European Trawlers Are Destroying the Oceans
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FAO Fisheries & Aquaculture
Food and Agriculture Organization of the United Nations Fisheries and for a world without hunger Aquaculture Department Fishing Techniques Midwater Pair Trawling Main Components Aquatic species Target Species Semi-pelagic/demersal species Atlantic herring European pilchard(=Sardine) Seabream Hake Seabass European sprat Target Species Pelagic species Gear types: Midwater pair trawls Midwater pair trawls It has similar characteristics as midwater trawls used with otter boards. Vessel types: Pair trawlers In the wet-fish trawler the fish is kept in the hold in the fresh/"wet" condition. Characteristics Midwater pair trawling Species Environment Midwater pair trawling can be effective in different situations: when fish are aggregated into large dense shoals and when (at another season or time of the day or according to physiological status) fishes are regularly distributed within a given water layer. In addition to the difference it makes whether the FAO Fisheries and Aquaculture Department fish are aggregated in a small volume or spread within a large one, fish may swim (and avoid the net) at different speeds according to its own physiological status and/or other external conditions. As a result, in addition to the fish which is targeted, other different conditions will affect the design and size of the midwater trawl, as well as the towing speed. Fishing Gear A midwater pair trawl has roughly similar design as other midwater trawls. Midwater pair trawls might, however, be designed to have a more rectangular opening than ordinary midwater otter trawls. Midwater pair trawls might be rigged with two towing warps from each vessel or alternatively with one towing warp from each vessel and a bridle arrangement. -
The Feeding Ecology of Grey Gurnard, Eutrigla Gurnardus, Off the Coast of Scotland
The Feeding Ecology of Grey Gurnard, Eutrigla gurnardus, off the coast of Scotland. Abstract Until recently, little research had been conducted into the feeding ecology of grey gurnard (Eutrigla gurnardus), and the species’ wider interaction with the ecosystems it inhabits. This study was carried out to address several questions that have recently arisen about the species. Mainly whether the grey gurnard population at Rockall Bank have been predating on the juvenile haddock to a degree that could cause the stock to decline. This was assessed by conducting a stomach contents analysis on a sample of grey gurnard caught on several trawls. The results of this were inconclusive, with only 3 stomachs containing potential haddock remains out of a total of 121 stomachs. However, these results do not completely disprove the hypothesis, as other factors may have influenced the low fish intake in these gurnard. Furthermore, the populations of grey gurnard from Rockall Bank and the Firth of Forth were compared to determine any differences in feeding ecology between the two. It emerged that the two populations were reasonably similar, with smaller size classes consuming less fish and proportionally more invertebrates, while larger size classes had a diet that was predominantly fish, with the fish prey consisting largely of sand eels. Finally, the influence of fish size on prey selection was investigated, with the result showing a clear correlation between increasing fish size and increasing prey mass, likely owing to the greater amount of fish prey that makes up a larger gurnard’s diet. Introduction: Grey gurnard, Eutrigla gurnadus, is a demersal marine species that has a wide distribution throughout the North Atlantic and the North Sea (Vinogradov et al., 2014; Floeter et al., 2005). -
Red Gurnard in the North East Atlantic, Demersal Otter Trawl
