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  • Articles  (17)
  • Iran  (17)
  • 1
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    The monitoring of hydrology and hydrobiology stydies of the Persian Gulf in the Bushehr region (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25333 | 18721 | 2018-09-12 09:59:44 | 25333 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study has been carried out in waters of Bushehr province in the Persian Gulf covering Nayband bay to Bahregansar between 26° 45 N to 30° 00 N and 49° 45 E to 52° 45 E, 15 main and 5 sub- stations, by R/V Ferdows 1 in winter 2004, summer 2004 and winter 2005. The physico - chemical parameters, nutrients (silicate, phosphate, nitrate and nitrite), phyto, zooplanktons, sediments and macrobenthoses were collected from water layers and sea bottom, and then analysed. The parameters were compared and evaluated with the results of the previous work, conducted in the same area. Termocline, halocline, oxycline and picnocline layers were formed in summer. These clins disappeared due to water column mixing in winter. The values of temperature, conductivity and pH in summer were higher than those of in winter, while the salinity and density values of surface and subsurface layers in winter were higher than those of in summer. The temperature and conductivity have been decreased from surface to depth, from coastal rigions to offshore and from southern waters to northwern waters, while salinity, density and turbidity have been increased. The dissolved oxygen is decreased by increasing the values of temperature, salinity and depth and it is observed that D.O. has increased in correlation with chlorophyl a in mean and subsurface layers. The pH was rather decreased from surface to depth while turbidity was increased. Orthosilicate (Si_SiO44), nitrate (N_NO3), and nitrite (N_NO2 ) concentration have increased from surface to depth while orthophostate (P_PO43) decreased. Among the phytoplanktons, Dinophycea had most abundance in winter 2004 and Diatoms had most abundance, variety and distribution in summer 2004 and winter 2005. Among the zooplanktons, Copeopda had most abundance, variety and distribution. The intensity of phytoplanktons in summer was more than those in winter; it decreased from surface to depth and from coastal rigions to offshore, at first increased and then gradually decreases. Intensity of zooplanktons in summer was more than those in winter and decreased from surface layers to depth and from coastal waters to offshore. The abundance of benthoses in summer was more than that in winter while their biomass in winter was more than that in summer. The abundance decreased from southern to northwern waters, but the rate of decrease in biomass was more than that of abundance. The mainly texture of sediments was loamy or muddy and the grain size in southeastern and northwestern areas were coarser than those in middle area. Compared with the previous study, the trend of physico chemical, silicate, nitrate and nitrite were the same but in spite of the past, the values of pH in summer were more than those in winter and also phosphate concentration had been decreased frome surface layer to depth. The overall trends of phyto and zooplanktons densities are almost similar to previous observation, but cyanophyceae significantly decreased, in comparison with spring and summer abundance. It is also observed that the zooplanktons average density has been in reverse order compared to previous observations. Average concentration of phosphate in the entire region was seven times more than that of the former study and its maximum value has rised more than 26 times in the petroleum and gas industries areas. On the other hand, the abundance and diversity of phyto and zooplanktons and also the ratio of biomass to abundance of benthoses were decreased.
    Keywords: Ecology ; Iran ; Persian Gulf ; Bushehr Region ; Nayband ; Bahregansar ; Hydrology ; Hydrobiology ; Nutrients ; Phytoplankton ; Zooplankton ; Sediments ; Macrobenthose ; Temperature ; Dissolved oxygen ; Chlorophyll a ; pH ; Diatoms ; Copeopda ; Depth ; Monitoring
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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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
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  • 3
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    Biomass estimation, opening and closure of Shrimp (Penaeus semisulcatus) fishery in Bushehr waters (Persian Gulf) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25206 | 18721 | 2018-09-04 08:43:13 | 25206 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: From June 2004 to March 2006, a survey in Iran waters (Bushehr province) has completed. Sampling was accomplished in two area, north and south. In this period 15 cruises achieved in summer and 3 cruises in autumn and winter. In each cruise of north and south area 18 and 30 stations were sampled respectively. Stations row on three depth stratums that is, below 10 m, 10-20 m, and 20-30 m in total area from Bahrekan to Motaf. Some Biological parameters such as sex stages, sex ratio, mean total length, species composition were measured. Duration of shrimp fishing season in years 2004, 2005 and 2006 were 40, 44 and 40 days in summer respectively. In June and august the Catch per Unit Effort (CPUE) in south was more than northern area. CPUE increases in north area especially at the end of summer during fishing season gradually. Computing on Biomass estimation resulted 674, 1024 and 873 ton in years 2004, 2005 and 2006 respectively for all shrimp species (usually tiger shrimp, white shrimp and other). Total commercial landing of shrimp catch in above years were 1602, 1597 and 1110 ton respectively. Percentage of tiger shrimp in commercial landing in above years was 77, 75 and 84 respectively. We found that the least mean length of tiger shrimp was observed in southern area especially from Motaf to Rodmond stations. The schools of prawn penaeus semisulcatus enter to Bushehr waters from southern area that is Motaf region. Other than Motaf; Nakhilu, Rase khan and Rod-mond show same characteristics. Also in this region, density of shrimp increases with depth in most summer cruises. The result from analyses of gonad maturation studies shows the adult and mature females (stages III and IV) of P. semisulcatus accumulate in northern area at the end of autumn. This stock catches in autumn by illegal fishing.