DOCSLIB.ORG

Clyde Ecosystem Review

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Clyde Ecosystem Review SCOTTISH MARINE AND FRESHWATER SCIENCE VOLUME 3 NUMBER 3 Clyde Ecosystem Review F McIntyre, P G Fernandes and W R Turrell Scottish Marine and Freshwater Science Report Volume 3 Number 3 Clyde Ecosystem Review McIntyre, F., Fernandes, P.G. and W. R. Turrell The Scottish Government, Edinburgh 2012 Marine Scotland is the directorate of the Scottish Government responsible for the integrated management of Scotland’s seas. Marine Scotland Science (formerly Fisheries Research Services) provides expert scientific and technical advice on marine and fisheries issues.Scottish Marine and Freshwater Science is a series of reports that publish results of research and monitoring carried out by Marine Scotland Science. These reports are not subject to formal external peer-review. © Crown copyright 2012 You may re-use this information (excluding logos and images) free of charge in any format or medium, under the terms of the Open Government Licence. To view this licence, visit http://www.nationalarchives.gov.uk/doc/open-government-licence/ or e-mail: [email protected]. Where we have identified any third party copyright information you will need to obtain permission from the copyright holders concerned. This document is available from our website at www.scotland.gov.uk. ISBN: 978-1-78045-877-9 (web only) ISSN: 2043-7722 The Scottish Government St Andrew’s House Edinburgh EH1 3DG Produced for the Scottish Government by APS Group Scotland DPPAS13075 (06/12) Published by the Scottish Government, June 2012 CLYDE ECOSYSTEM REVIEW McIntyre, F., Fernandes, P.G. and W. R. Turrell Contents 1. EXECUTIVE0B SUMMARY ............................................................................................... 4 1.1 Introduction ............................................................................................................. 4 1.2 Literature Review - Environment ............................................................................. 5 1.3 Literature Review - Biodiversity ............................................................................... 6 1.4 Literature Review – Non-Fishing Human Impacts ................................................... 8 1.5 Literature Review - Fishing (Pelagic and Shelfish) ................................................. 9 1.6 Heath and Speirs (2011) ....................................................................................... 13 1.7 A Management Data Tool ..................................................................................... 17 1.8 Suggestions for Future Work................................................................................. 19 1.8.1 Clyde Hydrodynamic Model ........................................................................... 19 1.8.2 Clyde Ecosystem Model ................................................................................ 20 1.8.3 Clyde Inshore Benthic Survey ........................................................................ 20 1.8.4 Clyde – an MSFD Development Area? .......................................................... 20 1.8.5 Clyde Pelagic Fish Stock Acoustic Survey ..................................................... 20 1.8.6 Clyde Demersal Fish Survey .......................................................................... 20 1.8.7 Improving the Clyde Management Evaluation Model ..................................... 21 2. INTRODUCTION1B ......................................................................................................... 22 2.1.1 An Ecological Desert - Thurston and Roberts (2010) ..................................... 22 2.1.2 A Changed Ecosystem - Heath and Speirs (2011) ......................................... 22 2.1.3 This Report .................................................................................................... 23 3. THE2B ENVIRONMENT OF THE CLYDE SEA ................................................................ 25 3.1 Definition11B of the Clyde Sea .................................................................................... 25 3.2 Geological History of the Clyde ............................................................................. 25 3.3 Bathymetry and Sedimentology ............................................................................ 26 3.4 Hydrography13B ......................................................................................................... 28 3.4.1 An42B Annual Cycle in the Clyde ......................................................................... 29 3.4.2 Warming43B Sea Temperatures .......................................................................... 32 3.5 Plankton14B ................................................................................................................ 32 3.5.1 Phytoplankton44B ................................................................................................ 33 3.5.2 Zooplankton45B ................................................................................................... 35 3.6 Concluding Remarks ............................................................................................. 35 3.7 Suggestions for Further Work ............................................................................... 35 4. BIODIVERSITY3B ............................................................................................................ 37 4.1 Background15B ........................................................................................................... 