Gökkuşağı alabalığı Oncorhynchus mykiss W Yemlerinde ham soya unu ve kavrulmuş soya kullanımının balıkların büyüme performansı yem tüketimi yemden yararlanma oranı ve besi maliyeti üzerine etkisi

Bilgüven, Murat | Barış, Mustafa

Alabalık karma yemlerinde tam yağlı soyanın balık ununun yerine kullanılma olanakları

Bilgüven, Murat

Balık unu salmonid yemlerinin en önemli hayvansal protein kaynağıdır. Ancak, fiyatının yüksek oluşu, her zaman istenilen miktarlarda bulunmayışı, çok çeşitli balıklardan çok çeşitli yöntemlerle (şekillerde) elde edilmesi sonucu kalitesinin sabit olmaması ve saklama güçlükleri nedeniyle ülkemizde alabalık karma yemlerine istenilen düzeyde balık unu katı1amamaktadır. Bundan dolayı bu araştırmada, alabalık rasyonlarında balık ununun bir kısmı yerine ülkemizde fiyatı balık unundan daha ucuz olan tam yağlı soya kullanılmasının, balıkların canlı ağırlık artısı, yem tüketimi, yemden yararlanma oranı ve ayrıca balık maliyetine etkisi incelenmiştir. Denemede ortalama canlı ağırlıkları 50.13 - 50.83 g arasında olan 600 adet gökkuşağı alabalığı (Salmo gairdneri, R.) gençleri kullanılmış ve deneme 10 ...

Accumulation and Elimination of Cadmium by the Nile Tilapia (Oreochromis niloticus) in differing Temperatures and Responses of Oxidative Stress Biomarkers

Karayakar, Fahri | Cicik, Bedii

The aims of this study were to investigate the accumulation (15 days) and elimination (15 and 30 days) of cadmium (Cd) in the liver, gill, kidney and muscle of Oreochromis niloticus following exposures to different concentrations (1 and 2 mg/L) of Cd at different water temperatures (20, 25, 30 o C). Additionally, responses of oxidative stress biomarkers (superoxide dismutase, SOD; catalase CAT; glutathione peroxidase, GPx and malondialdehyde, MDA) of the liver were determined following Cd exposures. In accumulation period, Cd levels increased significantly in all the tissues at all temperatures and tissue accumulation order was kidney>liver>gill. All tissues, except the muscle, accumulated Cd in relation to exposure concentrations and water temperatures. There was no measurable level of Cd...

DENİZ VE SU ÜRÜNLERİ YETİŞTİRİCİLİĞİNİN İKLİM DEĞİŞİKLİĞİNE NEDEN OLMADAN SÜREKLİĞİNİN SAĞLANMASI

Bilgüven, Murat

Comparison of Biochemical, Fatty Acids and Lipid Quality Indexes of Prussian Carp (Carassius gibelio) Caught from Lake Çıldır on Different Seasons

Essential fatty acids have a crucial function in human health and hence there is a growing interest in fatty acids profile and nutritional quality of fish, originating from both marine and freshwater resources. This research was performed to identify the seasonal changes in nutritional quality, fatty acids composition and energy contents of Prussian carp inhabiting in Lake Çıldır, Turkey. The fatty acids profile showed, monounsaturated fatty acids ranging from 44.82% in the spring to 41.28% in the autumn. The content of total saturated fatty acids (SFA) was changed from 30.35% (summer) to 29.40% (autumn). The highest polyunsaturated fatty acids (PUFA) content was observed in summer (25.02%) and the lowest in spring (21.52%). Major fatty acids were palmitic, oleic, linoleic acid, eicosapent...