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Bushehr province ; Biomass ; Shrimp ; Penaeus semisulcatus ; Fishery ; Green tiger prawn ; Opening season ; Closure season ; Survey ; Sampling ; Sex ratio ; Species ; CPUE ; Illegal fishing ; Parameters
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    Determination of biotechniqe and bionormative of breeding and culturing of Penaeus merguiensis de Man in Bushehr Area (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25208 | 18721 | 2018-09-05 16:18:49 | 25208 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: To introduce the native commercial shrimp species to aquaculture industry, the Iranian Fisheries Research Organization conducted a project to investigate the possibility of reproduction and cultivation of the banana shrimp (Penaeus merguensis). The present work has been carried out from 21st March 2001 in two phase, reproduction and cultivation, in Iran Shrimp Research Center. The main objectives of this study was to find the possibility of reproduction and cultivation of banana shrimp with emphasis on its cost and benefit and to find if this species could be introduced to aquaculture industry in Iran. In this work, 42 brood stocks of banana shrimp caught in Jask waters and were transported to Bushehr. The shrimps were reproduced in aquaculture research station, and then cultivated in 0.4 ha ponds in Heleh region. Most of the broodstocks perished, due to long distance of Jask from Bushehr province, or had problem in hatching. Finally 8 of broodstock shrimps spawned. In 3 cases, the reared naplii larva suffered high mortality, but the other 5 spawner’s bread successfully. The post larvae were introduced to the shrimp ponds. The primary stocking was 360,000 larvae, introduced to each of two 4 m 3 tanks. The survival in both tanks for mysis stage was 83% but for PL stages, the survival was 5% for Tank 1 due to disease outbreak (until PL 24), and 62% for Tank 2. On 10 th June 2001 the PL 24 were stocked into the ponds but unfortunately due to adaptation problem, all of the shrimps perished. It seems that banana shrimp couldn’t to be adapted to the pond condition in Heleh region. On the basis of the results, the reproduction of the banana shrimps is achievable, but broodstocks needs to be transferred to reproduction areas as soon as possible to reduce stress on the shrimps. Our finding shows that the optimum conditions of salinity and temperature for growth of the reared banana shrimp in Heleh region is 33ppt and 30 °C, respectively.
    Keywords: Aquaculture ; Iran ; Persian Gulf ; Banana shrimp ; Aquaculture ; Reproduction ; Penaeus merguensis
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    Study of the aquaculture of Pacific white legged prawn and comparison of its economical efficiency with Indian white prawn (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25207 | 18721 | 2018-09-05 16:22:47 | 25207 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Increasing of biodiversity and reduction of production costs and alo increasing of shrimp production are the main elements of production security and continuation of aquaculture of shrimp in the country. The hypothesis of this study is made on the basis of aquaculture of pacific white legged prawn, litopenaeus vannamei, and that is economically better than Indian white prawn in Bushehr area. This study was carried out with the objectives of determination of bionormatives of pacific white legget prawn and yield estimation per square meter and has been compared with Indian white prawn. During 1384-85. In this study, the field operations were carried out after primary preparation and water enrichment with the juvenile prawn (pL 15) with 20 prawn per squar meter in the 3 ponds. During the study the phisico-chemical parameters such as water temperature, ocsysion, pH,two times per day , in the morning and evening and salinity , transpiration and depth water , only one time in a day were measured .The health of prawns and also sampling for the calculation of body weight were carried out in every 10 days . Feeding in the first month was randomly and after that was being continued based on the mean of the body weight. The results of this study have showed that the growth of this species is very fast so that during 90 days with the capacity of 20 prawns per squar , meter, it can be reached to 19.59 gr body weight with the growth rate of 0.217 gr . The mean of total production was 2737.5 kg per hectar with FCR=1. During this study the salinity from 33 ppt to 54 ppt, water temperature from 24.3°c to 35.2°c, occsysion from 2.4 to 11.89 mg/l , pH from 7.83 to 9.01 , transparency from 35 cm to 90 cm and water depth from 100cm to 145 cm were measured and recorded . In the second year, the comparison of growth rate of white legged prawn and Indian white prawn was carried out in the four ponds. The results of this study showed that during 110 days. White legged prawns was reached to average of body weight 14.66 gr and Indian white shrimp, reached to 10.75 gr. The economical assessment showed that white legged prawn has an economical advantage around 2.59 times during 110 days with the capacity of 35 prawns per hectar.