37 4.2 Benthic Fauna ....................................................................................................... 38 4.3 Maerl17B beds ............................................................................................................ 39 4.4 Seabirds18B ............................................................................................................... 40 4.5 Megafauna19B ............................................................................................................ 41 4.6 Threats20B to Biodiversity........................................................................................... 42 4.6.1 Invasive46B species ............................................................................................ 42 4.6.2 Climate47B change .............................................................................................. 42 4.7 Protection21B of Biodiversity ....................................................................................... 42 4.8 Suggestion for Further Work ................................................................................. 43 5. HUMAN4B IMPACTS (OTHER THAN FISHING) ............................................................. 46 5.1 Background22B ........................................................................................................... 46 5.2 Assessment23B of Pollution ........................................................................................ 47 5.3 Marine24B Litter .......................................................................................................... 52 5.4 Shipping25B ................................................................................................................ 52 1 5.5 26B Aquaculture .......................................................................................................... 53 5.6 Scotland’s Marine Atlas – Overall Assessment ..................................................... 54 5.6.1 Activities and Pressures ................................................................................. 54 5.6.2 Clean and Safe .............................................................................................. 55 5.6.3 Healthy and Biologically Diverse .................................................................... 55 5.6.4 Response / Forward Look .............................................................................. 55 5.7 Concluding Remark .............................................................................................. 56 6. HUMAN5B IMPACTS - FISHERIES ................................................................................. 57 6.1 Introduction27B ........................................................................................................... 57 6.2 Legislation28B ............................................................................................................. 57 6.3 Stock29B Assessment ................................................................................................ 59 6.4 Pelagic30B Fisheries................................................................................................... 59 6.4.1 Herring48B ........................................................................................................... 59 6.5 Demersal31B Fisheries ............................................................................................... 61 6.5.1 Cod49B ................................................................................................................ 63 6.5.2 Hake50B .............................................................................................................. 64 6.5.3 Saithe51B ............................................................................................................ 65 6.6 Shellfish32B fisheries .................................................................................................. 65 6.6.1 Nephrops52B ......................................................................................................
Load more

Recommended publications
  • Trigloporus Lastoviza, Bonnaterre, 1788
    International Journal of Fisheries and Aquatic Studies 2015; 3(1): 75-80 ISSN: 2347-5129 (ICV-Poland) Impact Value: 5.62 Age, growth and mortality of Streaked Gurnard (GIF) Impact Factor: 0.352 IJFAS 2015; 3(1): 75-80 © 2015 IJFAS (Trigloporus lastoviza, Bonnaterre, 1788) in the Egyptian www.fisheriesjournal.com Mediterranean waters off Alexandria Received: 11-06-2015 Accepted: 13-07-2015 Sabry S El-Serafy, Fahmy I El-Gammal, Sahar F Mehanna, Nasr-Allah H Sabry S El-Serafy Zoology Department, Faculty of Abdel- Hameid, Elsayed FE Farrag Science, Benha University. Abstract Fahmy I El-Gammal Age, growth and mortality of Streaked Gurnard Trigloporus lastoviza from the Egyptian Mediterranean Fisheries Department, National waters off Alexandria were investigated between the period from July 2009 and August 2010. The Institute of Oceanography and observed maximum age was 4 years for both sexes based on otolith readings. The length-weight Fisheries. relationship was estimated as W=0.0088L3.0694 (r=0.9854); W=0.0085L3.0836 (r=0.9803) and W=0.0106L3.0058 (r=0.9853) for males, females and combined sexes respectively. The von Bertalanffy Sahar F Mehanna Fisheries Department, National growth equations for length were: Lt=27.17 (1-e-0.3466 (t+1.01), Lt = 27.0 (1 - e -0.3703 (t + 0.93) and Institute of Oceanography and Lt = 26.92 (1 - e -0.3699 (t + 0.92) for males, females and combined sexes respectively. The growth Fisheries. performance index value (Φ) was calculated as 2.41, 2.43 and 2.43 for males, females and combined sexes respectively.
