DOCSLIB.ORG

Ity Staging of Sole, Plaice, Dab and Flounder (WKMSSPDF)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ity Staging of Sole, Plaice, Dab and Flounder (WKMSSPDF) ICES CM ICES WKMSSPDF REPORT 2010 ICES ADVISORY COMMITTEE ICES CM 2010/ACOM:50 REF. PGCCDBS Report of the Workshop on Sexual Matur- ity Staging of sole, plaice, dab and flounder (WKMSSPDF) 22-26 February 2010 Ijmuiden, Netherlands International Council for the Exploration of the Sea Conseil International pour l’Exploration de la Mer H. C. Andersens Boulevard 44–46 DK-1553 Copenhagen V Denmark Telephone (+45) 33 38 67 00 Telefax (+45) 33 93 42 15 www.ices.dk [email protected] Recommended format for purposes of citation: ICES. 2010. Report of the Workshop on Sexual Maturity Staging of sole, plaice, dab and flounder (WKMSSPDF), 22-26 February 2010, Ijmuiden, The Netherlands. ICES CM 2010/ACOM:50. 96 pp. For permission to reproduce material from this publication, please apply to the Gen- eral Secretary. The document is a report of an Expert Group under the auspices of the International Council for the Exploration of the Sea and does not necessarily represent the views of the Council. © 2010 International Council for the Exploration of the Sea ICES WKMSSPDF REPORT 2010 | i Contents Executive summary ................................................................................................................ 1 Introduction of common maturity scale ...................................................................... 1 Classification criteria for maturity stages .................................................................... 1 Comparison of stagings ................................................................................................. 1 Comparison of macroscopic staging with histology .................................................. 1 Optimal sampling time .................................................................................................. 1 Future workshops ........................................................................................................... 2 1 Opening of the meeting ................................................................................................ 3 2 Adoption of the agenda ................................................................................................ 3 3 ToR a: Overview and comparison of currently used maturity scales .................. 4 4 ToR d: Proposal of a common scale ............................................................................ 5 5 ToR c: Standardisation of classification criteria and comparison of staging .............................................................................................................................. 6 5.1 Standardisation of classification criteria ............................................................ 6 5.1.1 Sole ............................................................................................................. 6 5.1.2 Plaice .......................................................................................................... 8 5.1.3 Dab ............................................................................................................. 9 5.1.4 Flounder .................................................................................................. 10 5.2 Comparison of staging ....................................................................................... 12 5.2.1 First comparison, from pictures ........................................................... 12 5.2.2 Second comparison, fresh material ..................................................... 20 5.2.3 Third comparison, from pictures ......................................................... 30 6 ToR b: Validate macroscopic maturity determination with histological information ................................................................................................................... 39 6.1 First comparison, macroscopic pictures .......................................................... 39 6.2 Second comparison, macroscopic pictures ...................................................... 39 7 ToR e: Identify optimal sampling time to estimate maturity ogives ................. 41 7.1 Optimal sampling time ...................................................................................... 41 7.2 Understanding species biology ......................................................................... 42 8 Guidelines for future workshops on maturity staging ......................................... 42 8.1 Staging from fresh material vs. pictures .......................................................... 42 8.2 Guidelines for the pictures to be taken ............................................................ 42 8.3 Guidelines for the storage and use of pictures in a workshop ..................... 43 9 Next meeting ................................................................................................................. 43 ii | ICES WKMSSPDF REPORT 2010 10 References ..................................................................................................................... 44 Annex 1: List of participants............................................................................................... 45 Annex 2: Agenda WKMSSPDF IJmuiden (Netherlands), 22-26 February 2010 ................................................................................................................................. 48 Annex 3: WKMSSPDF terms of reference for the next meeting .................................. 50 Annex 4: Recommendations ............................................................................................... 52 Annex 5: Overview of currently used scales per country .............................................. 