A Practical Guide to Effective Design and Management of Mpas For

Total Page:16

File Type:pdf, Size:1020Kb

A Practical Guide to Effective Design and Management of Mpas For A PRACTICAL GUIDE TO THE REPORT EFFECTIVE DESIGN AND 2019 MANAGEMENT OF MPAs FOR SHARKS AND RAYS This project has been a collaboration between the Centre LEAD AUTHOR: for Sustainable Tropical Fisheries and Aquaculture Cassandra L Rigby, James Cook (CSTFA) at James Cook University, Australia, and WWF. University ABOUT WWF AUTHORS: WWF is one of the largest and most experienced Colin Simpendorfer, James Cook independent conservation organizations, with over University 5 million supporters and a global network active in Andy Cornish, WWF-Hong Kong more than 100 countries. WWF´s mission is to stop the degradation of the planet´s natural environment and to build a future in which humans live in harmony with HOW TO CITE THIS WORK: nature, by conserving the world´s biological diversity, Rigby, C.L., Simpfendorfer, C.A. ensuring that the use of renewable resources is and A. Cornish (2019) A Practical sustainable, and promoting the reduction of pollution Guide to Effective Design and and wasteful consumption. WWF works to reverse Management of MPAs for Sharks declining shark populations through Sharks: Restoring and Rays. WWF, Gland, Switzerland. the Balance, a global initiative. www.panda.org DESIGN AND PRODUCTION: sharks.panda.org Evan Jeffries, Catherine Perry – Swim2Birds Ltd ABOUT CSTFA www.swim2birds.co.uk Research within the Centre for Sustainable Tropical Fisheries and Aquaculture (CSTFA) focuses not only Published in May 2019 by WWF on the aquatic and aquaculture systems that produce – World Wide Fund for Nature, food, but also the industries and communities that Gland, Switzerland utilise them. Multidisciplinary collaborations between our researchers provide the synergies to address Any reproduction in full or part substantial research problems in a way that individual must mention the title and credit research groups cannot. CSTFA provides research the above-mentioned publisher as outputs for sustainable food production to local, state, the copyright owner. federal and international resource managers, both in government and in the private sector. Thus, making us a key player in helping secure aquatic food production COVER PHOTOGRAPH: in the tropics for future generations. © naturepl.com / Cheryl-Samantha www.jcu.edu.au/tropical-fisheries-and-aquaculture Owen / WWF WWF and James Cook University would like to thank the Shark Conservation Fund for its financial support of the James Cook University-led project, ‘Maximising outcomes for shark and ray MPAs’, that contributed significantly to the production of content for this Guide. Thanks also to the project’s partner institutions – the Australian Institute of Marine Science, the University of Queensland and Simon Fraser University – and to the project team for their input, comments and thoughts. WWF International, WWF-Germany and WWF-Netherlands provided the financial resources to produce and print this guide. CONTENTS ABOUT SECTION 3 SECTION 6 ABOUT THIS GUIDE 5 SPATIAL FISHERIES 16 DESIGNING SHARK 32 MEASURES AND RAY MPAS SECTION 1 SECTION 4 SECTION 7 EXISTING MPAS 6 DEFINING GOALS 20 MONITORING AND 40 AND OBJECTIVES FOR EVALUATION SHARK AND RAY MPAS SECTION 2 SECTION 5 INDEX EFFECTIVE MPA 12 KEY INFORMATION 24 INFORMATION, 44 MANAGEMENT REQUIRED FOR ACKNOWLEDGEMENTS PLANNING SHARK AND REFERENCES AND RAY MPAS 3 MPA Guide | Sharks and Rays 2019 FEATURE 4 DATA 4 MPA Guide | Sharks and Rays 2019 DATA The Office of the Comptroller of benefitted from waivers from certain the Currency is warning banks provisions of the SRA Handbook, an to review their risk management extraordinarily dangerous precedent for programs and take necessary a licensing authority, which purports to precautions against escalating be consumer-focused, to establish. attacks by fraud-minded hackers. Once again, the security of the waivers from rules rooted in the LSA and In an alert issued to national banks designed for the protection of the and federal savings associations, the consumer, enables ABSs to operate regulator is warning of Distributed their business and adopt practices Denial of Service (DDoS) attacks being which are not necessarily consistent used to perpetrate customer account with the best interests of clients. In fraud. A DDoS attack seeks to deny addition, the recentABOUT removal of the THIS GUIDE Internet access to b ‘sunset clause’ in the LSA to allow viser who is ‘tied’ to certain products. ABSs to remain in the Solicitors’ Concentrating on the latter, the new Compensatio Shark and ray numbers are declining globally, rule is dangerous, because it allows and a quarter of all species are believed to be legal practices to absolve themselves threatened with extinction.1 Marine protected of all responsibility by transferring the areas (MPAs) can potentially play a key role risk to the financial adviser. Further, the in protecting and conserving shark and ray absence of any incentive to monitor the populations – but for MPAs to be effective their performance of the financial adviser to