    Keywords: Aquaculture ; Iran ; Bushehr ; Western white legged shrimp ; Indian white shrimp ; Culture ; Bionormative ; Commercial production ; Aquaculture
    Repository Name: AquaDocs
    Type: monograph
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  • 6
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    Manufacture of artificial diet to feeding of western white shrimp (Litopenaeus vannamei) in larval stages and in comparison with import diet (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25252 | 18721 | 2018-09-07 06:41:06 | 25252 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: For the accomplish of project, nine treatments with three replicate in each treatment, used as follows. Control treatment: Feeding with natural foods (Chaetoceros sp and artemia nauplii) Treatment 1: Feeding with combination of inner artificial diet and natural foods. Treatment 2: Feeding with combination of imported artificial diet and natural foods. Treatment 3: feeding from zoea 1 to mysis 1 with chaetoceros sp and from mysis 1 to pl15 with inner artificial diet. Treatment 4: feeding from zoea 1 to mysis 1 with chaetoceros sp and from mysis 1 to pl15 with imported artificial diet. Treatment 5: feeding from zoea 1 to pl15 with project artificial diet. Treatment 6: feeding from zoea 1 to pl15 with imported artificial diet. Treatment 7: Feeding in zoeal stages with chaetoceros sp and from mysis 1 to pl15 with chaetoceros sp+artemia nauplii+ imported artificial diet. Treatment 8: Feeding in zoeal stages with chaetoceros sp and from mysis 1 to pl15 with chaetoceros sp+artemia nauplii+ project artificial diet. Larvae stocked at a density of 100 nauplii/ L-1 (1000 nauplii in each tank each tank), at the beginning of culture period The results showed that, in treatments 1, 2, 7 and 8 from zoea 1 to pl15, growth indexes were suitable and noticible, and in most treatment better than control treatment. Survival percent, in pl15 in treatment 1, 2, 7 and 8 was more than control treatment, and differention between treatment 1, 2 and 8 in comparision with control treatment was statictically significant (p〈0.05). Survival percent in treatments 5 and 6 from stages zoea 1 to late zoea 3 stage, in comparision with other treatments were lesser, but without statictically significant (p〉0.05). But thereafter, significantly decresed. In treatments 3 and 4 from zoea 1 to late mysis 3 stage, survival percent in comparision with other treatments were suitable, and thereafter, significantly decreased, and with statictically significant with other treatments (p〈0.05). The means of final weight in treatments 1, 3 and 8 was more than control treatment, but without statictically significant (p〉0.05), but in treatment 8, was more than other treatments. The mean of final length between treatments 1, 2, 6, 7, 8 and in comparision with control treatment, were not statistically significant (p〉0.05). But in treatment 2, more than control treatment, and in other treatments less than control treatment.
    Keywords: Aquaculture ; Iran ; Larvae culture ; Litopenaeus vannamei ; Imported artificial diet ; Inner microbound artificialdiet ; Feeding ; White shrimp ; Larval stage ; Chaetoceros Sp. ; Artemia nauplii ; Zoea ; Mysis ; Diet
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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    Effects of light regimes on growth and survival of Penaeus semisuleatus (2021)
    In:  http://aquaticcommons.org/id/eprint/24280 | 18721 | 2018-08-04 06:40:08 | 24280 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: We investigated the possible effects of light regimes on growth and survival rate of juvenile shrimp Penaeus semisuicants cultured in Bushehr Province, southern Iran. Five light regimes each with three replications were applied for 30 days. The treatments were 24 1 0, 18 / 6, 12 1 12, 6 1 18 and 0 124 hours of light and darkness. We found that the treatment 12 7 12 hours of light and darkness was better than 18 1 6 and significantly superior to other treatments (P〈0.05). The lowest growth rate was seen in the treatment 24 / 0 (P〈0.001 ). We did not find a significant difference in the survival rate of the shrimps cultured in the light and darkness treatments (P〈0.05).
