Namibia & Okavango Panhandle (Botswana
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No Evidence for Proteolytic Venom Resistance in Southern African Ground Squirrels
1 No evidence for proteolytic venom resistance in southern African ground squirrels Molly A. Phillips, Jane M. Waterman, Pg Du Plessis, Martin Smit, and Nigel C. Bennett Abstract Many species that interact with venomous snakes show resistances to their venoms. The family Sciuridae has several North American members that harass venomous snakes and show proteolytic resistances in their sera. We examined sera collected from an African ground squirrel (Xerus inauris) against two sympatric venomous snakes (Bitis arietans and Naja annulifera) and found no support for proteolytic resistance. Our results add to our understanding of the risks in predator defense within the family Sciuridae. Keywords: Xerus inauris; Bitis arietans; Naja annulifera; Venom; Venom resistance; Predator-prey Animal venoms are a complex mixture of proteins and peptides that induce many destructive physiological effects for a variety of purposes, including prey capture (Fry et al., 2008; Jansa and Voss, 2011), digestion (Thomas and Pough, 1979), and defense (Kardong, 1982). The evolution of venom in snakes is thought to be a major factor leading to the radiation of over 2500 advanced snake species (Vidal, 2002). Some animals that interact with venomous snakes have physiological resistance to venom. As a predator, the Indian grey mongoose (Herpestes edwardsii) is resistant to the haemorrhagic effects caused by the venom of many snake species (Tomihara et al., 1990). California ground squirrels (Spermophilus (Otospermophilus) beecheyi) defend against snake predation by mobbing and have resistance against the proteolytic activity of the venom from northern Pacific rattlesnakes (Crotalus oreganus) (Biardi, 2000). The Cape ground squirrel (Xerus inauris) is a ground-dwelling sciurid that inhabits the arid regions of southern Africa (Skurski and Waterman, 2005). -
A Review of Bristly Ground Squirrels Xerini and a Generic Revision in the African Genus Xerus
Mammalia 2016; 80(5): 521–540 Boris Kryštufek*, Ahmad Mahmoudi, Alexey S. Tesakov, Jan Matějů and Rainer Hutterer A review of bristly ground squirrels Xerini and a generic revision in the African genus Xerus DOI 10.1515/mammalia-2015-0073 Received April 28, 2015; accepted October 13, 2015; previously Introduction published online December 12, 2015 Bristly ground squirrels from the arid regions of Central Abstract: Bristly ground squirrels Xerini are a small rodent Asia and Africa constitute a coherent monophyletic tribe tribe of six extant species. Despite a dense fossil record the Xerini sensu Moore (1959). The tribe contains six species group was never diverse. Our phylogenetic reconstruction, in three genera of which Atlantoxerus and Spermophilop based on the analysis of cytochrome b gene and including sis are monotypic. The genus Xerus in its present scope all known species of Xerini, confirms a deep divergence (Thorington and Hoffmann 2005), consists of four species between the African taxa and the Asiatic Spermophilopsis. in three subgenera: X. inauris and X. princeps (subgenus Genetic divergences among the African Xerini were of a Geosciurus), X. rutilus (subgenus Xerus), and X. eryth comparable magnitude to those among genera of Holarc- ropus (subgenus Euxerus). Recent phylogenetic recon- tic ground squirrels in the subtribe Spermophilina. Evi- struction based on molecular markers retrieved Xerus to dent disparity in criteria applied in delimitation of genera be paraphyletic with respect to Atlantoxerus (Fabre et al. in Sciuridae induced us to recognize two genera formerly 2012), therefore challenging the suitability of the generic incorporated into Xerus. The resurrected genera (Euxerus arrangement of the group. -
Distribution, Population Size, and Habitat Characteristics of The
