علوم زیستی دریا
Zahra Yarahmadi; Bita Archangi; Ahmad Savari; Mohammad Bagher Nabavi
Abstract
The objective of this study was to morphological description and phylogenetic study of Ornithocercus magnificus in Bandar Abbas waters. The genus Ornithocercus is a heterotrophic dinoflagellate of the family Dinophysaceae. The samples were collected using a phytoplankton net (mesh size: 20 µm) ...
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The objective of this study was to morphological description and phylogenetic study of Ornithocercus magnificus in Bandar Abbas waters. The genus Ornithocercus is a heterotrophic dinoflagellate of the family Dinophysaceae. The samples were collected using a phytoplankton net (mesh size: 20 µm) equipped with a flowmeter in surface waters. The plankton samples were scanned and identified with an inverted microscope. Then, the SSU rDNA gene fragment from individual cells have been amplified using the polymerase chain reaction and sequenced for the Iranian strain of this species. Phylogenetic analyzes were performed by Maximum Likelihood (ML) and Maximum parsimony (MP) methods. In this study, two new sequences of SSU rDNA from O. magnificus were reported for the first time and deposited in the GenBank. Morphological studies showed that the isolated cells from Iranian water were O. magnificus. Generally, the results showed; the morphological results of O. magnificus were matched with the molecular results of this study. Phylogenetic analysis grouped isolated Iranian sequences with O. magnificus and formed a monophyletic clad with other members of this genus as sister groups. The genus Histioneis is the closest relative to Ornithocercus.
علوم زیستی دریا
N Nozarpour; M.B Nabavi; Ronagh M.T Ronagh; B Archangi; N Sakhai
Abstract
In this study, the molecular characteristics of Chiromantes boulengeri in 2014 from intertidal waters of Arvand River in the vicinity of Minoo island were investigated. So, in October 2014 specimens from intertidal of two area of Minoo island were collected and preserved in 70% ethanol, carried out to ...
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In this study, the molecular characteristics of Chiromantes boulengeri in 2014 from intertidal waters of Arvand River in the vicinity of Minoo island were investigated. So, in October 2014 specimens from intertidal of two area of Minoo island were collected and preserved in 70% ethanol, carried out to the khoramshahr University of Marine Science and Technology laboratory and examined. To fulfill the purpose, To extract the DNA, phenol- chloroform method were used and mitochondrial gene 16S rRNA was sequenced and compare with other species from GenBank NCBI. The morphological and phylogeny sequencing results showed that all specimens belong to Chiromantes boulengeri in the study area. By polymorphism analysis, there are mutation within C. boulengeri from two area of Arvand River and it seems that this species for its survival has adapted with different ecological conditions in the study area.
علوم زیستی دریا
Haleh Ali Abedi; Seied Mohammad Bagher Nabavi; Babak Dustshenas; Ahmad Savari; Mohammad Sharif Ranjbar
Abstract
To investigate some bioecological parameters of dolphins between Qeshm and Hengam Islands waters, the present field study was started on November 2014 and finished on may 2015. During this study morphological features of individuals, within dolphin groups, distribution and reproduction of the Indo-Pacific ...
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To investigate some bioecological parameters of dolphins between Qeshm and Hengam Islands waters, the present field study was started on November 2014 and finished on may 2015. During this study morphological features of individuals, within dolphin groups, distribution and reproduction of the Indo-Pacific Bottlenose dolphin (Tursiops aduncus) and their activities at the sea surface were registered using camera systems. At the same time a field questioner form was design to collect the local fisherman informations regarding to dolphins behaviors in the region. During this study one dolphin species namely Tursiops aduncus (Indo-Pacific Bottlenose Dolphin) was identified. The breeding period of Indo-Pacific Bottlenose dolphin was in spring season and a newborns were observed in April 2015. According to field observations, the mean number of Indo-pacific Bottlenose dolphin groups was 23/13±5/49 with 2 newborns in April 2015.Key words: Indo-pacific bottlenose dolphins, Bioecological parameters, Persian Gulf, Qeshm Island, Hengam Island.
