Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2025Scopus SJRQ2Farm-Raised Versus Wild Caught Fish: Which is Better?
Can, Erkan; Özçiçek, Esin; Erol, Nida Demirtaş; Austin, Brian
There has been much discussion about which is better, farmed (= aquaculture) or wild-caught fish (= capture-fisheries), with supporters and opponents of both approaches. On balance, aquaculture should be the better option because of the ability to control all aspects of production. The result is that farmed products are often cheaper than wild-caught equivalents. However, there are negative aspects to aquaculture, including habitat destruction, for example the removal of mangroves for the construction of shrimp farms, the effect of escapees on native fish populations, and the possible negative impact of pollution from organic material, pathogens and antimicrobial compounds. The use of wild-caught “trash” fish as a source of protein and oil for the diets of carnivorous fish species in aquaculture is unsustainable. In contrast with wild-caught fish, there is greater variability in supply because of overfishing, quotas imposed by governments, and the effects of adverse weather. Moreover, fishing in distant waters is expensive and hazardous. Certainly, the quality of the product is more difficult to control because the history of the catch is largely unknown. However, there are concerns about illegal fishing activities, and the capture of undersized specimens which impacts negatively on future stocking levels. For the forseeable future, there will be roles for both aquaculture and capture-fisheries to meet the increasing global demand for aquatic food.
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İncele - MakaleAçık Erişim2024Scopus SJRQ3Lipid content and wastewater treatment potential of Chlorella vulgaris and Scenedesmus obliquus isolated from Uzuncaylr Dam Lake
Can, Şafak Seyhaneyildiz; Can, Erkan; Yilmaz, Kadir
Production of microalgae for biodiesel, one of the alternative renewable energy sources, is costly due to nutrient media. Industrial and domestic wastewater contains nitrogen, phosphorus and other nutrients that are the primary food source for algae. Releasing this environmentally harmful effluent into receiving bodies of water, such as the sea or a freshwater reservoir, without prior treatment causes serious problems. Combining microalgae cultivation with wastewater treatment is a promising strategy for improving wastewater and reducing the cost of nutrient media required for algae production. In this study, wastewater obtained from a wastewater treatment facility was diluted with clean water to 0.25%, 50%, and 75% concentrations, and Chlorella vulgaris and Scenedesmus obliquus were cultured in these nutrient media for 20 days. As a result, microalgae increased their biomass and lipid content, while consuming nitrite, nitrate, phosphate, and ammonium from the wastewater as nutrients.
AtıfScopus3WoS2OpenAlex2İncele - MakaleAçık Erişim2023Spermatozoa Cryopreservation of Sex-Reversed Rainbow Trout (Oncorhynchus mykiss): The Effect of Dilution Rate and Supplementation of a N-(2-Mercaptopropionyl)-Glycine -Based Extender on Sperm Motility and Fertilizing Capacity
Kutluyer Kocabaş, Filiz; Can, Erkan; Dogan, Mustafa
For commercial aquaculture, the obtainment of all-female salmonid populations is important in fish farms. After freezing process, variable spermatozoa maturity, higher sperm concentration, low sperm quality, and reduced fertilization success have been observed in sex-reversed female rainbow trout. For these reasons, the objective of this study was to assess effect of dilution rate and supplementation of a N-(2-Mercaptopropionyl)-Glycine (MPG)-based extender on sperm motility and fertilizing capacity of sex-reversed rainbow trout (Oncorhynchus mykiss). The supplementation of MPG [0 (control, 0), 1 mM; 2 mM; 4 mM] to extenders and dilution ratio (1:9, 1:15 and 1:25) were tested in sex-reversed female rainbow trout spermatozoa during cryopreservation. For thawing, the straws (0.5 ml) were placed in a water bath at 37°C for 30 s. Our results showed that the best concentration of MPG was 2 mM for post-thaw motility duration (120.67±9.07%), fertilization (62.67±3.10%) and hatching rate (54.33±3.10%) at 1:15 dilution rate. Overall, MPG provided improvements during cryopreservation process and could be used as protective agent.
