S. Jamili | Islamic Azad University, Science and Research Branch (original) (raw)

Papers by S. Jamili

The annual reproductive cycle of peal oyster Pinctada fucata was characteised by documenting gona... more The annual reproductive cycle of peal oyster Pinctada fucata was characteised by documenting gonadal development and changes in serum levels of estradiol-17b (E2), testosterone (T) and progesterone (P) in the wild bivalve caught in natural beds in the Persian Gulf throughout the year. Bivalve populations employed in this study spawn in June-July and November-December. The pearl oysters had group synchronous ovarian development with exogenous vitellogenesis during spring and summer for first spawning and during August-September for the second spawning. Serum E2 levels in the females increased rapidly from low values in May to peak in June and also in October coinciding with the time of spawning. Serum T levels in male and female exhibited a bimodal pattern. However in the male it increased during the early spermatogenesis. P was detected in both females and males. Its concentrations start to increase during the early gametogenesis and reaching to peak during the spawning season. The ...

Iranian Journal of Fisheries Sciences, 1999

Journal of Survey in Fisheries Sciences, 2020

Population parameters were estimated for goatfish (Upeneus sulphureus, Cuvier, 1829) as a small s... more Population parameters were estimated for goatfish (Upeneus sulphureus, Cuvier, 1829) as a small size and abundant species in the Persian Gulf ecosystem. A method of Tropfish R package based on length frequencies analysis was used. A total of 520 fish samples were taken monthly from landing stations in the coastal area of Iranian Waters in the Persian Gulf (Bushehr coasts) from January 2017 to December 2018. The length (FL) of the captured fishes varied from 8.5 to 17 cm with an average (±SD) of 11.20 (±2.24) cm. The values of the von Bertalanffy growth function fit length frequency data for U. sulphureus (combined sex) were estimated, as k = 1.2 per year, L∞ =19.43 cm (LF). Total, natural and fishing mortality calculated, as Z=3.74 per year, M=2.21 per year and F=1.53 per year, respectively. The exploitation ratio (E) was estimated at 0.4. The length-weight relationships of both sexes was estimated as, Log =-1.707+3.00 log (r = 0.92) which exhibited positive isometric growth. According to results, it could be concluded that goatfish (Upeneus sulphreus) is a relatively fast-growing and short-lived species. Although this species is not a direct target of fishermen, its ecological role in the Persian Gulf's food web due to their high abundance and high growth rate is undeniable.

Iranian Journal of Fisheries Sciences, 2017

Survey on zooplankton composition was studied during June 2015 to March 2016, by selecting six st... more 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/m 3 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 Sag...

Nemipterid fishes are considered as one of the commercial fish family having considerable catch a... more Nemipterid fishes are considered as one of the commercial fish family having considerable catch amount in the Persian Gulf and Oman Sea. There was an annual monitoring survey during 2003-2013 in the Oman Sea using a research bottom trawler for stock assessment purposes. The whole area was stratified into five strata (or sub region) and four depth layers of 10-20, 20-30, 30-50, 50-100 m. The results showed that the best fishing ground for this family were both in western and eastern study area of the Oman Sea, Sistan-o-Baluchistan Province. Amongst five classified sub regions, the Meidani, Galak, Rabech and Biahi in the western part showing the most density with CPUA value of 293.7 kg/km 2 . A comparison between different covered depth layers, it was found that the highest CPUA (331.2 kg/km 2 ) belonged to the depths more than 30 m and with decreasing depth there was a descending trend in catch per unit area value with the lowest value for 10-20 m depths (28.6 kg/km 2 ). This 10 year...

Iranian Journal of Fisheries Sciences, 2013

The histopathological effects of Linear Alkylbenzene Sulfonate on the gill, liver and kidney tiss... more The histopathological effects of Linear Alkylbenzene Sulfonate on the gill, liver and kidney tissues of the Caspian kutum, Rutilus frisii kutum were studied. The fish were exposed to three sublethal concentrations of anionic detergent, Linear Alkylbenzene Sulfonate (LAS) for short term intervals (192 h). Gill, liver and kidney samples were collected after 192 h of exposure to LAS and lesions were analyzed by light microscopy. The histological changes to gills were edema, fusion of lamellae and lamellar aneurism. Some alterations like reduction of the interstitial haematopoietic tissue, tubular shrinkage, degeneration in the epithelial cells of renal tubule and necrosis were observed in the kidney. In the liver tissue, hepatocyte degeneration, congestion and dilation of sinusoid and vacuolar degeneration were seen. It seems that sublethal concentration of LAS may affect sever changes to gill, kidney and liver of R. frisii kutum specimens that leads to malfunction of these organs whic...

