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This research was done to study on communities' strucure of benthic animals' growth on artifitial reefs, constructed in Hendijan coastal waters in khozestan in Nort west Persian Gulf. The seasonal sampels of attached organisms were collected from spring to winter during 2010 year study.One station (D) in older and three stations (A, B, C) in newer reef site were selected.Random sampling was carriedout by using quadrat (25×25) via diving. During survey, the number of 59 species of attached animals belong to 13 animal groups, including, 9 species of cnidarian, 8 species of spoges, 7 species of Gastropoda, 8 species of Bivalve, 4 species of polychaet and 17 species of Crastacean were identified. In studied artifitial reef apoint of biomass, softcoral were dominant group which include 92% of total biota, and the species Plumarella sp. is the dominant species. However, apoint of abundance the species pisidia sp. from anomura crabs was the most abundant species especially in station A and D. Different kind of Cnidarian such as Dendronephthya sp., Sarcophyton sp. And Lobophyllia sp. was observed in station D for the first time. The polychates, Mollusk and some of crustacean and Echinodermata species were observed in lower abundance in comparision with previous studies. This results show that communities have been changed along time. According to MDS analysis, based on Bray-Curtis similarity, different stations presented seasonal variation based on identified species-biomass. Clustering analysis based on mean biomass indiffernt seasons explained that. Station D in 55%, station B in 75% and staton A and C in 80% similarity were Seperated. According to obtained results, there were not signifidant differences between station that can be caused by similarity in structural characteristics such as bottom slope and age of reefs. The mean abundance in spring was significantly high than other seasons. Which can be caused due to bioticfactos such as life cycle and reproduction season? In this research, fish communities accord to recorded information by visual consus and fisheries Traps arund the reefs, hare been increasing. In present study with increasing biomass in the biotic communities on artificial reefs enhancement of fish stock most be expected. These substrates can be reduced the pressure on destructed which is the opportunity for rehabilitation. In present study with increasing biomass in the biotic communities on artificial reefs enhancement of fish stock most be expected. These substrates can be reduced the pressure on destructed which is the opportunity for rehabilitation. The most frequent and abundant fish species was Epinephelus sp. This species was presented in all stations and seasons. The other abundant fish species were Scolopsis sp.,Epinephelus coioides, Diplodus sargus and Neopomacentrue sp..

This research was done to study on communities' strucure of benthic animals' growth on artifitial reefs, constructed in Hendijan coastal waters in khozestan in Nort west Persian Gulf. The seasonal sampels of attached organisms were collected from spring to winter during 2010 year study.One station (D) in older and three stations (A, B, C) in newer reef site were selected.Random sampling was carriedout by using quadrat (25×25) via diving. During survey, the number of 59 species of attached animals belong to 13 animal groups, including, 9 species of cnidarian, 8 species of spoges, 7 species of Gastropoda, 8 species of Bivalve, 4 species of polychaet and 17 species of Crastacean were identified. In studied artifitial reef apoint of biomass, softcoral were dominant group which include 92% of total biota, and the species Plumarella sp. is the dominant species. However, apoint of abundance the species pisidia sp. from anomura crabs was the most abundant species especially in station A and D. Different kind of Cnidarian such as Dendronephthya sp., Sarcophyton sp. And Lobophyllia sp. was observed in station D for the first time. The polychates, Mollusk and some of crustacean and Echinodermata species were observed in lower abundance in comparision with previous studies. This results show that communities have been changed along time. According to MDS analysis, based on Bray-Curtis similarity, different stations presented seasonal variation based on identified species-biomass. Clustering analysis based on mean biomass indiffernt seasons explained that. Station D in 55%, station B in 75% and staton A and C in 80% similarity were Seperated. According to obtained results, there were not signifidant differences between station that can be caused by similarity in structural characteristics such as bottom slope and age of reefs. The mean abundance in spring was significantly high than other seasons. Which can be caused due to bioticfactos such as life cycle and reproduction season? In this research, fish communities accord to recorded information by visual consus and fisheries Traps arund the reefs, hare been increasing. In present study with increasing biomass in the biotic communities on artificial reefs enhancement of fish stock most be expected. These substrates can be reduced the pressure on destructed which is the opportunity for rehabilitation. In present study with increasing biomass in the biotic communities on artificial reefs enhancement of fish stock most be expected. These substrates can be reduced the pressure on destructed which is the opportunity for rehabilitation. The most frequent and abundant fish species was Epinephelus sp.. This species was presented in all stations and seasons. The other abundant fish species were Scolopsis sp.,Epinephelus coioides, Diplodus sargus and Neopomacentrue sp.. Iranian Fisheries Science Research Institute Published

