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  • Iran  (18)
  • Fish  (5)
  • 11
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    In:  http://aquaticcommons.org/id/eprint/22898 | 18721 | 2018-06-05 22:30:52 | 22898 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-11
    Description: The application of new probiotics is a good strategy in the biological control of infectious diseases in aquaculture. Approximately 100 marine actinobacteria isolates were obtained from 10 sediment samples of shrimp farms. Heat treatment of sediment samples resulted in a selective reduction of the non actinobacterial heterotrophic microflora. Starch nitrate agar medium exhibited more efficacy than glycerol arginine agar medium for isolation. Twenty seven percent of actinobacterial isolates showed antagonistic activities against pathogenic Vibrio spp. All the antagonistic isolates showed the typical morphology of genus Streptomyces. Exoenzymatic activity screening showed that 44%, 26%, 37% of antagonistic isolates represented amylase, lipase and protease activities, respectively. MNM-1400 strain exhibited highest antagonistic and exoenzymatic activity. The pathogenicity experiment revealed that MNM-1400 strain did not cause disease in Litopenaeus vannamei larvae. Extraction of produced antibacterial compounds by MNM-1400 strain showed that the active constituent didn’t have non polar property. Morphological, physiological and biochemical identification confirmed that MNM-1400 strain belonged to the genus Streptomyces. Phylogenetic analysis by 16S rRNA gene sequencing showed a high similarity between MNM-1400 strain and Streptomyces californicus (similarity: 99%). These results suggest that the MNM-1400 strain can be considered as a potential probiotic in aquaculture.
    Description: Issue number on first page of article is incorrect; should be 15(2), not 15(1).
    Keywords: Aquaculture ; Biology ; Fisheries ; Probiotic ; Marine actinobacteria ; Biological control ; Shrimp ; Litopenaeus vannamei ; Biotechnology ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 630-644
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  • 12
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    In:  http://aquaticcommons.org/id/eprint/23031 | 18721 | 2018-06-15 18:58:36 | 23031 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-12
    Description: Allometric growth pattern and body shape changes of the Green terror (Andinoacara rivulatus) (Cichlidae) were studied using landmark-based geometric morphometric (GM) and traditional methods, from hatching up to 1266 Hours Post Hatching (HPH) under culture conditions. The left side of specimens were photographed using digital camera and morphometric characters, including total length, head length, tail length, trunk length, eye diameter, snout length and body depth were measured using ImageJ software. In GM method, ten landmark-points were digitized on 2D pictures. Allometric growth patterns were calculated as a power function of total length and described by the growth coefficient to reveal important steps in the species’ early life history. The scores of relative warp analysis (RW) were used as descriptors for the variation in shape. The growth patterns obtained by both traditional morphometric (TM) and GM methods showed similar patterns, but GM showed effective results to interpret the morphological changes and revealing larval stages based on the body shape change. The results also showed higher growth rate of head and tail regions up to yolk sac absorption following by isometric patterns, after begin of exogenous feeding. Based on the findings, the early development of this species can be divided into five stages based on its morphology, including newly hatching larvae (up to 48 HPH), younger larvae (156 HPH), older larvae (426 HPH), younger juvenile (666 HPH) and juveniles. The results confirmed this fact that morphological development and growth patterns during early life stages in A. rivulatus closely match its immediate required function.
