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  • Iran  (35)
  • Fisheries  (13)
  • Ecology
  • Iranian Fisheries Science Research Institute  (38)
  • Islamic Azad University, Science and Research Branch, Tehran, Fisheries  (1)
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  • 1
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    Determing some important extracted materials, such as: Alginates of sodium & calcium and alginic acid in three species of brown seaweeds (Sargassum illicifolium, Cystoseira indica and Nizimuddinia zanardinii) in coastal area of Sistan and Baluochestan Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25376 | 18721 | 2018-09-14 07:34:10 | 25376 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was determined some important extracted materials, Such as : Alginates of sodium & calcium and alginic acid in three species of brown seaweeds (Sargassum illicifolium , Cystoseira indica and Nizimuddinia zanardinii) during in different season in 1387 in coastal erea of Sistan and Baluochestan Provience. At First seaweeds sample were colected from sea beach and transferd to lab, so washed in fresh water and dried in the sun. So were under Alkaloid extraction with sodium carbonate (5 Persent), that were obtined fluid after filteration. The sodium alginate fibers extracted from fluid were combined by Alcohol. The calacium alginate fibers were deposited by calacium chlorids (5%) and Alginic acid resulted with chloridric acid (1N). The extraction yield of sodium alginate, calacium alginate and alginic acid in different samples of seaweeds with following Explaination: The presentage we have got, can be said , the present average of sodium alginate at Sargassum in Spring season in three areas (Chabahar, Tang and Pasabandar ) Respectively: 28.4±2 , 28.9±2 , 27.2±1.9 present, the present average of sodium alginate at Cystoseira in Spring in three areas at above mentioned goes in this way: 19.7±1.4, 18.6±1.4, 19.2±1.3 present and the present average of sodium alginate at Nizimuddinia in Spring were 23.4±1.5, 23.8±1.5 , 20.6±1.5 in these three areas. The present average of calacium alginate at Sargassum in Spring season in three areas (Chabahar, Tang and Pasabandar ): 33.7±0.5, 33.7±0.8, 33.1±1 present, the present average of calacium alginate at Cystoseira in Spring in three areas at above mentioned goes in this way: 28.8±1.5, 27.4±1, 27.4±1.5 present and the present average of calacium alginate at Nizimuddinia in Spring were 35.9±2.8, 23.9±1.5 , 35.9±2.8 in these three areas. The present average of Alginic acid at Sargassum in Spring season in three areas (Chabahar, Tang and Pasabandar ): 19.2±1.6 , 25.6±1.7 , 18.4±1.1 present, the present average of Alginic acid at Cystoseira in Spring in three areas at above mentioned goes in this way: 16.8±1.2, 15.8±1.1, 16.4±1 present and the present average of Alginic acid at Nizimuddinia in Spring were 19.2±1.6, 19.6±1.7 , 18.4±1.5 in these three areas. The present average of sodium alginate at Sargassum in Summer season in three areas (Chabahar, Tang and Pasabandar ) Respectively: 20.8±1, 21±1, 27.8±1.9 present, the present average of sodium alginate at Cystoseira in Summer in three areas at above mentioned goes in this way: 21±1.1, 13.2±1, 14.1±0.7 present and the present average of sodium alginate at Nizimuddinia in Summer were 25.3±2.3, 16.7±2.1, 15.3±1.3 in these three areas. The present average of calacium alginate at Sargassum in Summer season in three areas (Chabahar, Tang and Pasabandar): 29.5±2.1 , 29.7±2 , 28.3±2.2 present, the present average of calacium alginate at Cystoseira in Summer in three areas at above mentioned goes in