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  • Iranian Fisheries Science Research Institute  (34)
  • Hindawi  (4)
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  • 1
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    Non-Archimedean Hyers-Ulam Stability of an Additive-Quadratic Mapping (2012)
    Hindawi
    Details
    Publication Date: 2012-03-01
    Description: Using fixed point method and direct method, we prove the Hyers-Ulam stability of the following additive-quadratic functional equation r2f((x+y+z)/r)+r2f((x-y+z)/r)+r2f((x+y-z)/r)+r2f((-x+y+z)/r)=4f(x)+4f(y)+4f(z), where r is a positive real number, in non-Archimedean normed spaces.
    Print ISSN: 1026-0226
    Electronic ISSN: 1607-887X
    Topics: Mathematics
    Published by Hindawi
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  • 2
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    Stabilities of Cubic Mappings in Various Normed Spaces: Direct and Fixed Point Methods (2012)
    Hindawi
    Details
    Publication Date: 2012-01-19
    Description: In 1940 and 1964, Ulam proposed the general problem: “When is it true that by changing a little the hypotheses of a theorem one can still assert that the thesis of the theorem remains true or approximately true?”. In 1941, Hyers solved this stability problem for linear mappings. According to Gruber (1978) this kind of stability problems are of the particular interest in probability theory and in the case of functional equations of different types. In 1981, Skof was the first author to solve the Ulam problem for quadratic mappings. In 1982–2011, J. M. Rassias solved the above Ulam problem for linear and nonlinear mappings and established analogous stability problems even on restricted domains. The purpose of this paper is the generalized Hyers-Ulam stability for the following cubic functional equation: f(mx+y)+f(mx-y)=mf(x+y)+mf(x-y)+2(m3-m)f(x),m≥2 in various normed spaces.
    Print ISSN: 1110-757X
    Electronic ISSN: 1687-0042
    Topics: Mathematics
    Published by Hindawi
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  • 3
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    Non-Archimedean Hyers-Ulam Stability of an Additive-Quadratic Mapping (2012)
    Hindawi
    Details
    Publication Date: 2012-01-01
    Print ISSN: 1026-0226
    Electronic ISSN: 1607-887X
    Topics: Mathematics
    Published by Hindawi
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  • 4
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    Stabilities of Cubic Mappings in Various Normed Spaces: Direct and Fixed Point Methods (2012)
    Hindawi
    Details
    Publication Date: 2012-01-01
    Print ISSN: 1110-757X
    Electronic ISSN: 1687-0042
    Topics: Mathematics
    Published by Hindawi
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  • 5
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    Diversity, assessment and distribution of endemic and non-endemic vertebrate species of genetic resources in the Persian Gulf and Oman Sea (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Two water bodies of the Persian Gulf and Oman Sea located in the South of Iran and different vertebrate aquatics inhabiting there consist of fishes (Osteichthyes and Chondricthyes), marine mammals, sea snakes and reptiles. A total of 860 fish species belongs to 31 orders and 142 families have been identified and reported. Amongst them, some important species have been studied from point of molecular genetics and population genetics such as croaker, silver pomfret, cobia, sardines, lanternfishes…. . On the other hand, from marine mammals a total of 10 species of dolphins, 14 species of whales and one species of dugong were identified.Also, 9 species of sea snakes have been reported from the Persian Gulf and Oman Sea belongs to 6 genus and 2 subfamilies of Hydrophidae family. It should be mentioned that no genetic studies have been done on marine mammals and sea snakes till now. In addition, a total of 5 species of sea turtles have been reported from the study area and there are few background on genetic studies for main species in the Persian Gulf.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Diversity ; Distribution ; Species ; Genetic
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 46pp.
