Alexander Sliwa

Alexander Sliwa
Cologne Zoo

PhD

About

89
Publications
32,794
Reads
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739
Citations
Citations since 2017
37 Research Items
325 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
Introduction
Small wild cat species (Felis nigripes, Felis lybica, Felis margarita) ecological and behavioural research via telemetry, camera trapping. Direct observations via habitutation of these. Macroscelidae both in the wild and captivity. Various families of mammals in captivity, mainly felids, primates, but als macroscelids, bovids, cervids. Reintroduction projects for felids
Additional affiliations
September 2007 - present
University of Cologne
Position
  • Lecturer
Description
  • Biodiversity; Zoo Biology
January 1994 - June 1999
Bergische Universität Wuppertal
Position
  • Lecturer
Description
  • zoological excursions; basic vertebrate systematics and biology
January 1991 - November 1996
University of Pretoria
Position
  • PhD Student
Education
August 1988 - June 1989
Tulane University
Field of study
  • Zoology
October 1984 - January 1991
Freie Universität Berlin
Field of study
  • Biology

Publications

Publications (89)
Article
Data on African sand cats Felis margarita margarita was collected in the southern provinces of Morocco between December 2015 and December 2019. Within these four years, a total of 47 sand cats were observed, 41 were captured and 22 were fitted with VHF radio-collars and tracked over various time spans. Home-range size estimations were calculated fo...
Article
Full-text available
Unlabelled: There are only about 7,100 adolescent and adult cheetahs (Acinonyx jubatus) remaining in the wild. With the majority occurring outside protected areas, their numbers are rapidly declining. Evidence-based conservation measures are essential for the survival of this species. Genetic data is routinely used to inform conservation strategie...
Preprint
Full-text available
There are only about 7,100 adolescent and adult cheetahs remaining in the wild. With the majority occurring outside protected areas, their numbers are rapidly declining. Evidence-based conservation measures are essential for the survival of this species. Genetic data is routinely used to inform conservation strategies, e.g., by establishing conserv...
Article
Full-text available
The Persian Leopard Breeding Programme together with the Felid TAG of the EAZA is responsible for securing a self-sustaining captive population with the highest possible genetic diversity of this threatened leopard subspecies. The ex situ population is serving as a source for breeding leopards in the Sochi Breeding Center in the Russian Caucasus, b...
Technical Report
Full-text available
Annual Report of the Black-footed Cat Working Group - 2021. Report on surveying and monitoring Black-footed cats (Felis nigripes) on Benfontein Nature Reserve, South Africa, and Grünau Farms in Namibia.
Article
The black-footed cat (Felis nigripes) is the smallest felid species in Africa and is endemic to the arid regions of southern Africa. It is currently listed as “Vulnerable” in the International Union for the Conservation of Nature (IUCN) red list of threatened species, with a population decline suspected over the general range. Since 2005, the B...
Article
During a telemetry study, body weights and body measurements of African sand cats Felis margarita margarita were recorded in the southern provinces of Morocco between December 2015 and December 2019. In total, 41 individuals (30 males and 11 females) were captured, weighed, and the body measurements of the specimens selected for radio-collaring wer...
Article
Full-text available
The use of captive-born lynx for reintroduction programmes has been controversially discussed in the past, but projects such as the reintroduction in the Harz Mountains have demonstrated that zoo-born lynx can adapt to living in the wild. However, phylogenetic considerations require that the zoo-based population is known and that subspecies are bre...
Article
Tapirs are a taxonomic group with a high susceptibility to mycobacterial diseases. However, successful therapy has only been documented sporadically. Here treatment of mycobacteriosis diagnosed in three, one male and two female, lowland tapirs (Tapirus terrestris) in a zoo in Germany is reported. Two of the animals showed chronic mild respiratory s...
Article
Full-text available
For conservation breeding, the endangered Lion-tailed Macaques have been maintained in North America under SSP since 1983 and in Europe under EEP since 1989. Based on a growing interest to support the species long-term survival, the SSP population increased considerably during the first few years of the programme but due to space problems and resul...
Article
Several studies have shown higher costs of rearing sons than daughters in mammals where males are larger than females. These studies typically focus on females by examining how the offspring sex ratio during a single reproductive event affected mothers’ subsequent reproduction or survival probability. Here, we examine relationships between offsprin...
Technical Report
Full-text available
Annual Report of the Black-footed Cat Working Group - 2020. Report on surveying and monitoring Black-footed cats (Felis nigripes) on Benfontein Nature Reserve, South Africa, and Grünau Farms in Namibia.
