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Sirenian Feeding Apparatus: Functional Morphology of Feeding Involving Perioral Bristles and Associated Structures
THE SIRENIAN FEEDING APPARATUS: FUNCTIONAL MORPHOLOGY OF FEEDING INVOLVING PERIORAL BRISTLES AND ASSOCIATED STRUCTURES By CHRISTOPHER DOUGLAS MARSHALL A DISSERTATION PRESENTED TO THE GRADUATE SCHOOL OF THE UNrVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REOUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY UNIVERSITY OF FLORIDA 1997 DEDICATION to us simply as I dedicate this work to the memory of J. Rooker (known "Rooker") and to sirenian conservation. Rooker was a subject involved in the study during the 1993 sampling year at Lowry Park Zoological Gardens. Rooker died during the red tide event in May of 1996; approximately 140 other manatees also died. During his rehabilitation at Lowry Park Zoo, Rooker provided much information regarding the mechanism of manatee feeding and use of the perioral bristles. The "mortality incident" involving the red tide event in southwest Florida during the summer of 1996 should serve as a reminder that the Florida manatee population and the status of all sirenians is precarious. Although some estimates suggest that the Florida manatee population may be stable, annual mortality numbers as well as habitat degradation continue to increase. Sirenian conservation and research efforts must continue. ii ACKNOWLEDGMENTS Research involving Florida manatees required that I work with several different government agencies and private parks. The staff of the Sirenia Project, U.S. Geological Service, Biological Resources Division - Florida Caribbean Science Center has been most helpful in conducting the behavioral aspect of this research and allowed this work to occur under their permit (U.S. Fish and Wildlife Permit number PRT-791721). Numerous conversations regarding manatee biology with Dr. -
Diets of Howler Monkeys
Chapter 2 Diets of Howler Monkeys Pedro Américo D. Dias and Ariadna Rangel-Negrín Abstract Based on a bibliographical review, we examined the diets of howler mon- keys to compile a comprehensive overview of their food resources and document dietary diversity. Additionally, we analyzed the effects of rainfall, group size, and forest size on dietary variation. Howlers eat nearly all available plant parts in their habitats. Time dedicated to the consumption of different food types varies among species and populations, such that feeding behavior can range from high folivory to high frugivory. Overall, howlers were found to use at least 1,165 plant species, belonging to 479 genera and 111 families as food sources. Similarity in the use of plant taxa as food sources (assessed with the Jaccard index) is higher within than between howler species, although variation in similarity is higher within species. Rainfall patterns, group size, and forest size affect several dimensions of the dietary habits of howlers, such that, for instance, the degree of frugivory increases with increased rainfall and habitat size, but decreases with increasing group size in groups that live in more productive habitats. Moreover, the range of variation in dietary habits correlates positively with variation in rainfall, suggesting that some howler species are habitat generalists and have more variable diets, whereas others are habi- tat specialists and tend to concentrate their diets on certain plant parts. Our results highlight the high degree of dietary fl exibility demonstrated by the genus Alouatta and provide new insights for future research on howler foraging strategies. Resumen Con base en una revisión bibliográfi ca, examinamos las dietas de los monos aulladores para describir exhaustivamente sus recursos alimenticios y la diversidad de su dieta. -
A Note on the Climbing Abilities of Giant Anteaters, Myrmecophaga Tridactyla (Xenarthra, Myrmecophagidae)
