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| Articles
by
S. Jamili |
Total Records (
27 ) for
S. Jamili |
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S. Sadeghi
,
M. Hedayati
and
S. Jamili
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Aim of this study was determination of sperms’ ATP content of golden grey mullet in different time, temperature and extenders. Caspian Sea Mugilidea is one of the most important fish of the sea fishery which nowadays is the predominant catches fish of the mentioned sea. The ATP content of mentioned fish sperm is an important index of fish fertility determination of the sample’s ATP concentration was done by ultra sensitive bioluminescence method. ATP content of sperms were determined at two different sampling temperature (10-12 and 18-20°C) and two different keeping temperature (4°C and room temperature) for 6 h and also ATP content assayed until 10 days storage in the three extender types (glycerol, 0.7 and 0.65% salt solution). Results of the present study showed that, ATP content of sperms, collected at 10-12°C was 74.04±7.22%, in comparison to 18-20°C. The ATP content of sperms during 6 h keeping at 4°C and room temperature were 90.26±0.91% and 17.17±1.49%, respectively. Determination of sperms’ ATP content after 5 days keeping in glycerol, 0.7 and 0.65% salt solution revealed that glycerol or 0.65% salt solution is better extender than 0.7% salt solution. But sperms which were kept in mentioned extenders for 10 days showed that glycerol was better than salt solutions based on sperm ATP content saving. Results revealed that, in order to save sperms’ ATP content of golden grey mullet, sampling at 18-20°C and keeping in glycerol as extender is recommended. |
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H. Ziaeian
,
S. Moini
and
S. Jamili
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Amino acid and Unsaturated Fatty Acid (UFA) contents of long tail tuna
(Thunnus tonggol) roe and their changes were investigated
during 9 months of frozen storage at -18°C. These analyses were performed
immediately after the freezing, then after 3rd, 6th and 9th months of
cold storage at -18°C. Numbers 10 poly unsaturated fatty acids (PUFAs)
and 8 monounsaturated fatty acids (MUFAs) were identified. After 9 months
of cold storage, these compounds reduced from 34.55 and 27.78% to 24.62
and 25.62%, respectively. The most abundant UFAs in the fresh and frozen
roes were C16:1, C18:1, C20:5(n-3), C22:5(n-3) and C22:6(n-3). The results
showed that n-3 and n-6 fatty acids in fresh roe were 32.75 and 1.61%,
respectively, which decreased to 23.41 and 1.09%, respectively, after
9 months of cold storage. The most abundant amino acids in long tail tuna
roe were lysine, histidine, aspartic acid and leucine. According to the
results, the amounts of Essential Amino Acids (EAA) and nonessential amino
acids (NE) were 104.78 and 75.61 mg g-1, respectively that
reduced to 78.25 and 61.40 mg g-1 at the end of storage period.
Moreover, the amino acid compositions for fresh roe showed a relatively
higher ratio of EAA/NE in comparison to frozen samples after 9 months
of cold storage. These ratios were 1.38 and 1.27, respectively. These
findings are showing that Thunnus tonggol can be a rich source
of n-3 fatty acids and Essential Amino Acids (EAA) for human health. |
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M. Chelemal
,
S. Jamili
and
I. Sharifpour
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To study the reproductive biology of Liza abu,
360 samples of this species were collected during the period from February
2007 to January 2008. Reproductive characteristics of Liza abu
showed that sex ratio is 1: 2.7 male to female, respectively. This means
that females predominate males. Monthly variation in GSI of both sexes
were quiet apparent. Maximum values were recorded in March (10.26 and
11.51% for males and females, respectively) and reached to the minimum
levels in August (0.42 and 1.15% for males and females, respectively).
