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Water Quality Monitoring in European and Turkish
Rivers Using Diatoms
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By
Cuneyt Nadir Solak, Eva Acs
© 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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38 views |
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329-337 Page(s) |
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Abstract
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Water is one of the most essential factors for civilization, and also among the most important items in the new world
order due to its unrenewable feature. In this regard, developed countries have continually been monitoring and classifying
their water. For this reason, a number of EU countries have developed a national water quality system, considering
characteristic structure of their own rivers and have used this type of indices for revealing the current stituation of their water
quality level. While water quality monitoring was first determined according to physical and chemical parameters, biological
factors such as algae, especially diatoms, benthic macroinvertebrates and fish have recently been used for this purpose... |
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Keywords
Biomonitoring, diatom indices, rivers, Turkey, WFD.
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Reproductive Biology of Aphanius Mento (Heckel in:
Russegger, 1843) Osteichthyes: Cyprinodontidae) in
Kirkgoz Spring (Antalya-Turkey)
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By
Salim Serkan Guclu, Fahrettin Kucuk © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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323-327 Page(s) |
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Abstract
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The reproduction of Aphanius mento is described from the Kirkgoz Spring (Turkey) (37º06' N; 30°35' E) between
January 2002 and December 2002. In this study, the sex ratio, age, the relationship between fecundity and fish length, weight
and gonad weight, the gonadosomatic index, egg diameter and the first age of maturation were observed. Age range was
determined as 0-VII years for 654 individuals. The overall male to female ratio was 1.10 : 1.00. Spawning period was between
May and July. The first maturation was found to be at age I... |
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Keywords
Killifish, Anatolia, GSI, fecundity.
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Annual Variation in the Diversity, Species
Richness and Composition of the Phytoplankton
Assemblages in the Izmir Bay (Eastern Aegean)
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By
Fatma Colak Sabanci, Tufan Koray © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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303-314 Page(s) |
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Abstract
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In this study, qualitative and quantitative characteristics of phytoplankton community structure and environmental
factors which have influences on its distribution and the changes in Izmir Bay (Aegean Sea) were investigated. The water
samples were collected seasonally between January 1998 and December 2001 from 3 sampling sites (from surface, -5 m, -10
m and -15 m). During the study period, a total of 115 taxa from three algal classes, Cyanophyceae, Dinophyceae and
Bacillariophyceae were determined. Spatio-temporal phytoplankton community composition in the bay was often dominated
by dinoflagellates but shift to diatom dominance was observed in some periods, particularly in spring and winter... |
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Keywords
Algal blooms, species diversity, students t-test, discriminant, Aegean Sea.
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Effects of Feeding Interval on Growth, Survival
and Body Composition of Narrow-Clawed Crayfish,
Astacus Leptodactylus Eschscholtz, 1823
Juveniles
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By
Yavuz Mazlum, Ozlem Guner, Sinem Sirin © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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283-289 Page(s) |
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Abstract
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Newly hatched third instars of Astacus leptodactylus (mean weight 44.5±3.4 mg and mean total length 10.8±0.4 mm)
were randomly stocked in 0.2 m2 aquariums at rate of 100 crayfish/m2 fed with trout feed at a quantity 5% of crayfish body
weight for 90 day. The amount of diet was adjusted according to the total crayfish biomass calculated for each sampling
period (30-days interval). Four feeding intervals were tested: everyday (D), every 2nd (D2), every 3rd (D3), and every 4th day
(D4). At the end of feeding period, the feeding interval had significant impact on crayfish survival, growth rate, and yield... |
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Keywords
Astacus leptodactylus, feeding interval, growth, survival, body composition.
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Nutrient Utilization and Food Conversion of
Rainbow Trout, Onchorhynchus Mykiss, Subjected to
Mixed Feeding Schedules
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By
Shabir Ahmed Bhat, Salman Rauoof Chalkoo, Qaiser Jahan Shammi © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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273-281 Page(s) |
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Abstract
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Fish were offered either restricted feeding (5% of body weight or 1% body weight as maintenance requirement) or
appetite feeding subdivided into three equal feeds. The best (P<0.05) growth response in terms of final body weight, percent
weight gain and specific growth rate (SGR) was observed for feeding schedule I (control), for fish fed to appetite throughout.
Feeding schedule II showed significantly the highest (P<0.05) growth response in terms of final body weight, percent weight
gain and specific growth rate (SGR) in comparison with other feeding schedules... |
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Keywords
FCR, SGR, growth rate, Onchorhynchus mykiss, feed restriction, nutrient utilization.
