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  • 1
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    Providing brood stocks of Caspian trout (Salmo trutta caspius) from Mazandaran Rivers and production of one hundred thousand fries (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian trout (Salmo trutta caspius) is one of valuable fishes of the Caspian sea for people living in the Northern coastal area of Iran. Since fish stock and natural resources protection is one the Iranian fisheries research objectives, the most activity on Caspian trout rehabilitation was focused on releasing thousands of smolts in the rivers discharge to Caspian Sea. Catch statistics of this species has declined over last decades thus this study on quality of provided brood stocks and producing fries with suitable quality can help rehabilitation and rearing of this valuable species. Several rivers were considered for providing brooders to keep genetic resources variety of sea stocks. In spawning season 25 (9 male, 16 female) and 30 (5 male, 25 female) brooders were collected from fishermen in Mazandaran rivers and Gyilan coasts provinces respectively. After propagation and larvae rearing, 11500 (10-15 g.) and 50000 (less than 10 g.) juveniles were released in Gyilan and Mazandaran rivers respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Caspian trout ; Salmo trutta caspius ; Brood stocks ; Rehabilitation ; Fisheries ; Species ; Rearing ; Genetic ; Propagation ; Juvenile
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 32pp.
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  • 2
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    Introducing three species of Echinoids (order Echinoidea) in southern intertidal zone of Qeshm Island, the Persian Gulf (2017)
    Details
    Publication Date: 2021-05-19
    Description: A one-year study (May 2007-April 2008) was undertaken to identify the echinoid species of intertidal sandy and rocky shores of the Qeshm Island. An intertidal sandy location and a rocky shore were surveyed in southern coasts of Qeshm Island, in northern Persian Gulf. Specimens were monthly collected along two 30m wide by 30 60m long (according to the tidal range) transects located approximately 300m apart, perpendicular to the sea, in each shore. Sampling was accomplished using 0.25m 2 quadrat along each transect in the rocky shore, and by walking along nine 10×10-30m transects along each transect in the sandy shore. Three species of echinoids, belonging to 3 families were identified including: Clypeaster reticulatus, Diadema setosum and Echinometra mathaei. Identifications were verified by National Museum of Natural Science, Taiwan. While Clypeaster reticulatus belongs to sandy habitats, none of the identified species were observed in sandy location.
    Description: Published
    Keywords: Echinoids ; Echinoidea ; Invertebrate ; Echinoderms ; Echinometra mathaei ; Diadema setosum ; Clypeaster reticulatus ; Introducing ; Species
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.161-164
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  • 3
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    Morphometrics studies of Mahisefid (Rutilus frisii kutum, Kamensky, 1901) from selected rivers in the southern Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Mahisefid, Rutilus frisii kutum , is a cyprinid fish which is distributed from Turkmenistan to Azerbaijan along the Caspian Sea. It is one of the economically important fish in the region. As part of the Iranian Fisheries Company’s policy to improve the stocks of this species, every year, fingerling of Mahisefid are released into the southern basin of the Caspian Sea. The main objective of this study was to determine populations in different of rivers. In total, 387 fish were collected from four rivers, including Lemir, Sefidrood, Shirrood and Tajan, where this fish migrates for spawning, in spring 2005. Thirteen conventional morphometric factors, 13 ratio and 12 Truss morphometrics were measured and calculated in this study. Conventional and Truss morphometric data were analyzed using two-way ANOVA Principal Component Analysis and discriminant. Average of coefficient of variation (CV%) of morphometric in males was 14.95, 10.28, 17.47 and 16.56 and in females was 21.35, 19.74, 18.25, and 19.74 in Lemir, Sefidrood, Shirrood and Tajan River, respectively, showing that all morphometric characters were significantly different (P〈0.05) among four sampling sites (populations). The first component of morphometrics 44.32% in males and 68.94% in females were positive, indicating that the conventional morphometric was good descriptor of the body shape variation among the populations, especially in females. The total cumulative variances were 76.6% and 87.8% in males and females, respectively, suggesting that this can be considered as a useful discriminator. The total cumulative variances were 64.27% and 64.21% in males and females, respectively. The first component of truss was 87.7% and 81.3% of the total variance, in males and females, respectively. The results of the present study suggest that each sampling site represents independent population in each river.
