İlker Zeki Kurtoğlu

• Professor (Associate) at Recep Tayyip Erdoğan University

In the present study, histopathologic effects of the cement mixing with water in aquatic environment on rainbow trout (Oncorhynchus mykiss) and Siberian sturgeon (Acipenser baerii) has been examined. Both of the two fish species were exposed to 125 and 500 mg/l of concentrated cement for 96 hours. LC50 values were calculated 0.44 g/l for trout (O....

In this study, the effect of ammonia on the Acipenser gueldenstaedtii was investigated using non-invasive methods. Different concentrations (100, 200, and 400 mg·lt⁻¹) of ammonium chloride (NH4Cl) were added to the experimental groups to simulate ammonia in aquaculture systems, and the movements of the fish were monitored, recorded, and analyzed us...

Anesthesia is applied to protect fish welfare for reducing employee workload in aquaculture. The efficacy of the anesthetic agent varies depending on the fish species. In this study, the effect of a commercial anesthetic (VetiVital AquaSED) manufactured mainly with herbal extracts (includes eugenol, linalool, linalyl acetat etc.) on three different...

Danube sturgeon (Acipenser gueldenstaedtii) which is identified as endangered species can be exposed to pollutants such as bisphenol A (BPA) that have a disruptive effect on the endocrine system at any time. Starting from this motivation, the current study focused on BPA toxicity in A. gueldenstaedtii juvenile individuals and its adverse effects in...

Fruits and vegetables are wasted in huge amounts and nearly 30% of all produced food is never consumed which leads to many economic and environmental issues. Similarly, the poultry industry generates a huge volume of waste. This refuse is reported to have high nutritional value and could be used as ingredients in the feed industry. Black soldier fl...

Çalışmada Trabzon ilinde bulunan su ürünleri yetiştiricilik tesislerinin yapısal özellikleri ve mekanizasyon kullanımı araştırılmıştır. Çalışma açık deniz kafes ve karatabanlı işletmeler olmak üzere 2 farklı alanda faaliyet gösteren işletmede altyapı, yönetim ve mekanizasyona dair hazırlanan anket yoluyla yapılmıştır. Açık deniz ağ kafes işletmeler...

As an industrial synthetic chemical, bisphenol A (BPA) has the potential to have physiologically and histologically adverse effects on aquatic organisms. BPA causes the reproductive disrupting of all vertebrates due to its degradation on endocrine system. Therefore, the effect of BPA on fish with high economic value is an important issue. This stud...

Dünya nüfusundaki aşırı artışa bağlı olarak su ürünleri yetiştiriciliği gibi gıda üretim endüstrileri, protein içeren gıda stoklarındaki eksiklik sorunuyla başa çıkabilmek için daha da genişlemeye çalışmaktadırlar. Bir gıda sektörü olan su ürünlerinin zamana bağlı hızlı gelişimi, üzerinde çalışılması gereken birçok konuyu da beraberinde getirmiştir...

This research was carried out to determine that the effects of diets containing 30% hazelnut meal and different proportions of phytase enzymes on the growth performance of Siberian sturgeon (Acipenser baerii) (initial mean weight, 960.23 ± 0.55 g). The trial diets consisted of feeds supplemented with 0.25 g kg⁻¹ (G2), 0.50 g kg⁻¹ (G3), and 1.00 g k...

In this study, we investigated the effects of different stocking densities water quality and blood parameters during the transportation of the Siberian sturgeon (Acipenser baerii). Experiments were carried out in high‐density polyethylene tank with three different stocking densities (50, 100 and 150 kg/m3) for 20 h. Ammonium nitrogen (NH4‐N) and ni...

This study aims to determine the appropriate egg powder ratio that can be substituted into the fish meal to close the protein deficit without adversely affecting the development performance of rainbow trout fry (Oncorhynchus mykiss) (0.38±0.01 g and 3.55±0.05 cm). Also, the effects of egg powder used as a protein source on rainbow trout feed on gro...

This study was carried out to determine the effect of earthworm meal usage on growth performance and body composition in fry rainbow trout feed. The 360 fish with an average weight of 5.05 ± 03.61 g were used in the study. In the experiment, four different feeding groups were designed with 3 replications. These groups are SU0 (Control), SU1, SU2 an...

The effects of body and meals sizes on gastric evacuation (GE) of the endangered Siberian sturgeon (Acipenser baerii) were parameterized (at temperatures ranging from 16.8 to 17.6°C) using radiography technique. GE experiments were performed using different body sizes A. baerii ranged from 1.5 kg to 5 kg fed on meal sizes of 4.6 g to 47.6 g compose...

