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  • 1
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    Impact of two parasitic trematodes, Meiogymnophallus minutus and Himasthla spp., on the growth of the cockle, Cerastoderma edule (2018)
    Details
    Publication Date: 2021-05-19
    Description: The impact of two principal parasitic digenetic trematodes, Meiogymnophallus minutus and Himasthla spp., on the growth (weight and length) of the cockle, Cerastoderma edule, in Arcachon Bay (France) was studied. The experiment was conducted in the land-based mesocosms. The velocity of infestation with both trematodes was far more rapid during summer in the cockles already parasitized with these trematodes (0.35 to 0.45 metacercariae day-1) than those of healthy ones (approximately 0.01 metacercariae day-1). The parasitism had also an effect on the growth rates of cockles. During 190 days of the experiment, the daily growth speed varied from 0.001mm.da/ to 0.021mm.day-1. On average, the growth was slightly more important in healthy cockles after the start of experiments (0.014mm.day-1) than those initially infested cockles (0.011 mm.day-1). The experiment also showed that infestation of hosts with trematodes could perhaps disturb their immunity system, as the intensification with trematode parasites had been favored by already infested cockles.
    Description: Published
    Keywords: Meiogymnophallus minutus ; Himasthla spp. ; Cerastoderma edule ; Mesocosm ; Cerastoderma edule ; Parasitism ; Digenea ; Growth ; Host parasite interactions
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.33-58
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  • 2
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    Population dynamics of the Spanish mackerel (Scomberomorus commerson) in coastal waters of Oman Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Length composition data of narrow-barred Spanish mackerel, Scomberomorus commerson (Lacepede 1800), landed between April 2002 to March 2004, were monthly used to estimate the growth, mortality and exploitation parameters of the stock. Maximum fork length and weight were 170 cm and 38 kg, respectively. Nonlinear least square fitting provided a complete set of von Bertalanffy growth estimates: L¥=178 cm (FL); K=0.28 and to= -0.36 years. The estimated value of total mortality based on length converted catch curve using these growth parameters is Z=0.95 year-I. Natural mortality based on growth parameters and mean environmental temperature (T=26.5°C) is M=0.36 year-1. Furthermore, the annual instantaneous fishing mortality rate of 0.59 year-I was by far in excess of the precautionary target (Fopt=0.18 year-1) and limit (Flimit=0.24 year-1) biological reference points, indicating that the resource is heavily over-exploited and the management of this species should be implanted rapidly if they are to remain sustainable.
    Description: Published
    Keywords: Spanish mackerel ; Scomberomorus commerson ; Population dynamics ; Population ; Length ; Growth ; Parameters
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.257-270
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  • 3
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    Reproduction of Klunzinger Mullet, Liza klunzingeri, in coastal waters of Khuzestan Province (Persian Gulf) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Some reproduction characteristics of keeled mullet, Liza klunzingeri, were studied during Apr. 2003 to Feb. 2004 in Khuzestan waters of the Persian Gulf. A total of 836 samples were monthly collected from two fish landings of Bahrekan and Hendijan; 727 specimens were studied from point of sex determination, and 60 specimens were studied from the fecundity point of view. This species was found to have more abundance in autumn (esp. Oct-Nov). The samples composed of 89 (12.2%) male, 467(64.2%) female and 171 (23.6%) immature; the sex ratio was M:F = 1:5. The advanced stages of maturity (4th& 5th) were found in October onward. The highest Gonadosomatic Index was in December and the lowest was in June. The maximum absolute and relative fecundities were 183040 and 2232, respectively; the minimum absolute and relative fecundities were 44700 and 582, respectively. The minimum and maximum egg diameter was 0.04mm (stage 2nd) and 0.75mm (stage 6th).