    Description: Published
    Keywords: Rutilus frisii kutum ; Conventional Morphometric ; Truss Morphometric ; Rutilus frisii kutum ; Principal Component Analysis (PCA) ; Mahisefid
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-18
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  • 4
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    A Survey about Existence Currency of Warm Water Fish in Northern Alborz (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Aquaculture is the most important part of Fisheries Organization duties in Iran. During several planning and developing programs, aquaculture productions had a considerable growth. Due to good potential, these productions were higher than the planed one. The North Alborz regions were investigated by four groups of experts. The regions which investigated were including 3 important provinces (e.g. Guillan, Mazandaran and Golestan). The area where investigated was 940 km along with coastal zone of Caspian Sea or 58678 km2 in total. Around 27% of aquaculture production came from this region. However, subdivision of fisheries can play important role in the economics in the region. The fisheries sub-sector has an important role in the economy of the region, and despite the great potential for agriculture and tourist industries in the North Alborz, there is a significant role in the prosperity of the fisheries activities. In the present study shows that Mazandaran and Guillan provinces has more potential in reservoirs and aquaculture production when compared with other provinces. Productions in Mazandaran either in reservoirs were less than Guillan province. Due to lee in reservoirs, Mazandaran had less investment when compared with Guillan province. The figures show that carrying capacity of aquaculture production for 3 provinces (Mazandaran, Guilan and Golestan) was higher than other provinces in the entire country. Due to, large land base, less investment, more interesting of farmers, no needs of complicated technology, farmer would be able to develop reservoirs as consequences to enhance productions. However, developing reservoirs and supporting of it's; can increase the contribution of warm water species in inland water.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Existence Currency ; Warm Water ; Fish ; Aquaculture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 138pp.
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  • 5
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    Study on feasibility of live Cobia (Rachycentron canadum) capturing in northern waters of Persian gulf & Oman sea (Hormozgan province) and rearing them to subadult stage in concrete tanks (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In order to obtaine live individuals of cobia ( Rachycentrun canadum ) , coastal waters of Jask, Sirik, Kolahi , Bandar Abbas, Bandar-e Lengeh ,Bandar-e Bostaneh and Abu moosa ,Hormoz and Qeshm Islands have been surveyed from March 2008 to January 2010 in Northern waters of Persian Gulf (Hormozgan province). All in all 60 alive fishes obtained from fishing boats and transferred to Aquaculture Department of Persian Gulf and Oman Sea Ecological Research Institute (PGOSERI), but 50 of them died and only 10 fish survived. They divided in two groups and cultured in separated concrete tanks. Fished were fed with trush fish twice a day at a feeding rate of 4-5 percent of body weight. Culturing period last about 6 months. All the fishes gradualy died through the culturing period. Average of specific growth rate in group 1 and 2 were about 0/49 and 0/77 respectively. The weight gain for group 1 (WG) was %75 for 75 days of calturing time and % 142 for 190 days of culturing time while for group 2 it was %31 for 54 days of culturing time and % 75 for 190 days . Average weight of fishes belong to group 1 reached from 950(g) to 2150 (g) during 6 months, while group 2 reached from 872(g) to 1271/5 (g) in 3 months. Feed conversion rate (FCR) for group 1 and 2 were respectively about 6.9 and 6.8. With regard to cost of trash fish (about 2000 Rials per kilogram trash fish) the per unit feed cost of cobia production were 13613 and 13730 Iranian Rials per kilogram, respectively for group 1 and group 2. Results revealed that obtaining live individuals of cobia is very difficult and also cobia didn t grow well in concrete tanks but if we have better coopreration of local fishermen and also provide some Equipment such as cages in order to rear cobia in the sea , it is possible to achive more succes and obtaining better results .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecological ; Rachycentron canadum ; Cobia culture ; Specific growth rate ; SGR ; Alive capture ; Survey ; Aquaculture ; Concrete tanks ; Fish ; Coastal waters ; Aquaculture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 50pp.
