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  • 1
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    Experiments on polyculture of pike, Esox lucius,with carps (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Goal of project implementation was survey of biological roles of Northern pike, Esox lucius, in decreasing of Coarse fish and other un economics organisms in carps ponds and also increasing of final crops in hectare and determination of Suitable ration of pike in ponds. This project implemented by 5 treatment with 3 replicates for every ones in 2 years . The pike density was 200, 350, 500 and 650 fish individuals per hectare for 1 , 2 , 3 and 4 treatment , Respectively, and fifth treatment was without pike. The treatments of 1 and 3 conducted in first year and other in second year of test period. At first, about 26 brooders Caught from Anzali Lagoon, and reproduced by artificial and semi - natural methoods in Sefidroud Pisheries Research Station in 12–14 °c temperature. Produced larvae reared in earthen ponds and fries reached to weight of 10 -12 g after 45 days. Mean weight, length and survival rates of fish was 12.27 and 32.5 g , 11.44 and 15.83 cm , and 40 and 21% after 45 and 60 days , respectively . The carp density in ponds was 3500 fish individualsper hectar and stocking rates were 55 % silver carp, 20 % common carp , 10 % bighead carp and 15 % grass carp . In throughout of the experiment period, physico – chemical factors measured and plankton ( phyto and zoo) , benthos , un wanted fish and other organisms investigated . The biomass of unwanted fishes reduced to 76/81 and 60/6 % in first and second year of experiments respectively. The results showed that Esox lucius had effect in increasing of objective fish produce about 17.9 % and 3.9 % in first and second period of project implementation respectively . The average of fish produce in pond unit ( 2400 m2 )was 842 kg ( 3508 kg/ha ), 825 kg ( 3439 kg/ha ) and 776 kg ( 3232 kg/ha ) in first , second and control treatments first year of test period , and also in second year was 865 kg ( 3603 kg/ha ), 877 kg ( 3652 kg/ha) and 848 kg ( 3531 kg/ha) in second , fourth and control treatments , respectively . A significant different found in final weight mean of common carp between treatments and Control ponds (P 〈0/05), as the weight of common carp in treatments ponds was 220 % in first year and 191 % in second year more than control pond. In end of the trial, the mean weight of Esox lucius was 265 ± 74, 276 ± 104, 159 ± 33 and 265 ± 89 g in 1, 2, 3 and 4 treatment, respectively. Survival rate of Northern pike in 1 to 4 treatment was 43.8, 55.2, 40 and 35.6 %, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Biological ; Polyculture ; Pike ; Esox lucius ; Carp ; Survey ; Organisms ; Density ; Temperature ; Larvae ; Earthen ponds ; Plankton ; Survival rate
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 132pp.
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  • 2
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    The study and feasibility of Cheshmeh-Ali River and down stream area of Shahid Shah-Charaghy Dam in Damghan for aquaculture development (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: This research was conducted to finding of Cheshmeh-Ali and Shahcheraghi-Dam downstream areas potential for developing of aquaculture industry. The present study was conducted based on available information and data from monthly and seasonally sampling including geographical area, margin lands and fluctuations of river water, seasonal climatic changes view point of rainfall, temperature, wet, evaporation, wind velocity, sunshine hours, frost and also chemical and physical parameters of water including temperature, alkalinity, total hardness, chloride, calcium, magnesium, sodium, potassium, organic phosphorous and nitrogen, suspended solids, turbidity, water flow and flood conditions, and in addition phytoplankton and zooplankton communities, macrobenthic invertebrates, fishes, aquatic plants, amphibians, reptiles, birds. Results showed that the upstream and downstream regions of Shahcheraghi dam are not suitable for warm water aquaculture in earthen ponds. But view point of cold-water aquaculture, particularly trout, there are some good situations. Also it can be suggested different culture systems including of race way, octagonal concrete ponds, semi-circulation and circulation methods. But, due to water restrictions in the area, semi-circulation and circulation system is preferred. In ideal conditions can be produced about 1,600 tones of trout, if all the capacity of this area be used for aquaculture. Otherwise, in limited circumstances view point of exploitation possibility of the water, only about 700 tons can be produced. In addition, there were appropriate facilities in spring area of Cheshmehali for tourism industry, that it can be considered as priorities for economic development in the region. Due to the low sensitivity of the ecologically conditions, native or exotic aquatic species rearing in indoor methods can be recommended.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Chemical ; Physical ; Site selection ; Aquaculture capacity ; Sampling ; Temperature ; Turbidity ; Culture
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 71pp.
