eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
1
14
10.22092/ijfs.2018.114765
114765
Lead contamination in fishes of the Kor River
M. Ebrahimi
mebrahimi14@yahoo.com
1
M. Taherianfard
2
M.M. Rafiee
3
Lead concentration in muscle, liver, kidney, brain and gonad tissues of two cyprinid fishes, Cyprinus carpio and Copoeta spp., from three sections of the upper, middle and lower parts of the Kor River was evaluated in 2006. Totally 225 specimens were caught for this purpose (75 specimens from each zone). Tissue samples were digested in acid and their lead concentrations were assayed by ICP method. Statistical analysis of data showed significantly (p<0.05) higher concentrations of lead in the mid zone than the two other zones. No significant differences (p>0.05) were seen between sexes and species. The same pattern of contamination was also observed in water and sediment samples from three sampling zones. The maximum amount of lead measured in this study (1.85mg/kg), was, however, less than the maximum allowance in fish tissues by European :union:s.
https://jifro.areeo.ac.ir/article_114765_43825b9567c49dad4a013159f9bdc8c6.pdf
Lead
Fish
Contamination
Kor River
Fars province
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
1
14
10.22092/ijfs.2018.114792
114792
Effects of n3-HUFA enriched Daphnia magna on growth, survival, stress resistance, and fatty acid composition of larvae of Persian sturgeon (Acipenser persicus)
A.M. Abedian Kennari
aabedian@modares.ac.ir
1
M.R. Oveisipour
2
R.M. Nazari
3
Effects of Daphnia magna enriched with cod liver oil (CLO) as a source of highly unsaturated fatty acid (HUFA) on growth, survival, stress resistance, and fatty acid composition of the Persian sturgeon larvae were evaluated. Daphnia enriched for three different time periods (3, 6, and 9 hours) and non-enriched Daphnia were fed to the Persian sturgeon larvae (average weight 61.6±0.4mg) during 14 days. The highest n3-HUFA content was found in Daphnia enriched for 9 hours (0.69mg g-1 DW) and the highest n3-HUFA content of the larvae was also found in those larvae fed with Daphnia enriched for 9 hours (2.39mg/g-1DW). A significant growth difference between larvae fed with enriched and non-enriched Daphnia was observed (p<0.05), while survival rate did not significantly differ among the treatments (p>0.05). Furthermore, the highest pH stress resistance was found in those larvae fed with Daphnia enriched for 9 and 6 hours (p<0.05). A salinity stress test did not show significant differences among the treatments.
https://jifro.areeo.ac.ir/article_114792_85af0f28aab3998b89559d9f62241ea2.pdf
LIVE FOOD
DAPHNIA
Persian sturgeon
Enrichment
n3-HUFA
Growth performance
Fatty acids composition
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
15
26
10.22092/ijfs.2018.114766
114766
Karyological study on bighead goby (Neogobius kessleri) from southern part of the Caspian Sea
A.H. Esmaily
1
M.R. Kalbassi
kalbassi_m@modares.ac.ir
2
Karyological characteristics of bighead goby (Neogobius kessleri) in the Caspian Sea were studied by examining 30 metaphase chromosome spreads from the kidney tissue of 10 specimens. The chromosome number of this species was found 2n=46 and the arm number as NF=46. The prepared karyotype of this species consisted of 23 pairs acro-telocentric (a-t) chromosomes. The chromosomal formula can be stated as 2n=46 (a-t). Karyological parameters showed that relative length was between 2.34-7.04 and length variation range of chromosomes was between 1.67-5.01 and total length was 71.16µm. It was found that the best chromosomal spread quality were obtained from intraperitonial injection of 40µg/g colchicine for 5 hours, hypotonization of samples in%1 sodium tri-citrate solution in 4ºC and preparation of spreads on cooled slide with flame technique.
https://jifro.areeo.ac.ir/article_114766_e587954ec38c33fcaf1db3eb60f4e250.pdf
Chromosome
karyology
Bighead goby
Neogobius kessleri
Caspian Sea
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
15
26
10.22092/ijfs.2018.114793
114793
Incidence of white spot disease (WSD) in Penaeus indicus farms in Bushehr Province, Iran
M. Afsharnasab
mafsharnasab@yahoo.com
1
A. Dashtyannasab
2
V. Yeganeh
3
M. Soltani
4
The incidence of white spot disease in farmed Penaeus indicus in Busheher region was evaluated by analyzing 200 shrimp individuals between June and September, 2005. The samples were examined for clinical sign including observation of white spots on the cuticle and tissue. Samples were processed using polymerase chain reaction (Nested-PCR) test. The results showed that 24% of the samples examined were clinically positive having white spots on their cuticles. Also, 92% of the samples examined were positive in PCR examination. Furthermore, 70% of apparently healthy shrimp were positively identified using the by PCR test.
