Derya Güroy

Derya Güroy
Yalova Üniversitesi · Armutlu Vocational School, Aquaculture

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66
Publications
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Introduction

Publications

Publications (66)
Article
Full-text available
The present study evaluated the effects of a dietary mix of marine sulphated polysaccharides, named Algimun® (AL), supplementation to gilthead seabream (Sparus aurata) juveniles in terms of growth performance, immune responses, and resistance against Photobacterium damselae sbsp. piscicida. A total of 240 fish (initial mean weight of 6.00 ± 0.03 g)...
Article
Full-text available
In this study, the effect of dietary Spirulina (Arthrospira platensis) on color intensity, growth performance, total ammonia–nitrogen excretion (TAN), and profitability of common clownfish (Amphiprion ocellaris) was investigated. Three isoproteic (46%) and isolipidic (13%) diets were formulated as one control (C) and two different levels (15 and 30...
Article
Full-text available
Spirulina's industrial use depends on its sustainability and economic production. Geothermal water sources are well known potential water sources for Spirulina' slow-cost production. This research aimed to study the effects on Arthrospira (Spirulina) platensis culture of Sanlıurfa (Karaali) geothermal water. Spirulina was cultured in a 2000 mL Erle...
Article
This research was conducted to reveal the effects of dietary Spirulina (Arthrospira platensis) meal on the growth performance, immune responses and resistance against Vibrio anguillarum in European seabass (Dicentrarchus labrax). In the study, the fish (5.74 ± 0.02 g) were fed with control (C) and three different levels (1%, 2.5% and 5%) of Spiruli...
Article
The present study aimed to evaluate the possible effects of a natural hepatomodulator on growth; some biological, blood, and color parameters; body; cost analysis; and liver histology of rainbow trout. A commercial rainbow trout diet was used for the control group, and 500 mg kg⁻¹ of commercial additive was used for the treatment group. The experim...
Article
In this study, the effects of six different dietary levels of commercial surface‐modified clinoptilolite (Minazel Plus® [MP]; 0, 1, 1.5, 2, 2.5 and 3 g kg−1) were observed for fingerling gilthead sea bream in recirculating aquaculture system (RAS) for 60 days. All experimental groups showed higher final weight, weight gain and specific growth rate...
Article
Full-text available
Abstract: In this study, African catfish (Clarias gariepinus) was examined at the controlled condition in recirculating aquaculture system (RAS). In the experiment, three different dietary prebiotics (FOS: fructooligosaccharide, GOS: galactooligosaccharide and MOS: mannanoligosaccharide) in two levels (1g/kg and 2 g/kg) and a control diet were tes...
Article
In this study, two different experiments were carried out in green tiger shrimp to evaluate the culture conditions under BFT and clear water applications using recirculation aquaculture systems (RAS). In the first experiment, the effects of four different feeding rates (3, 6, 9 and 12% body weight (BW) day⁻¹) were determined comparatively in BFT an...
Article
In the present study, the effects of five different feeding frequencies including every other day (2F1), one (F1), two (F2), three (F3), and four (F4) times daily on growth, reproduction, the coloration of rusty cichlid (mean body weight 2.04 ± 0.01 g and mean total length 4.35 ± 0.01 cm) were investigated. The trial was carried out in 15 100-L fib...
Article
This study was carried out to determine the effects of fish meal or plant‐based diets with supplementation of dietary Spirulina (4%) on shelf life of rainbow trout, Oncorhynchus mykiss. Rainbow trout (initial weight: ~135 g) were fed four experimental diets (fish meal‐based FM, plant meal‐based‐PM, Spirulina included at 4% of fish meal‐based‐FM/S o...
Article
Full-text available
The white grouper is a desirable aquaculture species that adapts to captivity, grows well and commands a high market price. However, little is known about reproductive biology or control of sex reversal of this protogynous hermaphrodite. In this study, female white groupers were implanted with one dose of 17α‐methyltestosterone (10 mg/kg body weigh...
Article
Full-text available
Bu çalışmada, balık unu yerine soya fasulyesi unu ve keten tohumu küspesi kullanımının Rus mersin balığında (Acipenser gueldenstaedtii) büyüme, vücut kompozisyonu, kan ve serum parametreleri üzerine etkileri incelenmiştir. İzonitrojenik (% 49 protein) ve izolipidik (% 20 yağ) olmak üzere beş deneysel yem formüle edilmiştir. Yemler, kademeli seviyel...