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  • 3
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    Experiments on polyculture of pike, Esox lucius, with carps (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25235 | 18721 | 2018-09-07 06:41:04 | 25235 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Goal of project implementation was survey of biological roles of Northern pike, Esox lucius, in decreasing of Coarse fish and other un economics organisms in carps ponds and also increasing of final crops in hectare and determination of Suitable ration of pike in ponds. This project implemented by 5 treatment with 3 replicates for every ones in 2 years. The pike density was 200, 350, 500 and 650 fish individuals per hectare for 1, 2, 3 and 4 treatment, respectively, and fifth treatment was without pike. The treatments of 1 and 3 conducted in first year and other in second year of test period. At first, about 26 brooders Caught from Anzali Lagoon, and reproduced by artificial and semi - natural methods in Sefidroud Fisheries Research Station in 12–14 °c temperature. Produced larvae reared in earthen ponds and fries reached to weight of 10 -12 g after 45 days. Mean weight, length and survival rates of fish was 12.27 and 32.5 g, 11.44 and 15.83 cm, and 40 and 21% after 45 and 60 days, respectively. The carp density in ponds was 3500 fish individuals per hectare and stocking rates were 55 % silver carp, 20 % common carp, 10 % bighead carp and 15 % grass carp. In throughout of the experiment period, physico– chemical factors measured and plankton (phyto and zoo), benthos, un wanted fish and other organisms investigated. The biomass of unwanted fishes reduced to 76/81 and 60/6 % in first and second year of experiments respectively. The results showed that Esox lucius had effect in increasing of objective fish produce about 17.9 % and 3.9 % in first and second period of project implementation respectively. The average of fish produce in pond unit (2400 m^2)was 842 kg (3508 kg/ha ), 825 kg (3439 kg/ha) and 776 kg (3232 kg/ha) in first , second and control treatments first year of test period , and also in second year was 865 kg (3603 kg/ha), 877 kg (3652 kg/ha) and 848 kg (3531 kg/ha) in second , fourth and control treatments , respectively. A significant different found in final weight mean of common carp between treatments and Control ponds (P 〈0/05), as the weight of common carp in treatments ponds was 220 % in first year and 191 % in second year more than control pond. In end of the trial, the mean weight of Esox lucius was 265 ± 74, 276 ± 104, 159 ± 33 and 265 ± 89 g in 1, 2, 3 and 4 treatment, respectively. Survival rate of Northern pike in 1 to 4 treatment was 43.8, 55.2, 40 and 35.6 %, respectively.
    Keywords: Aquaculture ; Iran ; Sefidroud River ; Polyculture ; Pike ; Esox lucius ; Carp ; Survey ; Organisms ; Density ; Temperature ; Larvae ; Earthen ponds ; Plankton ; Survival rate
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 132
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  • 4
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    The study and feasibility of Cheshmeh-Ali River and down stream area of Shahid Shah-Charaghy Dam in Damghan for aquaculture development (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25507 | 18721 | 2018-10-05 07:40:08 | 25507 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This research was conducted to finding of Cheshmeh-Ali and Shahcheraghi-Dam downstream areas potential for developing of aquaculture industry. The present study was conducted based on available information and data from monthly and seasonally sampling including geographical area, margin lands and fluctuations of river water, seasonal climatic changes view point of rainfall, temperature, wet, evaporation, wind velocity, sunshine hours, frost and also chemical and physical parameters of water including temperature, alkalinity, total hardness, chloride, calcium, magnesium, sodium, potassium, organic phosphorous and nitrogen, suspended solids, turbidity, water flow and flood conditions, and in addition phytoplankton and zooplankton communities, macrobenthic invertebrates, fishes, aquatic plants, amphibians, reptiles, birds. Results showed that the upstream and downstream regions of Shahcheraghi dam are not suitable for warm water aquaculture in earthen ponds. But view point of cold-water aquaculture, particularly trout, there are some good situations. Also it can be suggested different culture systems including of race way, octagonal concrete ponds, semi-circulation and circulation methods. But, due to water restrictions in the area, semi-circulation and circulation system is preferred. In ideal conditions can be produced about 1,600 tones of trout, if all the capacity of this area be used for aquaculture. Otherwise, in limited circumstances view point of exploitation possibility of the water, only about 700 tons can be produced. In addition, there were appropriate facilities in spring area of Cheshmehali for tourism industry, that it can be considered as priorities for economic development in the region. Due to the low sensitivity of the ecologically conditions, native or exotic aquatic species rearing in indoor methods can be recommended.