this way: 21±1.1, 20.2±0.9, 20±0.7 present and the present average of calacium alginate at Nizimuddinia in Summer were 25.3±2.3, 29.7±2 , 23.1±1.5 in these three areas. The present average of Alginic acid at Sargassum in Summer season in three areas (Chabahar, Tang and Pasabandar): 19.5±0.7 , 19.7±0.6 , 18.7±0.7 present, the present average of Alginic acid at Cystoseira in Summer in three areas at above mentioned goes in this way: 21±1.1, 11.5±1.4, 11.1±1.5 present and the present average of Alginic acid at Nizimuddinia in Summer were 14.8±1.3, 15.3±1.3 , 14.6±1 in these three areas. The present average of sodium alginate at Sargassum in Autumn season in three areas (Chabahar, Tang and Pasabandar) Respectively: 31.5±4.3, 31.6±4.8, 29.4±4.8 present, the present average of sodium alginate at Cystoseira in Autumn in three areas at above mentioned goes in this way: 23±2.7, 21.4±2.8, 21.4±2.7 present and the present average of sodium alginate at Nizimuddinia in Autumn were 25.8±2.2, 26.4±2.1 , 23.4±1.9 in these three areas. The present average of calacium alginate at Sargassum in Autumn season in three areas (Chabahar, Tang and Pasabandar): 43.3±1.6, 42.8±2.7, 41.7±2.9 present, the present average of calacium alginate at Cystoseira in Autumn in three areas at above mentioned goes in this way: 34.3±5.9, 32.4±5.5, 30.9±5.2 present and the present average of calacium alginate at Nizimuddinia in Autumn were 50±7.1, 50.2±7.5, 45.6±5.2 in these three areas. The present average of Alginic acid at Sargassum in Autumn season in three areas (Chabahar, Tang and Pasabandar): 28±3.8, 28±3.5, 26±3.9 present, the present average of Alginic acid at Cystoseira in Autumn in three areas at above mentioned goes in this way: 20.2±1.8, 19.2±2.1, 18.7±1.6 present and the present average of Alginic acid at Nizimuddinia in Autumn were 25.9±3, 26.1±2.9, 24.6±3.6 in these three areas. The present average of sodium alginate at Sargassum in Winter season in three areas (Chabahar, Tang and Pasabandar) Respectively: 35±1.6, 35.2±1.8 , 33.8±1.9 present, the present average of sodium alginate at Cystoseira in Winter in three areas at above mentioned goes in this way: 24.1±2, 22.9±1.2, 23.3±0.7 present and the present average of sodium alginate at Nizimuddinia in Winter were 28.2±1.3, 29.2±1.7, 26.2±1.8 in these three areas. The present average of calacium alginate at Sargassum in Winter season in three areas (Chabahar, Tang and Pasabandar): 45.6±1.9, 45±2, 44.6±2.5 present, the present average of calacium alginate at Cystoseira in Winter in three areas at above mentioned goes in this way: 38.2±2.8, 35.9±3.4, 35.6±3.5 present and the present average of calacium alginate at Nizimuddinia in Winter were 56.4±3.5, 56±3.5, 51.8±2.5 in these three areas. The present average of Alginic acid at Sargassum in winter season in three areas (Chabahar, Tang and Pasabandar): 31.8±1.2, 32.1±0.9, 30.9±1.2 present, the present average of Alginic acid at Cystoseira in Winter in three areas at above mentioned goes in this way: 21.1±1.2, 20.4±1.4, 19.3±1.4 present and the present average of Alginic acid at Nizimuddinia in Winter were 26.4±2.1, 27±2.2, 24.6±2.2 in these three areas. The more amount of calacium alginate in Autumn can be found at Nizimuddinia in Tang area , wite amount of 50.2 present and the lates amount of Alginic acid at Cystoseira can be found in Summer with 11.1 present. If the Alginic acid become more than 20 present, it can be economical, that it can be showed more than 20 present in Autumn and Winter. According to this results, One way ANOVA showed that average of Alginates were not similar and significant differences ( P〈0.05 ) between species.
