Global Patterns in Marine Mammal Distributions
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Exploitation of Fur Seals and Sea Lions from Australian, New Zealand and Adjacent Subantarctic Islands During the Eighteenth, Nineteenth and Twentieth Centuries
Exploitation of fur seals and sea lions from Australian, New Zealand and adjacent subantarctic islands during the eighteenth, nineteenth and twentieth centuries John K. Ling P.O. Box 271, Clare, South Australia 5459 ABSTRACT Details of skin cargoes of fur seal Arctocephalus spp. and sea lion Neophoca cinerea and Phocarctos hookeri, originating from southern Australia, New Zealand and the adjacent subantarctic islands in the lath, 19th and 20th centuries have been collated from several secondary historicsl sources. These sources quoted quantities of skins in terms of actual tallied numbers, as untallied "cargoes" or as casks, sacks or bundles. Untallied cargoes were Downloaded from http://meridian.allenpress.com/australian-zoologist/article-pdf/31/2/323/1473420/az_1999_036.pdf by guest on 30 September 2021 converted into numbers by averaging tallied cargoes; and casks, sacks and bundles were arbitrarily deemed to contain 40, 20 and 5 skins respectively. Annual and total yields of skins are presented for ten separate areas in the region: Bass Strait, King Island, Kangaroo Island. Western Australia, New Zealand, Bounty Islands, Auckland Islands, Antipodes Islands. Campbell Island and Macquarie island. At least 1 367 000 fur seal skins were harvested between 1792 and 1948149 in the whole of the Australasian region. More than 1309 000 skins - 96% of the total - were taken up to 1830. Records indicate that only about 4 100 Neophoca and 5 800 Phocarctos were obtained from their respective areas. These figures must be regarded as minimal, as it is likely thatmany cargoes were obtained by English, American and French vessels and shipped directly to European or Asian markets. -
Living Between Rapids: Genetic Structure and Hybridization in Botos (Cetacea: Iniidae: Inia Spp.) of the Madeira River, Brazil
bs_bs_banner Biological Journal of the Linnean Society, 2015, 114, 764–777. With 5 figures Living between rapids: genetic structure and hybridization in botos (Cetacea: Iniidae: Inia spp.) of the Madeira River, Brazil WALESKA GRAVENA1,2*, VERA M. F. DA SILVA2, MARIA N. F. DA SILVA3, IZENI P. FARIAS1 and TOMAS HRBEK1 1Laboratório de Evolução e Genética Animal (LEGAL), Departamento de Genética, Universidade Federal do Amazonas, Av. General Rodrigo Otávio Jordão, 3000, 69077-000, Manaus, Amazonas, Brazil 2Laboratório de Mamíferos Aquáticos, Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, 69011-970, Manaus, Amazonas, Brazil 3Coleção de Mamíferos, Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, 69011-970, Manaus, Amazonas, Brazil Received 2 September 2014; revised 14 November 2014; accepted for publication 15 November 2014 Until the recent construction of hydroelectric dams, a series of 18 rapids divided the upper and lower Madeira River, and these rapids were thought to separate two species of Amazonian freshwater dolphins (boto): Inia boliviensis (above) and I. geoffrensis (below). Some reports and articles, however, mention the occurrence of botos within the rapids region and that they occasionally cross the rapids, but without mentioning the species concerned. Based on our previous studies, it is likely that I. boliviensis occurs in the region of the rapids. To test this supposition, we sampled 18 individuals from this region, and collected mitochondrial (control region, cytochrome b and cytochrome oxidase I) and nuclear (10 microsatellite loci) DNA data, in order to test if there is connectivity between the dolphins that were found within the rapids region and dolphins collected upstream and downstream of the rapids, and investigate population structuring between these localities. -
Ecological Factors Influencing Group Sizes of River Dolphins (Inia Geoffrensis and Sotalia Fluviatilis)
