scholarly journals Rectal prolapse associated with a healed pelvic fracture in a pregnant free-ranging African black rhinoceros (Diceros bicornis). Part 2 : surgery and necropsy : case report

2001 ◽  
Vol 72 (4) ◽  
Author(s):  
A. Olivier ◽  
E. Lane ◽  
D.H. Volkmann ◽  
M. Hofmeyr ◽  
G.F. Stegmann
Keyword(s):  
Cardiac Arrest ◽  
New Bone Formation ◽  
Nerve Fibres ◽  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
White Rhinoceros ◽  
African Black ◽  
Sacral Foramina ◽  
Sacral Nerves ◽  
Free Ranging

The oedematous and traumatised protruding section of the rectal tissue of an adult free-ranging female African black rhinoceros (Diceros bicornis) was surgically amputated. Immediately before completion of surgery, the rhinoceros died of anaesthetic-related cardiac arrest. At necropsy a deformed pelvis and sacrum associated with a healed fracture of the left ileal wing were noted. New bone formation in and around the left ventral sacral foramina may have resulted in neuropathy of particularly the 3rd and 4th left ventral sacral nerves, which (in the horse) supply the majority of the nerve fibres innervating the caudal rectum and anus. The cause of the injury is not known, although back injuries, presumably sustained during mating by bulls, have been recorded in white rhinoceros. An encounter with elephants could also have been responsible for the injury in this case.

scholarly journals Rectal prolapse associated with a healed pelvic fracture in a pregnant free-ranging African black rhinoceros (Diceros bicornis). Part 1 : anaesthesia : case report

2001 ◽  
Vol 72 (4) ◽  
Author(s):  
G.F. Stegmann ◽  
M. Hofmeyr ◽  
A. Olivier ◽  
E. Lane ◽  
D.H. Volkmann
Keyword(s):  
Rectal Prolapse ◽  
Tidal Volume ◽  
Venous Blood ◽  
Blood Gas Analysis ◽  
Gas Analysis ◽  
Muscle Rigidity ◽  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
African Black ◽  
Free Ranging

Anaesthesia was required in a heavily-pregnant, adult, free-ranging African black rhinoceros Diceros bicornis with a rectal prolapse for examination and possible treatment. The animal was immobilised with 4.5 mg etorphine and 60 mg azaperone. For continued observation, the immobilised animal was transported to a boma. Additional etorphine and azaperone were administered to keep the animal anaesthetised during treatment and transport. In addition, 15 mg nalorphine was administered during this time to improve ventilation and reduce muscle rigidity. Sixty hours later, in preparation for surgery, 2.5 mg etorphine and 40 mg azaperone were administered, followed by endotracheal intubation and halothane anaesthesia. During anaesthesia, a decrease in tidal volume was observed. Venous blood-gas analysis indicated a decrease in the oxygen partial pressure, and a mixed respiratory and metabolic acidosis. Cardiac arrest was preceded by an increase in heart rate and tidal volume after 80 min of inhalation anaesthesia.

Serial Temperature Monitoring and Comparison of Rectal and Muscle Temperatures in Immobilized Free-Ranging Black Rhinoceros (Diceros bicornis)

2012 ◽  
Vol 43 (1) ◽  
pp. 120-124 ◽  
Author(s):  
Peter vdB Morkel ◽  
Michele Miller ◽  
Mark Jago ◽  
Robin W. Radcliffe ◽  
Pierre du Preez ◽  
...  
Keyword(s):  
Temperature Monitoring ◽  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
Free Ranging

scholarly journals A serological survey of brucellosis in wild ungulate species from five game parks in Zimbabwe

2013 ◽  
Vol 80 (1) ◽  
Author(s):  
Tatenda R. Motsi ◽  
Shadreck C. Tichiwangana ◽  
Gift Matope ◽  
Norman L. Mukarati
Keyword(s):  
African Buffalo ◽  
Serological Survey ◽  
Serum Samples ◽  
Wild Ungulate ◽  
Black Rhinoceros ◽  
White Rhinoceros ◽  
The Difference ◽  
Free Ranging ◽  
Aepyceros Melampus

A retrospective serosurvey was carried out between 2009 and 2012 to detect antibodies to Brucella spp. in free-ranging African wildlife ungulates from five selected game parks in Zimbabwe. Samples were drawn from wildlife-livestock interface and non-interface areas in Zimbabwe. A total of 270 serum samples from four different species, namely African buffalo (Syncerus caffer) (n=106), impala (Aepyceros melampus) (n = 72), black rhinoceros (Diceros bicornis) (n= 45) and white rhinoceros (Ceratotherium simum) (n = 47), were tested. The percentage of positive samples was 17.0% in buffalo (18/106; 95% CI: 9.72% – 24.1%) and 1.4% in impala (1/72; 95% CI: 0% – 4.2%). No antibodies to Brucella spp. were detected in the two rhinoceros species. The difference in the percentage of seropositive cases between buffalo and impala was significant (p< 0.05). Seropositivity to Brucella spp. was higher (19.1%) in adult buffalo compared with juveniles and sub-adults younger than six years (5.9%). Further, seropositivity was marginally higher (20.4%) in animals from wildlife-livestock interface areas than in those from non-interface areas (13.45%; OR = 1.45) although the difference was not statistically significant. The study showed that brucellosis could be more widespread in buffalo and may circulate in this species independently in the absence of contact with cattle, whilst rhinoceros may be considered less susceptible to brucellosis. The role of the wildlife-livestock interface in the epidemiology of brucellosis in wildlife and livestock is probably overstated but needs to be explored further.

