| Main Title |
Variable Selectivity and the Role of Nutritional Quality in Food Selection by a Planktonic Rotifer. |
| Author |
Sierszen, M. E. ;
|
| CORP Author |
Wisconsin Univ.-Madison. Center for Limnology.;Environmental Research Lab.-Duluth, MN. |
| Publisher |
c1990 |
| Year Published |
1990 |
| Report Number |
EPA-R-812216-01; EPA/600/J-90/524; |
| Stock Number |
PB91-211417 |
| Additional Subjects |
Zooplankton ;
Food chains ;
Nutrition ;
Reproduction(Biology) ;
Seasonal variations ;
Algae ;
Field tests ;
Mortality ;
Chlamydomonas ;
Reprints ;
Rotifers ;
Keratella taurocephala ;
Merismopedia ;
Cryptomonas
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB91-211417 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
To investigate the potential for selective feeding to enhance fitness, the hypothesis that an herbivorous zooplankter selects those food items that best support its reproduction was tested. Under the hypothesis, growth and reproduction on selected food items should be higher than on less preferred items. The hypothesis is not supported. In situ selectivity by the rotifer Keratella taurocephala for Cryptomonas relative to Chlamydomonas goes through a seasonal cycle, in apparent response to fluctuating Cryptomonas populations. However, reproduction on a unialgal diet of Cryptomonas is consistently high and similar to that on Chlamydomonas. Oocystis, which also supports reproduction equivalent to that supported by Chlamydomonas, is sometimes rejected by K. taurocephala. In addition, K. taurocephala does not discriminate between Merismopedia and Chlamydomonas even though Merismopedia supports virtually no reproduction by the rotifer. Selection by K. taurocephala does not simply maximize the intake of food items that yield high reproduction. Selectivity is a complex, dynamic process, one function of which may be the exploitation of locally or seasonally abundant foods. |
| Supplementary Notes |
Pub. in OIKOS 59, p241-247 Jun 90. Sponsored by Environmental Research Lab.-Duluth, MN. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Variable Selectivity and the Role of Nutritional Quality in Food Selection by a Planktonic Rotifer. |
| Category Codes |
57H |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
124126926 |
| Origin |
NTIS |
| Type |
CAT |