- MakaleAçık Erişim2022Gökkuşağı Alabalığı (Oncorhynchus mykiss) Juvenillerinin Anestezisinde Karanfil (Eugenia caryophyllus), Okaliptüs (Eucalyptus citriodora) ve Melisa (Melisa officinalis) Esansiyel Yağlarının Etkin Konsantrasyonlarının Belirlenmesi
Can, Erkan; Coşansel, Çiğdem
Su ürünleri yetiştiriciliğinde 2-fenoksietanol, MS-222 ve benzokain gibi sentetik anestetikler yaygın olarak kullanılmaktadır. Amerika ve İngiltere'de yemeklik balıklarda kullanılmasına yasal olarak izin verilen tek anestetik madde MS-222’dir. İlaç ve Gıda Örgütü (FDA) tarafından MS-222’nin balık vücudundan atılma süresi su sıcaklığına göre farklılık göstermekle birlikte ortalama 21 gün olarak belirtilmiştir. Bu da balıkların pazarlanmasında gecikme yaşanmasına neden olmaktadır. Yapılan araştırmalarda karanfil (Eugenia caryophyllus) esansiyel yağının (KEY) anestetik etkileri üzerine birçok çalışma gerçekleştirildiği görülmektedir. Bununla birlikte, son yıllarda okaliptüs (Eucalyptus citriodora) esansiyel yağı (OEY) ve melisa (Melisa officinalis) esansiyel yağının (MEY) anestetik etkileri hakkında birkaç çalışmanın olduğu görülmüştür. Bu çalışmada, KEY (Kontrol); 25, 37,5, 50 µl L-1, OEY; 300, 350, 400 µl L-1 ve MEY; 200, 300, 400 µl L-1 olarak üçer farklı konsantrasyonda kullanılmış olup gökkuşağı alabalığı jüvenil bireylerinde uygun anestetik konsantrasyonlar tespit edilmiştir. Karanfil esansiyel yağının 37,5 µl L-1, okaliptüs esansiyel yağının 400 µl L-1, melisa esansiyel yağının 400 µl L-1 konsantrasyonları ile kullanımı gökkuşağı alabalığı (Oncorhynchus mykiss) için minimum etkili konsantrasyonlar olarak bulunmuştur.
- MakaleAçık Erişim2022Scopus SJRQ3Effects of kefir supplementation on body antioxidant-systems, haemolymph heat-shock protein 70 and trypsin, in the crayfish Astacus leptodactylus Eschscholtz (Decapoda, Astacidea)
Aksu, Önder; Türkoǧlu, Semra; Can, Erkan; Erişir, Mine; Kocabaş, Mehmet; Kayim, Murathan; Benzer, Fulya
This study was designed to investigate the effects of dietary kefir on trypsin, heat shock protein 70 (HSP70) as well as the oxidant and antioxidant status of the freshwater crayfish, Astacus leptodactylus. The experiment was performed with the four following treatments: Control group, D1, D2 and D3 (kefir supplemented diet 2, 4, 8 g/kg of crayfish body mass, respectively). Crayfish were stocked into 12 fibreglass tanks (three replicates per treatment) and fed for 45 days. Reduced glutathione (GSH), glutathione peroxidase (GSH-Px), malondialdehyde (MDA) and catalase (CAT) in hepatopancreas and muscle were analysed to determine the status of the oxidant/antioxidant balance. In addition, HSP70 and trypsin were measured in haemolymph. Our results indicated that the activity of GSH-Px, MDA and GSH levels decreased in hepatopancreas ( p > 0.05) and muscle tissues ( p < 0.05) with increasing kefir concentration, while CAT activity increased ( p < 0.05). Trypsin and HSP70 insignificantly decreased in haemolymph.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2022Scopus SJRQ2Comparison of nutrient contents of wild and farmed rainbow trout (Oncorhynchus mykiss, Walbaum 1792) from Keban Dam Lake in Eastern Anatolia region of Turkey
Özçiçek, Esin; Can, Erkan; Yılmaz, Ökkeş
In this study, fatty acids, fat-soluble vitamins (A, D, E, K vitamins) and cholesterol contents of wild-caught and farm-raised rainbow trout (Oncorhynchus mykiss) were compared. The amounts of docosahexaenoic acid (22:6 n-3, DHA) in wild and farmed forms were 21.56%–18.14%, 18.79%–16.21% and 14.34%–11.49% in April, May and June, respectively. Vitamin E, which is one of the fat-soluble and antioxidant vitamins, showed highest level among the vitamins. Vitamin E levels in both wild and farmed fish were 5.11–4.26, 4.83–2.89 and 0.99–1.95 mg/100 g in April, May and June, respectively. The substantial difference between wild and farmed rainbow trout was found in May (p < 0.05). In conclusion, both wild and farmed rainbow trout from Keban Dam Lake (Pertek Region) can be considered as good sources of n-3 polyunsaturated fatty acids (PUFA). However, it was observed that the n-3 PUFA level in wild form was higher than the culture fish within the investigated monthly periods. On the other hand, farmed fish demonstrated higher levels of n-6 PUFA over the wild individuals.
