Biol. Bull. Sign up for etocs!
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Biol Bull 81: 221-234. (October 1941)
© 1941 Marine Biological Laboratory
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by CLAFF, C. L.
Right arrow Articles by KIDDER, G. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by CLAFF, C. L.
Right arrow Articles by KIDDER, G. W.

FEEDING MECHANISMS AND NUTRITION IN THREE SPECIES OF BRESSLAUA

C. LLOYD CLAFF 1, VIRGINIA C. DEWEY 1, and G. W. KIDDER 1

1 From the Arnold Biological Laboratory, Brown University, and the Marine Biological Laboratory, Woods Hole, Massachusetts

1. Three species of Bresslaua, B. vorax Kahl, B. insidiatrix sp. nov. and B. sicaria sp. nov. are described.

2. These ciliates are carnivorous and feed on other small ciliates, members of the genus Colpoda being especially favorable as food.

3. Using indicator dyes it was found that the prey is killed simultaneously with a sudden release of an acid into the newly-formed food vacuole. The hydrogen ion concentration of the vacuole fluid was estimated to be between pH 3.0 and pH 4.2. This range includes the death point of various species of Colpoda. During digestion the protoplasm of the prey becomes alkaline. The undigested residue becomes acid before defecation.

4. Bacteria-free Bresslaua were tested with a number of food organisms and a preliminary survey of their food requirements recorded.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1941 by the Marine Biological Laboratory.