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Evaluation of Meat Yield, Proximate Composition
and Fatty Acid Profile of Cultured Brook Trout
(Salvelinus Fontinalis Mitchill, 1814) and Black
Sea Trout (Salmo Trutta Labrax Pallas, 1811) in
Comparison with their Hybrid
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By
Sebnem Atasaral Sahin, Nadir Bascinar, Mehmet Kocabas, Bekir Tufan, Sevim Kose, Ibrahim Okumus © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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261-271 Page(s) |
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Abstract
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Meat yield, biochemical composition, and fatty acid profile of farmed brook trout (Salvelinus fontinalis), Black Sea
trout (Salmo trutta labrax) and their hybrids were compared. Hybrids contained significantly higher carcass and meat yield
values than brook and Black Sea trout. Although the weight percent head and bone (brook trout as 13.14, 1.66 %, Black Sea
trout as 13.52, 1.22 % and their hybrids as 13.92, 1.44 %) of the species were similar, fin, carcass, gonad, liver, internal
organs and meat yield of the species were significantly different from each other (P < 0... |
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Keywords
Black Sea trout, brook trout, hybrid, fatty acid profile, meat yield.
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Comparative Studies on Toxicokinetics and Residues
of Dimethyl Phthalate (DMP) in Tilapia
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By
Jian Ge, Mingkui Li, Fang Lin, Jin Zhao, Xianjun Dai © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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253-259 Page(s) |
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Abstract
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The study was conducted to evaluate the toxicokinetic disposition and residue of Dimethyl phthalate (DMP) in tilapia at
different water temperatures (180C and 280C) by RP-HPLC method. After oral administration of DMP with a single does of
20mg/kg body weight, the tilapia's plasma, muscle, brain, skin and myocardium were sampled separately at different time to
determine the concentration of DMP. Then the data were analyzed using 3p97 Pharmacokinetics software written by the
Chinese Society of Mathematical Pharmacology, which indicated that the absorption, distribution and elimination half-life at
280C were 0... |
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Keywords
Tilapia (Oreochromis niloticus×O.aureus, Dimethyl phthalate (DMP), RP-HPLC, toxicokinetics, residue.
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Changes in Biochemical, Sensory and
Microbiological Quality Indices of Common Sole
(Solea Solea) from the Mediterranean Sea, during
Ice Storage
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By
Yesim Ozogul, Esmeray Kuley Boga, Bahar Tokur, Fatih Ozogul © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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243-251 Page(s) |
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Abstract
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The quality of wild common sole (Solea solea) stored in ice was investigated by chemical (K value, biogenic amines,
protein degradation (SDS and SDS-PAGE), pH, peroxide value (PV), free fatty acids (FFA), total volatile basic nitrogen
(TVB-N), tiobarbituric acid (TBA) analyses), sensory (raw and cooked fish) and microbiological methods. The quality of
common sole decreased on day 16 (fair quality- B) and they were no longer acceptable on day 20 (unacceptable quality-C).
When common sole were considered as fair quality (B) by assessors on ~16-18 days, the average K value was ≥ 80%... |
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Keywords
Common sole, freshness indicators, shelf life, K value, biogenic amines, protein degradation.
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Determination of some Quality Criteria of Cold
Storaged Marinated Anchovy under Vacuum and
Modified Atmosphere Conditions
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By
Ugur Gunsen, Ali Ozcan, Ali Ayd © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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233-242 Page(s) |
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Abstract
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This study was performed to determine the effects of vacuum packaging (VP) and modified-atmosphere packaging
(MAP) by different gas mixtures (70% CO2 / 30% N2 = M1, 50% CO2 / 50% N2 = M2) on the potential quality index, shelflife
and histamine formation in marinated anchovies during the storage at 2±2°C. Results showed that thiobarbituric acid
(TBA) values marinated anchovies under M1 and M2 exceeded the limit given by Turkish Food Codex and the sensoric
qualities were reduced from "first quality" to "not consumed" on month 11 of storage at 2±2°C as compared to vacuum
packaging (7th month)... |
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Keywords
Marination, packaging, histamine, shelf-life.
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Effectiveness of Bait and Unbait in Trapping of
Astacid Crayfish
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By
Yildiz Bolat, Yavuz Mazlum, Ali Gunlu, Sengul Bilgin, Levent © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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227-232 Page(s) |
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Abstract
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The effectiveness of baited and non-baited traps was evaluated from June and December 2003 in Egirdir Lake. A total
of 400 fyke-nets was set randomly along the shoreline at intervals of approximately 3 m, and hauled over 7 months. The mean
catch per unit effort (CPUE) was found vary for sampling periods and treatments. In both treatments, average of CPUE were
increased with increasing sampling periods. In addition, mean CPUE was found significantly different in both treatments
(P < 0.05). The overall average CPUE in non-baited traps were 2 times greater than baited traps... |
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Keywords
Astacus leptodactylus, catch composition, CPUE, fishing potential, E
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A Study on the Age, Growth and Reproduction of
Aspius vorax (Heckel, 1843) (Cyprinidae) in
Ataturk Dam Lake (Euphrates River), Turkey
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By
S. Ahmet Oymak, Erhan Unlu, Arif Parmaks © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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217-225 Page(s) |
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Abstract
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In this study, the age, growth and reproduction characteristics of Aspius vorax, which were caught from Ataturk Dam
Lake (Euphrates River) between September 2007 and August 2008 were determined. The age composition of the specimens
ranged between II and IX age groups. The observed sex ratio was 1:1.75 (females/males). The fork length and weight of the
individuals that were examined ranged from 184 to 863 mm and from 54 g to 4,317 g, respectively. The relationship of fork
length (LF) and scale radius (S) was estimated as: LF=-95... |
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Keywords
Aspius vorax, growth parameters, condition factor, fecundity, gonadosomatik index.
