Time filter

Source Type

Gokcek K.,Mustafa Kemal University | Ogretmen F.,Muǧla University | Kanyilmaz M.,Production and Training Institute
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2017

The efficacy of clove oil, 2-phenoxyethanol and benzocaine was tested on captive-bred European catfish (wels), Silurus glanis L., 1758 in this study. According to effectiveness criteria, the most optimal implementation results were obtained from 100 μl L-1 (induction 69.00±6.48 s and recovery 253.86±14.78 s) clove oil, 1000 μl L-1 (induction 88.71±8.50 s and recovery 201.43±12.19 s) PE, and 100 μl L-1 (induction 103.00±6.90 s and recovery 215.71±19.99 s) benzocaine. The concentration of anesthetics agent used directly affected the onset of each physiological respond (p<0.05). The relationship between doses and induction times was inverse exponential, in spite of that an exponential relationship was confirmed between doses and recovery times for all anesthetics. In conclusion, all these three anesthetics can be effectively used for wels. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey.

Balik I.,Ordu University | Emre Y.,Production and Training Institute
Journal of Applied Ichthyology | Year: 2016

The main objective of this study was to investigate the population structure, length-weight relationship (LWR) and growth of white seabream, Diplodus sargus sargus (L., 1758) in Beymelek Lagoon, Turkey. Samples were collected by gill- and trammel nets of various mesh sizes, February 2006 to January 2007. A total of 355 specimens (51 males; 34 females; 270 unidentified) were collected. Male to female ratio was 1.50 : 1. Ages ranged from 0 to 3 years; about 70% were juveniles. Most fish were between 13 and 16 cm in total length and below 90 g in weight. The LWR of all individuals was W = 0.0140 × L3.1028. The von Bertalanffy growth equation was calculated as Lt = 39.9 × [1 - exp(-0.268 × (t + 1.753)] and the growth performance index (Φ′) was 6.056. © 2016 Blackwell Verlag GmbH.

Acanthocephalan Pomphorhynchus laevis specimens are reported in Alburnus baliki and Capoeta antalyensis caught between May and July of 2009 in streams discharging into Antalya Bay. Th e total prevalence rate for P. laevis was 78.5% and 60% in A. baliki and C. antalyensis, respectively. A total of 28 A. baliki were caught, and 74 P. laevis were recorded in 22 of the 28 fish examined. As for the occurrence of P. laevis in C. antalyensis, a total of 15 fish were caught, and a total of 25 individuals were found in 9 of the 15 fish examined. Th is finding constitutes the first record of this helminth parasite in either fish species, and the host fishes represent 2 new host records for P. laevis. © TÜBİTAK.

A total of 65 individuals from 3 different fish species, Capoeta antalyensis (n: 15), Aphanius mento (n: 29), and Pseudophoxinus battalgil (n: 21), were examined for helminth parasites (Nemathelminthes) between May and July of 2009. A total of 123 parasites of 3 species were found in these fish, consisting of 3 nematodes: Rhabdochona denudata, Eustrongylides excisus larvae, and Contracaecum sp. larvae. Among these species, R. denudata was recorded in the intestine of C. antalyensis, with a total of 92 parasites found in 13 of the 15 C. antalyensis examined. The overall prevalence of this species was 86.6%. Two further species of nematodes, Contracaecum sp. larvae and E. excisus larvae, were found in the abdominal cavities of P. battalgil and A. mento, respectively. Contracaecum sp. larvae were found in 10 of 21 fish examined and a total of 29 specimens were recorded, making the overall prevalence of this species 47.6%. Only 2 E. excisus larvae were found in 2 of the 29 fish examined. This study provides the first ichthyoparasitological data for these host fish species in Turkey, and the occurrence of R. denudata in C. antalyensis and Contracaecum sp. larvae in P. battalgil are considered to be new host records for these fish species. © TÜBİTAK.