BOL MUS BIOL MELLO LEITÃO (N SÉR) 15:41-46 JUNHO DE 2003 41 A note on the climbing abilities of giant anteaters, Myrmecophaga tridactyla (Xenarthra, Myrmecophagidae) Robert J Young1*, Carlyle M Coelho2 and Dalía R Wieloch2 ABSTRACT: In this note we provide seven observations of climbing behaviour by giant anteaters Five observations were recorded in the field: three of giant anteaters climbing on top of 15 to 20 metre high termite mounds, and two observations of giant anteaters in trees In these cases the animals were apparently trying to obtain food The other two observations are from captivity, one involves a juvenile animal that several times over a three month period climbed in a tree to the height of around 20 metres The final observation, involves an adult female that after being separated from her mother climbed on two occasions over a wall with a fence on top (total height 2 metres) to be reunited with her mother It therefore seems that, despite the fact only one other record of climbing behaviour by giant anteaters exists in the scientific literature that giant anteaters have the ability to climb It also may be the case that young adults are highly motivated to stay with their mothers Key words: giant anteater, Myrmecophaga tridactyla, climbing behaviour, wild, zoos RESUMO: Nota sobre as habilidades trepadoras do tamanduá-bandeira, Myrmecophaga tridactyla (Xenarthra, Myrmecophagidae) Nesta nota apresentamos sete registros de comportamento de subir expressado por tamanduá-bandeira Temos cinco exemplos da natureza: três de tamanduás- -
The Giant Sea Mammal That Went Extinct in Less Than Three Decades
The Giant Sea Mammal That Went Extinct in Less Than Three Decades The quick disappearance of the 30-foot animal helped to usher in the modern science of human-caused extinctions. JACOB MIKANOWSKI, THE ATLANTIC 4/19/17 HTTPS://WWW.THEATLANTIC.COM/SCIENCE/ARCHIVE/2017/04/PLEIST OSEACOW/522831/ The Pleistocene, the geologic era immediately preceding our own, was an age of giants. North America was home to mastodons and saber-tooth cats; mammoths and wooly rhinos roamed Eurasia; giant lizards and bear-sized wombats strode across the Australian outback. Most of these giants died at the by the end of the last Ice Age, some 14,000 years ago. Whether this wave of extinctions was caused by climate change, overhunting by humans, or some combination of both remains a subject of intense debate among scientists. Complicating the picture, though, is the fact that a few Pleistocene giants survived the Quaternary extinction event and nearly made it intact to the present. Most of these survivor species found refuge on islands. Giant sloths were still living on Cuba 6,000 years ago, long after their relatives on the mainland had died out. The last wooly mammoths died out just 4,000 years ago. They lived in a small herd on Wrangel Island north of the Bering Strait between the Chukchi and East Siberian Seas. Two-thousand years ago, gorilla-sized lemurs were still living on Madagascar. A thousand years ago, 12-foot-tall moa birds were still foraging in the forests of New Zealand. Unlike the other long-lived megafauna, Steller’s sea cows, one of the last of the Pleistocene survivors to die out, found their refuge in a remote scrape of the ocean instead of on land. -
Ecology of Guatemalan Howler Monkeys (Alouatta Pigra Lawrence)
University of Montana ScholarWorks at University of Montana Graduate Student Theses, Dissertations, & Professional Papers Graduate School 1980 Ecology of Guatemalan howler monkeys (Alouatta pigra Lawrence) Janene M. Caywood The University of Montana Follow this and additional works at: https://scholarworks.umt.edu/etd Let us know how access to this document benefits ou.y Recommended Citation Caywood, Janene M., "Ecology of Guatemalan howler monkeys (Alouatta pigra Lawrence)" (1980). Graduate Student Theses, Dissertations, & Professional Papers. 7254. https://scholarworks.umt.edu/etd/7254 This Thesis is brought to you for free and open access by the Graduate School at ScholarWorks at University of Montana. It has been accepted for inclusion in Graduate Student Theses, Dissertations, & Professional Papers by an authorized administrator of ScholarWorks at University of Montana. For more information, please contact [email protected]. COPYRIGHT ACT OF 1976 Th is is an unpublished manuscript in which copyright sub s is t s . Any further r e p r in t in g of it s contents must be approved BY THE AUTHOR. MANSFIELD L ibrary Un iv e r s it y of Montana Da t e : 1 9 g 0 Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. ECOLOGY OF GUATEMALAN HOWLER MONKEYS (AToutta piqra Lawrence) by Janene M. Caywood B.S., Oregon State University, 1976 Presented in partial fu lfillm e n t of the requirements for the degree of Master of Arts UNIVERSITY OF MONTANA 1980 Approved by: Chairman, Board of E^amfners Dean, Graduate SchTTol a Date Reproduced with permission of the copyright owner. -
Scientists Astonished to Find Six New Species of Silky Anteater Hiding in Pl
