ORIGINAL_ARTICLE
Effects of weight and length of Barb us grypus broodstock on fingerlings production and growth
The effects of weight and length of Barbus grypus broodstock on fingerlings reproductive characteristics and growth were investigated. We chose three female treatments including weight and length groups (1) 2212.5±479g, 62.68±6.7cm, (2) 4518±780g, 79.12±4.36cm and
(3) 7712.5±1171g, 92.62±3.13cm. The same male broodstock were used for all the treatments with the weight and length size of 1400±100g, 54.62±7.35cm. Female broodstock were injected 3mg/k:g PG hormone two times at an interval of 10 hours. Males were injected 2mg/k:g once at the time females received their second injection. Larvae and fingerling survival rate and growth indices (special growth coefficient, condition factor) up to the fingerling stage were calculated for all treatments of larvae culture. Fingerling stage in ponds, 02, pH, temperature, transparency, nitrate, and phosphate were measured and no significant difference was observed (P>0.05) among the ponds. The special growth rate, condition factor, and fingerling survival of the treatments showed no significant differences (P>0.05). However, our results indicated that larvae survival rate had significant differences between treatment 2 and other treatments (P<0.05). These indices increase in broodstock weight up to treatment 2 (4518±780g, 79.12±4.36cm) and after that it will be lowered. We conclude that the treatment 2 broodstock are ideal for fingerling survival and enhancement of growth and condition factors.
https://isfj.areeo.ac.ir/article_109935_a7003fc538b0ac1811c3b273bab08fb5.pdf
2010-08-23
1
8
10.22092/isfj.2017.109935
survival
Special growth coefficient
Condition factor
Barbus grypus
Reproduction
F
kahkesh
foroud.kahkesh@gmail.com
1
LEAD_AUTHOR
V
Yavari
2
AUTHOR
G
Eskandary
3
AUTHOR
G
Mohammadi
4
AUTHOR
ORIGINAL_ARTICLE
Assessment of acute effects of Streptococcus faecium on some hematological and histopathological parameters in juveniles rainbow trout (Oncorhynchus mykiss)
Streptococcosis is one of the most important bacterial diseases in cold water fish because of its rapid outbreak specially in summer, relatively high morbidity and mortality, productive reduction and economic losses in aquaculture industry. However, it would be necessary to determine of 50% lethal dose (LD50) of bacteria (Streptococcus faecium) and studying its acute effects on hematological and histopathological parameters. For measuring LD50 five dilutions of bacteria were obtained by Macfarlane method and the fish were injected by intraperitoneal (IP). The experience was carried out in 6 treatments and 3 replicates. The fish were injected by LD50 dose and after 10 days, samples of blood and tissues including: Eyes, brain, kidney, liver and gills were collected. The injected fish showed darkening of body, exophthalmia, abdominal distension and prolapsed anal. The obtained results showed significant reduction (P<0.05) in level of red blood cells (RBC), hemoglobin (Hb), hematocrit (Hct) and significant increase (P<0.05) of mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC) in test group compare to control group. In addition histopathological findings including hemorrhage in brain, eyes, kidney and liver, congestion in liver, brain and gills, inflammation of gills, meningitis and separation of menangial layers, presence of melanin pigments and increasing of mucus cells in the comial epithelium and were showed shrinkage, bowmans space dilation, degeneration and vacoelation in tubular cells, increasing of melanomacrofage centers and melanin pigments in kidney.
