Browsing Research Articles (Production Animal Studies) by UP Author "Bertschinger, Hendrik Jan"
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Browsing Research Articles (Production Animal Studies) by UP Author "Bertschinger, Hendrik Jan"
Now showing items 1-20 of 32
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Joone, C.J. (Carolynne); Schulman, M.L. (Martin); Fosgate, Geoffrey Theodore; Plagis, T.A.; Crafford, Jan Ernst; Gupta, Satish K.; Bertschinger, Hendrik Jan (Elsevier, 2019-03)Few studies have investigated the cell mediated immune response during zona pellucida-based immunocontraception, despite hypothesized cytotoxic T-cell involvement in ovarian dysfunction associated with these vaccines. This ...
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Fabregas, María C.; Ganswindt, Andre; Fosgate, Geoffrey Theodore; Bertschinger, Hendrik Jan; Meyer, Leith Carl Rodney (Springer, 2019-10)Changes in group composition are not exclusive to zoos and conservation breeding centers. The recent increase in poaching of African rhino species has accelerated the arrival of orphan calves at rehabilitation centers. ...
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Irons, Pete Charles; Nothling, Johan Oliviette; Bertschinger, Hendrik Jan (Elsevier, 2007-10-01)The motivation for and process leading up to the publication of a new bull breeding soundness certification standard endorsed by the South African Veterinary Association is described. The veterinary certificate of bull ...
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Fabregas, María C.; Garces-Narro, Carlos; Bertschinger, Hendrik Jan; Koehler, Gary (Wiley, 2017-02)Fewer than 3,500 tigers (Panthera tigris) remain in the wild. Habitat loss and fragmentation, and depletion of prey are key factors contributing to their decline, prompting investigations on prey requirements needed to ...
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Lueders, Imke; Young, Debbie; Maree, Liana; Van der Horst, Gerhard; Luther, Ilse; Botha, Stephan; Tindall, Brendan; Fosgate, Geoffrey Theodore; Ganswindt, Andre; Bertschinger, Hendrik Jan (Public Library of Science, 2017-09-15)OBJECTIVES : Although the African elephant (Loxodonta africana) is classified as endangered by the International Union for Conservation of Nature (IUCN), in some isolated habitats in southern Africa, contraception is ...
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French, Hilari; Segabinazzi, Lorenzo; Middlebrooks, Brittany; Peterson, Erik; Schulman, M.L. (Martin); Roth, Robyn; Crampton, Michael; Conan, Anne; Marchi, Silvia; Gilbert, Trevor; Knobel, Darryn Leslie; Bertschinger, Hendrik Jan (MDPI, 2022-11-24)This study aimed to test zona pellucida (ZP) vaccines’ immunocontraceptive efficacy and safety when formulated with non-Freund’s adjuvant (6% Pet Gel A and 500 Mg Poly(I:C)). Twenty-four jennies were randomly assigned ...
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Efficacy and safety of native and recombinant zona pellucida immunocontraceptive vaccines in donkeys French, Hilari; Peterson, Erik; Schulman, M.L. (Martin); Roth, Robyn; Crampton, Michael; Conan, Anne; Marchi, Silvia; Knobel, Darryn Leslie; Bertschinger, Hendrik Jan (Elsevier, 2020-09)Feral and semi-feral donkeys are recognised as a problem in some world regions. The main problem associated with uncontrolled donkey populations is habitat degradation and competition for feed resources, especially in arid ...
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Alhers, M.J.; Ganswindt, Andre; Munscher, Stefanie; Bertschinger, Hendrik Jan (Elsevier, 2012-07)Because of overpopulation of African elephants in South Africa and the consequent threat to biodiversity, the need for a method of population control has become evident. In this regard, the potential use of the porcine ...
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Bertschinger, Hendrik Jan; Caldwell, Peter (Wiley, 2016-09-01)Generally speaking, southern Africa's wildlife populations in small-to-medium-sized protected game reserves (10,000 65,000 ha) reproduce at rapid rates which often lead overpopulation of certain species. Most commonly these ...
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Delsink, Audrey K.; Van Altena, J.J.; Grobler, D.; Bertschinger, Hendrik Jan; Kirkpatrick, Jay F.; Slotow, Robert (South African Veterinary Association, 2007-03)The goal of programmes to provide contraception for elephants should be to formulate an approach that does not require the relocation or immobilisation of the same individual year after year, which would be long-lasting ...