MARINE MAMMAL SCIENCE, **(*): ***–*** (*** 2011) C 2011 by the Society for Marine Mammalogy DOI: 10.1111/j.1748-7692.2011.00496.x Ecological factors influencing group sizes of river dolphins (Inia geoffrensis and Sotalia fluviatilis) CATALINA GOMEZ-SALAZAR Biology Department, Dalhousie University, Halifax, Nova Scotia B3H4J1, Canada and Foundation Omacha, Calle 86A No. 23–38, Bogota, Colombia E-mail: [email protected] FERNANDO TRUJILLO Foundation Omacha, Calle 86A No. 23–38, Bogota, Colombia HAL WHITEHEAD Biology Department, Dalhousie University, Halifax, Nova Scotia B3H4J1, Canada ABSTRACT Living in groups is usually driven by predation and competition for resources. River dolphins do not have natural predators but inhabit dynamic systems with predictable seasonal shifts. These ecological features may provide some insight into the forces driving group formation and help us to answer questions such as why river dolphins have some of the smallest group sizes of cetaceans, and why group sizes vary with time and place. We analyzed observations of group size for Inia and Sotalia over a 9 yr period. In the Amazon, largest group sizes occurred in main rivers and lakes, particularly during the low water season when resources are concentrated; smaller group sizes occurred in constricted waters (channels, tributaries, and confluences) that receive an influx of blackwaters that are poor in nutrients and sediments. In the Orinoco, the largest group sizes occurred during the transitional water season when the aquatic productivity increases. The largest group size of Inia occurred in the Orinoco location that contains the influx of two highly productive whitewater rivers. Flood pulses govern productivity and major biological factors of these river basins. -
56. Otariidae and Phocidae
FAUNA of AUSTRALIA 56. OTARIIDAE AND PHOCIDAE JUDITH E. KING 1 Australian Sea-lion–Neophoca cinerea [G. Ross] Southern Elephant Seal–Mirounga leonina [G. Ross] Ross Seal, with pup–Ommatophoca rossii [J. Libke] Australian Sea-lion–Neophoca cinerea [G. Ross] Weddell Seal–Leptonychotes weddellii [P. Shaughnessy] New Zealand Fur-seal–Arctocephalus forsteri [G. Ross] Crab-eater Seal–Lobodon carcinophagus [P. Shaughnessy] 56. OTARIIDAE AND PHOCIDAE DEFINITION AND GENERAL DESCRIPTION Pinnipeds are aquatic carnivores. They differ from other mammals in their streamlined shape, reduction of pinnae and adaptation of both fore and hind feet to form flippers. In the skull, the orbits are enlarged, the lacrimal bones are absent or indistinct and there are never more than three upper and two lower incisors. The cheek teeth are nearly homodont and some conditions of the ear that are very distinctive (Repenning 1972). Both superfamilies of pinnipeds, Phocoidea and Otarioidea, are represented in Australian waters by a number of species (Table 56.1). The various superfamilies and families may be distinguished by important and/or easily observed characters (Table 56.2). King (1983b) provided more detailed lists and references. These and other differences between the above two groups are not regarded as being of great significance, especially as an undoubted fur seal (Australian Fur-seal Arctocephalus pusillus) is as big as some of the sea lions and has some characters of the skull, teeth and behaviour which are rather more like sea lions (Repenning, Peterson & Hubbs 1971; Warneke & Shaughnessy 1985). The Phocoidea includes the single Family Phocidae – the ‘true seals’, distinguished from the Otariidae by the absence of a pinna and by the position of the hind flippers (Fig. -
Cetaceans: Whales and Dolphins
CETACEANS: WHALES AND DOLPHINS By Anna Plattner Objective Students will explore the natural history of whales and dolphins around the world. Content will be focused on how whales and dolphins are adapted to the marine environment, the differences between toothed and baleen whales, and how whales and dolphins communicate and find food. Characteristics of specific species of whales will be presented throughout the guide. What is a cetacean? A cetacean is any marine mammal in the order Cetaceae. These animals live their entire lives in water and include whales, dolphins, and porpoises. There are 81 known species of whales, dolphins, and porpoises. The two suborders of cetaceans are mysticetes (baleen whales) and odontocetes (toothed whales). Cetaceans are mammals, thus they are warm blooded, give live birth, have hair when they are born (most lose their hair soon after), and nurse their young. How are cetaceans adapted to the marine environment? Cetaceans have developed many traits that allow them to thrive in the marine environment. They have streamlined bodies that glide easily through the water and help them conserve energy while they swim. Cetaceans breathe through a blowhole, located on the top of their head. This allows them to float at the surface of the water and easily exhale and inhale. Cetaceans also have a thick layer of fat tissue called blubber that insulates their internals organs and muscles. The limbs of cetaceans have also been modified for swimming. A cetacean has a powerful tailfin called a fluke and forelimbs called flippers that help them steer through the water. Most cetaceans also have a dorsal fin that helps them stabilize while swimming. -