Article
A fifth of all known species are currently classified as threatened in the wild: the rate of biodiversity loss is rapid, continuous, and mostly due to anthropogenic activities. To slow down this decline, the accurate estimation of demographic parameters for threatened species is critical. With this aim, zoo institutions play an important role, givi...
Article
Full-text available
The probable documentation of a northern tiger cat in low elevation forest in the province of Bocas del Toro within the indigenious comarca Naso Tjërdi, Panama.
Article
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By compiling a wildcat catalogue of georeferenced digital photographs from Southwest Asia, we investigated the plausibility of phenotypically identifying Felis silvestris caucasica (Caucasian wildcat), Felis lybica ornata (Asiatic wildcat) and Felis lybica lybica (African wildcat) through external phenotypic traits, in order to verify their known d...
Article
The efficacy, safety, physiologic effects, and reversibility of butorphanol-medetomidine-midazolam (BMM) immobilization were evaluated in black-footed cats (Felis nigripes) and compared between captive and wild animals. Nine captive and 14 wild black-footed cats were hand injected into an accessible hind limb muscle group with the BMM combination....
Article
Full-text available
The sand cat, Felis margarita Loche, 1858, is a small desert cat with a fragmented distribution across the Sahara, Arabian Peninsula, and Central Asia. It is currently listed as Least Concern by the IUCN; however, its status in many countries is unknown. Sand cats are generally classified into four subspecies: F. m. margarita (North Africa and Saha...
Article
Full-text available
Tapirs seem particularly susceptible to mycobacterial infections, especially to tuberculosis caused by M. tuberculosis or M. bovis. In this case series, we report an infection with the non‐tuberculous mycobacteria (NTM) species M. avium ssp. hominissuis (MAH) in a group of four (2.2) captive lowland tapirs (Tapirus terrestris). Two female tapirs sh...
Technical Report
Full-text available
Annual Report of the Black-footed Cat Working Group - 2019. Report on surveying and monitoring Black-footed cats (Felis nigripes) on Benfontein Nature Reserve, South Africa, and in Namibia
Article
Full-text available
Despite their ubiquity, in most cases little is known about the impact of eukaryotic parasites on their mammalian hosts. Comparative approaches provide a powerful method to investigate the impact of parasites on host ecology and evolution, though two issues are critical for such efforts: controlling for variation in methods of identifying parasites...
Article
Full-text available
Despite their ubiquity, in most cases little is known about the impact of eukaryotic parasites on their mammalian hosts. Comparative approaches provide a powerful method to investigate the impact of parasites on host ecology and evolution, though two issues are critical for such efforts: controlling for variation in methods of identifying parasites...
Article
Full-text available
Article published in the Journal "Koenigiana" Vol 13(1): 13-30 in German. English Summary below. Saiga-Antilopen (Saiga tatarica) aus den Steppen und Halbwüsten Asiens wurden von 1976 bis 2009 im Kölner Zoo gehalten und gezüchtet. Wir haben uns mit Haltung, Leben und Zucht der Saigas im Kölner Zoo beschäftigt. Dieser Artikel gibt einen Einblick in...
Technical Report
Full-text available
The Black-footed Cat Working Group (BFCWG) aims to conserve this rare cat species (Felis nigripes) by furthering awareness and conducting multidisciplinary research on the species’ biology. So far the group had concentrated in two study areas in central South Africa, however one of these has been suspended in November 2018. It became apparent that...
Technical Report
Full-text available
Annual Report of the Black-footed Cat Working Group for the year 2018 - Report on surveying, catching and monitoring Black-footed cats (Felis nigripes) on Benfontein Nature Reserve, Nuwejaarsfontein and Taaiboschpoort Farms in 2018
Article
The black-footed cat (Felis nigripes) is the smallest felid of Southern Africa, endemic to the arid steppe and savannah habitats. However, though threatened and characterized by decreasing sizes of its populations, a number of ecological, demographic, sanitary, and genetic aspects, essential for the long-term conservation of the species, still rema...
Conference Paper
The Saiga antelope (Saiga tatarica) is an extraordinary bovid and a special and demanding animal to keep in a zoo. Critically endangered due to various threats in the wild, but no longer kept by zoos outside of Kazakhstan, the question arose if and how a captive breeding programme might support conservation measures in their natural range. Cologne...
Technical Report
Full-text available
Black-footed Cat Working Group - Report on surveying, catching and monitoring Black-footed cats (Felis nigripes) on Benfontein Nature Reserve, Nuwejaarsfontein and Taaiboschpoort Farms in 2017.