    [Show full text]
  • An Investigation on Fishes of Bandirma Bay (Sea of Marmara)
    BAÜ Fen Bil. Enst. Dergisi (2004).6.2 AN INVESTIGATION ON FISHES OF BANDIRMA BAY (SEA OF MARMARA) Hatice TORCU KOÇ University of Balikesir, Faculty of Science and Arts, Department of Hydrobiology, 10100, Balikesir, Turkey ABSTRACT This investigation was carried out for the determination of fish species living in Bandırma Bay (Sea of Marmara). Morphometric and meristic characters of of fishes caught by trawl and various nets in Bandırma Bay in the years of 1998-1999 were examined and some morphological, ecological properties, and local names of 34 determined species are given. Key Words: Fish Species, Systematic, Bandırma Bay BANDIRMA KÖRFEZİ (MARMARA DENİZİ) BALIKLARI ÜZERİNE BİR ARAŞTIRMA ÖZET Bu araştırma Bandırma Körfezi (Marmara Denizi)’nde yaşayan balık türlerini belirlemek amacıyla yapılmıştır. 1998-1999 yılları arasında körfez içinde trol ve çeşitli ağlar ile yakalanan balıkların morfometrik ve meristik karakterleri incelenmiş ve saptanan 34 türün bazı morfolojik, ekolojik özellikleri, ve yerel isimleri verilmiştir. Anahtar Kelimeler: Balık türleri, Sistematik, Bandırma Körfezi 1. INTRODUCTION Research on the sea fauna along the coasts of Turkey was initiated by foreign researchers at the begining of the 20th century and entered an intensive stage with Turkish researchers in the 1940s. However, the fish fauna of Turkish seas has still not been fully determined. Of these researchers, Tortonese (1) listed 300 species. Papaconstantinou and Tsimenids (2) listed 33 species. Papaconstantinou (3) listed the most of 447 species for Aegean Sea. Slastenenko (4) listed 200 species for Sea of Marmara and 189 species for Black Sea. Tortonese (1) reported 540 fish species in whole of Mediterranean. Demetropoulos and Neocleous (5) gave a list of fishes for Cyprus area.
    [Show full text]
  • Updated Checklist of Marine Fishes (Chordata: Craniata) from Portugal and the Proposed Extension of the Portuguese Continental Shelf
    European Journal of Taxonomy 73: 1-73 ISSN 2118-9773 http://dx.doi.org/10.5852/ejt.2014.73 www.europeanjournaloftaxonomy.eu 2014 · Carneiro M. et al. This work is licensed under a Creative Commons Attribution 3.0 License. Monograph urn:lsid:zoobank.org:pub:9A5F217D-8E7B-448A-9CAB-2CCC9CC6F857 Updated checklist of marine fishes (Chordata: Craniata) from Portugal and the proposed extension of the Portuguese continental shelf Miguel CARNEIRO1,5, Rogélia MARTINS2,6, Monica LANDI*,3,7 & Filipe O. COSTA4,8 1,2 DIV-RP (Modelling and Management Fishery Resources Division), Instituto Português do Mar e da Atmosfera, Av. Brasilia 1449-006 Lisboa, Portugal. E-mail: [email protected], [email protected] 3,4 CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. E-mail: [email protected], [email protected] * corresponding author: [email protected] 5 urn:lsid:zoobank.org:author:90A98A50-327E-4648-9DCE-75709C7A2472 6 urn:lsid:zoobank.org:author:1EB6DE00-9E91-407C-B7C4-34F31F29FD88 7 urn:lsid:zoobank.org:author:6D3AC760-77F2-4CFA-B5C7-665CB07F4CEB 8 urn:lsid:zoobank.org:author:48E53CF3-71C8-403C-BECD-10B20B3C15B4 Abstract. The study of the Portuguese marine ichthyofauna has a long historical tradition, rooted back in the 18th Century. Here we present an annotated checklist of the marine fishes from Portuguese waters, including the area encompassed by the proposed extension of the Portuguese continental shelf and the Economic Exclusive Zone (EEZ). The list is based on historical literature records and taxon occurrence data obtained from natural history collections, together with new revisions and occurrences.