These cyclic changes in GSI indices are considered as a proof that maturation
season is started from January and spawning occurs in April. The maturity
stages of male and female Liza abu are separated to 6 different
successive stages. These stages in female are immature, resting, developing,
developed, spawning (ripe) and post spawning. The testes maturation classified
to virgin (immature), maturing virgin, maturing virgin, developing, developed,
ripe and spent. The ova diameter ranged from 16.02 to 470.3 μ. It
can be classified into transparent eggs ranging from 16.02 to 106.97 μ
in diameter and yolked egg ranging from 126.82 to 470.3 μ in diameter. |
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A. Javanshir
,
M. Shapoori
and
S. Jamili
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Macro benthic invertebrate assemblages were investigated
monthly, from March 2006 to March 2007, at six stations in Tajan river
estuary, a south eastern Caspian Sea coastal estuary, in order to estimate
secondary production consumable for extensive finger fish releasing and
to investigate the factors affecting this production. Benthic assemblages
comprised 9 taxa, of which Ballanus sp., Chironomus plumosus
and Cerastoderma lamarki were the main contributors to both overall
biomass and secondary production. Annual secondary production varied from
4.55 g AFDW m-2 year-1 (Ash Free Dry Weight), in
the upper Tajan estuary, to 78.06 g AFDW m-2 year-1
(Ash Free Dry Weight) in the center of the estuary area. Multivariate
correlations between environmental variables and the Macro benthic assemblage
biomass highlighted the role of the water level, temperature, sediment
organic carbon content and dissolved oxygen in the differentiation of
the communities in the estuary. Composition, biomass and secondary annual
production of Macro benthic communities were dramatically affected by
changes in water residence time and summer drought crises. The isolation
of this habitat limits the recovery of other invertebrate benthic assemblages
during drought periods. Only populations of two species, Balanus sp.
and C. plumosus, seemed to be able to recover quickly after the
drought crises, which, in turn, could compromise the overall secondary
production, with negative effects on the released fish survival. During
summer water renewal, when agricultural activity is intense and nutrient
inputs should be regulated in this estuary to reduce the risk of benthic
mass mortality and to ensure a sustainability of this environment. |
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A.A. Motalebi
,
K. Ardalani
and
S. Jamili
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In the executed research on aquaculture diet in West
Azerbaijan Province coldwater fish propagation and culture farms, which
was accomplished by the kind cooperation and coordination of West Azerbaijan
Province aquaculture department, samples of feed were evaluated during
2 phases, one phase between spring and summer and another phase between
fall and winter, based on aflatoxin amount by HPLC technique. The feed
samples used in this research were from different factories and of various
kinds (SFT-FFT-GFT-BFT) and sizes. After the fulfilling of high performance
liquid chromatography (HPLC) and evaluation of the test results in accordance
with laboratory standards (the concentration was between 2-4 ppb). Result
of samples of the second stage, fall and winter were negative, but of
the samples of the first stage, spring and summer there were 5 positive
samples. The total concentration of toxin (B1, B2,
G1, G2) was between 1.21 to 6.62 ppb. The sample
has been concentration of 6.62 ppb highly exceeded the allowed level.
During these examinations, it was revealed that, the farms which had executed
the hygienic principals of stocking, showed lower levels of toxin in the
diet and vice versa. The toxin levels detected between spring and summer
are higher than those of fall and winter due to the high heat and humidity
of the warehouse. |
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S.A. Hosseini
,
S. Jamili
,
T. Valinassab
,
G. Vosoghi
and
S.M.R. Fatemi
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This study, being conducted in 2006-2007, attempts to
investigate its biological habit and characteristics in Iran`s water of
the Persian Gulf. For the sampling purpose, three major landings namely
Bushehr, Deylam and Genaveh were selected to obtain samples from commercial
catches. The sampling is composed of 655 males and 515 females during
a twelve month period. By studying the feeding through the counting method,
it is revealed that, Liza subviridis characterized by 42.8% and
Sepia pharaonis by 8.4% made the highest and lowest stomach content,
respectively. The findings showed that male fish in smaller size will
mature sooner than females specimen but this sex ratio or proportion was
not significantly different except during October and September. Such
a difference between male and female in different months could be originated
from longer residing of female group in spawning ground compared to male
group. The earlier spawning lasted during September-October and there
was a peak of spawning in feeding in August. The lowest fat proportion
for both male and female genders was reported 0.10 and 0.11, respectively
in October; but the highest level of condition factor was reported to
be 0.59 and 0.63 during November and June. |
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M.S. Sadeghi
,
F. Kaymaram
,
S. Jamili
,
M.R. Fatemi
and
M.S. Mortazavi
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Patterns of reproduction and spawning were studied for
the king fish (Scomberomorus commerson) in the Persian Gulf (Hormozgan
province). During one year of sampling, 599 fish were collected from different
landing sites along the Persian Gulf. Analysis of the reproductive stages
and gonadosomatic index revealed a single yearly reproductive cycle beginning
in March and ending with a single spawning period in August-September.
