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Interactions of Patagonian Toothfish Fisheries With
CCAMLR Science, Vol. 17 (2010): 179–195 INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN THE CROZET ISLANDS EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION STRATEGIES P. Tixier1, N. Gasco2, G. Duhamel2, M. Viviant1, M. Authier1 and C. Guinet1 1 Centre d’Etudes Biologiques de Chizé CNRS, UPR 1934 Villiers-en-Bois, 79360 France Email – [email protected] 2 MNHN Paris, 75005 France Abstract Within the Crozet Islands Exclusive Economic Zone (EEZ), the Patagonian toothfish (Dissostichus eleginoides) longline fishery is exposed to high levels of depredation by killer (Orcinus orca) and sperm whales (Physeter macrocephalus). From 2003 to 2008, sperm whales alone, killer whales alone, and the two species co-occurring were observed on 32.6%, 18.6% and 23.4% respectively of the 4 289 hauled lines. It was estimated that a total of 571 tonnes (€4.8 million) of Patagonian toothfish were lost due to depredation by killer whales and both killer and sperm whales. Killer whales were found to be responsible for the largest part of this loss (>75%), while sperm whales had a lower impact (>25%). Photo-identification data revealed 35 killer whales belonging to four different pods were involved in 81.3% of the interactions. Significant variations of interaction rates with killer whales were detected between vessels suggesting the influence of operational factors on depredation. When killer whales were absent at the beginning of the line hauling process, short lines (<5 000 m) provided higher yield and were significantly less impacted by depredation than longer lines. -
Distribution, Habitat and Trophic Ecology of Antarctic
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by NERC Open Research Archive 1 Distribution, habitat and trophic ecology of Antarctic 2 cephalopods: inferences from predators and stable isotopes 3 4 J. Seco1, J. Roberts2, F.Ceia1, A. Baeta1, J. A. Ramos1, V. Paiva1, J.C. Xavier1,2 5 6 1 Institute of Marine Research, Department of Life science, University of Coimbra, Coimbra, Portugal 7 [email protected] 8 9 2 Natural Institute of Water and Atmospheric Research, 301 Evans Bay Parade, Greta Point, PO Box 10 14-901, Kirbirnie, Wellington, New Zealand 11 12 3 British Antarctic Survey, NERC; High Cross, Madingley Road, CB3 0ET, Cambridge, UK 13 14 15 Abstract: 16 Cephalopods play a key role in the marine environment but knowledge of their 17 feeding habits is limited by a lack of observations and this is particularly true for 18 Antarctic species. Toothfish species are key predators of cephalopods and may be 19 viewed as ideal biological samplers of these species. A total of 256 cephalopod lower 20 beaks were identified from the stomachs of Patagonian (Dissostichus eleginoides) and 21 Antarctic toothfish (D. mawsoni), captured in fisheries of South Georgia and the 22 South Sandwich Islands in the South Atlantic. Long-armed octopus squid 23 (Kondakovia longimana) and smooth-hooked squid (Moroteuthis knipovitchi) were 24 the main cephalopod prey and both were predated upon wherever toothfish were 25 captured, though inhabit deeper waters at the South Sandwich Islands than at South 26 Georgia. Measurements of δ 13C from beak material indicated a clear segregation of 27 habitat use comparing adult and sub-adult sized K. -
MARINE FISHERIES Fishing in the Ice: Is It Sustainable?
