Fisheries and Aquaculture Centre, Institute for Marine and Antarctic Studies, University of Tasmania, Locked Bag 1370, Launceston, 7250, Tasmania, Australia.
Fisheries and Aquaculture Centre, Institute for Marine and Antarctic Studies, 15-21 Nubeena Crescent, Taroona, 7053, Tasmania, Australia.
Environ Pollut. 2020 Jan;256:113452. doi: 10.1016/j.envpol.2019.113452. Epub 2019 Oct 23.
Tasmanian recreational fishers have reported the presence of dark pigmentations in the usually white fillets of southern sand flathead (Platycephalus bassensis), a phenomenon known as muscle melanisation. Based on histology, it is suggested that eumelanin and pheomelanin are involved in the occurrence of the phenomenon. A gross melanisation scoring system was validated through a comparison with an image analysis technique, that quantified the percentage surface area of the fillets affected by muscle melanisation. The occurrence of muscle melanisation was most severe in fish inhabiting Deceitful Cove, Tamar Estuary. This indicated that muscle melanisation in P. bassensis may be caused by yet to be identified site specific factors. No significant relationships were evident between the percentage surface area of melanised muscle with condition index, age, sex, maturation stage, fish weight, fish length and size of melano-macrophage centres in the liver or spleen. Overall, this study has provided critical information that will frame the direction and focus of future P. bassensis muscle melanisation research.
塔斯马尼亚休闲渔民报告说，南方砂平鲷（Platycephalus bassensis）通常呈白色的鱼片上出现了暗色素沉着，这种现象被称为肌肉黑色素沉着。根据组织学，黑色素和真黑色素都参与了这一现象的发生。通过与图像分析技术的比较，验证了一种粗略的黑色素沉着评分系统，该系统量化了受肌肉黑色素沉着影响的鱼片表面积的百分比。在塔马尔河口的欺骗湾栖息的鱼类中，肌肉黑色素沉着最为严重。这表明，P. bassensis 的肌肉黑色素沉着可能是由尚未确定的特定地点因素引起的。肌肉黑色素沉着的百分比表面区域与条件指数、年龄、性别、成熟阶段、鱼体重、鱼长度以及肝脏或脾脏中黑色素巨噬细胞中心的大小之间没有明显的关系。总的来说，这项研究提供了关键信息，为未来 P. bassensis 肌肉黑色素沉着研究的方向和重点提供了框架。