    Keywords: Biology ; Iran ; Sistan and Baluochestan Provience ; Chabahar ; Tang ; Alginic acid ; Species ; Brown seaweeds ; Sargassum illicifolium ; Cystoseira indica ; Nizimuddinia zanardinii ; Chloridric acid ; ANOVA ; Sodium ; Calcium ; Seaweeds
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 74
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  • 2
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    An investigation effect of seaweeds as shrimp -feed ingredient for growth performance of Litopenaeus vannamei (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25446 | 18721 | 2018-09-25 18:05:26 | 25446 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this project, the nutritional effects of Sargassum illicifolium Chabahar bay-Oman Sea, on growth and survival rates of whiteleg shrimp (Litopenaeus vannamei) were studied. The seaweed collected from 6 coastal area, rinsed, dried, powdered and measured the nutritional values in laboratory for surveying statistically. According to the high nutritional value of Tis coastal seaweed, this variate seaweed powder, replaced with protein resources (fish meal and Soy and Wheat) of whiteleg shrimp feed which was formulated by Havorash feed factory of Boshehr in four treatments (A: as control without any replacement) B: with 5%, C: 10 % and D: 15% seaweed replacement, each with three replicates in order to obtain isonitrogenus 33% CP., and Isocaloric (13% fat and 15% carbohydrate) feed. The weighed milled ingredients were carefully mixed using a laboratory food mixer. The mixtures were primed with 30% hot water to yield a suitable pulp. Wet diets were made into 2 mm pellet size and dried at 40 °C in a drying cabinet and maintained in standard condition which was used according to daily need shrimp, calculated by each 10 days biometry. Water stability and absorbtion capacity of the pellets in sea water were measured and compared statistically. Juvenile shrimps (Initial body weight =3 g) brought from Jask hatchery, acclimazed for one week in Chabahar hatchery condition and feeding daily 3-5% body weight. Abiotical parameters and weight and length biometrics were measured two days and 10 days, respectively. After 45 days and final biometry, FCR, CF, SGR, caracas analysis, muscle colourimetery with HPLC were done, tasted with pp Plot for determining the parametric data and statistically differences using one – way ANOVA, Duncan test of SPSS software. The Tis coastal seaweed with 9.8% CP, 2% lipid and 23% carbohydrate had higher nutritional value compared to the other gathered seaweed. Also amino acid and fatty acid profiles, vitamins and minerals were measured in all seaweed samples each, with three replications. As result, the water stability of D feed treatment in seawater (98%) and C (97%) had statistical differences with A and B (95% stability) (P〈0.05). Water absorption capacity of feeds after one hour immersion in seawater showed significance difference between D (110%) and three others, C(100%), B(85% and control(80%) (P〈0.05). Shrimp growth data, after the end of experiment revealed that seaweed feed treatments had no any differences with control group significantly. However, the absolute growth rate datas of D treatment were higher than others and the lower weight and lenght were measured in control group shrimp. FCR had difference between seaweed treatments and control statistically. There are no any differences between caracas lipid treatments (P〉0.05) but Cholestrol content of, showed differences between all, significantly (P〈0.05) which was the highest (121.68±12.12) in D and the lowest in A (147.92±11.02). Feed treatment D and C performed colour changes pink partial orang and pink in shrimp muscle with no any difference compared to white and none colour in shrimp were fed B and A feed treatments . It seems this colour changing can be playing a major role in market acceptability.
    Keywords: Aquaculture ; Iran ; Oman Sea ; Sargassum illicifolium ; Biochemical composition ; Replacement ; Litopenaeus vannamei ; Growth performance
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 87
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  • 3
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    Cryopreservation of rainbow trout (Onchorhynchus mykiss) semen (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25512 | 18721 | 2018-10-05 15:26:26 | 25512 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Breeding has moved beyond the point of simply propagating random stock. Genetic potential can be improved by establishing and crossing genetically defined strains, crossing species and manipulating gametes. Some of these activities require cryopreservation of semen. Cryopreserved sperm could also be a means of exchange of genetic material between locations and populations when transportation of live fish is restricted. In this study we had a survey on rainbow trout sperm quality in Genetic and Breeding Center for Coldwatwr Fishes, Shahid Motahari, Yasouj. Then Cryopreservation trials on rainbow trout (Oncorhynchus mykiss) sperm were carried out using six basic extenders. Egg batches of 25 g were inseminated with semen frozen in five 0.5-ml straws. Thowing temperature of cryopreserved sperm also was tested. In anather trial we investigate different cryoprotectant. The result showd that the best period for sperm collection in this center was from Novamber to January. The best extender based on sperm motility parameters were extender 2 and 1 with 57.2 and 56.9% fertilisatin rates, respectively. So this two extender were used in the further experiments. The best thowing temperathre was 25°C in 30s. Testing different cryoprotectant, adding 10% methanol to extender 1 gave the highest fertilization rate (64.6%) among cryoprotectant that used with this extender. In the other extender (2) adding 5% DMSO and mixture of 5% DMSO and 1% glycerol gave the highest fertilization rates (64.8% and 67.0%, respectively). In conclusion using extender 1 and 2 with mentioned cryoprotectant and thowing rate of 25°C in 30 s was recammended for rainbow trout sperm cryopreservation.