This study is attempted to compare the number of rings and circular scales that are formed during... more This study is attempted to compare the number of rings and circular scales that are formed during various ages on Liza saliens. Sampling was carried out monthly during 2012-2013 using beach sine fishing nets. 102 specimens of different sizes were collected and transferred to the laboratory in boxes containing ice. The age of fish was determined by the number of annual rings as well as, the number of rings in each annual area. The distance between rings in each annual area was also measured. The results showed that the maximum growth was demonstrated in the first and second years. In the first year of life, the scale radius was nearly 2823.3±366.5(μm) which decreased to 1223.9±236.0(μm). The result indicated that 48 percentage of growth scales occurred in the first year and this value is only 21.8% in the second year. The number of growth rings in the annual regions decreased with increase in age. The result demonstrated that the average number of rings was 95.5±17.6 in the first lif...

Regenerative Therapy, 2021

Background: The present study focused on burning as one of the main causes of mortality with detr... more Background: The present study focused on burning as one of the main causes of mortality with detrimental economic and social effects in the world. The purpose of this study was to investigate the impact of collagen-chitosan gel extracted from Scomberomorus guttatus and shrimp skin in the treatment of second degree burn healing among rats. Materials & method: To fulfill the purpose of the study, chitosan and collagen were extracted respectively from shrimp and Scomberomorus guttatus skin waste by the acid-based method and were evaluated by using Pico Tag, SDS-PAGE. The burn wound healing efficiency of marine collagen-chitosan gel was examined in vivo using rats. Three different ratios of collagen and chitosan blend (Col-CH, 1:3, 1:1 and 3:1) were prepared to obtain the most effective Col-CH gel for burn wound healing and were compared to the animals treated with silver sulfadiazine ointment. Healing burn wound was studied by measuring wound surface area with Image J and histopathologic examination was carried out based on the mean of epithelialization, fibroblastic cells, acute and chronic inflammatory cells, angiogenesis, structure collagen and the amount of collagen on days 15 and 25 post-burn. Results: The results of SDS-PAGE indicated that the extracted collagen was type I and it was composed of two a (a 1 and a 2) chains. Amino acid analysis showed a much higher glaycin content in extracted collagen which amounted to one-third of the total amino. The wound surface measurement showed a significant reduction in wound size in the group treated with Col-CH (3:1) compared to silversulfadiazine treated group on 15th and 25th days. Histopathological findings represented a high score in epithelialization, collagen, collagen structure, fibroblast cell and a decrease in inflammatory cells infiltration in Col-CH (3:1) treated group on 25th day. The most obvious finding of the present study is

Cell Biochemistry and Biophysics, 2011

Hemoglobin (Hb) variability is a commonly used index of phylogenetic differentiation and molecula... more Hemoglobin (Hb) variability is a commonly used index of phylogenetic differentiation and molecular adaptation in fish enabling them to adapt to different ecological conditions. In this study, the characteristics of Hbs from two Sturgeon species of the Southern Caspian Sea Basin were investigated. After extraction and separation of hemoglobin from whole blood, the polyacrylamide gel electrophoresis (SDS-PAGE), cellulose acetate electrophoresis, and isoelectric focusing (IEF) were used to confirm Hb variabilities in these fishes. We showed that although both species have variable Hbs with different isoelectric points, their dominant Hbs can be identified. Ion exchange on CM-cellulose chromatography was used for purification of the dominant Hbs from these fishes. The accuracy of the methods was confirmed by IEF and SDS-PAGE. Spectral studies using fluorescence spectrophotometery indicated that although the Hbs from these fishes had similar properties they exhibited clear differences with human Hb. A comparative study of Hbs alpha-helix secondary substructures was performed by circular dichroism spectropolarimetry (CD) analysis. UV-vis spectrophotometery was also utilized to measure oxygen affinity of Hbs by sodium dithionite. Oxygen affinities of these Hbs were compared using Hb-oxygen dissociation curves. Together, these results demonstrate a significant relationship between oxygen affinity of fish hemoglobins and environmental partial pressure of oxygen.

Journal of Fisheries and Aquatic Science, 2010

Methyl Tert-Butyl Ether(MTBE) increases oxygen consumption and reduces carbon monoxide and also a... more Methyl Tert-Butyl Ether(MTBE) increases oxygen consumption and reduces carbon monoxide and also air pollution. It is very active in soil, and its motility in water is a function of water movement in soil. MTBE is resistant to biodegradation, with high half-life and solubility in water and weak absorption in soil particles. The activities of SOD and CAT enzymes were examined in Rutilus caspicus in concentrations of 50, 100 and 150 mg L-1 MTBE for 7, 14 and 21 days. The mean water temperature and oxygen were 191°C and 7.60.2 respectively and salinity was maintained zero. 156 R. caspicus were stocked in aquariums, 3 specimens were randomly selected from aquarium in the first, second and third weeks. Blood serum was separated to assay the SOD and CAT activities. A strong significant positive relationship was found between MTBE concentration and SOD as well as CAT: [r(108)=0.73, P < 0.01]. Elevated MTBE increased the activity of SOD and CAT. In addition, there was a mean significant p...