https://isfj.areeo.ac.ir/article_109936_6d28e408e8543102e9399f04ea17cfc0.pdf
2010-08-23
9
18
10.22092/isfj.2017.109936
disease
LD50
streptococcosis
Hematology
Histopathology
R
Poorgholam
r_pourgholam@yahoo.com
1
LEAD_AUTHOR
A
Mokarami Rostami
2
AUTHOR
A.A
Saeedi
aliasgharsaeedi@yahoo.com
3
AUTHOR
I
Shrifpour
isharifpour@yahoo.com
4
AUTHOR
A
Ghoroghi
ahmadghoroghi@hotmail.com
5
AUTHOR
H
Pourgholam
6
AUTHOR
ORIGINAL_ARTICLE
Karyotyping of Vimba vimba persa
The chromosome number and type as well as karyotype in Vimba vimba persa were studied. A total of 200 larvae and 10 fingerlings of this species with an average weight of 30.2g obtained from Shahid Ansari fish hatchery. To arrest mitosis in metaphase, larvae under study were placed in a 0.05% solution of colchicine for a period of 6h while the fingerlings were given an intramuscular injection of 0.01% colchicine. The tissues were let to stand in a hypotonic solution of 0.075M KCl and were then treated with a fixative (Carnoy's solution) in three steps. The chromosomes were then stained with 10% Giemsa solution for 20 min (larvae) and 30 min (fingerlings) and examined under a light microscope. 100 metaphase plates were studied in V. vimba persa larvae and 200 metaphase plates were studied for fingerlings. Based on the count of 300 metaphase plates 74.67% showed 2n=50, 14.67% showed 2n=48 and in 4.67% 2n=49. Based on statistical analysis the chromosome number in this species was calculated as 2n=50 (49.54±0.11) and the number of chromosome arms (NF) was determined as 90. Appropriate metaphase plates were photographed in order to prepare karyotype. The size of the chromosomes (short and long arms), relative length of chromosome and centromere index was calculated. By arranging homologous chromosomes beside each other the chromosome formula was calculated as 7 pairs of Metacentric, 13 pairs of Sub Metacentric and 5 pairs of Sub-Telocentric or Acrocentric chromosomes (7M±13Sm±5St/A). On the basis of the number and type of chromosomes, the karyotype obtained for this species was similar to that for other species belonging to the same genus.
https://isfj.areeo.ac.ir/article_109937_1cebbda091adb578aa20dd527bb54a87.pdf
2010-08-23
19
30
10.22092/isfj.2017.109937
Chromosome
Vimba vimba persa
Cytogentic
Caspian Sea
F
Kazerooni Monfared
1
AUTHOR
F
Bagherzadeh
2
AUTHOR
M.R
Nowruzfashkhami
3
AUTHOR
M
Pourkazemi
pourkazemi@sturgeon.ir
4
LEAD_AUTHOR
ORIGINAL_ARTICLE
Spawning season and fecundity of Sepia pharaonis In Bushehr coastal waters (Persian Gulf)
Fecundity rate and spawning season for cuttlefish (Sepia pharaonis), a commercially important species in Busheher coastal waters were studied from December 2007 to May 2008. We collected 142 specimens and after their sexuality were 18 males, 3 immatures, 16 first stage pieces, 14 second stage pieces and 91 pieces in third and fourth stages. The assessed biological characteristics such as: Mantle length, weight of total body, Nidamental gland, weight of head, weight of ovary and fecundity rate. We recorded 201.8±6.8mm for mean, 280mm for maximum and 115mm for minimum mantle length. The mean body total weight was 895.8±143g, and the maximum was 2098g, while its minimum was 241.13g. The mean, maximum and minimum Nidamental gland weight was 41.1±18.6, 126.8, and 0.2g, respectively. For the relationship between mantle length (ML, mm) and fecundity we found the linear regression equation: Fecundity = -630.68+5.22ML. The mean, maximum and minimum fecundity rate was 494±131, 1246 and 178, respectively. The results ofthis study showed spawning season for Sepia pharaonis in the coastal waters of Busheher Province to be from the end of February to the end of June.
https://isfj.areeo.ac.ir/article_109938_55331539b17e856f75428e5524bf4159.pdf
2010-08-23
31
38
10.22092/isfj.2017.109938
Cuttlefish
Sepia pharaonis
SPAWNING
biology
Perisan Gulf
R
Khodadadi
khodadadi_ra@yahoo.com
1
LEAD_AUTHOR
M
Yahyavi
maziar_yahyavi@yahoo.com
2
AUTHOR
R
Ghorbani
3
AUTHOR
M.J
Shabani
4
AUTHOR
ORIGINAL_ARTICLE
Biological role of northern pike, Esox lucius (Linneaus 1758) in control of aquatic pests in carps culture ponds
The effects of northern pike, Esox lucius, in controlling coarse fish and other pest organisms and enhancing harvest size in carp ponds was investigated. We used two treatments and one control each with three replicates. The pike density was 200 and 500 fish individuals per hectare for the first and second treatments, respectively and the control pond had no pike. The carp density in ponds was 3500 individuals per hectare and stocking rates were 55% silver carp, 20% common carp, 10% bighead carp and 15% grass carp. Survival rate of the northern pike in treatments 1 and 2 was 43.8 and 40%, respectively.
