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Food web structure and energy flow in open water of ponds
1990
Korinek, V. (Karlova Univ., Prague (Czech Republic). Dept. of Parasitology and Hydrobiology)
Salmonids in the water source reservoirs [in Czechoslovakia] - their importance and food
1987
Hochman, I. (Ustav Rybarstva a Hydrobiologie, Bratislava (Czechoslovakia)) | Sukop, I.
Some relations among the fish stock, water quality and amount of natural food in ponds
1990
Prikryl, I. (Research Inst. of Fish Culture and Hydrobiology, Vodnany (Czech Republic))
An effect of irrigation and cultivation system on food chain in paddy water environment: A study on availability of stable isotope ratios approach to examine paddy water ecosystem
2005
Konagaya, S.(Ibaraki Univ., Ami (Japan)) | Kobayashi, H.
For the purpose of examining on role of irrigation and cultivation system to paddy ecosystem, we study species and number of Odonata larvae and analyze the stable isotope ratios of the Odonata larvae and the plankton/detritus in water of paddy fields and irrigation ponds. As a results, cultivation system clearly effects to composition of species and number of Odonata larvae. delta sup(13)C indicates that Orthetrum albistylum speciosum larvae and Coenagrionidae spp. larvae which are dominant species in paddy water, depend on specified food sources, each other. delta sup(15)N shows that the trophic level of Odonata larvae is higher than that of the plankton/detritus in paddy water. It is considered that analyze the stable isotope ratios application is effective to examine water ecosystem and food web in paddy.
显示更多 [+] 显示较少 [-]Young agriculturists [Christopher Cruz of Hagonoy, Bulacan and Ace Limpin of San Fernando City, Pampanga, Philippines] use Nova Pure PCM Agua [a product of Novatech Agri-Food Industries, bio-organic fertilizer] for lablab production
2008
Pablico, S.Ma.
Use of Brachionus plicatilis as a natural food and of reduced quantity of sea water in production of post larvae of the giant freshwater prawn
1986
Suharto, H.H. | Ismail, A.
This experiment was conducted as a factorial experiment to determine the effects of two factors as well as interaction of these on production of post larvae of the giant freshwater prawn. The first factor was type of food comprising two levels namely Brachionus plicatilis and Artemia salina, respectively, while the other was intervals of exchange of one fifth of the volume of culture media comprising two levels namely two and five days, respectively. Duration of the experiment was 42 days. Results of the experiment indicate that there were no significant difference among the effects of the two factors or interaction of the two on post larvae production of the prawn (P0.05). Average production ranging from 1660 to 2309.5 post larvae were recorded for the four treatment combinations.
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