摘要
为探究温度对海燕(Asterina pectinifera)摄食、消化和呼吸生理的影响,本研究选取小(3~4 cm)、中(4~5 cm)、大(5~6 cm)三个规格组的个体,在15℃、20℃和25℃三个温度梯度下开展室内受控实验,测定其摄食量、摄食率、耗氧率和消化酶活性等关键生理指标。结果表明:所有温度组均未出现死亡现象;20℃条件下各规格组摄食量显著高于15℃和10℃组(P<0.05),且表现出明显的昼夜摄食节律(白天摄食率显著低于夜间);25℃组的耗氧率显著升高(P<0.05),且同温度下个体耗氧率随规格增大而递减;消化酶活性无显著温度依赖性(P>0.05)。综合表明,15~20℃为海燕的最适摄食温度区间。针对底播养殖海区,建议加强该物种的清除管理以降低生态风险。
To investigate the effects of temperature on the feeding,digestion,and respiratory physiology of the starfish Asterina pectinifera,this study conducted controlled laboratory experiments using three size groups(small:3~4 cm;medium:4~5 cm;large:5~6 cm in diameter)under three temperature gradients(15℃,20℃,and 25℃).Key physiological parameters,including food intake,feeding rate,oxygen consumption rate,and digestive enzyme activity,were measured.Results showed that:No mortality was observed in any temperature group;At 20℃,all size groups exhibited significantly higher food intake compared to 15℃and 10℃groups(P<0.05),with a distinct diurnal feeding rhythm(daytime feeding rates were significantly lower than nighttime rates);The 25℃group showed significantly elevated oxygen consumption rates(P<0.05),while within each temperature group,larger individuals progressively decreased their oxygen demand;No significant temperature-dependent effects were detected in digestive enzyme activity(P>0.05).These findings indicate that 15~20℃represents the optimal temperature range for A.pectinifera feeding.For seabed-cultivated areas,enhanced management strategies to remove this species are recommended to mitigate potential ecological risks.
作者
张玮嘉
王诗萌
田涛
于晓明
吴忠鑫
李青霞
ZHANG Weijia;WANG Shimeng;TIAN Tao;YU Xiaoming;WU Zhongxin;LI Qingxia(Liaoning Marine Ranch Engineering Technology Research Center,Dalian Ocean University,Dalian 116023,China;Marine Ranch Industry Research Institute,Dalian Ocean University,Dalian 116023,China;Key Laboratory of Education Department for Facilities Fisheries,Dalian 116023,China)
基金
大连市科技创新基金(2021JJ11CG001)。
