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Differential timing of larval starvation effects on filtration rate and growth in juvenile Crepidula onyx
Chiu, J.M.Y.; Wang, H.; Thiyagarajan, V.; Qian, P.Y. (2008). Differential timing of larval starvation effects on filtration rate and growth in juvenile Crepidula onyx. Mar. Biol. (Berl.) 154(1): 91-98. http://dx.doi.org/10.1007/s00227-007-0902-y
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793
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| Auteurs | | Top |
- Chiu, J.M.Y.
- Wang, H.
- Thiyagarajan, V.
- Qian, P.Y.
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| Abstract |
This study demonstrates that the timing of larval starvation did not only determine the larval quality (shell length, lipid content, and RNA:DNA ratio) and the juvenile performance (growth and filtration rates), but also determine how the latent effects of larval starvation were mediated in Crepidula onyx. The juveniles developed from larvae that had experienced starvation in the first two days of larval life had reduced growth and lower filtration rates than those developed from larvae that had not been starved. Lower filtration rates explained the observed latent effects of early larval starvation on reduced juvenile growth. Starvation late in larval life caused a reduction in shell length, lipid content, and RNA:DNA ratio of larvae at metamorphosis; juveniles developed from these larvae performed poorly in terms of growth in shell length and total organic carbon content because of “depletion of energy reserves” at metamorphosis. Results of this study indicate that even exposure to the same kind of larval stress (starvation) for the same period of time (2 days) can cause different juvenile responses through different mechanisms if larvae are exposed to the stress at different stages of the larval life. |
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