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Annual Mass Drownings of the Serengeti Wildebeest Migration Influence Nutrient Cycling and Storage in the Mara River
Annual mass drownings of the Serengeti wildebeest migration influence nutrient cycling and storage in the Mara River Amanda L. Subaluskya,b,1, Christopher L. Duttona,b, Emma J. Rosib, and David M. Posta aDepartment of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06511; and bCary Institute of Ecosystem Studies, Millbrook, NY 12545 Edited by James A. Estes, University of California, Santa Cruz, CA, and approved May 16, 2017 (received for review September 8, 2016) The annual migration of ∼1.2 million wildebeest (Connochaetes taur- hundreds to thousands of bison drowning in rivers of the western inus) through the Serengeti Mara Ecosystem is the largest remaining United States in the late 18th and early 19th centuries when overland migration in the world. One of the most iconic portions of large bison herds were still intact (16, 17). River basins that no their migration is crossing of the Mara River, during which thousands longer contain terrestrial migrations may have lost the annual drown annually. These mass drownings have been noted, but their input of resources from mass drownings, which may fundamen- frequency, size, and impact on aquatic ecosystems have not been tally alter how those river ecosystems function now compared quantified. Here, we estimate the frequency and size of mass drown- with the past. The more well-studied annual migrations of ings in the Mara River and model the fate of carcass nutrients through anadromous fishes and subsequent carcass inputs have been > the river ecosystem. Mass drownings ( 100 individuals) occurred in at shown to be important in rivers (18, 19), but equivalent exami- least 13 of the past 15 y; on average, 6,250 carcasses and 1,100 tons of nation of the influence of terrestrial migrations is lacking. -
Gaits and Their Development in the Infraorder Pecora by Anne Innis
Gaits and Their Development in the Infraorder Pecora by Anne Innis Dagg, M.A. THESIS Presented to the Faculty of Graduate Studies of the University of Waterloo in partial ful fillmenc of the requirements for the degree of Doctor of Philosopty in Biolog The University of Waterloo February, 1967 The University of Waterloo requires the signature of all persons using this thesis. Please sign below, and give address and date. I hereby declare that I am the sole a�thor of this thesis. I authorize the University of Waterloo to lend it to other institutions or individuals for the purpose of scholarly research. Signature Abstract The gaits of twenty-eight species of the Infraorder Pecora are analyzed from motion picture sequences comprising over 45,000 frames. For each gait the percentage time spent on the various supporting legs during each stride and the order in which the combinations of supporting legs were used are tabulated. When possible the times for the strides are calculated. The walk patterns of each of the four families studied are shown to be statistically distinctive. Within each family, those members that live where the vegetation is so dense that they must rely on hearing to warn them of danger use a more stable walk than those species that inhabit open grasslands. A stable walk is that in which diagonal legs are used in·preference to lateral legs and three or four supporting legs are used rather than two. With a more stable walk, 4 species is able to pause quickly and to flee instantly if danger thr�atens. -
Human Pressure Threaten Swayne's Hartebeest to Point of Local
Research Article Volume 8:1,2020 Journal of Biodiversity and Endangered DOI: 10.24105/2332-2543.2020.8.239 Species ISSN: 2332-2543 Open Access Human Pressure Threaten Swayne’s Hartebeest to Point of Local Extinction from the Savannah Plains of Nech Sar National Park, South Rift Valley, Ethiopia Simon Shibru1*, Karen Vancampenhout2, Jozef Deckers2 and Herwig Leirs3 1Department of Biology, Arba Minch University, Arba Minch, Ethiopia 2Department of Earth and Environmental Sciences, Katholieke Universiteit Leuven, Celestijnenlaan 200E, B-3001 Leuven, Belgium 3Department of Biology, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium Abstract We investigated the population size of the endemic and endangered Swayne’s Hartebeest (Alcelaphus buselaphus swaynei) in Nech Sar National Park from 2012 to 2014 and document the major threats why the species is on the verge of local extinction. The park was once known for its abundant density of Swayne’s Hartebeest. We used direct total count methods for the census. We administered semi-structured interviews and open-ended questionnaires with senior scouts who are a member of the local communities. Historical records were obtained to evaluate the population trends of the animals since 1974. The density of the animal decreased from 65 in 1974 to 1 individual per 100 km2 in 2014 with a decline of 98.5% in the past 40 years. The respondents agreed that the conservation status of the park was in its worst condition ever now with only 2 Swayne’s Hartebeest left, with a rapid decline from 4 individuals in 2012 and 12 individuals in 2009. Mainly hunting and habitat loss, but also unsuitable season of reproduction and shortage of forage as minor factors were identified as threats for the local extinction of the Swayne’s Hartebeests. -