The mean length at first maturity (Lm 50%) for females was 75 cm. The
sex ratio was M/F = 0.97 in the samples. |
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M. Marjani
,
S. Jamili
,
P.G. Mostafavi
,
M. Ramin
and
A. Mashinchian
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In the present study, effect of different dose rates
of synthetic androgen 17-alpha Methyl Testosterone (MT) i.e., 50, 75 and
100 mg of hormone in per kg of feed, on sex reversal and growth performance
of Mozambique tilapia was evaluated. MT was administrated orally by using
pellet dry starter and Ethanol Alcohol, diet to tilapia fry for 21 days
in glass aquaria. The fry were also kept for 2 weeks after feeding to
monitor its growth performance. At the end of the experiment the sex ratio
was determined by examining the gonads after dissecting the fish. Growth
performance was monitored by recording the morphometric characteristics.
Wet body weight and total length of fish on start of feeding end of feeding
and two weeks after feeding were measured. The results of the present
study showed that all MT receiving treatment showed a significantly higher
male proportion than the control experiment. Dose rate of 75 mg kg-1
MT of feed resulted in maximum male population (98.09%) with 1.91% sterilized
fish. The dose rate of 75 mg kg-1 MT gave the maximum gain
in body weight i.e., 11.8 g, which is 1.2 times greater than the control. |
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G.H. Vosoghi
,
M.R. Fatemi
,
S. Jamili
,
A.R. Nikoyan
and
M. Rabbaniha
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This study was undertaken due to identification, abundance and diversity, temporal and spatial fluctuation of coralline fish larvae in Khark and Kharko Islands water. Khark and Kharko Islands are the last Northern point for fringing coral reefs in Iranian side of the Persian Gulf. These Coralline habitats are the Protected Area and Wildlife Refugees with the total area of 2400 ha which located in the territory of Bushehr Province. This research carried out during 2006-2007 with monthly sampling from 9 stations, which selected around Islands inshore waters with maximum depth of 20 m. Sampling was conducted using by Bongo-Net plankton sampler with 500 μ of mesh size. Totally 494 specimens from: 22 coralline fish larva families were identified in studied area, such as pelagic and demersal fishes. The results was shown that coral reef diversity in coral reefs (Khark and Kharko Islands) is more than other habitats such as estuary and river mouth, creeks, mangrove forest sites and off shore water of the Persian Gulf and Oman Sea Iranian side. The pick of fish larvae abundance family were estimated in spring. |
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M. Kerdgari
,
T. Valinassab
,
S. Jamili
,
M.R. Fatemi
and
F. Kaymaram
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Since the N. japonicus comprises the most abundant commercial fish in the Persian Gulf, an evaluation of the stock status of this species is needed. Reproductive biology of Nemipterus japonicus in the northern part of Persian Gulf is described, based on 595 specimens collected between November 2006 and October 2007. Length range of females was 11.0-26.3 cm FL and their weight range was 21.7-325.65 g. Males ranged from 9.4-27.3 cm FL and 14.04-351.89 g in weight. The relationship between Body Weight (BW) and Fork Length (FL) for all individuals was estimated as BW = 0.0181xFL3.0001 (r2 = 0.9797, n = 503). The overall sex ratio was estimated as M: F = 1.0: 2.6. The length at 50% maturity was estimated to be 19.1 cm for females and 19.6 cm for males. The smallest size at first maturity was 9.4 cm for males and 11.0 cm for females. The spawning behavior was investigated based on macroscopic observations of gonads and determination of gonadosomatic index. The maximum GSI values were recorded in April (2.70%) and September (0.45%) for females and males, respectively. Spawning occurs in spring and autumn seasons. |
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S. Daei
,
S. Jamili
,
A. Mashinchian
and
M. Ramin
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This study was carried out within inland Aquaculture Research Center Bandar Anzali (Guilan Province) through Southwestern part of the Caspian Sea; to examine the effect of two heavy metals (lead, cadmium) on (Fe) amount in blood of Chalcalburnus chalcoides. This fish is widespread and lives through Southern and Western part of the Caspian. The sampling was randomly done in two stages. The size of fish was 15-16 cm. After transferring fish to the pool, in order to adaptation, has been provided 12 aquariums in which 9 fish were released to each one. Regarding to the lowest capacity (LC50) for these fish, chose the selective densities to pollute aquariums’ environs. In such a way that for each aquarium cell with a constant density, we account 0.05, 0.15 and 0.03 ppm for lead and 0.15, 0.25 and 0.75 ppm for cadmium, respectively; while a stereotype aquarium was considered as a non- polluted environ. In each stage, we left 3 fish out of them to take blood from their heart and tail-stem, then we transferred the frozen samples to the lab. This experiment was repeated for the second metal as the same. Acid nitric digested the blood to provide a transparent and colorless solution for the atomic absorption device. With respect to the obtained absorptions by Pb, Cd and Fe in lab, the variance analysis (ANOVA) was carried out in (SPSS) and (Excel) systems. Based on statistical results, cadmium with ratio p<0.05 replaced with ferritin (Fe) over the time, but metal (Pb) couldn’t so. The results indicated that by increase in lead density within various times, this metal was absorbed by other fish’s tissues. |