The results showed that the mean (±SO) biomass of unwanted fishes (13 species) in the control treatment was 358.8±55.4kg/h and in the first and second treatments were 74.2±6.3 and 92.2±10.9kg/h, respectively in the end of the trial period. So unwanted fishes biomass reduced by 79.3% and 74.3% in the two treatments, respectively. Stomach investigation showed that the pike fed mostly on frog juveniles and some pest fishes like Hemiculter leucisculus, Pseudorasbora parva, Carassius auratus, and few Macrobrachium and aquatic insects. Also, the average biomass of unwanted fishes like Carassius auratus, Hemiculter leucisculus, Alburnus alburnus and Pseudorasbora parva of the first and second treatments in comparison to control showed a reduction of94, 88.9, 62.4 and 56.82 percent, respectively. A significant difference was found in the final mean weight of common carp between treatments and control ponds (P<0.05), as the weight of common carp in treatments ponds was 220% more than the control pond. Also, Esox lucius with controlling coarse fish increased cultured fish (such as common carp, grass carp, silver carp and bighead carp) production by about
17.9%.
https://isfj.areeo.ac.ir/article_109939_7f537c3cff1ad35c17f5e11df271e616.pdf
2010-08-23
39
50
10.22092/isfj.2017.109939
Esox lucius
biological control
Unwanted aquatic organisms
Increase in production
A
Khaval
ali_khaval@yahoo.com
1
LEAD_AUTHOR
K
Abbasi
kayvan_abbasi@yahoo.com
2
AUTHOR
A
Valipour
valipour32@yahoo.com
3
AUTHOR
ORIGINAL_ARTICLE
Nutritional value of Jack knife clam Solen dactylus in the ripeness and sexual rest stages
In this study, 60 specimens of Jack knife clam Solen dactylus (Von Cosel, 1989) were collected randomly in autumn 2007 and spring 2008 from 5 stations (intertidal pools) in Golshahr coast of Bandar Abbas, Persian Gulf.
After sampling, specimens were frozen and transferred to the laboratory for further biometric parameters measurements. The mean (±SD) anterior- posterior length in autumn and spring were 78.92±17.72 and 77.37±16.20mm, respectively. The mean (±SD) total weight was 9.53±4.88g in autumn and 8.43±4.46g in spring. Moisture, ash, protein and total lipid in soft tissues of clams were measured. These parameters in autumn and spring were 80.23 ± 0.70, 3.42±0.02, 11.3±0.10, 0.86±0.01% and 76.16±1.75, 2.3±0.07, 11.79±0.05, 0.55±0.02%,respectively.
The values of moisture, ash and total lipid were higher in autumn (ripeness stage) compared to spring; whereas, the value of protein in autumn was slightly lower than spring. There was no significant difference between the mean of moisture before and after the spawning (P>0.05). The mean ash, protein and total lipid showed a significant difference in the two seasons (P<0.05).
https://isfj.areeo.ac.ir/article_109940_f14a713e35583f5164d49da8c126d3c3.pdf
2010-08-23
51
58
10.22092/isfj.2017.109940
Mollusc
Food composition
Persian Gulf
Iran
H
Saeedi
hanieh.saeedi@gmail.com
1
LEAD_AUTHOR
A
Ashja Ardalan
a_ashjaardalan@yahoo.com
2
AUTHOR
ORIGINAL_ARTICLE
Tintinnida order in Oman Sea (Hormuz Strait to Pasabandar) Sanjarani M.
This study was conducted for identification and introduce of Tintinnida order in Iranian waters of Oman Sea from Hormuz Strait to Pasabandar, Chabahar, in 2007. Ten transects each with four fixed stations had been chosen. Samplings were conducted in two seasons before and after monsoon. Depth of sampled stations in the studied area varied from zero to 20m and 20 to 50m and in station one because oflow depth (5m) sampling carried out just one time.
We identified a total of 16 genera of Tintinnida from ten families. These composed of 4 genera belonging to family Tintinnidae, 2 genera from family Xystonellidae, Ptychocylidae and Rhabdonellidae. Familes Tintinnidiidae, Codonellidae, Epiplocylididae, Dictyocystidae, Metacylididae and Ascampbeliellidae were each represented by only one genus. Tintinnopsis from Codonellidae was the most abundant composing 54% of the samples and Epiplocyloides from Epiplocylididae with 0.01% was the least abundant.