sustainability Article Distribution, Population Size, and Habitat Characteristics of the Endangered European Ground Squirrel (Spermophilus citellus, Rodentia, Mammalia) in Its Southernmost Range Dimitra-Lida Rammou 1 , Dimitris Kavroudakis 2 and Dionisios Youlatos 1,* 1 Laboratory of Marine and Terrestrial Animal Diversity, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; [email protected] 2 Department of Geography, University of the Aegean, GR-81100 Mytilene, Greece; [email protected] * Correspondence: [email protected]; Tel.: +30-2310998734 Abstract: The European ground squirrel (Spermophilus citellus) is an endangered species, endemic to Central and Southeastern Europe, inhabiting burrow colonies in grassland and agricultural ecosystems. In recent years, agricultural land-use changes and increased urbanization have largely contributed to a severe population decline across its range, particularly in its southernmost edge. Assessing the population and habitat status of this species is essential for prioritizing appropriate conservation actions. The present study aims to track population size changes and identify habitat characteristics of the species in Greece via a literature search, questionnaires, and fieldwork for assessing trends in population size as well as spatial K-means analysis for estimating its relation to specific habitat attributes. We found that both distribution size (grid number) and colony numbers of Citation: Rammou, D.-L.; the species decreased in the last decades (by 62.4% and 74.6%, respectively). The remaining colonies Kavroudakis, D.; Youlatos, D. are isolated and characterized by low density (mean = 7.4 ± 8.6 ind/ha) and low number of animals Distribution, Population Size, and (mean = 13 ± 16 individuals). Most of the colonies are situated in lowlands and did not relate to Habitat Characteristics of the specific habitat attributes. -
Namibia & Botswana II 2018
Field Guides Tour Report Namibia & Botswana II 2018 Oct 30, 2018 to Nov 18, 2018 Joe Grosel For our tour description, itinerary, past triplists, dates, fees, and more, please VISIT OUR TOUR PAGE. Rosy-faced Lovebirds were some of the first birds we saw in Namibia. We had wonderful looks at these colorful and charming little parrots at several locations, including the Erongo Wilderness Lodge. Photo by guide Joe Grosel. Our November 2018 Namibia and Botswana tour followed the established 18-day itinerary which incorporates an extraordinary assemblage of contrasting habitats. These included the Namib Desert's magnificent red dunes, the coastal region around Walvis Bay with its cold but very prolific Benguela current, the towering granite inselbergs of the Spitzkoppe and Erongo hills, the 'Great White' Etosha Pan with its numerous strategic waterholes supporting large concentrations of game, the tranquillity of Botswana's papyrus-lined Okavango River and the beautiful wilderness of the Okavango Delta. After a relatively short flight from Johannesburg, the tour started in earnest in Namibia's capital, Windhoek. No birding tour would be complete without at least one visit to a sewage works, and so we kicked off this tour on a first afternoon at the Gammams water purification works, which provided some good water and 'bushveld' birds. South African Shelduck, Hottentot Teal, Red-billed Duck, Southern Pochard, Red-knobbed Coot, African Gallinule, Common and Wood sandpipers, Great Cormorant, and a lone African Jacana were just some of the aquatic species seen. In the surrounding Acacia woodland there were Gray Go-away-birds, Rufous-vented Warbler, Pied Barbet, Cardinal Woodpecker, Brubru, Burnt-neck Eremomela, Yellow Canary, Cape Sparrow, Mariqua Flycatcher, and Scarlet-chested and Mariqua sunbirds, while in the reed beds we spotted Southern Red Bishop, African Reed Warbler, and Lesser and Southern masked-weavers. -
Reproductive Delay in the Female Cape Ground Squirrel (Xerus Inauris)
University of Central Florida STARS Electronic Theses and Dissertations, 2004-2019 2006 Reproductive Delay In The Female Cape Ground Squirrel (xerus Inauris) Beth Pettitt University of Central Florida Part of the Biology Commons Find similar works at: https://stars.library.ucf.edu/etd University of Central Florida Libraries http://library.ucf.edu This Masters Thesis (Open Access) is brought to you for free and open access by STARS. It has been accepted for inclusion in Electronic Theses and Dissertations, 2004-2019 by an authorized administrator of STARS. For more information, please contact [email protected]. STARS Citation Pettitt, Beth, "Reproductive Delay In The Female Cape Ground Squirrel (xerus Inauris)" (2006). Electronic Theses and Dissertations, 2004-2019. 