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L.S. Kavan
,
S.R. Gilkolaei
,
G. Vossoughi
,
S.M.R. Fatemi
,
R. Safari
and
S. Jamili
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The genetic diversity and population structure of Rutilus frisii kutum from three regions in the Iranian coastline and one region from Azerbaijan were investigated using microsatellite DNA markers. Genomic DNA from 140 specimens was extracted and using PCR approach nine loci with reasonable polymorphism were amplified. The results showed that the lowest mean number of alleles per locus (5.22) was observed in Tonekabon River and the highest (5.77) in Azerbaijan population. The observed heterozygosity in the Tonekabon River (0.625) population was higher than those of the other two populations in Iran and Azerbaijan population (0.473). Significant deviations from HWE were found at more loci in the Iranian populations than Azeri population. In spite of geographical distance, both the highest and lowest population differentiation (Fst) value was between Iranian populations not among the Iranian and Azerbaijan populations. The highest and significant was between Khoshkrud and Tonekabon (0.098) and the lowest and significant was between Khoshkrud and Gorganrud (0.062). The genetic distance was the lowest (0.27) between the Khoshkrud and Gorganrud populations, whereas the highest distance (0.493) was between Khoshkrud and Tonekabon River.The AMOVA analysis with consideration of 2 sampling regions (Iran and Azerbaijan) and 4 sampling locations (Iran: Khoshkrud, Tonekabon, Gorganrud and Azerbaijan: the Kura mouth) revealed that almost all of the variance in data namely 86% (p = 0.01) was within locations, genetic variances among locations was 12% (p = 0.01) and among regions was 2% (p = 0.01). The reported results could be of interest for management and conservation programmes of this species in the Caspian Sea. |
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S.M. Reza Fatemi
,
S. Jamili
,
T. Valinassab
and
N. Kuranlu
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We report on result of an investigation along Lengeh Port and Qeshm Island to determine the species of Ophiuroidea in Persian Gulf. Collection of Ophiuroids was done by hand from the total 23 locations at rocky intertidal flats of Lengeh Port and Qeshm Island in 2007. Identification of the collected samples was carried out using several keys. Two Ophiuroids species belonging to a single family Ophiocomidae, including Ophiocoma erinaceus (Müller and Troschel, 1842) and Ophiocoma scolopendrina (Lamark, 1816) were identified. Ophiocoma erinaceus has not been previously reported from the Persian Gulf (neither North nor South). Single specimen of O. erinaceus apeared to be O. erinaceus Müller and Troschel, 1842 (schoenleini M. and T.1842, form) due to one tentacle scale in most parts of arms except 6 first segments and three arm spines on fourth segment and disc granules extending into oral interradius of disc. Ophiocoma scolopendrina have shown varied color patterns. The present paper is mainly centered around and aimed at representing O. scolopendrina which with 83 records, seems to be a common species of Ophiuroidea in rocky and rocky-sandy coast of Lengeh Port and Qeshm Island. This finding indicated that further sampling especially in deeper waters would be probably resulted into finding of additional Ophiuroids taxa. |
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F. Mohammadizadeh
,
T. Valinassab
,
S. Jamili
,
A. Matinfar
,
A.H. Bahri-Shabanipour
and
M. Mohammadizadeh
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The present study investigated feeding habits and diet
composition of Sawtooth barracuda (Sphyraena putnamae) by regular
monthly collection throughout 13 months from November 2006 to November
2007 in the Northern Persian Gulf. Sawtooth barracuda is considered as
one of the valuable fishes in the Persian Gulf. The 486 specimens of
Sphyraena putnamae were examined. The highest and the lowest observed
Fork length and body weight was 10.6 and 93.0 cm and 8.03 and 40.0 g,
respectively. The fork length-weight relationships was W = 0.0071 FL2.9295
(R2 = 0.99). Studies have showed that this fish, having the
Relative Length of Gut RLG = 0.34±0.002, is strongly carnivorous
(meat-eater, often fish-eater), proven by the fact that more than 98%
of its stomach contents are fish. The CV = 0.47% indicates the middle
alimentary of this fish. Index of condition factor (Kf), increasing
in March and decreasing in June. Gastro-Somatic Index (GaSI), indicating
the highest level in the month of January and July and lowest level in
June and October. The Fullness Index (FI) increases in March before spawning
and decreases in June and September during spawning. |
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S. Abdolbaghian
,
S. Jamili
and
A. Matinfar