Red gurnard in the North East Atlantic, Demersal otter trawl Red gurnard in the North East Atlantic, Demersal otter trawl Content last updated 27th Jan 2016 Stock: Red gurnard in the North East Atlantic Management: EU Overview Red gurnard (Chelidonichthys cuculus) is a widespread demersal species on the Northeast Atlantic shelf, distributed from South Norway and north of the British Isles to Mauritania. The species is found in depths between 20 and 250m living on gravel or coarse sandy substrate. Higher occurrences of red gurnard with patchy distribution have been observed along the Western approaches from the Shetlands Islands to the Celtic Seas and the Channel. A continuous distribution of fish crossing the Channel and the area West of Brittany does not suggest a separation of the Divisions VIId from VIIe and VIIh. Therefore a split of the population between the Ecoregions does not seem appropriate. Further investigations are needed to progress on stocks boundaries such as morphometric studies, tagging and genetic population studies. Red gurnard feeds on a variety of small invertebrates, bottom dwelling fish and benthic shellfish and crustaceans. Length at first maturity has been reported at approximately 25cm. Spawning occurs between February and June. Currently, all red gurnards in the Northeast Atlantic are treated as a single stock. Considering their behaviour, future assessment and management should identify and treat separate spawning aggregations independently. Red gurnard is mainly taken as a bycatch in mixed demersal fisheries for flatfish and roundfish, as the market is limited a larger part of the gurnard catch is discarded. Gurnards have been landed as a mixed generic gurnard catch and therefore landings of red gurnard are uncertain. -
Lobsters-Identification, World Distribution, and U.S. Trade
Lobsters-Identification, World Distribution, and U.S. Trade AUSTIN B. WILLIAMS Introduction tons to pounds to conform with US. tinents and islands, shoal platforms, and fishery statistics). This total includes certain seamounts (Fig. 1 and 2). More Lobsters are valued throughout the clawed lobsters, spiny and flat lobsters, over, the world distribution of these world as prime seafood items wherever and squat lobsters or langostinos (Tables animals can also be divided rougWy into they are caught, sold, or consumed. 1 and 2). temperate, subtropical, and tropical Basically, three kinds are marketed for Fisheries for these animals are de temperature zones. From such partition food, the clawed lobsters (superfamily cidedly concentrated in certain areas of ing, the following facts regarding lob Nephropoidea), the squat lobsters the world because of species distribu ster fisheries emerge. (family Galatheidae), and the spiny or tion, and this can be recognized by Clawed lobster fisheries (superfamily nonclawed lobsters (superfamily noting regional and species catches. The Nephropoidea) are concentrated in the Palinuroidea) . Food and Agriculture Organization of temperate North Atlantic region, al The US. market in clawed lobsters is the United Nations (FAO) has divided though there is minor fishing for them dominated by whole living American the world into 27 major fishing areas for in cooler waters at the edge of the con lobsters, Homarus americanus, caught the purpose of reporting fishery statis tinental platform in the Gul f of Mexico, off the northeastern United States and tics. Nineteen of these are marine fish Caribbean Sea (Roe, 1966), western southeastern Canada, but certain ing areas, but lobster distribution is South Atlantic along the coast of Brazil, smaller species of clawed lobsters from restricted to only 14 of them, i.e. -
Consultancy Report an Overview )F Vessels, Gearand Fishingtechniques Practicedin the Fisheriesof Peru
Consultancy Report An Overview )f Vessels, Gearand FishingTechniques Practicedin the Fisheriesof Peru Peru: Export Trade and Development Program 527-0349-A-00-1275-00 Prepared by: W. Douglas Souter Prepared for: Agricultural Cooperative Development International 50 F Street, NW, Suite 900 Washington, DC 20001 Phone: 202/638-4661 Fax: 202/626-8726 December 7, 1993 AN OVERVIEW OF VESSELS, GEAR AND FISHING TECHNIQUES PRACTICED IN THE FISHERIES OF PERU Submitted to: Asociaci6n de Exportadores (ADEX) Avenida Santo Toribio 151 San Isidro Lima, PERU By: W. Douglas Souter San Diego, California For: Agricultural Cooperative Development International Washington, D.C. December 7, 1993 CONTENTS I. PREFACE .............................................. 1 II. PROJECT OBJECTIVES ................................... 2 III. EXECUTIVE SUMMARY ................................. 3 IV. BACKGROUND ............................................. 7 V. PURSE SEINE VESSELS ENGAGED IN THE ANCHOVETA/ SARDINA/JUREL/CABELLA FISHERY .................. 8 Background 8 Discussion and Recommendations 9 VI. BOTTOM-TRAWL VESSELS ENGAGED IN THE MERLUSA FISHERY.. 11 Background 11 Operating and On-Board Handling Practices 12 Discussion end Recommendations 12 VII. BOTTOM PAIR TRAWLING FOR MERLUSA ..................... 