Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
EFFECTS OF DIETARY NUCLEOTIDE ON STRUCTURE OF PYLORIC CAECA IN SALMO TRTTA CASPIOUS KESSLER, 1870
1
10
FA
صادق
اولاد
صابر
خدابنده
surp78@yahoo.com
عبدالمحمد
عابدیان
aabedian@yahoo.co.uk
نعمت اله
محمودی
10.22092/isfj.2017.109970
<span>To assess the effects of dietary nucleotide on structure of pyloric caeca in Salmo trutta caspius, 315 juvenile fish with average weight of 12.26g (average length 11.12cm) were fed with dietary nucleotide (NT) and a control diet for 8 weeks (0.25% NT, 0.5% NT and 0% as control). To investigate the changes of pyloric caeca structure, 6 fish specimens from each treatment fixed into Bouin solution for histological examinations. Then, the sample was placed in paraffin, and 4</span><span>m</span><span>m sections of samples were provided and after coloration were investigated for histological features. The investigation demonstrated that both NT-supplemented diets had significant effects (P<0.05) on thickness of enterocyte, villi length, number of enterocyte cell and thickness of pyloric caeca muscle. However, between the two treated groups, changes of enterocyte and sub mucosa, length and number of villi were non-significant (P>0.05). However, the group receiving 0.25% NT showed more positive effects on enterocyte cell number and thickness of muscle layer compared with those treated with 0.5% NT.</span>
NUCLEOTIDE,PYLORIC CAECA,ABSORPTION,Growth,Salmo trutta caspius
https://isfj.areeo.ac.ir/article_109970.html
https://isfj.areeo.ac.ir/article_109970_7ad5e6148f4dd7a2f950dbf3abbcd1c1.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
MORPHO-CYTOLOGICAL STUDY OF THE HEAD, BODY AND CAUDAL PARTS OF KIDNEY IN JUVENILE ACIPENSER PERSICUS USING MODELING METHOD
11
22
FA
آرزو
چرمی
charmiarezoo@gmail.com
محمود
بهمنی
mahmoudbahmani@ymail.com
میرمسعود
سجادی
رضوان اله
کاظمی
rezkazemi2000@yahoo.com
علی
حلاجیان
alihallajian@gmail.com
سهراب
دژندیان
ایوب
یوسفی
محمد
پوردهقان
10.22092/isfj.2017.109971
<span>Morpho-cytological patterns of juvenile Acipenser persicus on basis of structure, size and distribution of kidney nephrons were studied. Sampling of head, body and caudal parts of the kidney in the fish aged 1 and 2 years were carried out (3 specimens of each age). Area, length and small diameter of nephron cells were measured by light microscope and Biocome Visolab software. We observed the kidney of A. persicus consisting of: Glomeruls, Bowman's capsule, Proximal, Distal and Collecting tubule. The statistical analyzes showed no significant difference in the area, length and small diameter between the two ages. Furthermore, the results showed that the average area in 1 and 2 year old fish were 4004.28</span><span>±</span><span>2486.63 and 4614.64</span><span>±</span><span>1261.69 </span><span>m</span><span>m in proximal cells, 2529.75</span><span>±</span><span>1015.51 and 4747.33</span><span>±</span><span>1676.03 </span><span>m</span><span>m in distal cells, 2220.98</span><span>±</span><span>1668.87 and 3253.48</span><span>±</span><span>1747.25 </span><span>m</span><span>m in collecting tubules, 4692.37</span><span>±</span><span>1739.79 and 9355.37</span><span>±</span><span>2073.92 </span><span>m</span><span>m in Glomeruls, 6768.23</span><span>±</span><span>1640.54 and 129210.07</span><span>±</span><span>1775.76 </span><span>m</span><span>m in Bowman's capsule, respectively. The average length and small diameter in 1 and 2 years old fish were 84.75</span><span>±</span><span>24.99, 53.52</span><span>±</span><span>14.03 and 82.76</span><span>±</span><span>7.46, 66.00</span><span>±</span><span>7.37 </span><span>m</span><span>m in proximal cells, 72.98</span><span>±</span><span>16.28, 51.10</span><span>±</span><span>15.00 and 77.95</span><span>±</span><span>9.43, 64.57</span><span>±</span><span>8.34 </span><span>m</span><span>m