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There are several factors affecting Angel Fish fry’s (Pterophllum scalare) growth and quality. In this study, the effect of food treatments including dry blood worm, Artemia decapsulated cysts and dry blood worm together with Artemia decapsulated cyst in three temperature conditions i.e., 27, 29 and 31°C on specific growth rate and weight growth of angel fish fry (Pterophllum scalare) has been studied. For each food diet three repetitions took place. Thus, 27 aquariums with 30, 40 and 60 dimensions were allocated to the treatments. An observant treatment with 28°C and pollaki as the food was also used. The degrees of these indexes (SGR and WG) were examined in a 6 month experiment. Meanwhile, the other factors including the pH and the oxygen degree were fixed and similar for all treatments. The results showed that the temperature and food type are simultaneously effective on specific growth rate and weight growth of the fish. Among all food and temperature treatments and the observant treatment, the degree of SGR and WG for the fish was believe to be more in the food treatment with 31°C and powdered dry blood worm. This result confirms that temperature and food diet simultaneously affect the Angel Fish fry’s SGR and WG. |
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L. Roomian
and
S. Jamili
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Monthly data of length composition for Tenualosa ilisha landed between April 2006 to March 2007 in north of Persian Gulf were used to estimate the growth, mortality and exploitation parameters of the stock. Maximum total length and weight were 43 cm and 949 g, respectively. Nonlinear least square fitting provided a complete set of von Bertalanffy growth estimate: L8 = 42.74 cm total length, K= 0.77 and t0 = -0.21 years-1. The estimated value of total mortality based on length converted catch curve using these growth parameters is Z= 2.55 years-1. Natural mortality based on growth parameters and mean environmental temperature (T = 23 C) is 0.75 years-1. Fishing mortality computed for T. ilisha was 1.8 years-1. The exploitation rate (E) was 1.8 years-1. The higher value of E indicates over fishing during in period. Population dynamics and stock assessment of Tenualosa ilisha in Iran waters was studied using the length-frequency based analysis of FiSAT software to evaluate the growth parameters, mortality rates, exploitation rate and Maximum Sustainable Yield (MSY). The study showed that T. ilisha is in over fishing pressure. |
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M. Shapoori
,
A. Javanshir
,
S. Jamili
,
M. Fallahi
and
R. Changizi
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The phytoplankton community composition, abundance and
size-fractionated biomass (chlorophyll a) along with various physical
and chemical parameters were assessed in Tajan estuary, in South Caspian
Sea Basin. Monthly sampling was conducted at 6 stations. Based on results,
the mouth or formed estuary could be categorized in three different classes.
Category 1: station essentially related to river input and low net production
(vary between 13.8 and 46.4 mg m-3 year-1. Category
2: consists of high net production (between 277.9 and 330.4 mg m-3
year-1) and mild consumption of (8.4 to 32.5 mg m-3
year-1). The 3rd category is considered to be in the middle
of two above values from productivity point of view with (236.7 to 240.2
mg m-3 year-1) and relatively mild consumptions
of (20.9 to 92.4 mg m-3 year-1). It seems that importance
of such areas is much more in their nutrient inlet of the river from upper
mouth. Net primary productions were high in the center of estuary with
values near to 277 mg m-3 year-1. Selected station
in lower mouth situated in the adjacent area inlet also showed high concentrations
of 330 mg m-3 year-1, which suggests the existence
of a nutrient front where fresh waters originated from rivers (rich in
nutrient and phytoplankton decomposition materials) joint salt waters
of the sea. In these stations phytoplankton has not enough time to be
consumed because of soft sediments instability and inevitably is added
to south Caspian basin production. Also primary production among months
and seasons shows fluctuations, perhaps related to water inlet availability
and residence time. There suggests a correlation between primary production
and river discharge in different selected stations. |
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M.F. Lasheidani
,
S.N. Balouchi
,
A. Keyvan
,
S. Jamili
and
K. Falakrou
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Morphological assessment of sexually mature Rutilus
frisii kutum Kamenskii 1901 caught from the rivers (Shirud, Khoshkrud,
Sepidrud and Chelavand Rivers) flowing in the southwest Caspian Sea region
was conducted and sperm volume, total sperm count and sperm concentration
of abnormal sperms were determined after exposing the spawners to 60%
herbicide butachlor (machete). Spawners under study were maintained in
tanks (1000 L) at the Shahid Ansari Teleost Fish Hatchery and exposed
to two different concentrations (25 and 75% of its LC50 value)
of butachlor. Results obtained indicate that exposure to high butachlor
toxicity (75% of its LC50 value) decreased sperm volume to
0.61 ± 0.42 cc in 2-3 year old fishes and to 0.55 ± 0.42
cc in fishes above 3 years of age, while that in fish exposed to low butachlor
toxicity (25% of its LC50 value) decreased to 1.55 ±
0.42 cc in 2-3 year old fishes and to 1.28 ± 0.42 cc in fishes
above 3 years of age. The sperm volume under normal conditions in R.
