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Relative tolerance of cirripede larval stages to acute thermal shock: A laboratory study
Thiyagarajan, V.; Nancharaiah, Y.V.; Venugopalan, V.P.; Nair, K.V.K.; Subramoniam, T. (2000). Relative tolerance of cirripede larval stages to acute thermal shock: A laboratory study. J. Therm. Biol. 25(6): 451-457. http://dx.doi.org/10.1016/S0306-4565(00)00010-3
In: Journal of Thermal Biology. Elsevier: Oxford; New York. ISSN 0306-4565; e-ISSN 1879-0992
|  |
| Trefwoorden |
Amphibalanus reticulatus (Utinomi, 1967) [WoRMS]; Cypris Müller, 1776 [WoRMS]
Marien/Kust |
| Author keywords |
Acute thermal shock; Balanus reticulatus; Nauplii; Cypris; Barnacle; Larvae |
| Auteurs | | Top |
- Thiyagarajan, V.
- Nancharaiah, Y.V.
- Venugopalan, V.P.
|
- Nair, K.V.K.
- Subramoniam, T.
|
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| Abstract |
(1) Meroplankters drawn into once-through cooling circuits of coastal power plants are subjected to transient thermal stress. The effect of such acute thermal shock on the development of barnacle larvae was studied in the laboratory.(2) The response of the barnacle larvae (naupliar and cyprid stages) to elevated temperature was dependent on exposure time and their stage of development.(3) Among the stages tested, N-6 larvae showed maximum tolerance. Exposure to 37°C did not affect larval survival, but delayed development of N-2 larva to cypris by one day.(4) Exposure at 40°C delayed, hastened or did not affect the development time of N-2 and N-4 larvae through cypris, depending on exposure time.(5) Ten mins exposure at 43°C proved lethal to all larval stages with mortality ranging from 20 to 86%.(6) Development success of the surviving larvae, measured in terms of cypris yield, showed no significant difference from controls, at temperatures below 40°C.(7) Settlement activity was significantly affected in only those cyprid larvae which were exposed to 43°C for 10 min.(8) Results of the present study indicate that thermal stress experienced in the once-through cooling system does not have significant impact on survival and development of the barnacle larvae at temperatures of 37–40°C. |
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