Open AccessReference intervals for parameters of health of eastern grey kangaroos Macropus giganteus and management implications across their geographic range
Author(s) -
Brandimarti Maquel E.,
Gray Rachael,
Coulson Graeme,
Cripps Jemma K.,
Wilson Michelle E.,
Death Clare,
Snape Melissa,
Wimpenny Claire,
Silva Fabiola Rodrigues Oliveira,
Miller Emily J.,
Scanes Elliot,
Spielman Derek,
Thomas Georgia,
Herbert Catherine A.
Publication year - 2020
Publication title -
wildlife biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.566
H-Index - 52
eISSN - 1903-220X
pISSN - 0909-6396
DOI - 10.2981/wlb.00692
Subject(s) - biology , abiotic component , wildlife , macropus , sexual maturity , population , wildlife management , ecology , range (aeronautics) , zoology , demography , marsupial , sociology , materials science , composite material
Reference intervals (RIs) describe baseline parameters of healthy animals, providing a powerful tool for wildlife managers to monitor health, identify disease and assess animal welfare. This paper reports haematological, glucose and serum protein RIs for one of Australia's most iconic and managed mammals, the eastern grey kangaroo Macropus giganteus . Blood samples (n = 514) were collected from 11 populations of eastern grey kangaroos, across much of their geographic range. A species‐level RI was initially established based on samples collected from four sites (n = 245) and was further partitioned based on significant differences associated with sexual maturity and season. Unique population means were established from a further seven sites to investigate the importance of biotic (sex and sexual maturity) and abiotic (season, site, rainfall, temperature and laboratory) factors on kangaroo health parameters. Random forest analysis of health parameters revealed that abiotic factors (site, rainfall, temperature and season) were largely responsible for differences in haematological, glucose and serum protein values. Sex was found to have no influence, while sexual maturity and laboratory of analysis had moderate effects. Based on these findings, interpretation of individual and population haematological and serum protein values requires careful consideration of the timing of sample collection, environmental conditions and sexual maturity. When assessing kangaroo health, the relevant sexual maturity RI must be considered initially. For populations with similarities to those described (for example high density or captive populations) users should also consider site specific mean haematological and serum protein values. The RIs reported are valuable when establishing the health status of kangaroo populations. Furthermore, understanding the influence of biotic and abiotic factors will improve the utility of these RIs to assess health, disease status and improve welfare in eastern grey kangaroos.