Article
The saiga (Saiga tatarica, Bovidae, Cetartiodactyla) is facing a precarious situation in the wild and unfortunately also zoos have failed so far in establishing a stable captive population. Cologne Zoo was one of the most successful zoos in holding and breeding this endangered species. We analysed life history and breeding of the Cologne animals. W...
Article
Full-text available
We report here on the first sighting and photographic documentation of kittens of African sand cats Felis margarita margarita in the region of Addrar Souttouf in the Moroccan Sahara near the Atlantic coast in late April 2017.
Article
After integrating the Tehran Zoo into the Persian Leopard PL European Endangered Species Programme EEP, semen was collected from the 17 years old Persian leopard Panthera pardus saxicolor male "Rica" to secure its genes for the breeding programme. The PL EEP is currently undertaking big efforts to improve its gene pool and to increase the reproduct...
Article
Full-text available
The saiga (Saiga tatarica), a critically endangered antelope of the steppes and semi-deserts of Asia, is currently not kept by any zoo outside of Kazakhstan. This article is dealing with the former husbandry and breeding of this extraordinary antelope at Cologne Zoo from 1976 to 2009. Retrospectively, we describe the rather difficult character of t...
Article
Full-text available
English version of the article “Saiga-Antilopen (Saiga tatarica) im Kölner Zoo: tiergärtnerische Erfahrungen und Beobachtungen” published in 2016 in Zeitschrift des Kölner Zoos Vol. 59 (3): 135-149 The saiga (Saiga tatarica), a critically endangered antelope of the steppes and semi-deserts of Asia, is currently not kept by any zoo outside of Kazak...
Article
Full-text available
The leopard (Panthera pardus) is widespread but increasingly threatened, uplisted to Vulnerable (VU) by the IUCN Redlist in 2016. Again in 2016 the ZGAP, Deutsche Tierparkgesellschaft (DTG), Gemeinschaft der Zooförderer (GDZ) proclaimed the leopard as “Zooanimal of the year” in order to alert the public with the help of zoos to the increasingly dir...
Chapter
Full-text available
This species is listed as Least Concern as it is widespread within the assessment region and present in numerous protected areas and habitats, as long as there are termites available. Aardwolves can occupy open and degraded grassland where there is high termite abundance. The expansion of wildlife ranching may be increasing suitable habitat across...
Chapter
Full-text available
We list Black-footed Cat as Vulnerable C2a(i), as population size is estimated to be fewer than 10,000 mature individuals, where no subpopulation is suspected to be more than 1,000 mature individuals, and there is an inferred continuing decline. We note that this is a precautionary assessment given the low density estimates used in the analysis, th...
Article
Full-text available
We report on the North African subspecies of the sand cat Felis margarita margari- ta and other desert carnivores in the Moroccan Sahara. The study was initiated in December 2015 under the approval of the Haut Commissariat aux Eaux et Forêts et à la Lutte Contre la Désertification, and during 12 days of fieldwork, six carnivore species were observe...
Chapter
The snow leopard has been kept since 1851 in European zoos. Despite the recording of all captive individuals in the international studbook by the first author since 1976, better cooperation in breeding and data sharing was achieved after a snow leopard conference at Helsinki Zoo in 1978 and the establishment of the European Endangered Species Progr...
Research
Full-text available
Black-footed Cat Working Group - Report on surveying, catching and monitoring Black-footed cats (Felis nigripes) on Benfontein Nature Reserve, Nuwejaarsfontein and Taaiboschpoort Farms in 2014
Article
Full-text available
The black-footed cat (Felis nigripes) is sympatric with several species of larger carnivores, although it is not known how this species partitions resources with potential competitors. From 2006 to 2008, we captured, radio-collared, and monitored 3 adult black-footed cats on Benfontein Game Farm in South Africa. We investigated their spatial, habit...
Article
Full-text available
Olbricht, G. & Sliwa, A. 2014. Elephant shrews (sengis) - neither rodent nor shrew: A historical perspective. Navors. nas. Mus., Bloemfontein 30(2): 18-30. We provide an overview of the family Macroscelididae, commonly known as elephant shrews or sengis, starting with their fossil history in the mid-Cretaceous period to their phylogenetic placeme...
Article
Full-text available
We report here on past and recent sightings of sand cats Felis margarita margarita in their westernmost distribution area of the Moroccan Sahara. Sand cats were searched for while driving along roads, pistes and cross country using the headlights and high powered spotlamps from the roof of two vehicles looking for their eyeshine. The sex and age of...
