A STUDY OF FEEDING IN PREDACIOUS CILIATES USING PREY CILIATES LABELED WITH FLUORESCENT MICROSPHERES

被引:55
作者
DOLAN, JR
COATS, DW
机构
[1] Smithsonian Environmental Research Center, Edgewater, MD 21037
基金
美国国家科学基金会;
关键词
D O I
10.1093/plankt/13.3.609
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Feeding in predacious estuarine ciliates was investigated in a series of laboratory experiments using a new method of prey labeling which facilitates microscopic indentification of ingested prey items. Ingestion rates of Mesodinium pulex, Euplotes vannus and E. woodruffi were estimated using the appearance, inside the predator, of bacteriovorous ciliates (Metanophrys sp., Cyclidium sp. and Pleuronema sp.) labeled with fluorescent microspheres. Prey remain motile and have presumably unaltered surface characteristics. Ingestion rates of log-growth phase predators increased with prey density. Mesodinium pulex ingested 0.15-0.32 cells h-1 over a prey concentration of 60-2300 ml-1. Maximum ingestion rates of E. woodruffi and E. vannus were 4.5 and 3.4 cells h-1 respectively, estimated at prey abundances of 75 and 172 cells ml-1 respectively. Comparisons of feeding rates on prey of different sizes, and the effects of starvation, indicated that ingestion is likely limited by different factors in 'raptorial' (M. pulex) and 'filter feeding' (Euplotes spp.) predators.
引用
收藏
页码:609 / 627
页数:19
相关论文
共 56 条
[1]   FOOD VACUOLE MEMBRANE GROWTH WITH MICROTUBULE-ASSOCIATED MEMBRANE-TRANSPORT IN PARAMECIUM [J].
ALLEN, RD .
JOURNAL OF CELL BIOLOGY, 1974, 63 (03) :904-922
[2]   POPULATION-DYNAMICS AND TROPHIC COUPLING IN PELAGIC MICROORGANISMS IN EUTROPHIC COASTAL WATERS [J].
ANDERSEN, P ;
SORENSEN, HM .
MARINE ECOLOGY PROGRESS SERIES, 1986, 33 (02) :99-109
[3]   THE ROLE OF CILIATED PROTOZOA IN PELAGIC FRESH-WATER ECOSYSTEMS [J].
BEAVER, JR ;
CRISMAN, TL .
MICROBIAL ECOLOGY, 1989, 17 (02) :111-136
[4]   MICRO-ZOOPLANKTERS IN PLANKTON COMMUNITIES OF UPPER WATERS OF EASTERN TROPICAL PACIFIC [J].
BEERS, JR ;
STEWART, GL .
DEEP-SEA RESEARCH, 1971, 18 (09) :861-&
[5]  
BUSKEY EJ, 1988, B MAR SCI, V43, P783
[6]   FEEDING OF FIELD COLLECTED TINTINNID MICRO-ZOOPLANKTON ON NATURAL FOOD [J].
CAPRIULO, GM .
MARINE BIOLOGY, 1982, 71 (01) :73-86
[7]   A STUDY OF REPRODUCTION AND OTHER LIFE-CYCLE PHENOMENA IN PLANKTONIC PROTISTS USING AN ACRIDINE-ORANGE FLUORESCENCE TECHNIQUE [J].
COATS, DW ;
HEINBOKEL, JF .
MARINE BIOLOGY, 1982, 67 (01) :71-79
[8]  
CONOVER RJ, 1980, PRIMARY PRODUCTIVITY, P461
[9]   STUDIES ON GROWTH AND FEEDING OF TETRAHYMENA PYRIFORMIS IN AXENIC AND MONOXENIC CULTURE [J].
CURDS, CR ;
COCKBURN, A .
JOURNAL OF GENERAL MICROBIOLOGY, 1968, 54 :343-&
[10]  
Dragesco J., 1986, CILIES LIBRES AFRIQU