frisii kutum is 4.6 ± 0.42 cc in 2-3 years old and 4.58 ±
0.42 cc in fishes above 3 years of age. The total sperm count in R.
frisii kutum is 39.74 ± 2.5 billion spermatozoa cc-1
in 2-3 year olds and 42.99 ± 2.5 billion spermatozoa cc-1
in fishes above 3 years of age. When exposed to high butachlor toxicity,
total sperm count dropped to 16.92 ± 2.5 billion spermatozoa cc-1
in 2-3 year olds and to 15.98 ± 2.5 billion spermatozoa cc-1
in fishes above 3 years of age. Similarly total sperm count in R.
frisii kutum exposed to low butachlor toxicity was recorded as 23.6
± 2.5 billion spermatozoa cc-1 in 2-3 year olds and
29.4 ± 2.5 billion spermatozoa cc-1 in fishes above
3 years of age. Under normal conditions, on the basis of morphology, spermatozoa
showed only 10 ± 1.92% of abnormal sperms. The number of abnormal
sperms increased by 28.6 ± 1.92% in fishes exposed to high butachlor
toxicity, while that in fishes exposed to low butachlor toxicity increased
by 19.7 ± 1.92% in 2-3 year olds and 16.6 ± 19.2% in fishes
above 3 years of age. It is evident from the results obtained that increase
in level of pollution caused a decrease in sperm volume but an increase
in the percentage of abnormal sperms. |
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F. Darafsh
,
A. Mashinchian
,
M. Fatemi
and
S. Jamili
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The general purpose of this study is investigating the
degree of heavy metal accumulation in scales, livers and gonads of the
Cyprinus carpio and determining fish scale as the most suitable
bioindicator for lead and zinc sedimentation in the environment of the
sampling stations. Also, amounts of lead and zinc in the livers, scales
and gonads tissues of the Cyprinus carpio are measured and a comparison
is made between the amounts measured in the sediments and those measured
in the livers, gonads and scales of the fish. Five sampling stations at
different districts in the following cities were chosen: Astara, Hashtpar,
Bandar Anzali, Ramsar and Chalous. Samples were prepared and classified
according to fish organs as sedimental samples, liver samples, scale samples
and gonad samples and then lead and zinc levels were measured in them.
Results of this study show that fish scale is a better index of zinc content
than liver and gonad in addition; fish scale is a better index of lead
content than gonad. As no strong correlation was found between lead pollution
level in the environment and that in fish scales, it was concluded that
fish scale is a weaker index for lead than for zinc. The results obtained
of the bioaccumulation of lead in the related tissues was found to be
in the following order: Liver average < Female gonad average < Sediments
average < Male gonad average < Scales average. The bioaccumulation of
zinc in the studied tissues was found to be in the following order: Male
gonad average < Sediments average < Female gonad average < scales average
< Liver average. |
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S. Jamili
,
L. Salimi
,
A. Motalebi
and
M. Rostami-Beshman
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The Anodont (Anodonta cygnea) constitutes one
of the most important bivalves along of Anzali Lagoon. In last decade,
Anodont have suffered a high degree of mortality. Introduce of the morphological
characterization of hemocytes is a prerequisite to further exploring the
causes of death in bivalves, therefore in this study, the circulating
hemocytes of the Anodonta cygnea in Anzali Lagoon were identified.