    [Show full text]
  • Gonadal Structure and Gametogenesis of Trigla Lyra
    Zoological Studies 41(4): 412-420 (2002) Gonadal Structure and Gametogenesis of Trigla lyra (Pisces: Triglidae) Marta Muñoz*, Maria Sàbat, Sandra Mallol and Margarida Casadevall Biologia Animal, Departament Ciències Ambientals, Universitat de Girona, Campus de Montilivi, Girona 17071, Spain. (Accepted July 19, 2002) Marta Muñoz, Maria Sàbat, Sandra Mallol and Margarida Casadevall (2002) Gonadal structure and gameto- genesis of Trigla lyra (Pisces: Triglidae). Zoological Studies 41(4): 412-420. The gonadal structure and devel- opment stages of germ cells of Trigla lyra are described for both sexes. The ovigerous lamellae of the saccular cystovarian ovaries spread from the periphery to the center of the gonad where the lumen is located. In addi- tion to the postovulatory follicles and atretic oocytes, seven stages of development are described based on the histological and ultrastructural characteristics of the oocytes. Gonadal development is of the “synchronous group” type. This kind of development and the presence of postovulatory follicles in ovaries which still contain developing vitellogenic oocytes suggest that T. lyra spawns on multiple occasions over a relatively prolonged period of time. Drops of oil in the mature oocyte indicate that spawning is pelagic. The testes are lobular and of the “unrestricted spermatogonial” type. Male germ cells are divided into 8 stages that were principally ana- lyzed by means of transmission electron microscopy. The morphological characteristics of the spermatozoon, as a short head and a barely differentiated
    [Show full text]
  • Marine Fishes from Galicia (NW Spain): an Updated Checklist
    1 2 Marine fishes from Galicia (NW Spain): an updated checklist 3 4 5 RAFAEL BAÑON1, DAVID VILLEGAS-RÍOS2, ALBERTO SERRANO3, 6 GONZALO MUCIENTES2,4 & JUAN CARLOS ARRONTE3 7 8 9 10 1 Servizo de Planificación, Dirección Xeral de Recursos Mariños, Consellería de Pesca 11 e Asuntos Marítimos, Rúa do Valiño 63-65, 15703 Santiago de Compostela, Spain. E- 12 mail: [email protected] 13 2 CSIC. Instituto de Investigaciones Marinas. Eduardo Cabello 6, 36208 Vigo 14 (Pontevedra), Spain. E-mail: [email protected] (D. V-R); [email protected] 15 (G.M.). 16 3 Instituto Español de Oceanografía, C.O. de Santander, Santander, Spain. E-mail: 17 [email protected] (A.S); [email protected] (J.-C. A). 18 4Centro Tecnológico del Mar, CETMAR. Eduardo Cabello s.n., 36208. Vigo 19 (Pontevedra), Spain. 20 21 Abstract 22 23 An annotated checklist of the marine fishes from Galician waters is presented. The list 24 is based on historical literature records and new revisions. The ichthyofauna list is 25 composed by 397 species very diversified in 2 superclass, 3 class, 35 orders, 139 1 1 families and 288 genus. The order Perciformes is the most diverse one with 37 families, 2 91 genus and 135 species. Gobiidae (19 species) and Sparidae (19 species) are the 3 richest families. Biogeographically, the Lusitanian group includes 203 species (51.1%), 4 followed by 149 species of the Atlantic (37.5%), then 28 of the Boreal (7.1%), and 17 5 of the African (4.3%) groups. We have recognized 41 new records, and 3 other records 6 have been identified as doubtful.
    [Show full text]
  • Intrinsic Vulnerability in the Global Fish Catch
    The following appendix accompanies the article Intrinsic vulnerability in the global fish catch William W. L. Cheung1,*, Reg Watson1, Telmo Morato1,2, Tony J. Pitcher1, Daniel Pauly1 1Fisheries Centre, The University of British Columbia, Aquatic Ecosystems Research Laboratory (AERL), 2202 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada 2Departamento de Oceanografia e Pescas, Universidade dos Açores, 9901-862 Horta, Portugal *Email: [email protected] Marine Ecology Progress Series 333:1–12 (2007) Appendix 1. Intrinsic vulnerability index of fish taxa represented in the global catch, based on the Sea Around Us database (www.seaaroundus.org) Taxonomic Intrinsic level Taxon Common name vulnerability Family Pristidae Sawfishes 88 Squatinidae Angel sharks 80 Anarhichadidae Wolffishes 78 Carcharhinidae Requiem sharks 77 Sphyrnidae Hammerhead, bonnethead, scoophead shark 77 Macrouridae Grenadiers or rattails 75 Rajidae Skates 72 Alepocephalidae Slickheads 71 Lophiidae Goosefishes 70 Torpedinidae Electric rays 68 Belonidae Needlefishes 67 Emmelichthyidae Rovers 66 Nototheniidae Cod icefishes 65 Ophidiidae Cusk-eels 65 Trachichthyidae Slimeheads 64 Channichthyidae Crocodile icefishes 63 Myliobatidae Eagle and manta rays 63 Squalidae Dogfish sharks 62 Congridae Conger and garden eels 60 Serranidae Sea basses: groupers and fairy basslets 60 Exocoetidae Flyingfishes 59 Malacanthidae Tilefishes 58 Scorpaenidae Scorpionfishes or rockfishes 58 Polynemidae Threadfins 56 Triakidae Houndsharks 56 Istiophoridae Billfishes 55 Petromyzontidae