https://jifro.areeo.ac.ir/article_114793_a51577eb9edaeb6a7ec41388aa108353.pdf
Incidence
WHITE SPOT DISEASE
Penaeus indicus
Nested PCR
Clinical sign
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
27
46
10.22092/ijfs.2018.114767
114767
Investigating non-compliance behavior with fisheries regulations in the Persian Gulf
D. Karimi
daryoush1339@yahoo.com
1
K. Kuperan
2
F. Eslami
3
Non-compliance with fishing regulations by Iranian fishermen in three provinces of Khuzestan, Bushehr, and Hormozgan along the Persian Gulf was investigated. Using a questionnaire and a stratified random sample method, a total of 566 fishermen were interviewed. The legitimacy variables (outcome and process) that can explain the observed noncompliance with zoning regulations for the shrimp fishery were examined. A Tobit econometric technique was used to estimate the violation decision by Iranian fishermen in the study area. The model was classified into two types: the basic model and the extended model. The key results indicate that one of the factors influencing fishermen to violate the regulation is the differential in the potential income between shrimp fishing zone and other areas. The results also indicate that the moral judgment variable (MCODE) and exogenous variables of probability of detection and conviction play a key role in the violation decision of fishermen. In general, the extended model using an exogenous determinant of probability of detection and conviction in the Tobit estimation technique gave better results than the enriched model using raw probabilities.
https://jifro.areeo.ac.ir/article_114767_de4f7e88854680eac18d03b765699359.pdf
Fisheries management
Regulation
Legitimacy
Persian Gulf
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
27
46
10.22092/ijfs.2018.114794
114794
Induction of tetraploidy in transgenic tilapia (Oreochromis niloticus) using physical shocks
H. Farahmand
hfarahmand@ut.ac.ir
1
S.H. Abdul Razak
2
G.L. Hwang
3
N. Maclean
4
M.A Rahman
5
The induction of tetraploidy by means of cold, heat and multiple heat shock treatments was investigated on male fish from a growth-enhanced transgenic tilapia C118 line, crossed with wild type females. After the development a new multiple heat shock protocol (two heat treatments at 41oC in 60 and 80 min. after fertilization for 5 min. per each), chromosome and X-gal in situ staining assays demonstrated the successful production of yolk sac tetraploid transgenic tilapia in two out of 15 embryos examined in this trial via direct correlation between higher level of b-galactosidase expression and karyotyping in the samples verifying complete tetraploidy in this line. In the grown fish, there was evidence to suggest mosaicism or perhaps tetraploidy in at least two grown fish using the measurement of erythrocytes and karyotyping of the G1 offspring (p<0.05). There was, however, no evidence to indicate successful production of triploid G1 individuals following crossing of induced fish with wild type.
https://jifro.areeo.ac.ir/article_114794_62eb1595887b6f3b5ccd6c9eca12dd10.pdf
Transgenic tilapia
Oreochromis niloticus
-galactosidase
TETRAPLOIDY
LacZ reporter gene
sterility
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
47
58
10.22092/ijfs.2018.114768
114768
Roles of natural zeolite (clinoptiolite) as a bed medium on growth and body composition of red tilap (Oreochromis sp.) and lettuce (Lactuca sativa var longifolia) seedlings in a pisciponic system
Gh.R. Rafiee
rafiee@nrf.ut.ac.ir
1
Ch.R. Saad
2
Natural zeolite was used as a bed medium for plantation of lettuce seedlings and its effects on growth and chemical composition of red tilapia and lettuce were investigated in a pisciponic system. The place of study was the Aquatic Resources Technology Laboratory, Faculty of Agriculture, at the University Putra Malaysia, in 2002. The mean individual weight and biomass of fish in the treatment with zeolite were significantly higher (P<0.05) than the control at the end of experimental period. Use of zeoilte as bed media to plant lettuce seedlings significantly (P<0.05) increased the yield of lettuce. The yield of lettuce in zeolite bed medium and control treatments were 1507±83 and 275±48g, respectively at the end of the experiment. The percentage of protein, fiber and ash in the dry weight of fish were not significantly different (P>0.05) between treatments. The percentage of ash in the dry weight of lettuce in the control was significantly (P<0.05) higher than the zeolite bed medium group. It was concluded that the use of zeolite as bed medium to plant lettuce seedlings could improve culture system performance due to its positive effects in lettuce growth.