    Keywords: Aquaculture ; Iran ; Semnan Province ; Damghan ; Shahcheraghi Dam ; Cheshmeh-Ali River ; Site selection ; Aquaculture capacity ; Sampling ; Temperature ; Turbidity ; Culture
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 71
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  • 5
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    Studying the impacts of the Rainbow Trout farms effluents on Sabzkooh River in Charmahal-va - Bakhtiari Province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Sabzkooh in Ardal and Gandoman region in Charmahal province with annual production of 1300 metric tons of rainbow trout, is one of the most important rivers in the province. The effects of fish farms effluent on the river water quality and the possibilities to develop or limit the existing ones were studied. Flora and fauna of the river including Phyto and zooplankton, macroinvertebrates and fishes were sampled and studied. Moreover some key physico-chemical water quality parameters, concentrations of stable pollutants (heavy metals: Zn, Cu, Fe, Pb, Cd and agricultural poisons (herbicides or pesticides: DDT, Lindane, Alderine and indosulfate) and Coliform contamination were also measured. All phytoplankton genus were of tow taxa, Cianophyta and Chrysophyta and zooplankton fauna belonged to Rotatoria, Protozoa and meroplanktonic chirinomids and nematodes. Four fish species from 3 families were identified of which rainbow trout had the highest relative frequency (94.6%).All the measured heavy metals including Zn, Cu, Fe, Pb, Cd and the agricultural poisons concentrations such as DDT, Lindane, Alderine and indosulfate were lower than the hazardous level suggested for the surface waters. According to the benthic macroinvertebrates populations study, stations at downstream (no. 6 and 7) which received the Chartakhteh and Rudarud farms effluent had least EPT richness and the hilsenhof family level biotic index at this locations was greater than 5.25, classifying them as having organic pollution. Even though measured key physico-chemical parameters such as nutrients (N and P compounds and BOD5) in the receiving stations and effluent water never exceed the maximum permitted range but in downstream stations these factors were very close to the range. One way analyze of variance (P 95%) for TN, TP, No2, NH4, BOD5, pH, PO4 and Ec revealed no significant differences between stations before and just after receiving the effluents, however these parameters in the effluents themselves significantly differ from upstream stations 1,2 and 3 proving relatively lower organic pollution and the potential for constructing new farms or expanding the existed ones in upstream region from Chartagh to Dehnoo. At downstream from Dehnoo to Rudarud and lower parts, dense trout farm effluents in addition with point and non point pollution (municipal, agricultural and other coming run off from the catchments area) had remarkable effects on the river water quality and as a result no farm construction or expansion is recommended. To avoid or reduce the existing farms effects on the river system there should be certainly some remediation actions carried out. Constructing sedimentation ponds before releasing the effluents, obeying the rule of water extracting, preventing fish escape, increasing feeding efficiency and controlling the lateral inlets from catchments area which are potentially pollutant, should be considered to improve the situation and prevent further environmental problems caused by fish farms effluent in these area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physico-chemical ; Agricultural ; Rainbow trout ; Effluent ; Pollution ; Fauna ; Phytoplankton ; Zooplankton ; Heavy metals ; Protozoa ; Lindane ; Alderine ; Indosulfate
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
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  • 6
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    Bio-ecological study of river estuaries in Guilan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Caspian Sea with brackish water is known as typical environment due to geo position, precious biota and the largest land-enclosed drainage area in the world. Macrobenthos were performed the main group of the Caspian Sea fauna. While they use as environmental bio-assessment, they have not completely studied in the Caspian Sea especially in estuaries environments. In this survey were studied eighteen river estuaries in Guilan province off Caspian sea southwest including Asrara, Chelevand, Lemir, Havigh, Shirabad, Khotbesara, Lisar, Karganroud, Navroud, Nokandekeh, Sefidrud, Heshmatrud, Langerud, Polerud and Chabokrud. The macro-invertebrate sampling was conducted seasonally at eight stations during autumn 2008 to autumn 2009. The macrobenthos organisms were identified as possible level in genus or species. The Shannon Wiener