Atlantic Cod, Haddock, Pollock United States

Total Page:16

File Type:pdf, Size:1020Kb

Atlantic Cod, Haddock, Pollock United States Atlantic Cod, Haddock, Pollock Gadus morhua, Melanogrammus aeglefinus, Pollachius virens ©Monterey Bay Aquarium United States Bottom trawl, Bottom gillnet, Bottom longline, Handline November 6, 2013 Sam Wilding, Seafood Watch staff Disclaimer Seafood Watch® strives to ensure all our Seafood Reports and the recommendations contained therein are accurate and reflect the most up‐to‐date evidence available at time of publication. All our reports are peer‐ reviewed for accuracy and completeness by external scientists with expertise in ecology, fisheries science or aquaculture. Scientific review, however, does not constitute an endorsement of the Seafood Watch program or its recommendations on the part of the reviewing scientists. Seafood Watch is solely responsible for the conclusions reached in this report. We always welcome additional or updated data that can be used for the next revision. Seafood Watch and Seafood Reports are made possible through a grant from the David and Lucile Packard 2 Final Seafood Recommendation Stock / Fishery Impacts on Impacts on Management Habitat and Overall the Stock other Spp. Ecosystem Recommendation Atlantic cod: Georges Bank Red (1.41) Green (5.00) Yellow (3.00) Green (3.57) Good Alternative United States Georges Bank (2.950) ‐ Handline Atlantic cod: Gulf of Maine Red (1.41) Red (2.00) Yellow (3.00) Green (3.57) Avoid (2.346) United States Gulf of Maine ‐ Handline Haddock: Georges Bank Green (5.00) Red (1.41) Yellow (3.00) Green (3.57) Good Alternative United States Georges Bank (2.950) ‐ Handline Haddock: Gulf of Maine Red (2.00) Red (1.41) Yellow (3.00) Green (3.57) Avoid (2.346) United States Gulf of Maine ‐ Handline Atlantic cod: Gulf of Maine Red (1.41) Red (1.34) Yellow (3.00) Yellow (3.12) Avoid (2.054) United States Gulf of Maine ‐ Large mesh bottom gillnet Atlantic pollock Green (5.00) Red (1.34) Yellow (3.00) Yellow (3.12) Good Alternative United States Georges Bank (2.816) ‐ Large mesh bottom gillnet Atlantic cod: Georges Bank Red (1.41) Red (1.34) Yellow (3.00) Yellow (3.12) Avoid (2.054) United States Georges Bank ‐ Large mesh bottom gillnet Atlantic cod: Georges Bank Red (1.41) Red (1.27) Yellow (3.00) Yellow (2.60) Avoid (1.935) United States Georges Bank ‐ Large mesh bottom trawl Atlantic cod: Gulf of Maine Red (1.41) Red (1.27) Yellow (3.00) Yellow (2.60) Avoid (1.935) United States Gulf of Maine ‐ Large mesh bottom trawl Haddock: Georges Bank Green (5.00) Red (1.27) Yellow (3.00) Yellow (2.60) Good Alternative United States Georges Bank (2.654) ‐ Large mesh bottom trawl Haddock: Gulf of Maine Red (2.00) Red (1.27) Yellow (3.00) Yellow (2.60) Avoid (2.111) United States Gulf of Maine ‐ Large mesh bottom trawl Atlantic pollock Green (5.00) Red (1.27) Yellow (3.00) Yellow (2.60) Good Alternative United States Georges Bank (2.654) ‐ Large mesh bottom trawl Atlantic cod: Georges Bank Red (1.41) Red (1.34) Yellow (3.00) Yellow (3.12) Avoid (2.054) United States Georges Bank ‐ Longline, Bottom Atlantic cod: Gulf of Maine Red (1.41) Red (1.34) Yellow (3.00) Yellow (3.12) Avoid (2.054) United States Gulf of Maine ‐ Longline, Bottom 3 Haddock: Georges Bank Green (5.00) Red (1.34) Yellow (3.00) Yellow (3.12) Good Alternative United States Georges Bank (2.816) ‐ Longline, Bottom Haddock: Gulf of Maine Red (2.00) Red (1.34) Yellow (3.00) Yellow (3.12) Avoid (2.240) United States Gulf of Maine ‐ Longline, Bottom Atlantic pollock Green (5.00) Red (1.34) Yellow (3.00) Yellow (3.12) Good Alternative United States Gulf of Maine (2.816) ‐ Large mesh bottom gillnet Atlantic pollock Green (5.00) Red (1.27) Yellow (3.00) Yellow (2.60) Good Alternative United States Gulf of Maine (2.654) ‐ Large mesh bottom trawl Scoring note – Scores range from zero to five where zero indicates very poor performance and five indicates the fishing operations have no significant impact. Final Score = geometric mean of the four Scores (Criterion 1, Criterion 2, Criterion 3, Criterion 4). Best Choice = Final Score between 3.2 and 5, and no Red Criteria, and no Critical scores Good Alternative = Final score between 2.2 and 3.199, and Management is not Red, and no more than one Red Criterion other than Management, and no Critical scores Avoid = Final Score between 0 and 2.199, or Management is Red, or two or more Red Criteria, or one or more Critical scores. 