    Keywords: Aquaculture ; Iran ; Yasouj ; Sperm cryopreservation ; Rainbow trout ; Extender ; Cryoprotectant ; Onchorhynchus mykiss ; Breeding ; Genetic ; Coldwater ; Temperature ; Fertilization
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 51
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  • 4
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    Planning and establishment of the laboratory information database system for Iranian fisheries research organization (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
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    Publication Date: 2021-05-19
    Description: Due to lack of access to comprehensive and up-to-date information regarding equipment, personnel, laboratory services tariffs and chemicals in the laboratories of Iran Fisheries Research Institute and felt the necessity of having this information for optimal management of the laboratories, it was decided with regard to all information needs in this area and using previous experiences in this regard as well as the experiences of other institutions and related organizations at the national (and even international) level, the system would be designed. The main purpose of implementing this plan was to establish and implement a software system based on web technology to create a comprehensive database of the Fisheries Research Institute's laboratories, so that in addition to organizing information, using periodic reports on various related areas a more appropriate monitoring and management system could be applied. Fortunately, after the design and implementation stages, the system in early January 2011 was fully applicable. The main parts of this system include portal; database; advanced data entry, search and reporting capabilities; direct tests order system and discussion forums.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Laboratories ; Information Database System ; Fisheries ; Chemical ; Portal ; Iranian Fisheries Research Organization
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 38pp.
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  • 5
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    Environmental and ecological studies in Northern Alborz with aimed at developing the fisheries resources (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Caspian Sea with an area of 400 thousand square kilometers is the largest lake in the world. The Caspian Sea about 1200 km from north to south on the longest section and an average width of 320 km. Along the coastline around the Caspian Sea is about 6500 kilometers. Caspian Sea is about 78,000 cubic kilometers of water volume that is 44% of stocks of blue lakes around the world. Caspian Sea basin, which is composed of seven major basins of the main watershed from west to east are: juniper, Talsh- Anzali, large Sefidrood between Haraz Sefid and, Hraz- Gharehsou, Nagorno Sv- Gorgan and Atrak in the basin of Aras no limits to the beach. Aras sub-basin is located in the North West and Iran, the second largest sub-basin of the Caspian Sea. Talysh-Anzali on the Caspian Sea basin West and the seventh largest sub-basin of the Caspian Sea. White basin is located in the South East of the Caspian Sea and the extent of the sub-basin of the Caspian Sea. Haraz located in the south Caspian Sea basin and the ninth largest sub-basin of the Caspian Sea. Gorgan is located in the South East of the Caspian Sea basin and the fourth largest sub-basin of the Caspian Sea. In these areas, about 28 percent of the total fish production in the northern waters of aquatic allocated.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Environmental ; Ecological ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 58pp.
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  • 6
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    Investigation on feasibility polyculture of Litopenaeus vannamei with Mugil cephalus in earthen shrimp ponds (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25324 | 18721 | 2018-09-12 09:56:53 | 25324 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted in order to optimizing of the biological condition and enhancing of the harvest efficiency for cultured shrimps of Guater site. Experimental design was consisted of three treatments and each treatment with three replications (totally 9 ponds with 600 m^2 area for each pond). After preparing and watering of ponds, the ponds was stocked with shrimp post larves in a density of 0.007±0.001 g (or 20 numbers per m^2) per m^2. After 35 days, the fingerlings of gray mullet were released to shrimp ponds in densities of 0/100 m^2 (T1/), 2/100 m^2 (T2) and 4/100 m^2 (T3). During experiment, the physicochemical parameters of water (temperature, O_2, pH, water transparency and salinity) were measured daily for two times (morning and afternoon). Also, the nitrate, nitrite, ammonia, phosphate and silicate concentrations and BOD5 as well as chlorophyll (a), phytoplanktons and zooplanktons were measured every 15 days one time. To determine the organic values of the bottom sediment of the ponds, monthly sampling was conducted. Health status of shrimps was investigated monthly too. Growth rate, mean weight, survival value, Food conversion ratios (FCR) and total shrimp harvest (Kg) were measured after 107 days rearing in ponds. ANOVA analysis showed significant differences between treatments. The highest (212 Kg, 3533 Kg; weight mean was18.4 g for each shrimp) and lowest (187 Kg, 3116 Kg; weight mean was16.23 g for each shrimp) of harvested shrimps were yielded in T3 and T1 respectively. There was not significant differences between treatments in terms of survival rate (P〉0.05). After 107 days rearing, the highest (1.27 0.2) and lowest (1.2 0.1) of FCR were observed in T_3 and T_1 respectively. Although, there were no significant differences between T_2 and T_3 in ammonia, O_2, Total organic material, pH and BOD5, but, T_2 and T_3 had significant differences with T_1 in these parameters. In this study, 27 genus of phytoplanktons belonged to Diatoms (Bacillariophyceae), blue-green algal (Cyanophyceae) and dinoflagellates (Dinophyceae) were identified. Diatoms with 20 genus had more abundance than dinoflagellates (6 genus) and blue-green algal (1 genus). Also, 7 orders of zooplanktons including copepod, mollusks, nauplius of crustacean and rhizopoda were identified. Health investigation of T1 (without shrimp) showed more pathogenic pollution (parasites and bacteria) than in treatments with shrimp. In this regard, among bacteria, the Vibrio genus (V.Alginoliticus and V.Fluvialis) had more abundance and among parasites zoothamnium sp and Epistylis sp were identified which more abundance was for zoothamnium sp. In conclusion, our results concluded that mixed culturing of white shrimp and grey mullet in optimum densities is possible and is caused more production of shrimp.
