed to provide resiliency in population reproductive potential for exploited crab stocks with male-only harvest restrictions. However, contrasting results have been reported for the reproductive success of female Tanner crab (Chionoecetes bairdi) relying on stored sperm for fertilization. Ovigerous multiparous female C. bairdi were collected and held in the laboratory in the absence of males from hatching to extrusion or collected after hatching and extrusion of a subsequent clutch in situ in Glacier Bay, Alaska. Females were classified into two groups based on extrusion site, LE (laboratory) or FE (field). Mating of multiparous females was important for maintenance of reproductive potential as sperm reserves were likely insufficient for full fertilization of an additional egg clutch from stored sperm in 44% of LE females. High incidence of fresh grasping marks for FE (97%) versus LE (4%) females and significantly higher sperm reserves indicated that most FE females were likely to have recently mated. Mean postextrusion spermathecal load and sperm cell counts increased significantly from 0.21 to 0.44 g and 2.00 × 107 to 9.35 × 107, respectively, between LE and FE females (p 99%), with similar fecundity. Characterization of spatiotemporal trends in mating status, sperm reserves and egg production in C. bairdi may be valuable for understanding natural variability in reproduction and possible fishery effects on population reproductive potential.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"41 1","pages":"163-172"},"PeriodicalIF":0.0,"publicationDate":"2009-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69255824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

An Individual-based Model for Reviewing Marine Reserves in the Light of Fisheries-induced Evolution in Mobility and Size at Maturation 基于渔业诱导的海洋保护区成熟时流动性和规模演化的个体模型

Journal of Northwest Atlantic Fishery Science Pub Date : 2009-01-07 DOI: 10.2960/J.V41.M624

T. Miethe, J. Pitchford, C. Dytham

{"title":"An Individual-based Model for Reviewing Marine Reserves in the Light of Fisheries-induced Evolution in Mobility and Size at Maturation","authors":"T. Miethe, J. Pitchford, C. Dytham","doi":"10.2960/J.V41.M624","DOIUrl":"https://doi.org/10.2960/J.V41.M624","url":null,"abstract":"Size-selective fishing mortality may induce evolutionary changes to smaller size at maturation in fish stocks. Marine reserves can be a useful management tool dealing with the ecological and evolutionary effects of fisheries. We examine the effect of size-selective harvesting and the implementation of marine reserves on the evolution of size at maturation using individual-based models. The mobility of individual fish is included as an evolving trait to account for possible behavioural changes in dispersal patterns. The evolutionary change in maturation size can be prevented inside the reserve, leading to higher abundance there. The results show the benefit of reserves on yield, especially at intermediate movement probability. Reserve implementation may cause mobility of individuals to decrease, increasing the possibility of local adaptation in maturation strategy. Evolutionary changes in mobility through marine reserve implementation increase the protection from evolution to small maturation size within the reserve, but may lead to overestimation of yield benefits due to reduced spill-over.","PeriodicalId":16669,"journal":{"name":"Journal of Northwest Atlantic Fishery Science","volume":"41 1","pages":"151-162"},"PeriodicalIF":0.0,"publicationDate":"2009-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69256463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Initial Genetic Evidence of Population Structure of Greenland Halibut (Reinhardtius hippoglossoides) in the Northwest Atlantic 西北大西洋格陵兰大比目鱼种群结构的初步遗传证据

Journal of Northwest Atlantic Fishery Science Pub Date : 2008-12-24 DOI: 10.2960/J.V40.M637

C. Pomilla, Melissa Lindsay

引用次数: 11