AtıfScopus11WoS9OpenAlex8İncele - MakaleYalnız künye2020Scopus SJRQ3Potential anesthetic properties of bay leaf (Laurus nobilis) essential oil compared with 2-phenoxyethanol on blue dolphin cichlid, cyrtocara moorii
Kizak, Volkan; Can, Erkan; Seyhaneyildiz Can, Şafak
The efficacy of Bay leaf (Laurus nobilis) essential oil (LnEO) as a herbal anesthetic agent was evaluated with 2-Phenoxyethanol (2-PE) in Blue Dolphin Cichlid, Cyrtocara moorii. Fish were exposed to different anesthetic concentrations and the lowest effective concentrations (LECs) were determined according to deep anesthesia (AD<3 min) and full recovery (RF<5 min) times. LnEO showed anesthetic properties, and all applied concentrations of both agents induced AD in C. moorii. The LECs of LnEO and 2-PE for C. moorii were determined as 800 µl L-1 (AD; RF → 183 ± 6.3 s; 191 ± 2.6 s) and 600 µl L-1 (AD; RF → 171 ± 3.2 s; 239 ± 4.9 s), respectively. Significant differences were found between anesthetic agents in terms of deep anesthesia and full recovery times for the same concentrations (p<0.05). Induction and recovery times decreased with increasing in LnEO concentrations. On the other hand, anesthesia times were decreased with increasing of 2-PE concentrations, while recovery times increased. Induction and recovery times for LnEO were significantly dependent on concentrations and positive relationships were recorded between AD and RF, whereas the relationship was negative in 2-PE. Bay leaf essential oil has not been used as an anesthetic agent in fish until now. Our results showed that LnEO was an effective anesthetic agent with some minor side effects on C. moorii.
AtıfScopus2OpenAlex2İncele - MakaleYalnız künye2019Scopus SJRQ3Anesthetic Efficiency of Three Medicinal Plant Oils for Aquatic Species: Coriander Coriandrum sativum, Linaloe Tree Bursera delpechiana, and Lavender Lavandula hybrida
Can, Erkan; Kızak, Volkan; Can, Şafak Seyhaneyıldız; Özçiçek, Esin
This study evaluated the potential of three essential oils (EOs) that were obtained from coriander Coriandrum sativum (CEO), linaloe tree Bursera delpechiana (BEO), and lavender Lavandula hybrida (LEO) as anesthetic agents. Convict Cichlids Amatitlania nigrofasciata (Günther 1867) were exposed to eight concentrations of anesthetic (50, 75, 100, 125, 150, 200, 250, and 300 μL/L). After exposure to the anesthetic, the fish were transferred to clean water to recover. All of the EOs produced an anesthetic effect after exposure to the compounds for 30 min at the minimal effective concentration (MEC), which was identified according to deep anesthesia (A5 < 3 min) and full recovery (R3 < 5 min) times. At 50 and 75 μL/L, the total loss of equilibrium was not observed for all tested EOs. The total loss of reflex was induced at a faster rate with higher concentrations of anesthetic in all groups. The recovery time generally increased as the concentration of the anesthetic increased. These findings suggest that CEO, BEO, and LEO are all novel potential anesthetics for aquaculture, and the optimal concentrations were identified as 150 μL/L (A5; 156 ± 1.7 s and R3; 165 ± 2.9 s), 125 μL/L (A5; 176 ± 3.5 s; R3; 125 ± 2.0 s), and 200 μL/L (A5; 20.1 ± 2.4 s and R3; 162 ± 3.4 s), respectively. When considering the active ingredients of EOs, this study also demonstrated that future studies should be focused on the major components such as linalyl acetate, 1.8-cineole, α-pinene, geraniol, and linalool. Their synergistic effects should be examined in herbal anesthetic treatments, since new commercial anesthetics will likely contain them.
