Pathological findings in wild harvested dugongs Dugong dugon of central Torres Strait, Australia

Woolford, L., Franklin, C., Whap, T., Loban, F. and Lanyon, J. M. (2015) Pathological findings in wild harvested dugongs Dugong dugon of central Torres Strait, Australia. Diseases of Aquatic Organisms, 113 2: 89-102. doi:10.3354/dao02825

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Author Woolford, L.
Franklin, C.
Whap, T.
Loban, F.
Lanyon, J. M.
Title Pathological findings in wild harvested dugongs Dugong dugon of central Torres Strait, Australia
Formatted title
Pathological findings in wild harvested dugongs Dugong dugon of central Torres Strait, Australia
Journal name Diseases of Aquatic Organisms   Check publisher's open access policy
ISSN 1616-1580
0177-5103
Publication date 2015-03-09
Year available 2015
Sub-type Article (original research)
DOI 10.3354/dao02825
Open Access Status Not Open Access
Volume 113
Issue 2
Start page 89
End page 102
Total pages 14
Place of publication Oldendorf, Germany
Publisher Inter-Research
Collection year 2016
Language eng
Formatted abstract
The dugong Dugong dugon is classified as Vulnerable to extinction but may be endangered in some regions. Cause of death in stranded dugongs has not been determined in a large proportion of animals examined, with investigations hindered by limited information on dugong health and diseases, and paucity of knowledge of common or endemic pathological findings. Here we describe pathological findings in harvested dugongs from the relatively pristine area of central Torres Strait, and we characterise lesions attributable to drowning. Other recorded lesions were mild and predominated by host reaction to the presence of trematodes within the gastrointestinal tracts, liver and pancreas. Ascarid worm burdens were low in comparison to dugongs from developed coastlines. Hepatocellular lipofuscin and ferritin pigmentation were commonly observed, more pronounced in livers of older animals and concurrent with periportal and bridging fibrosis. Lesions attributable to drowning included incomplete collapse of lungs, dorsal or diffuse pulmonary congestion, mild intra-alveolar haemorrhage and oedema, mild interstitial oedema and rupture of peripheral alveolar septae with acute myofibre fragmentation and degeneration. No accumulation of foam or aspiration of water or particulate matter was observed, suggesting that dugongs ‘dry drown’. Morphometric features of normal spleen are also presented. Characterisation of common pathological findings and those attributable to drowning in this species will aid in the interpretation of post mortem findings for the significant number of dugongs found deceased along urbanised coastlines.
Keyword Pathology
Sirenia
Necropsy
Drowning
Parasitology
Organs
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
 
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