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  • Fisheries  (6)
  • Biology  (5)
  • 1
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    Phylogenetic relationships of the commercial marine shrimp family Penaeidae from Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/22869 | 18721 | 2018-05-30 22:56:51 | 22869 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-11
    Description: Phylogenetic relationships among all described species (total of 5 taxa) of the shrimp genus Penaeus, were examined with nucleotide sequence data from portions of mitochondrial gene and cytochrome oxidase subunit I (COI). There are twelve commercial shrimp in the Iranian coastal waters. The reconstruction of the evolution phylogeny of these species is crucial in revealing stock identity that can be used for the management of fish industries in Iran. Mitochondrial DNA sequences were used to reconstruct the phylogeny of the Penaeus species of marine shrimp. For this purpose, DNA was extracted using phenol-chloroform well as CTAB method. The evolutionary relationships among 5 species of the shrimp genus Penaeus were examined using 610 bp of mitochondrial (mt) DNA from the cytochrome oxidase subunit I gene. Finally the cladograms were compared and the resulting phylogenetic trees confirmed that the Iranian species originated from the Indo-West Pacific species. The Iranian species, which were not grouped with the other Penaeid taxa, seem to always form a sister-clade to the Indo-West Pacific species with strong bootstrap support of 100%. Although the Iranian species + Western Hemisphere clade is paraphyletic in our gene tree, the bootstrap support is high. However, we still lack any comprehensive and clear understanding of phylogenetic relationships in this group.
    Keywords: Biology ; Fisheries ; Management ; Mitochondrial DNA ; Penaeidae ; Persian Gulf ; Phylogeny ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 333-346
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  • 2
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    Molecular evaluation of the population of Silver Pomfret (Pampus argenteus) in the Persian Gulf and Oman Sea (Iranian &Kuwaiti waters) (2021)
    In:  http://aquaticcommons.org/id/eprint/23749 | 18721 | 2018-07-25 05:46:40 | 23749 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: A total of 162 specimens of Silver Pomfret (Pampus argenteus) including 38 samples from Kuwait and 124 samples from Iran (24 from Khouzestan, 24 from Chabahar and 38 from Bushehr) were examined for their DNA structure. DNA from all specimens was extracted using the Phenol-chloroform and amplified using PCR method with a pair of primers with ND sub(2) gene sequence. The PCR products were about 1300 (bp) for all samples. For RFLP analysis 16 restriction enzymes Bcl I, Pst I, Acc II, BseN I, Tru I, Dra I, Alw26 I, Hin6 I, Tas I, Alu I, EcoR I ,Hae III, Hinc II, Hind III, Hinf I and Hpa II were used. DNA bands were visualized by Gel electrophoresis (polyacrylamid) and staining with silver nitrate. Out of 16 enzymes, four showed polymorphism that includedg Hinf I, Alu I, Acc II, and Hpa II. Of the total 162 samples, 13 showed polymorphic patterns. Six haplotypes were rare occurring only once, but others which were only four different kinds occurred more than once. The REAP test gave no significant result for the examined regions (P〉0.05). Therefore, our results revealed that the Pampus argenteus stocks in the Persian Gulf and Oman Sea of Iranian and Kuwaiti waters constitute a unique population.
    Keywords: Fisheries ; PCR-RFLP ; Pampus argenteus ; Persian Gulf ; Bushehr ISW ; Oman ISW ; Kuwait ISW ; Oman Sea ; Iran ; ISW
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 45-56
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  • 3
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    Application of microsatellite markers to study the genetic structure of stellate sturgeon populations (Acipenser stellatus Pallas, 1771) in the south Caspian Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/22336 | 18721 | 2018-03-22 17:51:18 | 22336 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: Population genetic structure of stellate sturgeon (Acipenser stellatus) in 197 adult specimens from four fishery regions along the Iranian coastline of the southern Caspian Sea was investigated using microsatellite markers. Out of 15 microsatellite primers, 11 loci were produced, in which 10 of them were polymorphic and 1 was monomorph. Totally, 184 alleles were identified and on average 13.1 alleles per locus were found (ranged 8 to 18 alleles). All sampled regions contained unique alleles. Average observed and expected heterozygosity was 0.667 and 0.854, respectively and significant genetic differences between 4 regions were observed (p≤0.01). Deviations from Hardy-Weinberg equilibrium were found in most cases. Population differentiation test was modest and significant (p≤0.01). Based on FST estimate (p≤0.01), more than one population of stellate sturgeon is identified in the south Caspian Sea. Therefore, fishery management for restocking and conservation of gene pool is highly recommended.
    Keywords: Biology ; Fisheries ; Stellate sturgeon ; Population genetics ; Microsatellite ; South Caspian Sea ; Iran ; Acipenser stellatus
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 73-84
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  • 4
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    Validation of back-calculation methods using otoliths to determine the length of anchovy kilka (Clupeonella engrauliformis) (2021)
    In:  http://aquaticcommons.org/id/eprint/22340 | 18721 | 2018-03-22 19:26:24 | 22340 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: Age structure of the Caspian Sea anchovy kilka, Clupeonella engrauliformis, was estimated for the first time by back-calculation methods. Otolith growth and the rate of increment in anchovy kilka were examined to determine whether otoliths could be used to back calculate body sizes at various life stages. Sampling was carried out on commercial fishing vessels board along the Iranian coast in 2007. The age structure of the samples ranged from 2 to 7 years old which was dominated by the third year class (38.6%). The largest fish measured was 137.2mm fork length. The relationship between fork length (FL) and otolith radius (OR) was described by the following equation: FL=13.77+ 82.78*OR (r^2=0.92). Three proportional back-calculation methods, Fraser-Lee, Whitney & Carlander and Dahl-Lea models, were compared by using data sets of anchovy kilka otoliths, and we validated back calculation by comparing them with observed lengths. Back calculated lengths generally corresponded well with observed lengths in anchovy kilka age classes. Variance of the back calculated length data obtained from three models indicated no significant difference (P〉0.05).