    Keywords: Biology ; Aquarium ; Relative warp ; Ontogeny ; Morphometrics ; Andinoacara rivulatus ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 222-237
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  • 13
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    In:  http://aquaticcommons.org/id/eprint/23112 | 18721 | 2018-06-17 20:25:13 | 23112 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-12
    Description: Survey on zooplankton composition was studied during June 2015 to March 2016, by selecting six stations along the coastal waters of Bushehr (the Northwest Persian Gulf). Twenty four zooplankton taxa were identified, and the different zooplankton groups represented twenty-one families. Copepoda was recorded with the most abundance (53.30 %) followed by Malacostraca (32.87 %), which in turn was followed by Sagittoidea (7.44 %) and Appendicularia (6.39%). A major peak of 189.34 N/m3 was observed in February-2016 with 53.25% contribution from Copepoda. Among Copepoda, Labidocera sp. was the major contributor to this peak. Appendicularia was the comparatively less represented group, being chiefly represented by Oikopleura dioica. Labidocera sp., Oithona plumifera which were common in most of the stations. This common distribution were observed for Malacostraca, namely Lucifer hanseni (mysis I), Upogebia sp. (zoea I), Parthenope sp., Ilyoplax frater( zoea VI), for Sagittoidea, namely Sagitta enflata, Sagitta neglecta and for Appendicularia, namely Oikopleura dioica. The mean Shannon's diversity index (H') and evenness were 1.36±0.43 and, 0.68±1.17, respectively. The highest Margalef's index was recorded in station-6 (2.72±1.32) and the lowest in station-2 (1.98±0.89). According to non-significant differences between temporal and spatial zooplankton density and Shannon’s index, from an ecological point of view, it seems the study area is unique and the zooplankton composition is homogenous.
    Keywords: Biology ; Ecology ; Zooplankton ; Density ; Diversity ; Persian Gulf ; Bushehr Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 722-732
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  • 14
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    In:  http://aquaticcommons.org/id/eprint/23134 | 18721 | 2018-06-18 17:24:20 | 23134 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-13
    Description: Coastal ecosystems of Bushehr are shallow environments subject to human impacts, including shrimp aquaculture and urban expansion activities. A spatial-temporal study was conducted in order to assess the actual ecological status of the creeks, estuary and marine sites on the basis of their taxonomic composition and density of mesozooplankton. Zooplankton species distribution and abundance data at 6 sampling sites during June 2015 - March 2016 revealed 24 taxa represented by 5 divergent groups. During the study period, high salinities (around 35-47) were recorded, characterizing all systems as a coastal-marine ecosystem, rather than true estuarine. The mesozooplankton assemblage was characterized by the dominant marine Copepod, Labidocera sp., zoeas of coastal/marine crab, Ilyoplax frater, marine copepod Acartia fossae and a marine pelagic tunicate, Oikopleura dioica. Copepods were the main dominant group and Labidocera sp the most abundant species, with high abundances in winter, whereas high abundances of the Ilyoplax frater were noticed in summer. Based on SIMPER analyses, highest dissimilarity was observed between Ramleh and Lashkary and discriminating taxa for all sites were Labidocera sp followed by Ilyoplax frater contributing to more than 68% of the total average dissimilarities for all locations. The multivariate BIO–ENV procedure indicated that Labidocera sp. followed by Acartia fossae strongly correlated to the variability of depth, transparency and salinity. Finally the results showed that temporal and spatial variation in the mesozooplankton community is consistent with the dynamic character of the habitat characterized as a typical coastal marine system (with low average depths, transparency and high salinity).
    Keywords: Biology ; Ecology ; Limnology ; Mesozooplankton ; Creek ; Estuary ; Bushehr Province ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 970-983
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  • 15
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    In:  http://aquaticcommons.org/id/eprint/23183 | 18721 | 2018-06-19 18:06:44 | 23183 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-13
    Description: In the current paper reproductive strategy and growth rates of Luciobarbus esocinus were investigated from 2010 to 2012, in Gamasiab River, Kermanshah, Iran. Samples were collected seasonally by gillnet and electro-fisher device. Sex ratio was evaluated from 162 individuals and the percentage of male and female individuals were 54.76% and 45.24% respectively. Age structure was distributed between I and V and most frequency numbers for males and females belonged to II and IV age group, respectively. Length-weight relationship was computed as W=8E-05TL^2.6546 for all individuals. Mean total length and weight was 333.82±13.10 mm and 297.67±4.85 g for males, and 371.5±21.17 mm and 307.85±7.64 g for females. The von-Bertalanffy growth models of L. esocinus were described as Lt =357.14×[1-e^(-0.77×(t-0.090))] for males, Lt =367.02×[1-e^(-0.78×(t–0.094))] for females and Lt =363.57×[1-e^(-0.76×(t –0.087))] for both sexes. Results indicated that growth factors were highly similar in spring, summer and winter. CDA analysis revealed that the total and gonad weight are the main factors in discriminant analysis. The highest GSI values were found in spring for females and winter for males, however, it decreased rapidly after spring in females. Maximum growth rates were observed in early ages (I-II) and depleted with ages. K value and L∞ were determined as 0.77±0.09 Y^-1 and 357.14±10.38 mm for males and 0.78±0.24 Y^-1 and 367.02±24.15 mm for females, respectively. In conclusion this study provided basic information for stock assessment and management of L. esocinus in Gamasiab Reservoir.