planning, design and management need to ascertain whether or not the referral reflect the unique characteristics of these species. was in the client’s best interests could actually encourage lawyers to make MPAs for sharks and rays need clear goals, objectives referrals where the risk transfer is in line and conservation targets. They must incorporate with their own interests. the considerable scientific knowledge on shark and ray movement, biology and habitat use alongside ABS WAIVER POLICY socioeconomic and cultural considerations; and they Another case in point is the treatment must be well managed and enforced in the long term. of Alternative Business Structure (ABS) applications during the SRA’s first 12 This Guide has been produced to provide practical, months as a licensing authority. When science-based advice on how to maximize the the concept of non-lawyer ownership effectiveness of both new and existing shark and ray was unveiled, legitimate concerns were MPAs, to ensure these animals are protected now raised over the SRA’s ability to properly and far into the future. While it will be of interest to assess the suitability of prospective, anyone wanting to know more about the subject, it’s and in some cases, international, particularly aimed at: © Jarrett Corke / WWF-Canada © Jarrett investors in ABSs. In response, the SRA asserted that it was acutely aware ● Authorities responsible for marine habitat and of the risks posed to consumers by species protection complex structures and the involvement ● National fisheries managers of external investors. However, the ● Regional fisheries management organizations regulator’s credibility was subsequently (RFMOs) called into question when three of ● NGOs and other conservation practitioners the first seven ABS licences granted ● Shark and ray tourism operators. 5 MPA Guide | Sharks and Rays 2019 SECTION 1 EXISTING MPAS ● Introduction to MPAs ● Shark and ray species suited to MPAs ● Key features of effective shark and ray MPAs © Daniel Versteeg / WWF © Daniel Versteeg SECTION 1 EXISTING MPAS SHARKS AND RAYS IN CRISIS Sharks and rays are facing a global crisis. Many species are in decline due to overfishing,2 while populations are also being impacted by habitat degradation and loss.3 To compound these pressures, sharks and rays tend to be slow to recover when their numbers fall: they typically grow slowly, mature at a late age, and have few young. The conservation of sharks and rays is urgent and crucial. Many species play vital roles in the marine ecosystem, and their loss would cause major long- term issues for the environment.4 They’re also important for food security, and they generate income in many countries through fishing and tourism.5 © Ethan Daniels / WWF INTRODUCTION: fishing and retention of shark and ray The majority of these shark and ray products, and sometimes a ban on all MPAs encompass countries’ entire SPATIAL MANAGEMENT trade of shark and ray products, all within a exclusive economic zones (EEZs), AND MPAS clearly defined area. They may also include and are sometimes referred to as Support is growing for the use of seasonally closed areas, spatial fishery ‘shark sanctuaries’. Their large size spatial management to protect closures, and fishing gear restrictions. helps ensure they have the potential sharks and rays. Its purpose is to to protect not only inshore coastal protect sharks and rays from major species but also the highly mobile threats, such as overfishing and sharks and rays that range into habitat loss, as well as to reduce open waters offshore. the level of these impacts. Most shark and ray MPAs have Marine protected areas (MPAs) are the only been in place since 2009: as main tool used in spatial management. they’re relatively new, monitoring, They come in many forms – from large, evaluation and adaptive zoned multiple-use areas to small management are particularly no-take marine reserves – all aiming important. to restrict activities that affect marine IN 2018, SOME 38 life within a defined area, thereby EXISTING SHARK There are also many general MPAs benefiting biodiversity and improving 38 AND RAY MPAS that have been implemented to 6 ecosystem resilience. MPA governance COVERED A TOTAL protect a broad range of marine species and habitats. Although they varies widely, from government control AREA OF ABOUT to local management. aren’t designed solely for sharks 21 MILLION and rays, they do provide protection Some MPAs have been implemented 21 KM2, OR when they’re large enough and specifically for shark and ray conservation in the right areas to cover key – in this Guide, we refer to them as 6% OF THE movements, critical habitats or life ‘shark and ray MPAs’. These usually OCEAN SURFACE stages, such as nursery areas or incorporate a ban on shark and ray 6% breeding grounds.7 7 MPA Guide | Sharks and Rays 2019 SECTION 1 EFFECTIVE SHARK AND RAY MPAS EFFECTIVE MPAS PROTECT PROTECT POSITIVE REDUCE SPECIES FROM CRITICAL CONSERVATION MORTALITY KEY THREATS HABITATS OUTCOMES © naturepl.com / Doug Perrine WWF © naturepl.com habitats for part or all of their blacknose shark, can be protected lives tend to benefit the most.