Article
A 12-week feeding trial was conducted to estimate the effects of supplemented amino acids (lysine and methionine) with different dietary protein levels on growth, haematology and liver histology in meagre (Argyrosomus regius) at two different sizes: fingerling (15.2 g) and juvenile (44.4 g). Six practical diets were prepared, and three of these pra...
Article
Full-text available
Using of alternative plant/animal based (except fish meal) raw materials is one of the most important application for decreasing feed cost in finfish feeds. Meagre which is demanded from many countries because of its efficient meat quality and flovur and showed rapid growth under culture conditions is a potential species. A nutrition trial with mea...
Article
Full-text available
Kenyi cichlids belong to mbuna group which is specific to Lake Malawi. Gender discrimination is easy because males have yellow, females have blue colors and their spawning efficiency is good. Cichlid producers prefer kenyi cichlids in recent years due to reproduction performance and coloring of kenyi. In this study, effects of Spirulina-based diet...
Poster
Full-text available
Conferance paper Derya GUROY; Onur KARADAL; Serhan MANTOGLU; Betul GUROY; Olcay SIMSEK; Orhan Tufan EROLDOGAN; M. Ayce GENC; Ercument GENC
Article
Full-text available
Evliyaoglu, E., Yilmaz, H., Genc, E., Genc, M., Aktas, M., Guroy, D., Eroldogan, O. (2016). Accellerating Masculinization of White Grouper Epinephelus aeneus (Geoffroy Saint Hilaire 1817) Individuals with Aromatase Inhibitor and 17-Methyltestosterone Hormones. Natural and Engineering Sciences, 1(3), Supplement, 45. SUPPLEMENTARY ABSTRACTS OF ORAL...
Article
Full-text available
Albinism, a genetic disorders of the melanin system in which the synthesis of this pigment is reduced or lacking, occurs in all classes of vertebrates and in invertebrates. It has seen in many fish species in the natural environment. Cichlids which are one of the most exhibited groups in aquarium sector. Especially powder blue (Pseudotropheus socol...
Article
Full-text available
Balık üretiminden kaynaklanan kirlilik, yemin fiziksel özellikleri, kimyasal özellikleri ve uygulanan yemleme yönetiminden meydana gelmektedir. Yemin ekstruder teknolojisi ile üretilmesi, yemin sudaki dayanıklılığını arttırarak toz ve kırıkların oluşmasını önlemektedir. Yem üretimi esnasında uygun mekanizasyon kullanılarak yem yoğunluğunun tatlı su...
Article
Full-text available
Current status of organic fish production. Fish that are produced under natural conditions in accordance with the principles of organic agriculture without any use of preservative additives and without any genetic modifications, that are fed feed produced from natural raw materials, that are certified by a qualified institution are defined as 'orga...
Conference Paper
Full-text available
https://www.was.org/easonline/MeetingAbstracts/ShowAbstract.aspx?i=4393 Aquaculture Europe 2015 Rotterdam, Netherlands THE EFFECTS OF AMINO ACID SUPPLEMENTATION WITH DIFFERENT DIETARY PROTEIN LEVELS ON THE GROWTH PERFORMANCE OF MEAGRE, Argyrosomus regius D. Güroy1, O. Karadal1, S. Mantoglu1, B. Güroy1, K. Çelebi1, O. Şimşek1, O.T. Eroldogan2,...
Article
A nutrition trial with meagre, Argyrosomus regius was assessed to determine the effect of dietary replacement of fish oil (FO) by soybean oil (SO) on the growth, feed utilization, body composition, fatty acid composition and basic haematological parameters. Six isonitrogenous (47% crude protein) and isoenergetic (gross energy 22 kJ/g) experimental...
Article
A feeding trial was performed to determine the effect of a commercial source of Yucca schidigera and Quillaja saponaria extracts (Nutrafito Plus®), in practical diets, on striped catfish Pangasianodon hypophthalmus growth, feed utilization, body composition, total ammonia-nitrogen (TAN) excretion and haematological parameters. Four experimental die...
Article
Full-text available
Effects of different herbal extracts on the growth and immune defense of fish were researched in the last decade. The aim of this study was to determine the dietary effects of thyme (Thymus vulgaris), rosemary (Rosmarinus officinalis) and fenugreek (Trigonella foenum graecum) as a feed additive on haematology, innate immune response, and disease re...