    Keywords: Biology ; Fisheries ; Management ; Life-history styles ; Reproduction ; Mangar ; Iranian inland waters ; Gamasiab River ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 194-207
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  • 16
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    In:  http://aquaticcommons.org/id/eprint/23731 | 18721 | 2018-07-21 03:28:25 | 23731 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-15
    Description: Ichthyoplanktons were identified and their abundance was determined in Gouater Creek &Bay, north-west of Oman Sea. Sampling was carried out from October 2005 to September 2006 and specimens were collected from six stations using single ring plankton net with 333k mesh size. Stations including: close to coastal waters (1, 2, 4), into creek (5 and 6) and close to Bahookalat creek out flowing waters (station 3). Measurement of the environmental factors showed that an average depth 4m, transparency was 75cm, salinity 37.08 g/l, pH 8.19, water temperature 27.3C for the study area. Totally, 585 specimens of diverse fish larval stages were collected in 20 sampling efforts with mean abundant of 11.682 numbers/10 m^(2). A total of 11 fish families were identified in the samples in which the dominant families larvae were Gobiidae, Clupeidae and Engraulidae with mean abundant of 6.875, 2.465 and 0.733 numbers/10 m^(2) respectively and the total abundance specimens of fish larvae were 86%. The most of the mean abundant fish larvae were observed in winter (27.712 numbers/10 m^(2)) and the least were recorded in autumn (3.724 numbers /10 m^(2)). The larval stage of the specimens was mostly Preflexion (87%) that shows the area is a nursery ground for the species. No correlation was found between abundance and temperature and salinity. Comparison of abundance showed a significant difference between stations 1, 3 and 5 with stations 2, 4 and 6 and also, winter by other seasons. The difference in diversity from pre monsoon and post monsoon periods was significant (P〉0.05).
    Keywords: Biology ; Species diversity ; Fish larvae ; Marine ; Ichthyoplankton ; Environmental factors ; ISW ; Arabian Sea ; Oman Gulf Iran ; Sistan and Baluchistan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 55-64
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  • 17
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25221 | 18721 | 2018-09-06 06:08:35 | 25221 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-16
    Description: The present investigation was undertaken to identify fish larva and estimate their abundance, diversity and evenness indices. Twelve stations were sampled monthly during daytime hours by Bongonet in the kharg and khargoo regions of Persian Gulf from January 2005 through December 2006. Forty family of fish larva were identified, Families of Silaginidae, Clupeoidea, Blenidae and Athrinidae consisted of more than 61 percent of all specimen; The abundance of specimen were more during spring through fall months and least during winter. The number and abundance of identified families varied from cruise to cruise and station to station; the average amount of diversity, Species Richness and evenness in investigated region were computed 1.93, 12 and 0.68, respectively. Temperature and salinity of water during this study were between 16-34°C and 35-42 gr/lit. There weren’t any significant correlation between fish larva indices and above factors.
