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Corbicula Fluminea Clam Lab Report

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The Distinctive Feeding Adaptations Between
The Corbicula fluminea and Unioidean Clam

Jimena Cárcamo

Lab 10
Concepts in Biology 173 C
November 21, 2014

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In Graph 1.1 shows that the Asiatic has a higher filtration than the native in the algae concentration. In the first 5 minutes in the algae, the Asiatic clam filtered 0.045 abs/g more than the Native clam. By 10 minutes, the Asiatic clam filtered 0.05 abs/g more than the native, and by 20 minutes the Asiatic clam filtered 0.03221 abs/g more than the Native. These results indicate that the Asiatic has a higher filtration than the Native clam. Similarly, the Asiatic also had a higher filtration rate in the bacteria than the Native clams. The Asiatic clam has a 0.06-abs/g-filtration advantage in the bacteria. Graph 2.2 shows that the Asiatic continues to have greater filtration in the bacteria concentration as it did in the algae concentration. Figure 1.1 and 1.2 shows the cirri spacing of the Asiatic and Native clam. The cirri spacing of the Asiatic clam was 2.1 microns between cirri, and the native clam was 3.0 microns between cirri seen in the magnification of …show more content…

The Corbicula fluminea filtered more in both the algae and the bacteria, than the Unioidean. The data demonstrates that the Asiatic clam not only filtered more, which causes to have a much more higher concentration rate of algae and bacteria. The Corbicula fluminea has a higher metabolic rate is likely to achieve a higher filtration, assimilation and growth rates than other unionoideans (McMahon 1999). This explains why there was a much more higher filtration rate between the asitatic and the native clam. “Asian clam is primarily a filter feeder and uses deposit feeding to supplement its diet when food resources are scarce or particle size limits filter feeding efficiency” (Boltovskoy et al. 1995, Way et al. 1990, Hakenkamp et al. 2001). The high metabolism and the diet of the Asiatic clams explain why the Asiatic clam had a much more higher filtration rate than the native

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