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  • 1
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    Stock assessment of the bony fishes in Iranian coastal waters of the Caspian Sea (2005-2007) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Exploitation of bony fishes resources started on 12 October 2005 and finished on 9 April 2006 in 2005-2006. 142 beach seines caught about 14333.4 tons of bony fishes by 47101 hauling. The total catch was estimated 21844.7 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 97 percent of total catch. Length classes 39-40, 31-32 and 40-41 cm predominated for kuttum, golden grey mullet and common carp, respectively. Age groups 3 to 5 year comprised 84.2, 74.8 and 83.7 percent for Kuttum, golden grey mullet and common carp, respectively and age group 4 year was dominant with 42.0, 35.9 and 43.0 percent, respectively. K value and L∞ calculated 0.26 (/year) and 58.3 cm for Kuttum and 0.15 (/year) and 61.5 cm for golden grey mullet, respectively. The total biomass and MSY estimated about 24733.7 and 8550.4 tones for kuttum and about 16948.0 and 4999.0 tones for golden grey mullet, respectively. Exploitation rate (E) calculated 0.71 and 0.70 for Kuttum and golden grey mullet, respectively. In 2006-2007, the exploitation of bony fishes resources started on 12 October 2006 and finished on 7 April 2007 in 2006-2007. 134 beach seines caught about 14120.0 tones of bony fishes by 48470 hauling. The total catch was estimated 23801.8 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 98.5 percent of total catch. Length classes 39-40 and 38-39 cm predominated for kutum and common carp, respectively and length classes 27-28 and 29-30 cm predominated for golden grey mullet. Age groups 3 to 5 year comprised 80.2 and 71.8 percent for kutum and golden grey mullet, respectively and age groups 4 to 6 year comprised 71.8 percent for common carp. Age group 3, 4 and 5 year was dominant with 35.5, 32.1 and 27.1 percent for kutum, golden grey mullet and common carp respectively. K value and L∞ calculated 0.27 (/year) and 60.7 cm for Kutum, 0.2 (/year) and 58.4 cm for golden grey mullet and 0.19 (/year) and 66.7 cm for common carp, respectively. The total biomass and MSY estimated about 46654.9 and 14801.4 tones for Kutum, about 19549.0 and 5748.4 tones for golden grey mullet and about 10584.3 and 2186.0 tones for common carp, respectively. Exploitation rate (E) calculated 0.69, 0.53 and 0.52 for kuttum, golden grey mullet and common carp, respectively.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Bony fishes ; Kuttum ; Golden grey mullet ; Growth and mortality parameters ; Biomass ; MSY ; Common carp ; Coastal waters
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 165pp.
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  • 2
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    General fisheries investigations of Maco and Mahabad reservoir (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: During the year 1998 1999 Mako and Mabhabad reservoirs were surveyed by Fisheries Research Center of Guilan province Mahabad Resevoir located at 36 47 N ( Lat ) and 45 , 43 E ( Long ) in western It has an average area of 700 hectares and is mesotroph- that Azarbiajan province chracterized by depletion of oxygen in the bottom during warm months In phytoplankton , Chrysophyta and in zooplankton Rotifera were dominance . There is low diversity of benthic animals in this reservoir and Oligocheata and Chironomidae are two benthic forms that comprise the most populations The fishes of this water body can be categorized in two groups : endemic and exotic . Ichthyofauna of the reservoir and its catchment area comprise 9 endemic species and subspecies and 9 exotic species and subspecies that located in 4 family , Cyprinidae , Balitoridea Siluridea and Poeciiiidae In the reservoir and its inlets and outlets , Cyprinidae is salient component of the ichthyofauna by a figure of 83.3 % . The fishes of this reservoir are ail kind of food zooplanktoniphagous level consumers such as phytoplanktoniphagous benthophagous and picsivorous Parasitic diseases are highly incident among the fishes of this water body and it can be said that fishes of the reservoir are widely infected by the parasitic diseases . The most important waterfowls and seashore birds are that migrate to the reservoir for wintering . The most commercially endemic fish species are Sia mahi ( Capoeta capoeta ) dace ( Leuciscus cepha/us ) and catfish ( Si/urus g/anis ) and commercially exotic species are common carp ( Cyprinus carpio ) Silver carp ( Hypophtha/michthys molitrix ) and Big head (Hypophtha/michthys The annual catch of endemic and exotic species in 1998 were 124 and nobi/is ) Stock estimation showed over exploitation and 111.9 tonnes respectively underexploitation for exotic ( big head and silver carp ) and endemic ( dace and sia mahi ) fish species respectively . Estimation revealed that this reservoir annually can produce 14323 tonnes of silver carp big head and common carp and for achiveing this figuer anoually 394000 fingerlings of mentioned species should be released in this Mako reservoir which is situatd on Zang Mar river was built in 1995 It is 12 Km to Mako city with the geographical identification of 39 11 N ( Lat ) and 49 29 E ( Long ) It is a earth kind reservoir that has a maximum depth of 77 m . The length of the barrier is 210 m and the upper and lower wide of the barrier are 10 and 350 m respectively Three river entred to the reservoir are Ghezet Chay , Emam Gholi and Dibak .
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Oligocheata ; Chironomidae ; Ichthyofauna ; Cyprinidae ; Zooplankton ; Phytoplankton ; Capoeta capoeta
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 159pp.
