Navigating the Monk Seal Maze
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Monk Seals in Post-Classical History
Monk Seals in Post-Classical History The role of the Mediterranean monk seal (Monachus monachus) in European history and culture, from the fall of Rome to the 20th century William M. Johnson Mededelingen No. 39 2004 NEDERLANDSCHE COMMISSIE VOOR INTERNATIONALE NATUURBESCHERMING Mededelingen No. 39 i NEDERLANDSCHE COMMISSIE VOOR INTERNATIONALE NATUURBESCHERMING Netherlands Commission for International Nature Protection Secretariaat: Dr. H.P. Nooteboom National Herbarium of the Netherlands Rijksuniversiteit Leiden Einsteinweg 2 Postbus 9514, 2300 RA Leiden Mededelingen No. 39, 2004 Editor: Dr. H.P. Nooteboom PDF edition 2008: Matthias Schnellmann Copyright © 2004 by William M. Johnson ii MONK SEALS IN POST-CLASSICAL HISTORY The role of the Mediterranean monk seal (Monachus monachus) in European history and culture, from the fall of Rome to the 20th century by William M. Johnson Editor, The Monachus Guardian www.monachus-guardian.org email: [email protected] iii iv TABLE OF CONTENTS MONK SEALS IN POST-CLASSICAL HISTORY ......................................................III ABSTRACT ......................................................................................................................... VII ACKNOWLEDGEMENTS ........................................................................................................ VII MONK SEALS IN POST-CLASSICAL HISTORY ..............................................................................1 AN INTRODUCTION TO THE SPECIES ......................................................................1 -
Marine Mammals of Hudson Strait the Following Marine Mammals Are Common to Hudson Strait, However, Other Species May Also Be Seen
Marine Mammals of Hudson Strait The following marine mammals are common to Hudson Strait, however, other species may also be seen. It’s possible for marine mammals to venture outside of their common habitats and may be seen elsewhere. Bowhead Whale Length: 13-19 m Appearance: Stocky, with large head. Blue-black body with white markings on the chin, belly and just forward of the tail. No dorsal fin or ridge. Two blow holes, no teeth, has baleen. Behaviour: Blow is V-shaped and bushy, reaching 6 m in height. Often alone but sometimes in groups of 2-10. Habitat: Leads and cracks in pack ice during winter and in open water during summer. Status: Special concern Beluga Whale Length: 4-5 m Appearance: Adults are almost entirely white with a tough dorsal ridge and no dorsal fin. Young are grey. Behaviour: Blow is low and hardly visible. Not much of the body is visible out of the water. Found in small groups, but sometimes hundreds to thousands during annual migrations. Habitat: Found in open water year-round. Prefer shallow coastal water during summer and water near pack ice in winter. Killer Whale Status: Endangered Length: 8-9 m Appearance: Black body with white throat, belly and underside and white spot behind eye. Triangular dorsal fin in the middle of the back. Male dorsal fin can be up to 2 m in high. Behaviour: Blow is tall and column shaped; approximately 4 m in height. Narwhal Typically form groups of 2-25. Length: 4-5 m Habitat: Coastal water and open seas, often in water less than 200 m depth. -
Download Full Article in PDF Format
A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans Robert W. BOESSENECKER Department of Geology, University of Otago, 360 Leith Walk, P.O. Box 56, Dunedin, 9054 (New Zealand) and Department of Earth Sciences, Montana State University 200 Traphagen Hall, Bozeman, MT, 59715 (USA) and University of California Museum of Paleontology 1101 Valley Life Sciences Building, Berkeley, CA, 94720 (USA) [email protected] Boessenecker R. W. 2013. — A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans. Geodiversitas 35 (4): 815-940. http://dx.doi.org/g2013n4a5 ABSTRACT e newly discovered Upper Miocene to Upper Pliocene San Gregorio assem- blage of the Purisima Formation in Central California has yielded a diverse collection of 34 marine vertebrate taxa, including eight sharks, two bony fish, three marine birds (described in a previous study), and 21 marine mammals. Pinnipeds include the walrus Dusignathus sp., cf. D. seftoni, the fur seal Cal- lorhinus sp., cf. C. gilmorei, and indeterminate otariid bones. Baleen whales include dwarf mysticetes (Herpetocetus bramblei Whitmore & Barnes, 2008, Herpetocetus sp.), two right whales (cf. Eubalaena sp. 1, cf. Eubalaena sp. 2), at least three balaenopterids (“Balaenoptera” cortesi “var.” portisi Sacco, 1890, cf. Balaenoptera, Balaenopteridae gen. et sp. indet.) and a new species of rorqual (Balaenoptera bertae n. sp.) that exhibits a number of derived features that place it within the genus Balaenoptera. is new species of Balaenoptera is relatively small (estimated 61 cm bizygomatic width) and exhibits a comparatively nar- row vertex, an obliquely (but precipitously) sloping frontal adjacent to vertex, anteriorly directed and short zygomatic processes, and squamosal creases. -
