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Eco‐physiology of Palaemonetes antennarius (Crustacea, Decapoda): the influence of temperature and salinity on cardiac frequency
Author(s) -
UNGHERESE GIUSEPPE,
BODDI VIERI,
UGOLINI ALBERTO
Publication year - 2008
Publication title -
physiological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 57
eISSN - 1365-3032
pISSN - 0307-6962
DOI - 10.1111/j.1365-3032.2008.00620.x
Subject(s) - salinity , biology , crustacean , shrimp , heart rate , temperature salinity diagrams , decapoda , saline , zoology , ecology , endocrinology , blood pressure
The effect of different temperatures and salinities on the cardiac frequency of the freshwater shrimp Palaemonetes antennarius is investigated. The results show that both temperature and salinity influence heart rate. Variations in water temperature are associated with changes in heart rate: variations higher than 8°C in 6 h affect not only heart rate, but also shrimp survival. After an initial rapid increase, the heart rate returns to initial values at saline concentrations of 15‰ and 30‰, whereas, at 20‰ salinity, the shrimps show a persistent decrease of heart rate throughout the test. The marked tolerance of variations of temperature and salinity suggests that P. antennarius is well adapted to waters with large salinity and temperature oscillations. Cardiac frequency can be used as a valid indicator of physiological stress in this species.