摘要
为了解雌、雄鲇Silurus asotus生长及其血液生理、生化成分的差异,采用人工饲养的同一批鲇,区分雌、雄后采集血样,对雌鲇和雄鲇在夏季(100日龄)、冬季(218日龄)的生长及血液变化特征进行了研究。结果表明:同一季节,雌、雄鲇间的体长与体质量有显著或极显著性差异(P<0.05或P<0.01),且同一时期雌鲇体长、体质量显著大于雄鲇(P<0.05);同一季节,雌、雄鲇间血液生理、生化成分差异不大,仅夏季时雄鲇血红蛋白含量、红细胞数量显著大于雌鲇(P<0.05),而其他测定指标,夏、冬两季雌、雄鲇间均无显著性差异(P>0.05);季节和性别双因素方差分析(Tow-way ANOVA)显示,性别仅对血红蛋白含量和红细胞数量有显著或极显著影响(P<0.05或P<0.01),季节对红细胞压积、血红蛋白含量、白细胞数量、谷丙转氨酶、谷草转氨酶、血糖含量、乳酸脱氢酶、甘油三酯含量均存在显著或极显著性影响(P<0.05或P<0.01),而时间和性别的交互作用对各指标均无显著性影响(P>0.05)。研究表明,鲇属于雌性具有优势生长的鱼类,季节对鲇血液生理、生化指标的影响大于性别间差异。
Characteristics of growth and changes in blood parameters were comparatively investigated in female and male farmed 100 day old(summer) and 218 day old(winter) catfish Silurus asotus collected from the same batch in summer and winter to understand the differences in growth, blood physiological indices and biochemical components between female and male catfish. The results showed that there were significant(P<0.05) or very significant(P<0.01) differences in body length and body weight between female and male catfish in the same season, with much longer body length and more body weight in the female than in the male in the same season, indicating that the female catfish are within the fish with dominant growth. In the same season, however, there was little difference in blood physiology and biochemistry between female and male. In summer, the male catfish had significantly higher hemoglobin concentration and more red blood cells than the female did(P<0.05), without significant difference in other indicators between female and male in summer and winter. The Two-way ANOVA of seasonal and gender factors revealed that significant(P<0.05) or very significant(P<0.01) effects of only gender on the count of red blood cells and hemoglobin content were observed, and that significant(P<0.05) or very significant(P<0.01) differences in erythrocyte pressure, and contents of hemoglobin, white cell count, triglyceride, and glucose, and activities of glutamic pyruvidase, glutamic transaminase, and lactate dehydrogenase were influenced by the season, without significant interaction effect of time and gender, indicating that the effect of the season on blood physiological and biochemical indicators was found to be greater than that of the gender.
引文
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