Main Title |
Effects of temperature on growth and reproduction of aquatic snails / |
Author |
Van der Schalie, Henry, ;
van der Schali, Henry ;
Berr, Elmer G. ;
Moun, Donald I.
|
Other Authors |
|
CORP Author |
Michigan Univ., Ann Arbor. Museum of Zoology. |
Publisher |
Office of Research and Monitoring, U.S. Environmental Protection Agency [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], |
Year Published |
1973 |
Report Number |
EPA R373 021; EPA-18050-FOG |
Stock Number |
PB-221 549 |
Subjects |
Gastropoda--Physiology ;
Freshwater biology ;
Temperature--Physiological effect
|
Additional Subjects |
( Snails ;
Thermal stresses) ;
( Animal growth ;
Snails) ;
( Water pollution ;
Snails) ;
Reproduction(Biology) ;
Aquatic animals ;
Temperature measurement ;
Ponds ;
Lymnae stagnalis ;
Lymnae emarginata ;
Helisoma trivolvis ;
Helisoma anceps ;
Helisoma campanulatum ;
Physa gyrina ;
Thermal pollution ;
Water pollution effects(Animals)
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-221 549 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
xiii, 164 pages : illustrations ; 27 cm. |
Abstract |
The effects of temperature on the following freshwater snails were studied: Lymnaea stagnalis, L. emarginata, Helisoma trivolvis, H. anceps, H. campanulatum and Physa gyrina -- all pulmonate 'pond' snails; one gill-breathing operculate (Amnicola limosa); was also tested. Both growth and egg-laying were measured in temperatures ranging from 6 to 36C. Gonad development was determined through serial paraffin sections; reproduction was measured in terms of egg-laying. The lymnaeids grow best at 18C; egg production is better at 22C. In contrast, the planorbids grow better under warmer conditions (about 25C); however, when 30C is reached growth may appear better but reproduction is inhibited. (Modified author abstract) |
Notes |
"Contract no. 14-12-441. Project 18050 FOG." Includes bibliographical references (pages 157-164). Microfiche. |