Exploring the most common lesion of Australian farmed saltwater crocodile (Crocodylus porosus) belly skin in the Northern Territory

Abstract

This is the first descriptive study to characterise and identify the most common lesions on harvested Australian saltwater crocodiles (Crocodylus porosus). 88 skins were examined over a 17-month period as part of normal farming practices, 2901 lesions identified, with scale location, location of the lesion on the scale, and characteristics (contour, keratin normality, translucency and colour) recorded. The study determined that linear lesions accounted for 68.25 % of lesions followed by foci lesions 17.24 %. Lesions were distributed on the upper proportion of the belly skin (77.8 %) and along the midline (72 %). The most common lesion identified was a single translucent linear lesion across the scale that otherwise appeared normal (58.95 %). While there is extensive research into pathogenic agents, further research is recommended to explore further causation of linear lesions, and factors that may contribute to their prevention. Given the subjective nature of crocodile skin grading, it is recommended future research into lesions is required to ensure the sustainability and profitability of the industry.