Journal
AQUATIC INVASIONS
Volume 6, Issue 2, Pages 141-147Publisher
REGIONAL EURO-ASIAN BIOLOGICAL INVASIONS CENTRE-REABIC
DOI: 10.3391/ai.2011.6.2.03
Keywords
Carrying capacity; Dreissena rostriformis bugensis; Ineze Model; Lake Mead; quagga mussel
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Estimation of carrying capacity for bivalves is generally carried out for mussel culture systems wherein maximizing mussel numbers requires the consideration of both ecological and economic endpoints. We adapted an existing culture-system model to estimate potential carrying capacity of an invasive species, the quagga mussel (Dreissena rostriformis bugensis) in the Boulder Basin of Lake Mead, Nevada. We parameterized the model using both field measurements and known quantities previously published in the literature. To make this model most useful to ecologists and managers, we provide a detailed description and derivation, as well as an example calculation for the model. The model is based on mean Chlorophyll a concentrations in the Boulder Basin of Lake Mead, and the number of quagga mussels needed to filter a given reduction in food particles from the water column. Estimates ranged from a total of 1.51 x 10(12) mussels with a net reduction of 50% of food particles to 1.02 x 10(13) mussels when the net reduction was at the threshold level of survival (0.017 mu g/L). Limitations to the model and potential environmental and ecological considerations are discussed.
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