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1.


   
    Density dependent regulation of the reproduction cycle of Moina macrocopa (Cladocera) [Text] / Y. S. Zadereev, V. G. Gubanov ; ed.: JCV Klein, CV Klein, // BIODIVERSITY CRISIS AND CRUSTACEA. Ser. CRUSTACEAN ISSUES : A A BALKEMA PUBLISHERS, 2000. - Vol. 12: 4th International Crustacean Congress (JUL 20-24, 1998, AMSTERDAM, NETHERLANDS). - P535-541. - Cited References: 19 . - ISBN 0168-6356. - ISBN 90-5410-478-3
РУБ Fisheries
Рубрики:
DAPHNIA-PULEX
   ZOOPLANKTON

   MAGNA

Аннотация: The allelopathic effect of population density on gametogenesis induction of Moina macrocopa (Crustacea: Cladocera) was investigated at varying food concentration, photoperiod, and temperature. The presence of the non-trophic effect of population density on gametogenesis induction was demonstrated. The experiments with single females have shown that if the photoperiod, temperature, and food concentration are favorable for parthenogenesis, the crowding water has the effect of stimulating females into changing the reproduction mode. This effect was enhanced by using a higher density of the population to achieve crowding. The change of reproduction mode occurs in the experiments with populations of M. macrocopa with the achievement of food availability favorable for the parthenogenesis of single females. Chemical interactions between animals are the most obvious explanation for the obtained results.

Держатели документа:
Inst Biophys, Krasnoyarsk, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Zadereev, Y.S.; Gubanov, V.G.; Klein, JCV \ed.\; Klein,, CV \ed.\

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2.


   
    Chemical composition of water conditioned by crowded Moina macracopa (Crustacea : Cladocera) [Text] / G. S. Kalacheva [et al.] // Russ. J. Ecol. - 2000. - Vol. 31, Is. 2. - P. 113-117, DOI 10.1007/BF02828365. - Cited References: 25 . - ISSN 1067-4136
РУБ Ecology
Рубрики:
DAPHNIA-PULEX
   ZOOPLANKTON

   PARAMETERS

   INDUCTION

Кл.слова (ненормированные):
Cladocera -- metabolic products -- chemical analysis -- chemical composition
Аннотация: The chemical composition of water conditioned by colonies of Moina macrocopa and involved in the regulation of their life cycle was analyzed in comparison with water samples from natural water bodies. Dechlorinated tap water was used as the control medium. The results showed that metabolism of crustaceans leads to an increase in the concentrations of phosphorus and nitrogen in all forms, the appearance of protein and carbohydrate fractions, and changes in the composition of lipid fractions in the water conditioned by their colonies. The contents of all organic components are very low, which makes their identification difficult. Concentrations of substances identified in the conditioned water do not exceed those occurring in nature.

WOS
Держатели документа:
Russian Acad Sci, Siberian Div, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Kalacheva, G.S.; Zadereev, E.S.; Gubanov, V.G.; Gribovskaya, I.V.

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