The most frequent genera of Tintinnidae included: Eutintinnus, Amphorellopsis, Salpingella and
Dadayiella.
https://isfj.areeo.ac.ir/article_109941_96175240d0eb7e23e7a064e27baf83c6.pdf
2010-08-23
59
66
10.22092/isfj.2017.109941
Tintinnidae
Unicellular
Oman Sea
M
Sanjarani
msanjarani.ifro@gmail.com
1
LEAD_AUTHOR
ORIGINAL_ARTICLE
Reproduction and feeding biology of Madagascar Meager (Argyrosomus hololepidotus) from Khuzestan coastal waters
Biological attributes of Madagascar Meager (Argyrosomus hololepidotus) was studied from October 2008 to September 2009 in coastal waters of K.huzestan province. Average maximum length was 128.4±7.50 in October and average minimum length was 104.86±12.47 in May. The maximum weight was 27500g, the minimum weight was 5700g and mean weight for males and females were 15.222±4.40 and 16.942±5.09, respectively.
Reproductive studies showed that peak maturity season occurred in July. The length
weight relationship were calculated as W=0.042L 2 70 for males and W=0.06L2 61for females.
The male-female sex ratio was calculated as 1:1.07 and chi-square analysis showed no significant difference (P>0.05) between the two sexes. The average absolute and relative fecundity were estimated to be 4054045±37265 and 179.19±50.41, respectively Madagascar Meager is carnivore and we found the diet ofthe species consisted offish (75%), crustaceans (20%) and mollusks (5%). Analysis of monthly variation in the condition factor (Kn) indicated a fluctuation throughout the year, with a high level during May. Vacuity index indicated a higher feeding rate in males compared to females. We also found that the species continues feeding in the spawning season.
https://isfj.areeo.ac.ir/article_109942_d11c383a1a2ccab694c26e0878253eb4.pdf
2010-08-23
67
76
10.22092/isfj.2017.109942
Argyrosomus ho/olepidotus
Biological attributes
Persian Gulf
M
Shekari
1
AUTHOR
A
Savari
savari53@gmail.com
2
AUTHOR
J
Ghofleh Maramazi
jmarammazi@yahoo.com
3
AUTHOR
G
Eskandari
4
AUTHOR
M.T
Ronagh
5
AUTHOR
A.R
Hashemi
6
AUTHOR
K
Darvish Bastami
darvish_60@yahoo.com
7
LEAD_AUTHOR
M
Sinaie
8
AUTHOR
M.T
Kashi
9
AUTHOR
ORIGINAL_ARTICLE
Effects of fish meal replacement by silkworm pupae on growth, survival and body chemical composition of rainbow trout (Oncorhynchus mykiss)
Silkworm pupae meal is a non-conventional animal protein feedstuff. It is the by-product after the silk thread has been wound off from the cocoon. To investigate the effects of animal protein on growth and survival of rainbow trout (Oncorhynchus mykiss), a sixty-day feeding experiment was conducted. Four replacement levels (0, 5, 10 and 15 percent) of silkworm pupae meal were compared using a completely random design. We used 360 juvenile rainbow trout (average weight 55±3.42g) divided into 4 groups and 3 replications, each containing 30 trout for 60 days. Sampling for nutritional effects was carried out every 10 days and at the end of the experiment, weight gain, feed conversion ratio, specific growth rate, protein and efficiency ratio were compared which showed no significant differences (P>0.05) among the treatments. Total length and survival rate were not significantly affected in the treatment groups. The highest percentage of carcass protein and the lowest percentage of carcass fat belonged to the control treatment. Our fmdings showed that silkworm pupae meal could replace 15% of fish meal diet in rainbow trout culture.