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. -
Letter to K. Baker, 1-29-07
Marine Mammal Commission 4340 East-West Highway, Room 905 Bethesda, MD 20814 29January 2007 Mr. Kyle Baker National Marine Fisheries Service 263 13th Avenue, South St. Petersburg, FL 33701 Dear Mr. Baker: The Marine Mammal Commission, in consultation with its Committee of Scientific Advisors on Marine Mammals, has reviewed the National Marine Fisheries Service’s 29 November 2006 Federal Register notice announcing its intent to conduct a review of the Caribbean monk seal, Monachus tropicalis, under the Endangered Species Act and requesting information on the species’ status. We have reviewed our files and, with great regret, we have concluded that the species is extinct and should be removed from the list of endangered and threatened species. Fossil and archeological evidence, along with sighting records, indicate that the species once occurred from the southeastern United States through the Bahamas and the Caribbean Sea. A review of those records by Rice (1973) concluded that the last authoritative sighting was of a small colony of animals at Seranilla Banks between Jamaica and the Yucatan Peninsula in 1952. A few other unconfirmed sightings were reported from the 1950s into the 1970s, but at least some of those were reported to involve escaped California sea lions (Gunter 1968 cited in Rice 1973). Although the species may have been extinct when the Endangered Species Act was passed in 1973, the Marine Mammal Commission wrote to the National Marine Fisheries Service on 26 January 1977 recommending that the Caribbean monk seal be listed as “endangered” under the Endangered Species Act and “depleted” under the Marine Mammal Protection Act. -
Pinniped Evolution and Puijila Darwini
A pP pP eE nN dD iI xX AE Pinniped Evolution and Puijila darwini Pinnipeds are carnivorous marine mammals that fossils, evolution scientists have not found any defini- have “finned back feet,” similar to the fins used by a tive fossils showing a land mammal evolving into a scuba diver. The Latin-derived word “pinniped” seal, sea lion or walrus. literally means “finned-foot.” Pinnipeds include three Canadian paleobiologist and professor, Dr. Natalia groups of mammals living today; namely, sea lions, Rybczynski of the Canadian Museum of Nature, wrote seals, and walruses. this candid assessment in 2009: The “fossil evidence of By 2007, when the first edition of this book was the morphological steps leading from a terrestrial published, scientists had discovered 20,000 fossil ancestor to the modern marine forms has been weak or pinnipeds. (See Appendix A.) Despite this plethora of contentious.” 1 All three types of pinnipeds Sea lion living today, sea lions (left), walruses (bottom left), and seals (below), have finned back feet, the telltale sign of a pinniped. Seal Walrus Appendix E: Puijila Adarwini p p e n d i x 239 A P P E N D I X EA Enaliarctos—The Oldest Pinniped Enaliarctos, the oldest fossil pinniped, looks like a between a terrestrial ancestor and the appearance of sea lion, and not a missing link. 2 (See photos below.) flippered pinnipeds. Indeed, most studies of pinniped Dr. Natalia Rybczynski highlights this missing link relationships and evolution do not consider the critical problem—the absence of fossils from a land mammal -
UPDATE MARINE MAMMALS Circumpolar Marine Mammal Expert Group, CBMP-Marine
State of the Arctic Marine Biodiversity Report UPDATE MARINE MAMMALS Circumpolar Marine Mammal Expert Group, CBMP-Marine 2021 Polar bear with northern lights, Canada. Photo credit: Ondrej Prosicky/Shutterstock.com In 2017, the State of the Arctic Marine Biodiversity Report (SAMBR) synthesized data about biodiversity in Arctic marine ecosystems around the circumpolar Arctic. SAMBR highlighted observed changes The Circumpolar Biodiversity and relevant monitoring gaps. This document provides an update on Monitoring Program (CBMP) is the status of marine mammals in the circumpolar Arctic from 2015– an adaptive monitoring 2020 (scientific references for factual information and a more detailed program based on an version of the text herein can be found in Kovacs et al. 2021). international network of scientists, government Arctic endemic marine mammals are one focal group of the Circumpolar agencies, Indigenous Biodiversity Monitoring Program’s (CBMP) Arctic Marine Biodiversity organizations and conservation Monitoring Plan (CBMP-Marine Plan), along with sea ice biota, plankton, groups working together to benthos, marine fishes and seabirds. Networks of experts have harmonize and integrate efforts identified key elements, called Focal Ecosystem Components (FECs), to monitor the Arctic’s living within the Arctic marine ecosystem. Changes in the status of FECs resources. The CBMP organizes indicate changes in the broader marine environment. its efforts around the major This update was prepared by the Marine Mammals Expert Network, ecosystems of the Arctic: which works to coordinate monitoring and report scientific findings marine, freshwater, terrestrial regarding trends and their drivers in marine mammal populations and coastal. around the Arctic. In 2011, the CBMP Marine Expert Monitoring Group BACKGROUND published a circumpolar monitoring plan that describes Arctic endemic marine mammals live in close association with sea how Arctic states will compile, ice. -
