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- W2034147253 abstract "Experiments performed on seasonal collections of the pisidiids Sphaerium occidentale and Musculium securis from a temporary pond suggest that respiratory adaptations are related to the specific life histories of the two species. Sphaerium occidentale lives up to 3 yr and all age classes aestivate during dry periods, while M. securis lives for about 1 yr and only newborn aestivate. Both species are iteroparous and reproduce primarily in late spring and early summer. Oxygen uptake rates at field temperature and Q 10 values are low in both species during hibernation and aestivation, indicating respiratory stability and energy conservation. These rates and respiratory coefficients peak in spring during maximal growth and reproduction. Respiration in M. securis is more independent of temperature than in S. occidentale, reflecting the requirement of the former to complete growth and reproduction more quickly. Both animals show temperature acclimation patterns permitting early activity in spring and, thus, a more efficient exploitation of the short aquatic season. This pattern is more pronounced in the shorter lived M. securis. During aestivation, M. securis is a facultative anaerobe, while S. occidentale is an obligate aerobe. Neither species displays an oxygen debt following aestivation when immersed in water. Arousal from aestivation, as indicated by oxygen uptake, is delayed when clams are introduced to pond water. This apparently inhibits a premature resumption of activity and decreases the likelihood of desiccation in the natural habitat." @default.
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- W2034147253 date "1983-06-01" @default.
- W2034147253 modified "2023-10-18" @default.
- W2034147253 title "Respiratory Adaptations of the Fingernail Clams Sphaerium occidentale and Musculium securis to Ephemeral Habitats" @default.
- W2034147253 doi "https://doi.org/10.1139/f83-101" @default.
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