Hijran Yavuzcan

Hijran Yavuzcan
Ankara University · Department of Fisheries and Aquaculture

Professor
RESEARCH

About

73
Publications
19,207
Reads
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953
Citations
Additional affiliations
April 2011 - April 2014
Ankara University
Position
  • Head of Department
Education
October 1999 - December 2000
Ludwig-Maximilians-University of Munich
Field of study
  • Fish Diseases, crayfish plaque

Publications

Publications (73)
Article
Full-text available
Previous reviews of stress, and the stress hormone cortisol, in fish have focussed on physiology, due to interest in impacts on aquaculture production. Here, we discuss cortisol in relation to fish welfare. Cortisol is a readily measured component of the primary (neuroendocrine) stress response and is relevant to fish welfare as it affects physiolo...
Article
Full-text available
Exposure of Nile tilapia, Oreochromis niloticus (mean weight, 55.72 ± 4.30 g), to two sublethal NO2–N concentrations was studied for 24 and 48 h in a static test. In nitrite exposure tests, the percentages of methemoglobin, external nitrite, plasma nitrite, hemoglobin and hematocrit were assessed. Nitrite exposure in the range of 0.50 and 1.38 mg l...
Article
Full-text available
This study evaluated the seasonal nutrient content and trace element composition of the great Mediterranean scallop (Pecten jacobaeus), which is among the economic scallop species. The samples were obtained as by-catch from the trawler nets of commercial fishing boats operating in the Gulf of Antalya seasonally between 2017 and 2018. After determin...
Conference Paper
Wild fish refers to the caught fish and other living organisms from the wild (sea, ocean, lake) aiming to be consumed as seafood. Farmed fish (aquaculture) refers to the controlled process of cultivating aquatic organisms. Seafood (fish and other aquatic organisms) is considered desirable in the human diet. Seafood contains an important source of p...
Article
Full-text available
The overall fish welfare in sea-caged European sea bass (Dicentrarchus labrax) was quantitatively assessed by adapting the Salmon Welfare Index Model (SWIM 1.0). In the model, a total of 16 operational welfare indicators in three segments (i) individual fish-based; (ii) fish-group specific; and (iii) sea cage environment-specific indicators were ev...
Article
Infestation by parasitic copepods is a substantial problem in the cage culture of European sea bass (Dicentrarchus labrax). The Copepoda parasite, Lernanthropus kroyeri (Lernanthropidae), is one of the threats to the mariculture of sea bass. In the present study, we evaluated the data of abundance for L. kroyeri pre‐adults and adult males (PAAM) an...
Article
Full-text available
The Monogenean parasite, Dactylogyrus sp., is being considered as one of the most dangerous pathogens in freshwater fish with a high infestation in common carp (Cyprinus carpio). The treatment of parasites including Monogeneans is an important part of fish health maintenance in the overall cycle of aquaculture. Novel applications of natural plant p...
Chapter
Full-text available
Global Climate Change is a scientifically well-established reality of the 21st Century. The elevated concentration of greenhouse gases in the atmosphere, resulting from human activities such as the burning of fossil fuels and deforestation is leading to global warming. It is well perceived that the aquatic environment will be amongst the most sever...
Article
The Monogenean parasite, Dactylogyrus sp., is being considered as one of the most dangerous pathogens in freshwater fish with a high infestation in common carp (Cyprinus carpio). The treatment of parasites including Monogeneans is an important part of fish health maintenance in the overall cycle of aquaculture. Novel applications of natural plant p...
Article
Full-text available
One of the constraints in fish disease management in aquaponic systems is related to undesired effects of chemicals on fish, plants and beneficial bacteria. Plant-derived compounds with nontoxic features to fish, plants, and microflora provide an alternative treatment strategy against the harmful pathogens in the aquaponic system. The present study...
Conference Paper
Full-text available
Cyprinus carpio and mint, Mentha spp., semi-quantitatively. The experiment was carried out in the one-loop aquaponic system. Carp with the weight of 30-50 g were stocked at two different ratio: 30kg/m3 (GroupI-low stocking density) and 50kg/m3 (GroupII-high stocking density). Fish were fed with 45% raw protein at the level of 2% body weight for 4 w...
Chapter
Full-text available