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  • 6
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    Study on propagation and breeding of Hamoun fish (shizothoraxzarudnyi) to one gram weight in earthen pond (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Hamoun fish, Schizothorax zarudnyi, is an indigenous species of the eastern waters of Iran, which is exclusively found in this region. However recently drought occurrence in the Chahnimeh reservoirs (a semi natural water body) making them vulnerable to extinction. As an appropriate action to address this problem and according to the 3 side contract between Italian Government – UNDP - Islamic republic of Iran Government and the Italian government financial support to reduce poverty in the Province of Sistan-Baluchestan through the reinforcement and dissemination of aquaculture activities the project was developed at the Hamoun Research Unit by the Chahbahar Fisheries Research Center to record the breeding normative of 1 g weight larvae for restocking and other researching purposes. 331 broodstocks of the indigenous species Shizothorax zarudnyi weighing 800-2450 g were collected from the Chahnimeh reservoirs in early autumn, 2006. From 5/3/2007 ( the project is supported and communicated on 2010) , Ovulation was stimulated with three stimulators; pituitary extract (3-6 mg kg-1 body weight), GnRH-A (20-30 mg kg-1 body weight) and anti dopamine (10-15 mg kg-1 body weight) that was given in 2-3 doses to breeders. Of 169 injected breeders , some were injected On mid March of 2007 (12-13 ºC water tempreture) responded to the injection 25% ,while the rest were injected On April of 2008 (14-16 ºC water tempreture) responded to the injection 65%. In the present project of 167 breeders 82 were female and 87 male. Totally 30 female breeders released their eggs in different stages. 20 female breeders released their eggs completely, 3 breeders released half of their eggs and 7 released 1/3 of their eggs. The male breeders just injected in the final dose of hormontrapy and all were ready for releasing sperms however the ovulation in female breeders occurs between 353-428 h ºC and after the final dose of injection. Ripe eggs were stripped from the females and fertilization was done by the dry method. Fertilized eggs were transferred to veis incubators and troughs. Incubation period for eggs differs and larvae hatch out after about 910 days at an average water temperature of 12.5 °C. Maintained at 13-14 °C, complete absorption of yolk sac in Shizothorax zarudnyi larvae occurred after 5-8 days. Larvae were fed with a mixture of powdered milk and egg yolk in this stage followed by decapsulated Artemia cysts and nauplii of Artemia and then on formulated starter diets used for carps . Because the ponds were not ready, larvae were maintained in troughs for about ten days before they were transferred to two 1200 m2 earthen ponds where they reached a body weight of about 1 g. They were then handed over to the Iranian Fisheries department in the region. Larvae were fed with the starter feed SFCO in the earthen ponds. About 350 thousand larvae were stocked in two earthen ponds. Based on the results of present study and other studies we may conclude that artificial breeding in Schizothorax can be successfully achieved at 14-16 ºC in flow through systems using hormone therapy (combination of GnRha and anti dopamine) and larvae could be easily cultured in earthen ponds. However this species exhibits lower growth rates as compared to carps its high expenses could have an important role in economical feasible.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Economical ; Hamoun fish ; Schizothorax zarudnyi ; Breeding ; Species ; Aquaculture ; Temperature ; Female ; Eggs ; Hormontrapy ; Sperm ; Ovulation ; Larvae ; Fisheries ; Earthen ponds
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 71pp.
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  • 7
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    Heritability estimation for growth-related traits in juvenile wild common carp (Cyprinus carpio L.) in the south of Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Wild common carp of the Caspian Sea is one of the important fish in the north of Iran, which has been introduced to inland aquaculture. Its genetic characteristics are investigated to set up for breeding programs that are still unknown. Using wild common carp in aquaculture is limited for uncontrolled variation in performance of fish derived from undomesticated breeders. A 7×7 factorial mating design was employed to examine genetic effects of dam and sire on growth and heritability of growth-related traits based on dam half-sib and sire half-sib families. Breeders were obtained originally from the Caspian Sea. A total of 1470 offspring were raised in 49 separate fiberglass tanks with common conditions. Body weight and length were recorded at three different ages of rearing. Estimation of heritability of weights ranged from 0.23±0.05 to 0.30±0.07 for dams and ranged from 0.15±0.03 to 0.26±0.04 for sire. Similar results were obtained with length but with less variation (0.24±0.02 to 0.26±0.01 for dams and 0.20±0.02 to 0.22±0.03 for sire). The broad-sense of weight and length are 0.23±0.04 and 0.23±0.01 respectively. The dam and sire effect on growth were significant, indicating the presence of variations among the native fish of the Caspian Sea. Therefore, it is suggested to use a length for selection that is more reliable and less affected by environment than weight at any time of growth and in respect of high phenotypic correlation (0.87-0.95) observed between weight and length. In the present study we even used wild common carp and the heritability was not higher than the domesticated common carp. It means the genetic variation for quantitative traits, for common carp of the Caspian Sea are low or it may be under pressure of inbreeding which should be studied further.
