In recent studies, artificial intelligence and machine learning methods give higher accuracy than other prediction in large data sets with complex structures. Instead of statistical methods, intelligence, are used due to the difficulty constructing mathematical models multi-parameter multivariate problems. this study, predictions length-weight relationships meat productivity were generated by using measurement male female crayfish narrow-clawed population living Apolyont Lake. The set was...

This study was conducted in Dardanelles between October 2007 and August 2009 when condition index, meat yield, biochemical compositions environmental parameters of seawater were investigated the area found to have available conditions for cultivation. Investigation showed a positive correlation particular among seasonal variation temperature, protein, fat chlorophyll-a; negative seen them carbohydrate value. It clear from two years that most ideal period oyster harvest is April especially...

This study aims to develop an artificial neural network (ANN) estimate the growth model of narrow-clawed crayfish (Pontastacus leptodactylus). A total 546 (255 males and 291 females) individuals were collected monthly between July 2007 June 2008 by using fyke nets (34 mm mesh size) from Yenice Reservoir, Çanakkale, Türkiye. Total length (TL) weight (TW) measured, relationship TL TW was modeled both traditional length-weight (LWR) ANN approaches. The performance models evaluated, developed in...

Studies were carried out to evaluate the reproductive efficiency of narrow-clawed crayfish, Astacus leptodactylus Eschscholtz, 1823, in three different populations lakes Apolyont, Iznik, and Manyas Turkey. Crayfish sampled monthly using fyke-nets 34 mm mesh size from April 2002 until March 2003. The average number pleopodal eggs (with their range), per female, was 200 ± 12 (8-556) Lake 202 13 (6-350) 257 (18-465) Manyas. ovarian 348 20 (126-630) 305 11 (162-465) 400 18 (205-776) egg diameter...

In this study, the relationships between length-weight, and meat yield of freshwater crayfish (Astacus leptodactylus) in Apolyont Lake were investigated. For aim, 1416 (573 female, 843 male) caught April 2002 March 2003. Sex ratios population calculated as 0.68/1.0. Carapace length total weight determined 23-71 mm (23-70 28-71 2.5-92.4 g (2.5-72.4 2.5-92.4g male), respectively. respects to carapace length-total results regression negative allometric growth found female but isometric was male...

Abstract The present study aimed to evaluate the effects of poly‐β‐hydroxybutyrate (PHB)‐supplemented diets for rainbow trout ( Oncorhynchus mykiss ) fingerlings. For this purpose, three experimental were prepared contain 0, 2, and 5% PHB; each diet was tested in a completely randomized design 60 days quadruple groups 22 fish per tank. results showed that inclusion PHB did not affect growth parameters such as mean weight gain, specific rate, feed conversion ratio among treatments. There also...

The objective of this study was to determine whether the freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) rearing can be economically achieved in rice fields using meta-analysis.For purpose, 100 juvenile crayfishes were settled each three cages field and survival growth characteristics evaluated for 68 days.The meta-analysis performed present nineteen studies where researchers crayfish.As a result, initial average length weight individuals 11.08±0.097mm 0.04±0.003g,...

The zebra mussel, Dreissena polymorpha (Pallas, 1771) is considered as a harmful invasive epibiont species for hydroelectric and nuclear power plants it reduces or blocks water flow in the plant systems. Although D. reported that cleans water, increases visibility, filters out pollutants, has likewise negative impacts on population size of some fish aquatic species. In present study, mussels were observed first time. On narrow-clawed crayfish living sources Turkey. Specimens collected from...

Two individuals of Pontastacus leptodactylus (Eschscholtz, 1823) were collected from Atikhisar Reservoir in Çanakkale, Turkey. The caught by using a fyke-net. fyke-nets after 3-days soaking time the reservoir on 18 July 2020. sampling was carried out during daytime. sediment location had muddy substrate. Both blue colored crayfish (Pontastacus leptodactylus) female. Blue color anomaly observed all parts bodies both individuals. Morphometric characteristics measured and total lengths 104.83...

This study was carried out to investigate relationships between some morphological and reproductive traits of the Turkish crayfish, A. leptodactylus, collected from a controlled irrigation lake in Yenice province (Çanakkale, Turkey), July 2007 June 2008. For this objective, two multivariate analysis techniques, namely canonical correlation multiple linear regression analysis, were used. The results have shown that may be used predict changes traits. instance, suggested egg weight number eggs...

The Russian sturgeon (Acipenser gueldenstaedtii) species is in high demand owing to its valuable caviar. Therefore, it danger of extinction. Since the reaches sexual maturity late life cycle, this has a economic cost for farmers. However, can be reduced with an environmentally friendly system called biofloc technology. This study compared growth performance and health indicators groups using different carbon sources such as starch (BS), molasses (BM) dextrose (BD). In 60-day study, fish...

The present study investigated the length-weight relationships and meat yield of narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823), in Kocahıdır Irrigation Reservoir. Between July 2015 June 2016, a total 653 individuals (255 females 398 males) were sampled, their carapace lengths (CL), (TL), weights (TW) measured. female-to-male ratio for entire population was found to be 0.64:1.00. results showed that CL crayfish ranged between 37 90 mm (39-79 37-90 males), while TW from...

Bu çalışma ile kontrollü ortamda çeltik–kerevit polikültür yetiştiriciliğinde ideal stok oranlarının belirlenmesi amaçlanmıştır. kapsamda, çeltik tarımı yapılan alanların tarla balıkçılığı açısından değerlendirilmesi için yumurtalı dişi tatlısu ıstakozlarından laboratuvar ortamında temin edilen yavru bireyler ekili alanlara farklı oranlarında (25 birey m2, 50 m-2 ve 100 m-2) yerleştirilmiştir. Araştırma sonunda ıstakozu yavruları hayatta kalma (%72) boy ağırlık yönünden en iyi büyümenin 25...

A female albino crayfish Pontastacus leptodactylus (Eschscholtz, 1823) was captured from Atikhisar Reservoir in Çanakkale, Turkey on July 18, 2020. The is lacked melanin that normally found normal crayfish. compound eyes of the were black as Morphometric characteristics measured and total length 101.98 mm, carapace 50.04 width 26.56 mm weight 35.90 g. Albinism a widespread disorder animal kingdom triggered by absence skin, eyes, or hair. Investigation albinism has commonly focused mice...

Abstract Metabolic activities such as breathing and digestion, resulting from natural functions of the body through oxidation, lead to formation free radicals that cause cancer, premature cardiac aging some chronic diseases. Antioxidants are substances remove prevent cell damage. Seafood significantly contributes elimination radicals, especially owing its high quality nutrient content. In this context, objective study was determine radical antioxidant capacity total amount carotenes in razor...

Buyuk Menderes River basin, located in the Southern part of Turkey, has two significant dam lakes. Threats include pollution (industrial and agricultural activities), overfishing, habitat degradation drought. This study was carried out to determine native non-native fish fauna Kemer Topcam dams lakes River. Specimens were caught by scoop gill nets between April 2007 February 2008. is inhabited Cyprinus carpio, Squalius cephalus, Barbus plebejus escherichi, Silurus glanis Acanthobrama...