2024-03-28T15:38:04+03:30 http://jifro.ir/browse.php?mag_id=8&slc_lang=en&sid=1
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 The effect of artificial reefs on fish assemblage versus natural sites in the Bandar Lengeh-Iran H. Azhdari h_azhdari@yahoo.com Mohd Ibrahim Aziz Arshad Shamarina Shohaimi Z. Ajdari Zelina Zaiton Ibrahim   Artificial reefs are used to compensate the destruction of marine ecosystems. In the present study, the effects of artificial reefs were compared to natural sites. For this purpose, five treatments including four different forms (Reef ball (R), Laneh Mahi (L), used materials (U) and R+L+U) of artificial reefs and one control were established. The reefs were deployed at Bandar Lengeh, the Persian Gulf. At each site, the fish sampling were carried out every three months for one year. According to data, significant differences (p<0.05) were found between the artificial reefs and the control sites in terms of Catch Per Unit Effort (CPUE). Among the reef treatments, the best enhancement of CPUE was for the mixed form of reefs compared to other forms and control. The present study indicates that the artificial reefs deployed have enhanced the fish community. Artificial Reef Reef attraction Comparative fish attraction Reef fishery Fish assemblage Persian Gulf 2012 1 01 1 12 http://jifro.ir/article-1-438-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Age, growth and length at first maturity of Otolithes ruber in the Northwestern part of the Persian Gulf, based on age estimation using otolith Gh. Eskandari g_eskandary@yahoo.com A. Savari P. Kochanian A. Taghavi Motlagh   Estimates of age, growth parameters, length-weight relationship and length and age at first maturity of the otolithes ruber are required for fishery management. We used counting annuli on the section of sagittal otoliths to age O.ruber from the Northwest Persian Gulf in south of Iran. Estimated ages ranged from 0 to 6 years, and maximum frequency of fishes was observed in age-group 1. The values of growth parameters L∞, k and to were calculated by von Bertalanffy model and the results were 67.57 (cm), 0.27 (year-1) and -0.43 respectively. Parameters b and an in length-weight relationship were calculated 3.19 and 0.005 respectively. Length and age at first maturity were estimated 28 cm and 1.55 year. Otolithes ruber Age composition Growth Length at first maturity Persian Gulf 2012 1 01 13 27 http://jifro.ir/article-1-439-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Effects of different starter diets on growth indices of Caspian Kutum, Rutilus frisii kutum larvae B. Falahatkar falahatkar@guilan.ac.ir H. Mohammadi H. Noveirian   Six different diets including two rainbow trout starters, Gammarus dry powder, shrimp dry powder, egg yolk dry powder and newly hatched Artemia were used in feeding of Caspian Kutum larvae. During a 4-week trial, larvae with a mean weight of 17.5 ± 4.7 mg were fed with three replicates and growth parameters were measured at the end of the experiment. Thirty fish in each experimental unit with 3 L volume were fed 6 times daily according to their satiation. Results showed that there were significant differences in the final weight, final length, body weight increase, voluntary feed intake and specific growth rate for weight and length among the treatments (P0.05). The best performance was observed in fish fed Artemia nauplii. The survival rate was significantly different among the treatment (P<0.05) which the highest (75.6 ± 3.8%) and lowest (22.2 ± 11.7%) were observed in fish fed Artemia nauplii and Coppens, respectively. According to obtained results, it appears that except Artemia, the most suitable and inexpensive diet is egg yolk powder, which can results in high growth performance and survival rates. The results of this study suggested that using dry non-live diets with good composition could be replaced with Artemia that had suitable growth and survival rate in Caspian Kutum during larval 0 food practical diet growth survival larvae Caspian Kutum 2012 1 01 28 36 http://jifro.ir/article-1-440-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Growth and mortality of brown trout, Salmo trutta fario in Lar dam, Iran H. Fazli hn_fazli@yahoo.com H. Azari M. Moghim D. Kor E. Nabavi Jelodar H. Taleshian     The length-weight relationship, age, growth parameters, sex ratio, mortality and exploitation rate of Salmo trutta fario were determined in Lar dam. The sex ratio (male: female) was 1:1.84 which differed significantly from the expected 1:1. The length-weight regression was (females) and (males) indicating a negative allometric growth for both sexes. Growth parameters were estimated as L∞ = 45.0 cm, K = 0.27 yr-1, t0 = -0.23 yr. The instantaneous coefficients of natural, total and fishing mortality were estimated as 0.40 yr-1, 0.75 yr-1 and 0.35 yr-1. The results showed that S. trutta fario is moderately a rapidly-growing species in Lar dam. The exploitation rate was 0.47. Therefore, the population appeared to be in good condition in 2004. Salmo trutta fario growth parameters exploitation rate Lar Dam 2012 1 01 47 37 http://jifro.ir/article-1-441-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Growth parameters, mortality rates, yield per recruit, biomass, and MSY of Rutilus frisii kutum, using length frequency analysis in the Southern parts of the Caspian Sea P. Gheshlaghi p.gheshlaghi@gmail.com A. Vahabnezhad S. A. Taghavi Motlagh The growth and mortality coefficient of Rutilus frisii kutum, were estimated using length frequency data collected in southern waters of the Caspian Sea during October 2008 to April 2009. The following population parameters were evaluated: length-weight relationship, W = 0.004L 3.258, (r= 0.976) Von Bertalanffy growth constants, W∞ (g) = 4192.3, L∞ (cm) = 70.45, K = 0.2, per year t0 = −0.75 total mortality and its components, Z = 0.92, M = 0.36, F = 0.56 per year. The exploitation rate (E) was estimated about 0.6. The current yield per- recruit was estimated to be 279.15 g, which was only 1.2% less than Maximum yield per recruitment that was estimated as YPRmax = 287.535, it means if fishing mortality increases from 0.56 per year to 0.7 per year, the yield will raise by only 1.2%. The current YPR and maximum YPR, which were gained at fishing mortality of 0.7, showed that most kutum individuals are caught before reaching the length of maturity. Therefore, to get a maximum YPR, it is necessary to increase fishing effort, even higher than the optimum level. Keeping kutum fishing at the current level will permit harvest of the sustainable yield and avoid overfishing problems. Biomass Caspian Sea mortality Rutilus frisii kutum Exploitation rate 2012 1 01 48 62 http://jifro.ir/article-1-443-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Evaluation of different dietary protein and energy levels on growth performance and body composition of narrow clawed crayfish (Astacus leptodactylus) Z. Ghiasvand zaghiasvand@yahoo.com A. Matinfar A. Valipour M. Soltani A. Kamali Narrow clawed crayfish Astacus leptodacthylus Protein level Energy level diet 2012 1 01 63 77 http://jifro.ir/article-1-444-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 The effect of marine fish cage culture on benthic communities using BOPA index in Ghazale Creek N. Jahani jahani4563@yahoo.com S. N. B. Nabavi S. Dehghan Madiseh S. R. S. Mortezaie N. Fazeli  The present work has been carried out to investigate the probable effects of fish cage culture on benthic communities as a pollution and stress indicator and to evaluate the biotic health condition using BOPA index, in Ghazale Creek (Khowre-Mussa - Persian Gulf). Monthly sampling from 4 stations was carried out from June 2007 to March 2008 (during nine months). Stations were selected from under the cage to 400 m distant (as control site) in Ghazale Creek. Three samples were taken at each station for macrobenthos and one for sediment grain size and total organic matter (TOM), using a 0.0125 m2 van veen grab. Also physical-chemical parameters sampling from three stations was done (during nine months). Stations were under cage station, 50 m and 400 m far from cages in Ghazale Creek.The percentage of total organic matter (TOM) in sediment ranged from 6.11 to 23.26 and the range of silty-clay percentage was from 4.76 to 97.47. The dominant macrobenthos groups were Polychaets (60.62%), Mulluska (19.67%), Crustacea (16.49%). Macrobenthic abundance, biomass and diversity index values in the under cage station were less than that in the control station. Comparing the results of BOPA with the guidelines shows that all stations had bad environmental conditions. The under cage station was more polluted than the control station. The range of physical-chemical parameters in water were: DO ­(6.5-11.43) ppm,­ BOD ­(1.5-10.9) ppm, Salinity (43-45.6) ppt, NO2- (0.006-0.29) ppb, NO3- (3.98-32.2) ppm, Turbidity (14-70)­ NTU temperature (11.8-32.5) ° C. Marine fish Cage culture Macrobenthos community BOPA index Physical-chemical parameters Ghazale Creek Persian Gulf 2012 1 01 78 88 http://jifro.ir/article-1-445-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Development of a