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Occurrence of Non-Native Fishes in a Small
Man-Made Lake (Lake Ula, Mugla): Past, Present,
Future Perspectives
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By
Bahad © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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209-215 Page(s) |
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Abstract
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Changes in fish fauna, fish conditions and some physico-chemical features of water of Lake Ula which was established
for irrigation purposes and subjected to introduction of non-native fishes were investigated. Six different fish species were
found, five of them belong to Cyprinidae family; common carp Cyprinus carpio L., 1758, gibel carp Carrassius gibelio
(Bloch, 1782), goldfish Carassius auratus (L., 1758), chub Squalius cephalus (L., 1758) and gizani Ladigesocypris ghigii
(Gianferrari, 1927). The other species found was eastern mosquitofish Gambusia holbrooki Girard, 1859 from Poeciliidae
family... |
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Keywords
Reservoir, alien fishes, fish introduction, cyprinids.
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Evaluation of Nutritive Value of Water Hyacinth
(Eichhornia crassipes) Leaf Meal in Compound Diets
for Rohu, Labeo rohita (Hamilton, 1822)
Fingerlings after Fermentation with Two Bacterial
Strains Isolated from Fish Gut
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By
Sangbrita Saha, Arun Kumar Ray © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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199-207 Page(s) |
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Abstract
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Nine isonitrogenous (30% crude protein approximately) and isocaloric (18.23 kJ g-1) experimental diets (D1-D9) were
formulated either with raw or treated (fermented with fish intestinal bacteria) Eichhornia crassipes leaf meal at 20%, 30% and 40%
levels replacing other ingredients partially from a fish meal based reference diet (RD). Two specific strains of fish intestinal bacteria,
Bacillus subtilis CY5 (isolated from Cyprinus carpio) and B. megaterium CI3 (isolated from Ctenopharyngodon idella) having extracellular
cellulolytic and amylolytic activities, were used for fermentation of Eichhornia leaf meal for 15 days at 37°C... |
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Keywords
Eichhornia crassipes, Fish gut bacteria, fermentation, diets, growth, Labeo rohita fingerlings.
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Seasonal Variation in the Trawl Codend Selectivity
of Red Mullet (Mullus Barbatus)
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By
Huseyin Ozbilgin, Zafer Tosunoglu, Adnan Tokac, Gulnur Metin © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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191-198 Page(s) |
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Abstract
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Seasonal changes in the selectivity of 40 mm PE codend were investigated in the Eastern Aegean Sea. Selectivity of the
same codend was tested for red mullet (Mullus barbatus), by using the same vessel, fishing ground, towing speed and
duration. Four sets of data were collected in spring (4-18 April 2002), summer (10-25 July 2002), autumn (26 September-2
October 2002) and winter (22-23 January 2003). Data were obtained by using covered codend technique, and analysed by
using logistic equation with the maximum likelihood method... |
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Keywords
Trawl selectivity, covered codend, Aegean Sea.
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Evaluation of Cooked and Mechanically Defatted
Sesame (Sesamum Indicum) Seed Meal as a Replacer
for Soybean Meal in the Diet of African Catfish
(Clarias Gariepinus)
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By
W.A. Jimoh, H.T. Aroyehun © 2011. Fisheries Research Institute
Turkish Journal of Fisheries and Aquatic Sciences, Volume 11, Issue 2
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185-190 Page(s) |
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Abstract
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A 56-day feeding trial was conducted to assess the replacement value of cooked and mechanically defatted sesame seed
meal as dietary replacement of soybean meal in diets of Clarias gariepinus. All diets were prepared to be isonitrogenous,
(40% crude protein), isolipidic (12% lipid) and isoenergetic (18 Mj/g). Cooked and mechanically defatted sesame seed meals
were used to replace soybean meal at a rate of 0, 25, 50, 75, 100% respectively. The performance of the fish fed sesame seed
meal-based test diets was compared to fish fed a soybean meal-based control diets containing 40% crude protein... |
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Keywords
Sesame, African catfish, soybean meal, mechanically defatted.
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