Güney Marmara Bölgesi nde alabalık üretimi yapan işletmelerin yapısal ve ekonomik analizi

Bilgüven, Murat

EKOLOJİK SU ÜRÜNLERİ ÜRETİMİ

Bilgüven, Murat

Yirminci yüzyılın ikinci yarısında yaşanan hızlı sanayileşme ve nüfus artışı, çevre sorunları yanında, artan nüfusun yeterince beslenememesi yani açlık sorunun ortaya çıkmasına neden olmuştur. Artan nüfusun beslenme gereksinimi, insanoğlunu tarımda birim alandan; maksimum ürün almaya yöneltmiştir. Birim alandan yüksek verim almaya yönelik yoğun ve bilinçsiz tarım ilacı ve gübre kullanılması ve sonuç olarak, bu kimyasalların tarımsal ürünlerde oluşturduğu ve yeraltı sularına karışarak içme sularında yarattığı kalıntılar, insan sağlığını ve yaşamını tehdit etmeye başlamıştır. Verim artışı ile yetinilmemiş, genetik bilimin tüm teknolojileri de kullanılmaya başlanmış, bitki ve hayvanların DNA yapıları değiştirilmiş, melezleme ve klonlama yöntemleri uygulanmıştır. Tüm bunların sonucunda ekoloji...

The Recent Advances to Increase Nutrient Utilization of Dietary Plant Proteins by Enzyme Supplementation and Fermentation in Rainbow Trout (Oncorhynchus mykiss): A Review

Engin, Kenan | Koyuncu, Cafer Erkin

Aquaculture is the fastest growing animal production sector globally. However, its sustainability heavily relies on the development of nutritionally balanced cost-effective and environmentally friendly aqua feeds for fish and crustacean species that are already being farmed or the candidate species for intensive farming in the future around the world. Therefore, feeds produced for farmed aquatic species should be highly digestible in terms of nitrogen and phosphorous contents in order to avoid excessive release of these nutrients into the water column through solid and soluble discharge. Excessive nitrogen and phosphorous in the water are the main reason of eutrophication occurring causing severe depletion of oxygen and creating hypoxia for many aquatic organisms living inside water column...

Balık Ununun Bir Kısmı Yerine Tam Yağlı Soya Kullanımının Gökkuşağı Alabalığı Oncorhynchus Mykiss W 1792 Yemlerinde İlave Sentetik Amino Asit Ve Veya Dikalsiyum Fosfat Kullanılmasının Besi Performansı Üzerine Etkisi

Bilgüven, Murat

Balık beslemede çinko

Bilgüven, Murat

Diurnal ammoniaandureaexcretionratesinEuropeanseabass, Dicentrarchuslabrax fed dietscontainingmixturesofcanolaandcotton seed oilattwodifferentambienttemperature

Engin, Kenan

The knowledgeaboutthecombinedeffectsofhighertemperatureanddietarynutrientqualityonthe diurnal nitrogenousexcretionratesisverylimitedinfarmed fish speciesincludingEuropeanseabass. Thereforethisstudyinvestigatedthecombinedeffectsofincreasinglevels(30vs.60%)ofdietary fish oil replacement byequalmixtureofcottonseedoil(CSO)andcanolaoils(CO)andtwodifferentambient temperature(24vs.30 1C) ondiurnaltotalammoniaandUrea–N excretionratesinEuropeanseabass (Dicentrarchuslabrax). Experimentaldietswerefedto fish threetimes(08:30–13:30–18:30h)ata fixed rateof3%BW.d
1. Thedailyconsumednitrogenandenergyintakeof fish weresimilarduringthe investigationindifferentdietarytreatments.However,thedailyexcretionratesofTAN,totalnitrogen (TANþUrea–N) andtotalnitrogenexpressedasaproportionofconsumednitrogenbytheEuropean...

Heavy metal levels in economically important fish species sold by fishermen in Karatas (Adana / TURKEY)

Karayakar, Fahri | Işık, Umut | Cicik, Bedii

In this study, heavy metal (Cu, Zn, Cr, Cd, Pb and As) levels in the muscle of economically important fish species (Trachurus mediterraneus, Sparus aurata and Pegusa lascaris) living in different water columns in the North-East Mediterranean Sea were measured. Fish were bought from local fishermen between September 2016-August 2017 in Karatas¸ region (Adana, Turkey). Levels of Cd, Cr, Pb and As were highest in the muscle of T. mediterraneus, S. aurata and P. lascaris in the autumn season, while Cu levels were highest in T. mediterraneus and S. aurata in the spring season. The lowest and highest levels of Cu, Zn, Cr, Cd, Pb and As in the muscle of fish were 0.11–0.37, 0.09–0.57, 0.03–0,28, 0.002–0.03, 0.04–0.11 and 0.09–0.49 (μg/g w.w.), respectively. Metal levels in muscle tissues were wit...