The Blue Paradox: Preemptive Overfishing in Marine Reserves
PAPER The blue paradox: Preemptive overfishing in COLLOQUIUM marine reserves Grant R. McDermotta,1,2, Kyle C. Mengb,c,d,1,2, Gavin G. McDonaldb,e, and Christopher J. Costellob,c,d,e aDepartment of Economics, University of Oregon, Eugene, OR 97403; bBren School of Environmental Science & Management, University of California, Santa Barbara, CA 93106; cDepartment of Economics, University of California, Santa Barbara, CA 93106; dNational Bureau of Economic Research, Cambridge, MA 02138; and eMarine Science Institute, University of California, Santa Barbara, CA 93106 Edited by Jane Lubchenco, Oregon State University, Corvallis, OR, and approved July 25, 2018 (received for review March 9, 2018) Most large-scale conservation policies are anticipated or an- This line of reasoning suggests that the anticipation of a new nounced in advance. This risks the possibility of preemptive conservation policy may give rise to a set of incentives that is resource extraction before the conservation intervention goes distinct from—but possibly just as important as—the incentives into force. We use a high-resolution dataset of satellite-based fish- arising from the policy’s implementation. While this kind of pre- ing activity to show that anticipation of an impending no-take emptive behavior has been well-documented for landowners, gun marine reserve undermines the policy by triggering an unin- owners, and owners of natural resource extraction rights, it has tended race-to-fish. We study one of the world’s largest marine not been studied in the commons. For vast swaths of the ocean, reserves, the Phoenix Islands Protected Area (PIPA), and find that no single owner has exclusive rights and so must compete against fishers more than doubled their fishing effort once this area was others for extraction. -
Marine Protected Areas (Mpas) in Management 1 of Coral Reefs
ISRS BRIEFING PAPER 1 MARINE PROTECTED AREAS (MPAS) IN MANAGEMENT 1 OF CORAL REEFS SYNOPSIS Marine protected areas (MPAs) may stop all extractive uses, protect particular species or locally prohibit specific kinds of fishing. These areas may be established for reasons of conservation, tourism or fisheries management. This briefing paper discusses the potential uses of MPAs, factors that have affected their success and the conditions under which they are likely to be effective. ¾ MPAs are often established as a conservation tool, allowing protection of species sensitive to fishing and thus preserving intact ecosystems, their processes and biodiversity and ultimately their resilience to perturbations. ¾ Increases in charismatic species such as large groupers in MPAs combined with the perception that the reefs there are relatively pristine mean that MPAs can play a significant role in tourism. ¾ By reducing fishing mortality, effective MPAs have positive effects locally on abundances, biomass, sizes and reproductive outputs of many exploitable site- attached reef species. ¾ Because high biomass of focal species is sought but this is quickly depleted and is slow to recover, poaching is a problem in most reef MPAs. ¾ Target-species ‘spillover’ into fishing areas is likely occurring close to the MPA boundaries and benefits will often be related to MPA size. Evidence for MPAs acting as a source of larval export remains weak. ¾ The science of MPAs is at an early stage of its development and MPAs will rarely suffice alone to address the main objectives of fisheries management; concomitant control of effort and other measures are needed to reduce fishery impacts, sustain yields or help stocks to recover. -
Hunting and Social Behaviour of Leopard Seals (Hydrurga Leptonyx) at Seal Island, South Shetland Islands, Antarctica