4 Executive Summary The following Seafood Watch report provides recommendations for Atlantic cod (Gadus morhua), haddock (Melanogrammus aeglefinus) and pollock (Pollachius virens) caught in the Northwest Atlantic by U.S fishing vessels. The three species inhabit similar habitats, have similar natural ranges, and are caught in mixed fisheries using a variety of methods including bottom trawls, sink gillnets, bottom longlines, and rod and line which will be covered by this report. The fisheries which capture cod, haddock and pollock in the Northwest Atlantic are managed by New England Fisheries Management Council (NEFMC) under the Multispecies Fishery Management Plan. Cod, haddock and pollock have a high inherent vulnerability to fishing pressure. There are two seperate stocks of cod and haddock in the US Northwest Atlantic; Georges Bank and the Gulf of Maine. Cod abundance on Georges Bank and in the Gulf of Maine is in an overfished state and of high conservation concern. Fishing pressure on both stocks by all fishing gears is too high. Haddock stocks are healthier and have fully rebuilt on Georges Bank and are above threshold biomass levels in the Gulf of Maine. Georges Bank haddock are fished at a sustainable level, whilst fishing presure in the Gulf of Maine is too high. Pollock abundance in the Northwest Atlantic is helathy and is being fished at a sustainable level. The handline fisheries in the Northwest Atlantic are relatively selective, with no species of concern caught other than the target species (typically cod). Bottom trawl fisheries in the Northwest Atlantic catch a wide variety of species, including commercially important fish and marine mammals. Of greatest concern in the bottom trawl fisheries for cod, haddock and pollock is the bycatch of yellowtail flounder which is overfished and experiencing overfishing on Georges Bank and in the Gulf of Maine. Bottom gillnet fisheries catch a variety of species, including a number of marine mammals; of greatest concern are harbor porpoise which are listed as a species of concern under the Marine Mammal Protection Act and are being negatively impacted by fishing activities in the region. Bottom longline fisheries are relvatively selective compared to the trawl and gillnet fisheries, however there is a bycatch of cod and a number of skate species that are stocks of concern. Bottom trawls have a discard rate of 48% in the region, with gillnets and longlines having a discard rate of 28% each, and handline having a discard rate of 8% (most of which is undersized cod). The NEFMC manages the groundfish fishery through a collective FMP which covers 20 stocks form 13 species. Grouping species together allows NEFMC to manage these mixed fisheries more effectively than if individual species FMPs were used. Due to the historical exploitation to 5 which the stocks have been exposed, a number of stocks are depleted or in a state of rebuilding. NEFMC has recently introduced a new management system which should improve the rate of recovery of stocks. There is a considerable effort to collect data in these fisheries through logbooks and observer coverage, which guides stock assessments (along with fishery independent data). NEFMC take into account the scientific information provided by stock assessments on the majority of occasions, however in some instances TACs have been set too high in response to social and economic need. There are a number of regulations in place which require fisheries managers to reduce the impacts of fishing activities on non‐target populations. Reporting of bycatch incentivizes reduction efforts whilst providing data for scientific research and stock assessments. The observer program provides considerable data to aid in stock assessments of target and bycatch species. Enforcement is generally good, however enforcement of regulations concerning the use of pingers in gillnet fisheries could be improved. The majority of the groundfish fishery takes place in water less than 100m deep over sand and sand‐silt habitats, and gravel habitats impacted by the fishery occur in waters less than 60m deep. Habitata impacts are a moderate conservation concern for bottom trawl fisheries, low conservation concern for bottom gillnet and bottom longline fisheries, and very low concern for handline fisheries. There is a minimal level of mitigation measures in place as a number of permanent closed areas protect essential fish habitat from bottom trawls, and other temporary and permanent closures which offer some protection from all gears (although these are not designated specifically for habitat protection and may not protect the most vulnerable of habiats). Ecosystem‐based management is currently being developed for the groundfish fishery in the Northwest Atlantic and this process is expected to take a minimum of 5 years. Management of the ecosystem in this region is a moderate conservation concern. 6 Table of Contents Final Seafood Recommendation ................................................................................................................... 2 Executive Summary ......................................................................................................................................