    Keywords: Biology ; Iran ; Persian Gulf ; Kharg ; Dylam ; Diversity ; Abundance ; Ichtyoplankton ; Fish larvae ; Sample ; Silaginidae ; Clupeoidea ; Blenidae ; Athrinidae ; Specimen ; Species ; Temperature ; Salinity ; Coastal waters
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 140
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  • 18
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25717 | 18721 | 2018-10-14 03:16:05 | 25717 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-16
    Description: Caspian Sea with an area of 400 thousand square kilometers is the largest lake in the world. The Caspian Sea about 1200 km from north to south on the longest section and an average width of 320 km. Along the coastline around the Caspian Sea is about 6500 kilometers. Caspian Sea is about 78,000 cubic kilometers of water volume that is 44% of stocks of blue lakes around the world. Caspian Sea basin, which is composed of seven major basins of the main watershed from west to east are: juniper, Talsh- Anzali, large Sefidrood between Haraz Sefid and, Hraz- Gharehsou, Nagorno Sv- Gorgan and Atrak in the basin of Aras no limits to the beach. Aras sub-basin is located in the North West and Iran, the second largest sub-basin of the Caspian Sea. Talysh-Anzali on the Caspian Sea basin West and the seventh largest sub-basin of the Caspian Sea. White basin is located in the South East of the Caspian Sea and the extent of the sub-basin of the Caspian Sea. Haraz located in the south Caspian Sea basin and the ninth largest sub-basin of the Caspian Sea. Gorgan is located in the South East of the Caspian Sea basin and the fourth largest sub-basin of the Caspian Sea. In these areas, about 28 percent of the total fish production in the northern waters of aquatic allocated.
    Keywords: Fisheries ; Management ; Iran ; Northern Alborz ; Environmental ; Ecological ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 58
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  • 19
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    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25761 | 18721 | 2018-10-13 07:28:49 | 25761 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-16
    Description: Coastal areas with about 3700 kilometers of border land and sea, in the north, south and around the islands of the country, one of the potential environmental capacity are economic planning. The coastal area of both the ecological and economic importance. The most important reasons such as marine coastal area of high biodiversity, economic and commercial values, the values of research, mines and aesthetic and recreational values can be cited. Combining development with conservation of natural resources through careful planning based on the principles of sustainable development, one of the objectives of the Coastal Zone Management. Integrated management plan for coastal areas, based on zoning study area into three regions, areas managed by the Department of Environment, Cultural Heritage and Tourism Organization management areas and sensitive habitats within the coastal area have been made. After identify each area as a first step to study the problems of the zone (threat Threats), due to management problems (weaknesses Weaknesses), the facilities available in each area (opportunities Opportunities) and the management strengths (Strengths) each region based on the SWOT model, planning will be discussed. Considering the unique ecological values of coastal ecosystems, the operational objectives of the comprehensive program given the country's Fourth Development Plan, IUCN guidelines and other rules and regulations were extracted.
    Keywords: Ecology ; Iran ; Persian Gulf ; Caspian Sea ; Oman Sea ; Coastal Zone ; ICZM ; Integrated Coastal Zone Management
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 38
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  • 20
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    In:  http://aquaticcommons.org/id/eprint/21999 | 18721 | 2018-01-21 12:02:17 | 21999 | Iranian Fisheries Science Research Institute
    Publication Date: 2021-07-06
    Description: The survey of fish larvae assemblage variation was done in 2013 seasonally at the coastal areas of Southeastern side of Chabahar Bay. Sampling was done in 3 stations at day and night periods by a Bongo-Net with 300µ of mesh size. 29 families were identified. Clupeidae, Gobiidae and Blenniidae were dominant with more than 50% relative abundance. The PCA result was shown there were two separated groups among day and night fish larval assemblages. Blenniidae ،Scombridae and Clupeidae in day times, Clupeidae ،Gobiidae and Sparidae in night times were more dominant among different families. Station 1 had more fish larvae abundance in autumn in nights and days (54.77 and 79.67 larvae per 10 meter). The average of Shannon index was (0.54 ±0.88 and 0.63± 0.97) in days and nights respectively.Significant increase of larval abundance at station 3 in nights could be due to reduced vessel traffic.
    Keywords: Biology ; Fisheries ; Fish ; larvae ; Abundance ; Diversity ; Chabahar Bay ; Iran ; Blenniidae ; Scombridae ; Clupeidae
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 123-130
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