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  • Density  (5)
  • Conservation
  • 1
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    The growth of faunal aquatics on artificial reefs in Bandar Lengeh Area, Persian Gulf (2017)
    Details
    Publication Date: 2021-05-19
    Description: The growth of organisms on seven different artificial reef structures was surveyed from 2004-2006 in Hormuzgan offshore waters (Bandar Lengeh area). The organisms consisted of 12 groups the main of which included Barnacle (Megabalanus tintinnabulum), Sponges with five families and Tunicates. The highest density was observed in 2005, amounting to some 409.224g wet weight on each structure. However, a decrease was observed afterwards in the total mass of aquatics living on the structures. Some organisms such as crabs, polychaets, bivalves and fish larvae showed an increasing in size in the first year. Bivalves showed a decreasing trend in density but otherwise an increasing trend in size over time. Artificial shape of the reefs was not effective on the total density of the organisms living on the structures. Total density of live organisms on different parts of the artificial reefs (surface, middle and bottom) was not statistically significant (P〉0.05). Numbers of crabs on mixed artificial reefs were higher than the other artificial reefs. This was also the same for barnacles.
    Description: Published
    Keywords: Faunal ; Artificial reefs ; Habitat ; Invertebrate ; Bandar Lengeh ; Growth ; Aquatics ; Density
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.75-88
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  • 2
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    An investigation on aquatics diversity and density in marine artificial reef, Moloo area of Bandar-e-Lengeh, Persian Gulf (2018)
    Details
    Publication Date: 2021-05-19
    Description: Published
    Keywords: CPUE ; Artificial Reef ; Fish ; Density ; Diversity ; Marine
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.129-138
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  • 3
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    Monitoring of commercial marine stocks around Hormuzgan (bandar-e-Lengeh) artificial reefs (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Over-fishing of marine resources has endangered many commercial fish species in the world; with aquaculture development, setting up artificial reef systems is an important way for marine stocks and fishing enhancement. The present study was designed to monitor fish abundance and species changes around a small and newly established artificial reef system in Moloo area at Bandar-e-Lengeh during two years after installation (Sep. 2005 to Sep. 2007). The artificial reef includes three types of concrete structures arranged in a seven by three grid. Each cross point considered as a sampling station and two other stations selected from two sides of the system as control stations. Based on obtained results CPUE (P = 0.00001), frequency (P = 0.001) and species diversity of captured fishes (P = 0.024) showed significant differences between three types of sampling traps. With type of structures, The CPUE and frequency of fishes in transect 7(mixed structures) showed the significant differences with other six transects (p= 0.001, P = 0.009). No diversity relationships were seen between transects (p= 0.100). In this study there were no significant differences between depths. Although the means of CPUE between seasons were different, but the ANOVA test could not show the significant differences because of the differention between variances. The T-Test showed no significant differences between the number per trap per day dominant species (Epinephelus coioides, Plectorhinchus shotaf, Diagrama pictum, Siganus javus ) in different seasons. Movie prepared from artificial reefs showed diversity of fish were more than that of fishing by trap. Although fishes increased but there was no enough causes evidences for product in artificial reefs. Therefore, the study need to continue in this area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial ; Artificial reef ; Monitoring of stocks ; Density ; Diversity ; CPUE ; Marine ; Species ; Aquaculture ; CPUE ; ANOVA ; Epinephelus coioides ; Plectorhinchus shotaf ; Diagrama pictum ; Siganus javus
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 80pp.
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  • 4
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    Monitoring of commercial marine stocks around Hormuzgan (bandar-e-Lengeh) artificial reefs (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25203 | 18721 | 2018-09-05 16:18:18 | 25203 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Over-fishing of marine resources has endangered many commercial fish species in the world; with aquaculture development, setting up artificial reef systems is an important way for marine stocks and fishing enhancement. The present study was designed to monitor fish abundance and species changes around a small and newly established artificial reef system in Moloo area at Bandar-e-Lengeh during two years after installation (Sep. 2005 to Sep. 2007). The artificial reef includes three types of concrete structures arranged in a seven by three grid. Each cross point considered as a sampling station and two other stations selected from two sides of the system as control stations. Based on obtained results CPUE (P = 0.00001), frequency (P = 0.001) and species diversity of captured fishes (P = 0.024) showed significant differences between three types of sampling traps. With type of structures, The CPUE and frequency of fishes in transect 7(mixed structures) showed the significant differences with other six transects (p= 0.001, P = 0.009). No diversity relationships were seen between transects (p= 0.100). In this study there were no significant differences between depths. Although the means of CPUE between seasons were different, but the ANOVA test could not show the significant differences because of the differention between variances. The T-Test showed no significant differences between the numbers per trap per day dominant species (Epinephelus coioides, Plectorhinchus shotaf, Diagrama pictum, Siganus javus) in different seasons. Movie prepared from artificial reefs showed diversity of fish were more than that of fishing by trap. Although fishes increased but there was no enough causes evidences for product in artificial reefs. Therefore, the study need to continue in this area.