14 Background 14 Vessels 15 Trawl Nets 15 Discussion and Recommendations 16 VIII. MID-WATER TRAWLING .............................. 18 IX. SINGLE VESSEL MID-WATER TRAWLING FOR JUREL AND CABELLA .................. ....... o.............o........ 19 Background 19 Vessels 19 Trawl Nets 20 Discussion and Recommendations 20 X. MID-WATER PAIR TRAWLING FOR JUREL AND CABALLA........ 21 Background 21 Vessels 21 Trawl Nets 21 Discussion and Recommendations 22 XI. VESSEL REFRIGERATION ....................... ........ 23 Refrigerated Sea Water 23 Pumping System 23 Fish Hold 23 Refrigeration Systems 24 Chilled Sea Water 26 Icing of Fish 29 XII. VESSEL SANITATION .............. ...................... 30 Discussion and Recommendations 30 CONTENTS Page XIII. -
Coreopsideae Daniel J
Chapter42 Coreopsideae Daniel J. Crawford, Mes! n Tadesse, Mark E. Mort, "ebecca T. Kimball and Christopher P. "andle HISTORICAL OVERVIEW AND PHYLOGENY In a cladistic analysis of morphological features of Heliantheae by Karis (1993), Coreopsidinae were reported Morphological data to be an ingroup within Heliantheae s.l. The group was A synthesis and analysis of the systematic information on represented in the analysis by Isostigma, Chrysanthellum, tribe Heliantheae was provided by Stuessy (1977a) with Cosmos, and Coreopsis. In a subsequent paper (Karis and indications of “three main evolutionary lines” within "yding 1994), the treatment of Coreopsidinae was the the tribe. He recognized ! fteen subtribes and, of these, same as the one provided above except for the follow- Coreopsidinae along with Fitchiinae, are considered ing: Diodontium, which was placed in synonymy with as constituting the third and smallest natural grouping Glossocardia by "obinson (1981), was reinstated following within the tribe. Coreopsidinae, including 31 genera, the work of Veldkamp and Kre# er (1991), who also rele- were divided into seven informal groups. Turner and gated Glossogyne and Guerreroia as synonyms of Glossocardia, Powell (1977), in the same work, proposed the new tribe but raised Glossogyne sect. Trionicinia to generic rank; Coreopsideae Turner & Powell but did not describe it. Eryngiophyllum was placed as a synonym of Chrysanthellum Their basis for the new tribe appears to be ! nding a suit- following the work of Turner (1988); Fitchia, which was able place for subtribe Jaumeinae. They suggested that the placed in Fitchiinae by "obinson (1981), was returned previously recognized genera of Jaumeinae ( Jaumea and to Coreopsidinae; Guardiola was left as an unassigned Venegasia) could be related to Coreopsidinae or to some Heliantheae; Guizotia and Staurochlamys were placed in members of Senecioneae. -
Sistema De Clasificación Artificial De Las Magnoliatas Sinántropas De Cuba
Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver Tesis doctoral de la Univerisdad de Alicante. Tesi doctoral de la Universitat d'Alacant. 2007 Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver PROGRAMA DE DOCTORADO COOPERADO DESARROLLO SOSTENIBLE: MANEJOS FORESTAL Y TURÍSTICO UNIVERSIDAD DE ALICANTE, ESPAÑA UNIVERSIDAD DE PINAR DEL RÍO, CUBA TESIS EN OPCIÓN AL GRADO CIENTÍFICO DE DOCTOR EN CIENCIAS SISTEMA DE CLASIFICACIÓN ARTIFICIAL DE LAS MAGNOLIATAS SINÁNTROPAS DE CUBA Pedro- Pabfc He.r retira Qltver CUBA 2006 Tesis doctoral de la Univerisdad de Alicante. Tesi doctoral de la Universitat d'Alacant. 2007 Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver PROGRAMA DE DOCTORADO COOPERADO DESARROLLO SOSTENIBLE: MANEJOS FORESTAL Y TURÍSTICO UNIVERSIDAD DE ALICANTE, ESPAÑA Y UNIVERSIDAD DE PINAR DEL RÍO, CUBA TESIS EN OPCIÓN AL GRADO CIENTÍFICO DE DOCTOR EN CIENCIAS SISTEMA DE CLASIFICACIÓN ARTIFICIAL DE LAS MAGNOLIATAS SINÁNTROPAS DE CUBA ASPIRANTE: Lie. Pedro Pablo Herrera Oliver Investigador Auxiliar Centro Nacional de Biodiversidad Instituto de Ecología y Sistemática Ministerio de Ciencias, Tecnología y Medio Ambiente DIRECTORES: CUBA Dra. Nancy Esther Ricardo Ñapóles Investigador Titular Centro Nacional de Biodiversidad Instituto de Ecología y Sistemática Ministerio de Ciencias, Tecnología y Medio Ambiente ESPAÑA Dr. Andreu Bonet Jornet Piiofesjar Titular Departamento de EGdfegfe Universidad! dte Mearte CUBA 2006 Tesis doctoral de la Univerisdad de Alicante. Tesi doctoral de la Universitat d'Alacant. 2007 Sistema de clasificación artificial de las magnoliatas sinántropas de Cuba. Pedro Pablo Herrera Oliver I. INTRODUCCIÓN 1 II. ANTECEDENTES 6 2.1 Historia de los esquemas de clasificación de las especies sinántropas (1903-2005) 6 2.2 Historia del conocimiento de las plantas sinantrópicas en Cuba 14 III. -