NIWA Water & Atmosphere 11(3) 2003 MARINE FISHERIES Fishing in the ice: is it sustainable? Stuart Hanchet In recent years an exploratory fishery for The Ross Sea fishery is the southernmost fishery Antarctic toothfish has developed in in the world, and ice conditions and extreme Peter Horn the Ross Sea and in the Southern Ocean to cold make fishing both difficult and dangerous. Michael Stevenson the north. Fisheries in Antarctic waters are During most of the year the Ross Sea is covered managed by CCAMLR (Commission for by ice. However, during January and February the Conservation of Antarctic Marine Living areas of open water (called polynas) form, Resources). CCAMLR takes a precautionary which enable access to the continental shelf and approach to fisheries management and also slope. Longline vessels from New Zealand, has a strong mandate from its members to take South Africa and Russia start working in the A better into account ecosystem effects of fishing. In deep south at this time, but as sea ice forms knowledge of the conjunction with the Ministry of Fisheries they move north and by May are restricted to biology and habits (MFish) and New Zealand fishing companies, the northernmost fishing grounds. Antarctic NIWA has been involved in developing research toothfish has formed over 95% of the fishery’s of the Antarctic programmes to help ensure that the fishery is catch, which has steadily increased from about toothfish is needed both sustainable and has minimal impact on the 40 t in 1998 to over 1800 t in 2003. surrounding ecosystem. to manage a NIWA’s research related to the toothfish in the Ross Sea has concentrated on catch sampling sustainable fishery methods, genetics, age and growth, Antarctic toothfish get for this species in very big. -
Good Whale Hunting Robert L
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Publications, Agencies and Staff of the .SU . U.S. Department of Commerce Department of Commerce 2003 Good Whale Hunting Robert L. Pitman National Marine Fisheries Service Follow this and additional works at: http://digitalcommons.unl.edu/usdeptcommercepub Pitman, Robert L., "Good Whale Hunting" (2003). Publications, Agencies and Staff of ht e U.S. Department of Commerce. 509. http://digitalcommons.unl.edu/usdeptcommercepub/509 This Article is brought to you for free and open access by the U.S. Department of Commerce at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Publications, Agencies and Staff of the .SU . Department of Commerce by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. NATURALIST AT LARGE Good Whale Hunting Two tantalizing Russian reports take the author on a quest to the Antarctic, in search of two previously unrecognized kinds of killer whale. By Robert L. Pitman hey always remind me of witch’s hats—a little bit of THalloween in the winter wonderland. Looking across a flat plain of frozen Antarctic sea ice, I watch as a herd of killer whales swims along a lead—a long, narrow crack in the six- foot-thick ice. The fins of the males are black isosceles triangles, five feet tall, and they look like a band of trick- or-treaters coming our way. I am on board the U.S. Coast Guard icebreaker Polar Star as it back-and-rams the frozen ocean to open up a fourteen- mile-long channel into McMurdo Sta- tion, fifty feet at a whack. -
A Balanced Model of the Food Web of the Ross Sea, Antarctica
CCAMLR Science, Vol. 17 (2010): 1–31 A BALANCED MODEL OF THE FOOD WEB OF THE ROSS SEA, ANTARCTICA M.H. Pinkerton, J.M. Bradford-Grieve National Institute of Water and Atmospheric Research (NIWA) Ltd Private Bag 14901, Wellington 6241 New Zealand Email – [email protected] S.M. Hanchet NIWA Ltd PO Box 893, Nelson 7040 New Zealand Abstract A quantitative food web of the Ross Sea is presented here as a step towards investigating ecosystem effects of the fishery for Antarctic toothfishDissostichus ( mawsoni). The model consolidates quantitative information on trophic links across all the major biota of the Ross Sea and tests for data consistency. The model has 38 trophic groups and is balanced in terms of annual flows of organic carbon in an average recent year (1990–2000). The focus of the model is on the role of Antarctic toothfish in the food web which means that the model has greater taxonomic resolution towards the top of the food web than the base. A survey of the available literature and both published and unpublished data provided an initial set of parameters describing the annual average abundance, imports, exports, energetics (growth, reproduction, consumption) and trophic linkages (diets, key predators) for each model group. The relative level of uncertainty on these parameters was also estimated. This set of parameters was not self consistent, and a method is described to adjust the initial parameter set to give a balanced model, taking into account the estimates of parameter uncertainty and the large range of magnitude (>6 orders of magnitude) in trophic flows between groups. -