On Predatory Habits of Atlantic Walrus
lULl.. ~~C'(fh"-<Y.~~\J Stlll~~JW&'VLt.:..l' Olf' PREDATORY HABITS OF ATLANTIC WALRUS c-n p~ ~~ ~ .J IU.K.Timoshenko (SevPINRO), L.A.Popov (VNIRO) n{)AltMti_ jIO.-~ W.JJ\.W'1 -~) WI Predators are known to exist among walruses. There is n~~o~~~O;> ~p tion in literature,however, on any direct observation on the attack I of walruses on other warm-blooded animals, except for the case repor- ted by Pedersen (Pedersen,I962). roo the data available are of particUlar interest. The observations were made on board vessels,helicopters and on ice in the White Sea in the sealing season of the harp seal. Here some examples will be given. ~ young walrus was encountered on the ice in the Nack of the White ~ea at a distance of 34 km west of the Village of Nizhnyaya Zolotitsa on March 4,1983. ~eeing pea.ple it crept down into water. The ice floe was stained with blood. Many traces found on the· snow covering the ice floe evidenced the predator's movements. Some fragments of a white-coat harp seal,e.g. head and fore flippers, were found. A similar caRe when a walrus attacked a harp seal was recorded in March 1976 (Popov,Nazarenko,I977). At that time the observation made on board a helicopter registered a fact that a young male at the age 3 or 4 years emerged from water and trod on a pup of harp seal who stayed on the ice floe without its mother, and disappeared with the pup in water. -
Electrophoretic Variation in Large Mammals. III. the Ringed Seal, Pusa-Hispida, the Harp Seal, Pagophilus-Groenlandicus, and the Hooded Seal, Cystophora-Cristata
University of Montana ScholarWorks at University of Montana Biological Sciences Faculty Publications Biological Sciences 1982 Electrophoretic Variation in Large Mammals. III. The Ringed Seal, Pusa-Hispida, the Harp Seal, Pagophilus-Groenlandicus, and the Hooded Seal, Cystophora-Cristata V. Simonsen Fred W. Allendorf University of Montana - Missoula, [email protected] W. F. Eanes F. O. Kapel Follow this and additional works at: https://scholarworks.umt.edu/biosci_pubs Part of the Biology Commons Let us know how access to this document benefits ou.y Recommended Citation Simonsen, V.; Allendorf, Fred W.; Eanes, W. F.; and Kapel, F. O., "Electrophoretic Variation in Large Mammals. III. The Ringed Seal, Pusa-Hispida, the Harp Seal, Pagophilus-Groenlandicus, and the Hooded Seal, Cystophora-Cristata" (1982). Biological Sciences Faculty Publications. 63. https://scholarworks.umt.edu/biosci_pubs/63 This Article is brought to you for free and open access by the Biological Sciences at ScholarWorks at University of Montana. It has been accepted for inclusion in Biological Sciences Faculty Publications by an authorized administrator of ScholarWorks at University of Montana. For more information, please contact [email protected]. Hereditas 97: 87-90 (1982) Electrophoretic variation in large mammals 111. The ringed seal, Pusa hispida, the harp seal, Pagophilus groenlandicus, and the hooded seal, Cystophora cristata. V. SIMONSEN', F. W. ALLENDORF, W. F. EANES3 and F. 0. KAPEL4 ' Institute of Ecology and Genetics, University of Aarhus, Denmark Department of Zoology, University of Montana, USA ' Department of Ecology and Evolution, State University of New York, Stony Brook, USA Greenland Fisheries Investigations, Charlottenlund, Denmark SIMONSEN, V., ALLENDORF, F. W.,EANES, W. -
From the Late Miocene-Early Pliocene (Hemphillian) of California