bycatch reduction device (BRD) for shrimp beam trawl using flexible materials Bong-Jin Cha Sam-Kwang Cho skcho@nfrdi.go.kr Heui-Chun Ahn In-Ok Kim R. Craig   This study aimed to design a bycatch reduction device (BRD) for shrimp beam trawl, which is manufactured by flexible materials to reduce bycatch for the gear in the South Sea of Korea. The model test was carried out to understand the shape of the gear in the water and to measure the variation of flow speed due to the BRD in a circulating water channel. Catches were compared between a shrimp beam trawl without BRD (control gear) and others with BRD (treatment gears) in the field. BRDs were two different types in this study. In the case of BRD (a), a square-shaped grid net and a funnel-shaped net were installed in the front part of the cod end to help fish sorting and expelling through the outlet at the bottom. BRD (b) has one more outlet which is added at the upper part of the BRD (a). On the model test, water speed was reduced a little in the gear by installing the BRD. At the results of comparing with a control gear, the bycatch (%) of fish excluding shrimp was reduced between 17 and 68% using BRD (a) and 5 and 66% for BRD (b) respectively. By the signed test of significant level 0.05, the quantity of shrimp catches for BRD (a) was not different in comparison to the control gear but it decreased for the gear installing BRD (b). Shrimp beam trawl BRD Bycatch Flexible materials Model test Field Test 2012 1 01 89 104 http://jifro.ir/article-1-446-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Effects of organophosphate, diazinon on some haematological and biochemical changes in Rutilus frisii kutum M. Mohammad Nejad Shamoushaki Majid_m_sh@yahoo.com M. Soltani A. Kamali M. R. Imanpoor I. Sharifpour H. Khara   The acute toxicity and effects of diazinon on some haematological parameters of kutum (Rutilus frisii kutum, Kamensky, 1901) weighing 613.33 ± 157.06 g were studied under static water quality conditions at 15 °C ± 2 ºC. These experiments were carried out based on the standard TRC, 1984 method over 4 days, and controlled for the effective water physicochemical factors having pH rangesof 7-8.2, total hardness 300 mgl-1 (caco3), dissolved oxygen 7 mgl-1. The results showed that the 96h LC50 value of diazinon was 0.4 mgl-1 and that the maximum allowable concentration (MAC) value of this toxin was 0.04 mgl-1. The second stage of experiments consisted of four treatments: LC0: 0 as blank, treatment A with a concentration of LC1: 0.107 mgl-1, treatment B with a concentration of LC5: 0.157 mgl-1, treatment C with a concentration of MAC value: 0.04 mgl-1. Male brood stocks of R. frisii were treated with these concentrations for 45 days. The results showed that long-term exposure to diazinon causes a decrease in the erythrocyte count (RBC), haemoglobin (Hb), haematocrit (PCV), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), leucocyte count (WBC), lymphocyte, testosterone, iron (Fe), sodium (Na), lactate dehydrogenase (LDH) and cholinesterase (CHeS) (P<0.05). Diazinon also causes an increase in prolymphocyte, aspartate aminotransferase (AST), cholesterol, alkaline phosphatase (ALP) and adrenaline (P<0.05). There are no significant effects on monocyte, eosinophil, magnesium (Mg), chloride (Cl), glucose (BS), urea (BUN), uric acid (U.A) , triglyceride (TG), calcium (Ca), albumin (Alb), total protein (TP), cortisol , noradrenaline and high density lipoprotein (HDL) levels in R. frisii male brood stocks (P>0.05). The results showed that long-term exposure to low concentrations of diazinon causes changes in some haematological and biochemical parameters of R. frisii male brood stocks . Diazinon Haematological Biochemical Rutilus frisii kutum 2012 1 01 105 117 http://jifro.ir/article-1-447-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Effects of different three live foods on growth performance and survival rates in Beluga (Huso huso) larvae M. Mohseni M. Pourkazemi S. H. Hassani O. E. Okorie T. S. Min S. C. Bai scbai@pknu.ac.kr   To determine the best live food and to reevaluate the optimal weaning period for beluga fish (Huso huso) larvae, seven experimental diets: Daphina (DP), Chironomids (CH), Gammarid (G), Daphina + formulated diet (DPFD), Chironomids + formulated diet (CHFD), Gammarid + formulated diet (GFD ) and formulated diet (FD ) in triplicate groups were fed to 4662 sixteen-days-old larvae which were captured from the stock tank and randomly distributed into 21 tanks. The microdiets contained 48-50% crude protein, 12-13% crude fat, 9-11% moisture and 