    Keywords: Aquaculture ; Iran ; Chabahar ; Guater ; Litopenaeus vannamei ; Mugil cephalus ; Mixed culturing ; Polyculture ; Earthen ponds ; Shrimp ; Fingerlings ; Gray mullet ; Temperature ; O2 ; pH ; Water transparency ; Salinity ; Chlorophyll a ; Phytoplanktons ; Zooplanktons ; ANOVA ; Diatoms ; Bacillariophyceae ; Blue-green algae ; Cyanophyceae ; Copepod ; Investigation
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 92
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  • 7
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    Potential estimation and exploitation of large pelagics in the Persian Gulf and Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25137 | 18721 | 2018-08-26 16:54:02 | 25137 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In order to come up with the responsible fishing pattern, there was a need to identify some of the biological characteristics and population dynamic parameters of yellowfin tuna, skipjack and longtail tuna in the Persian Gulf and Oman Sea. Occurrence of empty stomach was high in all the specimens obtained from the gill net fisheries. Purple back flying squid was the most dominant prey species observed in the yellowfin tuna study (61% in males and 57% in females). The length of maturity (Lm50%) for yellowfin tuna was estimated 76 cm, 62.5 cm skipjack and 62.5 cm longtail tuna. Length range of skipjack was from 31-100 cm and bony fishes were the most dominant prey species observed in the skipjack. The monthly gonad somatic index was driven higher values after June which could be indicated as spawning period. The catch per unit of effort of three purse seiners (Azadegan 1, 2, 3) was compared in 1998- 2000. The species composition was 47% yellowfin tuna, 51% long tail tuna and 2% skipjack.
    Keywords: Biology ; Iran ; Persian Gulf ; Oman Sea ; Pelagics ; Biological characteristics ; Population ; Yellowfin tuna ; Skipjack ; Longtail tuna ; Specimens ; Gill Net ; Fisheries ; Purple back flying squid ; Species ; Maturity ; Length ; Gonad Somatic Index ; Spawning ; Estimation ; Potential
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 150
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  • 8
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    Production yield of the white-leg shrimp, Litopenaeus vannamei (Boone, 1931) culture in brackish water of Yazd Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25152 | 18721 | 2018-08-26 17:01:53 | 25152 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This survey is one of the researches of Investigation on feasibility of introduction of Litopenaeus vannamei in shrimp culture industry of Iran project. The aim of this survey was study about probability of adaptation of the white-leg shrimp, L. vannamei with brackish groundwater for culture at central Iran. 120/000 postlarvae (PL7&15) were stocked in four 0.15ha earthponds (17 & 23 N/m^2), in July 2005. Culture continued for about four months. Physicochemical and biological factors were studied. Shrimps were fed with L. vannamei commercial food. Results showed low survival (19.2%) and growth (2-2.5gr mean body weight while capture). Limnological factors may be the most important agent for unfavorable culture efficiency at based on the results of measurements. Concentration of K^+ (40mg/l), Ca^+2 (370- 472mg/l), Mg^+2 (340-407mg/l), Na^+ (3450mg/l), and their proportions; Fe^+2&+3 (0.18-1.17mg/l), Zn^+2 (0.072mg/l), nitrogenous compounds especially NH_3 (3.22mg/l), water hardness (2350-2870mg/l), different heavy metals; season of stocking and daily thermal periods (2.5-12°C with 8°C mode) are probably the most essential factors effecting production yield of L. vannamei, mainly because of underground origin of the water. Also, the structure of ponds and drainages, presence of invasive water plants and insects may affect survival and growth, as well.