Cadmium Uptake Kinetics in Parts of the Seagrass Cymodocea Nodosa
Malea et al. J of Biol Res-Thessaloniki (2018) 25:5 https://doi.org/10.1186/s40709-018-0076-4 Journal of Biological Research-Thessaloniki RESEARCH Open Access Cadmium uptake kinetics in parts of the seagrass Cymodocea nodosa at high exposure concentrations Paraskevi Malea1*, Theodoros Kevrekidis2, Konstantina‑Roxani Chatzipanagiotou1 and Athanasios Mogias2 Abstract Background: Seagrass species have been recommended as biomonitors of environmental condition and as tools for phytoremediation, due to their ability to concentrate anthropogenic chemicals. This study aims to provide novel information on metal accumulation in seagrasses under laboratory conditions to support their use as a tool in the evaluation and abatement of contamination in the feld. We investigated the kinetics of cadmium uptake into adult leaf blades, leaf sheaths, rhizomes and roots of Cymodocea nodosa in exposure concentrations within the range of 1 cadmium levels in industrial wastewater (0.5–40 mg L− ). Results: A Michaelis–Menten-type equation satisfactorily described cadmium accumulation kinetics in seagrass 1 parts, particularly at 0.5–5 or 10 mg L− . However, an S equation best described the uptake kinetics in rhizomes at 1 1 5 mg L− and roots at 10 and 20 mg L− . Equilibrium concentration and uptake rate tended to increase with the exposure concentration, indicating that seagrass displays a remarkable accumulation capacity of cadmium and refect high cadmium levels in the surrounding medium. Concerning leaf blades and rhizomes, the bioconcentration factor at equilibrium (range 73.3–404.3 and 14.3–86.3, respectively) was generally lower at higher exposure concentrations, indicating a gradual reduction of available binding sites. -
Published Estimates of Life History Traits for 84 Populations of Teleost
Summary of data on fishing pressure group (G), age at maturity (Tm, years), length at maturity (Lm, cm), length-at-5%-survival (L.05, cm), time-to-5%-survival 3 (T.05, years), slope of the log-log fecundity-length relationship (Fb), fecundity the year of maturity (Fm), and egg volume (Egg, mm ) for the populations listed in the first three columns. Period is the period of field data collection. Species Zone Period G Tm Lm L.05 T.05 Fb Fm Egg Data sources (1) (1) (2) (3) (4) (4) (5) (1) (2) (3) (4) (5) Clupeiformes Engraulis capensis S. Africa 71-74 2 1 9.5 11.8 1.8 3.411 4.856E+04 0.988 118 119 137 118 138 Engraulis encrasicholus B. Biscay 87-92 2 1 11.5 14 1.4 3.997 9.100E+04 1.462 125 30, 188 170, 169 133, 23 145 Medit. S. 84-90 1 1 12.5 13.4 2.3 4.558 9.738E+04 0.668 161 161 160 161, 120 120 Sprattus sprattus Baltic S. 85-91 1 2 12 13.8 6.2 2.84 2.428E+05 1.122 15 19 26 184, 5 146 North S. 73-77 1 2 11.5 14.3 3 4.673 8.848E+03 0.393 8 107 106 33 169 Clupea harengus Baltic S. 75-82 1 3 16 24 4.9 3.206 4.168E+04 0.679 116 191 191 116 169 North S. 60-69 3 3 22 26.9 2.7 4.61 2.040E+04 0.679 52 53, 7 52 39 169 Baltic S. -
Global Seagrass Distribution and Diversity: a Bioregional Model ⁎ F
Journal of Experimental Marine Biology and Ecology 350 (2007) 3–20 www.elsevier.com/locate/jembe Global seagrass distribution and diversity: A bioregional model ⁎ F. Short a, , T. Carruthers b, W. Dennison b, M. Waycott c a Department of Natural Resources, University of New Hampshire, Jackson Estuarine Laboratory, Durham, NH 03824, USA b Integration and Application Network, University of Maryland Center for Environmental Science, Cambridge, MD 21613, USA c School of Marine and Tropical Biology, James Cook University, Townsville, 4811 Queensland, Australia Received 1 February 2007; received in revised form 31 May 2007; accepted 4 June 2007 Abstract Seagrasses, marine flowering plants, are widely distributed along temperate and tropical coastlines of the world. Seagrasses have key ecological roles in coastal ecosystems and can form extensive meadows supporting high biodiversity. The global species diversity of seagrasses is low (b60 species), but species can have ranges that extend for thousands of kilometers of coastline. Seagrass bioregions are defined here, based on species assemblages, species