in distal cells, 60.52</span><span>±</span><span>13.69, 49.02</span><span>±</span><span>12.60 and 66.40</span><span>±</span><span>12.21, 57.40</span><span>±</span><span>14.20 </span><span>m</span><span>m in collecting tubules, 94.70</span><span>±</span><span>16.97, 72.78</span><span>±</span><span>12.75 and 129.04</span><span>±</span><span>23.59, 96.60</span><span>±</span><span>18.88 </span><span>m</span><span>m in Glomerules, 120.99</span><span>±</span><span>14.86, 80.77</span><span>±</span><span>9.78 and 144.76</span><span>±</span><span>21.12, 107.56</span><span>±</span><span>21.53 </span><span>m</span><span>m in Bowman's capsule, respectively. In all cases, no significant differences were found between measured cell of the 1 and 2 year old fish (P>0.05). Also, the modeling showed the kidney of A. persicus was Y shaped in which the distribution of different cells is not homogenous in all sections of the kidney.</span>
NEPHRON,URINE UNITE,Acipenser persicus,Morphology,modeling
https://isfj.areeo.ac.ir/article_109971.html
https://isfj.areeo.ac.ir/article_109971_857bf62e37f04b90bb74f748c5dac796.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Effects of edible film of sodium alginate on quality changes of dressed kilka in frozen storage
23
30
FA
A.
Khanedan
nasrinkh41@yahoo.com
A.A.
Motallebi
motalebi@ifro.ir
A.A.
Khanipour
aakhanipour@yahoo.com
10.22092/isfj.2017.109972
The likely effects of sodium alginate edible coating on the quality of dressed kilka fish in
the frozen storage was investigated. Sodium alginate edible coating was prepared in four
concentrations (0.25, 0.75, 1.25, and 1.75%). Then, dressed kilka fish were coated with
sodium alginate for 1h, packed in polyethylene dishes with cellophane blanket and stored at -
18°C. The amount of hem Iron, pH, percent lipid and organoleptic characteristics (odor,
color) were assessed within 0, 1, 2, 3 and 4 months (sample size: 125 packs of 250g). Results
showed a significant difference between the mean hem iron and percent lipid and increase in
sodium alginate concentration (P0.05) with different levels of coating. Organoleptic results showed that the mean color and
odor value of the samples were affected significantly by different levels of coating (P
Kilka fish,Edible coating,Sodiume alginate,Fish quality
https://isfj.areeo.ac.ir/article_109972.html
https://isfj.areeo.ac.ir/article_109972_8b55442c7abcc35eb566190d0fcce21f.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Heavy metals (Ni, Cd, Pb, Cu) concentrations in seaweed and sediments along the coastal areas of Hormuzgan province (Bandar Abbas and Bandar Lengeh)
31
42
FA
A.
Dadolahi Sohrab
p_dadolahi@yahoo.com
M.
Saghily
N.
Khivar
10.22092/isfj.2017.109973
Metals concentrations were studied in dominant seaweeds and their adjacent sediments in
Bandar Abbas and Bandar Lengeh tidal areas. The status of selected heavy metals (Ni, Cd, Pb,
Cu) was determined in sediments and 15 dominant seaweed species including 4 species of
Chlorophyta, 4 species of Phaeophyta and 7 species of Rhodophyta. Samples of seaweed and
sediment were collected seasonally during November 2007 to August 2008 from intertidal
regions of nine sites along the Bandar Abbas and Bandar Lengeh coasts. Powdered samples of
sediments and seaweed were digested and analyzed using Atomic Absorption
Spectrophotometer (A.A.S). Concentrations of Cu, Pb, Cd, and Ni were 5.24, 20.44, 5.40 and
33.83μg/g-1 dry wt. in sediments. Concentration of these metals in μg/g-1 dry weight in
Chlorophyta were 11.11, 25.79, 4.76 and 46.57, in Phaeophyta were 9.18, 17.68, 4.82 and
36.65, and in Rhadophyta were 9.80, 21.03, 4.96 and 50.43, respectively. The marine seaweed
species collected during all seasons and sites in Bandar Abbas and Bandar Lengeh were
identified as Entromorpha compressa and Padina pavonica, respectively.