53 Annex 6: Length composition, sex ratio and sampling range of picture samples .......................................................................................................................... 62 Annex 7: Reference pictures for maturity stages of flatfish ......................................... 67 Annex 8: Results of staging sessions ................................................................................ 79 ICES WKMSSPDF REPORT 2010 | 1 Executive summary Introduction of common maturity scale When assigning maturity stages to fish, it is important to have an understanding of the biology of the fish and its reproductive cycle in the sampling area. This helps to distinguish the transitions between the different stages. WKMSSPDF 2010 proposed to adopt the 6 point scale as proposed by the gadoid workshop WKMSCWHS 2007 (ICES, 2008). From wide ranging discussions it has be- come evident that outside the spawning period it is not reliably possible to distin- guish between what is described as a resting stage 5 and a re-maturing stage 2 (histological pictures have given credence to this). To this end it is recommended for flatfish, stage 5 should only be used during the proposed sampling period (see ‘Op- timal sampling time’) and only to describe a skipped spawning fish. It is recommended that institutes carry out in-house workshops on the reproductive biology of the fish and maturity staging, also as a follow-up of WKMSSPDF2010 to introduce the new common scale. An important aspect of the introduction of the new common scale is to take care that all institutes will be able to transpose their own scale into the common scale. This will give the flexibility for the institutes sometimes to keep their own scale but to internationalise their data in an easy way. Classification criteria for maturity stages For all species, classification criteria were defined in subgroups and presented in a similar way. Plaice and dab were discussed in the same subgroup since only a few experts on dab were present at the workshop. As far as possible, the subgroups worked on a reference picture collection per species per sex. Comparison of stagings The stagings were done by 19 readers, in three rounds (picture-fresh-picture). The first staging (from pictures) had low agreement (<60%) for all species. The fresh stag- ing had a clearly higher agreement (>75%) for all species. In the third staging (from pictures) progress was made in percentage agreement compared to the first staging, but there was still a lower agreement on the stages then the staging from fresh mate- rial. This is not surprising since touching is one of the ways to identify maturity stages in fish. Comparison of macroscopic staging with histology The comparison between the macroscopic staging and histological slides shows that there is an early development stage in gonads seen in the histological samples which cannot easily be indentified macroscopically. The general percentage of agreement between histological slides and macroscopic scales is very low. This might be caused by the number of samples outside the recommended sampling period. Optimal sampling time As it is difficult to identify the proper maturity stage when fish is not clearly develop- ing, data collection for maturity ogives is recommended during the pre-spawning season. This implies that sampling for maturity staging for sole, plaice, dab and flounder should be done during late fourth quarter until the end of the first quarter. 2 | ICES WKMSSPDF REPORT 2010 For assessment purposes, only data from one month before the spawning season (to be identified based on the collected data) until the start of the spawning season should be used for the estimation of maturity ogives for sole, plaice, dab and floun- der. Any macroscopic staging outside of this period can be misinterpreted and should not be used for maturity ogives. However, collecting maturity
Load more

Recommended publications
  • Current Situation, Trends and Prospects in World Capture Fisheries‘
    JUNE 1995 CURRENT SITUATION, TRENDS AND PROSPECTS IN WORLD CAPTURE FISHERIES‘ S.M. Garcia and C. Newton FAO Fisheries- Department, Rome, Italy Abstract Following an earlier analysis provided by FAO (19931, the paper gives an update of the trends and future perspectives of world fisheries. It describes and comments on worldwide trends in landings, trade, prices and fleet size. It illustrates the decrease in landings in the last 3 years, the relationship between landings and prices and the large overcapacity in world fishing fleets. It provides a review of the state of world fishery resources, globally, by region and species groups, as well as a brief account of environmental impacts on fisheries. It presents an economic perspective for world fisheries which underlines further the overcapacity and subsidy issues that characterize modern fisheries. In conclusion, it discusses‘management issues including the need for fleet reduction policies, the potential combined effect of international trade on resources depletion in developing exporting countries, throwing into question the overall sustainability of the world fishery system. LIST OF FIGURES Fig. 1: Evolution of fishery production since 1800 (modified from Hilborn, 1992). Fig. 2: Total reported catches from marine fisheries(?950-1 992). Fig. 3: World catch of demersal species (1970-1 992) Fig. 4: World catch of pelagic species (1970-1 992) P’ Fig. 5: Production of flatfish, tuna and shrimp (including culture) (1970-92) 3 Fig. 6: Value of major species and group of species and cumulative ‘Paper presented at the Conference on Fisheries Management. Global trends. Seattle (Washington, USA), 14-16 June 1994 2 percentage of world total in 1970 (A) and 1992 (BI.
