Koleksiyon Hastalıklar Anabilim ...
167510

The effects of age and individual size on the Fatty Acids and Elemental Composition of Nemipterus randalli Russell, 1986 from Mersin Bay, Turkey

ÖZER, Selmin, AYAS, Deniz

In this study, the effects of the age and individual size on total lipid content, fatty acids and elemental composition of Nemipterus randalli caught from the Mersin Bay were determined. The lipid content of all age groups was found at similar levels. However, the highest lipid level was determined in the 3+ age group (2.85%) while the lowest level was found in the 2+ age group (2.75%). Dominant fatty acids for each age group of N. randalli are palmitic acid (C16:0), stearic acid (C18:0), vaccenic acid (C18:1n7c), cetoleic acid (C22:1n11), eicosapentaenoic acid (EPA, C20:5n3), and docosahexaenoic acid (DHA, C22:6n3). The highest palmitic acid level was found in 3+ age group (20.45%) whereas the highest stearic acid level was found in the 2+ age group (15.00%). The highest vaccenic acid lev...

167529

İzmir yöresindeki tavukçuluk işletmelerinde kullanılan içme sularının biyolojik (E.coli, Salmonella mikroorganizmaları) ve kimyasal yönden incelenmesi

DÜZEL (ÖZER), Selmin

Bu çalışma İzmir yöresindeki tavukçuluk işletmelerinin içme sularının hijyenik kalitelerini belirlemek amacıyla yapıldı. Bu sebeple, toplam olarak 360 adet içme suyu numunesi mikrobiyel ve kimyasal kaliteleri yönünden incelendi. Sular bakteriyolojik olarak koliform bakteri, E. coli ve Salmonella spp. yönünden incelendi. Suların 141’inde (% 39,1) koliform bakteri, 38’inde (% 10,5) E. coli izole edildi. Bu izolatların 16’sı (%4,4) enteropatojen bulundu. İncelenen su numunelerinin hiçbirinden Salmonella spp. izolasyonu yapılamadı. Kimyasal olarak numuneler bulanıklık, pH, amonyak, nitrat, nitrit ve organik madde yönünden muayene edildi. Numunelerin 45’inde (%12,5) bulanıklık tespit edildi. Bulanıklık bakımından müsbet olan numunelerin 8’inde (% 2,2) amonyak ve 33’ünde (% 9,1) organik madde mi...

167498

Mersin’de Tüketime Sunulan Gökkuşağı Alabalıklarında (Oncorhynchus mykiss Walbaum, 1792) Motil Aeromonas’ların Araştırılması ve Mezofilik Aerobik Bakteri Sayımı

ÖZER, Selmin

An investigation of motil aeromonads and mesophilic aerobic bacteria count in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) marketed in Mersin. In this study, Rainbow trout, sold at three different outlets in Mersin, were tested for motil Aeromonads, zoonose disease agents. 120 samples were collected and analysed from November 2003 to June 2004. Motil Aeromonads were not isolated in any of the Rainbow trout samples. The 8 month mean values of mesophilic aerobic bacteria count of the skin, muscle, organs and intestine of the fishes were at the 1. outlet respectivly 7,4x105, 4,5x104, 6,9x104 and 1,1x107; at 2. outlet 6,8x104, 5,4x103, 8,3x103 and 4,9x106 and at 3. outlet 1,7x105, 1,3x104, 1,1x104 and 2,9x106 CFU g-1. Bu çalışmada, zoonotik hastalık etkenlerinden Motil Aeromonas’ların Mer...