    [Show full text]
  • Field Identification Guide to the Living Marine Resources of the Eastern
    Abdallah, M. 2002. Length-weight relationship of fishes caught by trawl off Alexandria, Egypt. Naga ICLARM Q. 25(1):19–20. Abdul Malak, D., Livingstone, S., Pollard, D., Polidoro, B., Cuttelod, A., Bariche, M., Bilecenoglu, M., Carpenter, K., Collette, B., Francour, P., Goren, M., Kara, M., Massutí, E., Papaconstantinou, C. & Tunesi L. 2011. Overview of the Conservation Status of the Marine Fishes of the Mediterranean Sea. Gland, Switzerland and Malaga, Spain: IUCN, vii + 61 pp. (also available at http://data.iucn.org/dbtw-wpd/edocs/RL-262-001.pdf). Abecasis, D., Bentes, L., Ribeiro, J., Machado, D., Oliveira, F., Veiga, P., Gonçalves, J.M.S & Erzini, K. 2008. First record of the Mediterranean parrotfish, Sparisoma cretense in Ria Formosa (south Portugal). Mar. Biodiv. Rec., 1: e27. DOI: 10.1017/5175526720600248x. Abella, A.J., Arneri, E., Belcari, P., Camilleri, M., Fiorentino, F., Jukic-Peladic, S., Kallianiotis, A., Lembo, G., Papacostantinou, C., Piccinetti, C., Relini, G. & Spedicato, M.T. 2002. Mediterranean stock assessment: current status, problems and perspective: Sub-Committee on Stock Assessment, Barcelona. 18 pp. Abellan, E. & Basurco, B. 1999. Finfish species diversification in the context of Mediterranean marine fish farming development. Marine finfish species diversification: current situation and prospects in Mediterranean aquaculture. CIHEAM/FAO, 9–27. CIHEAM/FAO, Zaragoza. ACCOBAMS, May 2009 www.accobams.org Agostini, V.N. & Bakun, A. 2002. “Ocean triads” in the Mediterranean Sea: physical mechanisms potentially structuring reproductive habitat suitability (with example application to European anchovy, Engraulis encrasicolus), Fish. Oceanogr., 3: 129–142. Akin, S., Buhan, E., Winemiller, K.O. & Yilmaz, H. 2005. Fish assemblage structure of Koycegiz Lagoon-Estuary, Turkey: spatial and temporal distribution patterns in relation to environmental variation.
    [Show full text]
  • (Pisces: Triglidae) in the Northern Mediterranean Sea
    Mediterranean demersal resources and ecosystems: SCIENTIA MARINA 83S1 25 years of MEDITS trawl surveys December 2019, 101-116, Barcelona (Spain) M.T. Spedicato, G. Tserpes, B. Mérigot and ISSN-L: 0214-8358 E. Massutí (eds) https://doi.org/10.3989/scimar.04856.30A Spatial and temporal trend in the abundance and distribution of gurnards (Pisces: Triglidae) in the northern Mediterranean Sea Francesco Colloca 1,2, Giacomo Milisenda 3, Francesca Capezzuto 4, Alessandro Cau 5, Germana Garofalo 1, Angélique Jadaud 6, Sotiris Kiparissis 7, Reno Micallef 8, Stefano Montanini 9, Ioannis Thasitis 10, Maria Vallisneri 9, Alessandro Voliani 11, Nedo Vrgoc 12, Walter Zupa 13, Francesc Ordines 14 1 National Research Council, Istituto per le Risorse Biologiche e le Biotecnologie Marine (CNR-IRBIM), Mazara del Vallo (TP), Italy. (FC) (Corresponding author) E-mail: [email protected]. ORCID iD: https://orcid.org/0000-0002-0574-2893 (GG) E-mail: [email protected]. ORCID iD: https://orcid.org/0000-0001-9117-6252 2 Department of Biology and Biotechnology “C. Darwin” BBCD, Sapienza University of Rome, Italy. 3 Stazione Zoologica Anton Dohrn, Lungomare Cristoforo Colombo (ex complesso Roosevelt), 90142 Palermo, Italy. (GM) E-mail: [email protected]. ORCID iD: https://orcid.org/0000-0003-1334-9749 4 Department of Biology, University of Bari Aldo Moro, Bari, Italy. (FC) E-mail: [email protected]. ORCID iD: https://orcid.org/0000-0002-1498-0228 5 Department of Life and Environmental Sciences, Via Tommaso Fiorelli 1, University of Cagliari, Cagliari, Italy. (AC) E-mail: [email protected]. ORCID iD: https://orcid.org/0000-0003-4082-7531 6 MARBEC - IFREMER, CNRS, IRD, Université Montpellier 2, Avenue Jean Monnet, CS 30171, 34203 Sète Cedex, France.
