Horizontal And Vertical Dencity Distribution of Platfarm and Cirripede Larvae Over an Inshore Rock Platform Off Northumberland

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Abstract
A fixed bottom net was used to study the relationship between the horizontal and vertical density distribution of polychaete and cirripede larvae over an inshore rock platform.Strong horizontal density distributions were obtained close to the bottom in many species from both groups, while the vertical samples showed larvae to be distributed towards the bottom both during the day and at night. It is suggested that the concentration of larvae within the slow-moving bottom water was responsible for the observed limited lateral larval dispersal.The results are discussed in relation to their bearing upon a number of problems within the field of meroplanktonic ecology.

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