e s; a s; sm gh
Volume 12, Issue 1 , April 2013, Pages 3-11
Mehrnoush Norouzi; Ali Nazemi; Fatemeh Daneshvar; Mohammad Hadi Samiei
Volume 12, Issue 1 , April 2013, Pages 11-20
Abstract
Common kilka, Clupeonella cultriventris is an economic fish in Caspian sea and we investigate population genetic structure of common kilka in the South Caspian Sea costline (Mazandaran province) using microsatellite markers. Totally, 60 individuals of adult common kilka from two seasons were sampled. ...
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Common kilka, Clupeonella cultriventris is an economic fish in Caspian sea and we investigate population genetic structure of common kilka in the South Caspian Sea costline (Mazandaran province) using microsatellite markers. Totally, 60 individuals of adult common kilka from two seasons were sampled. Eight sets of microsatellite primers were developed from American shad and Pacific herring tested on genomic DNA of common kilka. At this point only the five successfully used primer sets and were used to analyze the genetic variation in adultsof the common kilka population. Analyses revealed that average of alleles per locus was 11.7 (Na range 6 to 17 alleles per locus). Both of sampled seasons contained private alleles. Average observed and expected heterozygosity were 0.543 and 0.866 respectively. Deviations from Hardy-Weinberg equilibrium were in most cases (P<0.01). Basis on AMOVA for both FST values among pairs them indicated a significant difference between the two seasons (P≤0.01). These results support the existence of different genetic populations along the South Caspian Sea costline (Mazandaran province) in different seasons.
Amir Jaferian; Hosein Zolgharnein; Mehdi Mohammadi; Mohammad Ali Salari Ali Abadi; Seyyed Javad Hoseini
Volume 12, Issue 1 , April 2013, Pages 29-37
Abstract
Fourfinger Threadfin in shallow coastal waters with sandy or muddy bottom and into the lives of the rivers. The fish in the coastal areas of tropical and subtropical areas of the environment. The family of 7 genera and 35 species have been identified in the warm waters. Persian Gulf fish are apart from ...
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Fourfinger Threadfin in shallow coastal waters with sandy or muddy bottom and into the lives of the rivers. The fish in the coastal areas of tropical and subtropical areas of the environment. The family of 7 genera and 35 species have been identified in the warm waters. Persian Gulf fish are apart from the economic elite. Sampled using boats equipped with fishing hooks gill net and sometimes in the Persian Gulf was. And was amplified using the number six position. The highest number of alleles observed in the samples and place Eletet2 Bushehr (5 alleles) and the lowest in the province is the place Eletet16.0 and the samples (one allele). Ho Eletet16.0 samples collected in the range of the lowest position of the province and the province is the highest position Eletet16.0. Shannon index Eletet2 highest position in the province) 1.494 (and its lowest position in the province Eletet17 (0.637) is. AMOVA tests based on risk level 0.01 differences between samples (%76), the difference between the groups (regions) (%0), differences between regions (%24) was calculated. similar genetic criteria Nei, (1972) The province of Khuzestan and Bushehr specimens (0.486) and genetic distance between samples of Khuzestan and Bushehr (0.615) exists. In the present study, heterozygosity at the highest position in the province of Bushehr is Eletet2. The highest observed heterozygosity (Ho), 0.923 is the position Eletet16.0 and Bushehr specimens. The amount of heterozygosity observed in this study is more indicative of the amount expected heterozygosity genetic variability due to fish migration in the near and far and free access to water (high gene flow) is. The results suggest that it is probably a fish population in the areas of Fourfinger Threadfin conventional fisheries management perspective there is any, is the same.
m m; m a; m s; s m; i s; h d
Volume 12, Issue 1 , April 2013, Pages 38-49
Rouhollah Zare; Seyyed Mohammad Bagher Nabavi; Mahdieh Eftekhar Vaghefi
Volume 12, Issue 1 , April 2013, Pages 49-56
Abstract
Nest site location in reptiles is an important stage of their life cycle because environmental factors influence embryo survivorship, incubation quality and sex ratio. For studying effective factors on nest site location in the hawksbill turtle, we measured temperature, moisture, beach slope, particle ...