    Keywords: Aquaculture ; Iran ; Bafgh ; Litopenaeus vannamei ; culture ; Brackish water
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 77
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  • 9
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    Investigation of the influence of different level of plant protein (30, 50 and 70 percent) in Litopenaeus vannamei shrimp diet, with 38 percent protein (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25160 | 18721 | 2018-08-26 17:37:21 | 25160 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The influence of different percent’s of plant protein (30, 50 and 70) in the diet of white leg shrimp (Litopenaeus vannamei) with 38 percent protein, in comparison with a commercial shrimp diet (Fenneropenaeus indicus) with 39 percent protein (contain20 percent plant protein) was studied. Initial weight of shrimp was 10±1 gram. The average increase of shrimp weight in the end of culture period in experimental treatment 1 (contain 30 percent plant protein and 70 percent animal protein), 5.89±0.06 gram, experimental treatment 2 (contain 50 percent plant protein and 50 percent animal protein), 6.22±0.25 gram, experimental treatment 3 (contain 70 percent plant protein and 30 percent animal protein) 6/19±0/24 gram and in the control treatment (contain 20 percent plant protein and 80 percent animal protein) 6/42±0/40 were measured. Generally in the study of influence of experimental diets and control diet on the growth rate(GR), food conversion rate (FCR), protein efficiency ratio (PER), specific growth rate (SGR), average daily gain (ADG), demonstrate that, mentioned parameters in the control treatment is better than experimental treatments. But no significant difference measured between them (p〉0/05). Also results showed that, application of diets contain 50 percent of plant protein (with 22 percent soybean meal), and 70 percent of plant protein (with 72 percent soybean meal), can decrease costs of diet preparation and therefore shrimp production.
    Keywords: Aquaculture ; Iran ; Bushehr Province ; Plant protein ; Litopenaeus vannamei ; Diets ; Growth indexes ; Shrimp ; Litopenaeus vannamei ; Fenneropenaeus indicus ; Growth Rate ; Protein ; Investigation ; Influence
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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    Format: 37
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  • 10
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    Research on determining of mesh size standard for beach seine fishery cooperatives to boost sustainable bony-fish fishery in southern Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25169 | 18721 | 2018-08-26 17:43:57 | 25169 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Bony fish stocks are being legally utilized by 134 fishing cooperatives in the Iranian side of the Caspian Sea mainly through beach seine. This fishing method has been invariantly used over the past. Fifty years with actually no alteration or technical modifications in the fishing nets despite the substantial changes in the quality & quantity of bony fish resources. Based on the data obtained from the stock assessment project for bony fish, the amount of premature or young fish (substandard size) caught during the past decade has been far greater than those of authorized fish size and even the figures for certain species suggest heavy over fishing to such an extent that in the case of frisii kutum, there has been a reduction by 50% in the overall kutum landings. Thus in order to modify the technical design of the fishing with a view to alleviate the catch of non-standard fish and whereby prevent over fishing by beach seine, it seems imperative therefore to launch a biometric study on bony fish stocks particularly the two intended fish species namely Rutilus frisii kutum and mullet which would involve identification of their standard weight and length using pertinent mathematical equations as well as determining proper mesh size of the code-end and other parts of the nets & consequently the H. R, d/a coefficients. The operations related to project were carried out in the "Inland Aquaculture Research Institute" net mating plant and beach seine site in Anzali during 2005-7 which aimed at designing and constructing standardized beach seines and comparing the fishing performance & yields with those of ordinary beach seine nets under equal conditions with a ratio of 3:1. The results concerning the quality and quantity of fish caught during a whole fishing cycle were recorded in the related data forms. The statistical analysis consisting the comparison of the quality of fishing performance in both the experimental and control beach seine nets was made using T. student and excel, spss 12 software packages. The results indicated that the reduction in the amount of non-standard fish caught in standardized beach seine net (the experimental net) was meaningfully different from that of the ordinary (control) net showing the superior fishing performance of the former. The catch level of non-standard R.frisii kutum decreased from 67.1% in the control beach seine net down to 7.1% in the standardized beach seine net and these figures for mullet were 29.98% and 1.1% respectively. Based on the results obtained and considering the apparent superiority of the experimental net in catching greater number of mature fish and less number of premature or non-standard sized fish, the use of this modified beach seine net can be proposed to Iranian fisheries organization as a viable alternative to the traditional beach seine nets.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Beach seine net ; Rutilus frisii kutum ; Mullet ; Standard sized fish ; Non-standard sized fish ; Bony fish ; Fishing ; Stock assessment ; R.frisii kutum
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 84
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