*Corresponding author
heavy metals,SEAWEED,Sediment,BANDAR ABBAS,Bandar Lengeh,Iran
https://isfj.areeo.ac.ir/article_109973.html
https://isfj.areeo.ac.ir/article_109973_fc98183d627f77d6ffbd12a248227f42.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Survey of nutritional and economic values of bighead (Hypophthalmichthys nobilis) in various sizes
43
52
FA
M.
Zolfaghari
zolfaghari.mz@gmail.com
B.
Shabanpour
shabanpour@yahoo.com
A.
Shabani
F.
Shirani Bidabadi
10.22092/isfj.2017.109974
Cultured fish are presented in various sizes and prices in market. The present study aimed
to investigate the proportion of nutritional value and price of various weight groups of
bighead (Hypophthalmichthys nobilis) and to offer two indices for comparing nutritional
value in proportion with fish prices. For this purpose, bighead specimens were prepared in
market sizes and their dry matter, lipid, protein and ash content and fillet yield were
determined. Then, the proportion of nutritional and financial value (NP) and justified price
difference based on dry matter content (PDdm) were calculated for each weight group. The
results showed that the light weight group has a higher NP index for dry matter, protein, ash
and energy than medium and heavy weight group. The NP index was the same between
medium and heavy groups. While the price difference between light weight and two other
weight groups is more than calculated PDdm index, the light weight group is a proper choice
for purchase.
*Corresponding author
Fish breeding,Productivity,NP index,PDdm index
https://isfj.areeo.ac.ir/article_109974.html
https://isfj.areeo.ac.ir/article_109974_97864d23c2d5e9e5f532183ce92a3553.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
LC50 and bioaccumulation of Cd in different life stages of Artemia urmiana
53
64
FA
B.
Rahimi
beti_rf@yahoo.com
P.
Nejatkhah Manavi
10.22092/isfj.2017.109975
This study was conducted in vitro to assess lethality, LC50 and the possibility of bioaccumulation of
cadmium in various life stages of Artemia urmiana. Artemia is highly used in aquaculture hence the
response of the organisms to pollutants, such as cadmium regarding the increase in environmental
pollution is of high importance. This experiment was performed in Faculty of Marine science and
Technology, Islamic Azad University and Atomic Energy Organization of Iran in 2009. In the first
stage, smaller than 1day naupliis were exposed to 10 different concentrations from 0 to 250mg/l Cd.
LC50 of Cd in 24h of A. urmiana exposure was 189.33mg/L. Next, the accumulations of Cd in 5, 10,
15 and 20mg/l Cd were examined in 1, 5, 11 and 17 days of Artemia urmiana life. The results showed
that Artemia urmiana has the ability of accumulation of cadmium and the accumulation level depends
upon the concentration of the cadmium in the environment as well as different living periods of
Artemia. We found that increasing the concentration of cadmium in the environment increases its
accumulation in Artemia. There was a significant difference in accumulation of Cd between 5mg/l Cd
(0.267ppm) and 20mg/l Cd (0.364ppm) in the first day of A. urmiana life (P
Artemia urmiana,Pollution,heavy metals,Toxics
https://isfj.areeo.ac.ir/article_109975.html
https://isfj.areeo.ac.ir/article_109975_c3c4c853101dc274a35c48cc30c10cf3.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Genetic comparison of Neogobius caspius (Eichwald, 1831) in the west and east of south Caspian Sea using microsatellite markers
65
74
FA
S.
Rezvani
rezvani@ifro.ir
E.
Gothb Razmjoo
F.
Laloei
laloei@yahoo.com
M.J.
Taghavi
M.