8.5-9.5% ash . After 25 days feeding trial, weight gain (WG), specific growth rate (SGR) and feed efficiency (FE) of fish fed CHFD were significantly higher than those of fish fed the other diets ( P< 0.05) . Frequent cannibalism and higher mortality in larvae fed G, GFD and FD diets were observed. These results may show the importance of live food followed by formulated diets in a gradual application pattern, as early as on the fourth to fifth day after hatching. Beluga larvae Huso huso Live food Specific growth rate Survival 2012 1 01 118 131 http://jifro.ir/article-1-448-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Effects of whey protein edible coating on bacterial, chemical and sensory characteristics of frozen common Kilka A. A. Motalebi motalebi@ifro.ir M. Seyfzadeh   The objective of the current study was to investigate the effects of whey protein coating on the quality of common Kilka during frozen storage. For this study, common Kilka was coated with 20% whey protein concentration. Non- coated Kilka also was used as a control. Coated and non-coated samples were then stored at -18 °C for six months. Bacterial, chemical and sensory properties of the samples were determined in each month. Results showed that Coliform, Escherichia coli and P seudomonas bacteria contaminations were negative until the end of storage period in the covered samples. Total bacterial counts and Staphylococcus bacteria count were lower in the test samples compared with the control samples. Humidity, protein, lipid, ash and calorie contents were higher in test samples as compared with the control samples, while peroxide value, free fatty acids, thiobarbitoric acid, TVN and pH were lower in test samples. Taste, odor, color, tissue and overall acceptability were studied in the test and control samples. These specifications had a better quality in test samples compared with the control ones. These factors showed a significant difference in the uncoated samples (control) (p<0.05). Significant decrease was observed in bacterial counts in the covered and control samples. According to the statistical analysis in sensory specifications, there was a significant difference between the covered samples and the control ones (p<0.05). According to the results of experiments and statistical analysis, the covered samples had a favorable quality until the end of storage period but the control samples had lost their quality after three months. Edible film Whey protein Chemical analysis Sensory analysis Kilka fish 2012 1 01 132 144 http://jifro.ir/article-1-449-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Titration of the Iranian White Spot Virus isolate, on Crayfish Astacus leptodactylus and Penaeus semisulcatus F. Motamedi Sedeh fmotamedi@nrcam.org M. Afsharnasab M. Heidarieh S. K. Shafaee S. Rajabifar A. Dashtiannasab M. H. Razavi   White Spot Virus (WSV) is currently the most serious viral pathogen of shrimp worldwide it causes mortality up to 100% within 7-10 days in commercial shrimp farms. Infected Indian white shrimp Fenneropenaeus indicus samples were collected from Guatr shrimp site in Sistan and Baluchestan province in south of Iran and WSV infection was confirmed by Nested PCR. WSV was isolated from infected shrimp samples by centrifugation and filtration and multiplied in crayfish by intramuscular inoculation, the isolated virus was called WSV/IRN/1/2010. In order to determine the dilution resulting in 90-100% mortality in Penaeus semiculcatus, diluted virus stock in steps from 100 till 105 times in sterile PBS was injected intramuscularly to 14 shrimps in each group. Also the virus stock was diluted in steps from 1/2 till 1/32 times in sterile PBS and injected intramuscularly in Astacus leptodactylus crayfish. Therefore the LD50 of live virus stock in Astacus leptodactylus and Penaeus semiculcatus crayfish were calculated by the Karber method 10 3.29 /ml and 10 5.35 /ml, respectively. White Spot Virus Titration Karber Formula Astacus leptodactylus Penaeus semisulcatus 2012 1 01 145 155 http://jifro.ir/article-1-450-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Ectoparasite infection of Carassius carassius in water resources of west Azerbaijan, Iran S. Rasouli Sohrab_rasouli86@yahoo.com A. Nekuifard D. Azadikhah H. Ahari A. A. Anvar A. Khodadadi A. Ghasemi   Various parasite species were found in Carassius carassius including Diplostomum spathaceum, Dactylogyrus sp.,Gyrodactylus sp. Ichthyophthirius multifiliis and Trichodinia sp . They were found in four rivers in West Azerbaijan Province (North-Western Iran) . A total of 207 live