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  • 3
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    An investigation on the Benthic Macrofauna of the Anzali lagoon (2018)
    Details
    Publication Date: 2021-05-19
    Description: Anzali lagoon is one of the most important wetlands in the southwestern part of the Caspian sea. The lagoon, once being in suitable habitat for spawning of commercial fishes particularly sturgeons has been exposed to various sources of pollution originating mainly from urban and industrial sewages distracting habitats and lowering number of migratory spawner fishes. I.F.R.T.O conducted a Joined research project with F.A.O for two years (1991_1992) on the planktonic benthic and fishery resources of the lagoon. 18 stations were established over the lagoon and connecting rivers for plankton and benthos studies. Every other week 9 stations were surveyed. The study revealed that the family Tubificidac was dominant followed by larvae of chironomidae. Odonata (Naiads stage) had the lowest abundance In the lagoon in 1991 and it was the same for cumacea in 1992. The lowest abundance of benthic macrofauna during the study period was detected in station No. 1 situated in the mouth of the water break. The abundance of benthic organisms in 1991 were much more than in 1992. Nereis was observed in the opening of western part of the lagoon in 1991 Indicating intrusion of sea waters to the lagoon where the water level was low. In 1992 nereis was found to be distributed up to the middle of the western parts of the lagoon.
    Description: Published
    Keywords: Chironomidae ; Plankton ; Benthos ; Larvae ; Abundance ; Macrofauna
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.27-38
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  • 4
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    Stock assessment of the bony fishes in Iranian coastal waters of the Caspian Sea (2005-2007) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25192 | 18721 | 2018-09-05 16:01:12 | 25192 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Exploitation of bony fishes resources started on 12 October 2005 and finished on 9 April 2006 in 2005-2006. 142 beach seines caught about 14333.4 tons of bony fishes by 47101 hauling. The total catch was estimated 21844.7 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 97 percent of total catch. Length classes 39-40, 31-32 and 40-41 cm predominated for kutum, golden grey mullet and common carp, respectively. Age groups 3 to 5 year comprised 84.2, 74.8 and 83.7 percent for Kutum, golden grey mullet and common carp, respectively and age group 4 year was dominant with 42.0, 35.9 and 43.0 percent, respectively. K value and L_∞ calculated 0.26 (/year) and 58.3 cm for Kutum and 0.15 (/year) and 61.5 cm for golden grey mullet, respectively. The total biomass and MSY estimated about 24733.7 and 8550.4 tones for kutum and about 16948.0 and 4999.0 tones for golden grey mullet, respectively. Exploitation rate (E) calculated 0.71 and 0.70 for Kutum and golden grey mullet, respectively. In 2006-2007, the exploitation of bony fishes resources started on 12 October 2006 and finished on 7 April 2007 in 2006-2007. 134 beach seines caught about 14120.0 tons of bony fishes by 48470 hauling. The total catch was estimated 23801.8 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 98.5 percent of total catch. Length classes 39-40 and 38-39 cm predominated for kutum and common carp, respectively and length classes 27-28 and 29-30 cm predominated for golden grey mullet. Age groups 3 to 5 year comprised 80.2 and 71.8 percent for kutum and golden grey mullet, respectively and age groups 4 to 6 year comprised 71.8 percent for common carp. Age group 3, 4 and 5 year was dominant with 35.5, 32.1 and 27.1 percent for kutum, golden grey mullet and common carp respectively. K value and L∞ calculated 0.27 (/year) and 60.7 cm for Kutum, 0.2 (/year) and 58.4 cm for golden grey mullet and 0.19 (/year) and 66.7 cm for common carp, respectively. The total biomass and MSY estimated about 46654.9 and 14801.4 tones for Kutum, about 19549.0 and 5748.4 tones for golden grey mullet and about 10584.3 and 2186.0 tones for common carp, respectively. Exploitation rate (E) calculated 0.69, 0.53 and 0.52 for kutum, golden grey mullet and common carp, respectively.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Bony fishes ; Kuttum ; Golden grey mullet ; Growth and mortality parameters ; Biomass ; MSY ; Common carp ; Coastal waters
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 165
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  • 5
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    An investigation on the benthic macrofauna of the Anzali Lagoon (2021)
    In:  http://aquaticcommons.org/id/eprint/23570 | 18721 | 2018-07-06 18:57:36 | 23570 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-14
    Description: Anzali Lagoon is one of the most important wetlands in the southwestern part of the Caspian Sea. The lagoon, once being in suitable habitat for spawning of commercial fishes particularly sturgeons has been exposed to various sources of pollution originating mainly from urban and industrial sewages distracting habitats and lowering number of migratory spawner fishes. I.F.R.T.O conducted a Joined research project with F.A.O for two years (1991_1992) on the planktonic benthic and fishery resources of the lagoon. 18 stations were established over the lagoon and connecting rivers for plankton and benthos studies. Every other week 9 stations were surveyed. The study revealed that the family Tubificidac was dominant followed by larvae of Chironomidae. Odonata (Naiads stage) had the lowest abundance in the lagoon in 1991 and it was the same for Cumacea in 1992. The lowest abundance of benthic macrofauna during the study period was detected in station No. 1 situated in the mouth of the water break. The abundance of benthic organisms in 1991 were much more than in 1992. Nereis was observed in the opening of western part of the lagoon in 1991 indicating intrusion of sea waters to the lagoon where the water level was low. In 1992 Nereis was found to be distributed up to the middle of the western parts of the lagoon.
    Keywords: Biology ; Ecology ; Plankton ; Benthos ; Larvae ; Abundance ; Macrofauna ; Chironomidae ; Caspian Sea ; Anzali Lagoon ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 27-38
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