diversity and the Hilsenhoff biotic indices were used for evaluation of environmental quality. In this study, 69 genus identified that belong to 36 families and 16 orders. The most presentation of genus belongs to Chironomidae family with twenty six genus while others families were included forty three genus. The most average of macro-invertebrate abundance belong to order of Diptera with 35 %, subsequently the abundance of Amphipoda and Bivalvia orders occupied the second rank with 8.2 %. Orders Polychaeta, Oligochaeta and Cumacea had a low abundance during the study, however the Polychaeta showed a high abundance in some seasons and stations (up to 25%). The Plecoptera was rarely observed in some stations with high abundance. The Stenogammarus genus had the normally distribution during study, while Chironomidae genera as Eukifferiella and Cricotopus were measured in the high abundance during autumn 2008 to spring 2009. While Streblospio and Limnodrilus had the high presentation during winter and spring 2009, Cerastoderma sp. showed a high percentage in spring and summer 2009. The result of Shannon Wiener index values showed a significantly difference among regions for most seasons. There was also observed significantly difference for diversity values among stations in different seasons. According to Hilsenhoff biotic index for water quality classification; the most stations had good quality in spring 2009, while they were slightly and moderately good condition in winter 2009. The water quality of the Caspian Sea stations was in good condition as compared with the rivers estuary stations.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: River estuary ; Macrobenthos ; Diversity ; Bio-assessment ; Brackish Water ; Environmental quality ; Cricotopus ; Eukifferiella ; Chironomidae
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
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  • 7
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    The Density and distribution of phytoplankton in the Persian Gulf Martyrs Lake (Chitgar Tehran) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Cheetgar lake or Persian Gulf Martyrs' lake is an artificial lake in the North west of tehran is located in district 22 of tehran municipality.The lake covers an area of 130 hectares, which is located north of forest park Cheetgar. In south,to Tehran-Karaj highway, In north Hemmat expressway, from East to Azadegan expressway and west and from residential areas district 22 of tehran municipality is limited. Kan River from East and Vardavard of West cheetgar Lake crossing and kann river is the main source of water of the Cheetgar lake now. Plankton is one of the important factors related to water quality. In this context, understanding the biological and nonbiological lake and its ecological status of a useful tool for managing sustainable exploitation with an emphasis on water quality is maintained. This study focused on phytoplankton structure, a bioticlimiting factors in phytoplankton bloom at the 5 stations between 2013 and 2014 in the Chitgar Lake.according to profile Lake after visiting five stations in the lake water body determined that Different depths are sampled. Sampling of phytoplankton is done by using a liter Ruthner sampler in layers and deep level (of a cylindrical column) were taken.Than 4% formalin fixed samples and transferred to the laboratory for quantitative and qualitative study.In laboratory planktonic samples after determining the volume and mixture, were transferred by pipette to 5ml chambers and after sufficient time to sediment, were identified and counted by inverted microscope. This study identified 35 phytoplankton taxa comprised of diatoms (12 genus), chlorophytes (15 genus), cyanophytes (4 genus), dinoflagellates (2 genus) and chrysophytes (1 genus) in the lake. The finding showed, the diatom abundance dominate (average of 2060000 ± 230000 cells.l-1) in the Chitgar lake. The annual average phytoplankton abundance was calculated as 2550000 ± 304000, with the maximum value recorded in February 2013 (4400000 ± 450000 cell. l-1). The PCA analysis displayed, the diatoms Cyclotella sp., Achnanthes sp. and Chrysophte Dinobryon sp. were dominated in the study period. Based on CCA analyses, total nitrogen and water temperature were the significant parameters to increase cyanophytes and dinoflagellates abundance in the Chitgar lake. In overall, the lowest phytoplankton abundance recorded in the Chitgar Lake as compared with other lakes which is an meso-oligotrophic category with the latest trophy state lake. Thus, it is might be increased eutrophication trend due to no management and no aquatic control in this ecosystem.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Density ; Distribution ; Gulf Martyrs Lake ; Phytoplankton ; Meso-oligotrophic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 60pp.