    [Show full text]
  • Identification of Larvae of Three Arctic Species of Limanda (Family Pleuronectidae)
    Identification of larvae of three arctic species of Limanda (Family Pleuronectidae) Morgan S. Busby, Deborah M. Blood & Ann C. Matarese Polar Biology ISSN 0722-4060 Polar Biol DOI 10.1007/s00300-017-2153-9 1 23 Your article is protected by copyright and all rights are held exclusively by 2017. This e- offprint is for personal use only and shall not be self-archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com”. 1 23 Author's personal copy Polar Biol DOI 10.1007/s00300-017-2153-9 ORIGINAL PAPER Identification of larvae of three arctic species of Limanda (Family Pleuronectidae) 1 1 1 Morgan S. Busby • Deborah M. Blood • Ann C. Matarese Received: 28 September 2016 / Revised: 26 June 2017 / Accepted: 27 June 2017 Ó Springer-Verlag GmbH Germany 2017 Abstract Identification of fish larvae in Arctic marine for L. proboscidea in comparison to the other two species waters is problematic as descriptions of early-life-history provide additional evidence suggesting the genus Limanda stages exist for few species. Our goal in this study is to may be paraphyletic, as has been proposed in other studies.
    [Show full text]
  • American Eel Anguilla Rostrata
    COSEWIC Assessment and Status Report on the American Eel Anguilla rostrata in Canada SPECIAL CONCERN 2006 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 2006. COSEWIC assessment and status report on the American eel Anguilla rostrata in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. x + 71 pp. (www.sararegistry.gc.ca/status/status_e.cfm). Production note: COSEWIC would like to acknowledge V. Tremblay, D.K. Cairns, F. Caron, J.M. Casselman, and N.E. Mandrak for writing the status report on the American eel Anguilla rostrata in Canada, overseen and edited by Robert Campbell, Co-chair (Freshwater Fishes) COSEWIC Freshwater Fishes Species Specialist Subcommittee. Funding for this report was provided by 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 Évaluation et Rapport de situation du COSEPAC sur l’anguille d'Amérique (Anguilla rostrata) au Canada. Cover illustration: American eel — (Lesueur 1817). From Scott and Crossman (1973) by permission. ©Her Majesty the Queen in Right of Canada 2004 Catalogue No. CW69-14/458-2006E-PDF ISBN 0-662-43225-8 Recycled paper COSEWIC Assessment Summary Assessment Summary – April 2006 Common name American eel Scientific name Anguilla rostrata Status Special Concern Reason for designation Indicators of the status of the total Canadian component of this species are not available.