956. https://stars.library.ucf.edu/etd/956 REPRODUCTIVE DELAY IN FEMALE CAPE GROUND SQUIRRELS (Xerus inauris) by BETH A. PETTITT B.A. College of St. Benedict, 1995 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in the Department of Biology in the College of Sciences at the University of Central Florida Orlando, Florida Spring Term 2006 © 2006 Beth Pettitt ii ABSTRACT The Cape ground squirrel, Xerus inauris, is a highly social cooperative breeder that forms groups containing multiple breeding females. While the distribution of reproduction among group members is fairly even (i.e. exhibits low reproductive skew), previous studies of Cape ground squirrels suggest the reproductive development of sub-adult females is inhibited by the presence of adult breeding female group mates. As reproductive delay is known to be influenced by a number of different parameters, my goal was to determine if other factors affected the timing of sexual maturity, and if so, which factors are the most influential. -
Longevity Survey
LONGEVITY SURVEY LENGTH OF LIFE OF MAMMALS IN CAPTIVITY AT THE LONDON ZOO AND WHIPSNADE PARK The figures given in the following tables are based on the records of the Zoological Society of London for the years 1930 to 1960. The number of specimens in each sample is given in the first column. The percentage of the sample that died in less than a year at the zoo is iven in second column. In this way ‘delicate’ zoo species can be noted at a glance. An average fife span of all those individuals living for more than a year at the zoo is given (in months) in the third column. In the fourth column the maximum individual life-span is noted for each species. It must be emphasized that the age of specimens arriving at the zoo is seldom known accur- ately and no allowance has been made for this. All figures refer to the period of time between arrival at the zoo and death at the zoo. Actual life-spans will, therefore, usually be longer than those given. Number o % dead in Average age Ma.life individual less than (in nronths) span in sample 12 month of those (in months) livi 12 man% or longer ORDER MONOTREMATA Tachyglossus aculeatirs Echidna 7 I00 10 Zuglossus bruijni Druijns Echidna 2 - 368 ORDER MARSUPIALIA Caluromys philander Philander Opossum 3 - 50 Philander opossum Quica Opossum I - 1s Lutreolina crussicaudufa Thick-tailed Opossum 6 50 1s Metachirus nudicuudatirs Rat-tailed Opossum 14 71 27 Didelphis marsupialis Virginian Opossum 34 82 26 Didelphis azarae Azara’s Opossuni IS 53 48 Dmyurus uiuerrinus Little Native Cat 2 I00 I1 Dasyurus maculatus -
Kuzikus Species List
Nature – experience and explore, understand and conserve TOURISM ● EDUCATION ● RESEARCH ● CONSERVATION Visible Biodiversity of Kuzikus (Fauna & Flora) From Birds, reptiles, invertebrates and mammals to trees, shrubs, bulbs, creepers and grasses Kuzikus Wildlife Reserve, Gobabis Region, Namibia www.kuzikus-namibia.de Copyright by Kuzikus Wildlife Reserve not to be reprinted or published without permission - A humble foundation to develop a deeper understanding of the marvellous and spectacular ecological processes that can be admired on Kuzikus throughout day and night- © Kuzikus Wildlife Resreve, www.kuzikus-namibia.de 1 Nature – experience and explore, understand and conserve BIRDS (Bird Sightings by BRinK Conservationists: 2008 - 2010) Grey Heron Ardea cinerea (Bloureier) Cattle Egret Bubulcus ibis (Bosluisvoel) Little Egret Egretta garzetta (Kleinwitreier) Spur-Winged Goose Plectropterus gambensis (Wildermakou) Lappet-Faced Vulture Torgos tracheliotus (Swartaasvoel) Cape Vulture Gyps coprtheres (Kransaasvoel) African White-Backed Vulture Gyps africanus (Witrugaasvoel) Bateleur Terathopius ecaudatus (Berghaan) Brown-Snake Eagle Circaetus cinereus (Bruinslangarend) Black-Breasted Snake Eagle Circaetus gallicus (Swartborsslangarend) Steppe Eagle Aquila nipalensis (Steppe-arend) Tawny Eagle Aquila rapax (Roofarend) Wahlberg’s Eagle Aquila wahlbergi (Bruinarend) Martial Eagle Polemaetus bellicosus (Breekoparend) Booted Eagle Hieraaetus pennatus (Wergarend) Steppe Buzzard Buteo buteo (Bruinjakkalsvoel) Pale-Chanting Goshawk -
Within- and Between-Group Feeding Competition in Siberut Macaques (Macaca Siberu) and Assamese Macaques (Macaca Assamensis)