https://isfj.areeo.ac.ir/article_109943_e294592d76280f23a24688be7072cec8.pdf
2010-08-23
77
84
10.22092/isfj.2017.109943
Nutrition
Feed Conversion Ratio
protein
Growth
Rainbow trout
M
Tavoli
1
AUTHOR
M
Shakoori
matin.shakoori@yahoo.com
2
LEAD_AUTHOR
A.A
Motallebi
motalebi@ifro.ir
3
AUTHOR
H
Gholipoor Nozari
4
AUTHOR
S
Naseri
5
AUTHOR
ORIGINAL_ARTICLE
Comparison of muscular tissue concentration of heavy metals in Sharpnose stinger (Himantura gerrardi) and Bigeye scade (Selar crumenophthalmus) of the Persian Gulf
We assessed concentration of heavy metals (Cu, Fe, Hg and Zn) in the muscular tissue of benthic species Himantura gerrard and pelagic species Selar crumenophthalmus caught from the Persian Gulf during winter 2008. After biometrical measurements, the muscle tissues of 51 randomly selected samples were separated from 86 stations. Specimens were digested using the wet method and the concentrations of Cu, Fe and Zn were determined using Atomic Absorption Spectrophotometer (flame method) and also concentration of mercury was determined using Mercury Analyzer device. The mean concentration of heavy metals in muscle tissues of Himantura gerrardi were as follows: Fe: 74.78; Hg: 0.77; Zn: 875.99 and Cu: 3.5. However, these values for muscle tissues of Selar crumenophthalmus were: Fe: 25.07; Hg: 0.20; Cu: Zn: 15.54 and Zn: 2.31f.lglg dry weight. Results showed that concentration of the selected heavy metals in H gerrardi, were significantly higher than S. crumenophthalmus (P O.OS).
https://isfj.areeo.ac.ir/article_109944_5cdbfd2bd943d7d0020c5d828ac6d529.pdf
2010-08-23
85
94
10.22092/isfj.2017.109944
Pollution
Fish cartilage
Bony fish
Persian Gulf
F
Shahab Moghadam
f.shahab@modares.ac.ir
1
LEAD_AUTHOR
A
Esmaeili Sari
2
AUTHOR
T
Valinassab
t_valinassab@yahoo.com
3
AUTHOR
M
Karimabadi
4
AUTHOR
ORIGINAL_ARTICLE
Muscular concentration of cadmium and lead in carp, mullet and kutum of the Gorgan Bay, Caspian Sea
We assessed muscular concentration of cadmium and lead in carp, mullet and kutum of the Gorgan Bay in south-east of the Caspian Sea. Atomic absorption was used in the process for 90 specimens of the three fish collected during September 2006 to March 2007. The average concentration of lead in the three fish (carp, mullet, kutum) were 0.242, 0.118 and 0.08ppm (Mg/Kg and for cadmium were 0.014, 0.018 and 0.017ppm (Mg!Kg), respectively. One-way analysis of variance (ANOVA) showed no significant difference in concentration of cadmium for the fish species (P=0.251) while this difference was significant for lead (P<0.007). Tukey test showed significant difference for lead concentration between carp and mullet (P=0.028) and also between carp and kutum (P=0.01) but this difference was not significant between mullet and kutum (P=0.927). Pearson's test showed no significant statistical correlation between lead and cadmium concentrations in the selected fish species (P=0.557). Also t-test showed that the average concentration of cadmium and lead in the fish species are significantly lower than the accepted standard levels (P<0.001) set by WHO and are thus appropriate for human consumption.
https://isfj.areeo.ac.ir/article_109945_2489f4a519494d61bd615b8b43088949.pdf
2010-08-23
95
100
10.22092/isfj.2017.109945
heavy metals
Fish
Golestan Province
Caspian Sea
A
Shahryari
al_shahryar@yahoo.com
1
LEAD_AUTHOR
K
Golfirozy
2
AUTHOR
S
Noshin
3
AUTHOR
ORIGINAL_ARTICLE
An analysis of final costs components in rainbow trout (Onchorynchus mykiss) farming sector in Iran
In Iran, the rainbow trout (Onchorynchus mykiss) production has raised from 550 tonnes in 1990, to 1,332 tonnes in 1995 and reached a peak in 2009 with more than 62,000 tonnes of cultured fish. All provinces, particularly those located in the main mountain ranges, Alborz and Zagros areas have targeted the culture recently and the practice has undoubtedly seen great successes over the last decade. Although the potential of trout culture expansion is apparent, it is constrained by market demand and producer profitability. In Iran, trout is widely sold and used fresh and some forms of value additions may also be observed. To know the production costs and their evolution is essential to the development and management of a trout farm. The characteristics of the trout farming industry are quite different, from extensive to highly intensive farms production of 3 tonnes per year to farms with more than 150 tonnes. A study of production, costs and profitability was carried out to help clarify trout production costs and their difference with location and farm size. Over the years 2005-2006, a total of 60 farms from the ten main provinces were randomly selected, classified and studied. The results of the survey showed that the various producer provinces have different cost structures. Overall, feed with the highest level of variation accounted for 51% of total costs, followed by labour costs (11%) and larvae costs (11%). By 2005, total production costs averaged IRRial 117,800 per kg (US$ 1.98) in Iran. The costs sensitivity analysis shows feed costs is the most sensitive and 50% reduction in feed costs can decline more than 25% of the total fish cost per kilogram. On average, the larger farms were more efficient and had better conditions with averaged costs of IRRial 16,452 per kg (US$ 1.69).