    [Show full text]
  • Inventory of Parasitic Copepods and Their Hosts in the Western Wadden Sea in 1968 and 2010
    INVENTORY OF PARASITIC COPEPODS AND THEIR HOSTS IN THE WESTERN WADDEN SEA IN 1968 AND 2010 Wouter Koch NNIOZIOZ KKoninklijkoninklijk NNederlandsederlands IInstituutnstituut vvooroor ZZeeonderzoekeeonderzoek INVENTORY OF PARASITIC COPEPODS AND THEIR HOSTS IN THE WESTERN WADDEN SEA IN 1968 AND 2010 Wouter Koch Texel, April 2012 NIOZ Koninklijk Nederlands Instituut voor Zeeonderzoek Cover illustration The parasitic copepod Lernaeenicus sprattae (Sowerby, 1806) on its fish host, the sprat (Sprattus sprattus) Copyright by Hans Hillewaert, licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license; CC-BY-SA-3.0; Wikipedia Contents 1. Summary 6 2. Introduction 7 3. Methods 7 4. Results 8 5. Discussion 9 6. Acknowledgements 10 7. References 10 8. Appendices 12 1. Summary Ectoparasites, attaching mainly to the fins or gills, are a particularly conspicuous part of the parasite fauna of marine fishes. In particular the dominant copepods, have received much interest due to their effects on host populations. However, still little is known on the copepod fauna on fishes for many localities and their temporal stability as long-term observations are largely absent. The aim of this project was two-fold: 1) to deliver a current inventory of ectoparasitic copepods in fishes in the southern Wadden Sea around Texel and 2) to compare the current parasitic copepod fauna with the one from 1968 in the same area, using data published in an internal NIOZ report and additional unpublished original notes. In total, 47 parasite species have been recorded on 52 fish species in the southern Wadden Sea to date. The two copepod species, where quantitative comparisons between 1968 and 2010 were possible for their host, the European flounder (Platichthys flesus), showed different trends: Whereas Acanthochondria cornuta seems not to have altered its infection rate or per host abundance between years, Lepeophtheirus pectoralis has shifted towards infection of smaller hosts, as well as to a stronger increase of per-host abundance with increasing host length.
    [Show full text]
  • Pictorial Guide to the Gill Arches of Gadids and Pleuronectids in The
    Alaska Fisheries Science Center National Marine Fisheries Service U.S. DEPARTMENT OF COMMERCE AFSC PROCESSED REPORT 91.15 Pictorial Guide to the G¡ll Arches of Gadids and Pleuronectids in the Eastern Bering Sea May 1991 This report does not const¡Ute a publicalion and is for lnformation only. All data herein are to be considered provisional. ERRATA NOTICE This document is being made available in .PDF format for the convenience of users; however, the accuracy and correctness of the document can only be certified as was presented in the original hard copy format. Inaccuracies in the OCR scanning process may influence text searches of the .PDF file. Light or faded ink in the original document may also affect the quality of the scanned document. Pictorial Guide to the ciII Arches of Gadids and Pleuronectids in the Eastern Beri-ng Sea Mei-Sun Yang Alaska Fisheries Science Center National Marine Fisheries Se:nrice, NoAÀ 7600 Sand Point Way NE, BIN C15700 Seattle, lÍA 98115-0070 May 1991 11I ABSTRÀCT The strrrctures of the gill arches of three gadids and ten pleuronectids were studied. The purPose of this study is, by using the picture of the gill arches and the pattern of the gi[- rakers, to help the identification of the gadids and pleuronectids found Ín the stomachs of marine fishes in the eastern Bering Sea. INTRODUCTION One purjose of the Fish Food Habits Prograrn of the Resource Ecology and FisherY Managenent Division (REF![) is to estimate predation removals of cornmercially inportant prey species by predatory fish (Livingston et al. 1986).
    [Show full text]
  • Identification of the Sole Resources of the Gambia
    Identification of the Sole Resources of The Gambia Gambia-Senegal Sustainable Fisheries Program (Ba Nafaa) December 2011 This publication is available electronically on the Coastal Resources Center’s website at http://www.crc.uri.edu. For more information contact: Coastal Resources Center, University of Rhode Island, Narragansett Bay Campus, South Ferry Road, Narragansett, Rhode Island 02882, USA. Tel: 401) 874-6224; Fax: 401) 789-4670; Email: [email protected] The BaNafaa project is implemented by the Coastal Resources Center of the University of Rhode Island and the World Wide Fund for Nature-West Africa Marine Ecoregion (WWF-WAMER) in partnership with the Department of Fisheries and the Ministry of Fisheries, Water Resources and National Assembly Matters. Citation: Coastal Resources Center, 2011. Identification of the Sole Resources of The Gambia. Coastal Resources Center, University of Rhode Island, pp.11 Disclaimer: This report was made possible by the generous support of the American people through the United States Agency for International Development (USAID). The contents are the responsibility of the authors and do not necessarily reflect the views of USAID or the United States Government. Cooperative Agreement # 624-A-00-09- 00033-00. Cover Photo: Coastal Resources Center/URI Fisheries Center Photo Credit: Coastal Resources Center/URI Fisheries Center 2 The Sole Resources Proper identification of the species is critical for resource management. There are four major families of flatfish with representative species found in the Gambian nearshore waters: Soleidae, Cynoglossidae, Psettododae and Paralichthyidae. The species below have been confirmed through literature review, and through discussions with local fishermen, processors and the Gambian Department of Fisheries.