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Delsink, Audrey K.; Kirkpatrick, Jay F.; Van Altena, J.J.; Bertschinger, Hendrik Jan; Ferreira, Sam M.; Slotow, Robert (American Association of Zoo Veterinarians, 2013-12)Opinions are divided as to whether human intervention to control elephant (Loxodonta africana) population growth is desirable, partly because of elephant welfare concerns. Female contraception through immunization with ...
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Valades, Gabriela Benavides; Ganswindt, Andre; Annandale, Cornelius Henry; Schulman, M.L. (Martin); Bertschinger, Hendrik Jan (BioMed Central, 2012-08-25)BACKGROUND: In southern Africa, various options to manage elephant populations are being considered. Immunocontraception is considered to be the most ethically acceptable and logistically feasible method for control of ...
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Hulsman, Alma; Dalerum, Fredrik; Ganswindt, Andre; Muenscher, Stefanie B.; Bertschinger, Hendrik Jan; Paris, Monique C.J. (Wiley-Blackwell, 2011-07)The brown hyaena (Hyaena brunnea) is the least known of the large predators of southern Africa. The current IUCN status of the brown hyaena is “Near Threatened”, and there are conservation concerns related to a general ...
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Garaï, Marion E.; Bates, Lucy A.; Bertschinger, Hendrik Jan; Delsink, Audrey; Pretorius, Yolanda; Selier, Jeanetta; Zitzer, Heike R. (AOSIS Open Journals, 2018-09-27)Management interventions are necessary to control elephant numbers within fenced wildlife reserves in South Africa. Use of non-lethal control methods is increasing, but information about their suitability and effects are ...
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Joone, C.J. (Carolynne); Schulman, M.L. (Martin); Bertschinger, Hendrik Jan (Elsevier, 2017-02)Despite more than 40 years of research into zona pellucida (ZP)–based vaccines, relatively little is known about their mechanism of action. Early research demonstrated precipitation of ZP glycoproteins by antiovarian ...
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Nolan, Margaret Bethaline; Bertschinger, Hendrik Jan; Roth, Robyn; Crampton, Michael; Martins, I.S. (Isabela); Fosgate, Geoffrey Theodore; Stout, T.A.E. (Tom); Schulman, M.L. (Martin) (Elsevier, 2018-10-15)An important determinant in the selection of any contraceptive agent is the impact on ovarian function, both in the short and longer term. In this study, ovarian activity was monitored in mares immunised with one of the ...
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Bertschinger, Hendrik Jan; Delsink, Audrey; Van Altena, J.J.; Kirkpatrick, Jay F. (AOSIS Open Journals, 2018-07-31)BACKGROUND : The native porcine zona pellucida (pZP) vaccine has been successfully used for immunocontraception of wild horses, white-tailed deer and approximately 90 zoo species for more than 25 years. OBJECTIVES : To ...
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Marais, Hendrik Johannes; Nel, P.; Bertschinger, Hendrik Jan; Schoeman, Johan P.; Zimmerman, D. (South African Veterinary Association, 2007-09)There are no reports in the literature describing any tumours, and specifically sarcoids, in zebras. The equine sarcoid, a locally aggressive, fibroblastic skin tumour, is the most common dermatological neoplasm reported ...
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Fabregas, María C.; Fosgate, Geoffrey Theodore; Ganswindt, Andre; Bertschinger, Hendrik Jan; Hofmeyr, Markus; Meyer, Leith Carl Rodney (Springer, 2020-05)Poaching is the primary threat to the survival of rhinoceros’ populations. One frequent consequence of poaching is the creation of orphan calves. If found, orphans are taken into captivity for rehabilitation and subsequent ...
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Van den Berghe, F.; Paris, Damien B.B.P.; Van Soom, A.; Rijsselaere, T.; Van der Weyde, L.; Bertschinger, Hendrik Jan; Paris, Monique C.J. (Elsevier, 2012-07)The African wild dog (Lycaon pictus) is an endangered exotic canid with less than 5500 animals remaining in the wild. Despite numerous strategies to conserve this species, numbers of free-living animals are in decline. ...
Now showing items 1-20 of 32