Article
Full-text available
Effects of different herbal extracts on the growth and immune defense of fish were researched in the last decade. The aim of this study was to determine the dietary effects of thyme (Thymus vulgaris), rosemary (Rosmarinus officinalis) and fenugreek (Trigonella foenum graecum) as a feed additive on haematology, innate immune response, and disease re...
Article
Full-text available
This study aimed the evaluation of corn gluten meal (CGM) as a fish meal (FM) replacer in diets of two banded seabream, Diplodus vulgaris, juveniles. Five isonitrogenous and isocaloric diets were formulated containing %0, %15, %30, %45 and %60 CGM, and two banded seabream juveniles with an average weight of 5.92±0.004 g. were fed. Experimental f...
Article
Full-text available
Lipids and their constituent fatty acids play essential and dynamic roles in the maintenance of optimum growth, feed efficiency and health of fish species. Lipids are primarily included in formulated diets to maximize their protein sparing effects. However, increasing the concentration of dietary fatty acids (EPA and DHA) in the fish diet can negat...
Article
Full-text available
The objective of this study is to investigate the effects of dietary protein and lipid levels on the growth performance and bioeconomic benefits of two-banded seabream (Diplodus vulgaris) juveniles, a candidate species for aquaculture sector. Eight experimental diets were formulated with four protein (50, 45, 40 and 35 %) levels for each of the two...
Article
A nutrition trial with striped catfish (Pangasianodon hypophthalmus) juveniles was undertaken to evaluate the effect of replacing dietary fishmeal (FM) protein with corn gluten meal (CGM). A diet with FM as the main protein source was used as the control diet (FM). Five experimental diets (approximately 320g kg1 crude protein) were formulated to pr...
Article
As no information is available regarding the efficacy of using rice protein concentrate (RPC) to replace fishmeal (FM) in diets for European sea bass (Dicentrarchus labrax), a trial was conducted to determine the optimum inclusion for European sea bass juveniles. Diets were formulated to replace 25%, 50% and 75% of fishmeal with RPC. Additional hig...
Article
Full-text available
A nutrition trial was carried out to investigate the effects of inclusion of Ulva meal at different dietary lipid levels on growth performance, feed utilization and body composition of juvenile gilthead seabream, Sparus aurata. In this study, gilthead seabream with an average weight of 8.5 +/- 0.01 g were fed experimental diets for 7 weeks. The Eig...
Article
Full-text available
The utilization of corn gluten meal (CGM) was evaluated as a partial fish meal (FM) substitute in practical diets for gilthead sea bream juveniles. Four test diets (isonitrogenous and isocaloric, 52% protein and 10% lipid, 19 kJ/g diet) containing increasing levels of CGM were formulated to replace anchovy meal at levels of 0%, 10%, 20%, and 30%. T...
Article
A feeding trial was conducted to investigate the effects of the dietary incorporation of autoclaved and raw (non-autoclaved) Ulva meal on juvenile rainbow trout (Oncorhynchus mykiss) growth, nutrient utilization, body composition, diet digestibility and fatty acid composition. An algae-free control diet and four experimental diets with either 5 or...
Article
Full-text available
This study evaluated the effects of the dietary organically-certified yeast, NuPro™, used as a replacement for fishmeal, on growth performance, nutrient utilization, and fatty acid composition in juvenile rainbow trout, Oncorhynchus mykiss. Two reference diets (conventional and organic) and three experimental diets (including 10%, 20%, or 30% NuPro...
Article
Full-text available
A 12-week growth trial was conducted to determine the effects of dietary protein on the growth of the yellow tail cichlid, Pseudotropheus acei, and on water quality in closed recirculating systems. Six test diets were formulated to contain protein levels ranging 25-50% by substituting corn oil and α-starch for fishmeal. Diets were assigned to tripl...
Article
A feeding trial was conducted to investigate the effects of the replacement of dietary fish meal and fish oil with oilseed meals (soybean or canola) and canola oil on growth, nutrient utilization, body composition, diet digestibility and hematological parameters of rainbow trout Oncorhynchus mykiss. Seven diets were used; the control diet (designat...
Article
Summary A feeding trial was carried out to determine the effects of dietary protein and lipid levels on the growth performance and feed utilization of wild-caught striped sea bream (Lithognathus mormyrus). The experimental fish were collected from a local lagoon (Çardak Lagoon, Çanakkale, Turkey), transferred to the Marine Net Cage Unit and fed by...
