The aim of this study was to investigate growth and reproduction of the noble crayfish (Astacus astacus L.) in polyculture with plant-feeding fish: grass carp (Ctenopharyngodon idella), and bighead carp (Aristhichthys nobilis) in crayfish ongrowing ponds system. For the first time this experiment was conducted in Simnas crayfish breeding farm (Alytus distr.) during 2002 summer and autumn seasons. The effects of plant-feeding fish on abundance of the aquatic macrophytes, crayfish survival, growth rate and reproduction in semi-intensive culture conditions were investigated. After this experiment we have found, that grass carp and bighead carp community effectively regulates quantity of aquatic macrophytes in small (80 m²) ponds system. Moreover plant feeding fish had no negative impacts on survival and growth of the noble crayfish, so it might be used in polyculture with crayfish for reducing aquatic vegetation in crayfish ongrowing pounds. To assess the reproduction efficiency of noble crayfish in semi-intensive culture conditions the number of mature and ready for reproduction females crayfish was identified. The research was carried out measuring the development level of cement glands.
| Identifer | oai:union.ndltd.org:LABT_ETD/oai:elaba.lt:LT-eLABa-0001:E.02~2004~D_20040629_132113-23835 |
| Date | 29 June 2004 |
| Creators | Antanavičiūtė-Maškevičienė, Inga |
| Contributors | Semaška, doc.Vytautas, Paškevičienė, doc.Dalia, Puplesis, prof.habil.dr.Rimantas, Mackevičienė, Guoda, Smaliukas, Domas, Noreika, Remigijus, Kenstavičienė, Palmyra, Vosylienė, dr. Zita, Vilnius Pedagogical University |
| Publisher | Lithuanian Academic Libraries Network (LABT), Vilnius Pedagogical University |
| Source Sets | Lithuanian ETD submission system |
| Language | Lithuanian |
| Detected Language | English |
| Type | Master thesis |
| Format | application/pdf |
| Source | http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2004~D_20040629_132113-23835 |
| Rights | Unrestricted |
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