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Full-Text Articles in Life Sciences
Pre- And Postnatal Development Of Gaba Receptors In Macaca Monkey Visual Cortex, C. Shaw, L. Cameron, D. March, M. Cynader, Barbara Zielinski, A. Hendrickson
Pre- And Postnatal Development Of Gaba Receptors In Macaca Monkey Visual Cortex, C. Shaw, L. Cameron, D. March, M. Cynader, Barbara Zielinski, A. Hendrickson
Biological Sciences Publications
GABA is a putative inhibitory neurotransmitter in adult mammalian visual cortex but also has been implicated as playing a crucial role in cortical information processing during development. In order to understand better the role of GABA during primate visual cortex development, we have examined the time course of GABAA and GABAB receptor ontogenesis in 18 Macaca nemestrina monkeys ranging from fetal day 61 (F61d) to adulthood. The GABA and benzodiazepine binding sites of the GABAA receptor were detected by 3H-muscimol (3H-MS) and 3H- flunitrazepam (3H-FZ), respectively. GABAB receptors were detected by 3H-baclofen (3H-BA). All ligands were visualized by in vitro …
Ingestion Of Small-Bodied Zooplankton By Zebra Mussels (Dreissena Polymorpha): Can Cannibalism On Larvae Influence Population Dynamics?, Hugh J. Maclsaac, W. Gary Sprules, J. H. Leach
Ingestion Of Small-Bodied Zooplankton By Zebra Mussels (Dreissena Polymorpha): Can Cannibalism On Larvae Influence Population Dynamics?, Hugh J. Maclsaac, W. Gary Sprules, J. H. Leach
Biological Sciences Publications
The zebra mussel Dreissena polymorpha established populations in western Lake Erie in 1986 and achieved densities exceeding 3.4 × 105 individuals∙m−2 during 1990. We assessed apparently incidental predation on Lake Erie and Erindale Pond zooplankton by adult mussels. Dreissena larvae and small rotifers (Polyarthra spp., Keratella spp., Trichocerca) sustained moderate to high predatory mortality whereas larger taxa (Bosmina, Scapholeberis) were invulnerable to predation. Larval Dreissena almost always sustain > 99% mortality in European lakes. While mortality has been ascribed primarily to lack of suitable settling substrate and unfavourable environmental conditions, it may be confounded by larval predation by adults. We demonstrate …