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  • 8
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    Studying native fishes in Hamadan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Studying native fishes of Hamadan province have been done in 159 stations from 51 important water resources (wetland, reservoir, spring, river and qanat) using with electric tool, cast-net, seine and gill-net gears from July 2010 to Oct. 2011 and the main aims were species identifying and determining their distribution and abundance in the studied area. In the study, 33411 fish specimens are caught in 257 times of sampling and selected randomly about 8500 individual and laboratory works showed the fish belong to 37 species from 7 families. Cyprinidae with 25, Nemacheilidae with 6 and Sisoridae with 2 species had the most diversity and Cobitidae, Poeciliidae, Salmonidae and Mastacembelidae had only a representative. 31 fish species were native or endemic and 6 species were alien. Fish species existed in all rivers of Ghezelozan and Sirvan sub-basins but there were not any fish in 10 rivers of Ghara-Chai sub-basin and in 6 rivers of Gamasiab sub-basin, too. Also, it was observe 1-3 fish species in 15 rivers, 4-6 fish species in 10 rivers, 7-10 fish species in 5 rivers and more than 10 fish species in 4 main water resources and Gamasiab sub-basin with 32 fish species was the most diversified and Ghezelozan sub-basin with 2 fish species was the least diversified. There were any species to 4 (mostly 1 or 2) fish species in studied qanats in Ghara-Chai and Gamasiab rivers sub-basins. 23 fish species existed in a subbasin, 12 species in 2 sub-basin, Capoeta capoeta in 3 sub-basin and Squalius cephalus in all sub-basins of studied area. Alburnoides nicolausi,Capoeta aculeata and Alburnus mossulensis have had the most frequency. Studying fish abundance showed Oxynoemacheilus argyrogramma with 17.8%, Garra rufa with 12.3%, A. mossulensis with 12.1% and C. aculeata with 10.2 % of total number of caught fish specimens are dominant. S. cephalus, Capoeta damascina, C. aculeata, C. trutta, Chondrostoma regium and A. mossulensis have had sport fishing value but Acanthobrama marmid, Oxynoemacheilus kiabii, Oxynoemacheilus kermanshahensis, Turcinoemacheilus kosswigi, Alburnus caeruleus and Mastacembelus mastacembelus have biodiversity value for being endemic or having limited habitats in Iran.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Fish diversity ; Abundance ; Distribution ; Specimens ; Sampling ; Cyprinidae ; Nemacheilidae ; Sisoridae ; Cobitidae ; Poeciliidae ; Salmonidae ; Mastacembelidae ; Capoeta capoeta
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 130pp.