This chapter provides an overview of possible strategies for implementing aquaponics in curricula at different levels of education, illustrated by case studies from different countries. Aquaponics can promote scientific literacy and provide a useful tool for teaching the natural sciences at all levels, from primary through to tertiary education. An...
Chapter
Full-text available
Increased public interest in aquaponics necessitates a greater need to monitor fish health to minimize risk of infectious and non-infectious disease outbreaks which result from problematic biosecurity. Fish losses due to health and disease, as well as reporting of poor management practices and quality in produce, which could in a worst-case scenari...
Article
The effects of biofloc technology (BFT) were tested on growth performance, water quality, haemolymph parameters and hepatopancreas histology with and without BFT for the speckled shrimp. In this study, eight different experimental groups were formed (four BFT and four control groups) to measure the effects of different feeding rates on compensatory...
Article
Full-text available
The bioactive compounds of detrital leaves of seaweed, 􀀑􀀞􀀢􀀣􀀖􀀡􀀒 spp. found as beach-cast were investigated by thin layer chromatography (TLC) and high performance liquid chromatography (HPLC). Extracts of methanol, ethyl acetate, and 􀀝-hexane of detrital 􀀑􀀞􀀢􀀣􀀖􀀡􀀒 spp. leaves collected from Coasts of Aegean Sea, Izmir (Turkey) were used to determine t...
Article
Full-text available
The copepod parasite Lernantropus kroyeri impairs the productivity of European sea bass (Dicentrarchus labrax) culture by leading to a direct infection or as a vector for other disease agents. In current conditions, the parasitic infections in mariculture are usually treated with the chemicals, mainly with the pesticides. However, therapeutic chemi...
Article
Full-text available
The bioactive compounds of detrital leaves of seaweed, Zostera spp. found as beach-cast were investigated by thin layer chromatography (TLC) and high performance liquid chromatography (HPLC). Extracts of methanol, ethyl acetate, and n-hexane of detrital Zostera spp. leaves collected from Coasts of Aegean Sea, Izmir (Turkey) were used to determine t...
Article
Full-text available
Fish are considered to be sentient and capable of perceiving and experiencing pain. Fish welfare in farming conditions can be interpreted with regard to ethics, economic viability, legal issues and consumer's perspectives. Fish welfare is directly related with the economic inputs such as stocking density, mortality and growth rate, affecting the pr...
Conference Paper
Full-text available
Article
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Z Akvaryum balıklarının ticareti ile ülkeler arası patojen transferi, günümüzde en önemli patojen yayılım risk-lerinden birisidir. Akvaryum balığı ticareti ile Türkiye'ye giren parazit tehlikesini irdelemek üzere Türkiye'ye ithal edilen 50 altın balık (Carassius auratus auratus) ve 10 dişi kılıçkuyruk balığı (Xiphophorus hellerii) Aralık 2015 ve Ek...
Book
In aquaculture, stress related disease problems which are leading to serious limitations in sustainability of the sector are of major importance however, stressors in aquaculture are unavoidable. In terms of characteristics of interaction of stress and health in aquaculture, stress physiology has been the center of attention. In fish, the physiolog...
Article
Full-text available
The present study reports the results of the production of Nile tilapia (Oreochromis aureus) and tomato (Solanum lycopersicum) in the classical aquaponic system (one-loop) with different fish density. The experiment as the first scientific aquaponics study in Turkey was conducted at the Ankara University, Faculty of Agriculture, using indoor , smal...
Article
Full-text available
The present study reports the results of the production of Nile tilapia (Oreochromis aureus) and tomato (Solanum lycopersicum) in the classical aquaponic system (one-loop) with different fish density. The experiment as the first scientific aquaponics study in Turkey was conducted at the Ankara University, Faculty of Agriculture, using in-door, smal...
Article
Full-text available
Aquaponics is the combination of aquaculture (fish) and hydroponic cultivation of plants. This review examines fish welfare in relation to rearing water quality, fish feed and fish waste and faeces to develop a sustainable aquaponic system where the co-cultured organisms, fish, bacteria in biofilters and plants, should be considered holistically in...
Article
This research aims to discover the effects of different pressure shocks, heat shocks and times after fertilization on the formation of tetraploid rainbow trout at the stages of eyed eggs, yolk-sac larvae, feed started fry. This research was designed using factorial completely randomized design consisting of three main treatments i.e. pressure shock...