Carassius carassius from four rivers including Aras (72) Zariyneh (42) Nazlo (58) and Barandoz (35) were studied. Parasitological surveys were carried out on gills and external organs. The results showed that Diplostomum spathaceum (70.83%) Dactylogyrus sp. (38.88%) Gyrodactylus sp. ) 22.22%) Ichthyophthirius multifiliis (48.61%) Trichodinia sp. (8.33%) Chilodonella sp. (12.50%) and Argulus sp. (76.19%) were found in fish from Aras Rive so that the result showed, Spathaceum (63.79%) Dactylogyrus sp. (36.20%) Gyrodactylus sp. (25.86%) Ichthyophthirius multifiliis (44.82%) Trichodinia sp. (18.96%) Chilodonella sp. (12.06%) and Argulus sp. (6.89%). Argulus prevalence was greater in Barandoz River while Chilodonella in Zariyneh rud River . In Barandoz River, Diplostomum spathaceum (65.71%) Dactylogyrus sp. (37.14%) Gyrodactylus sp. (22.85%) Ichthyophthirius multifiliis (31.42%) Trichodinia sp. (25.71%) Chilodonella sp. (8.57%) and Argulus sp. (5.71%) were reported, respectively. Finally, in Zariyneh rud river, the followings have been reported: Diplostomum spathaceum (76.19%) Dactylogyrus sp. (21.42%) Gyrodactylus sp. (14.28%) Ichthyophthirius multifiliis (52.38%) Trichodinia sp. (23.80%) Chilodonella sp. (14.28%) and Argulus sp. (7.14%). It should be noted that prevalence , intensity and host parasite relationship will be discussed in details in this article. Carassius carassius Ectoparasite Water resources Iran 2012 1 01 156 164 http://jifro.ir/article-1-457-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Metal concentrations in razor clam Solen dactylus (Von Cosel, 1989) (Bivalvia: Solenidae), sediments and water in Golshahr coast of Bandar Abbas, Persian Gulf H. Saeedi hanieh.saeedi@gmail.com A. Ashja Ardalan B. Hassanzadeh Kiabi R. Zibaseresht  In a complementary field study, the concentrations of some metals (Cu, Ag, Pb, Zn, Ni, Co, Mn, Fe, As, Cd, Cr, Mg and Ba) were measured in clam Solen dactylus, sediments and water collected at two stations (Park-e-Qadir, 56° 20/ E, 27° 11/ and Nakhl-e-Nakhoda, 56° 23/ E, 27° 10/ N) of Bandar Abbas coastal waters of the Persian Gulf in November 2008 and February 2009 showing different contamination levels. Although there is little information on metal concentrations in macro-benthic animals in this area, this study, for the first time, reports the accumulation of some metals in S. dactylus in order to introduce this species as a bioindicator for this area. Results indicated that Mg and Fe were the two most abundant metals in clams and sediments. The maximum and minimum metal concentrations in clams belonged to Mg (3850-5040 µgg-1 dry wt) and Ag (0.30-0.40-0.58 µgg-1 dry wt), respectively. There was a significant relationship between the accumulation of metals in clams, sediment and water samples. A significant relationship between clam lengths and concentrations of Cu (positive) and Mg (negative) were observed. Our study also showed that variable metal concentrations were related to different sampling stations, seasons and their interactions as well. Bioaccumulation of metals in clams was significantly different for eight metal elements between start of the gametogenesis and ripeness stages. Our investigation indicated that the clam S. dactylus could be a useful bioindicator for Zinc.    Metal Bioaccumulation Bioindicator Solen dactylus Sediment Water Persian Gulf 2012 1 01 165 183 http://jifro.ir/article-1-451-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Mangrove vegetation and community structure of brachyuran crabs as ecological indicators of Pondicherry coast, South east coast of India P. Satheeshkumar indianscientsathish@gmail.com   Baseline ecological studies of Pondicherry mangroves are important for monitoring, management and conservation of mangrove ecosystems. A brachyuran crab faunal assemblage at four stations of Pondicherry mangroves is described and monthly samplings were made during September 2008 – August 2009. Totally 22 species of brachyuran crabs belonging to 12 genera and 5 families were recorded crabs belonging to the family Portunidae and Ocipodidae are most dominant group represented by total of 16 species. Six species considered are as a commercially important and out of which, on three species Scylla serrata, Thalamitta crenata and Portunus sanguinolentus are catch large quantities from stations 1 and 2. Portunus pelagicus, P. sanguinolentus and T. crenata were totally absent in stations 3 and 4. Population densities of brachyuran fauna ranged from 29 -71 ind. m2, the diversity ranged from 0.96 -2.18 bit. ind -1, the richness varied from 0.42 -0.74, and