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İncele - MakaleAçık Erişim2019Scopus SJRQ3Anesthetic and sedative efficacy of peppermint (Mentha piperita) and lavender (Lavandula angustifolia) essential oils in blue dolphin cichlid (Cyrtocara moorii)
Can, Erkan; Sümer, Esma
The use of different essential oils (Eos), which are considered as a good alternative to synthetic materials, is increasing day by day in fish species. Nevertheless, studies on the anesthetic effect of peppermint Eo (Mentha piperita; MPEo) and lavender Eo (Lavandula angustifolia; LAEo) are scarce. In the present study, the effective concentrations of three anesthetic materials (MPEo, LAEo, and MS-222) were previously determined in the concentrations range of 100–400 ppm in Cyrtocara moorii juveniles (4.92 ± 1.03 g and 7.13 ± 1.22 cm) with the criteria of appropriate induction time (AIt) and ready recovery time (RRt) (Trial 1). Afterwards, four different groups were established at three different sedative concentrations (10, 20, and 30 ppm and a control group without anesthetic additive) for transporting (Trial 2). The study concluded that MPEo and LAEo can be used as anesthetic and sedative agents in tropical fish species safely. The use of 100 µL L–1 (183.5 s AIt and 227.8 s RRt) and 300 µL L–1 (109.2 s AIt and 420.0 s RRt) MPEo and LAEo, respectively, was sufficient for deep anesthesia, whereas concentrations in the range of 10 to 30 µL L–1 are recommended for fish transport.
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İncele - MakaleYalnız künye2018Scopus SJRQ3Anesthetic Efficiency of 2-Phenoxyethanol on Broodstock of Salmo munzuricus, a New Trout Species Originating from Munzur Stream
Karataş, Bilal; Basusta, Asiye; Can, Erkan
Salmo munzuricus Munzur Vadisi Milli Parkı boyunca akan akarsularda yayılım gösteren yeni isimlendirilmiş bir alabalık türüdür. Bu çalışmada, anestetik madde olarak kullanılan 2-fenoksietanolün etkinliği Munzur akarsuyundan yakalanan yerli kahverengi alabalık üzerinde değerlendirilmiştir. Balıklar, 100-200 g (W1), 200-400 g (W2) ve 400-600 g (W3) olmak üzere üç ağırlık sınıfına ayrılmıştır ve çalışma 0.2, 0.3, 0.4 ve 0.5 mL L-1 olmak üzere 4 farklı anestetik konsantrasyonda yürütülmüştür. En kısa indüksiyon zamanı W3 grubunda, en uzun indüksiyon zamanı W1 grubunda bulunmuştur. En kısa anesteziden uyanma süresi W3 grubunda 73.2±3.83 sn sonra ortaya çıkmış ve en uzun uyanma süresi W1 grubunda 136±31.46 sn olarak tespit edilmiştir. W1 grubundaki 2-fenoksietanol konsantrasyonunun artması ile iyileşme süreleri artış göstermiştir. Bununla birlikte, W2 ve W3 gruplarındaki uyanma sürelerinin, W1 grubunda gözlemlenenden genellikle anlamlı derecede daha uzun olduğu belirlenmiştir. Ayrıca balık büyüklüğünün indüksiyon sürelerini ve uyanma sürelerini etkilediği de tespit edilmiştir. Bu çalışmanın sonucu olarak, 2-fenoksietanol için Salmo munzuricus anaçlarında en uygun konsantrasyonlar 100-400 g ağırlık aralığında 0.4 mL L-1, 400-600 g aralığında ise 0.5 mL L-1 olarak belirlenmiştir