Conference Paper
Full-text available
T. J. 2015. Phenotypic and molecular characterization and pathology of Flectobacillus roseus causing flectobacillosis in captive held carp Labeo rohita (Ham.) fingerlings. Aquaculture 439 (2015) 60–65 • Jezbera J., Jezberová J., Brandt U. Ve Hahn M. V. 2011. Ubiquity of Polynucleobacter necessarius subspecies asymbioticus results from ecological di...
Conference Paper
Full-text available
Bu çalışma, AÜZF Çifteler Su Ürünleri Araştırma ve Uygulama merkezinde bulunan sazan, alabalık ve mersin balıkları havuz suları kullanılarak yürütülmüştür. 3 farklı balık türünün yetiştiriciliğinin yapıldığı havuzlar ve bu havuzların giriş/çıkış sularındaki baskın bakteri türünü tespit etmek amacıyla çevresel DNA tekniği kullanılmıştır. Su örnekler...
Article
Full-text available
The purpose of this study was to determine whether gilthead sea bream and sea bass treated with combination of trimethoprim and sulfamethoxazole (TMP-SMX) differed in terms of physiological and innate immune biomarkers. Fish were exposed to TMP-SMX at 40 ppm concentration for 1 h as a prophylactic usage. Plasma cortisol, glucose, electro-lytes (Ca,...
Article
Full-text available
Stress in gilthead sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax) externally exposed to formalin was evaluated by measuring stress indicators; plasma cortisol, glucose, calcium (Ca), phophorus (P), sodium (Na), potassium (K), chloride (Cl), magnesium (Mg), hematocrit, and innate immunity parameters; C-reactive protein (CRP), cerulopl...
Article
Full-text available
Changes of plasma lysozyme and serum bactericidal activity, ceruloplasmin, total plasma protein, serum glucose, hematocrit and leucocrit levels in rainbow trout (Oncorhynchus mykiss) were studied after exposure to formalin and chloramine-T, which are used in aquaculture as anti-ectoparasitic and antibacterial agents. Fish were exposed to formalin a...
Article
Full-text available
The aim of the present study was to set up reference intervals for biochemical parameters in new candidate species of Mediterranean marine fish culture—striped sea bream, Lithognathus mormyrus and common dentex, Dentex dentex as well as traditionally cultured species—gilthead sea bream, Sparus aurata. The reference biochemical values were assessed...
Article
Rainbow trout (Oncorhynchus mykiss) cage-cultured in Kesikkopru Dam Lake were examined for ectoparasites on body surface, gills and fins between December 2004-June 2005. During study period, six parasite genera covering only protozoons were detected. General prevalance of detected parasites was found to be 90%. General parasite prevalence in the pr...
Article
Full-text available
Leteux-Meyer mixture (LMM) contains formalin and malachite green and can be externally applied to fish as an antimicrobial agent. To determine the effects of prophylactic treatment with LMM on plasma lysozyme levels and the secondary stress indices, alterations in plasma glucose, chloride, sodium, potassium and hematocrit were monitored in healthy...
Article
Full-text available
Turkey is a passage-land between the Balkans and the Middle East with three percent of its landmass (Thrace) lying in Europe and 97 percent (Anatolia) in Asia. Turkey is a large penissula surrounded by three major water-bodies, the Mediterranean Sea, the Aegean Sea and the Black Sea and the smaller sea of Marmara (Fig 1). The climate, water resourc...
Article
Full-text available
The secondary stress response of Nile tilapia, Oreochromis niloticus after direct transfer to saline water was evaluated assessing the levels of hematocrit, plasma glucose, sodium, potassium, chloride and calcium. Fish were transferred directly from freshwater to two experimental salinity (9 and 18 ppt) for 72 hours. Plasma glucose, Na + , K + , Cl...
Article
Platies (Xiphophorus maculatus), goldfish (Carassius auratus), angelfish (Pterophyllurn scalare) and guppies (Poecilia reticulata) imported into Turkey between October 2004 and March 2005 were examined for the metacercarial cysts of Centrocestus formosanus. Metacercariae of C. formosanus were only found encysted on the gills of examined fish. The p...
Article
Full-text available
Changes in renal tissues and plasma osmolality were investigated in Nile tilapia (Oreochromis niloticus) 72 hours after transfer from fresh water to 9 or 18 ppt salinity. Exposure to high salinity was associated with cell infiltration into renal tissue. Plasma osmolality increased with increasing salinity but the hematocrit remained unchanged.
Article
Full-text available