Recommended publications
  • The Fishing and Illegal Trade of the Angelshark DNA Barcoding
    Fisheries Research 206 (2018) 193–197 Contents lists available at ScienceDirect Fisheries Research journal homepage: www.elsevier.com/locate/fishres The fishing and illegal trade of the angelshark: DNA barcoding against T misleading identifications ⁎ Ingrid Vasconcellos Bunholia, Bruno Lopes da Silva Ferrettea,b, , Juliana Beltramin De Biasia,b, Carolina de Oliveira Magalhãesa,b, Matheus Marcos Rotundoc, Claudio Oliveirab, Fausto Forestib, Fernando Fernandes Mendonçaa a Laboratório de Genética Pesqueira e Conservação (GenPesC), Instituto do Mar (IMar), Universidade Federal de São Paulo (UNIFESP), Santos, SP, 11070-102, Brazil b Laboratório de Biologia e Genética de Peixes (LBGP), Instituto de Biociências de Botucatu (IBB), Universidade Estadual Paulista (UNESP), Botucatu, SP, 18618-689, Brazil c Acervo Zoológico da Universidade Santa Cecília (AZUSC), Universidade Santa Cecília (Unisanta), Santos, SP, 11045-907, Brazil ARTICLE INFO ABSTRACT Handled by J Viñas Morphological identification in the field can be extremely difficult considering fragmentation of species for trade Keywords: or high similarity between congeneric species. In this context, the shark group belonging to the genus Squatina is Conservation composed of three species distributed in the southern part of the western Atlantic. These three species are Endangered species classified in the IUCN Red List as endangered, and they are currently protected under Brazilian law, which Fishing monitoring prohibits fishing and trade. Molecular genetic tools are now used for practical taxonomic identification, parti- Forensic genetics cularly in cases where morphological observation is prevented, e.g., during fish processing. Consequently, DNA fi Mislabeling identi cation barcoding was used in the present study to track potential crimes against the landing and trade of endangered species along the São Paulo coastline, in particular Squatina guggenheim (n = 75) and S.
    [Show full text]
  • Fishing, Finning and Tourism: Trends in Pacific Shark Conservation and Management
    J MARINE MARTINUS AND COASTAL The International Journal of LAW PUBLISHERS Marine and Coastal Law 27 (2012) 597-621 brill.nl/cstu Fishing, Finning and Tourism: Trends in Pacific Shark Conservation and Management Erika J.Techera Faculty of Law, The University of Western Australia, Cravirley WA, Australia Absttact Sharks have a key position in the ocean food chain and their removal could have far-reaching implications beyond the species themselves. Yet since the 1980s the harvesting of sharks, pri- marily for their fins, and their extraction as bycatch have resulted in a rapid decline in num- bers. It is against this backdrop that the Pacific is leading the way in legal developments for shark conservation: from the US shark conservation law, and finning bans in Hawai'i, the Gommonwealth of the Northern Mariana Islands and Guam, to the declaration of Palau's shark sanctuary. These national initiatives have been complemented by regional action, includ- ing the adoption of a Regional Plan of Action for sharks by the Pacific nations. This article examines the legal developments and the emerging leadership role the region is taking. The lessons that they offer are explored, as well as some of the remaining challenges. Keywords environmental law; fisheries; Pacific islands; sharks; tourism; marine sanctuaries Introduction The Pacific tegion is one of the most significant fisheries in the world, conttib- uting around 54% of global marine catches.' The Westetn and Central Pacific Fisheries Commission (WCPFC) area, fot example, provides mote than 50% of world tuna catch.^ Harvests have steadily increased in this region: 2007 produced the highest annual catch recorded to date,^ and the majotity of gtowth is in the offshore sector."* Many of the Pacific nations detive significant ' The Food and Agriculture Organization (FAO) reports that in 2008, the Northwest Pacific, Southeast Pacific and Central Western Pacific fisheries contributed 25%, 15% and 14%, respectively: FAO, State of the Worlds Eisheries and Aquaculture 2010 (FAO, Rome 2010), 35.