Without industrial and urban development and their effects on marine ecosystem, due to high biotic potential, Khure-Mussa would be one of the productive coastal areas. Because of sensitivity and vulnerability to environmental changes this area are classified in sensitive ecologic area. This study was conducted to evaluation ecological health status in Khure-Mussa in the Northwest of Persian Gulf by using benthic indices. Twenty creeks in Khure-Mussa area were set up for study and sampling in four seasons from winter 2008 to autumn 2009. Monthly water sampling for physico-chemical parameters was done by bottle sampler and seasonal samples of surface sediment were collected by Peterson grab sampler (0.125m^2) .At each station three samples for macrobenthic study and one sample for grain size analysis and organic matter determination were obtain. Totally, 187589 macrobenthic individual were collected and separated. Among identified groups, Polychaetes with total number108906, Crustacean with total number 46561, Bivalve with total number 14156 and seapen with total number 9841 were the dominant groups and were included 58, 25, 8 and 5 percentage of total number respectively. The highest abundance in the spring and the lowest abundance in the summer were observed. According to mean abundance, Somaily creek and Khure-mussa (3) station showed the highest and the lowest abundance respectively. Seapen is included more than 90 % of total biomass. The range of Shannon diversity index was (1.95-3.58) which the minimum and the maximum values were found in Shipping and Patil station respectively. Significance benthic biological parameters (abundance and richness) in different creeks explained the variation of benthic community structure in studied creeks. In addition, seasonal significant differences were found in these parameters due to seasonal changes in benthic animal s succession. The results of grain size analysis showed that the range of siltclay was (63.6-95.59). According to AMBI index values, all of the studied creeks are classified in slightly pollution level and disturbed condition except for Petrochemical station that placed in moderate pollution level. The BOPA index values in all stations showed more than threshold level (0.19) that means bad and weak ecological condition. The highest and the lowest ITI index values were observed in Oil exporting port station (64.92) and Ghazaleh creek (29.53) respectively. The others were grouped in 30-60 range that means moderate pollution level and disturbed ecological status. The values of ABC (Abundance Biomass Curve) that explained the relation between macrobenthic biomass and abundance, were calculated near zero from 0.1 to -0.1 in all studied creeks that show moderate condition for living animals. In general the studied creeks showed pollution potential and benthic biological parameters indicated downward trend in ecological quality and health status.