Targeted Review of Biological and Ecological Information from Fisheries Research in the South East Marine Region
TARGETED REVIEW OF BIOLOGICAL AND ECOLOGICAL INFORMATION FROM FISHERIES RESEARCH IN THE SOUTH EAST MARINE REGION FINAL REPORT B. D. Bruce, R. Bradford, R. Daley, M. Green and K. Phillips December 2002 Client: National Oceans Office Targeted review of biological and ecological information from fisheries research in the South East Marine Region Final Report B. D. Bruce, R. Bradford, R. Daley M. Green and K. Phillips* CSIRO Marine Research, Hobart * National Oceans Office December 2002 2 Table of Contents: Table of Contents:...................................................................................................................................3 Introduction.............................................................................................................................................5 Objective of review.............................................................................................................................5 Structure of review..............................................................................................................................5 Format.................................................................................................................................................6 General ecological/biological issues and uncertainties for the South East Marine Region ....................9 Specific fishery and key species accounts ............................................................................................10 South East Fishery (SEF) including the South East Trawl -
High Seas Deep-Sea Fishing Grounds in the South East Atlantic Ocean 51
50 Worldwide review of bottom fisheries in the high seas MAP 1 High seas deep-sea fishing grounds in the South East Atlantic Ocean 51 South East Atlantic Ocean FAO Statistical Area 47 (and a portion of 34) GEOGRAPHIC DESCRIPTION OF THE REGION Angola, Namibia and South Africa are the three countries bordering the South East Atlantic Region (FAO Statistical Area 47) along the African coast. This region extends from the Central Atlantic in the north at 6°S to the Southern Ocean in the south at 50°S. The western limit of the South East Atlantic is the 20°W meridian, which means that the southern Mid-Atlantic Ridge is within the region, at around 15°W, and extends over the entire region from north to south. Other important bottom topographic features in this region are the Walvis Ridge and the Valdivia Bank, joining the exclusive economic zone (EEZ) of Tristan da Cunha on the northern part of the Namibian continental shelf at around 18°S, and in the southern part, the Meteor Rise and the Agulhas Ridge. These are the areas largely targeted in the deep-sea bottom fisheries in the region, together with associated or isolated seamounts areas such as Ewing and Molloy Seamounts, Vema Seamount and those in SEAFO Subdivision A1 (SEAFO, 2007a). It is important to note that in the South East Atlantic, the continental shelf along the coasts does not extend beyond the EEZs of the coastal states. MANAGEMENT REGIME APPLICABLE TO DEEP-SEA BOTTOM FISHERIES IN THE HIGH SEAS Regional Fisheries Management Organization/Arrangement The South East Atlantic Fisheries Organisation (SEAFO) was established in 2003 with the entry into force of the Convention on the conservation and management of fisheries resources in the South East Atlantic Ocean. -
Fish in Disguise: Seafood Fraud in Korea
Fish in disguise: Seafood fraud in Korea A briefing by the Environmental Justice Foundation 1 Executive summary Between January and December 2018, the Environmental Justice Foundation (EJF) used DNA testing to determine levels of seafood fraud in the Republic of Korea. The results showed that over a third of samples tested were mislabelled. This mislabelling defrauds consumers, risks public health, harms the marine environment and can be associated with serious human rights abuses across the world. These findings demonstrate the urgent need for greater transparency and traceability in Korean seafood, including imported products. Key findings: • Over a third of seafood samples (34.8%, 105 of 302 samples) genetically analysed were mislabelled. • Samples labelled Fleshy Prawn, Fenneropenaeus chinensis (100%), Japanese Eel, Anguilla japonica (67.7%), Mottled Skate, Raja pulchra (53.3%) and Common Octopus, Octopus vulgaris (52.9%) had the highest rates of mislabelling. • Not a single sample labelled Fleshly Prawn was the correct species. • Mislabelling was higher in restaurants, fish markets and online than in general markets or superstores. • By processed types, sushi (53.9%), fresh fish (38.9%) and sashimi (33.6%) were the most likely to be mislabelled. • The seafood fraud identified by this research has direct negative impacts for consumers. It is clear that for some species sampled consumers were likely to be paying more than they should. For example, more than half of the eel and skate samples that were labelled domestic were actually found to be imported, which can cost only half of the price of domestic products. Swordfish mislabelled as Bluefin Tuna can be sold for four to five times as much. -