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Nest site location in reptiles is an important stage of their life cycle because environmental factors influence embryo survivorship, incubation quality and sex ratio. For studying effective factors on nest site location in the hawksbill turtle, we measured temperature, moisture, beach slope, particle size of sand and vegetation related to 35 nests in Shidvar Island. In this Island, most nests were in northern beach which has a relatively steep slope. In this slope energy costs and probability of females and hatchlings predation is low. In addition hawksbills preferred to nest amongst vegetation. Of the environmental evaluated, slope appears to have the greatest influence on nest site location, because it is associated with nest elevation and hatching success is higher from nests closest to suitable elevation. It is believed that sea turtles may use multiple cues for nest site location and use a threshold that must be reached for each environmental factor before the turtle initiates nest excavation.
Mehrnaz Shirmohammadi; Babak Doustshenas; Simin Dehghan Mediseh; Ahmad Savari; Nasrin Sakhaei
Volume 12, Issue 1 , April 2013, Pages 59-66
Abstract
The study took place to survey the changes in diversity and distribution of Polychaetes in fishing area of Bahrakan, due to the trawling. Sampling was taken before (15 May) of trawling and two weeks (5 Sep) and three months (14 Nov) after trawling in 2010, in three period in Bahrakan coast. Therefore, ...
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The study took place to survey the changes in diversity and distribution of Polychaetes in fishing area of Bahrakan, due to the trawling. Sampling was taken before (15 May) of trawling and two weeks (5 Sep) and three months (14 Nov) after trawling in 2010, in three period in Bahrakan coast. Therefore, eighteen stations placed with the depth of 6 meters and 10 meters.The amount abundance Polychaetes had decreased significantlyin both depths two weeks after trawling (P<0.05). Also in 6m depth, no significant difference was observed between abundance Polychaetes in two weeks and three months after the trawling (p>0.05). Only in 10m depth, abundance Polychaetes after three months comparing to two weeks after trawling had increased significantly (p<0.05). Changing biomass Polychaetes was similar to Changing abundance. After the trawling, small size individuals became dominant.Abundance Species ofCossura longicirrattahad increased in both depths in two weeks after the trawling. Also in both depths, Shannon Diversity and Margalef Species Richness indices showedprocess decreasing and Simpson dominant Index showedprocess increasing. In both depths, Pielou Evenness Index two after trawling had increased. While, after three months comparing to two weeks after trawling had decreased and most effects of trawling were on 6m depth.
Mohammad Hossein Khanjani; Omidvar Farhadian; Yazdan Keivany; Eisa Ebrahimi
Volume 12, Issue 1 , April 2013, Pages 67-76
Abstract
The most important factors controlling cladocerans production, growth, and morphometric characters are temperature, food quantity and quality and photoperiod. Effects of temperature and photoperiod on production, and morphometric characters of cladoceran, Ceriodaphnia quadrangular, were examined by culturing ...
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The most important factors controlling cladocerans production, growth, and morphometric characters are temperature, food quantity and quality and photoperiod. Effects of temperature and photoperiod on production, and morphometric characters of cladoceran, Ceriodaphnia quadrangular, were examined by culturing on green algae Scenedesmus quadricauda in 250 ml conical flasks (150 ml water). Treatments used for temperature (˚C)and photoperiod (light hours:dark hours) were 20,25,30 (˚C) and 12:12,24:0 and 0:24, respectively. The maximum population density (5.51 ind./ml) obtained at 24:0 and 30 (˚C), while maximum body length (731 µm) and maximum body width (491 µm) obtained at 0:24 and 20 (˚C). Correspondingly, the maximum adult (61 %), maximum neonate (39 %) and young (9 %) in population under culture conditions of 0:24, 12:12,24:0 (L: D) and 20 (˚C) obtained, respectively. Overall, this research showed that growth and reproduction of Ceriodaphniaquadrangula gave better performance at 25 (˚C)and 24:0, light: dark photoperiod.
Esmaeil Karami; Mirmasoud Sajjadi; Mohammad Amin Soltani; Abdolrasoul Daryaei
Volume 12, Issue 1 , April 2013, Pages 80-90
Abstract
This study was conducted to investigate the effect of initial stocking density of red algae Gracilaropsis persica and Gracilariacorticata on the growth and biomass production of these species. Three stocking densities of 50 gm-1, 125 gm-1 and 200 gm-1 were used and algae cultivated in Persian Gulf (Bandar ...