Within- and between-group feeding competition in Siberut macaques (Macaca siberu) and Assamese macaques (Macaca assamensis) Dissertation for the award of the degree "Doctor rerum naturalium" (Dr.rer.nat.) of the Georg-August-Universität Göttingen within the doctoral program Biology of the Georg-August University School of Science (GAUSS) submitted by Christin Richter from Leipzig Göttingen, 2014 Thesis committee First supervisor: Prof. Dr. Julia Ostner Courant Research Centre (CRC) Evolution of Social Behaviour, JRG Social Evolution in Primates, Georg-August-University Göttingen Second supervisor: Prof. Dr. Peter M. Kappeler Department for Sociobiology/ Anthropology, Johann-Friedrich-Blumenbach Institute for Zoology & Anthropology, Georg-August-University Göttingen Adviser (“Anleiter”): Dr. Oliver Schülke Courant Research Centre (CRC) Evolution of Social Behaviour, JRG Social Evolution in Primates, Georg-August-University Göttingen Members of the examination board Reviewer: Prof. Dr. Julia Ostner Courant Research Centre (CRC) Evolution of Social Behaviour, JRG Social Evolution in Primates, Georg-August-University Göttingen Second Reviewer: Prof. Dr. Eckhard W. Heymann Behavioral Ecology and Sociobiology Unit, German Primate Center (DPZ), Leibniz Institute for Primate Research Further members of the examination board: Dr. Oliver Schülke, Courant Research Centre (CRC) Evolution of Social Behaviour, JRG Social Evolution in Primates, Georg-August-University Göttingen Dr. Antje Engelhardt, Sexual Selection Group, German Primate Center (DPZ), -
Thiel, C. 2011. Ecology and Population Status of the Serval Leptailurus Serval in Zambia
Thiel, C. 2011. Ecology and population status of the serval Leptailurus serval in Zambia. Thesis: 1-294. Rheinischen Friedrich-Wilhelms-Universität Bonn. 2011. Keywords: 1ET/1KE/1TZ/1UG/1ZA/1ZM/diet/disease/distribution/ecology/habitat/habitat preference/Leptailurus serval/parasites/population status/prey/prey availability/serval/status Abstract: Little is known about the Serval's ecology, its needs and population status. This thesis is providing a new and detailed groundwork on this elusive felid species. The study was conducted between 2006 and 2008 in Zambia, with the focus area being Luambe National Park (LNP) in the Luangwa Valley. Using transect line walking, signs of Serval presence (faeces, spoor and sightings) were recorded. Analyses of these records revealed new information on the diet, habitat preferences, the distribution within LNP, and parasite composition in faecal samples. The most studied fact on Servals found in literature is their diet, through scats analyses, observations and stomach analyses. Faeces analyses of this thesis supported the previous studies' findings that the Leptailurus serval is a rodent hunter. But besides that, they also prey extensively on birds, on reptiles, and on arthropods. A diet breadth of 0.5 also indicates a more opportunistic lifestyle. People associate Servals with grasslands and wetlands, but this study proved the Servals to use also thickets and riverine woodland. This felid needs water resources nearby and a certain degree of cover, whether it is grass or thickets/bushes. Closed forests with little ground cover are less preferred or even avoided habitats. parasites of Servals were never analysed up to now. This analysis revealed Rhipicephalus sanguineus and Haemaphysalis leachi, both so-called 'Dog Ticks', to be the most common tick of Leptailurus serval. -
The Parasol Tail and Thermoregulatory Behavior of the Cape Ground Squirrel Xerus Inauius'
THE PARASOL TAIL AND THERMOREGULATORY BEHAVIOR OF THE CAPE GROUND SQUIRREL XERUS INAUIUS' ALBERT F. BENNETT, RAYMOND B. HUEY, HENRY JOHN-ALDER, AND KENNETH A. NAGY School of Biological Sciences, University of California, Irvine, California 92717; Department of Zoology, University of Washington, Seattle, Washington 98195; Department of Developmental and Cell Biology, University of California, Irvine, California 92717; Department of Biology, University of California, Los Angeles, California 90024 (Accepted 6/2/83) The Cape ground squirrel, Xerus inauris, a diurnally active inhabitant of hot arid regions of southern Africa, reduces environmental heat load by using its bushy tail as a portable parasol. During late spring in the southern Kalahari, operative