Serotonin and dopamine have opposite effects on phototaxis in larvae of the bryozoan Bugula neritina.

From: The Biological Bulletin | Date: June 1, 1997| Author: Pires, Anthony; Woollacott, Robert M. | Copyright information

Adult colonies of the bryozoan Bugula neritina release short-term anenteric larvae that initially are strongly photopositive. Over the course of several hours larvae lose their initial photopositivity and either become photonegative or alternate between positive and negative phototaxis. We report that newly released photopositive larvae rapidly become photonegative upon exposure to [10.sup.-6]-[10.sup.-5] M serotonin or its metabolic precursor, 5-hydroxytryptophan. This behavior was not obser...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and journal articles from HighBeam Research

Attraction of larvae of the armyworm Spodoptera litura (Lepidoptera: Noctuidae) to coloured surfaces
European Journal of Entomology ; Key words. Armyworm, Spodoplera litura, visual attraction of larvae, colour Abstract. Attraction of first instar larvae of Spodoptera litura to different colours was studied to determine those that could be used as effective visual attractants for trapping the larvae during dispersal. The larvae
Palatability and chemical defense of marine invertebrate larvae.
Ecological Monographs ; INTRODUCTION Most marine invertebrates have complex life cycles consisting of a planktonic larval stage that settles to the benthos and metamorphoses into a more sedentary (often sessile) form. Some species produce large numbers of very small larvae that feed (=planktotrophy), grow, and develop
Sea gauge will plot drifting coral larvae
Honolulu Star - Bulletin ; Like tracking grains of sand, scientists are using high-tech devices to follow millions of microscopic coral larvae off the coast of Maui. And they'll be doing it in the dark. By mapping the nocturnal journeys of some of the tiniest of sea animals, researchers from the U.S. Geological Survey, the
Action spectrum for the photophobic response of Ciona intestinalis (ascidieacea, urochordata) larvae implicates retinal protein
Photochemistry and Photobiology ; ABSTRACT Ascidian tadpole larvae change swimming behavior during the course of development. The photic behavior of the larvae of Ciona intestinalis was monitored by a computerized cell-tracking system with a time resolution of 0.1 s. Newly hatched larvae swim at an average speed of 1.4 mm/s but
Settlement in flow: upstream exploration of substrata by weakly swimming larvae.
Ecology ; INTRODUCTION The behavior of dispersing propagules - juveniles or adults - upon reaching their preferred habitats may play an important role in determining the distribution of species. Most animal species can disperse and select new, favorable habitats as juveniles or adults. However, dispersion of