Recommended publications
  • Cod Fact Sheet
    R FACT SHEET Cod (Gadus morhua) Image taken from (Cohen et al. 1990) Introduction Cod (Gadus morhua) is generally considered a demersal fish although its habitat may become pelagic under certain hydrographic conditions, when feeding or spawning. It is widely distributed throughout the north Atlantic and Arctic regions in a variety of habitats from shoreline to continental shelf, in depths to 600m (Cohen et al. 1990). The Irish Sea stock spawns at two main sites in the western and eastern Irish Sea during February to April (Armstrong et al. 2011). Historically the stock has been commercially important, however in the last decade a decline in SSB and reduced productivity of the stock have led to reduce landings. Reviewed distribution map for Gadus morhua (Atlantic cod), with modelled year 2100 native range map based on IPCC A2 emissions scenario. www.aquamaps.org, version of Aug. 2013. Web. Accessed 28 Jan. 2011 Life history overview Adults are usually found in deeper, colder waters. During the day they form schools and swim about 30-80 m above the bottom, dispersing at night to feed (Cohen et al. 1990; ICES 2005). They are omnivorous; feeding at dawn or dusk on invertebrates and fish, including their own young (Cohen et al. 1990). Adults migrate between spawning, feeding and overwintering areas, mostly within the boundaries of the respective stocks. Large migrations are rare occurrences, although there is evidence for limited seasonal migrations into neighbouring regions, most Irish Sea fish will stay within their management area (ICES 2012). Historical tagging studies indicated spawning site fidelity but with varying degrees of mixing of cod between the Irish Sea, Celtic Sea and west of Scotland/north of Ireland (ICES 2015).
    [Show full text]
  • Fish and Fishery Products Hazards and Controls Guidance Fourth Edition – APRIL 2011
    SGR 129 Fish and Fishery Products Hazards and Controls Guidance Fourth Edition – APRIL 2011 DEPARTMENT OF HEALTH AND HUMAN SERVICES PUBLIC HEALTH SERVICE FOOD AND DRUG ADMINISTRATION CENTER FOR FOOD SAFETY AND APPLIED NUTRITION OFFICE OF FOOD SAFETY Fish and Fishery Products Hazards and Controls Guidance Fourth Edition – April 2011 Additional copies may be purchased from: Florida Sea Grant IFAS - Extension Bookstore University of Florida P.O. Box 110011 Gainesville, FL 32611-0011 (800) 226-1764 Or www.ifasbooks.com Or you may download a copy from: http://www.fda.gov/FoodGuidances You may submit electronic or written comments regarding this guidance at any time. Submit electronic comments to http://www.regulations. gov. Submit written comments to the Division of Dockets Management (HFA-305), Food and Drug Administration, 5630 Fishers Lane, Rm. 1061, Rockville, MD 20852. All comments should be identified with the docket number listed in the notice of availability that publishes in the Federal Register. U.S. Department of Health and Human Services Food and Drug Administration Center for Food Safety and Applied Nutrition (240) 402-2300 April 2011 Table of Contents: Fish and Fishery Products Hazards and Controls Guidance • Guidance for the Industry: Fish and Fishery Products Hazards and Controls Guidance ................................ 1 • CHAPTER 1: General Information .......................................................................................................19 • CHAPTER 2: Conducting a Hazard Analysis and Developing a HACCP Plan
    [Show full text]
  • Do Some Atlantic Bluefin Tuna Skip Spawning?