    Description: Published
    Keywords: Keeled mullet ; Liza klunzingeri ; Fecundity ; GSI ; Sex ratio
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.129-142
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  • 4
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    Effects of iron concentration on the growth of Green Alga, Ankistrodesmus Falcatus (2018)
    Details
    Publication Date: 2021-05-19
    Description: Possible effects of various iron concentrations on the growth of green algae, Ankistrodesmus falcatus, were studied at Inland Waters Aquaculture Research Center, in Bandar Anzali, Guilan Province. The algae was grown under laboratory conditions with a water temperature of 25±20C and light intensity of 3500±350 lux for 96 hours at 6 concentrations of Fe in triplicates, using standard Zander culture medium (Z-8±N) as control. The amount of Fe absorption was measured using spectrophotometry at 750nm, and the number of algal cells at the beginning and final stages were counted, using Toma slide. Maximum growth of Ankistrodesmus falcatus was observed at Fe concentrations of 0.0005 g/l, when the concentration of the element in the control group (Z-8:tN) was 0.00019g/l. It was shown that Fe concentrations higher or lower than 0.0005g/l had negative effects on the algal growth.
    Description: Published
    Keywords: Growth ; Green Alga ; Iron ; Ankistrodesmus falcatus ; Zander ; Aquaculture ; Temperature
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.161-164
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  • 5
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    Experimental assessment of the histopathological effects of water-soluble fraction of crude oil on gill tissue of juvenile Rutilus frisii kutum (2021)
    In:  http://aquaticcommons.org/id/eprint/21823 | 18721 | 2018-01-10 17:02:00 | 21823 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: 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 de- chlorinated 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.
    Keywords: Fisheries ; Pollution ; Histopathology ; Water-soluble fraction ; Gill ; Rutilus frisii kutum ; Caspian Sea ; iran ; tissue ; juvenile
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 89-99
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  • 6
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    Population dynamics of the Spanish mackerel (Scomberomorus commerson) in coastal waters of Oman Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/22328 | 18721 | 2018-03-21 05:13:35 | 22328 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: Length composition data of narrow-barred Spanish mackerel, Scomberomorus commerson (Lacepede 1800), landed between April 2002 to March 2004, were monthly used to estimate the growth, mortality and exploitation parameters of the stock. Maximum fork length and weight were 170 cm and 38 kg, respectively. Nonlinear least square fitting provided a complete set of von Bertalanffy growth estimates: L¥=178 cm (FL); K=0.28 and to= -0.36 years. The estimated value of total mortality based on length converted catch curve using these growth parameters is Z=0.95 year-I. Natural mortality based on growth parameters and mean environmental temperature (T=26.5°C) is M=0.36 year-1. Furthermore, the annual instantaneous fishing mortality rate of 0.59 year-1 was by far in excess of the precautionary target (Fopt=0.18 year-1) and limit (Flimit=0.24 year-1) biological reference points, indicating that the resource is heavily over-exploited and the management of this species should be implanted rapidly if they are to remain sustainable.
    Keywords: Biology ; Fisheries ; Scomberomorus commerson ; Population dynamics ; Oman Sea ; Iran ; Spanish mackerel
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 257-270
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  • 7
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    Growth, molting and survival response of juvenile narrow clawed crayfish, Astacus leptodactylus, fed two sources of dietary oils (2021)
    In:  http://aquaticcommons.org/id/eprint/22442 | 18721 | 2018-04-09 19:39:08 | 22442 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-05
    Description: The influence of five pure diets of isonitrogenous and isoenergic with different ratios of Clupeidae fish oil (F) and soybean oil (S) on growth, molting and survival of narrow-clawed crayfish, Astacus leptodactylus, was evaluated during an 8-weeks trial. As soybean oil replaced with fish oil in each treatment, gently. Test diets were inclusive F0/S100, F30/S70, F50/S50, F70/S30 and F100/S0 fish oil per soybean oil percent. The test organism housed in fiber-glass tanks of 100 l capacity with flowing water and aeration in tanks are supplied. The test followed a randomized complete design. Each treatment organized with 6 replicates and totally 30 rearing tanks involved. At the end of the trial, the crayfish offered diet containing Clupeidae fish oil (rich in n-3 fatty acids) showed the lowest food conversion ratio and highest weight gain performance as well as molting and survival rates. In contrast, the diet containing soybean oil (rich in fatty acids n-6) contributed least to growth and other indices. Statistical test showed the differences between this two formulated diets were significant (P〈0.05). Results indicated that n-3 series of fatty acids are required in the diet of A. leptodactylus.
