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Journal of Biological Rhythms
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Regulation of Seasonal Reproduction in Mollusks

Nancy L. Wayne

Department of Physiology, UCLA School of Medicine, Los Angeles, CA 90095 USA

Understanding the physiological basis of environmental regulation of reproduction at the cellular level has been difficult or unfeasible in vertebrate species because of the highly complex and diffuse nature of vertebrate neuroendocrine systems. This is not the case with the simple nervous system of mollusks in which reproductive neuroendocrine cells are often readily identifiable in living tissue. Given that there are mollusks that are seasonal breeders, that the neuroendocrine cells controlling reproduction have been identified in several molluskan species, that these neurons are conducive to cell physiological analysis, and that basic features of cell biology have been highly conserved between mammals and mollusks, it seems that the mollusk would provide an excellent model system to investigate cell-physiological events that mediate effects of environmental signals on reproduction. The purpose of this review is to explore this idea in three species in which the topic of the neural basis of seasonal reproduction has been studied: the giant garden slug Limax maximus, the freshwater pond snail Lymnaea stagnalis, and the marine snail Aplysia californica.

Key Words: Aplysia • Limax • Lymnaea • pheromone • photoperiod

Journal of Biological Rhythms, Vol. 16, No. 4, 391-402 (2001)
DOI: 10.1177/074873001129002097
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