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  • 9
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    Study of Shovier and Mirzakhanlo dam reservoirs in Zanjan province in order to aquaculture activity (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Inland water aquaculture activity have been known as an important approach for protein production while reservoir lakes recognized to have a significant potential for this purpose. Zanjan province in Iran with several dam reservoirs is suitable for aquaculture development. This study was conducted on biotic and abiotic factors of two lakes Shovir and Mirzakhanlo in order to determine aquaculture potentially of reservoirs. This two lakes located on different climatic region; Shovir located in region of semi arid area with very cold weather in winter, while Mirzakhanlo is in semi humid area and warm weather characteristic. In this study the plankton, benthos and fishes were assessed and the 15 hydrochemical factors were measured in order to determine the fisheries potential for fish introduction or release. The results showed that the phytoplankton abundance of Mirzakhanlo varied between 1.6 to 45.2 million cell/l. with 32 identified genus. The zooplankton abundance varied between 48 to 632 n/l. and 22 identified genus. The abundance plankton in shovir varied between 1.350 to 34.2 million cell/l. and 240 to 4500 n/l. for phyto and zooplankton respectively. Macrobenthos biomass were 21.4 and 0.34 g/m2 in Shovir and Mirzakhanlo lakes respectively while Chironomidae and Tubificidae families were dominant groups. The lake sediment organic matter were 4.3 and 3.2 % respectively. In ichtiology survey identified 5 and 7 species in Mirzakhanlo and Shovir lakes respectively. The hydro-chemical results indicated no restriction for aquaculture activity and according to trophic model both lakes are recognized as meso-eutrophic and eutrophic. Despite of climatic restrictions, the potential for fish production was estimated about 321 and 151 kg/ha for Shovir and Mirzakhanlo lakes respectively that can be improved by using agricultural and the other native facilities.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Aquaculture ; Plankton ; Benthose ; Hydrochemical ; Phytoplankton ; Chironomidae ; Tubificidae ; Survey ; Meso-eutrophic ; Eutrophic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 76pp.
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  • 10
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    Comprehensive study on probability of controlling Caspian Sea invasive Ctenophora Activity 4: The laboratory study on probability of controlling Mnemiopsis leidyi by use of Beroe ovata (reproduction study of B. ovata in the Caspian Sea water) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In 1999 Mnemiopsis leidyi was introduced to the Caspian Sea from the Black Sea with ballast waters from the ships. The comprehensive study on probability of controlling Caspian Sea invasive Ctenophora planned after a remarkable of decreeing in Kilka fish catches stocks and fisheris community problems. This study focus on reproduction experiments of Beroe ovata as the best candidate for control of Mnemiopsis population size in the Caspian Sea that was preformed in Turkey and Iran during 2002-2003. At 2002, 87 specimens of B. ovata, 10-50 mm transferred to Caspian sea ecology research center from Marmareh sea where acclimated with Caspian sea water gradually. At 2003, experiments were performed near to Black sea (at Sinop) with freshly collected Beroe ovata, 40-65 mm size in three salinity level treatment, the Black sea water 18 , Mixed water 15 and Caspian water 12 . 130 individuals of Beroe ovata were brought from Sinop (Turkey) to Iran during 2003. A number of Beroe specimens were sent to Guilan province for reproduction studies and another part were sent to Mazandaran province for both reproduction and mesocosem studies. For control we had 1 Beroe, length 30 mm in the Black Sea water that was alive during of study in Iran. The Jars were examined each day for ova and larvae and they were collected and put into glass container of Caspian water for hatching and developing survey, some of them were left without any handling for larvae developing. Also in another experiment the eggs collected from jars were placed in the same three treatments for studying of growth and survival. The results were unsuccessful on propagation experiments at 2002 since the spawning and hatching rates were very low (20 ova) and, none of the larvae developed into adults in Caspian Sea water. The spawning was more in Marmareh sea water with 138 ova where only 7 larvae was hatched. Results showed that Beroe specimens is able to survive and reproduce in Caspian water but was not as well as Black Sea also the Beroe larvae growth rate is low in the Caspian Sea water. Maximum fecundity of Beroe individual was 2212 and 235 ovae in Caspian sea water in site Sinop and Iran respectively. Results showed 34-100% eggs in Caspian sea water were destroyed and did not develop. In Iran we obtained only one larvae with 5 mm length, other larvae were at different stages of development but most of them were 1.2 2 mm. The results of mesocosm survey showed most of ova and larvae have been obtained from the tanks where individuals B. ovata were with Mnemiopsis. Fecundity of Beroe in the control with Black Sea water were between 17 to 1879 with average of 828 ± 112 ova. The poor results of B. ovata reproduction obtained in this survey in Caspian sea may be due to transportation and acclimation stress and low salinity of Caspian Sea water.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Mnemiopsis leidyi ; Beroe ovata ; Survival ; Growth ; Comprehensive ; Laboratory
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 85pp.
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