https://jifro.areeo.ac.ir/article_114768_1c49c4817acd6f28608094974eefc21b.pdf
Pisciponic system
chemical composition
Lettuce
Red tilapia
Bed medium zeolite
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
47
70
10.22092/ijfs.2018.114795
114795
Poulations dynamics and stock assessment of common kilka (Clupeonella cultriventris caspia ) in Iranian waters of the Caspian Sea
H. Fazli
hn_fazli@yahoo.com
1
C.I. Zhang
2
D.E. Hay
3
C.W. Lee
4
A.A. Janbaz
5
M.S. Bourani
6
This paper examines the changes in the population biology and biomass of common kilka (Clupeonella cultriventris caspia) in the Iranian waters of the Caspian Sea from 1995-2004. For most years during this 10-year period, we estimated the age structure of the catch, length-weight relationship, von Bertalanffy growth parameters, condition factor, sex ratios, maturity stages determined from ovarian analysis, natural and fishing mortality, age at first capture and biomass. Growth parameters were estimated as L¥=132mm, K=0.259/yr, t0=-1.285/yr. The instantaneous coefficient of natural mortality was estimated at 0.506/yr and the instantaneous coefficient of fishing mortality varied during the 10-year period between 0.125/yr to 1.487/yr. Biomass of the common kilka increased from about 16,000mt in 1995 to more than 41,000mt in year of 2002. This increase in common kilka was simultaneous with a sharp decline in anchovy kilka, changes in zooplankton abundance and composition, and especially increase in zooplankton species used by common kilka. We concluded that at the present time, the stock of common kilka is being over-fished.
https://jifro.areeo.ac.ir/article_114795_16159276ad94acbf9e5b3a1d16ba0fd4.pdf
Clupeonella cultriventris caspia
Growth
Maturity stages
STOCK ASSESSMENT
Caspian Sea
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
59
72
10.22092/ijfs.2018.114769
114769
Cost factor analysis of Caspian salmon (Salmo trutta caspius Kessleri, 1877) fingerling production and release in Iran
H. Salehi
hsalehi_ir@yahoo.com
1
Iran contributes to the stock enhancement of several economically valuable fish species, including the Caspian salmon, S. trutta caspius, by producing and releasing millions of fingerlings into the sea. This work was conducted to determine the production costs of the Caspian salmon fingerlings in the years 2002 and 2003. For this purpose, a questionnaire was prepared and filled in by an expert team using data available in the Kelardasht Caspian Salmon Hatchery and other related departments. Among various expenditures, on average, cost of labor (52%) and cost of feed (16%) had the greatest share. Results showed the average cost of production and release of a single fingerling in Iran was IRRls 6,685, (US$ 0.84) over the 2002-2003. The cost sensitivity of hatcheries production of the Caspian salmon shows that labor cost is the most sensitive, and a 50% increase in the cost of this item increases the total coast by more than 25% followed by feed cost.
https://jifro.areeo.ac.ir/article_114769_fbd2135bc724995115159f886865b4e1.pdf
economic analysis
Caspian salmon
Costs
Stock Enhancement
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
71
88
10.22092/ijfs.2018.114796
114796
Branchial chamber structure and osmoregulatory function in the prawn, Palaemon elegans (Crustacea: Decapoda) from the Caspian Sea
S. Khodabandeh
surp78@yahoo.com
1
A. Golzari
2
The structure, ultrastructure and osmoregulatory function of the branchial chamber were investigated in Palaemon elegans (Rathke, 1837) by light microscope, electron microscope and immunohistochemistry methods, respectively. Each chamber possesses a branchiostegite, 3 epipodites and 8 phyllobranchiate gills. The lamellae are attached along the two outer surfaces of the triangular gill axis. Ultrastructurally, numerous ionocytes are present along the innerside of the branchiostegites and in the epipodites. A consistently high immunofluorescence of Na+, K+-ATPase was observed along the basolateral sides of these ionocytes. The gill lamellae are formed by a single axial epithelium made of H-shaped cells with thin lateral expansions and a basal lamina limiting hemolymph lacunae. A positive but weak fluorescence of the Na+, K+-ATPase was found in lacunae sides of the lamellae cells. These findings show that in P. elegans, the epipodites and the branchiostegites organs appear as the main site of osmoregulation and the gill lamellae are mainly devoted to respiration.