The 48-h acute toxicity range of nitrite to narrow-clawed crayfish, Astacus leptodactylus was within 22 and 70 mg L(-1) (mean 29.43 mg L(-1)). Environmental chloride (100 mg L(-1) chloride) increased the 48-h toxicity of nitrite to a range of 31 and 80 mg L(-1) (mean 49.20 mg L(-1)). Hemolymph nitrite, total hemocyte counts (THCs), and hemolymph gl...
Article
Full-text available
The results of the blood analysis of spontaneous infected versus clinically healthy tilapia (Table 1) showed: (a) significant reduction (P<0.01) in haematocrit, haemoglobin, erythrocyte, total plasma protein, Mg2+, K+, Na+, Cl− in infected tilapia; (b) significant increases (P<0.01) in the total leukocyte number and plasma glucose in infected fish...
Article
Full-text available
Tench (Tinca tinca) were sampled between October 2002 and February 2003 in Lake Beysehir and examined for Ligula intestinalis plerocercoid infestation. Prevalence ranging from 41.66% ± 8.33 to 84.52 ± 1.19, decreased with increasing fish size. Index of parasitization (I p) did not differ among the fish length classes however, monthly fluctations in...
Article
Full-text available
Three haemocyte groups were identified in the freshwater crab, Potamon fluviatilis: hyalinocytes, semigranulocytes and granulocytes. The proportion of hyalinocytes was found to be 15%, that of semigranulocytes 54.25% and that of 30.75% granulocytes.
Article
Full-text available
As grass carp culture for vegetation control in freshwater is a new field in Turkey the disease problems of grass carp have not been well documented. Spontaneous disease occurrence in the course of grass carp culture was reported in the present study. During the culture of grass carp (Ctenopharyngodon idella) some disease problems occurred causing...
Article
Full-text available
To determine the effects of exposure to a mixture of formalin, malachite green and methylene blue (FMC) on the secondary stress indices, changes in glucose, phosphorus, calcium, magnesium, sodium, potassium and haematocrit were monitored in healthy Nile tilapia, Oreochromis niloticus L. Fish were exposed separately to varying concentrations of a mi...
Article
The stress response of grass carp to salinity was evaluated assessing the levels of hematocrit, leucocrit, plasma glucose, sodium, potassium and calcium. Mean hematocrit values increased following exposure to salinity. Mean leucocrit values elevated after exposure to salinity for 24 h, then decreased. Mean plasma glucose increased during saline exp...
Article
Intensively cultured rainbow trout (Oncorhynchus mykiss) in Central Anatolia, Turkey, developed nephrocalcinosis. Macroscopically examined kidneys were swollen. Ureters dilated two or three-fold had a sinuous appearance and were filled with a caseous material. Histopathologically examined kidneys had renal calcifications generally located at the co...
Article
Different blood parameters (hematocrit, leukocrit, number of erythrocytes, total leukocytes and trombocytes, total plasma protein, albumin and plasma Na+, K+, Ca++, and P) were investigated in Pseudomonas fluorescense infected and non-infected carp. Results showed a significant decrease of hematocrit, erythrocyte number, total plasma protein albumi...
Article
In this research, the effect of chicken manure on the productivity of benthic fauna in the carp ponds was examined. Chicken manure in a fluid form was applied 5 kg/ha/day. The abundance (numbers/m2) and biomass (g. wet weight/m2) of benthic organisms were determined in a group of ponds: Control (Group I.), manured (Group II), manured and pellets co...
Article
Full-text available
Özet: Çalişmada, 2 yaşli, 6 adet sazanda (Cyprinus carpio L.) gözlenen deri lezyonlari makroskobik, histopatolojik ve elektron mikroskobik olarak değerlendirildi. Deride, boz beyaz fokal odaklar halinde gözlenen lezyonlardan alinan doku örneklerinde, epidermal hiperplazi, vakuoler dejenerasyon ve intrasitoplazmik inklüzyon cisimciklerine rastlanirk...
Article
Türkiye’de yetiştiricilik yoluyla elde edilen su ürünleri üretimi sürekli bir gelişim göstermesine rağmen sektör, gelişimin sürdülebilirliğini etkileyen hastalık problemleri ile karşı karşıyadır. Üretimin artışına paralel olarak hastalık problemleri de oransal olarak artış göstermektedir. Su ürünleri yetiştiriciliğinde hastalık problemlerinin çözüm...

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Projects

Projects (6)
Project
SWIM 1.0 (Stien et al) will be integrated to sea bass and sea bream aquaculture in order to obtain routine fish welfare parameters based on real fish welfare criteria. By this proposed Project, fish welfare and marine aquaculture would bridge the gap regarding fish health management in sea bass and sea bream.