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Publications, Agencies and Staff of the U.S. Department of Commerce U.S. Department of Commerce 1999 Hunting and social behaviour of leopard seals (Hydrurga leptonyx) at Seal Island, South Shetland Islands, Antarctica Lisa M. Hiruki National Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, [email protected] Michael K. Schwartz National Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration Peter L. Boveng National Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration Follow this and additional works at: https://digitalcommons.unl.edu/usdeptcommercepub Part of the Environmental Sciences Commons Hiruki, Lisa M.; Schwartz, Michael K.; and Boveng, Peter L., "Hunting and social behaviour of leopard seals (Hydrurga leptonyx) at Seal Island, South Shetland Islands, Antarctica" (1999). Publications, Agencies and Staff of the U.S. Department of Commerce. 151. https://digitalcommons.unl.edu/usdeptcommercepub/151 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 U.S. Department of Commerce by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. J. Zool., Lond. (1999) 249, 97±109 # 1999 The Zoological Society of London Printed in the United Kingdom Hunting and social behaviour of leopard seals (Hydrurga leptonyx) at Seal Island, South Shetland Islands, Antarctica Lisa M. Hiruki*, Michael K. Schwartz{ and Peter L. -
Taxonomic Status of the Genus Sotalia: Species Level Ranking for “Tucuxi” (Sotalia Fluviatilis) and “Costero” (Sotalia Guianensis) Dolphins
MARINE MAMMAL SCIENCE, **(*): ***–*** (*** 2007) C 2007 by the Society for Marine Mammalogy DOI: 10.1111/j.1748-7692.2007.00110.x TAXONOMIC STATUS OF THE GENUS SOTALIA: SPECIES LEVEL RANKING FOR “TUCUXI” (SOTALIA FLUVIATILIS) AND “COSTERO” (SOTALIA GUIANENSIS) DOLPHINS S. CABALLERO Laboratory of Molecular Ecology and Evolution, School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand and Fundacion´ Omacha, Diagonal 86A #30–38, Bogota,´ Colombia F. TRUJILLO Fundacion´ Omacha, Diagonal 86A #30–38, Bogota,´ Colombia J. A. VIANNA Sala L3–244, Departamento de Biologia Geral, ICB, Universidad Federal de Minas Gerais, Avenida Antonio Carlos, 6627 C. P. 486, 31270–010 Belo Horizonte, Brazil and Escuela de Medicina Veterinaria, Facultad de Ecologia y Recursos Naturales, Universidad Andres Bello Republica 252, Santigo, Chile H. BARRIOS-GARRIDO Laboratorio de Sistematica´ de Invertebrados Acuaticos´ (LASIA), Postgrado en Ciencias Biologicas,´ Facultad Experimental de Ciencias,Universidad del Zulia, Avenida Universidad con prolongacion´ Avenida 5 de Julio, Sector Grano de Oro, Maracaibo, Venezuela M. G. MONTIEL Laboratorio de Ecologıa´ y Genetica´ de Poblaciones, Centro de Ecologıa,´ Instituto Venezolano de Investigaciones Cientıficas´ (IVIC), San Antonio de los Altos, Carretera Panamericana km 11, Altos de Pipe, Estado Miranda, Venezuela S. BELTRAN´ -PEDREROS Laboratorio de Zoologia,´ Colec¸ao˜ Zoologica´ Paulo Burheim, Centro Universitario´ Luterano de Manaus, Manaus, Brazil 1 2 MARINE MAMMAL SCIENCE, VOL. **, NO. **, 2007 M. MARMONTEL Sociedade Civil Mamiraua,´ Rua Augusto Correa No.1 Campus do Guama,´ Setor Professional, Guama,´ C. P. 8600, 66075–110 Belem,´ Brazil M. C. SANTOS Projeto Atlantis/Instituto de Biologia da Conservac¸ao,˜ Laboratorio´ de Biologia da Conservac¸ao˜ de Cetaceos,´ Departamento de Zoologia, Universidade Estadual Paulista (UNESP), Campus Rio Claro, Sao˜ Paulo, Brazil M. -
Morphometrics of the Dolphin Genus Lagenorhynchus: Deciphering A
Morphometrics of the dolphin genus Lagenorhynchus: deciphering a contested phylogeny Allison Galezo1,2 and Nicole Vollmer1,3 1 Department of Vertebrate Zoology, Smithsonian Institution National Museum of Natural History 2 Department of Biology, Georgetown University 3 NOAA National Systematics Laboratory Background Results & Analysis Discussion • Our morphological data support the hypothesis that Figure 1. Phenogram from cluster analysis of dolphin skull Figure 2. Species symbols key with sample sizes. measurements. Calculated using Euclidian distances and the genus Lagenorhynchus is not monophyletic, evident Height l La. acutus (24) p C. commersonii (5) a b c Ward’s method. from the separation in the phenogram of La. albirostris Height p C. eutropia (2) Recent phylogenetic studies1-7 have indicated that the Distance l