EVALUATION OF SERUM FERRITIN AND SERUM IRON IN FREE-RANGING BLACK RHINOCEROS (DICEROS BICORNIS) AS A TOOL TO UNDERSTAND FACTORS AFFECTING IRON-OVERLOAD DISORDER

2016 ◽  
Vol 47 (3) ◽  
pp. 820-826 ◽  
Author(s):  
Michele Miller ◽  
Patricia Sue Chavey ◽  
Jennifer Hofmeyr ◽  
Nomkhosi Mathebula ◽  
Alyssa Doering ◽  
...  
Keyword(s):  
Iron Overload ◽  
Serum Ferritin ◽  
Serum Iron ◽  
Factors Affecting ◽  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
Free Ranging

Population dynamics and future conservation of a free-ranging black rhinoceros (Diceros bicornis) population in Kenya

2001 ◽  
Vol 99 (2) ◽  
pp. 237-243 ◽  
Author(s):  
M.J. Walpole ◽  
M. Morgan-Davies ◽  
S. Milledge ◽  
P. Bett ◽  
N. Leader-Williams
Keyword(s):  
Population Dynamics ◽  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
Free Ranging

scholarly journals Cardiopulmonary Parameters and Arterial Blood Gases During Etorphine-Medetomidine-Midazolam Immobilization in Free-Ranging Black Rhinoceroses (Diceros bicornis) Undergoing Electro-Ejaculation—A Preliminary Study

2021 ◽  
Vol 8 ◽  
Author(s):  
Janine Meuffels ◽  
Imke Lueders ◽  
Henk Bertschinger ◽  
Ilse Luther-Binoir ◽  
Friederike Pohlin ◽  
...  
Keyword(s):  
Mixed Model ◽  
Lactate Concentration ◽  
Blood Gases ◽  
Muscle Rigidity ◽  
Arterial Blood Gas ◽  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
Management Interventions ◽  
Arterial Blood ◽  
Free Ranging

Conservation management interventions for the critically endangered black rhinoceros (Diceros bicornis) require immobilization, which offer opportunities for semen collection and cryopreservation to establish genetic reservoirs. In free-ranging rhinoceroses, a combination of the potent opioid etorphine and the tranquilizer azaperone is routinely used for chemical immobilization but is associated with muscle rigidity and severe cardiopulmonary changes. Additionally, azaperone inhibits semen emission. Seven free-ranging, male, sexually mature black rhinoceroses were immobilized with an alternative protocol consisting of 4.5 mg etorphine, 5 mg medetomidine, 50 mg midazolam and 2,500 IU hyaluronidase delivered remotely by darting from a helicopter. During the immobilization, electro-ejaculation was performed with a portable electro-ejaculator, and a species-specific rectal probe. Animals were observed for muscle tremors. Longitudinal changes in respiratory rate, heart rate and peripheral oxyhemoglobin saturation, measured at 5 min intervals, were assessed using a general mixed model. Non-invasive oscillometric blood pressure and arterial blood gas variables were measured at first handling and before reversal and compared using the Wilcoxon rank sum test. All animals were successfully immobilized, showed no muscle tremors, presented with normal heart rates and lactate concentration (&lt;5 mmol/L), recovered uneventfully, but experienced acidemia, hypoxemia and hypercapnia. Induction time and total time in recumbency were 4.2 ± 0.41 and 38.4 ± 6.9 min, respectively. Electro-stimulation commenced after 11.7 ± 3.98 min and completed after 24.3 ± 6.65 min. Semen-rich fractions were successfully collected from six animals. Our observations indicate that etorphine-medetomidine-midazolam provides a promising immobilization protocol for free-ranging black rhinoceroses, that allows for successful electro-ejaculation.

CHANGES DURING LACTATION IN THE COMPOSITION OF THE MILK OF THE AFRICAN BLACK RHINOCEROS (DICEROS BICORNIS)

2009 ◽  
Vol 145 (3) ◽  
pp. 327-333 ◽  
Author(s):  
MARGARET E. GREGORY ◽  
S. J. ROWLAND ◽  
S. Y. THOMPSON ◽  
VANDA M. KON
Keyword(s):  
Black Rhinoceros ◽  
Diceros Bicornis ◽  
African Black
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