AtıfTR Dizin1İncele - Derleme MakaleAçık Erişim2018Aminoacids in freshwater fish
Özçiçek, Esin; Can, Erkan
Proteins, which are the most important substances in the structure of living organism, are polymers of aminoacids with their chemical qualities. Aminoacids can be converted into other substances during metabolism, and can be used in the synthesis of certain chemical structures that the body needs. While more than 90% of the amino acids in the structure of living organisms are present in the protein, the other part is found as free aminoacids in all tissues and body fluids. Fish cannot synthesize all the aminoacids in their body. Unsynthesised aminoacids must be given to fish with feed. The use of proteins in the embryological and larval stages is very important, and free aminoacids are one of the most important components of energy metabolism. Aminoacids are also used as quality indices for various fish species. Studies have shown that freshwater fish require especially essential amino acids. These; arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine. In this study; information on the importance of aminoacids in freshwater fish has been compiled.
AtıfWoS1OpenAlex2İncele - MakaleYalnız künye2018Scopus SJRQ1Anesthetic potential of geranium (Pelargonium graveolens) oil for two cichlid species, Sciaenochromis fryeri and Labidochromis caeruleus
Can, Erkan; Kizak, Volkan; Seyhaneyildiz Can, Şafak; Özçiçek, Esin
The anesthetic potential of geranium oil (Pelargonium graveolens L.) was evaluated in two freshwater aquarium fish species, the electric blue hap (Sciaenochromis fryeri, 2.00 ± 0.61 g) and blue streak hap (Labidochromis caeruleus, 2.31 ± 0.52 g). Fish were exposed to nine concentrations of anesthetic (25, 50, 75, 100, 125, 150, 200, 250, 300 μl L−1). The induction time generally decreased significantly with increasing concentration of geranium oil for both of the fish species. The recovery time increased with the enhancing geranium oil concentration. Deep anesthesia took between 61.19 ± 7.25 s and 165.43 ± 6.78 s for S. fryeri and between 73.32 ± 8.92 s and 171.12 ± 10.74 s for L. caeruleus. Recovery occurred after 96 ± 6.87 s (L. caeruleus), with the longest being 291.45 ± 8.31 s (S. fryeri). The minimal effective concentration was 75 μl L−1 for deep anesthesia for both two species, and 50 μl L−1 was found as the minimal sedative concentration at the stage of loss of equilibrium. These findings suggested that geranium oil is a new potential anesthetic for two ornamental fish species.