Nooruzi
nmehrnoosh@yahoo.com
10.22092/isfj.2017.109976
Neogobius caspius is a small benthic fish, native to the Caspian Sea. The fish is highly
important as it comprises the main food item of the Caspian Sturgeons. The genetic diversity
of N. caspius populations in the Caspian Sea was studied using microsatellite technique. In
the study, 115 specimens of N. caspius from two regions (Turkmen Bandar and Anzali
Bandar) in south Caspian Sea were collected. DNA was extracted using 12 pairs of
microstellite primers for which polymerase chain reaction (PCR) was conducted. DNA bands
were analyzed using UVdoct and GenAlex software package. Out of 12 microsatellite
primers, 11 loci were produced, of which 9 were polymorphic, 2 monomorphic and one
showed smear. The average observed and expected hetrozygosity was 0.749 and 0.638,
respectively. Significant genetic differences between the two regions were observed (P 0.01).
Deviations from Hardy-Weinberg equilibrium were in all specimens. These results indicate
that at least two populations of N. caspius exist in the south Caspian Sea.
*Corresponding author
microsatellite,population genetics,NEOGOBIUS CASPIUS,Caspian Sea
https://isfj.areeo.ac.ir/article_109976.html
https://isfj.areeo.ac.ir/article_109976_4922ca57d450884601cd12c176731110.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
The growth of faunal aquatics on artificial reefs in Bandar Lengeh Area, Persian Gulf
75
88
FA
F.
Saraji
saraji20042000@yahoo.com
M.S.
Mortazavi
mseddiq1@yahoo.com
G.A.
Zarshenas
zarshenas1@yahoo.com
A.
Kamali
kamalyeassa@yahoo.com
B.
Daghooghi
F.
Islami
fr_eslami1689@yahoo.com
10.22092/isfj.2017.109977
The growth of organisms on seven different artificial reef structures was surveyed from
2004-2006 in Hormuzgan offshore waters (Bandar Lengeh area). The organisms consisted of
12 groups the main of which included Barnacle (Megabalanus tintinnabulum), Sponges with
five families and Tunicates. The highest density was observed in 2005, amounting to some
409.224g wet weight on each structure. However, a decrease was observed afterwards in the
total mass of aquatics living on the structures. Some organisms such as crabs, polychaets,
bivalves and fish larvae showed an increasing in size in the first year. Bivalves showed a
decreasing trend in density but otherwise an increasing trend in size over time. Artificial
shape of the reefs was not effective on the total density of the organisms living on the
structures. Total density of live organisms on different parts of the artificial reefs (surface,
middle and bottom) was not statistically significant (P>0.05). Numbers of crabs on mixed
artificial reefs were higher than the other artificial reefs. This was also the same for barnacles.
*Corresponding author
habitat,Invertebrate,Density,Bandar Lengeh,Persian Gulf
https://isfj.areeo.ac.ir/article_109977.html
https://isfj.areeo.ac.ir/article_109977_0285212e1fb7593eafed1906ec6c5b12.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Experimental assessment of the histopathological effects of water-soluble fraction of crude oil on gill tissue of juvenile Rutilus frisii kutum
89
100
FA
I.
Sharifpour
isharifpour@yahoo.com
B.
Abtahi
F.
Heidary Jamebozorgi
S.J.
Seyfabadi
R.Z.
Taghizadeh
10.22092/isfj.2017.109978
The toxic effects of water soluble fraction (WSF) of crude oil on the gills of juvenile
kutum roach, Rutilus frisii kutum, were investigated. The juvenile (1-2g) kutum roach were
collected in summer 2008 from the Kolmeh Hatchery Center, Golestan province, and
acclimatized to laboratory conditions through keeping them in a 300 liter tank with dechlorinated
water for a minimum of 8 days. Six different types of WSF concentrations were
made to obtain LC5096h including 27, 29.25, 31.5, 33.75, 36 and 38.25ppm. Then, 10
fingerlings of R. frisii kutum were exposed to the WSF concentrations, for 96 hours.
