Free Content Effects of temperature on gastric evacuation rates in Sepia officinalis (Linnaeus, 1758) in laboratory conditions

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Abstract:

In this study, the gastric evacuation rates of cuttlefish (Sepia officinalis), fed a single meal of shrimp, Paleomonetes varians, were measured in the laboratory at four temperatures (15.5, 18, 21 and 23°C). Linear, square root, and exponential models were fitted to the percentage of the original meal remaining (ash free dry weight). The square-root model gave the best fit for experiments performed at 15.5°C and 18°C, whereas the exponential model gave the best fit for experiments carried out at 23°C. The square-root model showed an increase in the amount of food remaining after the fifth hour in all four experiments. There was a significant difference in gastric evacuation rates between the temperatures tested. Gastric evacuation rates were higher at higher temperatures (0.442 h−1 at 23°C) in comparison with lower temperatures (0.198 h−1 at 15.5°C, 0.212 h−1 at 18°C, and 0.323 h−1 at 21°C). Significant differences in gastric evacuation rates between size and maturation stage have been calculated for experiments performed at 23°C.

Document Type: Research Article

Publication date: September 1, 2002

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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