Apaydin Yagci M.,Production and Training Institute
Iranian Journal of Fisheries Sciences | Year: 2013

This study was carried out to determine seasonal variation and zooplankton community structure in Karataş Lake, Southern Turkey. Zooplankton samples were collected seasonally between 2002 and 2003 in two stations using a zooplankton net of 55-μ m mesh size. A total of 42 taxa were identified, including 19 taxa (45.2 %) Rotifera, 16 taxa (38.1 %) Cladocera, and 7 taxa (16.7 %). Copepoda. Among them, Keratella quadrata, Asplanchna priodonta from Rotifera, Daphnia longispina, Ceriodaphnia quadrangula, Chydorus sphaericus, Coranatella rectangula from Cladocera, and Eudiaptomus drieschi, Eucyclops speratus from Copepoda were dominant species. Spring and autumn seasons were found to be the most similar by using Sorenson index value.

Kanylmaz M.,Production and Training Institute
Pakistan Journal of Zoology | Year: 2016

The present study aimed to determine reproductive performance of a newly described Salmo species, Salmo kottelati (Alakir trout), under culture conditions. With this purpose, hatching performance of 10 selected females was evaluated by fertilizing with pooled sperm from 10 males. For determination of sperm characteristics, 10 males were randomly selected, stripped and their milt samples were individually taken. Average fertilization rate, eyed-egg rate and hatching rate were found as 88.3%, 81.9% and 65.2% respectively. Sperm characteristics such as volume per fish (mL), pH, concentration (per mL), motility (%) and duration of motility (second) were 2.60, 7.6, 21.2×109, 78.2 and 56.6 respectively. The study results and scientific observations regarding reproductive performance suggest that S. kottelati can be considered a candidate species for aquaculture.

Kocer M.A.T.,Production and Training Institute | Kanyllmaz M.,Production and Training Institute | Yllayaz A.,Production and Training Institute | Sevgili H.,Production and Training Institute
Aquaculture Environment Interactions | Year: 2013

This study aimed to characterize the effluents of 3 flow-through farms with annual production rates of 250, 750 and 2500 t yr-1 at a site with a total annual production of 4400 t yr-1. We determined the nutrient loads from rainbow trout Oncorhynchus mykiss farms using nutritional and hydro logical mass-balance models and estimated the fluxes into a regulated stream and into the Mediterranean Sea between March 2008 and February 2009. When compared with the influent, farming activity significantly decreased dissolved oxygen (p < 0.001) and increased biochemical oxygen demand, suspended solids, and nitrogen and phosphorus fractions (p < 0.05) in the effluents. The load predictions of 44.3 kg N and 8.4 kg P t-1 of fish produced by the nutritional method were close to the measured values of 43.9 kg N and 8.8 kg P t-1 of fish produced. The load prediction for suspended solids was the same as the measured value of 278 kg t-1 of fish produced. The predictions were well correlated with measurements for suspended solids and for total nitrogen and phosphorus. The estimated annual mass fluxes of nitrogen and phosphorus from trout farms at the site into the eastern Mediterranean Sea were 125 to 127 and 24 to 25 t yr-1, respectively. The nutritional mass-balance model may be the method of choice as a decision tool for the envi ronmental impact assessment of land-based aquaculture because of its simplicity and easy application©The authors 2013. © The authors 2013.

Sevgili H.,Production and Training Institute | Kurtoglu A.,Mediterranean Fisheries Research Production and Training Institute | Oikawa M.,Mediterranean Fisheries Research Production and Training Institute | Mefut A.,Production and Training Institute | Suyek R.,Mediterranean Fisheries Research Production and Training Institute
Journal of the World Aquaculture Society | Year: 2012