    [Show full text]
  • Review of the Fishery Status for Whaler Sharks (Carcharhinus Spp.) in South Australian and Adjacent Waters
    Review of the Fishery Status for Whaler Sharks (Carcharhinus spp.) in South Australian and adjacent waters Keith Jones FRDC Project Number 2004/067 January 2008 SARDI Aquatic Sciences Publication No. F2007/000721-1 SARDI Research Series No. 154 1 Review of the fishery status for whaler sharks in South Australian and adjacent waters. Final report to the Fisheries Research and Development Corporation. By: G.Keith Jones South Australian Research & Development Institute 2 Hamra Ave, West Beach SA 5022 (Current Address: PIRSA (Fisheries Policy) GPO Box 1625 Adelaide, SA 5001. Telephone: 08 82260439 Facsimile: 08 82262434 http://www.pirsa.saugov.sa.gov.au DISCLAIMER The author warrants that he has taken all reasonable care in producing this report. The report has been through the SARDI internal review process, and has been formally approved for release by the Chief Scientist. Although all reasonable efforts have been made to ensure quality, SARDI Aquatic Sciences does not warrant that the information in this report is free from errors or omissions. SARDI does not accept any liability for the contents of this report or for any consequences arising from its use or any other reliance placed upon it. © Copyright Fisheries Research and Development Corporation and South Australian Research & Development Institute, 2005.This work is copyright. Except as permitted under the Copyright Act 1968 (Commonwealth), no part of this publication may be reproduced by any process, electronic or otherwise, without the specific permission of the copyright owners. Neither may information be stored electronically in any form whatsoever without such permission. The Fisheries Research and Development Corporation plans, invests in and manages fisheries research and development throughout Australia.
    [Show full text]
  • Extinction Risk and Conservation of the World's Sharks and Rays
    RESEARCH ARTICLE elife.elifesciences.org Extinction risk and conservation of the world’s sharks and rays Nicholas K Dulvy1,2*, Sarah L Fowler3, John A Musick4, Rachel D Cavanagh5, Peter M Kyne6, Lucy R Harrison1,2, John K Carlson7, Lindsay NK Davidson1,2, Sonja V Fordham8, Malcolm P Francis9, Caroline M Pollock10, Colin A Simpfendorfer11,12, George H Burgess13, Kent E Carpenter14,15, Leonard JV Compagno16, David A Ebert17, Claudine Gibson3, Michelle R Heupel18, Suzanne R Livingstone19, Jonnell C Sanciangco14,15, John D Stevens20, Sarah Valenti3, William T White20 1IUCN Species Survival Commission Shark Specialist Group, Department of Biological Sciences, Simon Fraser University, Burnaby, Canada; 2Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, Canada; 3IUCN Species Survival Commission Shark Specialist Group, NatureBureau International, Newbury, United Kingdom; 4Virginia Institute of Marine Science, College of William and Mary, Gloucester Point, United States; 5British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom; 6Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, Australia; 7Southeast Fisheries Science Center, NOAA/National Marine Fisheries Service, Panama City, United States; 8Shark Advocates International, The Ocean Foundation, Washington, DC, United States; 9National Institute of Water and Atmospheric Research, Wellington, New Zealand; 10Global Species Programme, International Union for the Conservation
    [Show full text]
  • Specification for Arctic Topographic Mapping 1:50 000
    Specification for Arctic topographic mapping 1:50 000 Edition 1.0 June 2015 Table of contents Preface ............................................................................................................................................................... 4 Content .......................................................................................................................................................... 4 Editors ............................................................................................................................................................ 4 Technical requirements ..................................................................................................................................... 