Scientists astonished to find six new species of silky anteater hiding in pl... https://www.haaretz.com/science-and-health/MAGAZINE-scientists-find... Israel News All Germany - Israel Lebanon war Iran Gaza plan State of the Union Poland - Holocaust Log in One of the seven silky anteater species drowsing in a tree, which is where it spends its life when not actually dining on ants Credit: Pedro Da Costa Silva, Karina Molina and Alexandre Martins By Ruth Schuster | Dec 15, 2017 Share Tweet 0 Zen Subscribe ● ● ● 1 de 5 31/01/2018 18:09 Scientists astonished to find six new species of silky anteater hiding in pl... https://www.haaretz.com/science-and-health/MAGAZINE-scientists-find... Israel News All Germany - Israel Lebanon war Iran Gaza plan State of the Union Poland - Holocaust Log in Scientists had thought that the silky anteater was a single species. Now having actually looked at the tiny animals, who spend most of their lives asleep in trees in remote parts of Central and South America, they realize there are seven species. At least. Following a decade of expeditions and analysis, a Brazilian team reports on the validation of three previously suspected silky anteater species and the addition of three more in the Zoological Journal of the Linnean Society. Altogether with the originally known one, that makes seven silky anteaters. There could be dozens of species of silky anteaters – who knows. Not a lot of zoologists live in rain forest treetops and these things are strictly nocturnal, and small. Not that the animals, also called pygmy anteaters, are easy to see in broad sunlight. -
Edentatathe Newsletter of the IUCN Edentate Specialist Group • December 2003 • Number 5
ISSN 1413-4411 EdentataThe Newsletter of the IUCN Edentate Specialist Group • December 2003 • Number 5 Editors: Gustavo A. B. da Fonseca and Anthony B. Rylands Assistant Editors: John M. Aguiar and Jennifer Pervola ESG Chair: Gustavo A. B. da Fonseca Edentata e Newsletter of the IUCN/SSC Edentate Specialist Group Center for Applied Biodiversity Science Conservation International 1919 M St. NW, Suite 600, Washington, DC 20036, USA ISSN 1413-4411 Editors Gustavo A. B. da Fonseca, Center for Applied Biodiversity Science, Conservation International, Washington, DC Anthony B. Rylands, Center for Applied Biodiversity Science, Conservation International, Washington, DC Assistant Editors John M. Aguiar, Center for Applied Biodiversity Science, Conservation International, Washington, DC Jennifer Pervola, formerly with the Center for Applied Biodiversity Science, Conservation International, Washington, DC Edentate Specialist Group Chairman Gustavo A. B. da Fonseca Design Ted Goodridge, Conservation International, Global Communications, Washington, DC Layout Kim Meek, Center for Applied Biodiversity Science, Conservation International, Washington, DC Front Cover Photo: Southern Tamandua (Tamandua tetradactyla). Photo ©Haroldo Castro, Conservation International Editorial Assistance Mariella Superina, University of New Orleans, Department of Biological Sciences, New Orleans, LA Please direct all submissions and other editorial correspondence to John M. Aguiar, Center for Applied Biodiversity Science, Conservation International, 1919 M St. NW, Suite 600, Washington, DC 20036, USA, Tel. (202) 912-1000, Fax: (202) 912-0772, e-mail: <[email protected]>. is issue of Edentata was kindly sponsored by the Center for Applied Biodiversity Science, Conservation International, 1919 M St. NW, Suite 600, Washington, DC 20036, USA. Humboldt, Universität zu Berlin (ZMB). São ARTICLES analisadas evidências históricas sobre a origem do material utilizado na descrição original da espécie, com a proposta da restrição de sua localidade tipo. -
Atypicat Molecular Evolution of Afrotherian and Xenarthran B-Globin
Atypicat molecular evolution of afrotherian and xenarthran B-globin cluster genes with insights into the B-globin cluster gene organization of stem eutherians. By ANGELA M. SLOAN A thesis submitted to the Faculty of Graduate Studies in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Department of Zoology University of Manitoba Winnipeg, Manitoba, Canada @ Angela M. Sloan, July 2005 TIIE I]MVERSITY OF' MANITOBA FACULTY OF GRADUATE STT]DIES ***** - COPYRIGHTPERMISSION ] . Atypical molecular evolution of afrotherian and xenarthran fslobin cluster genes with insights into thefglobin cluster gene organization òf stem eutherians. BY Angela M. Sloan A ThesislPracticum submitted to the Faculty of Graduate Studies of The University of Manitoba