Considering mortality rate of the juveniles in 96 hours and using Probit value statistical
analysis, LC5096h was obtained at 33.95ppm. Two different concentrations (0.1 LC50 and
LC50) of WSF were prepared for further assessments and after 24 and 96h of exposure, 3
individual fish were collected from each aquarium for histopathological studies. The gill
sections with 3 micron thickness were prepared, stained using H & E, and examined by light
microscope. General damages after observation included: Epithelial lifting, congestion in
filament and lamellae, clubbing, fusion, hypertrophy of epithelial cells of lamellae, different
levels of hyperplasia between lamella and aneurysms. Pathological studies showed that the
WSF of crude oil causes serious damage in gills of juvenile R. frisii kutum, leads to
malfunction of this organ which will harm homeostasis of the fish.
Corresponding author
Histopathology,Water-soluble fraction,Gill,Rutilus frisii kutum,Caspian Sea
https://isfj.areeo.ac.ir/article_109978.html
https://isfj.areeo.ac.ir/article_109978_cacc4d0d28603ee3d41640583110ca40.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
The effect of zeolite (Clinoptilolite) in removing ammonia lethal concentration in Rainbow Trout (Oncorhynchus mykiss)
101
110
FA
M.
Farhangi
s.farhangi@yahoo.com
A.M.
Hajimoradloo
10.22092/isfj.2017.109979
Clinoptilolite efficiency on absorption of ammonia in rainbow trout was studied. The fish
specimens weighted 9.5-21g and were exposed to four different concentrations of total
ammonia as N-NH4 including: 10, 15, 20, and .25mg/l. A group of 13 fish was considered as
control. Lethal concentration was determined after 24 hours. Under stable temperature and pH
conditions (T= 16±1 C, pH= 7.7±1), the lethal concentration of total N-NH4 was 25mg/l (as
ionized N-NH3=0.44mg/l based on temperature and pH). In lethal concentrations of ammonia,
different amounts of zeolite (2, 5, 10, 13 and 15g/l) were used. Application of 15g/l of the
zeolite prevented mortalities in the fish. A significant difference was found in reduction of
total ammonia and total hardness through application of zeolite after 24 hours (P
Tissue lesions,Water refining,Water quality
https://isfj.areeo.ac.ir/article_109979.html
https://isfj.areeo.ac.ir/article_109979_1092b079247075bf93b8bf2e2ae1dbe2.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
EFFECTS OF DIETARY VEGETABLE OIL ON STRUCTURE OF PYLORIC CAECA IN CASPIAN SALMON FRY, SALMO TRUTTA CASPIUS
111
122
FA
سهیلا
فلاح
صابر
خدابنده
surp78@yahoo.com
حلیمه
رجبی
جمشید
امیری مقدم
10.22092/isfj.2017.109980
<span>The effects of two levels of vegetable oils on structure of pyloric caeca were studied in Caspian Sea salmon juveniles (Salmo trutta caspius). The levels of dietary vegetable oils comprised of 10% and 20% of total diet and in each level 85% canola and 15% soybean was used. In these experiments, 270 juveniles each weighing 10g were selected, 90 were allocated to the two treatments and 30 for replications and also a control group was considered and fed with commercial food. The juvenile fish were cultured for 8 weeks, fed two times daily and then 6 samples from each treated group were fixed for histological studies. Histological examination under light microscope and using Hematoxylin-Eosin staining was conducted. Results showed that 20% dietary vegetable oil as compared with 10% significantly increased the area and number of pyloric caeca entrocytes. The effect of 20% dietary vegetable oil on the area and number of pyloric caeca entrocytes as compared to the commercial food was not significant. Gap in lumen ceacum was not significant between the two treatments as the lumen diameter increased with increase in dietary oil. We conclude that dietary vegetable oil content at 20% level can increase the area and number of pyloric caeca entrocytes which leads to increase in absorption of nutrients and of higher osmoregulation ability.</span>
VEGETABLE OIL,Histology,Feeding,Salmo trutta caspius
https://isfj.areeo.ac.ir/article_109980.html
https://isfj.areeo.ac.ir/article_109980_bddd2f07d82048058a97e91e2ab370c1.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Stock assessment of the razor clam (Solen brevis Gray, 1832), in Bushehr province coasts, Persian Gulf
123
134
FA
N.