    Keywords: Ecology ; Iran ; Hormuzgan Province ; Bandar Lengeh ; Artificial reef ; Monitoring of stocks ; Density ; Diversity ; CPUE ; Marine ; Species ; Aquaculture ; ANOVA ; Epinephelus coioides ; Plectorhinchus shotaf ; Diagrama pictum ; Siganus javus
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 80
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  • 5
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    The growth of faunal aquatics on artificial reefs in Bandar Lengeh Area, Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/21822 | 18721 | 2018-01-10 17:02:43 | 21822 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: The growth of organisms on seven different artificial reef structures was surveyed from 2004-2006 in Hormuzgan offshore waters (Bandar Lengeh area). The organisms consisted of 12 groups the main of which included Barnacle (Megabalanus tintinnabulum), Sponges with five families and Tunicates. The highest density was observed in 2005, amounting to some 409.224g wet weight on each structure. However, a decrease was observed afterwards in the total mass of aquatics living on the structures. Some organisms such as crabs, polychaets, bivalves and fish larvae showed an increasing in size in the first year. Bivalves showed a decreasing trend in density but otherwise an increasing trend in size over time. Artificial shape of the reefs was not effective on the total density of the organisms living on the structures. Total density of live organisms on different parts of the artificial reefs (surface, middle and bottom) was not statistically significant (P〉0.05). Numbers of crabs on mixed artificial reefs were higher than the other artificial reefs. This was also the same for barnacles.
    Keywords: Ecology ; Fisheries ; Habitat ; Invertebrate ; Density ; Bandar Lengeh ; Persian Gulf ; Iran ; growth ; reef
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 75-87
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  • 6
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    Study of biotic communities for artificial reef placement in Hormuzgan Province waters, the Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/21830 | 18721 | 2018-01-11 10:22:07 | 21830 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: Persian Gulf waters (Hormuzgan Province) were studied from seasonally to determine the best locations for installation of artificial reefs. The area was stratified for 10 transects and each transect was divided into three stations: Station 1 for waters below 10m, station 2 for waters between 10 and 20m and station 3 for waters between 20 and 30m deep. Habitats of fauna and flora including communities of corals, seaweeds, sea cucumbers and sea grasses and sedimentation depth through scuba diving were studied in each transect and sub-transects. Sea grass communities existed in some spots within station 1 in Bandar Mesan, Bandar Lengeh, Kish Island and Bandar Chirooyeh transects, while for station 2, sea grasses were absent from Chirooyeh transect and present in Bandar Mesan, Bandar Kong and Kish Island transects. Also, seaweed habitats existed in station 1 in Bandar Mesan transect and some areas in Bandar Lengeh transect. Study of coral and sea cucumber communities indicated existence of Acropora sp. habitats in Bahman jetty, Bandar Mesan and Bandar Bostaneh transects, Porites sp. habitat in Hengam Island transect, Holothuria sp. habitats in Bandar Mesan and Bandar Lengeh transects and Stichopus sp. habitat in Hengam Island transect. All of these habitats were located in station 1 and had patchy distribution which was drawn in GIS software. Calculated sedimentation depth using degree scale in different transects demonstrated statistically significant differences between station 1 in Bandar Salakh transect and the same stations in other transects, also between station 2 and station 3 in other transects (P〈0.05). The result of sedimentation depth assessment showed that station 2 in Bandar Lengeh area up to Hendurabi Island were better for artificial reefs installation compared to south of Gheshm Island with the exception of Bandar Kong and Bandar Chirooyeh transects.
    Keywords: Biology ; Conservation ; Fisheries ; Artificial reef ; GIS ; Coral ; Sea cucumber ; Seaweed ; Sea grass ; Persian Gulf ; Iran ; Acropora ; Stichopus
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 9-16
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