NO sexual behaviour in newts
Article Abstract:
The concentration of nitric oxide synthase (NOS) in the brain determines the sexual behavior of male urodele crested newts but has no effect on female behavior. Sexually active males have a high NOS level while inactive males have a low NOS level. The NOS level increases during courtship, becomes maximum during deposition of spermatophore and then rapidly decreases. The level of NOS in males with un-receptive females is similar to that with receptive females but rapidly decreases. The NOS level in brains of females is similar in both receptive and non-receptive females.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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NO in hydra feeding response
Article Abstract:
Nitric oxide (NO) is involved in the regulation of the feeding response in the most primitive invertebrate with a nervous system, Hydra (phylum: Coelenterata). The feeding response is a complex behavioral response involving tentacle writhing and mouth opening, evoked by the outflow glutathione (GSH) from the prey itself when exposed to Hydra's nematocysts. The feeding response in Hydra starts a few seconds after GSH addition and reaches a peak within a few minutes before gradually disappearing in about 10 minutes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Extraocular magnetic compass in newts
Article Abstract:
Geomagnetic orientation is common among organisms although the process of magnetoreception has not been convincingly identified in any animal. A study has found that light-dependent magnetic orientation in the eastern red-spotted newt, Notophthalmus viridescens, is controlled by extraocular photoreceptors, perhaps sited in in the pineal complex or the hypothalamus.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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