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  • 1
    Electronic Resource
    Electronic Resource
    Regulation of ammonia (NH3-N) metabolism in the marine pulmonate, onchidium verruculatum. I. effects of a neuroendocrine centre on tissue ammonia levels (1980)
    Springer
    Hydrobiologia 68 (1980), S. 265-268 
    Details
    ISSN: 1573-5117
    Keywords: Ammonia ; nitrogen metabolism ; hormonal regulation ; Onchidium verruculatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Effect of ganglionic extirpations and replacement on the ammonia levels in the blood and various tissues of the marine pulmonate, O. verruculatum was studied. Three hrs after extirpation of the pleurovisceral (PV) complex only and not any other ganglia, revealed a significant (P 〈 0.001) decline in the blood and foot ammonia levels and significant (P 〈 0.001) increment in the hepatopancreatic ammonia level. However, no change was observed in the mantle and nephridial ammonia levels. Replacement of the PV complex, either via implantation of intact ganglia or boiled and unboiled homogenate administration (1 gn/animal) into the ganglionectomised group, restored ammonia levels in the blood and foot and showed significant (P 〈 0.005) decrease in hepatopancreatic ammonia levels. The results are discussed in the light of hormonal regulation of the nitrogen metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00018836
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hormonal control of egg-laying in the marine pulmonate, Onchidium verruculatum (1981)
    Springer
    Hydrobiologia 80 (1981), S. 277-281 
    Details
    ISSN: 1573-5117
    Keywords: Onchidium verruculatum ; hormonal control ; egg-laying ; left pleurovisceral ganglia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Extirpation of the pleurovisceral ganglia (PV) blocked egg-laying whereas reimplantation of PV or injection of a PV homogenate into PV-less animals restored the egg-laying capacity of the marine pulomonate, O. verruculatum. Injection of PV homogenate induced egg-laying in intact, mature individuals within 15–45 minutes. Boiling of the homogenate for 15 minutes did not abolish its egg-laying efficacy. However, after incubation with trypsin, a PV homogenate lost its potency. Homogenates of PV from colchicinized animals could not induce egg-laying in intact Onchidium. Similarly, colchicinized animals did not respond to a PV ectract from intact Onchidium. It is hypothesized that egg-laying in O. verruculatum is under the control of a heat-stable, trypsin sensitive hormone secreted by the PV ganglia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00018368
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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