Without industrial and urban development and their effects on marine ecosystem, due to high biotic potential, Khure-Mussa would be one of the productive coastal areas. Because of sensitivity and vulnerability to environmental changes this area are classified in sensitive ecologic area. This study was conducted to evaluation ecological health status in Khure-Mussa in the Northwest of Persian Gulf by using benthic indices. Twenty creeks in Khure-Mussa area were set up for study and sampling in four seasons from winter 2008 to autumn 2009. Monthly water sampling for physico-chemical parameters was done by bottle sampler and seasonal samples of surface sediment were collected by Peterson grab sampler (0.125m2) .At each station three samples for macrobenthic study and one sample for grain size analysis and organic matter determination were obtain. Totally, 187589 macrobenthic individual were collected and separated. Among identified groups, Polychaetes with total number108906, Crustacean with total number 46561, Bivalve with total number 14156 and seapen with total number 9841 were the dominant groups and were included 58, 25, 8 and 5 percentage of total number respectively. The highest abundance in the spring and the lowest abundance in the summer were observed. According to mean abundance, Somaily creek and Khure-mussa (3) station showed the highest and the lowest abundance respectively. Seapen is included more than 90 % of total biomass. The range of Shannon diversity index was (1.95-3.58) which the minimum and the maximum values were found in Shipping and Patil station respectively. Significance benthic biological parameters (abundance and richness) in different creeks explained the variation of benthic community structure in studied creeks. In addition, seasonal significant differences were found in these parameters due to seasonal changes in benthic animal s succession. The results of grain size analysis showed that the range of siltclay was (63.6-95.59). According to AMBI index values, all of the studied creeks are classified in slightly pollution level and disturbed condition except for Petrochemical station that placed in moderate pollution level. The BOPA index values in all stations showed more than threshold level (0.19) that means bad and weak ecological condition. The highest and the lowest ITI index values were observed in Oil exporting port station (64.92) and Ghazaleh creek (29.53) respectively. The others were grouped in 30-60 range that means moderate pollution level and disturbed ecological status. The values of ABC (Abundance Biomass Curve) that explained the relation between macrobenthic biomass and abundance, were calculated near zero from 0.1 to -0.1 in all studied creeks that show moderate condition for living animals. In general the studied creeks showed pollution potential and benthic biological parameters indicated downward trend in ecological quality and health status. Iranian Fisheries Science Research Institute Published

Following studies on the identification and estimation of fish larvae density in Khoozastan Creeks study was carried ouu in East coast of Khoozestan to completely cover the area, from Dec. 1999 till Nov, 2000. Monthly samplings were carried out in 4 stations in East coasts of Khoozestan watere (Eastern side of Khor e - Mosa channal), using 500 micron Bongo net and oblique haules from bottom to the surface. From a total No. of 4765 observed larvae, 24 families were identified. Gobiidae (29,670) Clupeiformes Per Flexion (21.3%), Leiognathidae (10.6%), Clupeidae (163%) and Callionymidae (4.45%) were the dominate families. Other families such as Cynoglossidae, Scianidai, Engraulidae. Bregmacerotidae, etc,. were scarce. Half of the obser.red larvae were common in all the sampling stations Except serimeh station that showed a, higher larval frequency, other Stations were similar in this regurd.Mean diversity index was highest in May, June, July and Auguest and was lowest in Aprill, Octa and NOV. Analysis of variance only showed significant differences of diversity indices between seasons, and Spring and Summer were different from Autumn and Winter. Analysis of averge values of these two indices in the studied areas only showed the significance of evenness in various areas, and grouping searated the East coast from other two areas (Creeks and the West coasts), Non significance of diversity index in the studies areas shows that they could be similar. All the identified larvae were also present in Creeks and the west coasts, and most of the families present in West coasts were also observed in the East coast. Iranian Fisheries Science Research Institute Published

In this study 401 specimens of Gattan (Barbus xanthopterus) caught by drifting and set gillnets, cast nets and forks were studied. Samples were collected monthly (October 1996 to September 1997) from Hamidieh Dam to Hour-Al-Azim Lagoon. Morphometric and meristic parameters and biological characteristics were studied in the laboratory. The Highest frequency of Gattan in the river was in March and in Hour-Al-Azim was in December. The length range of the fish in the river was broader than in the hour, and fishes with lengths more than 700mm were only observed in the river. Sharp decrease in GSI in May and occurence of spawning in May and June showed that reproduction of this species occurs in spring (in a two month period) and is relatively short. Minimum and maximum ova diameter were 0.01mm and 2.25mmin stages II and IV of gonad maturity respectively. An increasing trend in ova diameter up to April and decreasing in June showed one time spawning of this species. Surface water temperature in the spawning season was between 25.5oC and 28.65oC and turbidity was in its lowest level in this period. Sex maturation in males occurred in length of 151-200mm (one year old), and in females in 501-550mm (3 years old). Average sex ratio (male to female) was 1:1.31 which is not significantly different from 1:1 (95% confidence limit).