Yazar "Er, Akif" için listeleme
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Acute toxicity and histopathological assessment of bisphenol a in danube sturgeon (Acipenser gueldenstaedtii) larvae
Minaz, Mert; Er, Akif; Ak, Kübra; Kurtoğlu, İlker Zeki; Kayış, Şevki (HARD Publishing Company, 2024)Bisphenol A (BPA), an important component of the plastics industry, is characterized as an endocrine disrupting toxic substance for aquatic organisms. This study focused on the toxic effects of BPA on endangered Danube ... -
Acute toxicity of pozzolanic cement on two crustacean species, water flea (Daphnia magna) and gammarus komareki
Er, Akif; Kayış, Şevki (Springer, 2021)This study was conducted to determining the values of LC50, mortality rates and DNA damages (Daphnia magna) of species exposed to pozzolanic cement concentrations of 50, 100, 150, 200, 250, and 300 mg/L for 24 h. To compare ... -
Aeromonas hydrophila as a causative agent of blue sac fry syndrome in different trout species
Kayış, Şevki; Er, Akif; Yılmaz, Ceyran; Düzgün, Ahmet; Köse, Özay; Kurtoğlu, İlker Zeki (Wiley-Blackwell, 2015)Blue sac fry syndrome (BSFS) occurs in alevins of rainbow trout Oncorhynchus mykiss (Walbaum) and brook trout Salvelinus fontinalis, (Mitchill) and can cause substantial losses during the incubation period. It is generally ... -
Assessment of hematological indicators, histological alterations, and DNA damage in Danube sturgeon (Acipenser gueldenstaedtii) exposed to the organophosphate malathion
Er, Akif; Minaz, Mert; İpek, Zeynep Zehra; Ak, Kübra; Kurtoğlu, İlker Zeki; Kayış, Şevki (Elsevier, 2023)This study focused on organophosphate malathion toxicity in Danube sturgeon (Acipenser gueldenstaedtii) and its negative effects in sub-lethal concentration. In this context, the LC50 value of fish exposed to five different ... -
Bacterial and Parasitic Pathogens Isolated from Some Wild Cyprinid Fishes
Kayıs, Sevki; Duzgun, Ahmet; Er, Akif (2018)Abstract: Parasitic and bacterial fish pathogens present on the wild fish in Deriner Dam Lake in Turkey on the Coruh River were determined in the present study. In total 127 wild fish (6 different species) were sampled ... -
Bacterial examination of wild and cultured fish present in the same aquatic ecosystem, and the antibiotic resistance of the isolated bacteria
Bingöl, Ahmet; Er, Akif; İpek, Zeynep Zehra; Kayış, Şevki (Central Fisheries Research Inst, 2022)This study investigated the bacteria present in natural and cultured fish species from the same aquatic system, and difference of their antibiotic resistance. A total of 129 fish, Georgian shemaya (Alburnus derjugini), ... -
Bacterial pathogens and health problems of Acipenser gueldenstaedtii and Acipenser baerii sturgeons reared in the eastern Black Sea region of Turkey
Kayış, Şevki; Er, Akif; Kangel, P.; Kurtoğlu, İlker Zeki (Shiraz Univ, 2017)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 ... -
Bisphenol a used in plastic industry negatively affects wild vimba bream (Vimba vimba)
Minaz, Mert; Er, Akif; Nane, İkbal Demet; İpek, Zeynep Zehra; Aslankoç, Rahime (Central Fisheries Research Inst, 2023)Used as a component of polycarbonate plastics and epoxy resins in the modern industrial world, bisphenol A (BPA) is one of the highest volume produced industrial chemicals worldwide. BPA causes important environmental ... -
Comparison of the efficacy of two phenotypic identification kits and classic PCR methods to identify Aeromonas hydrophila isolated from fish farms
Balcı, Şerafettin; Er, Akif; İpek, Zehra; Kayış, Şevki (ScientificWebJournals (SWJ), 2023)In recent years, phenotypic identification kits have been reported to give incorrect results in identifying Aeromonas species, whereas molecular identification is quite reliable. In this context, Aeromonas hydrophila ... -
Dandelion root extract in trout feed and its effects on the physiological performance of Oncorhynchus mykiss and resistance to Lactococcus garvieae infection
Köse, Özay; Karabulut, Huriye Ariman; Er, Akif (Walter de Gruyter, 2023)In this study, we investigated the dietary effects of dandelion root extract (DRE) on growth performance, body composition, serum biochemical parameters, intestinal and liver histology, and fish resistance against Lactococcus ... -