in partial fulfill¡nent of the requirement of the degree of Master of Science Angela M. Sloan @ 2005 Permission has been granted to the Library of the University of Manitoba to lend or sell copies of this thesis/practicum, to the National Library of Canada to microfilm this thesis and to lend or sell copies of the fiIm, and to University Microfïlms Inc. to publish an abstract of this thesis/practicum. This reproduction or copy of this thesis has been made available by authority of the copyright owner solely for the purpose of private study and research, and may only be reproduced and copied as permitted by copyright laws or with express written authorization from the copyright ownér. ABSTRACT Our understanding of p-globin gene cluster evolutionlwithin eutherian mammals .is based solely upon data collected from species in the two most derived eutherian superorders, Laurasiatheria and Euarchontoglires. Ifence, nothing is known regarding_the gene composition and evolution of this cluster within afrotherian (elephants, sea cows, hyraxes, aardvarks, elephant shrews, tenrecs and golden moles) and xenarthran (sloths, anteaters and armadillos) mammals. -
Marine Mammals from the Miocene of Panama
Journal of South American Earth Sciences 30 (2010) 167e175 Contents lists available at ScienceDirect Journal of South American Earth Sciences journal homepage: www.elsevier.com/locate/jsames Marine mammals from the Miocene of Panama Mark D. Uhen a,*, Anthony G. Coates b, Carlos A. Jaramillo b, Camilo Montes b, Catalina Pimiento b,c, Aldo Rincon b, Nikki Strong b, Jorge Velez-Juarbe d a George Mason University, Fairfax, VA 22030, USA b Smithsonian Tropical Research Institute, Box 0843-03092, Balboa, Ancon, Panama c Department of Biology, University of Florida, Gainesville, FL, USA d Laboratory of Evolutionary Biology, Department of Anatomy, Howard University, WA 20059, USA article info abstract Article history: Panama has produced an abundance of Neogene marine fossils both invertebrate (mollusks, corals, Received 1 May 2009 microfossils etc.) and vertebrate (fish, land mammals etc.), but marine mammals have not been previ- Accepted 21 August 2010 ously reported. Here we describe a cetacean thoracic vertebra from the late Miocene Tobabe Formation, a partial cetacean rib from the late Miocene Gatun Formation, and a sirenian caudal vertebra and rib Keywords: fragments from the early Miocene Culebra Formation. These finds suggest that Central America may yet Panama provide additional fossil marine mammal specimens that will help us to understand the evolution, and Neogene particularly the biogeography of these groups. Miocene Ó Pliocene 2010 Elsevier Ltd. All rights reserved. Cetacea Sirenia 1. Introduction archipelago, Panama (Fig. 1A). The Tobabe Formation is the basal unit of the Late Miocene-Early Pliocene (w7.2ew3.5 Ma) Bocas del Central America includes an abundance of marine sedimentary Toro Group, an approximately 600 m thick succession of volcani- rock units that have produced many fossil marine invertebrates clastic marine sediments (Fig. -
IUCN SSC Anteater, Sloth and Armadillo Specialist Group
IUCN SSC Anteater, Sloth and Armadillo Specialist Group 2019 Report Mariella Superina Chair Mission statement Plan Mariella Superina (1) The mission of the IUCN SSC Anteater, Sloth and Planning: plan for protection of Brazilian Three- Armadillo Specialist Group is to promote the banded Armadillo and Pygmy Three-toed Sloth. Red List Authority Coordinator long-term conservation of the extant species of Act Agustín M. Abba (2) xenarthrans (anteaters, sloths and armadillos) Conservation actions: effective protection of and their habitats. Brazilian Three-banded Armadillo and Pygmy Location/Affiliation Three-toed Sloth. (1) IMBECU - CCT CONICET Mendoza, Mendoza, Projected impact for the 2017-2020 Network quadrennium Argentina Capacity building: (1) teach five training courses; (2) CEPAVE, La Plata, Argentina By the end of 2020, we envision the Anteater, (2) train Argentinean mammalogists in Red List Sloth and Armadillo Specialist Group (ASASG) assessments. Number of members will have achieved increased protection for Proposal development and funding: secure 26 our priority species, the Critically Endangered funding to replenish the Xenarthra Conserva- Pygmy Three-toed Sloth (Bradypus pygmaeus) tion Fund. Social networks and the Vulnerable Brazilian Three-banded Synergy: enter into partnership with zoological Armadillo (Tolypeutes tricinctus). We aim to Facebook: institutions. IUCN/SSC Anteater, Sloth and Armadillo reach this goal by increasing scientific knowl- Communicate Specialist Group edge, raising awareness, developing and imple- Communication: (1) publish four issues of the Website: www.xenarthrans.org menting comprehensive action plans and securing protection of their habitat. Capacity ASASG Newsletter; (2) increase awareness building through training courses will allow us to through campaigns at zoos and other institu- increase the number of researchers dedicated tions; (3) increase awareness for Xenarthra. -