5 Quality ........................................................................................................................................................... 5 Editors addresses ........................................................................................................................................... 8 Object catalogue ................................................................................................................................................ 9 Object class TRAFFIC .................................................................................................................................... 11 ROAD ....................................................................................................................................................... 11
    [Show full text]
  • Environmental Factors Influencing Whale Shark Occurrence and Movements at Mafia Island, Tanzania
    ENVIRONMENTAL FACTORS INFLUENCING WHALE SHARK OCCURRENCE AND MOVEMENTS AT MAFIA ISLAND, TANZANIA Christoph A. Rohner & Simon J. Pierce | Marine Megafauna Foundation Michael Berumen, Jesse Cochran & Fernando Cagua | KAUST University Mathias Igulu & Baraka Kuguru | Tanzanian Fisheries Research Institute Jason Rubens | World Wide Fund for Nature WWF Project Report Environmental factors influencing whale shark occurrence & movements at Mafia Island, Tanzania Christoph A. Rohner 1 & Simon J. Pierce 1,2 Michael Berumen3,4, Jesse Cochran3 & Fernando Cagua3 Mathias Igulu5 & Baraka Kuguru5 Jason Rubens6 1 Manta Ray and Whale Shark Research Centre, Marine Megafauna Foundation, Praia do Tofo, Inhambane, Mozambique 2 Wild Me, Praia do Tofo, Inhambane, Mozambique 3 Coral Reef Ecology Laboratory, Red Sea Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia 4 Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, United States of America 5 Tanzania Fisheries Research Institute (TAFIRI), Dar es Salaam, Tanzania 6 World Wide Fund for Nature, Dar es Salaam, Tanzania Chris Rohner: [email protected] +255 (0)76 490 0044 Simon Pierce: [email protected] +44 74 288 39945 Michael Berumen: [email protected] +966 54 470 0019 Mathias Igulu: [email protected] +255 (0)78 684 4878 Jason Rubens: [email protected] +255 (0)75 422 9450 WWF – Mafia Island whale shark study 1. Executive Summary The whale shark Rhincodon typus is the largest fish in the world. Its size, gentle nature and tendency to swim at the surface in predictable coastal aggregation sites means that it can be a focal species for marine tourists. Whale sharks are categorised on the IUCN Red List as ‘Vulnerable’ to extinction following fishery-induced declines in some parts of the world.
    [Show full text]
  • Florida's Fintastic Sharks and Rays Lesson and Activity Packet
    Florida's Fintastic Sharks and Rays An at-home lesson for grades 3-5 Produced by: This educational workbook was produced through the support of the Indian River Lagoon National Estuary Program. 1 What are sharks and rays? Believe it or not, they’re a type of fish! When you think “fish,” you probably picture a trout or tuna, but fishes come in all shapes and sizes. All fishes share the following key characteristics that classify them into this group: Fishes have the simplest of vertebrate hearts with only two chambers- one atrium and one ventricle. The spine in a fish runs down the middle of its back just like ours, making fish vertebrates. All fishes have skeletons, but not all fish skeletons are made out of bones. Some fishes have skeletons made out of cartilage, just like your nose and ears. Fishes are cold-blooded. Cold-blooded animals use their environment to warm up or cool down. Fins help fish swim. Fins come in pairs, like pectoral and pelvic fins or are singular, like caudal or anal fins. Later in this packet, we will look at the different types of fins that fishes have and some of the unique ways they are used. 2 Placoid Ctenoid Ganoid Cycloid Hard protective scales cover the skin of many fish species. Scales can act as “fingerprints” to help identify some fish species. There are several different scale types found in bony fishes, including cycloid (round), ganoid (rectangular or diamond), and ctenoid (scalloped). Cartilaginous fishes have dermal denticles (Placoid) that resemble tiny teeth on their skin.
