Dynamics of haematology and blood biochemistry in free-living African whitebacked vulture (Pseudogyps africanus) nestlings

Wyk, Erika van; Bank, Herman van der; Verdoorn, Gerhard H.

doi:10.1016/s1095-6433(98)10059-4

Cited by 29 publications

(18 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Osprey nestlings showed rising concentrations of triglyceride with age, probably as a result of general increases in energy reserves and weight as well as a more active endogenous lipid metabolism associated with increasing physical activity during the growth stage prior to fledging (Van Wyk et al 1998). However, we did not detect a positive correlation between cholesterol and triglycerides.…”

Section: Effect Of Sex and Agementioning

confidence: 99%

Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Muriel

Schmidt²,

Calabuig

et al. 2013

J Ornithol

View full text Add to dashboard Cite

We assessed the normal values for 15 blood plasma biochemistry parameters and three indices of body condition (IBCs) in free-living Osprey (Pandion haliaetus) nestlings in Brandenburg (Germany). Values were compared with those of other raptors, and possible sexual and age-related differences were examined. In addition, we looked for possible relationships of habitat quality (measured in terms of foraging conditions and human disturbances) to nestling nutritional condition and productivity. Female nestlings showed higher mean urea levels and lower glucose values than males, which could be related to higher growth rates and nutrient demand of females at the end of the nestling period. Seven parameters also showed variation with age, probably relating to increasing body mass, metabolic rates, and physical activity during the pre-fledging stage. Conversely, the IBCs showed poor correlations with selected nutritional parameters, probably due to the homogeneously acceptable nutritional conditions of the nestlings. Finally, we found that Ospreys did not seem to adjust initial parental investment in relation to habitat quality, since productivity was not affected by habitat indicators. However, in large broods, but not in small ones, nestling nutritional condition improved as foraging conditions improved. These results suggest that females that are in better physical condition seem to produce more and better nourished nestlings in better foraging conditions. Wir beurteilten Normalwerte für 15 biochemische Blutplasma-Parameter und drei Indizes für die Körperkondition (Indices of Body Condition-IBCs) bei freilebenden nestjungen Fischadlern (Pandion haliaetus) in Brandenburg (Deutschland). Die Werte wurden mit denen anderer Greifvogelarten verglichen und mögliche geschlechts-und altersabhängige Unterschiede wurden untersucht. Zusätz-lich haben wir denkbare Zusammenhänge zwischen der Habitatqualität-gemessen anhand der Lage von Gebieten der Nahrungssuche und anhand menschlicher Störung-und dem Ernährungszustand der Nestlinge sowie der Reproduktion untersucht. Weibliche Nestlinge zeigten höhere Harnstoff-Durchschnittswerte und geringere GlukoseWerte als männliche, was mit einer höheren Wachstumsrate und einem höheren Nährstoffbedarf bei den jungen Weibchen gegen Ende der Nestlingsperiode zusammenhängen kann. Sieben Parameter zeigten Veränderungen abhängig vom Alter, wahrscheinlich im Zusammenhang mit der zunehmenden Körpermasse, mit dem höheren Metabolismus und mit der steigenden körperlichen Aktivität während der

show abstract

Section: Effect Of Sex and Agementioning

confidence: 99%

Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Muriel

Schmidt²,

Calabuig

et al. 2013

J Ornithol

View full text Add to dashboard Cite

show abstract

“…This knowledge is vital for understanding species' susceptible to diclofenac and to identify other potential toxic NSAIDs. At present, published hematology and blood biochemistry values for African White-backed Vulture are restricted to nestlings in South Africa (Van Wyk et al, 1998). Although useful, normal values for nestlings may not be representative for adult birds in which diclofenac toxicity is most likely to occur.…”

Section: Introductionmentioning

confidence: 99%

Establishment of Selected Baseline Blood Chemistry and Hematologic Parameters in Captive and Wild-Caught African White-Backed Vultures (Gyps Africanus)