Duo culture response of Siberian sturgeon (Acipenser baeri) and rainbow trout (Oncorhynchus mykiss) was evaluated in culture tank conditions. Triplicated culture groups were planned as: mono-culture sturgeon (M, n=10), duo-culture sturgeon (DM, n=10) and duo-culture trout (DA, n=10), and mono-culture trout (A, n=10). Examination of mono and duo cul...

In this study, the effects of feeding with the diets containing hazelnut meal (HM) at different levels (0%, 15%, 30%, and 45%) on the growth performance and body composition of Siberian sturgeon were investigated. The study was carried out for 90 days with 3 replicates (n = 15; 283.1 ± 6.52 g fish weight). The highest weight gain (180.62 ± 2.84%) w...

The effects of probiotically used kefir on growth, survival rate and meat yield characteristics of brook trout (Salvelinus fontinalis) were investigated in this study. For this purpose, kefir was added to trial diets at different rates 20 ml/kg feed (G2), 40 ml/kg feed (G3) while commercial fish feed was used as a control 0 ml/kg feed (G1). Total 2...

In this study, the effects of various daily feeding ratios on the growth, stomach volume and meat composition in rainbow trout (Oncorhynchus mykiss) were investigated. The feeding experiment was conducted in 450 L volume fiberglass tanks with 3 × 3 factorial patterns. During the experiment, while food were given to the fish at the first group in th...

An invasive freshwater shrimp, Red Cherry Shrimp (Decapoda: Caridea: Atyidae), is naturally distributed in fresh water habitats of Asia. This forage species has an important role in aquatic ecosystems by transferring planktonic production into higher trophic levels mainly including fish and aquatic animals. However, temperature strongly affects sex...

In this study; the effects of red pepper (P) and powdered pepper (F), added to the diet at different concentrations on the rainbow trout pigmentation to be harvested, have been examined. Experimental fish groups' mean weights at the beginning of the study were 146.1±0.52 g. The groups were monitored during the 10 weeks, and compared with control (C...

Farming sturgeons is an economically important practice in a number of Asian and European countries. However, since it is not widely implementedin Turkey, fertilized eggs necessary for research and industrial activities are imported from Germany. Due to the interest of several fish farms in culturing sturgeon in Turkey and the lack of relevant data...

Aquaculture keeps topics of rapid increase in manufacturing amount, economy of feed additives, alternative feed additives, and sustainable supply of feed additives on the agenda. Discontinuity in supply of fish meal being fundamental animal protein source in fish-feed accelerated pursuit for alternative animal protein sources. Earthworms are prefer...

In this study, physiological reaction of the Black Sea trout was aimed to identified, during the Black Sea transferring period to Black Sea (18‰).After salty water treatment of the two similar groups in November, individual morphometric adaptation success was identified. Fish in both groups were sorted evaluated fish parr marks formations, because...

Angelfish (Pterophyllum scalare, 1.54±0.03 g, n=500) were exposed for 24, 48, 72 and 96 hours to different concentrations NH3-N (0.2-2 mg/L), and NO2-N (1-35 mg/L) at pH 7.2±0.3. Using Probit analysis, 50% lethal concentrations (LC50) and 95% confidence limits were calculated. The effects of ammonia (0.7 mg NH3-N/L and 10 mg NO2-N/L) nitrite to the...

Physical properties (pellet dimension, sinking velocity, hardness, durability, friability, and water absorption) and proximate composition of two major domestic producer's trout feeds, the trademarks are BioAqua (Çamlı Feed by Pınar Campany) and Blueaq (Abalıoğlu), in Turkey were evaluated. The amount of uneaten feed is closely related to physical...

No comparative study could be found for the analgesic activity of mucuses from the Oncorhynchus mykiss (OM), Salvelinus fontinalis (SF), Salmo coruhensis (SC), Acipenser gueldenstaedtii (AG), and Acipenser baerii (AB) fish species in the literature. We aimed to investigate the effects of mucuses obtained from the abovementioned fish species on scal...

An a-carbonic anhydrase (CA, EC 4.2.1.1) was purified and characterized kinetically from gill of Acipenser gueldenstaedtii as an endangered sturgeon species. The carbonic anhydrase was purified 66-folds with yield 20.7% by Sepharose-4B-L-tyrosine-sulfanilamide affinity column and the specific activity was determined as 222.2 EU/mg protein. Km and V...

In aquaculture, bacterial fish diseases are still one of the most serious problem and fish mortality of bacterial origin can cause significant economic losses worldwide. The evolution of microorganism resistance to antibiotics has resulted in growing need for new antibacterial compounds. In the present study, the antibacterial activity of green tea...

The aim of this study was to determine changes in quantitative characteristics of the rainbow trout semen throughout the reproductive season. Semen samples were collected from October to May from broodstock males (n = 12) kept under natural photoperiod regime and semen volume, density, motility, duration of motility, spermatocrit and pH parameters...