    [Show full text]
  • Pacific Ocean Perch Rebuilt (December 2017)
    Pacific Fishery Management Council NEWS RELEASE FOR IMMEDIATE RELEASE: December 11, 2017 Contact: Ms. Jennifer Gilden, Communications Officer, [email protected], 503‐820‐2418 Mr. John DeVore, Groundfish Staff Officer, [email protected], 503‐820‐2413 Mr. Chuck Tracy, Executive Director, 503‐820‐2280 Mr. Jim Milbury, National Marine Fisheries Service, 310‐245‐7114 Michael Milstein, National Marine Fisheries Service, 503‐231‐6268 ANOTHER IMPORTANT WEST COAST GROUNDFISH STOCK IS REBUILT PORTLAND, OREGON – An important West Coast groundfish stock that was formerly overfished has now been rebuilt. Pacific ocean perch, which is managed by the Pacific Fishery Management Council and the National Marine Fisheries Service (NMFS or NOAA Fisheries), has constrained the West Coast trawl fishery for decades. Pacific ocean perch has been overfished since the mid‐1960s when foreign fleets targeted groundfish stocks, in particular Pacific ocean perch, off the U.S. West Coast. The mandates of the 1976 Magnuson‐Stevens Act, the primary law governing U.S. fisheries management, eventually ended foreign fishing within 200 miles of the U.S. coast. The first Federal trip limits to discourage targeting and to conserve a U.S. West Coast groundfish stock were implemented for Pacific ocean perch in 1979 by the Pacific Fishery Management Council and NMFS. Rebuilding plans for Pacific ocean perch were adopted in 2000 and 2003.. 1 Managing groundfish fisheries under rebuilding plans has been an immense challenge for the Pacific Council and the NMFS. These plans required sharp reductions in commercial and recreational fisheries targeting groundfish, and included widespread fishing closures through the establishment of Rockfish Conservation Areas off the West Coast and other measures.
    [Show full text]
  • American Eel Biological Species Report
    AMERICAN EEL BIOLOGICAL SPECIES REPORT Supplement to: Endangered and Threatened Wildlife and Plants; 12-Month Petition Finding for the American Eel (Anguilla rostrata) Docket Number FWS-HQ-ES-2015-0143 U.S. Fish and Wildlife Service, Region 5 June 2015 This page blank for two-sided printing ii U.S. Fish and Wildlife Service, Northeast Region AMERICAN EEL BIOLOGICAL SPECIES REPORT Steven L. Shepard U.S. Fish and Wildlife Service, Maine Field Office 17 Godfrey Drive, Suite 2 Orono, Maine 04473-3702 [email protected] For copies of this report, contact: U.S. Fish and Wildlife Service Hadley, MA 01035 http://www.fws.gov/northeast/newsroom/eels.html http://www.regulations.gov This American Eel Biological Species Report has been prepared by the U.S. Fish and Wildlife Service (Service) in support of a Status Review pursuant to the Endangered Species Act, 16 U.S.C. §§ 1531, et seq. This report reviews the best available information, including published literature, reports, unpublished data, and expert opinions. The report addresses current American eel issues in contemporary time frames. The report is not intended to provide definitive statements on the subjects addressed, but rather as a review of the best available information and ongoing investigations. The report includes updates to, and relevant material from, the Service’s 2007 American Eel Status Review. The report was published in January 2015 following peer review. The report was revised to correct typographical and minor factual errors and reissued in June 2015. With thanks to Krishna Gifford, Martin Miller, James McCleave, Alex Haro, Tom Kwak, David Richardson, Andy Dolloff, Kate Taylor, Wilson Laney, Sheila Eyler, Mark Cantrell, Rosemarie Gnam, Caitlin Snyder, AJ Vale, Steve Minkkinen, Matt Schwarz, Sarah LaPorte, Angela Erves, Heather Bell, the ASMFC American Eel Technical Committee, and the USFWS American Eel Working Group.
