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Free Content Growth Rates of Modiolus Americanus (Leach) in Relation to Mechanical Disturbance and Darkness

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The shell length increment of Modiolus americanus (Leach) from Discovery Bay, Jamaica, was measured during November 1974-January 1975 with a nondestructive optical method, LASER diffraction. Mussels hanging freely in the water where they were disturbed by wave action did not grow significantly, while mussels growing in a fixed position in indoor aquaria with normal day-night rhythm, had an average growth rate of 0.27 μm/day. When mussels in the same fixed position were kept in darkened aquaria the growth was significantly larger, in average 0.61 μm/day. There is a pronounced individual variation in growth rates with coefficient of variation ranging from 31 to 60%.

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Document Type: Research Article

Publication date: 1976-07-01

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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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