几种赤潮藻对中华哲水蚤摄食、产卵和孵化的影响  

Effects of Red-tide Causative Algae on the Feeding Behavior,Egg Production and Egg Hatching of a Planktonic Copepod Calanus sinicus Brodsky

作　　者：高华[1] 高亚辉[1] 梁君荣[1] 

机构地区：[1]厦门大学生命科学学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2006年第4期553-557,共5页Journal of Xiamen University：Natural Science

基　　金：国家重点基础研究发展规划"973"项目(2001CB409701)

摘　　要：研究桡足类中华哲水蚤（Calanus sinicus Brodsky）对几种赤潮藻（假微型海链藻Thalassiosira pseudonana，威氏海链藻T．weissflogii，三角褐指藻Phaeodactylum tricornutum，锥状施氏藻Scrippsiella trochoidea，裸甲藻Gymnodinium sp．，东海原甲藻Prorocentrum donghaiense，塔玛亚历山大藻Alexandrium tamarense）的选择摄食以及赤潮藻对桡足类产卵率与孵化率的影响．结果表明，桡足类在混合食物中对个体小的藻类摄食率明显降低．在高浓度饵料条件下，桡足类对藻类的摄食模式与低浓度时不同，即滤食率与饵料藻细胞的大小成反比．桡足类在以威氏海链藻为饵料时，产卵率随藻类浓度的增加而上升（0．2～20．6ind·ind^-1·d^-1），而孵化率却随之下降（100％～70．9％）．以裸甲藻、东海原甲藻、塔玛亚历山大藻为饵料，桡足类仍能有较高的产卵率（分别为13．0、16．6和9．4ind·ind^-1·d^-1）．但喂食裸甲藻、塔玛亚历山大藻，其卵孵化率降低（分别为58．2％和79．8％）．The feeding behavior,egg production and egg hatching of Calanus sinicus Brodsky,a common planktonic copepod in coastal waters of China were investigated in the presence of several cultures of red-tide causative algae including Thalassiosira pseudonana , T. weissflogii , Phaeodactylum tricornutum , Scrippsiella trochoidea , Gymnodinium sp. , Prorocentrum donghaiense , and Alexandrium tamarense. When presented with a mixture of large-size and small-size food,Calanus sinicus avoided the small-slze food compared with in the mono-spieces feeding. When the copepods were exposed to a high algal concentration, the digestion rate had a negative relationship with the size of the food particle,which suggests a different feeding mode. The egg production increased （0.2- 20. 6 ind ·ind^-1·d^-1）with the cell concentration when fed with Thalassiosira weissflogii, while hatching rate decreased（100% 70.9 %）. The egg production reached a relative high level when fed with Gyrnnodiniurn sp. , Prorocentrurn donghaiense ,Alexandrium tamarense（13.0,16.6and 9.4 ind ·ind^-1·d^-1）. The hatching rate was low in the diet of Gymnodiniurn sp. and Alexandrium tamarense.

关 键 词：桡足类 硅藻 甲藻 选择摄食 产卵 孵化 

分 类 号：Q178.53[生物学—水生生物学]