北部湾主要经济鱼类鳞片性状研究

Study on Scale Character of Main Economic Fishes in Beibu Gulf

[目的]为北部湾鱼类年龄鉴定和渔业资源监测评估提供参考。[方法]对环北部湾拖网、流刺网、灯光围网3大作业类型4个季节的渔获物进行生物学采样,共采集17种具有年龄鉴定硬质的鳞片样本,经室外和室内处理,应用解剖镜和显微镜对其进行性状观察分析,并进行数码拍照研究。[结果]不同科属鱼类鳞片在鳞焦位置、前区栉节、鳞嵴形状和辐射沟数量等形态特征上有明显差异,其年轮标志也因遗传特性和环境因素而呈不同形态。[结论]鳞片可为鱼类分类和年龄鉴定提供科学依据,在北部湾鱼类生物学研究中具有重要作用。

[ Objective ] The study provided reference for Beibu Gulf fish age determination and fishery resources monitoring and assessment. [ Method] Catch samplings were taken with trawling, gilling and light attracting purse seining in four seasons around Beibu Gulf. A total of 17 pieces economic fish scales were studied. After removing, cleaning and drying, the scales were mounted and examined under dissecting microscope and microscope, then taken photos with CCD camera. [ Result] The fish scales of different families and genus showed various focus position, ridges , grooves number, annuli and basal area. The annual ring varied because of dissimilar heredity and environmental factors. [ Conclusion ] Scales provided scientific basis for fish classification and age determination, the study played important role in fisheries biology study in Beibu Gulf.