Khark and Kharko Islands are located at far northern point of fringing coral reefs in the Iranian... more Khark and Kharko Islands are located at far northern point of fringing coral reefs in the Iranian coast of the Persian Gulf. These coralline are the habitats of the wildlife refuge with total area of 2400ha and located in the territory of Bushehr province. The present study was carried out from July 2006 to June 2007 over 12 stations. Sampling was conducted obliquely from bottom using Bongo-net plankton sampler with 500µ of mesh size. In total, 1808 specimens, both in pre and post flexion stages were collected and examined. They were belonging to 45 families from different ecological groups (21 coralline and 24 non coralline fish larvae families). 96% of examined fish larvae were in preflexion stage. Some families are new ones from the area. Among identified families, Clupeidae, Blenniidae, Sillaginidae, Atherinidae and Tripterygiidae; were dominant families in studied area and the peaks were estimated in spring. The mean abundance of total fish larvae was 18.71 per 10m² of sea surf...

Cybium: international journal of ichthyology

The population dynamic parameters of Vimba vimba persa (Pallas, 1811) were investigated from 994 ... more The population dynamic parameters of Vimba vimba persa (Pallas, 1811) were investigated from 994 specimens collected in the iranian waters of the Caspian sea from october 2008 to september 2009. Fork length ranged from 9.5 to 23.4 cm. Von Bertalanffy growth parameters from size-at-age data are: L∞ = 26.1 cm, K = 0.28 yr -1 , to = -0.65. The length-weight relationship coefficient b for males (b = 3.128) was higher than that for females (b = 2.971). The oldest fish was 5 years old. Sex ratio was 1:1.35 (n = 935) with females predominating. Using the catch curve method, the instantaneous coefficient of total mortality Z was estimated as 1.07 yr -1 . The instantaneous coefficient of natural and fishing mortality m and F were 0.58 and 0.49 yr -1 , respectively. The current exploitation ratio E = 0.46 indicated that the population seems to be highly exploited, and probably not at a sustainable level.

Iranian Journal of Fisheries Sciences

Some reproduction characteristics of the Caspian Vimba, Vimba vimba persa, were studied from

Planta Medica, 2013

ABSTRACT Among marine organisms, algae are a large and diverse group of organisms from which a wi... more ABSTRACT Among marine organisms, algae are a large and diverse group of organisms from which a wide range of secondary metabolites have been isolated. A number of these compounds possess biological activity such as toxicity, antibacterial, antifungal, antiviral, anti-tumor, anti diabetic and other specific activities (1 - 3). Padina boergesenii (Allander and Kraft) is the most abundant algae distributed in the Persian Gulf. In this study the Ferric Reducing Ability of Plasma (FRAP) activity and hypoglycemic effect was determined. methanol extract from P. boergesenii showed a considerable antioxidant effect 145.5µ mol/lit (concentration of extract used = 20 mg/ml)and also higher inhibitory activity than the positive control against α-amylase. The IC50 value of P. boergesenii methanolic extract againstα-amylase was 0.29 mg/ml. (Concentrations: 0.05, 0.1, 0.25, 0.5 mg/ml). Acarbose (IC50 = 0.53 mg/ml) was used as a positive control. Antioxidant and antidiabetic activity might be due to the presence of carotenoid, sterol, fucoxanthin, active phenolic compounds, and monoterpenes in the extracts.

Cell Biochemistry and Biophysics, 2012

ABSTRACT The multiplicity of the Hemoglobins (Hbs) of the and the A. stellatus, two species from ... more ABSTRACT The multiplicity of the Hemoglobins (Hbs) of the and the A. stellatus, two species from the Caspian Sea, A.persicus was confirmed with the polyacrylamide gel electrophoresis (SDSPAGE), cellulose acetate electrophoresis, and isoelectric focusing (IEF) experiments. In the current study, the interaction of ndodecyl trimethylammonium bromide (DTAB) as a cationic surfactant under variable concentrations, with the purified dominant Hbs was investigated using UV-visible absorption spectra and circular dichroism (CD). The chemometric resolution techniques were used to determining the number of the components and mole fraction of the oxidized Hbs. The analysis of the obtained spectral data using singular value decomposition (SVD), evolving factor analysis (EFA) and multivariate curve resolution-alternative least square (MCR-ALS) as well-known chemometrical techniques, gave the evidence for the existence of four different molecular components including native (N), intermediate (I), intermediate (II) and denatured (D) in sturgeon Hbs. On the basis of the interpretation of chemometrical results, the formation of intermediate states of fish Hbs, plays an important role for regulation of the respiratory system of the fishes proportional to their habitat depths and environmental partial pressure of oxygen.