AtıfScopus33WoS29OpenAlex34İncele - MakaleYalnız künye2018Scopus SJRQ1Evaluation of anesthetic potential of rosewood (Aniba rosaeodora) oil as a new anesthetic agent for goldfish (Carassius auratus)
Kizak, Volkan; Can, Erkan; Danabaş, Durali; Can, Şafak Seyhaneyildiz
The aim of this research was to investigate the efficacy of rosewood (Aniba rosaeodora) essential oil (EO) as a new herbal anesthetic compared with camphor (Cinnamomum camphora) EO and commonly used chemical agent 2-phenoxyethanol (2-PE) on goldfish (Carassius auratus). The anesthetic efficacies of these herbal EOs and 2-PE were evaluated in goldfish with mean body weight of 7.36 ± 0.77 g. Fish were exposed to each anesthetic concentrations and the lowest effective concentrations (LECs) were established according to deep anesthesia (AD < 3 min) and full recovery (RF < 5 min) times. RD and CP showed anesthetic characteristics and induced AD. The LECs for each anesthetic were established at 250 μl L−1 for RD (AD; RF → 171 ± 2.28 s; 297 ± 7.69 s), 250 μl L−1 for CP (AD; RF → 129 ± 4.18 s; 291 ± 2.81 s) and 700 μl L−1 for 2-PE (AD; RF → 177 ± 2.35 s; 214 ± 4.93 s). At concentrations of 50, 100, 150, 200 μl L−1 for RD, 50, 100, 150 μl L−1 for CP and 400, 500 μl L−1 for 2-PE failed to induce AD in goldfish. There were significantly differences found among RD, CP and 2-PE concentrations in terms of induction and recovery times (p < 0.05). The fastest AD and RF were obtained by 300 μl L−1 CP (120 ± 1.94 s) and 600 μl L−1 2-PE (190 ± 4.34 s), respectively. Fish exposed to 300 μl L−1 RD and 800 μl L−1 2-PE took slightly longer to achieve AD than 300 μl L−1 CP. Induction and recovery times for EOs and 2-PE were significantly dependent on concentrations. Negative relationships was recorded between AD and RF for all anesthetics. No mortality or adverse effects occurred and fish stayed calm during trials. Results showed that RD was found to be an effective anesthetic as well as CP for goldfish and can be used at least 3-fold lower concentrations than 2-PE. In conclusion, rosewood (Aniba rosaeodora) EO, as a new potential anesthetic for fish, proved to be an effective natural agent resulting in rapid induction and recovery.
AtıfScopus25WoS20OpenAlex23İncele - MakaleYalnız künye2018Scopus SJRQ3Anesthetic efficacy of cymbopogon citratus essential oil as a herbal agent in two ornamental fish species
Kizak, Volkan; Can, Erkan; Can, Şafak Seyhaneyildiz; Özçiçek, Esin
The efficacy of Cymbopogon citratus essential oil (CcEO) as a herbal anesthetic agent was evaluated for two ornamental fish species, Sciaenochromis fryeri and Labidochromis caeruleus. Fish were exposed to various essential oil concentrations and the lowest effective concentrations were determined according to deep anesthesia (AD<3 min) and full recovery (RF<10 min) times. CcEO showed anesthetic traits and induced AD in S. fryeri and L. caeruleus. The lowest effective concentrations was 200 µl/L for S. fryeri (AD; RF → 122 ± 1.8 s; 638 ± 8.9 s) and 200 µl/L for L. caeruleus (AD; RF → 139 ± 6.9 s; 625 ± 11.1 s). At concentration of 25 µl/L C. citratus essential oil did not induce AD in both of ornamental fish species. No significant differences were found between fish species in terms of induction and recovery times for same concentrations excluding AD time of 200 µl/L concentration. Although the fastest AD were obtained by 300 µl/L, recovery times were prolonged and fish did not full recover in 20 min. Induction and recovery times for CcEO were significantly dependent on concentrations and negative relationships were recorded between AD and RF. Neither mortality nor adverse effects were observed on two fish species. As a result, CcEO showed anesthetic properties for S. fryeri and L. caeruleus.
AtıfScopus8İncele - MakaleAçık Erişim2018Scopus SJRQ3Anesthetic efficiency of 2-phenoxyethanol on broodstock of salmo munzuricus, a new trout species originating from munzur stream; [Munzur akarsuyu orijinli yeni bir alabalık türü olan salmo munzuricus’un anaç bireyleri üzerinde 2-fenoksietanol’ün anestezik etkinliği]
Can, Erkan; Başusta, Asiye; Karataş, Bilal
Salmo munzuricus is a newly-named species of trout that spreads through rivers flowing along the Munzur Valley National Park. The efficacy of anaesthetic 2-phenoxyethanol was evaluated in indigenous brown trout in the present study. Fish were divided into three weight classes: 100-200 g (W1), 200-400 g (W2) and 400-600 g (W3) and they were exposed to four concentrations of anaesthetic (0.2, 0.3, 0.4 and 0.5 mL L-1). The lowest induction time was identified in the group W3 while the highest one was in the group W1. The lowest recovery time occurred after 73.2±3.83 sec in the group W3 and the highest one was 136±31.46 sec in the group W1. The recovery times were increased with increasing the concentration of 2-phenoxyethanol in the group W1. However, recovery times in the groups W2 and W3 were significantly longer than observed in W1, generally. Besides, it was indicated that fish size affected induction times and recovery times. As a result of the present study, the most appropriate concentrations were determined as 0.4 mL L-1 at weights of 100-400 g while 0.5 mL L-1 at weights of 400-600 g for 2-phenoxyethanol in Salmo munzuricus broodstock.
