Critical thermal maxima and upper lethal temperatures for the calanoid copepods Acartia tonsa and A. clausi |
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Authors: | J G González |
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Institution: | (1) National Marine Water Quality Laboratory, Narragansett, Rhode Island, USA;(2) Department of Marine Science, University of Puerto Rico, 00708 Mayaguez, Puerto Rico |
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Abstract: | Determination of the critical thermal maxima and upper lethal temperatures for Acartia tonsa Dana and A. clausi Giesbrecht revealed the relative temperature tolerance of the two species. A. tonsa exhibited a wider range of acclimation temperatures compared to A. clausi. The response of A. tonsa is related to its ubiquity in Atlantic Ocean estuaries (temperate and tropical), and its capacity to live in temperate waters throughout most of the year. Differences between upper lethal temperatures and critical thermal maxima were very narrow for A. tonsa from tropical and subtropical areas. This suggests that, in warm climates, this copepod lives close to its upper lethal temperature limits.Based in part on a dissertation submitted in partial fulfillment for the Ph.D. degree at the University of Rhode Island. |
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