https://isfj.areeo.ac.ir/article_109946_89d8fd9800111462637458d4fd7ff27b.pdf
2010-08-23
101
114
10.22092/isfj.2017.109946
Economics
trout
Farm
Inputs cost
Iran
H
Salehi
hsalehi_ir@yahoo.com
1
LEAD_AUTHOR
A
Khoosravanizadeh
2
AUTHOR
ORIGINAL_ARTICLE
Effect of different salinity on ions, osmolarity, water concentration of body tissue, gill chloride cells and mortality percentage of juveniles of Caspian roach (Rutilus frisii kutum Kamensky 1901)
Changes of ions (Na+, cr, K+), osmolarity and water concentration of body tissue, size and number
of gill chloride cells as well as mortality percentage of the juveniles Caspian roaches in weight groups of0.2, 0.5 & 1g water satiny stress were studied. The salinities tested were 0 (fesh water), 7, 12.5 &
16g/lit and the assessments were completed 0, 12, 24, 48 & 72 hours after exposure. Results showed that ions and osmolarity of juveniles weighting 0.2 & 0.5g in salinities of 0 up to 12.5g/lit increased significantly during the first 12 hours (P'<0.05). These values then showed downwara trend to the values recorded for fresh water. Water concentration of body tissue reached the minimum mean value in 12 hours (P<0.05) in salinity of 12.5 g/lit and then showed upward trend to the value obtained for freshwater. Ions and osmolarity of body tissue of the juveniles mcreased and water concentration of body tissue decreased significant after the first 12 hours of transferring into salinity of 16g/lit (P<0.05). Weight changes in juveniles of 1g in salinities of 0 up to 16g/lit was similar to juveniles of
0.2 & 0.5g in salinities of 0 up to 12.5gllit and the maximum mean vafues of ions and osmolarity and
the minimum value of water concentration body tissue in 16g/lit salinity in hour 12 (P<0.05). Size and number of gill chloride cells of juveniles weighting 0.2 & 0.5g in salinities of 0 up to 12.5g/lit increased significantly during the first 12 hours of exposure (P<0.05) and reached the maximum mean
values in 12.5g/lit salinity 12 & 24 hours after exposure, respectively (P<0.05) and showed invisible changes up to the end of the test. Size and number of choride cells of the juveniles increased after the first 12 hours of transferring into salinity of 16g/lit (P<0.05). Changes of the indices in juveniles weighting 1gin salinities of 0 up to 16g/lit was similar to juveniles of 0.2 & 0.5g kept in salinities of 0 up to 12.5gtlit and the maximum values was in 12 and 24 hours after exposure, respectively (P<0.05). Ions and osmolarity of body tissue and size and number of chloride cells increased significantly with increase of salinity and wetght and water salinity and water concentration of body tissue decreased significantly with mcrease in water salinity and increased in fish weight (P<0.05). Juveniles weighting
0.2 up to 1g showed no mortality in salimties of 0 & 7g/lit during tfie test. Mortality of the juveniles
weighting 0.2, 0.5 and 1g/1it increased during the first f2 hours and became constant to the end of the
test. Mortality of juvenTies weighting 0.2 & 0.5g in salinity of 16gllit was similar to that of the juveniles weighting 0.2 & 0.5f in salimty of 12.5g/lit. Mortality of the JUVeniles increased significantly with increase of salinity and decreased with increase of weight (P<0.05).
