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Preliminary Prey Digestion in a Predacious Estuarine Ciliate and the Use of Digestion Data to Estimate Ingestion

John R. Dolan and D. Wayne Coats
Limnology and Oceanography
Vol. 36, No. 3 (May, 1991), pp. 558-565
Stable URL: http://www.jstor.org/stable/2837518
Page Count: 8
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Preliminary Prey Digestion in a Predacious Estuarine Ciliate and the Use of Digestion Data to Estimate Ingestion
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Abstract

Digestion of ciliate prey (Pleuronema sp. and Metanophrys sp.) in Euplotes woodruffi was examined in laboratory experiments. Similar exponential declines in recognizable food vacuole contents were found in feeding and nonfeeding cells. Ingestion rates, based on digestion rates and food vacuole contents, yielded estimates of 0.4-1.6 Pleuronema and 3.7-4.2 Metanophrys consumed per E. woodruffi $h^-1$ at $20^\circC$, in agreement with rates obtained by other methods. Cells starved for 24 h showed faster digestion rates; temperatures variation over range of $15\^circ-25!circC$ gave a $Q_10$ of $\thicksim 1.5$.

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