    SCRS/2006/088 Col. Vol. Sci. Pap. ICCAT, 60(4): 1141-1153 (2007) DO SOME ATLANTIC BLUEFIN TUNA SKIP SPAWNING? David H. Secor1 SUMMARY During the spawning season for Atlantic bluefin tuna, some adults occur outside known spawning centers, suggesting either unknown spawning regions, or fundamental errors in our current understanding of bluefin tuna reproductive schedules. Based upon recent scientific perspectives, skipped spawning (delayed maturation and non-annual spawning) is possibly prevalent in moderately long-lived marine species like bluefin tuna. In principle, skipped spawning represents a trade-off between current and future reproduction. By foregoing reproduction, an individual can incur survival and growth benefits that accrue in deferred reproduction. Across a range of species, skipped reproduction was positively correlated with longevity, but for non-sturgeon species, adults spawned at intervals at least once every two years. A range of types of skipped spawning (constant, younger, older, event skipping; and delays in first maturation) was modeled for the western Atlantic bluefin tuna population to test for their effects on the egg-production-per-recruit biological reference point (stipulated at 20% and 40%). With the exception of extreme delays in maturation, skipped spawning had relatively small effect in depressing fishing mortality (F) threshold values. This was particularly true in comparison to scenarios of a juvenile fishery (ages 4-7), which substantially depressed threshold F values. Indeed, recent F estimates for 1990-2002 western Atlantic bluefin tuna stock assessments were in excess of threshold F values when juvenile size classes were exploited. If western bluefin tuna are currently maturing at an older age than is currently assessed (i.e., 10 v.
    [Show full text]
  • Our Nation's Fisheries Will Be a Lot Easier Once We've Used up Everything Except Jellyfish!
    Mismanaging Our Nation’s Fisheriesa menu of what's missing Limited quantity: get ‘em while supplies last Ted Stevens Alaskan Surprise Due to years of overfishing, we probably won’t be serving up Pacific Ocean perch, Tanner crab, Greenland turbot or rougheye rockfish. They may be a little hard to swallow, but Senator Stevens and the North Pacific Council will be sure to offer last minute riders, father and son sweetheart deals, record-breaking quotas, industry-led research, conflicts of interest and anti-trust violations. Meanwhile, fur seals, sea lions and sea otters are going hungry and disappearing fast. Surprise! Pacific Rockfish: See No Fish, Eat No Fish Cowcod, Canary Rockfish and Bocaccio are just three examples of rockfish managed by the Pacific Council that are overfished. As for the exact number of West Coast groundfish that are overfished, who knows? Without surveys to tell them what’s going on, what are they managing exactly? Striped Bass: Thin Is In! This popular Atlantic rockfish is available in abundance. Unfortunately, many appear to be undernourished and suffering from lesions – a condition that may point to Omega Protein’s industrial fishery of menhaden, the striper’s favorite prey species. Actually, you may want to hold off on this one until ASMFC starts regulating menhaden. Can you believe there are still no catch limits? Red Snapper Bycatch Platter While we are unable to provide full-size red snapper, we offer this plate of twenty juvenile red snapper discarded as bycatch from a Gulf of Mexico shrimp trawler for your dining pleasure. Shrimpers take and throw away about half of all young red snappers along the Texas coast, so we’ll keep these little guys coming straight from the back of the boat to the back of your throat! Caribbean Reef Fish Grab Bag What’s for dinner from the Caribbean? Who knows? With coral reefs in their jurisdiction, you would expect the Caribbean Council to be pioneering the ecosystem-based management approach and implementing the precautionary principle approach.
    [Show full text]
  • The Decline of Atlantic Cod – a Case Study
    The Decline of Atlantic Cod – A Case Study Author contact information Wynn W. Cudmore, Ph.D., Principal Investigator Northwest Center for Sustainable Resources Chemeketa Community College P.O. Box 14007 Salem, OR 97309 E-mail: [email protected] Phone: 503-399-6514 Published 2009 DUE # 0757239 1 NCSR curriculum modules are designed as comprehensive instructions for students and supporting materials for faculty. The student instructions are designed to facilitate adaptation in a variety of settings. In addition to the instructional materials for students, the modules contain separate supporting information in the "Notes to Instructors" section, and when appropriate, PowerPoint slides. The modules also contain other sections which contain additional supporting information such as assessment strategies and suggested resources. The PowerPoint slides associated with this module are the property of the Northwest Center for Sustainable Resources (NCSR). Those containing text may be reproduced and used for any educational purpose. Slides with images may be reproduced and used without prior approval of NCSR only for educational purposes associated with this module. Prior approval must be obtained from NCSR for any other use of these images. Permission requests should be made to [email protected]. Acknowledgements We thank Bill Hastie of Northwest Aquatic and Marine Educators (NAME), and Richard O’Hara of Chemeketa Community College for their thoughtful reviews. Their comments and suggestions greatly improved the quality of this module. We thank NCSR administrative assistant, Liz Traver, for the review, graphic design and layout of this module. 2 Table of Contents NCSR Marine Fisheries Series ....................................................................................................... 4 The Decline of Atlantic Cod – A Case Study ................................................................................