    [Show full text]
  • Kosher Fish List
    Kosher Fish List Cichlids Including: Tilapias Mozambique mouthbrooder Tilapia mossambica; Cichlios; Rio Grande perch This is a consolidated list of the more common Cigarfish See: Jacks varieties, additional types with their latin species Cisco See Trouts name at the JSOR office and at www.jsor.org Coalfish See: Codfish Cobia, cabio, or black bonito Cod, cultus, black, blue, Albacore See: Mackerels or ling. See: Greenlings, Sablefish Amberjack See: Jacks Codfish, Including: Cod, Haddock, Pacific cod; Pollock, Anchovies Including: European anchovy, North of saithe, or coalfish; Walleye Pollock, Hakes; Whiting; California anchovy Blue whiting or poutassou Tomcods or frostfish Angelfish and butterfly fish Coho salmon See: Trouts Barracudas Corbina or Corvina, See: Drums Bass See Sea Basses. Temperate basses, Sunfish, Drums Crapplie See: Sunfish Blackfish See: Carps, Wrasses Blacksmith See: Damselfish Crucian carp See: Carps Blueback See: Flounders, Herrings, Trouts Dolphin fish or mahimahis Not to be confused with the Bluefish or snapper blue Mammal called Dolphin or Porpoise, which is non kosher. Bluegill See: Sunfish Drums and croakers, Including: Seatrouts and Bocaccio See: Scorpionfish carvinas; Weakfish, White seabass, Croakers, Silver Bonefish perch, White or King croaker; Black croaker Spotfin Bonito See: Cobia, Mackerels croaker); Yellowfin croaker, Drums; Red drum or channel bass Freshwater drum, Kingfish or king Bowfin Bowfish, Freshwater dogfish, or grindle whitings California corbina, spot or lafayette; Queenfish Bream See: Carps, Atlantic Pomfret, P Cubbyu or ribbon fish Brill See: Flounder Flounders Including: Summer flounder or fluke, Yellowtail flounder, Winter flounder, lemon sole, Buffalo Fishes See: Suckers Halibuts; "Dover" sole, "English" sole, Yellowfin sole Burbot See: Codfish Pacific turbots, Curlfin turbot or Diamond turbot, ButterFish Pacific pompano, harvestfish Greenland turbot or halibut Brill (scophthalmus rhomus).
    [Show full text]
  • Guide to the Parasites of Fishes of Canada Part II - Crustacea
    Canadian Special Publication of Fisheries and Aquatic Sciences 101 DFO - Library MPO - Bibliothèque III 11 1 1111 1 1111111 II 1 2038995 Guide to the Parasites of Fishes of Canada Part II - Crustacea Edited by L. Margolis and Z. Kabata L. C.3 il) Fisheries Pêches and Oceans et Océans Caned. Lee: GUIDE TO THE PARASITES OF FISHES OF CANADA PART II - CRUSTACEA Published by Publié par Fisheries Pêches 1+1 and Oceans et Océans Communications Direction générale Directorate des communications Ottawa K1 A 0E6 © Minister of Supply and Services Canada 1988 Available from authorized bookstore agents, other bookstores or you may send your prepaid order to the Canadian Government Publishing Centre Supply and Services Canada, Ottawa, Ont. K1A 0S9. Make cheques or money orders payable in Canadian funds to the Receiver General for Canada. A deposit copy of this publication is also available for reference in public libraries across Canada. Canada : $11.95 Cat. No. Fs 41-31/101E Other countries: $14.35 ISBN 0-660-12794-6 + shipping & handling ISSN 0706-6481 DFO/4029 Price subject to change without notice All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the Publishing Services, Canadian Government Publishing Centre, Ottawa, Canada K1A 0S9. A/Director: John Camp Editorial and Publishing Services: Gerald J. Neville Printer: The Runge Press Limited Cover Design : Diane Dufour Correct citations for this publication: KABATA, Z. 1988. Copepoda and Branchiura, p. 3-127.