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This study was conducted to investigate the effect of initial stocking density of red algae Gracilaropsis persica and Gracilariacorticata on the growth and biomass production of these species. Three stocking densities of 50 gm-1, 125 gm-1 and 200 gm-1 were used and algae cultivated in Persian Gulf (Bandar Abbas) in winter for 45 days. Algae collected from natural environment and cultivated on poly ethylene rope in the sea.Relative growth rate (RGR) and total biomass were measured fortnightly. Temperature, salinity, pH and nutrients (nitrate, nitrite and phosphate) were measured during the trial. The result of the present study showed that there were significant differences in growth rate between different treatments in both species (P<0.05). Algae that cultivated with 50 gm-1 initial stocking density had the highest relative growth rate in both species. At the end of 45-day trial, total biomass was the highest in 200 gm-1 treatment (P<0.05). Furthermore, the present study showed that the growth rate of Gracilariopsis persica was higher than Gracilariacorticata. The results of the present study showed that stocking density is able to affect the growth of red algae Gracilariopsis persica and Gracilariacorticata and Gracilariopsis persica have higher growth rate and better potential of commercial culture in the Persian Gulf compared to Gracilariacorticata.
Samaneh Poursaeid; Bahram Falahatkar; Bagher Mojazi Amiri
Volume 12, Issue 1 , April 2013, Pages 90-105
Abstract
The objective of this study was to examine the effects of triiodothyronine (T3) implantation on the performance of physiology of cultured great sturgeon (Huso huso). Three treatments with 5 fish for each treatment were considered. The experimental treatments included: control (capsules containing cocoa ...
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The objective of this study was to examine the effects of triiodothyronine (T3) implantation on the performance of physiology of cultured great sturgeon (Huso huso). Three treatments with 5 fish for each treatment were considered. The experimental treatments included: control (capsules containing cocoa butter alone), low level of T3 (T1; 1 mg T3/kg body weight + cocoa butter), and high level of T3 (T10; 10 mg T3/kg body weight+ cocoa butter). The capsules containing hormones and cocoa butter were intraperitoneally implanted to 3-year-old pre-vitellogenic stage female fish (mean initial body weight 6999.7±100.9 g) every 6 weeks over a six month period from January 2009 to June 2010. The serum levels of some hormone (T3, cortisol, ACTH) and biochemical parameters (glucose, cholesterol and calcium) were determined at the initial time and three weeks after each implantation. Growth indices (WG, SGR and CF) were determined at the end of the experiment. The results showed that fish treated with the high and low T3 doses produced significant changes in thyroid hormone levels (P<0.05). Serum cortisol was significantly higher in T3- implanted fish than in control fish (P<0.05). Serum glucose and calcium concentrations were significantly greater in fish treated with the high T3 doses compared to the other two experimental groups (P<0.05). Significant differences were observed in serum ACTH and cholesterol concentrations among treatments in the last and second sampling time, respectively (P<0.05). Final weight was the highest in T1-implanted fish; intermediate in those implanted the high T3 dose, and lowest in controls (P<0.05). These results indicated that the long-term implantations of T3 hormone influence the physiological parameters of great sturgeon and promote the somatic growth in a physiological dose.
Mehdi Bolouki; SMohammad Bagher Nabavi; Ahmad Savari; Ehsan Tavasolpor; Monir Haghighat
Volume 12, Issue 1 , April 2013, Pages 106-113
Abstract
Coral reefs which are one of the most significant marine ecosystems have symbiosis with zooxanthella for their growth and survival. Today zooxanthella and coral symbiosis is in the danger of anthropogenic and global climate changes. A better understanding of the mitosis cycle of the cell in symbiotic ...
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Coral reefs which are one of the most significant marine ecosystems have symbiosis with zooxanthella for their growth and survival. Today zooxanthella and coral symbiosis is in the danger of anthropogenic and global climate changes. A better understanding of the mitosis cycle of the cell in symbiotic algae leads to a quantitative assessment of stress in corals and a clear presentation of the effect of the relationship between mitotic division and pollutants. To conduct this study in the first investigation, the best concentration of live coral reefs was selected by using Manta Tow method. The coral sampling of the region was conducted by scuba diving from dominant genus of the region through one year in three seasons including cold, moderate and warm season. By extracting zooxanthella with air brush machine, counting the dividing zooxanthella under microscope and forming a simple proportion to the total counted zooxanthella mitotic index was obtained. Eventually it was determined that mitotic index has significant alteration between warm and cold season with moderate season.
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.