The effects of different extenders and storage periods on the motility and fertilization rate of rainbow trout (Oncorhynchus mykiss) semen were evaluated after short-term storage. Semen was collected from anesthetized males by the abdominal massage. After determination of main semen characteristics, the pooled ejaculates were diluted with 4 differe...

This study determined spermatologic characteristics of semen from Salmo coruhensis and analyzed an extender for its short-term storage. Sperm was collected from 15 males in the spawning season by abdominal massage. Volume, motility, duration of motility, density, spermatocrit, and pH of the sperm were determined, as well as the correlation between...

Aim of this study is to determinate oxygen consumption rate of Black Sea trout, (Salmo trutta labrax Pallas, 1811) in the sea water (18‰ salinity) in tanks at farm condition. Two different fish size were used as small size and big size which average weights 54.1 ±3.06 (n=300) and 507.0 ±17.71 (n=32) g, average total lengths 17.7 ±0.36 and 35.5 ±0.4...

The objective of the present work was to examine the effects of different doses (0, 10, 20 and 40 g kg -1 fish diet mass) of kefir on growth performance and oxidant-antioxidant status in the blood and liver tissues of Coruh trout, Salmo coruhensis, in different periods (2 and 3 months). In this study, survival was more than 88.3%, and irrespective...

Cited By (since 1996):1, Export Date: 18 October 2014

In this study, stream trout (Salmo trutta), caught from the Northern Firat river basin. in province of Erzurum were fed trout feed after a week long adaptation period. After 2 months adaptation period, they were fed commercial trout feed regularly for 3 month trial period. Individually tagged fish were categorized as small (20-50 g), medium ( 50-10...

The spermatologic characteristics of European flounder (Platichthys flesus luscus) were determined. Flounder were collected during the spawning season and sperm of eight males was extracted by abdominal massage. Body weight and total length of the flounder were measured, volume, motility, duration of motility, spermatocrit, density, and pH of the s...

The aim of this report is to provide an overview of the current status of efforts on the potential rehabilitation of sturgeon populations in Turkish waters, describing the structure and the outcome of projects carried out since 2006 and identifying the strategic needs for sturgeon conservation measures at a national level. It is well known that the...

The economic analysis was performed and sustainability was evaluated for 7 leader Turkish marine hatcheries which have 61.5% of Turkish total marine fish fry production. For this purpose, the fixed cost including investment and operational costs including feed, labor, energy, fuel, water, oxygen, and medicament costs were determined by face to face...

ZET Bu çalışmada, akarsuda yapılacak olan balıklandırma çalışmalarına bir örnek teşkil etmesi bakımından, balıklandırmada kullanılan genel kriterlerden akarsuyun seçimi, biyolojik yapısı, istasyon seçimi, yöntem, tür, balıklandırma ve geri dönüşüm oranı irdelenmiştir. Çalışma, Yanbolu Deresi üzerinde Aralık 2006 ile Kasım 2007 tarihleri arasında yü...

zet: Son yıllarda nesli tehlikede olan balık türlerinin doğal stoklarının yapılandırılması için kont-rollü şartlarında üretilmeleri önem kazanmaktadır. Mersin morinaları da nesli tehlikede olan balıklardandır. Bu çalışmada anaç stoku oluşturmak için Karadeniz'in Türkiye sahil sularında yakalanan genç mersin morinaları tank ortamına adapte edilmişti...

This chapter reviews the limited studies conducted on the life history and ecology of Turkish sea trout populations in relation to conservation and management issues. A sea-going form of brown trout, called the Black Sea trout, Salmo trutta L., is found in only some Turkish and Georgian rivers of the Black Sea. There has been longstanding debate re...

Growth performances, daily food consumption and feed conversion ratios of rainbow (Onchorynchus mykiss) and brook trout (Salvelinus fontinalis) reared as single and mixed species were compared. During the experimental period, which lasted for about a growing season (December - June, 217 days), mean % weight increment of single species brook trout g...

In this study reproductive performance of female rainbow trout broodstock (Oncorhynchus mykiss) in a commercial trout farm in Eastern Black Sea Region were evaluated during 1995 spawning season. Mean total and relative fencundity values were 2304+/-425 egg/individual and 1364+/-281 egg/kg, respectively, while mean egg dia meter was 5.2+/-0.21 mm. F...

Aim of this study is to determinate oxygen consumption rate of Black Sea trout, (Salmo trutta labrax Pallas, 1811) in the sea water (18‰ salinity) in tanks at farm condition. Two different fish size were used as small size and big size which average weights 54.1 ±3.06 (n=300) and 507.0 ±17.71 (n=32) g, average total lengths 17.7 ±0.36 and 35.5 ±0.4...