Whole-Genome Sequencing of Wild Siberian Musk
Yi et al. BMC Genomics (2020) 21:108 https://doi.org/10.1186/s12864-020-6495-2 RESEARCH ARTICLE Open Access Whole-genome sequencing of wild Siberian musk deer (Moschus moschiferus) provides insights into its genetic features Li Yi1†, Menggen Dalai2*†, Rina Su1†, Weili Lin3, Myagmarsuren Erdenedalai4, Batkhuu Luvsantseren4, Chimedragchaa Chimedtseren4*, Zhen Wang3* and Surong Hasi1* Abstract Background: Siberian musk deer, one of the seven species, is distributed in coniferous forests of Asia. Worldwide, the population size of Siberian musk deer is threatened by severe illegal poaching for commercially valuable musk and meat, habitat losses, and forest fire. At present, this species is categorized as Vulnerable on the IUCN Red List. However, the genetic information of Siberian musk deer is largely unexplored. Results: Here, we produced 3.10 Gb draft assembly of wild Siberian musk deer with a contig N50 of 29,145 bp and a scaffold N50 of 7,955,248 bp. We annotated 19,363 protein-coding genes and estimated 44.44% of the genome to be repetitive. Our phylogenetic analysis reveals that wild Siberian musk deer is closer to Bovidae than to Cervidae. Comparative analyses showed that the genetic features of Siberian musk deer adapted in cold and high-altitude environments. We sequenced two additional genomes of Siberian musk deer constructed demographic history indicated that changes in effective population size corresponded with recent glacial epochs. Finally, we identified several candidate genes that may play a role in the musk secretion based on transcriptome analysis. Conclusions: Here, we present a high-quality draft genome of wild Siberian musk deer, which will provide a valuable genetic resource for further investigations of this economically important musk deer. -
The Hippopotamus 4
lesson The Hippopotamus 4 Before You Read Look at the picture. Read the sentences. Check (✔) True, False, or Don’t Know. True False Don’t Know 1. The hippopotamus is big. 2. It lives in the snow and ice. 3. It has wings and a tail. 15 Lesson 4: The Hippopotamus 4 The Hippopotamus The hippopotamus, or hippo, lives in the hot part of Africa. It is a mammal. That is, its babies are born alive, and they drink milk from the mother’s body. The hippopotamus is a large animal. It weighs four big tons. Its stomach is seven meters long, and it eats only plants. It is a mammal, but it spends a lot of time in the water. During the day, it sleeps beside a river or a lake. at the side of Sometimes it wakes up. Then it goes under the water to get some plants for food. It can close its nose and stay under water for ten minutes. Its ears, eyes, and nose are high up on its head. It can stay with its body under the water and only its ears, eyes, and nose above the water. over Then it can breathe the air. At night, the hippo walks on the land and looks for food. It never goes very far from the water. A baby hippo often stands on its mother’s back. The mother looks for food underwater. The baby rides on her back above the water. 16 Unit 1: Animals a Vocabulary Put the right word in each blank. The sentences are from the text. -
The Effect of Species Associations on the Diversity and Coexistence of African Ungulates
The effect of species associations on the diversity and coexistence of African ungulates. By Nancy Barker For Professor Kolasa BIO306H1 – Tropical Ecology University of Toronto Wednesday, August 24th, 2005 Abstract: The effects of species associations on species diversity and coexistence were investigated in East Africa. The frequency and group sizes of African ungulates were observed and analyzed to determine for differences in species associations based on their density and distribution, as well as their associations with other species. Associations between species were determined to be nonrandom and seen to affect the demographics of associating herds. Such associations mirrored in other studies were shown to be the result of interspecific competition, habitat preferences and predation pressure which increases the potential for coexistence between species. This suggests a potentially important role in the regulation of species diversity by ecological dynamics in species rich communities. In the face of today’s biodiversity crisis, such understanding of species associations and how they are regulated may have huge implications for conservation. Introduction: known with the famous Darwin’s finches of the Galapagos Islands. However, there are many other Sympatric coexistence of organisms within a guilds with what seems to be extensive community poses several questions for ecologists. overlapping in their resources, such as the grazing High levels of species association occur with high herds in Africa which eat common and widely species packing, as is seen within the Selous game dispersed foods. Sinclair (Sinclair, 1979 as cited in reserve of Tanzania in east Africa. Sinclair (1985) Sinclair, 1985) has found that this seemingly notes that mixed herds are frequently seen in east extensive overlap among these herds have also Africa and Connor and Simberloff (1979) have undergone niche separation. -