https://isfj.areeo.ac.ir/article_109947_beda379e14c27bc9d8dd55d91bdf2d19.pdf
2010-08-23
115
130
10.22092/isfj.2017.109947
Osmoregulation
Osmolarity
Ion
Chloride cell
Rutilusfrisii kutum
weight
Salinity
B
Ataimehr
babakataimehr@yahoo.com
1
LEAD_AUTHOR
B
Mojazi Amiri
bmamiri@ut.ac.ir
2
AUTHOR
A
Mirvaghefi
3
AUTHOR
S
Nezami
shabanalinazami@yahoo.com
4
AUTHOR
G
Riazi
5
AUTHOR
ORIGINAL_ARTICLE
Biodiversity of benetic invertebrates in Aras River
Benthic invertebrate species and their change was studied in Aras River during a hydro- biological research on the middle and terminal parts of Aras River that spanned the years 1995-1996 and 2005-2006. We found 91 species of benthic invertebrates ofwhich 85 species were identified during 1995-1996 and 49 species during 2005-2006. The highest rate of biodiversity was seen in molluscs with 19 species and chironomid larvae with 17 species. Forty-two species had wide distribution and the remaining occurred only in special habitats. The biomass of invertebrates reduced from the upper reach of the river to the middle and lower reaches because of the changes in river bed from soil to sand. It is concluded that the formation of different habitats in different sections of the Aras River has a crucial role in the change observed in biodiversity of the benthic invertebrates.
https://isfj.areeo.ac.ir/article_109948_de87ea51da51bdc090b25d87de202173.pdf
2010-08-23
131
142
10.22092/isfj.2017.109948
Biodiversity
Invertebrates
Aras River
A
Aliyev
1
AUTHOR
R
Ahmadi
a_ahmadi@ifro.ir
2
LEAD_AUTHOR
ORIGINAL_ARTICLE
Identified fishes of Kol River in Hormuzgan Province
Kol River drains into the Persian Gulf and its watershed encompasses areas in Hormozgan, Kerman and Fars provinces. Identification of fish species of the river was conducted seasonally from summer to winter 2005. We selected 8 sampling stations based on the height of sea level from branches of Kol River near estuary. Totally, 160 specimens were caught with gillnet, cast net and hook. We identified 12 species, 12 genera, 7 families and 5 orders. The most diverse family was Cyprinidae represented by 5 species and 5 genera. In this family, Cyprinion watsoni was caught in 6 sampling stations and Cyprinus carpio species in only one station. Close to estuary, we found marine fish species such as mudskipper of Gobiidae, milk fish of Chanidae, ladyfish of Elopidae, and two species of Mugilidae families. The latter two species of Mugilidae were not seen in other stations. Of the identified species, Iranocichla hormuzensis, Garra persica and Schistura sargadensis were endemic and Cyprinus carpio was considered exotic.
https://isfj.areeo.ac.ir/article_109949_8671707f663dc5cfe5762ea627f2709d.pdf
2010-08-23
143
148
10.22092/isfj.2017.109949
Fish
diversity
Kol River
Honnuzgan province
A
Bagheri
arash.bagheri@gmail.com
1
LEAD_AUTHOR
E
Kamrani
ezas47@gmail.com
2
AUTHOR
H
Esmaeili
3
AUTHOR
ORIGINAL_ARTICLE
Non-commercial fish species in by-catch composition of shrimp trawl landing from Mahshahr creeks
Non-commercial fish species of shrimp trawls were studied monthly from October 2005 to September 2006 in Mahshahr creeks (Darvish, Doragh, Bihad, Ghazaleh, Ghanam, Zangi and Patil). The trawl nets had a cod-end mesh size of 24mm. Total catch was 6431 individuals weighing 55.5kg, and included 14 species of non-commercial fish species belonging to 14 families. The caught shrimp species were from Penaeidae; comprising only 30% of the total catches (4506 individuals weighting 44kg). Dominant species were Lieognathus hindus (54.8%), Metapenaeus affinis (18.2%) and Parapenaeopsis stylifera (9.8%). Maximum fish abundance was observed in March 2005 (98/3%) and for shrimp in June (66.2%). Bihad creek had the maximum percentage of fish (91.8%) by-catch and shrimp (42.9%) abundance. We conclude that the by-catch percentage of non-commercial fish is higher than shrimps in the study areas. Warm months witnessed the highest abundance of shrimp while January-March was the time period when by-catch was most abundant.
https://isfj.areeo.ac.ir/article_109950_1de1bbb936f53bff535f7664728a27ab.pdf
2010-08-23
149
153
10.22092/isfj.2017.109950
Fishing
By-catch
Trawl
Mahshahr
S
Nikoo
sa.nikoo83@yahoo.com
1
LEAD_AUTHOR
A
Savari
savari53@gmail.com
2
AUTHOR
P
Cochnian
3
AUTHOR
S
Dehghan Medise
4
AUTHOR
S
Saki
5
AUTHOR