AtıfScopus4WoS4OpenAlex1İncele - Derleme MakaleYalnız künye2017Akuakültürde sürdürülebilir besin kaynağı olarak mikroalglerin kullanım
Özçiçek, Esin; Can, Safak Seyhaneyildiz; Can, Erkan; Yılmaz, Kadir
Güvenilirliği daha fazla olan besin kaynaklarına duyulan ihtiyaç, hayvansal ürünlere göre özellikle bitki ve alglere olan ilgiyi arttırmıştır. Akuakültürde çeşitli kullanım alanları olan mikroalglerden önemli ölçüde faydalanılmaktadır. Besin olarak kullanılmalarının yanı sıra salmonlarda pigment kaynağı olarak da değerlendirilmektedir. Günümüzde büyük ölçekli ve gelişmiş kalite kontrolü ile elde edilebilen mikroalg üretim sistemlerinin maliyet etkinliğini incelemek için çalışmalar devam etmektedir. Mikroalglerin kullanımında sürdürülebilirliği sağlamak için; biyoteknoloji, biyoişleme ve yönetim prosedürleri gibi farklı alanların entegre olduğu sistemlere dayalı bir yaklaşım gerekmektedir
AtıfTR Dizin4İncele - MakaleYalnız künye2017Scopus SJRQ3SEASONAL CHANGES IN ANTIOXIDANT DEFENCE SYSTEM ON BROWN TROUT (SALMO SP.) IN MUNZUR STREAM
Can, Erkan; Cikcikoglu-Yildirim, Nuran; Erdogan, Devrim
The aim of the present study was to evaluate the oxidant and antioxidant status of the indigenous brown trout (Salmo sp.) caught from Munzur stream (Tunceli, Turkey) at different seasons in different tissues. Glutathione peroxidase (GPx), catalase (CAT), superoxide dismutase (SOD), total antioxidant status (TAS) and total oxidant status (TOS) levels were measured. These measurements were read in a microplate reader using commercial kits with ELISA method. At the end of the study, significant variations of oxidative stress biomarkers were observed between seasons and tissues. The results of this study show that oxidative stress responses in tissues of Salmo sp. are sensitive to the tissues and the seasons in relation to the contaminants, climatic parameters and reproductive period in Munzur stream. The selected parameters are in valuable biomarkers for monitoring of water systems since at molecular levels they give an early warning signal of xenobiotics on aquatic organisms. It was concluded that the measurement of antioxidants biomarkers known such as SOD, CAT and GSH-Px activities, TAS and TOS levels may also be promising indicators of an oxidant impact on aquatic organisms.
AtıfWoS2İncele - MakaleYalnız künye2017Scopus SJRQ3The efficacy of chamomile (Matricaria chamomilla) oil as a promising anaesthetic agent for two freshwater aquarium fish species
Can, Erkan; Kizak, Volkan; Özçiçek, Esin; Seyhaneyildiz Can, Şafak
The efficacy of anesthetic chamomile oil (from Matricaria chamomilla L.) was evaluated in two freshwater aquarium fish species, Electric Blue Hap (Sciaenochromis fryeri) and Yellow Princess (Labidochromis caeruleus). Fish were exposed to ten concentrations of anesthetic (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0 ml/L). The optimal concentrations identified as 0.6 ml/L for deep anesthesia (A5) for both two species. The minimal sedative concentration at the stage of loss of equilibrium (A3) was found to be 0.3 ml/L. The induction time generally decreased significantly with increasing concentrations of chamomile oil for all treatment groups. Recovery time tended to increase with increased chamomile oil at concentrations lower than 0.7 ml/L, but after this concentration it decreased. Chamomile oil proved to be effective as an anesthetic for both ornamental fish species. These findings suggest that chamomile oil is a promising anesthetic agent for aquaculture. However, further studies should be focused on species based investigations on the effect of temperature, transfer of fish, and their effect on antioxidant and oxidant status, in order to gather further information.