This study was conducted to determine the effects of the use of farmed salmon oil (FSO) as a substitute for anchovy oil (AO) on growth and nutrient utilization performance, and proximate and fatty acid compositions of turbot, Psetta maxima. Two fish oil sources, AO and FSO, were incorporated into the diet at a level of 6.77% and fed to turbot with an initial average weight of 266.25 ± 0.53 g in brackish water for 9 wks. Each diet was tested in four replicates and fed to apparent satiation twice a day. At the end of the experiment, data of growth and nutrient utilization performances (feed conversion ratio, nitrogen, lipid and energy intakes, gains, and retentions), and organo-somatic indices were similar between the dietary oil sources. Likewise, there were no significant differences in final whole body proximate compositions between two treatments. However, AO and FSO diets significantly affected whole body fatty acids and fatty acids classes. Briefly, FSO fish was characterized with higher n-6 poly unsaturated fatty acids (PUFA) mainly 18:2n-6 whereas AO fish with higher n-3 PUFA and highly unsaturated fatty acids mainly 22:6n-3. The whole body fatty acid profile reflected that of the diets. It is concluded that incorporation of FSO instead of AO in turbot diets supports similar growth and nutrient utilization performances but change whole body fatty acid profile. © Copyright by the World Aquaculture Society 2012.

Sevgili H.,Production and Training Institute | Hossu B.,Ege University | Emre Y.,Production and Training Institute | Emre Y.,Mediterranean Fisheries Research Production and Training Institute | Kanyilmaz M.,Production and Training Institute
Aquaculture | Year: 2012

This study was conducted to determine the effects of various levels of dietary protein restriction for 3weeks (phase 1) on compensatory growth, nutrient utilization, body compositions and organ indices of rainbow trout (Oncorhynchus mykiss) during a nine-week realimentation phase (phase 2). Five experimental treatments consisted of four protein restricted diets including 15, 22.5, 30 and 37.5% protein (RP15, RP22.5, RP30 and RP37.5 respectively) and the control diet 45% (C45). All diets were prepared to be isoenergetic at levels of 22.5MJkg -1 gross or 16.3MJkg -1 digestible energy. Each of five treatment groups was tried in triplicate groups of 75 fish with an average initial weight of 62.06±0.38g. Protein restriction in phase 1 linearly decreased specific growth rates of weight and length (SGR W and SGR L), body weight and length as well as feed utilization. The restriction induced a linearly increasing trend in protein retention efficiency, feed intake, organ indices such as viscera, pyloric caecum and hepato-somatic, whole body lipid and lipid/lean body mass whereas it induced a decrease in whole body moisture and protein at the end of phase 1. Protein restriction, except RP37, caused a significant increase in SGR W during phase 2 compared with C45, being most pronounced in the first 3weeks. Repeated measures ANOVA revealed a convergence in trajectories of ln body weight and length at the end of the experiment, suggesting that a complete catch up occurred in body mass and structure. There was also replenishment in distorted organ indices and body compositions, except protein which was still less in R15 than C45. More efficient utilization of feed and dietary protein by previously protein restricted fish during phase 2 appears to be the reason of the compensatory growth. At the end of the experiment, protein restriction was found to be effective in reduction of N loss. © 2012 Elsevier B.V..

Smales L.R.,South Australian Museum | Aydogdu A.,Uludag University | Emre Y.,Production and Training Institute
Comparative Parasitology | Year: 2015

Seven species of endemic freshwater fish, Aphanius anatoliae, Aphanius villwocki (Cyprinodontidae), Capoeta angorae, Capoeta erhani, Capoeta mauricii, Chondrostoma fahirae, and Pseudophoxinus fahrettini (Cyprinidae) from Turkey were examined for acanthocephalans. Acanthocephalus sp., Neoechinorhynchus zabensis, Pomphorhynchus spindletruncatus, and Paralongicollum nurtenae n. sp. were found. The new species can be distinguished from its congeners by a suite of characters including the shape of the proboscis, which has an armature of 16-22 rows of 10-13 hooks, the posterior most circle of hooks alternating. All are new host and locality records. The geographic distributions of N. zabensis and P. spindletruncatus in Turkey may be due in part to changes in glacial river system connections that have occurred since the Pleistocene. © 2015 The Helminthological Society of Washington.

Loading Production and Training Institute collaborators
Loading Production and Training Institute collaborators