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Investigation and Treatment of Infertility in a Female Black Rhinoceros (Diceros bicornis).
Zoo Biol
January 2025
Taronga Conservation Society Australia, Taronga Institute of Science and Learning, Mosman New South Wales 2088, Taronga Western Plains Zoo, Dubbo, New South Wales, Australia.
A zoo-based, 11-year-old, uniparous southern black rhinoceros (Diceros bicornis minor) failed to conceive after weaning a calf. Behavioral observation and fecal progestagen monitoring confirmed irregular estrous cycles. Serial transrectal reproductive ultrasound examination revealed the cause to be recurrent anovulatory hemorrhagic follicles (AHFs).
View Article and Find Full Text PDFGenetic characterization of diagnostic epitopes of cardiac troponin I in African rhinoceros.
J Vet Diagn Invest
December 2024
Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, Onderstepoort, South Africa.
African rhinoceros undergo chemical immobilization and prolonged transport during translocations for conservation purposes and, hence, experience several pathophysiologic changes, including skeletal muscle injury. Potential concurrent myocardial injury has not been investigated due to a lack of validated immunoassays. We aimed to use inferred cardiac troponin I (cTnI) amino acid sequences of southern white () and southern-central black () rhinoceros to assess the potential usefulness of several commercial cTnI immunoassays for detecting cTnI in African rhinoceros.
View Article and Find Full Text PDFIdentification and Preliminary Analysis of Granulosa Cell Biomarkers to Predict Oocyte In Vitro Maturation Outcome in the Southern White Rhinoceros ().
Animals (Basel)
December 2024
Département des Sciences Animales, Université Laval, Quebec City, QC G1V 0A6, Canada.
In recent years, biomarkers in granulosa cells (GC) have been determined and associated in several species with oocyte maturation, in vitro fertilization success, and embryo development outcomes. The identification of biomarkers of oocyte competence can aid in improving assisted reproductive technologies (ARTs) in the southern white rhino (SWR). This study aimed to identify biomarkers present in SWR GC associated with oocytes that either did or did not mature in vitro.
View Article and Find Full Text PDFProgress Toward Genetic Rescue of the Northern White Rhinoceros ().
Annu Rev Anim Biosci
November 2024
2Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.
The northern white rhinoceros (NWR) is functionally extinct, with only two nonreproductive females remaining. However, because of the foresight of scientists, cryopreserved cells and reproductive tissues may aid in the recovery of this species. An ambitious program of natural and artificial gamete and in vitro embryo generation was first outlined in 2015, and many of the proposed steps have been achieved.
View Article and Find Full Text PDFExploring Serum Ferritin's Connection to the Acute Phase Response in Zoo-Managed African Rhinoceroses.
Zoo Biol
October 2024
Center for Conservation and Research of Endangered Wildlife (CREW), Cincinnati Zoo & Botanical Garden, Cincinnati, Ohio, USA.
Despite serum ferritin's potential as an iron status indicator, its concentrations vary significantly throughout a black rhinoceros's (Diceros bicornis) life, sometimes irrespective of iron load. We explored acute phase response-related biomarkers, serum amyloid A (SAA) and ceruloplasmin (Cp), to better understand the mechanisms influencing serum ferritin changes in managed black rhinoceroses. The objective was to evaluate the relationships between circulating levels of ferritin, SAA, and Cp in black and white rhinoceroses (Ceratotherium simum).
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