Niamaimandi
nmaimandi@yahoo.com
10.22092/isfj.2017.109981
Stock assessment of edible bivalve, Solen brevis was carried out in Bushehr shoreline areas
(50 21 E - 29 41 N to 52 41 E 27 17 N) throughout the period of September 2008 till
September 2009. The objectives of this study were identifying the distribution, and estimating
the abundance, growth parameters and natural mortality of the bivalve. Solen specimens were
collected monthly in Bupatil area and from three other areas at low tide. On each transect one
or two quadrats (0.25m2) were placed at random. To estimate the stock abundance, the mean
number of shells in each quadrat was regarded as an estimate of stock mean. Length
frequency was used to estimate growth and natural mortality parameters. Data analysis was
conducted with the most recent version of LFDA statistical software.
The main distribution areas for live edible bivalve, Solen brevis, were located at Bupatil,
Gasir, Kaloo, Piazi and Bordekhoon. The mean (±SD) abundance in Bupatil was estimated at
3.25 1.1 shells per quadrat with a maximum peak in October and minimum in August. The
estimated growth parameters of this species was, K = 0.7 Year-1, L = 120 mm and t0 = -0.35.
Natural mortality rate (M) was estimated at 0.26 and the calculated maximum age (Tmax) was
54 months.
biomass,shell,Solen brevis,bushehr,Persian Gulf
https://isfj.areeo.ac.ir/article_109981.html
https://isfj.areeo.ac.ir/article_109981_09244b5f3be439422f72a1168d840867.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Effects of dietary Betaine on growth, survival, body composition and resistance of fry rainbow trout (Oncorhynchus mykiss) under environmental stress
135
146
FA
M.
Niroomand
mohamad_niromand@yahoo.com
M.M.
Sajadi
M.
Yahyavi
maziar_yahyavi@yahoo.com
M.
Asadi
10.22092/isfj.2017.109982
A four-week trial was conducted to evaluate the effects of different levels of dietary
Betaine on growth, survival and resistance to salinity (35ppt), temperature (24 C), hypoxia
and high and low pH stresses in rainbow trout (Oncorhynchus mykiss). Four levels of Betaine
as 0 (control), 0.4% (B0.4), 0.8% (B0.8) and 1.2% (B1.2) were used with three replicates. Forty
fish (0.67±0.15g) were stocked in each replicate and fed at 4-4.5% of body weight, five times
daily. Results showed that there were significant differences in growth, survival, NPU, PER
and FCR between B0.4, B1.2 and control diet (P0.05). Resistances to high and low pH (10.8 & 3.8) and to high temperature
(24 C) were significantly better in fish fed with Betaine containing diets compared to the
control diet. Resistance to high salinity in B0.4 was significantly better than the control diet
and resistance to hypoxia in diet B0.8 was significantly better than the control (P
Immunity system,Rainbow trout,Oncorhynchus mykiss,Environmental stresses,Feeding
https://isfj.areeo.ac.ir/article_109982.html
https://isfj.areeo.ac.ir/article_109982_b2a6fecdedfeef1c8c7c378b09f5bc6b.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Growth pattern and daily growth increment in lanternfish (Benthosema pterotum) of the Oman Sea
147
160
FA
T.
Valinassab
t_valinassab@yahoo.com
P.