At first, two types of hemocytes were recognized, granulocytes and agranulocytes,
were identified based on the existence of cytoplasmic granules under light
microscopy. The hemocytes were then stained and the granulocytes subclassifed
into eosinophilic and basophilic granulocytes and an intermix. The eosinophilic
granulocytes were distinctive small and large granules. Agranulocytes
could be subdivided into hyalinocytes and blast-like cells and another
cell type, vesicular cells, was observed as unclassified cells. Results
were compared with similar researches about other bivalves observations. |
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B. Moghaddasi
,
S.M.B. Nabavi
,
G. Vosoughi
,
S.M.R. Fatemi
and
S. Jamili
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Abundance and distribution of benthic Foraminifera,
in the Northern Oman Sea (Iranian side) continental shelf sediments was
studied. Sediment samples were gathered in Winter 2006, from eight stations
ranging in depth from 30 to 103 m. Environmental conditions including
water depth, temperature, dissolved oxygen, salinity, pH, grain size,
total organic matter and calcium carbonate concentration were measured
and their relationship with the distribution of benthic foraminifera was
discussed. Forams were the most abundant meiobenthic group in nearby all
the stations. The suborder ROTALIINA was dominant in the northern region
while LAGENINA, MILIOLINA and TEXTULARIINA, were being abundant in the
northwest region too. LAGENINA were being very abundant in the stations
with higher depth. From the total 40 species belonging to 24 genera, Ammonia
beccarii was common in the whole research region. Water depth, salinity
and substrate seemed to be the most important environmental factors controlling
the distribution of benthic foraminifera. None or rare structural abnormal
and oil polluted individuals, in nearby all stations, leading to the clean
benthic environment of the Oman Sea benthic zone. |
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M.R. Rahimibashar
,
A. Esmaeili-Sary
,
S.A. Nezami
,
A. Javanshir
,
S.M. Reza Fatemi
and
S. Jamili
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The aim of this study was to examine spatial and temporal variability in phytoplankton and zooplankton abundance and diversity in Sefid-Rood River Estuary (SRE). Variability of Chlorophyll a and inorganic nutrient concentration were determined during a year (November 2005- October 2006) in five sampling stations. Total chlorophyll a concentration during the investigation ranged between zero to 22.8 μg L-1 and the highest levels were consistently recorded during Summer and the lowest during winter with a annual mean concentration 4.48 μg L-1. Nutrient concentration was seasonally related to river flow with annual mean concentration: NO2 0.05±0.2, NO-3 1.13±0.57 and NH+4 0.51±0.66 mg L-1, total phosphate 0.13±0.1 and SiO2 5.68±1.91 mg L-1. Bacillariophytes, Cyanophytes, Chlorophytes, Pyrophytes and Euglenophytes were the dominant phytoplankton groups in this shallow and turbid estuary. The diversity and abundance of phytoplankton had a seasonal pattern while Diatomas and Chrysophytes were dominant throughout the year but Cyanophytes observed only during the Summer. Zooplankton community structure was dominated by copepods which 68% of the total Zooplankton. In the winter and summer seasons two increased in the number of zooplankton community and usually toward the sea had occurred. Zooplankton also showed a significant spatial and temporal variation. The high turbidity and temperature prime characteristics of SRE seem to be determining factors acting directly on Phytoplankton and Zooplankton temporal variability and nutrient fluctuations. Everywhere in this estuary nutrients appeared to be in excess of algal requirement and did not influence an phytoplankton and zooplankton composition. Also there was a positive correlation between chlorophyll a and temperature and a negative one with DIN and TP. |
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N. Sajjadi
,
P. Eghtesadi-Araghi
,
A. Mashinchian
,
S. Jamili
,
S. Farzadnia
and
M.S. Hashtroodi
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Seasonal variations of fatty acids were studied in the
lipid fractions of the bivalve mollusk, Saccostrea cucullata, at
the intertidal zone of Chabahar bay in the northern part of Oman Sea (Iran).
Samples were collected in rocky shores between two stations. The analysis
were carried by GC/MS chromatography. Thirteen fatty acids were identified,
of which, the most important saturated fatty acids (SFA) were 14:0, 4,
8, 12 tri Me- 13:0, 16:0 and 18:0, the mono unsaturated fatty acids (MUFA)
included 16:1n-9, 18:1n-9 and 20:1n-11, the polyunsaturated fatty acids
(PUFA) were linoleic acid 9,12 18:2 , eicosapentaenoic acid EPA 20:5n-3
and arachidonic acid 20:4n-6.Variability of the fatty acid components
were studied in four seasons. Maximum percentage level in Saccostrea
cucullata for 14:0, 4, 8, 12 tri Me 13:0, 16:0 and 15:0 as saturated
fatty acids was observed in summer, while for 18:1n-9, 20:1n-11 and 20:5n-3
(as unsaturated fatty acids) maximum concentration was observed in winter.