The Southern Ocean 118 Worldwide Review of Bottom Fisheries in the High Seas
THE SOUTHERN OCEAN 118 Worldwide review of bottom fisheries in the high seas 30°W 15°W 0° 15°E 30°E °S °S 10 10 47 °S a n t i c °S A t l O c e a 20 n 20 t h o u 41 S Bouvet Prince Edward 51 Island Islands R i d i a g So t e ut S o hern Crozet °S c O o °S S South Georgia ce 30 Island an Islands u 30 t h 48 I n d Kerguelen e Islands g i id a McDonald R g Islands r n Weddell e Heard b Sea Island ss u O 5858 a -G en c el u e rg Bellingshausen e a K 87 n 87 Sea Davis Amundsen Sea n a Sea e c S O o n Ross r e u h S Sea t t outh u o h e 88 S rn O P c ea a n c i °S f °S i M 30 c 30 a O c c qu Macquarie e a a r Island 81 n ie R 57 i d g e °S °S 20 20 Tasman 77 Sea °S °S 10 150°W 165°W 180° 165°E 150°E 10 Antarctic Convergence FAO Fishing Areas 200 nautical miles arcs CCAMLR Regulatory Area Map Projection: Lambert Azimuthal equal area FAO, 2008 MAP 1 The Southern Ocean 119 Southern Ocean FAO Statistical Areas 48, 58 and 88 GEOGRAPHIC DESCRIPTION OF THE REGION The Southern Ocean surrounds the continent of Antarctica, and constitutes about 15 percent of the world’s total ocean surface (CCAMLR, 2000). -
The Values of the Antarctic Toothfish (Dissostichus Mawsoni)
PCAS 15 (2012/2013) Critical Literature Review (ANTA602) The values of the Antarctic Toothfish (Dissostichus mawsoni) Richard Kennedy Student ID: 35501879 Word count: 2957 (excluding abstract and references) Abstract (ca. 200 words): The Antarctic Toothfish (Dissostichus mawsoni) is an apex predator found only in the Southern Ocean. Antarctic Toothfish are commercially harvested. The industry is controversial since it involves humans interfering with a ‘pristine’ environment. Many environmental groups are concerned that Toothfish fishing could be detrimental to the food web structure of the Southern Ocean due to Antarctic Toothfish having an apex role within the ecosystem, being long lived, and the fact that little is known about their reproduction. The fisheries for Toothfish are managed by the Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR). The Toothfish is valuable as an economic resource for nations involved in harvesting, and also valuable from ecological, and scientific perspectives. This industry appears to contradict the environmentally friendly values of New Zealanders; on closer analysis this may not be the case. With careful management the values of the Antarctic Toothfish can be maintained for future generations. Most of the literature comes from the scientific community with little or no publications available from industry bodies on either matters of sustainability or economics. The Antarctic Toothfish (Dissostichus mawsoni) is found only in the Southern Ocean and has been commercially harvested for the past sixteen years. The Antarctic Toothfish industry is controversial, with debate focusing on arguments of economics and of leaving a “pristine untouched” environment. Many environmental groups are concerned that the fishing could be detrimental to the entire food web structure of the Southern Ocean. -
Australia: Reconstructing Estimates of Total Fisheries Removal, 1950-2010
Fisheries Centre The University of British Columbia Working Paper Series Working Paper #2015 - 02 Australia: Reconstructing estimates of total fisheries removal, 1950-2010 Kristin Kleisner, Ciara Brennan, Anna Garland, Stephanie Lingard, Sean Tracey, Phil Sahlqvist, Angelo Tsolos, Daniel Pauly, and Dirk Zeller Year: 2015 Email: [email protected] ; [email protected] This working paper is made available by the Fisheries Centre, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada. Australia - Kleisner et al. 1 AUSTRALIA: RECONSTRUCTING ESTIMATES OF TOTAL FISHERIES REMOVALS 1950-2010 Kristin Kleisnera, Ciara Brennana, Anna Garlandb, Stephanie Lingarda, Sean Traceyc, Phil Sahlqvistd, Angelo Tsolose, Daniel Paulya, and Dirk Zellera a Sea Around Us, Fisheries Centre, University of British Columbia, 2202 Main Mall, Vancouver, V6T 1Z4, Canada b Fisheries Queensland, Department of Agriculture, Fisheries and Forestry, GPO Box 46, Brisbane, Qld 4001, Australia c Institute for Marine and Antarctic Studies, University of Tasmania, Private bag 49, Hobart, Tasmania 7001, Australia d Fisheries and Risk Analysis Branch, ABARES, GPO Box 1563, Canberra ACT 2601, Australia e SARDI SA Aquatic Sciences Centre, Fisheries – Information Services, PO Box 120, Henley Beach, SA 5022 Australia [email protected]; kristen.kleisner @noaa.gov; c [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected]; [email protected] ; [email protected] ABSTRACT Australia’s commercial fisheries are of significant value to the Australian economy, with the twenty Commonwealth fisheries alone worth around AUD$320 million in production value. -
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