Article
Full-text available
The interactions between the endogenous gut microbiota and the fish host are integral in mediating the development, maintenance and effective functionality of the intestinal mucosa and gut associated lymphoid tissues (GALTs). These microbial populations also provide a level of protection against pathogenic visitors to the gastrointestinal (GI) trac...
Article
Full-text available
A study was conducted to determine the effect of dietary algal supplementation on weight loss and proximate composition in rainbow trout, Oncorhynchus mykiss, during starvation. An algae-free control diet (C) and four experimental diets, including varying levels of raw Ulva meal (5% = U5; 10% = U10) and Spirulina meal (5% = S5; 10% = S10) were form...
Article
Full-text available
Blood chemistry parameters can provide essential information on the physiological status of the animal and therefore allow accurate evaluations of the general health status. Canonical correlation analysis is a fundamental statistical tool The goal of canonical correlation analysis is to evaluate the relative contribution of each variahle to the der...
Article
Full-text available
An experiment was designed to determine the optimum dietary protein level of a freshwater ornamental fish, Blue streak hap (Labidochromis caeruleus). Four isocaloric fish meal based diets ranging from 30% to 45% in protein were fed to triplicate groups of Blue streak hap for 8 weeks. Fish (initial weight, 0.85 g) were reared in twelve 50 L aquarium...
Article
A 9 week study was conducted to assess the effect of incorporating dietary Chlorogloeopsis on the growth performance, feed utilisation, body composition, haematology and gut microbiota of red tilapia (Oreochromis niloticus). Chlorogloeopsis cells were supplemented to the diet at 0.25%, 0.50% and 1.00%. Compared to the control group, no significant...
Article
Full-text available
A 77-day feeding trial was designed in order to assess the effect of partial or total replacement of soybean meal by hazelnut meal (HNM) on feed intake, growth performance, nutrient utilization and body composition of rainbow trout (initial mean body weight: 80.0±3.5 g) in seawater conditions. A control and three experimental diets were formulated...
Article
The purpose of the present study was to evaluate the environmental effects of four trout farms on the water quality of the Esen Stream, South-Western Turkey, between February and December 2006. Water quality was monitored by bi-monthly sampling inlet and outlet water of each farm, at the same hour of the sampling day. The dissolved oxygen (DO) conc...
Article
Full-text available
The objective of this study was to assess the environmental impact of one of the biggest flow-through rainbow trout farms located in South-Western Turkey between February and December 2006. The feeding water is obtained from the Yuvarlakçay Stream (Muðla, Turkey) at a mean flow rate of 2.86 Litre s-1 per ton of the annual fish production (700 t yea...
Article
Full-text available
A feeding trial was conducted to determine the dietary protein requirement of juvenile electric blue cichlids (Sciaenochromis fryeri). Groups of fish (0.50±0.01 g) were fed one of four isocaloric diets containing protein levels ranging 35-50% for 12 weeks. According to the broken-line model, the dietary protein requirement was estimated as 38.8%. T...
Article
Full-text available
A nutrition trial was conducted to investigate the effects of dietary lipid levels and supplemental Ulva meal on growth performance, feed efficiency, nutrient utilization, and body composition of juvenile Nile tilapia, Oreochromisniloticus. Four isonitrogenous (CP 40%) diets containing 0% and 5% Ulva meal were formulated to contain 10% (low-lipid;...
Article
In a 12-week feeding trial, the effect of 2 algae meals ( Ulva rigida or Cystoseira barbata) on feed intake, growth, and nutrient utilization of juvenile Nile tilapia, Oreochromis niloticus, was investigated. This was the first attempt to utilize Cystoseira barbata as a feed supplement for Nile tilapia. The fish were fed to apparent satiation with...
Article
In an 83-day-nutrition trial, effects of feed production technique and feeding frequency on feed intake, growth and nutrient utilization were determined in European sea bass (Dicentrarchus labrax). Three thousand six hundred fish (170 ± 2.6 g) were randomly allocated to experimental sea cages (approx. 5800 l) according to a 2 x 2 experimental plan...
Article
A total of 86 different fish species were recorded in Istanbul Fish Market between 1998 and 2001. During these years, the highest productions were recorded for european anchovy (Engraulis encrasicholus Linnaeus, 1758), horse mackerel (Trachurus trachurus Linnaeus, 1758), bonito (Sarda sarda Bloch, 1793), bluefish (Pomatomus saltatrix Linnaeus, 1766...

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