    Keywords: Biology ; Fisheries ; Clupeonella engrauliformis ; Otolith ; Back-calculation ; Age structure ; Caspian Sea ; Iran ; anchovy kilka
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 115-126
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  • 5
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    Reproductive biology of Indian squid, Uroteuthis duvauceli (Orbigny, 1835), in the northern Gulf of Oman (2021)
    In:  http://aquaticcommons.org/id/eprint/22337 | 18721 | 2018-03-22 17:59:53 | 22337 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: Some aspects of the reproductive biology of the Indian squid, Uroteuthis duvauceli, were studied from June 2006 to May 2007. A total of 1200 specimens were collected from approximately 30-80m depths by trawling in 50 stations, of which 360 samples were studied for sex determination and fecundity. The minimum and maximum total and mantle length, and body weight were recorded in December and June, respectively. The highest range of total length (410-420mm), mantle length (150-160mm) and body weight (90-100g) were encountered in September. The specimens were composed of 34% male and 66% female (M:F=1:2). This species was found to be more abundant in summer. The minimum and maximum ovary weights were 2.1g and 7.9g with an average of 4.9g, respectively. These values for nidamental gland weight were 0.70 and 2.61g with an average of 1.6g. The minimum and maximum absolute fecundity were 25510 (in August) and 375600 (in April), respectively. These values for relative fecundity were 5207 (in April) and 867 (in August), respectively. The highest gonadosomatic index (GSI) was in April (14.38) and the lowest was in July (8.63). This squid is, therefore, assumed to be a spring spawner. Minimum and maximum egg diameter were 0.72mm (in August) and 2.5mm (in April), respectively.
    Keywords: Biology ; Fisheries ; Indian squid ; Uroteuthis duvauceli ; Fecundity ; GSI ; Sex ratio ; Gulf of Oman ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 85-96
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  • 6
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    A survey and comparison of breeder stocks of shrimp species in the fishing grounds east of Hormozgan province, Iran (2021)
    In:  http://aquaticcommons.org/id/eprint/23751 | 18721 | 2018-07-25 05:55:47 | 23751 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: The main fishing ground for shrimps in Hormozgan province along the Persian Gulf are located in the north of Qeshm Island to Sink area with a yearly catch of 1500m2000 tons from east coast of Hormozgan province located in Iranian waters of Oman Sea. Collection of breeder shrimps in important fishing grounds of Sinik to Jask area was started in 1995 for shrimp culture objectives and the present research was carried out in 2001 to 2002 and 2007, aiming at identifying shrimp species, determining frequency distribution of the species in the catch and evaluating shrimp maturity stages in the catch. Samples were collected using swept area method on a biweekly or monthly basis. Result showed that Fenneropenaeus indicus was dominant in the shrimp catch comprising 44.8-59.5% while this rate was 13.534% for Fenneropenaeus merguiensis, 15.7-20.5% for Penacus semisulcatus, 5.5-16% for Metapenaeus affinis, 0d•14.5% for M stebbingi 04.5% for Parapenaeopsis stylifera in the Jask and Sheik areas in 2001-2002 and 2007. CLm500/0 was 34.7mm for F. indicus females, 31mm for F. merguiensis, 34.3mm for P. misulcatus and 27.16mm for M. affinnis in Jask and Sink areas. Tukey test showed that the average carapace length in F. indicus, F. merguiensis and P. semisulcatus caught in Jask were significantly larger than those from Sink area (P〈0.05). Sex ratio was not 1:1 in these shrimp species and there is significant differences between them (P〈0.05). Maximum abundance of F. indicus, F. semisulcatus, M affninis and F. merguiensis spawners, were found during March to June in Jask and June to July in Sinik areas.
    Keywords: Aquaculture ; Biology ; Shrimp breeder stocks ; Sex ratio ; Hormozgan province ; Hormozgan province ISW ; Oman ISW ; Qeshm I. ISW ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 67-80
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  • 7
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    By-catch composition of small-scale shrimp trawlers in the Persian Gulf (Hormuzgan Province), Iran (2021)
    In:  http://aquaticcommons.org/id/eprint/24717 | 18721 | 2018-08-04 16:19:11 | 24717 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Fishing vessels equipped with bottom trawls cause high amount of by-catch and discards. We investigated the catch composition and by-catch percentage in October - November 2002 during shrimp fishing season in Hormuzgan Province waters. The studied area was located in DarmSoorkh area, east of Hormuz Island and Toola area. Sampling was done using wooden fishing dhows. During shrimp season, 36 hauls with a total catch of 6050kg were treated. The catch composed of 88 species belonging to 50 families of which 67 species were bony fish from 38 families, 9 species were cartilaginous fish from 6 families, and 3 species were mollusks from three families and also 9 species of crustacean were found belonging to 3 families. The percentages of different groups of by-catch and target catch (shrimp) were 49.4% small discards, 18.7% large discards, 4.7% commercial species and 27.2% shrimp. The ratio of total by-catch to shrimp was estimated to be about 2.7 times that of the shrimp.
    Keywords: Fisheries ; Discard catch ; Shrimp ; Hormuzgan province ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 129-138
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