Decade of microplastic alteration in the southeastern black sea: An example of seahorse gastrointestinal tracts
Onay, Hatice; Minaz, Mert; Ak, Kübra; Er, Akif; Emanet, Muhammet; Karslı, Barış; Bilgin, Sabri (Elsevier, 2022)Unconscious and excessive use of plastic supports the diversity and abundance of microplastics (MPs) in marine environments. As a result of MP exposure, organisms in the marine environment are faced with adverse scenarios up ... -
Determination of bacterial contamination and antibiotic resistance of the bacteria in the some trout farm hatcheries in the Eastern Black Sea region of Turkey
Kayış, Şevki; Soyköse, Gökhan; İpek, Zeynep Zehra; Er, Akif (Egirdir Fisheries Research Institute, 2021)This study was carried out to reveal bacterial contamination and antibiotic resistance profiles of isolated bacteria in the hatchery systems of trout farms located in the Eastern Black Sea region of Turkey. Inlet water, ... -
Doğu Karadeniz'de yayılım gösteren Nerocila spp.' nin konakçı hassasiyetinin belirlenmesi
Er, Akif (Recep Tayyip Erdoğan Üniversitesi / Fen Bilimleri Enstitüsü / Su Ürünleri Anabilim Dalı, 2013)Bu tez çalışmasında Doğu Karadeniz kıyılarında yayılım gösteren Nerocila spp. bireylerinin konakçı hassasiyeti, değişik metotlar (uzatma ağları, serbest dalış, olta ve gırgır) kullanılarak gerçekleştirilmiş ve izopodların ... -
Effect of pozzolanic cement exposure in nile tilapia (Oreochromis niloticus)
Er, Akif; Minaz, Mert; Kayış, Şevki (İstanbul University Press, 2024)Cement used in structures such as bridges, dams, and retaining walls built on the aquatic ecosystem harms different organisms. The current study reveals the effect of pozzolanic cement (PC) on Nile Tilapia (Oreochromis ... -
Effects of ceramic balls on trout welfare during their live transfer conditions
Akdemir, Gülperi; Er, Akif; İpek, Zeynep Zehra; Minaz, Mert; Kayış, Şevki (Ege Üniversitesi, 2022)The effects of ceramic balls on live transfer conditions of rainbow trout (Oncorhynchus mykiss, (Walbaum,1792)) were determined by examining ammonia, pH, dissolved oxygen, and temperature of water and gill histology of ... -
Effects of concrete additives on vital tissues of rainbow trout (oncorhynchus mykıss): A histological examination
Er, Akif; Öztek, Özgür; Kayış, Şevki (Parlar Scientific Publications (P S P), 2019)The construction of reinforced concrete structures in aquatic systems and water basins has now become an inevitable need. Concrete structures, both simple and large, such as retaining walls, the design of landscape areas, ... -
Effects of feed rations containing egg powder in different proportions on growth performance, feed utilization, body composition and survival rate of rainbow trout (Oncorhynchus mykiss Walbaum, 1792) fry
Köse, Özay; Karabulut, Huriye Arıman; Kurtoğlu, İlker Zeki; Er, Akif (Ege Üniversitesi Su Ürünleri Fakültesi, 2021)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 ... -
Effects of lactococcus lactis and bacillus sp. on hatchery performance of Rainbow trout (oncorhynchus mykiss) eggs until larval stage
Piranlıoğlu, Engin; İpek, Zeynep Zehra; Er, Akif; Minaz, Mert; Kayış, Şevki (Isparta Uygulamalı Bilimler Üniversitesi, 2023)In this study, the effect of Lactococcus lactis and Bacillus sp. (Gram-positive bacteria) on survival rates of rainbow trout (Oncorhynchus mykiss) from egg to larval stage was investigated. In addition, the effects of ... -
Evaluation of antibacterial activity of Green Tea (Camellia sinensis L.) seeds against some Fish pathogens in Rainbow Trout (Oncorhynchus mykiss, Walbaum)
Mikroorganizmalarda antibiyotiklere karşı direnç gelişimi, yeni antibakteriyel bileşiklere olan ihtiyacın artmasına neden olmuştur. Bu çalışmada, yeşil çay (Camellia sinensis L.) tohumu ve onun ikincil bir metaboliti olan ... -
Farklı balık türlerinde bakterilerden kaynaklı deri lezyonları
Kayış, Şevki; Er, Akif (2014)Balıklarda sıklıkla rapor edilen hastalıkların semptomları benzerdir, fakat bu semptomlar değişik faktörler sonucu meydana gelmektedir. Bu çalışmada Gram negatif, sitokrom oksidaz pozitif olan bakterilerin farklı balıklarda ...