    [Show full text]
  • Atlantic Cod (Gadus Morhua) Off Newfoundland and Labrador Determined from Genetic Variation
    COSEWIC Assessment and Update Status Report on the Atlantic Cod Gadus morhua Newfoundland and Labrador population Laurentian North population Maritimes population Arctic population in Canada Newfoundland and Labrador population - Endangered Laurentian North population - Threatened Maritimes population - Special Concern Arctic population - Special Concern 2003 COSEWIC COSEPAC COMMITTEE ON THE STATUS OF COMITÉ SUR LA SITUATION ENDANGERED WILDLIFE DES ESPÈCES EN PÉRIL IN CANADA AU CANADA COSEWIC status reports are working documents used in assigning the status of wildlife species suspected of being at risk. This report may be cited as follows: COSEWIC 2003. COSEWIC assessment and update status report on the Atlantic cod Gadus morhua in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. xi + 76 pp. Production note: COSEWIC would like to acknowledge Jeffrey A. Hutchings for writing the update status report on the Atlantic cod Gadus morhua, prepared under contract with Environment Canada. For additional copies contact: COSEWIC Secretariat c/o Canadian Wildlife Service Environment Canada Ottawa, ON K1A 0H3 Tel.: (819) 997-4991 / (819) 953-3215 Fax: (819) 994-3684 E-mail: COSEWIC/[email protected] http://www.cosewic.gc.ca Également disponible en français sous le titre Rapport du COSEPAC sur la situation de la morue franche (Gadus morhua) au Canada Cover illustration: Atlantic Cod — Line drawing of Atlantic cod Gadus morhua by H.L. Todd. Image reproduced with permission from the Smithsonian Institution, NMNH, Division of Fishes. Her Majesty the Queen in Right of Canada, 2003 Catalogue No.CW69-14/311-2003-IN ISBN 0-662-34309-3 Recycled paper COSEWIC Assessment Summary Assessment summary — May 2003 Common name Atlantic cod (Newfoundland and Labrador population) Scientific name Gadus morhua Status Endangered Reason for designation Cod in the inshore and offshore waters of Labrador and northeastern Newfoundland, including Grand Bank, having declined 97% since the early 1970s and more than 99% since the early 1960s, are now at historically low levels.
    [Show full text]
  • CHAPTER 3 FISH and CRUSTACEANS, MOLLUSCS and OTHER AQUATIC INVERTEBRATES I 3-L Note
    )&f1y3X CHAPTER 3 FISH AND CRUSTACEANS, MOLLUSCS AND OTHER AQUATIC INVERTEBRATES I 3-l Note 1. This chapter does not cover: (a) Marine mammals (heading 0106) or meat thereof (heading 0208 or 0210); (b) Fish (including livers and roes thereof) or crustaceans, molluscs or other aquatic invertebrates, dead and unfit or unsuitable for human consumption by reason of either their species or their condition (chapter 5); flours, meals or pellets of fish or of crustaceans, molluscs or other aquatic invertebrates, unfit for human consumption (heading 2301); or (c) Caviar or caviar substitutes prepared from fish eggs (heading 1604). 2. In this chapter the term "pellets" means products which have been agglomerated either directly by compression or by the addition of a small quantity of binder. Additional U.S. Note 1. Certain fish, crustaceans, molluscs and other aquatic invertebrates are provided for in chapter 98. )&f2y3X I 3-2 0301 Live fish: 0301.10.00 00 Ornamental fish............................... X....... Free Free Other live fish: 0301.91.00 00 Trout (Salmo trutta, Salmo gairdneri, Salmo clarki, Salmo aguabonita, Salmo gilae)................................... X....... Free Free 0301.92.00 00 Eels (Anguilla spp.)..................... kg...... Free Free 0301.93.00 00 Carp..................................... X....... Free Free 0301.99.00 00 Other.................................... X....... Free Free 0302 Fish, fresh or chilled, excluding fish fillets and other fish meat of heading 0304: Salmonidae, excluding livers and roes: 0302.11.00 Trout (Salmo trutta, Salmo gairdneri, Salmo clarki, Salmo aguabonita, Salmo gilae)................................... ........ Free 2.2¢/kg 10 Rainbow trout (Salmo gairnderi), farmed.............................. kg 90 Other............................... kg 0302.12.00 Pacific salmon (Oncorhynchus spp.), Atlantic salmon (Salmo salar) and Danube salmon (Hucho hucho).............