    Description: Published
    Keywords: Cyprinus carpio L. ; Common carp ; Heritability ; Genetic Parameter ; Juvenile ; Growth
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.740-748
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  • 8
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    Effects of endocrine disruption by 4-nonylphenol ethoxylate on the growth performance and immune response of female and male immature koi carp (Cyprinus carpio carpio) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Nonylphenol (NP) is an endocrine disrupting chemical which has been shown to be able tomodulate endocrine system of various organisms by different mechanisms. The objective of this study was to investigate the potential effects of 4-NP and 17-β - estradiol (E2) on the immune parameters (IgM levels and lysozyme activity) of the teleost Koi carp (Cyprinus carpio carpio) for a better understanding of the immunereproductive system interactions. The experimental fishes were injected with ascending doses (10, 50,100 μgg^-1 body weight) of 4- nonylphenol (4-NP) and (2 μgg^-1 body mass) of 17-β-estradiol (E2) or vehicle during 3 weeks. After 21 days, the fishes (180) were anesthetizedand their blood samples were collected from caudal vein, then they were dissected and sexually separated by gonad characters. The measurement of immune parameters in plasma showed that 4-NP induced significant increase in the IgM levels and lysozyme activity at dose of 50 μgg^-1 while the levels of these parameters in the higher doses (100 μgg^-1 ) decreased compared with the control group (p〈0.05). In addition the treatment, with 2 μgg^-1 E2 significantly decreased both the IgM levels and lysozyme activity after 21 days of injection. These results indicated that 4-NP and E2 could lead to disturb the balance of immune system with potential consequences for immature koi carp.
    Description: Published
    Keywords: 4-nonylphenol ; 17-β-estradiol ; Immune-reproductivesystem ; Immunoglobulin IgM ; Lysozyme ; Koi carp ; Cyprinus carpio carpio ; Disruption ; Growth performance ; Female ; Male
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.725-744
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  • 9
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    Genetic parameters estimation of growth in Salmo trutta caspius as a function of body weight and Length (2018)
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: Published
    Keywords: Salmo trutta caspius ; Genetic parameters ; Heritability ; Growth ; Body weight ; Length
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.214-222
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  • 10
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    A study on growth parameters, blood factors and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in underground brackish and freshwater (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this research, growth rate, blood parameters and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in brackish and freshwater were evaluated. Two treatments (brackish and freshwater) in 3 replications were investigated. Six 1.5 m³ fiberglass tanks were used for this experiment, containing 180 rainbow trout specimens with average weight of 47.2±0.1g. Feeding rate in treatments was about 3% of body weight based on water temperature and fish biomass. Total length and weight of fish were measured in 15 days intervals. After 135 days of culture period, some fish samples were transferred to the Lab. Blood were directly collected from the heart. Muscle composition was analyzed for proximate composition. The results showed that the body weight of samples in brackish water was increased significantly after 45 days of culture period. Blood factors including WBC, RBC, Hb, Hct, MCV, MCH, MCHC, lymphocyte, thrombocyte and concentration of K+ ions in fish cultured in brackish water showed a significant increase (P〈0.05). Muscle composition analysis showed a significant increasing (p〈0.05) in fat and dry matter in freshwater treatment, while moisture was significantly higher in brackish water (P〈0.01)
    Description: Published
    Keywords: Biology ; Physiology ; Oncorhynchus mykiss ; Brackish ; Rainbow trout ; Brackish water ; Freshwater ; Blood factors ; Proximate composition ; Growth ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.836-842
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