中华绒螯蟹"水瘪子"病的主要体征指标

中华绒螯蟹的"水瘪子"病是一种以肝胰腺发白萎缩为主的多症状疾病,本研究旨在评估"水瘪子"病的主要体征指标,为科研人员和临床工作者进一步规范诊断标准提供参考。通过采集江苏兴化和盐城健康或疑似"水瘪子"病的中华绒螯蟹样本,测量评定了11个体征指标并进行了系统聚类、主成分回归以及多重对应分析。通过分析共获得"水瘪子"病的5个体征指标,并评估了"水瘪子"病的5个症状变化,分别为活力差,遇应激时无逃跑、爬动等运动现象;较低壳硬度,剥离头胸甲时头胸甲部分区域破碎;步足肌肉萎缩,可能出现积水;肝胰腺呈淡黄、白或灰白色;肝胰腺指数低(2%～9%)。同时,分析结果显示,体质量降低、鳃和肝胰腺颜色加深等一些症状表现与"水瘪子"病的常规症状无明显相关。研究表明,活力、壳硬度、肌肉饱满度、肝胰腺颜色和肝胰腺指数等指标可能成为"水瘪子"病评估中的主要体征指标。

Evaluation of the leading physical indicators of hepatopancreatic necrosis disease of Chinese mitten crab (Eriocheir sinensis)

Hepatopancreatic necrosis disease (HPND) of Eriocheir sinensis is a multi-symptomatic disease, characterized by white color and atrophy of hepatopancreas. This study aims to evaluate the main symptoms of HPND, hoping for provide a reference for researchers and clinicians to further unite the diagnosis. In this study we collected 11 individual indicators of E. sinensis in health or suspected HPND in criteria Xinghua and Yancheng Cities, Jiangsu Province. Systematic cluster analysis, principal component regression, and multiple correspondence analysis were conducted in this study. Our study dertermined calculated five leading indicators of HPND, including vitality, shell hardness, muscle fullness, hepatopancreas color, and hepatopancreas index. Further, the symptoms were evaluated as poor vitality, lower shell hardness, atrophy and effusion of pereiopoda, the pale yellow of hepatopancreas color, and the low hepatopancreas index (2%-9%). Besides, the analysis showed that the reduction of body weight, and the darkness of hepatopancreas color and gill color might not be related to the typical symptoms of HPND. The results showed five indicators, i.e. vitality, shell hardness, muscle fullness, hepatopancreas color and index, might be the leading indicators in the disease assessment of HPND.