https://jifro.areeo.ac.ir/article_114796_96662e02b956d43dc321c8a7e3035fdb.pdf
PALAEMON ELEGANS
Gill
Osmoregulation
Immunolocalization
NA+
K+-ATPASE
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
73
86
10.22092/ijfs.2018.114770
114770
Catch composition and fishing trend of kilka in Iranian part of the Caspian Sea
M. Sayyad Bourani
mohammadborani@yahoo.com
1
S. Abdolmalaki
2
A.A. Khanipour
khanipour@irari.ir
3
H. Fazli
4
K. Khedmati
5
Population structure of three kilka fishes (Clupeonella spp.), particularly anchovy kilka (C. engrauliformis), in Iranian waters of the Caspian Sea was surveyed in 2003. A total of 3230 biweekly samples were collected from commercially landed kilka at 3 stations in Mazandaran and Guilan provinces. Catch and effort statistics were obtained from the relevant organization. Results showed a great decline in the commercial kilka catch from 95000 tons in 1999 to 15497 tons in 2003. The contribution of anchovy kilka to the total kilka fishery also showed a decline from 71% in 1999 to 52.5% in 2003, while common kilka (C. cultriventris) increased from 13.7% in 1999 to 48.9% in 2003. Fork length range of anchovy kilka showed an increase from 89.2±12mm in 1999 to 100.4±4.9mm in 2003. The age composition of anchovy ranged between 1+ to 7+ years and the dominant group was 5+ years old (age group of 4+ and 5+ comprised 84.6% of population). The K value and L∞ calculated 0.598/year and 110.13 mm respectively. Natural, fishing and total mortality coefficient was estimated 0.69, 0.31 and 1 per year respectively. The results showed a sex ratio of F: M= 68.2: 31.8.
https://jifro.areeo.ac.ir/article_114770_c9a1bee9e50bfe98935b61934d51309b.pdf
CLUPEONELLA ENGRAULIFORMIS
Catch
Growth coefficient
Age
Length
Caspian Sea
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
89
100
10.22092/ijfs.2018.114797
114797
Myxobolus spp. (Myxosporea: Myxobolidea) from fishes of the Zayandeh-Rud River (Esfahan, Iran); new hosts and locality record
M. Masoumian
1
M. Barzegar
2
M. Mehdipoor
3
S. Asadollah
4
B. Jalali
behiar_jalali@yahoo.com
5
In a parasitic survey of the native and introduced fishes in the Zayandehrud River, 5 Myxobolus spp. were found in the gills, fins and skin of examined fish specimens. They include M. varicorhini from fin and M. samgoricus from skin of Capoeta damascina, M. musajevi from gills of Capoeta capoeta gracilis, Myxobolus cristatus from Capoeta aculeata, and M. saidovi from Alburnus sp. Data on the location in the hosts comparing with previous records are provided. The epidemiological importance of Myxobolus spp. in Zayandeh-rud River is also presented. In the present paper the occurrence of five Myxobolus spp. all from endemic fishes from Zayandeh-rud River (A new locality) are recorded from two new hosts; Capoeta damascina, Capoeta aculeata. M. varicorhini and M. saidovi are recorded for the first time from Iranian freshwater fishes.
https://jifro.areeo.ac.ir/article_114797_7dd2b8f7e75ab8927bce049209501e71.pdf
Myxobolus spp
Zayandeh-Rud River
Esfahan province
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
87
102
10.22092/ijfs.2018.114771
114771
Some effects of experimental acidification on phenoloxidase, trypsin and lysozyme activities in freshwater crayfish (Pontastacus leptodactylus)
M. Soltani
msoltani@ut.ac.ir
1
S. Khazraeenia
2
H. Sepehri
3
Levels of phenoloxidase (Po), trypsin and lysozyme activities were determined following 48 hours exposing freshwater crayfish (Pontastacus leptodactylus) weighing 59.8±3.4g to different low pH values of 6.5, 5.5, 4 and 2.5 at 20-23˚C. Significant decrease were found (p<0.01) in levels of Po and trypsin activities in crayfish haemocyte lysate supernatant (HLS) at pHs 5.5 and 4 compared to the control group (pH 8). Also, plasma lysozyme activity showed a significant increase in water with pHs of 6.5, 5.5 and 4 (p<0.01). Furthermore, measurement of calcium and magnesium concentrations in sera samples showed a significant decrease for calcium ion at pHs 5.5 and 4, while magnesium concentration was significantly decreased only at pH 4 compared to control group (p<0.05). Crayfish exposed to pH 2.5 died within 24 hours post-exposure.