The environmental factors were monitored monthly and their effects on
seasonal variations of the fatty acids were studied by applying pearson
coefficient correlation. The results showed the significant dependency
of 20:1n-11 fatty acid concentration to ambient temperature and 9,12 18:2
fatty acid to silicate as environmental factors. Also, principal component
analysis was done to establish the fatty acid groups. After Varimax rotation,
three factors were extracted, of which first and second factors contributed
to 86% of the data matrix. These were mainly dependent on the seasonal
variations of the fatty acids. |
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E. Shirvani
and
S. Jamili
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This study was performed in spring 2008 in order to determinate
of Cd and Pb accumulation in gills, kidney, skin tissues and muscles of Chalcalburnus
chalcoides in Anzali Port in the South west of Caspian Sea within 10 km2
zone. The samples were collected from 12 stations, biometric measurements had
been taken, thereafter, tissues were separated and digested chemically and then
it were analyzed by Flame Atomic Absorption Spectrophotometer. Pearson correlation
of metal’s concentration in studied tissues with the weight and forked length
of fish showed non significant relationship between weight and length (p≥0.05)
and results showed that smaller fish have higher concentration of Cd and Pb
than larger ones. Maximum concentrations of Cd and Pb were recorded in gills
(0.94 and 8.33 ppm) while minimum concentrations were recorded in muscles (0.02
and 0.12 ppm). Results show that Cd and Pb were accumulated in descending order
in gills>skin>kidney>muscles. The level of metals was compared with
(WHO, 1993) standard and it was resulted that Cd in gills and Pb in all tissues
were significant difference at (p<0.05) levels. |
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T.B. Arabani
,
S. Jamili
and
F. Abbassi
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The effect of heavy metals on Ca2+-ATPase from the sarcoplasmic reticulum in fish muscles has been studied, but there is not any evidence about interaction between heavy metals and Ca2+ in muscle tissue. The concentration of heavy metals (Zn, Cu, Pb) in two economically important fish species (Ctenopharyngodon idella, Hypophthalmichthys molitrix) collected from some ponds in Gilan, Iran were determined using flame atomic absorption spectrometry after digestion methods. Trace metals content in fish samples were 0.88-4.50 μg g-1 for copper, 1.83-5.92 μg g-1 for lead, 5.63-12.63 μg g-1 for zinc and 72.31-173.43 μg g-1 for calcium. There is no interaction between heavy metals and calcium concentration in muscles. |
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H. Maaboodi
,
S. Jamili
and
H. Maddani
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The aim of the study is measuring and studying the amount and variation of some important heavy metal on fish body. Zayande-rood flows from origin in Chahar-Mahal-Bakhtyari to the East of Iran and endes in Gavkhooni swamp in Isfahan province. Waste waters from farming, homes and industry are responsible for its pollution with heavy metals which can be absorbed from the liver of fishes. Therefore a study on environmental varieties is important. In order to determine the amount of lead and zinc in the liver of fishes, 5 stations have been organized as follow: Zarinshahr, Nekooabad, Falavarjan, Wahid, Choom. Edible fishes belong to the Cyprinidae group and Carrassius, C. aculeata, C. damasciana, C. carpio species. In order to asses the amount of lead and zinc, the liver tissue of fishes separates, burns, digests their ashes then the amount of heavy metal is calculated. The A.A.S. average of lsead was 3.13±0.9 mg kg-1 dry weight, p<0.05 and zinc was 146.5±36.9, p>0.05. The zinc level is high but lead is normal. There is a high level of zinc in Zayandehrood. These results support with other studies by other researchers. A high level of zinc could cause metabolic disorders and a detoxification process could create many clinical damages in human. |
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N. Zorriasatein
,
B. Dehzad
,
G. Vossoughi
,
M. Shapoori
and
S. Jamili
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The present research is a study on water quality and benthic macro invertebrate in Gorganrood River, a South Eastern Caspian Sea. The research was carried out at six sampling sites and the abundance and diversity of benthos were monitored along the length of river from 2007 to 2008. Fourteen families included under different groups such as Annelida, Mollusca and Insecta were recorded in the present investigation. The greatest number of species were recorded at 1st station and the least number was at 6th station. Low macro invertebrate abundance was observed during spring as a result of heavy rainfall and flood and generally in all lowest section because of high value of nitrogen and other nutrients. Water physicochemical parameters such as Phosphate, Nitrate, TPS and others were measured and water quality were studied through different indices such as saprobic system, Helsinhoff (FBI), BMWP and the results were compared and evaluated by physical and chemical parameters. The result indicated that the water quality in the up stream and the middle were good to fair, but the down stream qualities were poor at all sites. |
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