the evenness varied from 0.41 -.072. Maximum diversity values were recorded during post monsoon. The crab community recorded was analyzed by univariate and multivariate statistical techniques. Crab community structure was correlated with vegetation structure, and environmental factors were positively correlated with surface water pH, salinity, tree dominance, tree diversity and tidal inundation and negatively correlated with sulphide, organic matter, senescent leaves and decaying leaves, suggesting that the mangrove vegetation is important to the crab fauna as a habitat and food supply. Brachyura Crustacea Decapoda mangrove Pondicherry 2012 1 01 184 203 http://jifro.ir/article-1-452-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Changes of fatty acid profiles in fillets of Cobia (Rachycentron canadum) during frozen storage S. Taheri shahrooztaheri@yahoo.com A. A. Motallebi A. Fazlara A. Aghababyan Y. Aftabsavar   In this study changes in fatty acids profile during frozen storage at -18°C of Cobia (Rachycentron canadum), caught from the Persian Gulf (Bandar Abbas) were studied. Changes in saturated fatty acids (SFAs), monounsaturated fatty acids (MUFAs), polyunsaturated fatty acids (PUFAs), EPA+DHA/C16, n-3 PUFA/n-6 PUFA (n-3/n-6) and polyunsaturated fatty acids /saturated fatty acids (PUFA/SFA) were investigated during a six- month storage at -18°C. Eighteen fatty acids were found in Cobia, with higher percentage of saturated fatty acids (46.07%), monounsaturated fatty acids (33.72%) and polyunsaturated fatty acids (15.44%). The MUFAs and PUFAs reduced from 33.72 to 26.26% and 15.44 to 10.78%, respectively. Palmitic acid (C16:0, 27.42% of total fatty acids) and stearic acid (C18:0, 12.62%) were the dominant saturated fatty acids. The major unsaturated fatty acids were determined as docosahexaenoic acid (C22:6n3, 5.76%), oleic acid (C18:1n9, 25.76%) and linoleic acid (C18:2n6, 4.38%). As a result of the frozen storage (up to 6 months), marked content decreases were found in fatty acid groups such as monounsaturated, polyunsaturated and n-3 polyunsaturated, as well as in the n-3/n-6 ratio and it means that the nutritional value of Cobia has decreased. Cobia Fish Fatty acids Frozen storage 2012 1 01 204 213 http://jifro.ir/article-1-453-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Genetic parameters estimation of growth in Salmo trutta caspius as a function of body weight and Length M. Yousefian yousefianeco@yahoo.com H. Hosseinzadeh-Sahafi H. Golshahi F. Laloei M. Tagavi A. Taheri Y. Seidanloo   There is no available adequate information on the biology and genetics of the Caspian salmon (salmo truta Caspiu) living in the Caspian Sea with other species such as common carp families, sturgeons and etc., therefore we are interested in knowing whether selection for rapid growth rate in salmo trutta Caspius will potentially lead to correlated genetic response in body weight and length. The potential for correlated responses was evaluated by the heritability estimation, estimating heritabilities of body weight and length. The genetic parameter estimations were obtained for different stages of growth from 5400 fish consisting 27 unrelated families that reached maturity at 36 months of age. The parent which used to produce separate family groups had been caught from the Caspian Sea and spawned during the autumn season. The estimated heritability of body weight and length was 0.42±0.13 and 0.49±0.01, respectively based on differential and selection response between parent pairs and their offsprings. Several factors may have affected the creation of this high level of estimation, dominant effect, inherited from different breeders to offspring.   Salmo trutta caspius Genetic parameters Heritability Caspian Sea 2012 1 01 214 222 http://jifro.ir/article-1-454-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Short Communication: Ichthyotoxism in Capoeta capoeta gracilis (Keyserling, 1861) from west of Urmia ( Marmisho Lake), Iran m. Ramin mrifro@yahoo.com s. Shiri m. Doustdar Capoeta capoeta gracilis Cyprinidae. Ichthyotoxine poisoning Urmia 2012 1 01 223 225 http://jifro.ir/article-1-455-en.pdf
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Iranian Journal of Fisheries Sciences IJFS 1562-2916 10.18869/acadpub.ijfs 2012 11 1 Short Communication: On the record of the red cornet fish Fistularia petimba (Syngnathiformes, Fistularidea) in Jask port, the Oman sea M. Yasemi yasami_m@yahoo.com Fistularia petimba Midwater trawl Oman sea Morphometric Meristic Jask port 2012 1 01 226 234 http://jifro.ir/article-1-456-en.pdf