Results 21 to 30 of about 272 (158)
Modeling and predicting meat yield and growth performance using morphological features of narrow-clawed crayfish with machine learning techniques [PDF]
Scientific ReportsIn recent studies, artificial intelligence and machine learning methods give higher accuracy than other prediction methods in large data sets with complex structures.
Yasemin Gültepe +2 more
doaj +2 more sources
Effect of chloride content in water on heart rate in narrow-clawed crayfish (Astacus leptodactylus) [PDF]
Knowledge and Management of Aquatic Ecosystems, 2009 A non-invasive method of recording cardiac activity was used to examine the impact of chloride level in water on narrow-clawed crayfish. This method permits one to record heart rate without any harm to the animal, and also locates changes in the shape ...
P. Kozák +5 more
doaj +3 more sources
Effects of methyl farnesoate injection on spermatozoa number and reproductive indices in the narrow-clawed crayfish Pontastacus leptodactylus [PDF]
Nauplius, 2022 In this study, the effect of methyl farnesoate (MF) injection on haemolymph MF levels, spermatozoa production and the reproductive indices of gonadosomatic index (GSI), testicular index (TI) and vasosomatic index (VSI) were investigated in males of ...
Mehmet Bal, Ayşe Gül Harlıoğlu
doaj +4 more sources
Farming of Indigenous Crayfish in Russia: A Mini-Review of Recent Studies [PDF]
AnimalsNatural populations of crayfish in Europe have experienced significant declines due to the spread of crayfish plague, overfishing, competition with invasive crayfish species, and habitat degradation.
Alexander G. Dvoretsky +1 more
doaj +2 more sources
Aquaculture Reports, 2022 In this study, the dietary effect of garlic powder (GP) as an herbal supplement on the growth performance, digestive enzymes, innate immunity, and antioxidant capacity of narrow-clawed crayfish, Postantacus leptodactylus, was investigated.
Omid Rezaei +2 more
exaly +3 more sources
Aquatic Living Resources, 2022 The narrow-clawed crayfish (Pontastacus leptodactylus) is one of the most ecologically and economically important freshwater species in Turkey. However, the harvest of this species has declined from 7937 t in 1984 to 696 t in 2019. One of primary reasons
Cilbiz Mehmet +2 more
doaj +5 more sources
Aquaculture Reports, 2019 The extrusion of spermatophores using electrical stimulation and dissection techniques from the vas deference was performed to test the feasibility of artificial insemination in Pontastacus leptodactylus.
Ardavan Farhadi +2 more
doaj +2 more sources
Recovering Turkish narrow clawed crayfish (Astacus leptodactylus) populations carry Aphanomyces astaci [PDF]
Knowledge and Management of Aquatic Ecosystems, 2012 Crayfish stocks collapsed in Turkey in mid 1980’s due to crayfish plague epidemics, with up to 25% survival in some cases. The collapsed stocks have then recovered slowly and commercial crayfish fishery was reinitiated gradually ...
Kokko H. +5 more
doaj +3 more sources
CONFIRMATION OF OCCURRENCE OF THE NARROW-CLAWED CRAYFISH ? STACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823 IN THE RIVER EVROS IN GREECE [PDF]
Knowledge and Management of Aquatic Ecosystems, 2007 The narrow-clawed crayfish Astacus leptodactylus Eschscholtz, 1823, is widely distributed in eastern European and western Asian countries. However, species presence in Greece was documented only by limited museum conserved specimens dating back to 1893 ...
PERDIKARIS C. +3 more
doaj +2 more sources
Agrology, 2020 Crayfish Astacus leptodactylus Eschscholtz, 1823 is one of the largest commercial invertebrate internal waters of Ukraine. At the present time producers are unable to meet the needs of the people in this food. The largest number of crayfish (over 90%) is
M. O. Panchishnyy +3 more
doaj +3 more sources