摘要
在 1992~1993年度南极夏季期间,用肠道荧光法现场测定大磷虾(Eu- phausia superba Dana)的肠道排空率和肠道内含物色素水平,并据此计算自然状况下 大磷虾的摄食率。大磷虾的肠道排空率为0.43/h。次成体(平均体重为168.8mg干 重)和成体(平均体重为 274.3mg干重)的摄食率分别为 180.6±19.2和 464.4± 28.3ng叶绿素a/h。自然状况下大磷虾的摄食率与现场测定的 100m以上水层平均 叶绿素a浓度的相关性不大。
During the austral summer of 1992-1993, the gut evacuation rate and ingestion rate of Antarctic krill, Euphausia superba Dana, were measured on board the ship R/V JiDi in the Southern Scotia Sea and Prydz Bay region, Antarctica. Pigments level of gut content (Gt) of krill declined exponentialy against time (t) when krill were incubated in filtered seawater which expressed by the formula Gt= 3. 7ie-0. 427t, (R= 0. 967 ). The evacuation rate T = 0. 427h-l, and the gut passage time T= 1/r = 2. 34h. Ingestion rates of sub-adult krill (mean 1 68. 8 mg dry weight) ranged from 35. 4 to 902. 0 ng chl a. h-1 with average of 180. 6. That of adult krill (mean 274. 3 mg dry weight) were 36. 0-3 040. 3 ng chl a. h-l (average of 464. 4). Ingestion rate did not increase with the increase of ambient chlorophyll a concentration.
出处
《海洋科学》
CAS
CSCD
北大核心
1995年第3期31-34,共4页
Marine Sciences
关键词
肠道荧光法
肠道排空率
摄食率
大磷虾
虾
Gut fluorescence method, Evacuation rate, Ingestion rate, Asphausia superba, Antarctica