Hosseini Shekarabi
10.22092/isfj.2017.109983
Lanternfish (Benthosema pterptum) is one of the most important fish species in the Oman
Sea. We randomly sampled 300 myctophids from different depths in spring and winter 2009
in the Oman Sea using mid-water trawls. Male to female sex ratio was 0.36:0.64. The thin
sections (60-80μm) of sagitta otoliths of the fish were prepared using polishing method. These
sections showed that increment growth rings of lanternfish otolith are formed daily and the
age condition is distinguishable on a daily basis. We found the life span of the species to be
short (with a maximum of 349 micro-increments counted) and probably less than a year. The
relationship between standard length (SL) and daily growth increment (D) was expressed as
the linear equation: SL=0.87D+12.37 (R2=0.97). The relationship between lanternfish weight
(W) and daily growth increment (D) was expressed as power equation: W=0.00003D1.754
(R2=0.95). Furthermore, morphometrical characteristics of otolith including otolith weight
and length and daily growth increment relationships were expressed as linear equation
(R2=0.96 and R2=0.83). The results showed that lanternfish growth rate were in the range
0.241mm/d-1 to 0.138mm/d-1 and decreased by body size and age in this range.
*Corresponding author
Lanternfish,Benthosema pterotum,Otolith,morphometric,Oman Sea
https://isfj.areeo.ac.ir/article_109983.html
https://isfj.areeo.ac.ir/article_109983_b25c74bded928f3dfb8135cf435415b8.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Introducing three species of Echinoids (order Echinoidea) in southern intertidal zone of Qeshm Island, the Persian Gulf
161
164
FA
S.
Izadi
izadi.sahar@gmail.com
A.
Ashja Ardalan
a_ashjaardalan@yahoo.com
H.
Hosseinzadeh Sahafi
h_hosseinzadeh@yahoo.com
M.R.
Shookri
shokri.m@gmail.com
10.22092/isfj.2017.109984
A one-year study (May 2007-April 2008) was undertaken to identify the echinoid species
of intertidal sandy and rocky shores of the Qeshm Island. An intertidal sandy location and a
rocky shore were surveyed in southern coasts of Qeshm Island, in northern Persian Gulf.
Specimens were monthly collected along two 30m wide by 30 60m long (according to the
tidal range) transects located approximately 300m apart, perpendicular to the sea, in each
shore. Sampling was accomplished using 0.25m2 quadrat along each transect in the rocky
shore, and by walking along nine 10Ã10-30m transects along each transect in the sandy shore.
Three species of echinoids, belonging to 3 families were identified including: Clypeaster
reticulatus, Diadema setosum and Echinometra mathaei. Identifications were verified by
National Museum of Natural Science, Taiwan. While Clypeaster reticulatus belongs to sandy
habitats, none of the identified species were observed in sandy location.
*Corresponding author
Echinoderms,Invertebrate,Persian Gulf
https://isfj.areeo.ac.ir/article_109984.html
https://isfj.areeo.ac.ir/article_109984_3876d334e9c9b0373cbf7c3b54267815.pdf
Agricultural Research,Education and Extension Organization
Iranian Scientific Fisheries Journal
1026-1354
2322-5998
20
1
2011
08
23
Evaluation of stocking density on water quality parameters in rearing of Beluga (Huso huso)
165
170
FA
S.
Rafatnezhad
B.
Falahatkar
falahatkar@guilan.ac.ir
10.22092/isfj.2017.109985
The potential effects of stocking densities (1, 2, 4, 6 and 8kg/m-2) of Beluga (Huso huso)
was investigated on water quality and growth factors of the fish. Feed was offered three times
daily using a commercial diet to the juvenile fish at the average initial weight of 93.13±1.04g
(±SE) for a period of 8 weeks. The final biomass was 4.0, 6.5, 11.0, 14.5, 17.1kg/m-2 from the
lowest to the highest densities, respectively. At the termination of the experiment, the mean
weight reached 362.4±6.9, 319.7±2.1, 267±9.2, 242.1±6.2 and 211.1±4.1 in densities of 1 to
8kg/m-2, respectively. Results of the present study showed that growth parameters, including:
Final weight (W), body weight daily (BWD), weight gain (WG), condition factor (CF) and
feed efficiency (FE) had significant differences among the treatments (P0.05). Results showed that stocking densities have major effects on water quality and
growth indices of Beluga juveniles.
Density,Water quality,Growth,Sturgeon
https://isfj.areeo.ac.ir/article_109985.html
https://isfj.areeo.ac.ir/article_109985_6fecc181eb4e7fc7c31f2b55fbd2364e.pdf