Article
Full-text available
Many conservation-oriented breeding programs are not likely to reach their goal of establishing self-sustaining populations. Some zoo biologists propagate to reconsider zoo-based conservation policies and strategies. The Lion-tailed Macaque is a flagship species for in situ conservation and a high priority species in captive propagation. This artic...
Article
Full-text available
Preliminray data on four radio-collared Eastern Rock Sengis (Elephantulus myurus) is presented. Animals were tracked for two week on a 1500 ha farm 20 km north of Bethulie in the Southertn Free state South Africs. Home range sizes were 0.66 - 3.96 ha.
Poster
Full-text available
Guidelines on the successful release of hand-reared black-footed cats are not readily available. The objective of the project was to gain information and data relating to the soft-release process of two hand-reared black-footed cats. We recorded in detail the behaviour, movement and adaptation of the cats to their enviroment during all phases of th...
Article
The black-footed cat (Felis nigripes) is endemic to the south-west arid zone of the southern African subregion. Since 1975, black-footed cats are kept at the Zoological Garden of Wuppertal. A retrospective study of necropsy records stated kidney failure as the main mortality cause of captive animals. Further analysis led to the diagnosis of general...
Article
Full-text available
Hindgut fermentation has been suggested to contribute significantly to the digestive process in the gelada (Theropithecus gelada). We therefore hypothesized that in an in vitro fermentation test (Hohenheim gas test, using gas production as measure of microbial digestion) inoculum based on fresh gelada feces would degrade grass to a similar degree a...
Article
Little is known about salivary alpha-amylase expression in primates. We compared saliva of gelada and hamadryas baboons, chimpanzees and humans using SDS-PAGE and immunoblotting. Amylase expression was increased in hamadryas baboons (P = 0.0376) compared to humans and might indicate dietary starch use in Cercopithecines.
Article
Full-text available
Gelada baboons are the sole survivors of the genus Theropithecus and the only known graminivorous primates. They developed special adaptations to their diet such as high-crowned teeth for processing hard and abrasive feed. The fine-tuning of salivary protein composition might be another key mechanism that is used by species for adapting to the envi...
Article
Full-text available
The Iberian Lynx Conservation Breeding Program follows a multidisciplinary approach, integrated within the National Strategy for the Conservation of the Iberian lynx, which is carried out in cooperation with national, regional and international institutions. The main goals of the ex situ conservation programme are to: (1) maintain a genetically and...
Technical Report
Full-text available
Mallon, D.P., Sliwa, A. & Strauss, M. 2011. Felis margarita. The IUCN Red List of Threatened Species 2011: e.T8541A12917127. http://dx.doi.org/10.2305/IUCN.UK.2011-2.RLTS.T8541A12917127.en.
Technical Report
Full-text available
Article
Full-text available
During a 6-year field study on the game farm ‘Benfontein’ in the central Republic of South Africa 1725 prey items were observed consumed by 17 free-ranging habituated black-footed catsFelis nigripes Burchell, 1824. Average prey size was 24.1 g. Eight males fed on significantly larger prey (27.9 g) than 9 females (20.8 g). Fifty-four prey species we...
Article
Full-text available
The first radio-tracking study on two Gordon's wildcats, Felis silvestris gordoni (Harrison 1968) revealed several results important for the conservation of the wildcat in the region (Phelan & Sliwa 2005)
Article
Two Gordon's wildcats (Felis silvestris gordoni; Harrison, The Mammals of Arabia, Vol. 2, Ernest Benn Ltd, London, 381pp) were radio-tracked over 1.5 months (male) and 14 months (female) in the desert of the Sharjah Emirate in the United Arab Emirates. The annual range of the female, using the 95% Minimum Convex Polygon (MCP95) estimator was 51.21...
Article
Full-text available
A total of 17 black-footed cats (7 males, 10 females) were studied by telemetry and direct observation on a game farm near Kimberley, South Africa. Total annual ranges of five adult resident males averaged 20.7km2(100% Minimum Convex Polygon (MCP100)) or 16.1 km2(95% MCP=MCP95) incorporating all fixes taken, and were significantly larger than the a...
Article
Full-text available
In this publication we consider life history data of pudus as recorded in the 8th Volume of the International Studbook for the Chilean Pudu, Pudu pudu. The scope of the data includes the minimum period starting in 1967 until at least 31.12.2000, that is 34 years. Birthmass, Gestation period, sexual maturity, birth seasonality, sex ratio, life rep...
Article
Full-text available
Life history data for Chilean pudus (Pupu pudu) maintained and bred at zoological gardens for the period of 34 years (1967 - 2000)