    [Show full text]
  • SOME ASPECTS of the REPRODUCTIVE BIOLOGY of the LONG FIN GURNARD ASPITRIGLA OBSCURA (LINNAEUS, 1764) in DERNAH COAST, EASTERN LIBYA Mohammad A
    International Journal of Fisheries and Aquaculture Research Vol.4, No.1, pp.1-8, February 2018 ___Published by European Centre for Research Training and Development UK (www.eajournals.org) SOME ASPECTS OF THE REPRODUCTIVE BIOLOGY OF THE LONG FIN GURNARD ASPITRIGLA OBSCURA (LINNAEUS, 1764) IN DERNAH COAST, EASTERN LIBYA Mohammad A. El-Mabrouk*, Ramadan A. S. Ali and Sayed M. Ali Zoology Department, Faculty of Science, Omar Almokhtar University, P.O. Box 919 Albaida, Libya ABSTRACT: The reproductive biology of 389 specimens of Aspitrigla obscura (Family: Triglidae) obtained from catches collected by gill and trammel nets from Dernah coast, eastern Libya, Mediterranean Sea, was established during a one year study period (April, 2013 to January 2014). There were monthly variations in sex ratio between males (193 fish = 49.6%) and females (196 fish = 50.4%). The overall sex ratio was 1: 1.02 in favor of females. The breeding season extended from December to May. Oocyte diameters increased gradually and progressively during October (87 ± 4.27 μm) to December (250 ± 40.38 μm), then recorded highest values of 367 ± 41.39 in January to 567 ± 21.14 in May. The average absolute fecundity ranged from 535±33.9 in October to 8891±1231.4 in May for fish of total length ranging from 19.1 to 33.9 cm.. Overall absolute fecundity was 5875±503.1, whereas overall relative fecundity was 176±23.3cm-1. KEYWORDS: Triglidae, Aspitrigla Obscura, the Long Fin Gurnard, Reproductive Biology, Mediterranean Sea, Eastern Libya. INTRODUCTION Family Triglidae includes bottom fish dwellers occurring over sand, muddy sand or gravel beds at depth from 56 to 200m, but is more common between 50 and 170 m (Hureau, 1986).
    [Show full text]
  • Mediterranean Sea
    OVERVIEW OF THE CONSERVATION STATUS OF THE MARINE FISHES OF THE MEDITERRANEAN SEA Compiled by Dania Abdul Malak, Suzanne R. Livingstone, David Pollard, Beth A. Polidoro, Annabelle Cuttelod, Michel Bariche, Murat Bilecenoglu, Kent E. Carpenter, Bruce B. Collette, Patrice Francour, Menachem Goren, Mohamed Hichem Kara, Enric Massutí, Costas Papaconstantinou and Leonardo Tunesi MEDITERRANEAN The IUCN Red List of Threatened Species™ – Regional Assessment OVERVIEW OF THE CONSERVATION STATUS OF THE MARINE FISHES OF THE MEDITERRANEAN SEA Compiled by Dania Abdul Malak, Suzanne R. Livingstone, David Pollard, Beth A. Polidoro, Annabelle Cuttelod, Michel Bariche, Murat Bilecenoglu, Kent E. Carpenter, Bruce B. Collette, Patrice Francour, Menachem Goren, Mohamed Hichem Kara, Enric Massutí, Costas Papaconstantinou and Leonardo Tunesi The IUCN Red List of Threatened Species™ – Regional Assessment Compilers: Dania Abdul Malak Mediterranean Species Programme, IUCN Centre for Mediterranean Cooperation, calle Marie Curie 22, 29590 Campanillas (Parque Tecnológico de Andalucía), Málaga, Spain Suzanne R. Livingstone Global Marine Species Assessment, Marine Biodiversity Unit, IUCN Species Programme, c/o Conservation International, Arlington, VA 22202, USA David Pollard Applied Marine Conservation Ecology, 7/86 Darling Street, Balmain East, New South Wales 2041, Australia; Research Associate, Department of Ichthyology, Australian Museum, Sydney, Australia Beth A. Polidoro Global Marine Species Assessment, Marine Biodiversity Unit, IUCN Species Programme, Old Dominion University, Norfolk, VA 23529, USA Annabelle Cuttelod Red List Unit, IUCN Species Programme, 219c Huntingdon Road, Cambridge CB3 0DL,UK Michel Bariche Biology Departement, American University of Beirut, Beirut, Lebanon Murat Bilecenoglu Department of Biology, Faculty of Arts and Sciences, Adnan Menderes University, 09010 Aydin, Turkey Kent E. Carpenter Global Marine Species Assessment, Marine Biodiversity Unit, IUCN Species Programme, Old Dominion University, Norfolk, VA 23529, USA Bruce B.