    [Show full text]
  • Hypotheses for the Decline of Cod in the North Atlantic*
    MARINE ECOLOGY PROGRESS SERIES Vol. 138: 293-308, 1996 Published July 25 Mar Ecol Prog Ser REVIEW Hypotheses for the decline of cod in the North Atlantic* Ransom A. ~yers'#**,Jeffrey A. ~utchings~,N. J. Barrowman' 'Northwest Atlantic Fisheries Centre, Science Branch, PO Box 5667, St. John's, Newfoundland, Canada AlC 5x1 'Department of Biology, Dalhousie University, Halifax, Nova Scotia, Canada B3H 451 ABSTRACT We examine alternative hypotheses for the decllne of 20 cod Gadus morhua stocks in the North Atlantlc The year of the lowest observed biomass of spawners did not correspond to low juve- nile survival for the cohorts that should have contnbuted to the stock in that year However, fishing mortdl~tywas very high for the years preceding the collapse The collapse of the cod stocks was not caused by a lack of resilience at low population abundance because all spawners were able to produce many potential replacements at low population size We show that as populations collapsed, flshlng mortality increased untll the populations were reduced to very low levels We conclude that increased fishing mortality caused the population decl~nes,and often the collapses, of the cod stocks KEY WORDS Gadus morhua Cod North Atlantic Decline Stocks Tlme serles Spawners Recru~tment Catch Mortality Collapse Density-dependent mortality Fishlng INTRODUCTION a fishery. We have reformulated these questions as follows: During the last few years many of the world's cod (1)What was the extent and timing of the population Gadus morhua stocks have rapidly declined to the decline? point where fishing has been effectively eliminated.
    [Show full text]
  • Portraits with Pollock
    FOREWORD The Department of the Interior's Bureau of Commercial Fisheries and th e dom es­ tic fishing industry, especiall y that part of the industry lo cated in New England, recommend pollock, an excellent sea food- nutritious, flavorful and sati s fying­ a delicious substitute for haddock. Pollock is available in great numbers in the co ld waters of the North Atlantic but is a relatively unused food resource. They are more difficult to catch th an haddock, but haddock have experienced spawning failures during the past 5 years. The famous Georges Bank haddock populations are extremely low. The United States and 13 other nations and their fishing fleets are cooperating in a program to rehabilitate the haddock resource. International annual catch quotas have been imposed and fishing for haddock in certain areas is prohibited during the spawnin g season. This program will continue at least through 1972. With little or no h addock on the market, fishing efforts are now co ncentrated on pollock, a close relative of both the haddock and cod. Try pollock us in g you r own favorite recipe, or the Bureau of Commercial Fisheries tested and approved "0;"' ;0 <h;. ,obl;"I;,o, @~ H. ~I Charles H. Meacham Commissioner for Fi sh and Wildlife The Bureau of Commercial Fishefles of the U.S. Department of the Interior proudly presents a new showing of Portraits with PollocK. In an unusual series of still lifes, the Bureau portrays this versatile fish in an exciting array of seafood spectaculars for today's busy homemaker. By using classic techniques of the masters, the Bureau has captured all the rich flavor and imagination of American pollock in this special collector's edition.
