Production capacity assey of Alagol, Almagol and Adjigol international wetlands, Golestan Province

Estimation of initial production capacity is one of the important principles of water resources assessment and management. Due to the size, depth and different positions of wetlands (inlet area, middle and near the dam base) of some physicochemical parameters of water, plankton (phytoplankton and zooplankton), macrobenthos and fish from 3 stations, in Alagol wetland, 2 stations in Ajigol wetland and 2 stations in Almagol wetland were sampled for one year from winter 2016 to autumn 2017. Comparison of the three wetlands, the results showed that in all seasons, the highest biomass per hectare was observed that phytophagus fish and zoophagus fish in Ajigol is much higher than the other two wetlands. Regarding benthic fish biomass, most biomass was observed in spring, summer and winter in Almagol wetland and in autumn in Ajigol wetland. The highest abundance in all three wetlands is related to Gambusia and in excluding Gambusia fish, the highest abundance in Alagol wetland is related to crucian carp, in Ajigol capoeta and common carp and in Almagol, crucian carp and in relative weight, phytophaguus and crucian carp were the dominant fish. Also, catfish are found only in Alagol lagoon. It seems that the role of releasing benthic fish such as common carp should be considered more and invasive fish should be controlled.