Arash Shakouri; Seyed Mohamad Bagher Nabavi; Preeta Kochanian; Ahmad Savari; Alireza Safahiye
Volume 12, Issue 3 , September 2014, , Pages 51-62
Abstract
Considering the importance of environmental factors on marine organisms, a survey of factors that affect the subtidal sea cucumber community was carried out in the eastern part of Chabahar Bay, a region with anthropogenic effects on marine ecosystem, from May 2007 to July 2008. Four quadrates with ...
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Considering the importance of environmental factors on marine organisms, a survey of factors that affect the subtidal sea cucumber community was carried out in the eastern part of Chabahar Bay, a region with anthropogenic effects on marine ecosystem, from May 2007 to July 2008. Four quadrates with 100m2 area were sampled with SCUBA diving method in each region. Temperature had significant variation among the stations and seasons. There is a positive correlation (99%) between salinity and sea cucumber density and a negative correlation (95%) between turbidity and density. PCA indicated that salinity, pH, turbidity and temperature had 82.78% of all variance of the environmental factors and other factors did not exhibit such a relation with sea cucumber dispersion. Northern stations (Sepah and Kalantary) were located in same category in Fall 2007 and Winter 2008. These stations had the least pH and the highest salinity and turbidity in Fall and the highest pH and the least turbidity in Winter. Southern stations (Beheshti and Hotel Daryai) located in the same category in summer and fall 2007. These stations had the most pH and the least salinity in the summer and the most temperature and turbidity in the fall.
Dara Mirzabagheri; Seyed Mohammad Bagher Nabavi; Alireza Mehvari; Kambiz Karami
Volume 12, Issue 3 , September 2014, , Pages 74-86
Abstract
A general description of distribution patterns of rocky shore cructacea along the Hormuz Island coasts is presented to provide the context for comparisons of distribution patterns of this intertidal organisms. In order to test if there was any variation in species distribution and abundance from upper ...
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A general description of distribution patterns of rocky shore cructacea along the Hormuz Island coasts is presented to provide the context for comparisons of distribution patterns of this intertidal organisms. In order to test if there was any variation in species distribution and abundance from upper to lower intertidal zone (littoral zone) along the entire rocky shores of the Hormuz Island, three main regions (west, south and south-eastern) were studied and 3 transects were sampled in each region. At each one of the 9 transects the shore was levelled and a general qualitative description was made, which also aided grouping of subsequent quantitative sampling. Photographs and slides were taken from the live specimens and then specimens were fixed in 4% formalin and transported to lab for analyses. The upper zone was characterized by the presence of Balanus amphitrite. The midlittoral zone was essentially dominated by Balanus amphitrite. The distribution patterns observed on the lower zone showed a similarity between rocky shores located in south and south-east of the Hormuz Island dominated by Elasmopus sp.. It has also provided important information on abundance and seasonal distribution of cructacea in rocky shores of the Hormuz Island. According to the results abundance of cructacea was markedly lower in Summer compared to Winter. In conclusion species of cructacea is prevailing and environmental conditions and bed is the main reason for high abundance of this class. Distribution of crustacean is mainly affected by prevailing environmental conditions and the substratum type.
Ahmad Shadi; Hosein Zolgharnein; MohamadAli Salari-aliabadi; Mohamad Bagher Nabavi; Mohamad Taghi Ronagh
Abstract
Using 5 microsatellite loci Sillago sp. From Hormozgan North Persian Gulf were investigated through 68 specimens in two stations: Minab(31 specimens) and Bandar Lengeh(38 specimens). DNA was extracted using modified CTAB(Hexadecyl trimethyl-ammonium bromide) protocol. 5-17 alleles were observed in 5 ...
