| 摘要: |
| 于1998年1—6月,在中国科学院海洋研究所实验室内采用静水方法对采自胶州湾潮间带的菲律宾蛤仔(以下简称蛤仔)进行摄食率、清滤率和吸收率的测定。结果表明:(1)蛤仔摄食率和清滤率随着个体体重的增加而增大,而单位重量的摄食率和清滤率随个体体重的增加而减小,它们之间呈幂函数关系。(2)底质对蛤仔摄食生理影响的实验表明:铺砂可以显著地提高蛤仔的摄食生理指标。(3)在一定的饵料浓度范围内,摄食率和清滤率随着浓度的增加而增大,呈幂函数关系。当饵料浓度达到一定值后,清滤率迅速下降,而摄食率只略微有所下降,基本上保持平稳不变。这说明蛤仔可以通过调节清滤率来稳定摄食率。(4)蛤仔吸收率和饵料浓度及个体大小无明显相关性。(5)水温15℃,投喂小球藻的条件下,实验结果显示蛤仔[壳长(3.53±0.02)cm、软体部干重(0.41±0.02)g]产生假粪的阈值为2.16mgPOM/L。 |
| 关键词: 菲律宾蛤仔 清滤率 摄食率 吸收率 |
| DOI：10.11693/hyhz200006008008 |
| 分类号: |
| 基金项目:国家“九五”攻关资助项目，96-922-02-03号 |
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| ENVIRONMENTAL FACTORS AFFECTING THE FEEDING PHYSIOLOGICAL ECOLOGY OF MANILA CLAM, RUDITAPES PHILIPPINARUM (ADAMS ET REEVE, 1850) |
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DONG Bo, XUE Qin-zhao, LI Jun
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Institute of Oceanology,The Chinese Academy of Sciences,Qingdao,266071
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| Abstract: |
| Feeding physiological traits (ingestion rate IR, clearance rate CR and absorption efficiency AE) of Manila clam, Ruditapes philippinarum, were studied within laboratory in static system. The results obtained are as follows.(1) Relationships between IR, CR and body size were expressed as: IR=0.98W0.56 (R2=0.97); CR=0.47W0.63 (R2=0.90). (2) IR, CR and AE of Ruditapes philippinarum in sand substrate were significantly higher than those in the environment without sand substrate (ANOVA, p<0.05). (3) CR increased with higher concentrations of diet but decreased sharply if the concentration exceeded a definite value (7.31±1.36) mgPOM/L. IR has the same trend as CR but decreased smoothly after exceeding the definite value (8.79±0.24) mgPOM/L. This indicates that Manila clam possesses the inherent ability of regulating ingestion and clearance rates responding to the external diet conditions. (4) Diet concentrations and body size had no significant effect no AE. (5) The threshold concentration of diet leading to pseudofeces production in Manila clam shell length (3.53±0.02)cm; dry tissue weight (0.41±0.02)g was around 2.16 mgPOM/L. |
| Key words: Ruditapes philippinarum, Clearance rate, Ingestion rate, Absorption efficiency |