    Keywords: Aquaculture ; Biology ; Growth ; Survival rate ; Penaeus semisulcatus ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
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  • 8
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    Effect of different dietary levels of plant protein on growth indexes of white Leg shrimp (2021)
    In:  http://aquaticcommons.org/id/eprint/23717 | 18721 | 2018-07-20 08:22:49 | 23717 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: The influence of different dietary levels of plant protein (30, 50 and 70%) on growth indices of White Leg Shrimp (Litopenaeus vannamei) fed with an original 38 percent protein was assessed and compared with that of the commercial shrimp diet. The average weight gain at the end of the culture period in treatment 1 (30% plant protein and 70% animal protein), was 5.89 plus or minus 0.06 grams, for treatment 2 (50% plant protein and 50% animal protein), was 6.22 plus or minus 0.25 grams, for treatment 3 (70% plant protein and 30% animal protein), was 6.19 plus or minus 0.24 grams and for the control treatment (20% plant protein and 80% animal protein), was 6.42 plus or minus 0.40 grams. Our study of the influence of experimental and control diets on growth indices including growth rate (GR), food conversion ratio (FCR), protein efficiency ratio (PER), specific growth rate (SGR), and average daily gain (ADG), demonstrated that the indices were better in the control compared to the treatments. No significant difference was found among the treatments and between the treatments and the control for the indices (P〉0.05). The percent of net protein utilization (NPU) in treatment 1 was significantly more than other treatments (P〈0.05). We also found that the application of diets containing 50% plant protein (with 20% soybean meal) and 70% plant protein (with 41.72% soybean meal) can decrease diet costs. Cost of one kilogram of pellet in treatments 1, 2, 3 were 83.3%, 68.3% and 53.3% lower than the control diet respectively. Decrease of cost in treatment 2 and 3, in comparison to control in terms of lowering shrimp production cost is very important.
    Keywords: Aquaculture ; Growth ; Weight ; Protein deficiency ; Dietary deficiencies ; Feeding experiments ; Feed composition ; Marine ; Shrimp culture ; Litopenaeus vannamei ; Bushehr Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
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    Format: 79-88
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  • 9
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    Determination of LC50 of copper in Litopenaeus vannamei (2021)
    In:  http://aquaticcommons.org/id/eprint/24749 | 18721 | 2018-08-05 16:25:49 | 24749 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: We determined the LC50 of copper (as CUSO_4) and it's Maximum Allowable Concentration (MAC) for Litopenaeus vannamei. The study was performed in 2003 for which bioassays were used for acute toxicity tests in a period of 96 hours during which water parameters such as water temperature, pH, dissolved oxygen, hardness, alkalinity were also measured. Ten treatments and three replicates for each treatment were used. A LC50 of 86.71, 27.28, 7.98 and 3.90mg/1 and also Maximum Allowable Concentration of 8.671, 2.728, 0.798 and 0.390mg/1 were determined at 24, 48, 72 and 96 hours post exposure. Results showed that L. vannamei is relatively resistant to copper. Hence, short period application of copper to white shrimp farms for controlling algal bloom is judged harmless to the fish.
    Keywords: Biology ; Pollution ; LC50 ; Litopenaeus vannamei ; Copper Sulphate ; Bushehr ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
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    Format: 103-110
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  • 10
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    Investigating the application of spawning shelter of cattle fish for its enhancement of resources (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25318 | 18721 | 2018-09-08 16:45:23 | 25318 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this project, four types of structures, of 40 number was investigated. In a six month period, the structures were inspected 13 times. The total weight and number of eggs hatched on the structures were estimated to be 214.1kg and 94944 respectively. The weight and number of eggs settled on trap types were 141.9 and 60982 respectively, whereas, The eggs on cubical structures were estimated 56.7kg and 27088 ,on pyramid structures 7.9 and 3941 and then also were 6.9 kg and 3280 eggs on cylindrical structures respectively. It is also estimated that 358 eggs were settled on The connecting line weighting 0.5kg. In this report four types of structures was compared. As a result, the trap, cubical, pyramid and cylindrical structures had contributed to the settelment of 66, 27, 4 and 3 percent of eggs in weight. While 64, 29, 4 and 3 percent of eggs in number was settled on these structures respectively. Thus it is concluded that the trap structures fallowed by cubical ones had acted more effectively relative to other two. If based on the results of other studies, we assume 80% survival rate of eggs and average weight of 1.2 kg of survival growth cuttlefish, then it can be calculated that 160 structures can contribute to 91 tons increase in cuttlefish stock in one area of 4 to 5 acre. It is obvious that by planning an annual increase of the structures, it is possible to attract more spawners to spawn and produce more larvae. Moreover,The old structures will be covered by corals and barnacles and become Amore stalie and attractive spawning ground for cuttlefish.
    Keywords: Aquaculture ; Iran ; Spawning ; Cuttlefish ; Structures ; Trap ; Growth ; Produce ; Types ; Weight ; Eggs ; Survival rate
    Repository Name: AquaDocs
    Type: monograph
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    Format: 66
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