    [Show full text]
  • Oceanography and Marine Biology an Annual Review Volume 58
    Oceanography and Marine Biology An Annual Review Volume 58 Edited by S. J. Hawkins, A. L. Allcock, A. E. Bates, A. J. Evans, L. B. Firth, C. D. McQuaid, B. D. Russell, I. P. Smith, S. E. Swearer, P. A. Todd First edition published 2021 ISBN: 978-0-367-36794-7 (hbk) ISBN: 978-0-429-35149-5 (ebk) Chapter 4 The Oceanography and Marine Ecology of Ningaloo, A World Heritage Area Mathew A. Vanderklift, Russell C. Babcock, Peter B. Barnes, Anna K. Cresswell, Ming Feng, Michael D. E. Haywood, Thomas H. Holmes, Paul S. Lavery, Richard D. Pillans, Claire B. Smallwood, Damian P. Thomson, Anton D. Tucker, Kelly Waples & Shaun K. Wilson (CC BY-NC-ND 4.0) Oceanography and Marine Biology: An Annual Review, 2020, 58, 143–178 © S. J. Hawkins, A. L. Allcock, A. E. Bates, A. J. Evans, L. B. Firth, C. D. McQuaid, B. D. Russell, I. P. Smith, S. E. Swearer, P. A. Todd, Editors Taylor & Francis THE OCEANOGRAPHY AND MARINE ECOLOGY OF NINGALOO, A WORLD HERITAGE AREA MATHEW A. VANDERKLIFT1, RUSSELL C. BABCOCK2, PETER B. BARNES4, ANNA K. CRESSWELL1,3,5, MING FENG1, MICHAEL D. E. HAYWOOD2, THOMAS H. HOLMES6, PAUL S. LAVERY7, RICHARD D. PILLANS2, CLAIRE B. SMALLWOOD8, DAMIAN P. THOMSON1, ANTON D. TUCKER6, KELLY WAPLES6 & SHAUN K. WILSON6 1CSIRO Oceans & Atmosphere, Indian Ocean Marine Research Centre, Crawley, WA, 6009, Australia 2CSIRO Oceans & Atmosphere, Queensland Biosciences Precinct, St Lucia, QLD, 4067, Australia 3School of Biological Sciences, The University of Western Australia, Crawley, WA, 6009, Australia 4Department of Biodiversity, Conservation and Attractions,
    [Show full text]
  • Status of Angelshark, Squatina Squatina (Elasmobranchii: Squatiniformes: Squatinidae) in the Sea of Marmara
    ANNALES · Ser. hist. nat. · 24 · 2014 · 1 Short scientifi c article UDK 597.315.6:591.9(262.53) Received: 2014-05-08 STATUS OF ANGELSHARK, SQUATINA SQUATINA (ELASMOBRANCHII: SQUATINIFORMES: SQUATINIDAE) IN THE SEA OF MARMARA Hakan KABASAKAL & Özgür KABASAKAL Ichthyological Research Society, Tantavi Mahallesi, Mentesoglu Caddesi, Idil Apt., No: 30, D: 4, Umraniye, TR-34764 Istanbul, Turkey E-mail: [email protected] ABSTRACT On 4 January 2014, a female specimen of Squatina squatina was entangled in trammel-net, at a depth of about 50 m. The specimen was 174 cm long (total length) and weighed approximately 35 kg. The recent single capture of S. squatina in the southeastern Sea of Marmara confi rms the contemporary presence of the species in this land- locked small marine region; however, the paucity of the species in the fi shing records of Marmaric fi shes since 2000, confi rms its rarity in the studied marine area. Keywords: Angelshark, Squatina squatina, Sea of Marmara, status, endangered, protection STATO DELL’ANGELO DI MARE, SQUATINA SQUATINA (ELASMOBRANCHII: SQUATINIFORMES: SQUATINIDAE), NEL MARE DI MARMARA SINTESI Il 4 gennaio 2014, una femmina di Squatina squatina è rimasta impigliata in una rete tramaglio, ad una profondità di circa 50 metri. La lunghezza totale dell’esemplare era pari a 174 cm per circa 35 kg di peso. La recente singola cattura di S. squatina nella parte sud-orientale del mare di Marmara conferma la presenza temporanea della specie in questa piccola semichiusa regione marina. Tuttavia, la scarsità di segnalazioni della specie nei registri di cattura della fauna ittica del mare di Marmara dal 2000, conferma la sua rarità nell’area marina studiata.
    [Show full text]
  • Recreational Harvest of Sharks and Rays in Western Australia Is Only a Minor Component of the Total Harvest
    Recreational Harvest of Sharks and Rays in Western Australia is only a Minor Component of the Total Harvest Matias Braccini ( [email protected] ) Department of Primary Industries and Regional Development Eva Lai Department of Primary Industries and Regional Development Karina Ryan Department of Primary Industries and Regional Development Stephen Taylor Department of Primary Industries and Regional Development Research Article Keywords: elasmobranch, conservation, management, sheries, catch reconstruction Posted Date: February 23rd, 2021 DOI: https://doi.org/10.21203/rs.3.rs-225321/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/20 Abstract Sharks and rays are of global conservation concern with an increasing number of species at risk of extinction, mostly attributed to overshing by commercial shing. Their recreational harvest is poorly known but it can be of similar magnitude to the commercial harvest in some regions. We quantied the recreational harvest of sharks and rays in Western Australia, a region with a marine coastline of > 20,000 km. We recorded 33 species/taxonomic groups but the harvest was dominated by dusky and bronze whalers, blacktip reef shark, gummy shark, Port Jackson shark, wobbegongs, and rays and skates. Most species caught were released (85% of all individuals), although gummy and whiskery sharks were typically retained. There was a clear latitudinal gradient of species composition with tropical and subtropical species of the genus Carcharhinus dominating in the north and temperate species of the families Triakidae, Carcharhinidae, Heterodontidae and Rajidae dominating in the south. The recreational harvest was negligible compared with commercial landings.