Partial Replacement of Fish Oil with Vegetable Oils in Diets for EuropeanSeabass (Dicentrarchus labrax): Effects On Growth Performance and FattyAcids Profile

Engin, Kenan

The study was conducted to determine the effects of alternative oil sources on growth, body composition and feed conversion of sea bass individuals. The tested oils used in the study were as follows: sesame oil (SO), canola oil (CO) and soybean oil (SBO). All tested oils were included at a 50% substitution level of fish oil and were compared with a control diet containing 100% fish oil (FO). There was no effect of diet on specific growth rate. The highest final weight was seen in fish fed SO and FO diets compared to that of fish fed CO diet and SBO diets (P0.05). In the n-6 fatty acids, fish fed SBO diet contained significant amount of linoleic acids (LA, 18:2n-6) compared to that of fish other dietary treatments diets . Deposition of eicosapentaenoic acid (EPA, 20:5n-3) and docosahexaenoi...

The Effects Of Different Oil Sources On The Growth Performance And Body Composition Of Juvenile Nile Tilapia (Oreochromis niloticus, L.)

Bilgüven, Murat

In this study, a total of 600 juvenile fish having 2.54 ± 0.07 g of average initial weight were used to investigate to the effects of different oil sources (fish oil, soybean oil, linseed oil and tallow) on the growth performance and body composition of Nile tilapia (Oreochromis niloticus, L.) during 14 weeks. Experimental diets were prepared as isonitrogenous (307.6 g kg-1 CP) and isocaloric (13.09 MJ DE kg-1 feed). At the end of the study, it was observed that there were no significant differences among the groups for average live weight, live weight gain, feed consumption, condition factor (CF), feed conversion ratio (FCR), protein efficiency ratio (PER), specific growth rate (SGR) and survival rate(P>0.05), but carcass composition (P

Effects Of The Feeds Containing Different Plant Protein Sources On Growth Performance And Body Composition Of Rainbow Trout (Oncorhynchus mykiss W )

Bilgüven, Murat | Barış, Mustafa

In this study, a total of 720 rainbow trout (Oncorhyncus mykiss) having 50.08±0.19 g of average initial weight were used to compare of usage of the soybean meal, sunflower meal, canola meal and cottonseed meal as the best plant protein source. Four different feeds which contain soybean meal (SBM), canola meal (CM), sunflower meal (SFM) and cotton seed meal were used, respectively. Four trial groups were tested in triplicate during 12 weeks. Experimental diets were prepared as isonitrogenous significantly difference among the groups for average feed consumption, condition factor and survival rate, however, average (42% CP) and isocaloric (13.9 MJ DE/kg feed). At the end of the study, it was observed that there was no live weight, live weight gain, feed conversion ratio (FCR), protein effici...

Changes in Liver Tissue Trace Element Concentrations During Hepatitis B Viral Infection Treatment

Karayakar, Fahri | Çolak, Tahsin

Approximately 350–400 million people in the world have Hbs Ag (hepatitis B virus surface antigen) positivity. In the international guidelines, the permanent suppression of replication in chronic hepatitis B virus (HBV) infection therapy is reported as the primary therapeutic goal. Trace elements play a key role in liver diseases. The aim of our study is to determine some trace element concentrations in the liver during HBV treatment periods. The measurement of 11 trace elements (manganese, lead, nickel, chromium, cadmium, iron, copper, zinc, silver, cobalt, and aluminum) was carried out by the method of inductively coupled plasma mass spectrometry in liver biopsy materials (before starting treatment and at the sixth month of the treatment period). There was an increase in zinc and copper c...