AtıfScopus10İncele - MakaleYalnız künye2015Scopus SJRQ3EVALUATING THE DILUTION OF MUNICIPAL WASTEWATER ON BIOMASS INCREASE, LIPID PRODUCTION AND NUTRIENT REMOVAL BY THE BLUE-GREEN ALGAE Spirulina platensis (Geitler)
Can, Safak Seyhaneyildiz; Demir, Veysel; Can, Erkan
Wastewater generated daily in urban localities could provide nourishment to algae for potential production of biofuel and biochemicals. This study presents an integrated approach to the use of Spirulina platensis cultures for the treatment of domestic wastewater and lipid extraction. In this experimental approach, wastewater subjected only to the primary settling process was used as nutrient media at different concentrations of 100%, 75%, 50%, and 25% wastewater diluted with distilled water, and Spirulina platensis was cultured in these mediums for 20 days. The inoculated medium was incubated at 30 degrees C in the presence of light (42 mu mol photon m(-2).s(-1)) by using light/dark cycle of 12 hours. S. platensis consumed nitrite, nitrate, phosphate and ammonium from wastewater, and it increased its biomass and its lipid amount. Although the highest biomass increase was observed at the wastewater medium without dilution (100% wastewater) (the control group was not included), the highest lipid production was found in 25% wastewater. On the other hand, the percent reduction in the level of nitrite, nitrate, phosphate and ammonium in 75% wastewater medium was 91%, 99%, 99% and 99%, respectively. Despite the low lipid content, since Spirulina platensis can live in harsh conditions and increase its biomass rapidly, they can be easily cultivated in wastewater. Therefore, their use in wastewater for biodiesel production was found appropriate. The resulting algae biomass after oil extraction can be also used in different industrial sectors.
AtıfWoS5İncele - MakaleAçık Erişim2014Scopus SJRQ3EFFECT OF DIETARY KEFIR ON THE DIGESTIVE AND LIVER ENZYMES ACTIVITIES AND GLUCOSE LEVEL OF CORUH TROUT, SALMO CORUHENSIS (ACTINOPTERYGII: SALMONIFORMES: SALMONIDAE)
Can, Safak Seyhaneyildiz; Kutluyer, Filiz; Can, Erkan; Kayis, Sevki; Sonay, Fatma Delihasan; Köse, Ozay; Aksu, Onder; Erdamar, Husamettin; Yigitoglu, M. Ramazan; Kayim, Murathan
The probiotics are very important for aquaculture because of their role in enhancing the fish health status, improving disease resistance, growth performance, and body composition, reducing malformations, improving gut morphology and the overall microbial balance. The objective of the presently reported study was to investigate effects of kefir as a probiotic product on the digestive and hepatic enzyme activities, as well as glucose level of Coruh trout, Salmo coruhensis Turan, Kottelat et Engin, 2010. The experiment was performed with four treatments: control group (no kefir), D1, D2, and D3 (kefir-supplemented diet: 10, 20, and 40 g . kg(-1) fish body mass, respectively). The activity of: alanine aminotransferase (ALT), aspartate aminotranferase (AST), lactate dehydrogenase (LDH), lipase, amylase-as well as the glucose levels were determined after 4 months. The results indicated that glucose levels (P < 0.05) and digestive enzymes (lipase and amylase) in the blood serum decreased in fish fed diets containing kefir (P > 0.05). On the contrary, the activity of liver enzymes (ALT, AST, and LDH) increased insignificantly (P > 0.05). In conclusion, digestive and liver enzyme activities were affected by quantitative changes in dietary kefir insignificantly but further research is needed to establish whether the liver and digestive enzyme physiology of Coruh trout can be affected by kefir-supplemented diets in a long-term trial.
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