Effect of temperature on growth, mortality, reproduction, and production of adult Lymnaea obrussa Say (Mollusca:Gastropoda) Page: 3 of 37
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Studies involving field observation of natural populations and con-
comitant studies in she laboratory where conditions can be controlled
are vital to the understanding of the factors affecting production.1-5
One of the most important abiotic environmental factors is temperature.
Much work has been done measuring physiological rates at different tem-
peratures. Temperature in the field varies seasonally and diurnally,
however, and most laboratory-work has been carried out at constant tem-
perature. Recent work has shown that cycled temperature regimes do not
always affect physiological rates that are important in production mea-
surement in the same way as do constant temperatures;6-11 but no compari-
sons of production in constant or cycled temperatures have been carried
out, even though results of these comparisons are important for predic-
tion of the environmental impact of thermal effluents. The present work
was carried out to compare the production of the snail Lymnaea obrussa
Say exposed to natural temperature variation (diurnal and seasonal) with
that of snails exposed to seasonal and constant temperature regimes in
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Mattice, J.S. Effect of temperature on growth, mortality, reproduction, and production of adult Lymnaea obrussa Say (Mollusca:Gastropoda), article, January 1, 1975; Tennessee. (digital.library.unt.edu/ark:/67531/metadc878762/m1/3/: accessed January 15, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.