https://jifro.areeo.ac.ir/article_114771_d4578549d5439e38c6bd6c3df4c033ec.pdf
CRAYFISH
Pontastacus leptodactylus
Phenoloxidase
Trypsin
lysozyme
serum calcium and magnesium
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
101
110
10.22092/ijfs.2018.114798
114798
A Comparative SEM morphological study on the egg shell in some Anostracans (Crustacea: Branchiopoda) from East Azerbaijan Province of Iran
L. Mehdizadeh Fanid
fanid@tabrizu.ac.ir
1
M. Seidgar
2
G. Azari Takami
3
Abstract:
The surface morphology of resting eggs of Anostracan species from East Azerbaijan Province of Iran and that of Artemia urmiana was compared using Scanning Electron Microscopy (SEM). Anostracan fauna of East Azerbaijan temporary pools were determined as follows:
Chirocephalus skorikowi (Chirocephalidae), Branchinecta orientalis (Branchinectidae), Streptocephalus torvicornis (Streptocephalidae), Branchinella spinosa (Thamnocephalidae) and Artemia urmiana (Artemiidae). However other species may also exist in these pools. Therefore, evaluating the morphology of these cysts by SEM appeared to accentuate that study of cyst ornamentation is a valuable taxonomical factor and more importantly that it can be used to identify the species even when the adults are not present at the time of sampling or in the absence of water.
https://jifro.areeo.ac.ir/article_114798_fd76c86d3e41b07f1739b3b506f33026.pdf
Egg morphology
SEM
Anostraca (Fairy Shrimps)
East Azerbaijan
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
103
120
10.22092/ijfs.2018.114772
114772
Pleuronectiformes species identification along the Iranian coastline of the Persian Gulf
M. Yasemi
yasami_m@yahoo.com
1
A. Keyvan
2
B. Falahatkar
falahatkar@guilan.ac.ir
3
M. Farzingohar
mfgohar@yahoo.com
4
I. Sharifpour
issasharifpour@yahoo.com
5
F. Owfi
6
G.H. Vossoughi
7
Pleuronectiforme fishes of the Persian Gulf coastlines along Khuzestan, Bushehr and Hormozgan provinces were morphometrically and meristically studied from April 2003 to September 2005, in order to identify species. In this experiment, 1551 fish samples were caught by trawl or collected from fish markets. The sampling was carried out in 27 regions seasonally. Thirty six traits and parameters including 18 morphometric, 11 meristic, and 7 phenotype characters were determined. Data obtained from morphometric parameters were analyzed and dendrograms were designed using cluster method. Comparision of the biometric data with the checklist identification index of species show that there are 6 main and dominant families including: Bothidae, Psettodidae, Citharidae, Soleidae, Cynoglossidae and Paralichthyidae in the area. In addition, the identification of above- mentioned families indicated that 25 species in Khuzestan area, 19 species in Bushehr area and 16 species in Hormozgan area inhabit the coastal waters of the Persian Gulf. Meanwhile, 13 species from 5 families in Persian Gulf that have not been reported so far are identified and reported in this research. According to these results and comparing with other studies, 30 species from 6 families were identified in coastal waters in the Persian Gulf on Khuzestan, Bushehr and Hormozgan areas which is the most complete study in Persian Gulf.
https://jifro.areeo.ac.ir/article_114772_063aa334172513c07846bcc282ba2a0c.pdf
Species identification
PLEURONECTIFORMES
Persian Gulf
Iran
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
111
128
10.22092/ijfs.2018.114799
114799
The effects of extender type, freezing and thawing rates on fertility of the cryopreserved semen of the Caspian brown trout (Salmo trutta caspius )
M. Saravi Moghanloo
k_sarvi@yahoo.ca
1
H. Niksirat
2
B. Mojazi Amiri
3
S.M. Mirtorabi
4
Cryopreservation of semen from the Caspian brown trout (Salmo trutta caspius) and effects of extender type, freezing and thawing rates on fertilization ability were studied. After assessment of semen quality, one part of semen was diluted with three parts of different extender and decanted into 0.5ml straws. Freezing was carried out at two freezing levels, 1.5cm and 2cm above surface of liquid nitrogen. The semen was thawed at 5°C for 90s, 15°C for 45s or 25°C for 30s in water baths and used for fertilization. Using the extender: 0.3 M glucose+10% methanol+10% egg yolk, and 0.6 M sucrose 10% DMSO + 10% egg yolk, yielded the highest post-thaw fertilization rates, with 67.05%±8.76 and 59.78%±5.08 eyeing rates, respectively. No significant differences were found in the fertilization rates with two freezing levels (P>0.05), however eyeing and hatching rates were higher for 2cm above the surface of the liquid nitrogen than for 1.5cm. Thawing of cryopreserved semen was best using the 25°C water bath for 30s and significant differences were seen in the eyeing rates between 25°C and 5°C or 15°C (P<0.05). Significant interactions (P<0.05) were found between effects of extender type and thawing rates and extender type and freezing rates.