Naidoo

Diekmann²,

Wolters

et al. 2008

Journal of Wildlife Diseases

View full text Add to dashboard Cite

ABSTRACT:Despite the devastating collapse of three vulture populations on the Asian subcontinent as a result of their exposure to diclofenac, there is little available information on the normal physiology of many vulture species, including the African White-backed Vulture (Gyps africanus). Such information is needed to fully understand mechanisms for toxicity and to identify and prevent future health problems. The aim of this study was to establish baseline parameters for hematologic and selected serum chemistry parameters for this model species for further studies into the toxicity of diclofenac. Captive nonreleasable and wild African White-backed Vultures were used to determine reference values. For hematology, erythrocyte counts, hemoglobin concentration, hematocrit, packed cell volume, mean corpuscular volume, mean corpuscular hemoglobin concentration, and total and differential leukocyte counts were measured. Chemical analytes measured included sodium, potassium, calcium, albumin, and globulin concentrations, aspartate aminotransferase, creatine kinase, and alanine aminotransferase activities. Uric acid and urea concentrations and the urea:uric acid ratio also were evaluated. Values are presented as means, standard deviations, and reference intervals. The serum chemistry parameters selected may provide a starting point for the evaluation of changes in renal and hepatic function; these organ systems are most severely affected by diclofenac. Results were also compared with values reported for G. africanus nestlings, and from these results it is evident that the clinical pathologic parameters are age related. This indicates that the use of nestling values for the evaluation of clinical pathologic findings in adults may be unreliable and could lead to incorrect assumptions.

show abstract

“…This finding also corresponded with published literature showing that the serum/plasma ChE activity of raptors is generally lower than that of omnivorous and herbivorous bird species. Serum/plasma ChE activity was, however, lower than that reported for juvenile (640-d-old) African White-backed Vultures (Gyps africanus) at 1,7966158.33 U/L (van Wyk et al 1998). The reason for the 50% lower value in the Cape Griffon Vulture is unknown, especially because previous studies have indicated that these two vulture species are closely related.…”

mentioning

confidence: 61%

“…One possible reason could be the use of different markers for the colorimetric quantification. Van Wyk et al (1998) used the acetylthiocholine reaction, whereas we used the butyrylthiocholine method because it is readily available in South Africa. The results from the other bird species with similar activities were achieved using either the acetylthiocholine method (Hooper et al 1989;Roy et al 2005) or the butyrylthiocholine method (Hernandez and Margalida 2010).…”

mentioning

confidence: 99%

Serum and Plasma Cholinesterase Activity in the Cape Griffon Vulture (Gyps coprotheres)

Naidoo

Wolter²

2016

Journal of Wildlife Diseases

View full text Add to dashboard Cite

Vulture (Accipitridae) poisonings are a concern in South Africa, with hundreds of birds dying annually. Although some of these poisonings are accidental, there has been an increase in the number of intentional baiting of poached rhinoceros (Rhinocerotidae) and elephant (Elephantidae) carcasses to kill vultures that alert officials to poaching sites by circling overhead. The primary chemicals implicated are the organophosphorous and carbamate compounds. Although most poisoning events can be identified by dead vultures surrounding the scavenged carcass, weak birds are occasionally found and brought to rehabilitation centers for treatment. The treating veterinarian needs to make an informed decision on the cause of illness or poisoning prior to treatment. We established the reference interval for serum and plasma cholinesterase activity in the Cape Griffon Vulture (Gyps coprotheres) as 591.58-1,528.26 U/L, providing a clinical assay for determining potential exposure to cholinesterase-depressing pesticides. Both manual and automated samplers were used with the butyrylthiocholine method. Species reference intervals for both serum and plasma cholinesterase showed good correlation and manual and automated measurements yielded similar results.

show abstract

Dynamics of haematology and blood biochemistry in free-living African whitebacked vulture (Pseudogyps africanus) nestlings

Cited by 29 publications

References 49 publications

Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Factors affecting plasma biochemistry parameters and physical condition of Osprey (Pandion haliaetus) nestlings

Establishment of Selected Baseline Blood Chemistry and Hematologic Parameters in Captive and Wild-Caught African White-Backed Vultures (Gyps Africanus)

Serum and Plasma Cholinesterase Activity in the Cape Griffon Vulture (Gyps coprotheres)

Contact Info

Product

Resources

About