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Heat production rate of the Baltic amphipod Gammarus oceanicus at varying salinities
Normant, M.; Schmolz, E.; Lamprecht, I. (2004). Heat production rate of the Baltic amphipod Gammarus oceanicus at varying salinities. Thermochim. Acta 415: 135-139. https://dx.doi.org/10.1016/j.tca.2003.06.007
In: Thermochimica Acta. Elsevier: Amsterdam; London; New York; Tokyo. ISSN 0040-6031; e-ISSN 1872-762X, meer
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  • Normant, M., meer
  • Schmolz, E.
  • Lamprecht, I.
Abstract
    The heat production rate of Gammarus oceanicus, a species of marine origin living in the brackishwaters (7 psu (practical salinity units)),wasexamined by direct calorimetry after acclimation to salinities of 5, 7, 14, 20 and 30 psu (at 10 °C). The mean heat dissipationwas greatest at 5 psuwith 5.64±1.60 J h−1 g−1 ww (wet weight) and decreased significantly (P < 0.05) with increasing salinity down to 2.26±1.14 J h−1 g−1 wwat 30 psu. The high inter-individual variability was of significance for the obtained results. When salinity dropped by only 2 psu from thecontrol (7 psu) the mean heat production rate raised by 18%. A salinity increase from 7 to 30 psu caused a reduction in the average metabolicrate of G. oceanicus by 53%. That means that G. oceanicus requires more energy for osmotic adjustment at lower salinities.
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