Endoscopic observations of invertebrate larval ... - Inter Research
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Endoscopic observations of invertebrate larval ... - Inter Research
Despite these advantages, endo- scopic observations have not previously been used to study larval settlement processes. In this study, we used endoscopes to ...
MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser
1
Published June 1 1
Endoscopic observations of invertebrate larval substratum exploration and settlement Linda J. Walters*,Gilles Miron8*,Edwin Bourget GIROQ, Departement de Biologie, Universite Laval, Quebec, Quebec G1K 7P4,Canada
ABSTRACT: In the marine environment, competent larvae of sessile invertebrates are influenced by water flow and a variety of biological, chemical and physical cues. Most research has focused on how these biotic and abiotic factors influence where individual larvae ultimately settle. Much less is known about post-contact exploration prior to metamorphosis. This is, in part, due to limitations associated with directly observing small larvae (100 to 500 urn) in flowing seawater. A study was conducted in Beaufort, North Carolina, USA to understand how larvae of the barnacle Balanus amphitrite and the bryozoan Bugula neritina respond to a variety of flow rates (0, 1.3,6.1 and 8.3 cm s ' ) and surface types (clean, biofilmed, 1 and 2 wk fouled). Larval behavior was studied by means of endoscopy in a runningseawater chamber. Larval movements were observed at 30 frames s ' for individuals that remained in contact with surfaces from