    [Show full text]
  • Aerial Survey of Northern Gannet (Morus Bassanus) Colonies Off NW Scotland 2013
    Scottish Natural Heritage Commissioned Report No. 696 Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013 COMMISSIONED REPORT Commissioned Report No. 696 Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013 For further information on this report please contact: Andy Douse Scottish Natural Heritage Great Glen House INVERNESS IV3 8NW Telephone: 01463 725000 E-mail: [email protected] This report should be quoted as: Wanless, S., Murray, S. & Harris, M.P. 2015. Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013. Scottish Natural Heritage Commissioned Report No. 696. This report, or any part of it, should not be reproduced without the permission of Scottish Natural Heritage. This permission will not be withheld unreasonably. The views expressed by the author(s) of this report should not be taken as the views and policies of Scottish Natural Heritage. © Scottish Natural Heritage 2015. COMMISSIONED REPORT Summary Aerial survey of northern gannet (Morus bassanus) colonies off NW Scotland 2013 Commissioned Report No. 696 Project No: 14641 Contractor: Centre for Ecology and Hydrology Year of publication: 2015 Keywords Northern gannet; Sula Sgeir; St Kilda; Flannan Islands; Sule Stack: Sule Skerry; gugas; population trends. Background Scottish Natural Heritage (SNH) commissioned an aerial survey of selected colonies of northern gannets (Morus bassanus) off the NW coast of Scotland in 2013. The principal aim was to assess the status of the population in this region, which holds some important, but infrequently counted colonies (St Kilda, Sula Sgeir, Sule Stack, Flannan Islands and Sule Skerry). In addition, an up-to-date assessment was required to review the basis for the licensed taking of young gannets (gugas) from the island of Sula Main findings Aerial surveys of all five colonies were successfully carried out on 18 and 19 June 2013.
    [Show full text]
  • Shark Aggregation and Tourism: Opportunities and Challenges of an Emerging Phenomenon
    Shark aggregation and tourism: Opportunities and challenges of an emerging phenomenon NIR NECKER ZIV ZEMAH SHAMIR , SHIRI ZEMAH SHAMIR NIR BECKER, DEPARTMENT OF ECONOMICS AND MANAGEMENT, TEL-HAI ACADEMIC COLLEGE, ISRAEL. E-MAIL: [email protected] ZIV ZEMAH SHAMIR, Marine Biology Department, M. Kahn Marine Research Station, University of Haifa, Haifa, Israel. E-mail: [email protected] SHIRI ZEMAH SHAMIR, School of Sustainability, Interdisciplinary Center Herzliya, P.O. Box 167, Herzliya 46150, Israel. E-mail: [email protected] Abstract In the last few winters, sharks have been aggregating near the Israeli Mediterranean coast, at a specific point, near Hadera power station. This unusual phenomenon has fascinated residents, visitors, kayakers, divers and swimmers. We analyse the effects of this intense human interest on the sharks, using contingent behaviour, in Hadera and in Ashkelon, where sharks are present but not the infrastructure for their observation. We also report on changes in shark behaviour due to change in tourism intensity. We find a change of about ILS 4.1 million annually for both sites but a larger individual consumer surplus in Hadera, where sharks are currently observable. Touristic intensity crosses the threshold level by about 12% and making the socio-equilibrium sustainable for both humans and sharks would have a social cost of ILS 0.157 million. Keywords: Shark aggregation, shark behaviour, human-wildlife conflict, Mediterranean, Travel cost, tourism. 1 1. Introduction Sharks (superorder Selachimorpha) are characterized by K-selected life history traits, including slow growth, late age-at-maturity and low fecundity. Thus, once a population is depleted, recovery to pre-exploitation levels may take several decades or longer (Kabasakal et al.
    [Show full text]