La. albirostris (10) and La. acutus from the other Lagenorhynchus species, 0 2 4 6 8 p genus Lagenorhynchus, currently containing the species 0 2 4 6 8 l La. australis (7) C. heavisidii (1) u Li. borealis (11) and the mix of genera in the lowermost clade (Figure 1). L. obliquidensa, L. acutusb , L. albirostrisc, L. obscurusd , L. l La. obliquidens (28) p C. hectori (2) n Unknown (1) • Our results show that La. obscurus and La. obliquidens e f cruciger , and L. australis , is not monophyletic. These C. commersonii l La. obscurus (15) are very similar morphologically, which supports the C. commersonii species were originally grouped together because of C.C. cocommemmersoniirsonii C. commeC. hersoniictori hypothesis that they are closely related: they have C. commeC. hersoniictori similarities in external morphology and coloration, but C. commeC. hersoniictori Figure 3. -
The Role of Marine Protected Areas in Sustaining Fisheries
The role of marine protected areas in sustaining fisheries Callum Roberts University of York, UK After World War II there was much optimism that fisheries could feed the World. But at the beginning of the 21st century, we are not so sure. Quota management of fisheries in the European Union has failed to deliver sustainability 100 80 60 40 20 Percentage of Quota Fish Stocks of Quota Percentage 0 1970 1975 1980 1985 1990 1995 2000 Year Healthy At risk In danger Data from ICES Cod decline in the Kattegat, North Sea Extinction is the ultimate in unsustainable fishing, whether or not the species of concern are targets of the fishery What is missing from fishery management? • Real provision for habitat protection and recovery • Precautionary targets • Resolute enforcement Objectives of marine reserves Maintaining ecosystem processes and services Conservation Sustaining fisheries Tree cover www.worldwildlife.org/oceans/pdfs/fishery_effects.pdf Spillover Reproduction & Dispersal Colonization & Growth Abundance Diversity What is the evidence that reserves work? Reserves all over the world show dramatic increases in spawning stocks Usually by at least 2-3 times in 5-10 years Long-term studies in New Zealand, Philippines, Florida and many other countries show strong responses to reserve protection Fish in reserves do live longer, grow larger and produce more eggs Egg production from protected fish stocks increases by much more than stock biomass Catches do increase Soufrière Marine Management Area, St. Lucia: Established 1995 35% of reef area closed -
Conservation Status and the Use of Irrawaddy Dolphins As a Flagship
Conservation status and the use of Irrawaddy dolphins as a flagship species for climate adaptation in the Peam Krasop Wildlife Sanctuary, Cambodia Building Resilience to Climate Change Impacts in Coastal Southeast Asia (BCR) Brian Smith, Sun Kong and Lieng Saroeun INTERNATIONAL UNION FOR CONSERVATION OF NATURE The designation of geographical entities in this Citation: Smith, B., Kong, S., and Saroeun, L. book, and the presentation of the material, do not (2014). Conservation status and the use of imply the expression of any opinion whatsoever on Irrawaddy dolphins as a flagship species for climate adaptation in the Peam Krasop Wildlife the part of IUCN or the European Union concerning Sanctuary, Cambodia. Thailand: IUCN. 80pp. the legal status of any country, territory, or area, or of its authorities, or concerning the delimitation of its Cover photo: Dolphins in Koh Kong Province, frontiers or boundaries. The views expressed in this Cambodia © IUCN Cambodia/Sun Kong publication do not necessarily reflect those of IUCN, the European Union or any other participating Layout by: Ria Sen organizations. Produced by: IUCN Southeast Asia Group This publication has been made possible by funding from the European Union. Available from: IUCN Asia Regional Office Published by: IUCN Asia in Bangkok, Thailand 63 Soi Prompong, Sukhumvit 39, Wattana 10110 Bangkok, Thailand Copyright: © 2014 IUCN, International Union for Tel: +66 2 662 4029 Conservation of Nature and Natural Resources IUCN Cambodia Reproduction of this publication for educational or #6B, St. 368, Boeng Keng Kang III, other non-commercial purposes is authorized Chamkarmon, PO Box 1504, Phnom Penh, without prior written permission from the copyright Cambodia holder provided the source is fully acknowledgeRia d.