167487

Genetic Heterogeneity and Antibiotic Susceptibility of Vibrio alginolyticus Strains Isolated from Horse-Mackerel (Trachurus trachurus L., 1758)

ÖZER, Selmin | ASLAN, Gönül | TEZCAN, Seda | EMEKDAŞ, Gürol | SERİN, Mehmet Sami

Abstract: This study was performed to investigate the presence of halophylic Vibrio spp. in horse-mackerel (Trachurus trachurus L., 1758). In total, 80 fish samples were collected from fish markets and supermarkets between 04.04.2006 and 16.05.2006 in the city of Mersin. All fish samples were microbiologically tested for halophylic Vibrio spp. Nine (11.25%) Vibrio spp. strains were isolated and identified as V. alginolyticus. Molecular epidemiological discrimination and antimicrobial susceptibility patterns of V. alginolyticus strains were also analysed by arbitrarily primed polymerase chain reaction (AP-PCR) and Kirby-Bauer disc diffusion, respectively. Genotypic heterogeneity of these 9 isolates discriminated by AP-PCR determined that while only 3 isolates were from the same genotypic s...

166328

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 ...

167537

Mersin’de yetiştiriciliği yapılan gökkuşağı alabalıkları (Oncorhynchus mykiss, Walbaum, 1792)’ında saptanan ektoparazit protozoonlar

ÖZER, Selmin | KOYUNCU, Erkin | DÖNMEZ, Erdem | Pınar, ERDOĞAN

Mersin ilinde faaliyet gösteren 7 gökkuşağı alabalığı (Oncorhynchus mykiss, Walbaum, 1792 işletmesinde 2005 yılında bir yıl süreyle 226 balık paraziter yönden incelenmiştir. İşletmelerde kullanılan suyun sıcaklığı (ºC), çözünmüş oksijen (mg/L) ve pH değerleri ölçülmüştür. Mikroskobik bakı balıkların dış yüzeyi, yüzgeçleri ve solungaç yapraklarından kazıntı alınarak 100X, 250X ve 400X büyütme ile ışık mikroskobunda natif olarak yapılmıştır. İncelenen 226 adet balığın 41’inde (%18,14) 42 adet ektoparazit protozoona rastlanmıştır. 25 (%11,06) adet balıkta Ichtyophythirius multifiliis Fouquet, 1876, 12 (%5,31) balıkta Trichodina spp. Ehrenberg, 1838 ve 5 (%2,21) adet balıkta Chilodonella spp. Strand, 1926 tespit edilmiştir. Bir adet balıkta Trichodina spp. ve Chilodonella spp. görülmüştür. Ba...

166231

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...

166295

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...

167523

Bacterial agents isolated from cultured marsh frog (Pelophylax ridibundus, Pallas 1771)

Özer, Selmin

Marsh frogs (Pelophylax ridibundus) are preferred in European cuisine. In recent years, interest in farming of marsh frogs has increased, but little is known about their bacterial diseases. This research was carried out in a marsh frog farming operation in Mersin, Turkey, in order to determine the bacterial diversity. For this purpose, a total of 339 frog, 30 water, and 8 feed samples were collected. Isolation and identification of bacteria were carried out by conventional techniques and the VITEK-2 compact system. Antimicrobial susceptibility testing was performed by Kirby-Bauer disc diffusion method. A total of 239 isolates of 49 different species, including 31 Gram negative rod-shaped bacteria, 9 Gram positive rod-shaped sporeforming bacteria, and 9 Gram positive cocci-shaped non-sporef...

166235

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...

Kitap Bölümü2008Ekoder 132 | 1 Erişime Açık
166236

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...

167495

Molecular identification and determination of some virulence genes of Aeromonas spp. in fish and water from Turkish coastal regions

ÖZER, Selmin

Identification of Aeromonas species is known to be troublesome due to their phenotypic and genotypic heterogeneity. A total of 60 bacterial isolates from water and rainbow trout samples from Turkish coastal regions (Black Sea, Aegean Sea and Mediterranean Sea) were used for 16S rDNA-Restriction Fragment Length Polymorphisms (RFLP) analysis with AluI, MboI, NarI and PstI as restriction enzymes and molecular identification was eventually completed with PCR amplification of the fstA, A. salmonicida specific gene. In addition, the presence of 6 virulence genes (aer, ser, lip, gcat, nuc and laf) in the isolates was investigated using rapid hexaplex-PCR. The frequencies of the identified Aeromonas species were 38.33% for A. sobria, 23.33% for A. hydrophila, 10.0% for A. veronii and 26.67% for ...

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