    [Show full text]
  • Pollachius Virens
    MARINE ECOLOGY PROGRESS SERIES Published October 5 Mar Ecol Prog Ser Use of rocky intertidal habitats by juvenile pollock Pollachius virens Robert W. Rangeley*, Donald L. Kramer Department of Biology, McGill University, 1205 Docteur Penfield Avenue, Montreal, Quebec, Canada H3A 1B1 ABSTRACT: We ~nvestigatedpatterns of distribution and foraging by young-of-the-year pollock Pol- lachius virens in the rocky intertidal zone. Pollock were sampled by beach seine in fucoid macroalgae and in open habitats at all stages of the tide, day and night throughout the summer. Their presence in shallow water at the high tidal stages indicated that at least part of the pollock population migrated across the full width of the intertidal zone (150 m) each tide. Densities in shallow water were much higher at low than at high tidal stages suggesting that a large influx of pollock moved in from the sub- tidal zone at low tidal stages and then dispersed into intertidal habitats at high tidal stages. There were few differences in pollock densit~esbetween algal and open habitats but abundances likely increased in the algal habitat at higher tidal stages when changes in habitat availability are taken Into account. Densities were higher at night and there was an order of magnitude decline in pollock densities from early to late summer. In another study we showed that piscivorous birds are a probable cause of pollock summer mortality. Pollock fed on invertebrates from intertidal algae relatively continuously. The tidal migrations of juvenile pollock observed in this study and their use of macroalgae as a foraging and possibly a refuging habitat strongly suggests that the rocky intertidal zone may be an important fish nursery area.
    [Show full text]
  • Pollock Or Cod: Can the Difference Be Told?
    Fishery Notes versa. The tasters were asked to identify the two like samples and then give their preference of either the like pair or the odd sample. Tasters marked their re­ sults on score sheets which were re­ Pollock or Cod: Can turned for tabulation (Fig. 1). To avoid the Difference Be Told? chance selection of the odd sample, samples were served in the order shown in Table 4, thus lowering to one-third The pollock, Pollachius virens, is a ethnic ongln. The tests were con­ the probability of chance selection of good source of protein which can often ducted, and the samples prepared, by the odd sample. be processed and prepared in recipes students of the Institute's Food Science The results ofthe 2-day test are given that call for Atlantic cod, Gadus and Nutrition Program. Fish used for in Table 5. More than 60 percent of the morhua, or haddock, Melanogrammus the taste tests were donated by a com­ tasters failed to identify the like sam­ aeglefinus. The pollock is similar in mercial fish processor in the form of ples of Fishwich and Fishcake, and flavor, odor, and texture to both cod and frozen fish fillet blocks. Recipe samples nearly half of the tasters failed to iden­ haddock, yet is not a popular catch were prepared as in Table 3 for Glouces­ tify the like samples of Gloucester Sea among coastal water fishermen who ter Sea Puffs, Fishwiches, and Puffs. About 50 percent of those tasters often equate it with poor quality and Fishcakes. who correctly identified the like pairs throw it back.
    [Show full text]
  • HELCOM Red List
    SPECIES INFORMATION SHEET Pollachius pollachius English name: Scientific name: Pollack Pollachius pollachius Taxonomical group: Species authority: Class: Actinopterygii Linnaeus, 1758 Order: Gadiformes Family: Gadidae Subspecies, Variations, Synonyms: – Generation length: 12.8 Past and current threats (Habitats Directive Future threats (Habitats Directive article 17 article 17 codes): codes): Fishing, Bycatch (F02) Fishing, Bycatch (F02) IUCN Criteria: HELCOM Red List NA – Category: Not Applicable Global / European IUCN Red List Category: Habitats Directive: NE/NE – Previous HELCOM Red List Category (2007): EN Protection and Red List status in HELCOM countries: Denmark –/–, Estonia –/–, Finland –/–, Germany –/– (Baltic Sea), Latvia –/–, Lithuania –/–, Poland –/–, Russia –/–, Sweden Protected from fishing during spawning 1st of January to 31st of March in coastal areas in Kattegat / CR Distribution and status in the Baltic Sea region During the 20th century pollack was regularly occurring in the eastern parts of Kattegat and the northern parts of the Sound (Cardinale & Svedäng 2012). Larger individuals were mainly observed in late autumn. Numbers have been significantly lower during the last decades but regular observations are still made in the Kattegat and the Sound while it is sporadically reported as far into the Baltic Sea as Gulf of Riga (HELCOM 2012). Outside the HELCOM area, it inhabits the Northeast Atlantic from the Bay of Biscay to Norway and Iceland (Froese & Pauly 2012). Reproduction has not been confirmed within the HELCOM area. Pollack. Photos by Vivica von Vietinghoff, Deutsches Meeresmuseum (top), Björn Fagerholm, Swedish University of Agricultural Sciences (bottom). © HELCOM Red List Fish and Lamprey Species Expert Group 2013 www.helcom.fi > Baltic Sea trends > Biodiversity > Red List of species SPECIES INFORMATION SHEET Pollachius pollachius Habitat and ecology The pollack is found either in mid-water or close to shore over hard bottoms.
    [Show full text]