A new shell disease in the mud crab Scylla serrata from Port Curtis, Queensland (Australia)

Diseases of Aquatic Organisms

Leonie E. Andersen¹  John H. Norton¹  Naomi H. Levy¹ 

关键词: Shell disease;    Scylla serrata · Cuticle;    Crustacea;    Decapoda;    Mud crab;    Carapace;   

DOI  :  10.3354/dao043233

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: In 1994 a previously unreported rust spot shell disease was seen in mud crabs Scylla serrata‹Forskal from Port Curtis, central Queensland, Australia. Of 673 crabs surveyed, 21.7% had shell lesions. Of these, 82.9% had rust spot lesions onthe carapace. The majority of rust spot-affected crabs (78.8%) were female. Rust spot lesions were predominantly non-perforated (89.4%) and 54.8% were bilaterally symmetrical. There was also a gender difference in the areas of the carapace most commonlyaffected. The main histological features of the rust spot lesion included: a cavity in the upper endocuticle; indentation of the endocuticle below the cavity; remains of muscle attachment adhesive epithelium within the cavity; fibrous connective tissuebetween the damaged carapace and the attached muscle; and islands of endocuticle in this fibrous connective tissue. Histopathology of the internal organs failed to find evidence of an infectious or parasitic cause of the rust spot lesions. The cause(s) ofthe syndrome appear(s) to be non-infectious.

【 授权许可】

Unknown