The Phylogeny and Taxonomy of Hippopotamidae (Mammalia: Artiodactyla): a Review Based on Morphology and Cladistic Analysis
Blackwell Science, LtdOxford, UKZOJZoological Journal of the Linnean Society0024-4082The Lin- nean Society of London, 2005? 2005 143? 126 Original Article J.-R. BOISSERIEHIPPOPOTAMIDAE PHYLOGENY AND TAXONOMY Zoological Journal of the Linnean Society, 2005, 143, 1–26. With 11 figures The phylogeny and taxonomy of Hippopotamidae (Mammalia: Artiodactyla): a review based on morphology and cladistic analysis JEAN-RENAUD BOISSERIE1,2* 1Laboratoire de Géobiologie, Biochronologie et Paléontologie Humaine, UMR CNRS 6046, Université de Poitiers, 40 avenue du Recteur, Pineau 86022 Cedex, France 2Laboratory for Human Evolutionary Studies, Department of Integrative Biology, Museum of Vertebrate Zoology, University of California at Berkeley, 3101 Valley Life Science Building, Berkeley, CA 94720-3160, USA Received August 2003; accepted for publication June 2004 The phylogeny and taxonomy of the whole family Hippopotamidae is in need of reconsideration, the present confu- sion obstructing palaeoecology and palaeobiogeography studies of these Neogene mammals. The revision of the Hip- popotamidae initiated here deals with the last 8 Myr of African and Asian species. The first thorough cladistic analysis of the family is presented here. The outcome of this analysis, including 37 morphological characters coded for 15 extant and fossil taxa, as well as non-coded features of mandibular morphology, was used to reconstruct broad outlines of hippo phylogeny. Distinct lineages within the paraphyletic genus Hexaprotodon are recognized and char- acterized. In order to harmonize taxonomy and phylogeny, two new genera are created. The genus name Choeropsis is re-validated for the extant Liberian hippo. The nomen Hexaprotodon is restricted to the fossil lineage mostly known in Asia, but also including at least one African species. -
Habitat Preference and Activity Pattern of the Pygmy Hippopotamus Analyzed by Camera Trapping and GIS
Habitat preference and activity pattern of the pygmy hippopotamus analyzed by camera trapping and GIS Student: Henk Eshuis (Msc Forest and Nature Conservation, Wageningen University) Supervisors: Dr. P. van Hooft (Resource Ecology Group, Wageningen University) Assoc Prof. M.C.J. Paris (Institute for Breeding Rare and Endangered African Mammals; IBREAM (www.ibream.org) For further enquiries contact [email protected]) Habitat preference and activity pattern of the pygmy hippopotamus analyzed by camera trapping and GIS Submitted: 03-11-2011 REG-80439 Student: Henk Eshuis (Msc Forest and Nature Conservation, Wageningen University) 850406229010 Supervisors: Dr. P. van Hooft (Resource Ecology Group, Wageningen University) Assoc prof. M.C.J. Paris (Institute for Breeding Rare and Endangered African Mammals; IBREAM, www.ibream.org) Abstract The pygmy hippopotamus (Choeropsis liberiensis) is an elusive and endangered species that only occurs in West Africa. Not much is known about the habitat preference and activity pattern of this species. We performed a camera trapping study and collected locations of pygmy hippo tracks in Taï National Park, Ivory Coast, to determine this more in detail. In total 1785 trap nights were performed with thirteen recordings of pygmy hippo on ten locations. In total 159 signs of pygmy hippo were found. We analyzed the habitat preferences with a normalized difference vegetation index (NDVI) from satellite images, distance to rivers and clustering using GIS. The NDVI indicates that pygmy hippos are mostly found in a wetter vegetation type. Most tracks we found in the first 250 m from a river and the tracks show significant clustering. These observations indicate that the pygmy hippopotamus prefers relatively wet vegetation close to rivers. -
Hippopotamus
TRANSBOUNDARY SPECIES PROJECT Background Study HIPPOPOTAMUS Rowan B. Martin The Transboundary Mammal Project of the Ministry of Environment and Tourism, Namibia facilitated by The Namibia Nature Foundation July 2005 Transboundary Species Project – Background Study Hippopotamus CONTENTS 1. BIOLOGICAL INFORMATION ...................................... 1 a. Taxonomy ..................................................... 1 b. Physical description .............................................. 3 c. Reproduction and Population Dynamics .............................. 5 d. Habitats ...................................................... 12 e. Numbers and Distribution ........................................ 16 (1) Africa ................................................... 16 (2) Southern Africa ........................................... 16 (3) Namibia ................................................. 21 f. Behaviour .................................................... 29 g. Limiting Factors ............................................... 31 2. SIGNIFICANCE OF THE SPECIES .................................. 33 a. Conservation Significance ........................................ 33 b. Economic Significance ........................................... 34 3. STAKEHOLDING ................................................. 36 a. Stakeholders .................................................. 36 b. Stakeholder Institutions – Present and Future ......................... 36 c. Towards Trans-Boundary Institutions ............................... 37 4. MANAGEMENT -