    [Show full text]
  • Trophic Niche Overlap Between Flatfishes in a Nursery Area on the Portuguese Coast*
    SCI. MAR., 66 (3): 293-300 SCIENTIA MARINA 2002 Trophic niche overlap between flatfishes in a nursery area on the Portuguese coast* HENRIQUE N. CABRAL1, MARTA LOPES1 and RALF LOEPER2 1 Instituto de Oceanografia, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal. E-mail: [email protected] 2 Johannes-Gutenberg Universität Mainz, Saarstrass 21, 55099 Mainz, Germany SUMMARY: The diets and the trophic niche overlap between seven flatfish species were studied in a coastal nursery adjoin- ing to the Tagus estuary (Portugal). Fish were sampled monthly, from March to November 1999, using a beach seine. Arnoglossus imperialis (Rafinesque, 1810), Arnoglossus laterna (Walbaum, 1792) and Arnoglossus thori Kyle, 1913, fed mainly on crustaceans. The diets of Buglossidium luteum (Risso, 1810) and Dicologoglossa cuneata (Moreau, 1881) were mainly composed of Bivalvia and Polychaeta, while for Scophthalmus rhombus (Linnaeus, 1758) the main food items were Mysidacea and Teleostei. The diet of Pegusa lascaris (Risso, 1810) was mainly composed by Cumacea, Bivalvia, Decapo- da and Amphipoda. Based on diet similarities two main groups were identified: one composed of A. imperialis, A. laterna, A. thori and S. rhombus, and the other grouping B. luteum, P. lascaris and D. cuneata. For the most common flatfishes, a similar pattern of diet seasonal variation was found, such that Amphipoda presented higher indices values in the period from March to June, while from July to November, Decapoda were more abundant. Although high values of diet overlap were obtained among some of the species, the main items in the diet of flatfishes are probably the most abundant prey in this coastal area, which suggests a generalist and opportunistic utilization of these food resources.
    [Show full text]
  • Length-Weight Relationships of Marine Fish Collected from Around the British Isles
    Science Series Technical Report no. 150 Length-weight relationships of marine fish collected from around the British Isles J. F. Silva, J. R. Ellis and R. A. Ayers Science Series Technical Report no. 150 Length-weight relationships of marine fish collected from around the British Isles J. F. Silva, J. R. Ellis and R. A. Ayers This report should be cited as: Silva J. F., Ellis J. R. and Ayers R. A. 2013. Length-weight relationships of marine fish collected from around the British Isles. Sci. Ser. Tech. Rep., Cefas Lowestoft, 150: 109 pp. Additional copies can be obtained from Cefas by e-mailing a request to [email protected] or downloading from the Cefas website www.cefas.defra.gov.uk. © Crown copyright, 2013 This publication (excluding the logos) may be re-used free of charge in any format or medium for research for non-commercial purposes, private study or for internal circulation within an organisation. This is subject to it being re-used accurately and not used in a misleading context. The material must be acknowledged as Crown copyright and the title of the publication specified. This publication is also available at www.cefas.defra.gov.uk For any other use of this material please apply for a Click-Use Licence for core material at www.hmso.gov.uk/copyright/licences/ core/core_licence.htm, or by writing to: HMSO’s Licensing Division St Clements House 2-16 Colegate Norwich NR3 1BQ Fax: 01603 723000 E-mail: [email protected] 3 Contents Contents 1. Introduction 5 2.
    [Show full text]