    [Show full text]
  • Mercury in Fish Wallet Card -- a Guide to Protecting Your Family's
    A Guide to Protecting Mercury Your Family’s Health in Fish Natural Resources Defense Council www.nrdc.org Eating fi sh is good for you, right? It can be. But some fi sh is high in mercury, a chemical that can cause serious health problems, especially for children and pregnant women. If you are pregnant or planning to become pregnant, use this guide to see what amount of fi sh sold in grocery stores and restaurants is safe to eat. Keep this card with you. Refer to it when you go to restaurants or the grocery store to help you make healthy choices for you — and for the ocean. EATING CANNED TUNA SAFELY If you weigh: Don’t eat more than 1 can every: White Albacore Chunk Light 20 lbs 10 weeks 3 weeks 30 lbs 6 weeks 2 weeks 40 lbs 5 weeks 11 days 50 lbs 4 weeks 9 days 60 lbs 3 weeks 7 days 70 lbs 3 weeks 6 days 80 lbs 2 weeks 6 days 90 lbs 2 weeks 5 days 100 lbs 2 weeks 5 days 110 lbs 12 days 4 days 120 lbs 11 days 4 days 130 lbs 10 days 4 days 140 lbs 10 days 3 days 150+ lbs 9 days 3 days © Natural Resources Defense Council May 2006 Visit www.NRDC.org/mercury for more information about mercury and fi sh. ■ Learn about mercury and its effects Test your mercury levels ■ Know how mercury gets into your home and food on our online calculator ■ Sign up to take action to protect yourself and your family LEAST MERCURY Anchovies Herring Sardine Butterfi sh Mackerel (N.
    [Show full text]
  • ICES Fishmap Species Factsheet-Plaice
    Plaice Pleuronectes platessa Max size: 100 cm Family Pleuronectidae Max age: 50 years Introduction Taxonomy: Plaice Pleuronectes platessa Linnaeus, 1758 (Order Pleuronectiformes; Family Pleuronectidae), is the sole member of its genus, and one of seven species within the family occurring in the North Sea and Skagerrak. Pleuronectids are flatfishes characterised by the eyes being (in general) on the right side of the body (in contrast to Scopthalmidae) and by having a well-developed lateral line on both sides of the body (in contrast to Soleidae). omm. common names Danish Rødspætte Icelandic Skarkoli Dutch Schol Latvian J ras zeltplekste English Plaice Norwegian Rødspette Estonian Merilest Polish Gladzica Faeroese Reyðsprøka Portuguese Solha Finnish Punakampela Russian French Plie Spanish Solla German Scholle Swedish Rödspätta General: Plaice is an important species in European waters that has been exploited for centuries. It is also one of the best studied species in the North Sea. Plaice spawn offshore in restricted areas from where the eggs and larvae are transported effectively to the coastal nurseries. Tagging experiments have shown a strong fidelity behaviour, individual fish returning to the same spawning and feeding areas, where they had been before [1,2]. Minimum Landing Size: 27 cm. Distribution Biogeographical distribution: Plaice may be found from the western Mediterranean Sea, along the coast of Europe as far north as the White Sea and Iceland. Occasionally they occur off Greenland [3]. Juveniles are found in shallow coastal waters and outer estuaries. As they grow older they gradually move into deeper water ( Heinckes Law ). Pleuronectes Plaice platessa Family Pleuronectidae Spatial distribution in the North Sea: During summer, juvenile plaice are concentrated in the Southern and German Bights (Fig.
    [Show full text]