The Effects of Habitat Disturbance on the Populations of Geoffroy's Spider Monkeys in the Yucatan Peninsula
The Effects of Habitat Disturbance on the Populations of Geoffroy’s Spider Monkeys in the Yucatan Peninsula PhD thesis Denise Spaan Supervisor: Filippo Aureli Co-supervisor: Gabriel Ramos-Fernández August 2017 Instituto de Neuroetología Universidad Veracruzana 1 For the spider monkeys of the Yucatan Peninsula, and all those dedicated to their conservation. 2 Acknowledgements This thesis turned into the biggest project I have ever attempted and it could not have been completed without the invaluable help and support of countless people and organizations. A huge thank you goes out to my supervisors Drs. Filippo Aureli and Gabriel Ramos- Fernández. Thank you for your guidance, friendship and encouragement, I have learnt so much and truly enjoyed this experience. This thesis would not have been possible without you and I am extremely proud of the results. Additionally, I would like to thank Filippo Aureli for all his help in organizing the logistics of field work. Your constant help and dedication to this project has been inspiring, and kept me pushing forward even when it was not always easy to do so, so thank you very much. I would like to thank Dr. Martha Bonilla for offering me an amazing estancia at the INECOL. Your kind words have encouraged and inspired me throughout the past three years, and have especially helped me to get through the last few months. Thank you! A big thank you to Drs. Colleen Schaffner and Jorge Morales Mavil for all your feedback and ideas over the past three years. Colleen, thank you for helping me to feel at home in Mexico and for all your support! I very much look forward to continue working with all of you in the future! I would like to thank the CONACYT for my PhD scholarship and the Instituto de Neuroetología for logistical, administrative and financial support. -
Palaeoproteomics Resolves Sloth Relationships
ARTICLES https://doi.org/10.1038/s41559-019-0909-z Palaeoproteomics resolves sloth relationships Samantha Presslee1,2,3,24, Graham J. Slater4,24, François Pujos5, Analía M. Forasiepi5, Roman Fischer 6, Kelly Molloy7, Meaghan Mackie3,8, Jesper V. Olsen 8, Alejandro Kramarz9, Matías Taglioretti10, Fernando Scaglia10, Maximiliano Lezcano11, José Luis Lanata 11, John Southon12, Robert Feranec13, Jonathan Bloch14, Adam Hajduk15, Fabiana M. Martin16, Rodolfo Salas Gismondi 17, Marcelo Reguero18, Christian de Muizon19, Alex Greenwood20,21, Brian T. Chait 7, Kirsty Penkman22, Matthew Collins3,23 and Ross D. E. MacPhee2* The living tree sloths Choloepus and Bradypus are the only remaining members of Folivora, a major xenarthran radiation that occupied a wide range of habitats in many parts of the western hemisphere during the Cenozoic, including both continents and the West Indies. Ancient DNA evidence has played only a minor role in folivoran systematics, as most sloths lived in places not conducive to genomic preservation. Here we utilize collagen sequence information, both separately and in combination with published mitochondrial DNA evidence, to assess the relationships of tree sloths and their extinct relatives. Results from phylo- genetic analysis of these datasets differ substantially from morphology-based concepts: Choloepus groups with Mylodontidae, not Megalonychidae; Bradypus and Megalonyx pair together as megatherioids, while monophyletic Antillean sloths may be sister to all other folivorans. Divergence estimates are consistent with fossil evidence for mid-Cenozoic presence of sloths in the West Indies and an early Miocene radiation in South America. he sloths (Xenarthra, Folivora), nowadays a taxonomically consensus8–10,16,17 in morphology-based phylogenetic treatments is narrow (six species in two genera) component of the fauna of to place the three-toed sloth as sister to all other folivorans (Fig.