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  Juvenile growth rate as a measure of fitness in Daphnia

Lampert, W., & Trubetskova, I. (1996). Juvenile growth rate as a measure of fitness in Daphnia. Functional Eology, 10(5), 631-635.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-E2A7-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-E2A8-8
Genre: Journal Article

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Lampert_1996.pdf (Publisher version), 608KB
 
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 Creators:
Lampert, W.1, Author              
Trubetskova, I.1, Author              
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Free keywords: rate of increase; relative fitness; reproduction; r-g ratio; somatic growth
 Abstract: 1. An empirical relationship is established between the somatic juvenile growth rate (g) and the instantaneous rate of increase (r) in Daphnia magna in order to test if g can be used as a measure of fitness. Tested variables influencing g include food concentration, temperature, clonal differences and maternal effects. 2. The juvenile growth rate g was calculated for fixed time periods of 2 to 6 days (g(f)) or for the 'physiological' juvenile period to the deposition of the first clutch (g(j)), which varied with environmental conditions. Both g(f)and g(j) resulted in linear relationships between g and r when food concentration was the only variable. If the other variables were included then only g(j) resulted in a good fit. 3. Although the relationship may be slightly curvilinear, g(j) is a robust predictor of r. The ratio r: g(j) is not affected by juvenile size and size at maturation. Hence g(j), can be used as a relative measure of fitness in Daphnia. This can save considerable time and effort when determining reaction norms in life-table experiments with many genotypes

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Language(s): eng - English
 Dates: 1996-10
 Publication Status: Published in print
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 Identifiers: eDoc: 208183
Other: 1597/S 37122
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Title: Functional Eology
Source Genre: Journal
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Pages: - Volume / Issue: 10 (5) Sequence Number: - Start / End Page: 631 - 635 Identifier: ISSN: 0269-8463