Bull. Fla. Mus. Nat. Hist. (2005) 45(4): 379-411 379 NEW SKELETAL MATERIAL OF THALASSOLEON (OTARIIDAE: PINNIPEDIA) FROM THE LATE MIOCENE-EARLY PLIOCENE (HEMPHILLIAN) OF CALIFORNIA Thomas A. Deméré1 and Annalisa Berta2 New crania, dentitions, and postcrania of the fossil otariid Thalassoleon mexicanus are described from the latest Miocene–early Pliocene Capistrano Formation of southern California. Previous morphological evidence for age variation and sexual dimorphism in this taxon is confirmed. Analysis of the dentition and postcrania of Thalassoleon mexicanus provides evidence of adaptations for pierce feeding, ambulatory terrestrial locomotion, and forelimb swimming in this basal otariid pinniped. Cladistic analysis supports recognition of Thalassoleon as monophyletic and distinct from other basal otariids (i.e., Pithanotaria, Hydrarctos, and Callorhinus). Re-evaluation of the status of Thalassoleon supports recognition of two species, Thalassoleon mexicanus and Thalassoleon macnallyae, distributed in the eastern North Pacific. Recognition of a third species, Thalassoleon inouei from the western North Pacific, is questioned. Key Words: Otariidae; pinniped; systematics; anatomy; Miocene; California INTRODUCTION perate, with a very limited number of recovered speci- Otariid pinnipeds are a conspicuous element of the ex- mens available for study. The earliest otariid, tant marine mammal assemblage of the world’s oceans. Pithanotaria starri Kellogg 1925, is known from the Members of this group inhabit the North and South Pa- early late Miocene (Tortonian Stage equivalent) and is cific Ocean, as well as portions of the southern Indian based on a few poorly preserved fossils from Califor- and Atlantic oceans and nearly the entire Southern nia. The holotype is an impression in diatomite of a Ocean. -
Feeding Kinematics and Performance Of
© 2015. Published by The Company of Biologists Ltd | Journal of Experimental Biology (2015) 218, 3229-3240 doi:10.1242/jeb.126573 RESEARCH ARTICLE Feeding kinematics and performance of basal otariid pinnipeds, Steller sea lions and northern fur seals: implications for the evolution of mammalian feeding Christopher D. Marshall1,2,*, David A. S. Rosen3 and Andrew W. Trites3 ABSTRACT pierce or raptorial biting (hereafter referred to as biting), grip-and- Feeding performance studies can address questions relevant to tear, inertial suction (hereafter referred to as suction) and filter feeding ecology and evolution. Our current understanding of feeding feeding (Adam and Berta, 2002). Among otariids, biting, grip- mechanisms for aquatic mammals is poor. Therefore, we and-tear and suction feeding modes are thought to be the most characterized the feeding kinematics and performance of five common. Only one otariid (Antarctic fur seals, Arctocephalus Steller sea lions (Eumetopias jubatus) and six northern fur seals gazella) is known to use filter feeding (Riedman, 1990; Adam and (Callorhinus ursinus). We tested the hypotheses that both species Berta, 2002). Biting is considered to be the ancestral feeding use suction as their primary feeding mode, and that rapid jaw opening condition of basal aquatic vertebrates, as well as the terrestrial was related to suction generation. Steller sea lions used suction as ancestors of pinnipeds (Adam and Berta, 2002; Berta et al., 2006). their primary feeding mode, but also used a biting feeding mode. In Morphological evidence from Puijila, while not considered a contrast, northern fur seals only used a biting feeding mode. direct ancestor to pinnipeds (Kelley and Pyenson, 2015), suggests Kinematic profiles of Steller sea lions were all indicative of suction that the ancestral biting mode was still in use as mammals feeding (i.e. -
Early Evolution of Sexual Dimorphism and Polygyny in Pinnipedia
[The final published version of this article is available online. Please check the final publication record for the latest revisions of this article: Cullen, T. M., Fraser, D., Rybczynski, N. and Schröder-Adams, C. (2014), Early evolution of sexual dimorphism and polygyny in Pinnipedia. Evolution, 68: 1469–1484. doi:10.1111/evo.12360] Early evolution of sexual dimorphism and polygyny in Pinnipedia Thomas M. Cullen1,*, Danielle Fraser2, Natalia Rybczynski3, Claudia Schröder-Adams1 1Department of Earth Sciences, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada 2Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada 3Palaeobiology, Canadian Museum of Nature, PO Box 3443 Stn ‘D’, Ottawa, Ontario K1P 6P4, Canada Key Words: Fossil; Mating Systems; Coevolution, Miocene; Phocidae; Otariidae; Reproductive Strategies Total words (not including figure captions, literature cited): 6977 Tables: 0. Figures: 8 All data included as supplementary information T. M. Cullen et al. !1 * Correspondence and requests for materials should be addressed to T.M.C. (current address: [email protected], Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, Ontario M5S 3B2, Canada). Running Header: Cullen et al. — Evolution of sexual dimorphism in pinnipeds Abstract Sexual selection is one of the earliest areas of interest in evolutionary biology. And yet, the evolutionary history of sexually dimorphic traits remains poorly characterized for most vertebrate lineages. Here we report on evidence for the early evolution of dimorphism within a model mammal group, the pinnipeds. Pinnipeds show a range of sexual dimorphism and mating systems that span the extremes of modern mammals, from monomorphic taxa with isolated and dispersed mating to extreme size dimorphism with highly ordered polygynous harem systems.