Functional Design of Cranial Muscles: Comparative and Physiological Studies in Pigs1
AMER. ZOOL., 20:283-293 (1980) Functional Design of Cranial Muscles: Comparative and Physiological Studies in Pigs1 SUSAN W. HERRING Department of Oral Anatomy, University of Illinois at the Medical Center, Chicago, Illinois 60680 Downloaded from https://academic.oup.com/icb/article-abstract/20/1/283/1992384 by UNICAMP user on 16 September 2018 SYNOPSIS. The adaptive significance and evolutionary history of the internal architecture of the masseter muscle in suid artiodactyls are investigated. Hypotheses are developed on the basis of anatomical and physiological studies in the pig, Sits scrofa, and used to make predictions about the expected anatomy in the giant forest hog, Hylochoerus meinertzhageni and the warthog, Phacochoerus aethiopicus. The hypotheses are then tested by anatomical examination of these animals. In the pig, pinnation of the masseter serves to increase masticatory force and to partition the muscle into three semi-independent parts: vertical anterior fibers, which are used especially to close from wide gape; a central pinnate por- tion, which is used for all activities; and horizontal fibers covering the jaw joint, which are used especially for anterior translation of the condyle. In the giant forest hog and warthog the structure of the masseter is more uniform and the physiological cross section is larger than in the pig. These changes are interpreted as correlates of decreased emphasis on gape and increased emphasis on masticatory force in the African suids. In order to clarify the evolutionary sequence, masseteric architecture in the suids is compared with that of tayassuids and the hippopotamus. INTRODUCTION length-tension curve, and nonsynchro- In mammalian anatomy, truly parallel- nous contraction of fibers, all of which fibered muscles exist mainly in textbooks. -
Lion Elephant Giraffe
African Animals African Animals Much of the continent of Africa is a savanna. A savanna is an open grassland with few trees. Africa's savanna is home to many different types of animals. The savanna is a habitat. A habitat is a place where an animal lives. Here are some animals that live in the African savanna. World Almanac for Kids Lion Lions are big cats. Lions are big cats with gold-colored fur. Lions are carnivores (KARneh-vawrz). Carnivores are meat eaters. Lions live together in a group called a pride. Elephant Elephants are animals with trunks and tusks. Elephants are herbivores (ER- beh-vawrz). Herbivores are plant eaters. Elephants live together in a group called a herd. Giraffe Giraffes are the tallest animals in the world. They are plant eaters. Their height helps them reach leaves on tall trees. Giraffes live in a herd of about ReadWorks.org Copyright © 2005 Weekly Reader Corporation. All rights reserved. Used by permission.Weekly Reader is a registered trademark of Weekly Reader Corporation. African Animals 10 animals. U.S. Fish and Wildlife Service Giraffes are the tallest animals in the world. Warthog Warthogs are a type of wild hog. Warthogs are omnivores (AHM-nehvawrz). Omnivores eat both plants and meat. Female and baby warthogs live in a small group called a sounder. Males live alone. Hippopotamus Hippopotamuses are animals that live partly on land and partly in water. They are herbivores that eat mainly grasses. Hippos live in a herd of up to 15 members. ReadWorks.org Copyright © 2005 Weekly Reader Corporation. -
AN AMERICAN FOSSIL GIRAFFE Giraffa Nebrascensis, Sp. Nov
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Bulletin of the University of Nebraska State Museum, University of Nebraska State Museum 1925 AN AMERICAN FOSSIL GIRAFFE irG affa nebrascensis, sp. nov. W. D. Matthew E. H. Barbour Follow this and additional works at: http://digitalcommons.unl.edu/museumbulletin Part of the Entomology Commons, Geology Commons, Geomorphology Commons, Other Ecology and Evolutionary Biology Commons, Paleobiology Commons, Paleontology Commons, and the Sedimentology Commons This Article is brought to you for free and open access by the Museum, University of Nebraska State at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Bulletin of the University of Nebraska State Museum by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. BULLETIN 4 VOLUME 1 APRIL 1925 THE NEBRASKA STATE MUSEUM ERWIN H. BARBOUR, Director AN AMERICAN FOSSIL GIRAFFE Giraffa nebrascensis, sp. nov. By W. D. MATTHEW E. H. BARBOUR A fragment of the lower jaw of a large fossil mammal with two well-worn teeth was dug up in June 1918, at a depth of 20 feet, while digging a cess pool at Bradshaw, York County, Nebraska. This unique specimen, accessioned 7-7-18, was brought to the Nebraska State Museum by A. Archie Dorsey, and was donated by C. B. Palmet, both of Bradshaw. It undoubtedly occurred in loess, which is thickly as well. as extensively de veloped in this region. It is a ruminant jaw, the teeth preserved being P4 and m 1 • The characteristic pattern of the premolar excludes refer ence to the Bovidae, and leaves the choice between the Gi raffidae, Pa~aeomerycidae, and certain large Cervidae.