    Keywords: Aquaculture ; Biology ; Fisheries ; Astacus leptodactylus ; Diet ; Fish oil ; Soybean oil ; n-3 ; n-6 ; Growth ; Survival ; molting ; Clupeidae ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 505-518
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  • 8
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    Impact of two parasitic trematodes, Meiogymnophallus minutus and Himasthla spp., on the growth of the cockle, Cerastoderma edule (2021)
    In:  http://aquaticcommons.org/id/eprint/22295 | 18721 | 2018-03-13 20:35:53 | 22295 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: The impact of two principal parasitic digenetic trematodes, Meiogymnophallus minutus and Himasthla spp., on the growth (weight and length) of the cockle, Cerastoderma edule, in Arcachon Bay (France) was studied. The experiment was conducted in the land-based mesocosms. The velocity of infestation with both trematodes was far more rapid during summer in the cockles already parasitized with these trematodes (0.35 to 0.45 metacercariae day-1) than those of healthy ones (approximately 0.01 metacercariae day-1). The parasitism had also an effect on the growth rates of cockles. During 190 days of the experiment, the daily growth speed varied from 0.001mm.da/ to 0.021mm.day-1. On average, the growth was slightly more important in healthy cockles after the start of experiments (0.014mm.day-1) than those initially infested cockles (0.011 mm.day-1). The experiment also showed that infestation of hosts with trematodes could perhaps disturb their immunity system, as the intensification with trematode parasites had been favored by already infested cockles.
    Keywords: Biology ; Fisheries ; Mesocosm ; Cerastoderma edule ; Parasitism ; Digenea ; Growth ; Host parasite interactions ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 33-58
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  • 9
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    Reproduction of Klunzinger mullet, Liza klunzingeri, in coastal waters of Khuzestan Province (Persian Gulf) (2021)
    In:  http://aquaticcommons.org/id/eprint/22301 | 18721 | 2018-03-13 21:53:45 | 22301 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: Some reproduction characteristics of keeled mullet, Liza klunzingeri, were studied during Apr. 2003 to Feb. 2004 in Khuzestan waters of the Persian Gulf. A total of 836 samples were monthly collected from two fish landings of Bahrekan and Hendijan; 727 specimens were studied from point of sex determination, and 60 specimens were studied from the fecundity point of view. This species was found to have more abundance in autumn (esp. Oct-Nov). The samples composed of 89 (12.2%) male, 467 (64.2%) female and 171 (23.6%) immature; the sex ratio was M:F = 1:5. The advanced stages of maturity (4th & 5th) were found in October onward. The highest Gonadosomatic Index was in December and the lowest was in June. The maximum absolute and relative fecundities were 183040 and 2232, respectively; the minimum absolute and relative fecundities were 44700 and 582, respectively. The minimum and maximum egg diameter was 0.04mm (stage 2nd) and 0.75mm (stage 6th).
    Keywords: Biology ; Fisheries ; Keeled mullet ; Liza klunzingeri ; Fecundity ; GSI ; Sex ratio ; Persian Gulf ; Iran ; Khuzestan Province
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 129-142
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  • 10
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    Effects of iron concentration on the growth of green alga, Ankistrodesmus falcatus (2021)
    In:  http://aquaticcommons.org/id/eprint/24736 | 18721 | 2018-08-04 16:59:05 | 24736 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Possible effects of various iron concentrations on the growth of green algae, Ankistrodesmus falcatus, were studied at Inland Waters Aquaculture Research Center, in Bandar Anzali, Guilan Province. The algae was grown under laboratory conditions with a water temperature of 25±2°C and light intensity of 3500±350lux for 96 hours at 6 concentra­ tions of Fe in triplicates, using standard Zander culture medium (Z-8±N) as control. The amount of Fe absorption was measured using spectrophotometry at 750nm, and the number of algal cells at the beginning and final stages were counted, using Toma slide. Maximum growth of Ankistrodesmus falcatus was observed at Fe concentrations of 0.0005 g/l, when the concentration of the element in the control group (Z-8:tN) was O.00019g/l.It was shown that Fe concentrations higher or lower than O.0005g/l had negative effects on the algal growth.
    Keywords: Biology ; Iron ; Ankistrodesmus falcatus ; Zander ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 161-164
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