https://jifro.areeo.ac.ir/article_114799_c3f773817ff73ab54dfb0b6b4e087544.pdf
Cryopreservation
Extender
Freezing
thawing
fertility
Salmo trutta caspius
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
121
136
10.22092/ijfs.2018.114773
114773
Genetic parameters of growth in rainbow trout, Oncorhynchus mykiss, at early rearing stage
M. Yousefian
yousefianeco@yahoo.com
1
The heritability response for growth of rainbow trout during early developmental stages was detected on the basis of full-sib and half-sib cross between the selected lines. The experiment was done in Shahid Bahonar Salmon Propagation Center, Kelardasht, Iran. Breeders were taken from the stocks maintained in this station. A bifactorial cross was done between two line using four randomly sire and four randomly chosen dams form each line
Analysis of variance revealed a significant difference at 300 days of age between half and full-sib (p<0.026). The effective difference in weight between half/full-sibs of juveniles was not statistically significant on 150 days (p>0.817) and 225 days (p>0.081). No significant difference between mean body weight of male and female half-sib group was found (p>0.05); neither were there significant differences between sireline (p<0.324) and dam line (p<0.230) at age of 300 days.
The heritability ranged from 0.093 to 0.223 in sire and 0.11 to 0.329 in dam groups. The average heritability in sire regardless of age was 0.16 and in dams 0.21. The heritability in total regardless of age and sex was estimated about 0.185.
Genetic parameters (h2) were different between dams (0.15-0.27) and sires (0.13-0.19) for all ages of samplings and for age of 150 day old, was significant (p<0.035).
https://jifro.areeo.ac.ir/article_114773_a28ad2b217aa38497602b77f0e151dd8.pdf
Rainbow trout
heritability
Full-sib
Half-sib
eng
Agricultural Research,Education and Extension Organization
Iranian Journal of Fisheries Sciences
1562-2916
2322-5696
2008-01-01
7
1
129
140
10.22092/ijfs.2018.114800
114800
Vaccination of rainbow trout against Streptococcus iniae infection: comparison of different routes of administration and different vaccines
M. Soltani
msoltani@ut.ac.ir
1
M. Alishahi
2
S. Mirzargar
3
Gh. Nikbakht
4
Antibody production and clinical efficacy (relative percent survival RPS) were measured in 40±5g rainbow trout after immunization with two types of Streptococcus iniae vaccines consisting of formalin killed cells (FKC) and FKC enriched with the bacterial extracellular products (ECP) administered by intraperitoneal (i.p), immersion and oral routes at 16±1°C for 18 weeks. No significant difference was found in antibody levels among the fish i.p immunized with FKC enriched with ECP plus Freunds' adjuvant (FA), FKC plus FA and FKC vaccines (P>0.05), whilst the antibody production was significantly higher in these three groups than fish immunized by immersion and oral routes of FKC and FKC enriched ECP (P<0.05). Also, fish immunized by immersion route with FKC showed significantly higher antibody titer than fish orally vaccinated with FKC with or without ECP until 12 weeks post-immunization (P<0.05). No significant difference was found in antibody titer between orally vaccinated fish and control groups (P>0.05). The RPSs ranging 82.6-100, 73.9-95 and 73.9-91.7% were obtained in the fish intraperitoneally immunized with FKC enriched ECP plus FA, FKC plus FA and FKC vaccines, respectively, compared to 0% survival for the control fish. Also, RPS in fish vaccinated by the immersion route was in the range 45.8-30.4% after 18 weeks post-vaccination. Efficacy of oral vaccination of fish with FKC plus ECP was in range of 8.7-29% and that of fish orally vaccinated with FKC resulted in 8.7-20.8% protection.
https://jifro.areeo.ac.ir/article_114800_9c6dcafd3a8975df06e3d763c4fdcfb5.pdf
vaccine
Streptococcus iniae
streptococcosis
Rainbow trout