distributional ranges, and tropical and temperate influences. Six global bioregions are presented: four temperate and two tropical. The temperate bioregions include the Temperate North Atlantic, the Temperate North Pacific, the Mediterranean, and the Temperate Southern Oceans. The Temperate North Atlantic has low seagrass diversity, the major species being Zostera marina, typically occurring in estuaries and lagoons. The Temperate North Pacific has high seagrass diversity with Zostera spp. in estuaries and lagoons as well as Phyllospadix spp. in the surf zone. The Mediterranean region has clear water with vast meadows of moderate diversity of both temperate and tropical seagrasses, dominated by deep-growing Posidonia oceanica. -
XENOPHON PAPER “Blue Growth As a Driver for Regional Development”
Matt eo Bocci, Frédérick Herpers, Thanos Smanis, Christophe Le Visage Thodoros E. Kampouris • Andrew Kennedy • Nataliia Korzhunova Emmanouil Nikolaidis • Natalia Zubchenko No16 XENOPHON PAPER “Blue Growth as a Driver for Regional Development” October 2018 2 XENOPHON PAPER no 16 The International Centre for Black Sea Studies (ICBSS) was founded in 1998 as a not-for-profit organisation. It has since fulfilled a dual function: on the one hand, it is an independent research and training institution focusing on the Black Sea region. On the other hand, it is a related body of the Organisation of the Black Sea Economic Cooperation (BSEC) and in this capacity serves as its acknowledged think-tank. Thus the ICBSS is a uniquely positioned independent expert on the Black Sea area and its regional cooperation dynamics. ___________________________________ The ICBSS launched the Xenophon Paper series in July 2006 with the aim to contribute a space for policy analysis and debate on topical issues concerning the Black Sea region. As part of the ICBSS’ independent activities, the Xenophon Papers are prepared either by members of its own research staff or by externally commissioned experts. While all contributions are peer-reviewed in order to assure consistent high quality, the views expressed therein exclusively represent the authors. The Xenophon Papers are available for download in electronic version from the ICBSS’ webpage under www.icbss.org. In its effort to stimulate open and engaged debate, the ICBSS also welcomes enquiries and contributions from its read- ers under [email protected]. XENOPHON PAPER no 16 3 Matt eo Bocci • Frédérick Herpers • Thanos Smanis • Christophe Le Visage Thodoros E. -
Report of the Committee on Sustainable Fisheries TRANSLATION CSF WP 1/10
TRANSLATION Report of the Committee on Sustainable Fisheries TRANSLATION CSF WP 1/10 Table of Contents Page I. Summary 3 II. Preface 6 III. Current Situations and Challenges of the International and 10 Local Fisheries Industries IV. Goals and Directions of the Sustainable Development of the 22 Local Fisheries Industry V. Proposed Options and Measures 23 VI. Conclusions 44 Annex 46 2 TRANSLATION CSF WP 1/10 I. Summary The Government established the Committee on Sustainable Fisheries (the Committee) in late December 2006 to study the long term directions and goals as well as feasible options and strategy for the sustainable development of the local fisheries industry. The results of the study will be submitted to the Food and Health Bureau for consideration. 2. Following careful consideration of the situations of the international and local fisheries industries, as well as the contributions of the local fisheries industry to Hong Kong’s economy and society, the Committee agrees that the local fisheries industry has changed in tandem with Hong Kong’s economic development. However, the local fisheries industry, as an important local cultural asset with a long history, is sufficiently valuable and has potential for sustainable development. 3. The goals of the sustainable development of the fisheries industry are to enable fishermen and fish farmers to achieve self-reliance, help them maintain their own livelihoods and cope with the changing business operating environment, provide job opportunities to the fisheries community and ensure the supply of fresh and quality fisheries products to Hong Kong people. Meanwhile, our society will benefit from a sustainable fisheries industry, as it will help establish and maintain a marine ecological environment that is abundant in resources and can be passed on to our future generations.