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Using 5 microsatellite loci Sillago sp. From Hormozgan North Persian Gulf were investigated through 68 specimens in two stations: Minab(31 specimens) and Bandar Lengeh(38 specimens). DNA was extracted using modified CTAB(Hexadecyl trimethyl-ammonium bromide) protocol. 5-17 alleles were observed in 5 loci with 8.4 mean allelic frequency. Observed and expected heterozygosity values was calculated (0.115<Ho<0.792) ,(0.598<He<0.902) . Genetic distance and identity according to Nei was estimated 0.520 and 0.595 respectively which shows genetic distance of genus level. Significant deviation from Hardy-Weinberg equilibrium (p<0.001) was observed at all loci at two stations. Analysis of Molecular Variance(AMOVA) of Genetic differentiation index(Fst) revealed mean significant (p=0.001) differentiation between two studied regions and 3.90 gen flow. Despite low distance of two studied regions (180km) there are probably two distinct populations of Sillago sp. which should be considered in management efforts.
mohadeseh miri
Abstract
This study examined the effects of brine discharge from desalination plant Chabahar-Konarak on the sea environment were used to study polychata assemblage. Sediment samples were sampled from 7 stations in pre monsoon and post monsoon in year 2011 using by van veen grab (0/025m2) samplers that 5 stations ...
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This study examined the effects of brine discharge from desalination plant Chabahar-Konarak on the sea environment were used to study polychata assemblage. Sediment samples were sampled from 7 stations in pre monsoon and post monsoon in year 2011 using by van veen grab (0/025m2) samplers that 5 stations were around the discharge point and 2 station as controls. The results of the statistical analysis showed that the abundance and richness significances differences (P<0/05) between stations.The most and the lowest abundance of polychaetes were occurred in station 6 with 3666.62 and 2079.92 individuals per m2 in pre and post monsoon and in station1 in pre and post monsoon periods with 306.97 and 0 numbers in m2.The richness, diversity and evenness results indicated that the highest and the lowest values is observed in control stations 0.94, 1.07 and 0/67 in pre monsoon and station 1, zero in post monsoon. According to results, we observed different sensitivity of polychaete to brine discharges because abundance and ecological indices were decreased in stations near the discharges area comparing to control stations far from the brine discharges zone. The most frequancy family in this study was spionidae that it showed tolerance of this family to brine discharges. With monsoon occurrence of stress added to the study area where that the lowest abundance (0) in one station in post monsoon.
Seyed Mohammad Bagher Nabavi; Seyed Gholam Reza Mosapanah; Ebrahim Rajabzadeh Ghatramei; Babak Moghaddasi; Naser Mostafawi; Parvane Shokat; Seyede Nages Nabavi; Mahmoud Ghayyem Ashrafi
Volume 12, Issue 1 , April 2013, , Pages 114-122
Abstract
An identification study of ostracoda fauna was performed on 12 bottom sediment samples collected from the Makran (Oman) Sea at depths from 30 to 130 m using Van Veen Grab with 0.1 m2 area. At each station three sub-samples were collected using handy corer (6.15 cm2 area). A total of 80 species were identified ...
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An identification study of ostracoda fauna was performed on 12 bottom sediment samples collected from the Makran (Oman) Sea at depths from 30 to 130 m using Van Veen Grab with 0.1 m2 area. At each station three sub-samples were collected using handy corer (6.15 cm2 area). A total of 80 species were identified and their biogeographic distributions has been discussed. Nine species are described as new in the study area. In relation to faunas from other Indo-Pacific regions, the ostracoda fauna in the study area was moderately diverse and the majority of the species were represented. The fauna shows close affinities to those of the Red Sea and the Indo-Pacific region. Only one “cosmopolitan” species (Falsocythere terryi) is common to the Makran (Oman) region and the Mediterranean. All new specimens figured are deposited at the Micropalaoontological section of Senckenberg Museum (Frankfurt am Main) under catalogue numbers SMF Xe 22250-22556. The present study is a part of winter cruise 2006 results which has been held in Makran Sea and Persian Gulf (ROPME Sea Area) region. New species identified are following: Neonesidea paiki sp. Costa afriorientalis sp., Bosella hormuzensis sp., Quasibradleya pseudoandamanae sp., Microcythere crescentiformis sp., Paradoxostoma butticulum sp., P. curvirostrum sp., P. procerum sp., P. ensiformis sp.