envi- ronmental temperature (T,) was measured on thermal mannequins of differing posture and tail orientation. Simultaneously, the thermoregulatory behavior of a free-living colony of squirrels was observed. The tail is raised to shade the body and the squirrels turn their backs to the sun whenever T, exceeds approximately 40 C. The shade provided by the tail reduces T, by over 5 C and allows squirrels to extend greatly their periods of continuous surface foraging (up to 7 h instead of 3 h). At midday, squirrels must frequently retreat to their burrows as T, of tail-shaded animals then also exceeds 40 C. INTRODUCTION during the hottest period of the day, thereby Most small mammals living in deserts greatly increasing its foraging time. are nocturnal and thereby avoid exposure Cape ground squirrels spend their day to heat during the hottest times of the day. foraging for small plants and seeds around Nevertheless, a few species, such as ground their burrow entrances (Zumpt 1968; Her- squirrels, are diurnal. -
Nature Feature
Nature Feature KOEKAIS To update this pdf download the newest edition on http://koekais.co.za/Nature-Feature/ This is an initiative of our Field Guide, Masha de Klerk and updates done by Nadia van Zyl Featuring a new plant or animal species that calls Koekais Guest Farm home Birds / Voëls Southern Yellowbilled Hornbill / Suidelike Geelbekneushoringvoël Tockus leucomelas Hadida / Hadeda Ibis Bostrychia hagedash Nonnetjie-uil / Common barn owl / Ghost owl Tyto alba Gewone Tarentaal / Helmeted Guineafowl Numida meleagris Gompou / Kori Bustard / Kgori Ardeotis kori kori Mammals / Soogdiere Meerkat/Suricate Scientific Name: Suricata suricatta Warthog / Vlakvark Phacochoerus africanus Aardwolf Proteles cristata Steenbok / Steenbuck Raphicerus campestris Dassie / Klipdassie / Rock Hyrax / Rock Badger Procavia capensis Duiker / Common, Grey or Bush Duiker Sylvicapra grimmia Blou-aap / Vervet monkey / Tumbili Chlorocebus pygerythrus / Cercopithecus pygerythrus Koedoe / Kudu / Greater Kudu Tragelaphus strepsiceros Grondeekhoring / Waaierstermeerkat / South African Ground Squirrel / Cape Ground Squirrel Xerus inauris Iietermago / Ietermagog / Common Ground Pangolin Manis temmincki Reptiles / Reptiele Geelslang / Koperkapel / Kaapse Kobra / Cape Cobra / Yellow Cobra Naja nivea Likkewaan / Leguaan / White Throated Monitor Lizard / Rock Monitor Lizard Varanus albigul Bloukopkoggelmander / Southern Rock Agama Agama atra Pofadder / Puff Adder / Ibululu Bitis arietans Tortoises / Skilpaaie Bergskilpad / Leopard Tortoise / Mountain -
Namibia & Botswana Ii 2019
Field Guides Tour Report NAMIBIA & BOTSWANA II 2019 Nov 5, 2019 to Nov 24, 2019 Terry Stevenson For our tour description, itinerary, past triplists, dates, fees, and more, please VISIT OUR TOUR PAGE. One of the first endemics we found were the localized Monteiro's Hornbills. We got very good views of them in the Erongo Mountains, and also near Windhoek. Our local guide Tarry Butcher got a lovely image of two of these interesting birds perched together. Our November 2019 Namibia and Botswana tour took place during the worst drought ever recorded, leaving some areas totally without living vegetation. At first reading this might seem depressing, but in reality it turned out to be a wonderful time to visit, with all the endemic/near endemic birds we hoped for, and a spectacular mammal list too. Such a widespread drought meant that for many species the remaining waterholes were vital for their survival - attracting far more Lions, Black Rhino and Elephant than usual, plus many large herds of zebra, wildebeest and springbok. As always we met in Johannesburg and flew to Windhoek the following day. We then had lunch at the Galton Guesthouse before spending the afternoon at the local sewage works. This might not sound like an ideal way to begin a tour, but in a country which is largely desert (and in a drought year) any area of water is worth a visit. South African Shelduck was a highlight here, as were African Swamphen, Three-banded Plover, African Jacana, African Darter, Hamerkop, Little Bittern, and Sacred Ibis. While in the surrounding acacia woodland Gray Go-away-bird, Dideric Cuckoo, White-backed Mousebird, the endemic Monteiro's Hornbill, Pied Barbet, and Scarlet-chested Sunbird were all enjoyed.