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  • 6
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by Swept area method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, eleven research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (borderline with Kuwait) to 61º 25´ E in the east (borderline with Pakistan) from 2009 to 2011. The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method. In 2009, due to the bloom of jellyfish, there was some problem for sampling and therefore made some bias in our estimation. Therefore, the biomass of jellyfish was excluded from all calculations. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2009, 2010 and 2011 were 1.5, 3.7 and 1.7 times more than the Oman Sea and totally 60-80% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2009 & 2011; and C & D regions (Genaveh to Dayyer) in 2010 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2009 and 2011 the regions of L (Jask to Meidani) and K (Sirik to Jask) in the Oman ; and 2010 the G region (Mogham to Farour) in the Persian Gulf had the highest value of this parameter. It can be concluded that the north-west of the Oman Sea has the best condition of biomass and CPUA of commercial and non-commercial demersal fishes; and on the contrary the low values were estimated for A region (north-west of the Persian Gulf) and P region (Konarak to Ramin) in the Oman Sea. With review the mean CPUA in defferent depth layers for years 2009, 2010 and 2011, it was concluded that with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 50-100 m. The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 52.2, 57.1 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Catfishes, Grunts, Japanese threadfin bream, Carangids, Hair tail, Barracuda and Lizardfish for both Persian Gulf and Oman Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial fishes ; Non-commercial fishes ; Biomass ; Catch per unit of area ; CPUA ; Sampling ; Density ; Species ; Catfishes ; Grunts ; Japanese threadfin bream ; Carangids ; Hair tail ; Barracuda ; Lizardfish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 283pp.
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  • 7
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by Swept area method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, ten research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (north-west Persian Gulf) to 61º 25´ E in the east (borderline with Pakistan) from 2012 to 2014 The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method During this three years period, the strat A and B weren’t covered. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2012, 2013 and 2014 were 1.0, 1.4 and 1.6 times more than the Oman Sea and totally 50-60% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2012 & 2014; and C region (Genaveh to Bordkhoon) in 2013 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2012 to 2014 the region K (Sirik to Jask) in the Oman Sea and Stratum Q (Bersi to Gwatr) had the highest value of CPUA. On the contrary, the startum M (Biahi to Galak estuary) showed the lowest value of biomass for both commercial and non-commercial fishes. With review the mean CPUA in defferent depth layers for years 2012, 2013 and 2014, it was concluded that in the Oman Sea with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 30-50 m The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 63.4, 65.0 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Ribbon fishes, Carangids, Grunts, Japanese threadfin bream, Lizardfish and Barracuda for both Persian Gulf and Oman Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial fishes ; Non-commercial fishes ; Biomass ; CPUA ; Ecosystems ; Lizardfish ; Barracuda
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 264pp.
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  • 8
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by Swept area method (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, ten research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (north-west Persian Gulf) to 61º 25´ E in the east (borderline with Pakistan) from 2012 to 2014 The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method During this three years period, the strat A and B weren’t covered. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2012, 2013 and 2014 were 1.0, 1.4 and 1.6 times more than the Oman Sea and totally 50-60% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2012 & 2014; and C region (Genaveh to Bordkhoon) in 2013 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2012 to 2014 the region K (Sirik to Jask) in the Oman Sea and Stratum Q (Bersi to Gwatr) had the highest value of CPUA. On the contrary, the startum M (Biahi to Galak estuary) showed the lowest value of biomass for both commercial and non-commercial fishes. With review the mean CPUA in defferent depth layers for years 2012, 2013 and 2014, it was concluded that in the Oman Sea with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 30-50 m The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 63.4, 65.0 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Ribbon fishes, Carangids, Grunts, Japanese threadfin bream, Lizardfish and Barracuda for both Persian Gulf and Oman Sea.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Commercial fishes ; Non-commercial fishes ; Biomass ; CPUA ; Species ; Estimation ; Method ; Area ; Demersal resources
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 264pp.
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  • 9
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    Ecological Interaction Between Commercial Fishes in the Persian Gulf (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: An ecosystem-based management fishery is a new way of looking at management of living resources. Trophic levels of basic food items, feeding habits, growth and mortality rate of 20 exploited fish species (including commercial and bycatch) are investigated in the Persian Gulf (from the provinces of Khuzestan, Bushehr and Hormozgan,) from 2010 to 2012. The model considers trophic interactions among 12 functional group of the ecosystem involving Phytoplankton, Zeoplankton, Cephalopods, Shrimp, Infauna Benthos, Epifaunal Macrobenthos, Demersal Zoobenthos Feeders, Small Pelagic Planktivorous Fish, Benthoplagic Feeder, Piscivorous, Large Benthic Carnivores And Small Benthic Carnivores. In general 7452 of stomach contents samples were analyzed based on the weight and numerical method and were detected about 40 preys. The results demonstrated gaps in our knowledge on the food web structure. The mean trophic levels were varied from L. klunzingeri (2) to S. tumbil (4.64), while the total catch of some species were fluctuating widely. Result of our study showed that Total mortality varied between 0.45 per year (A. suppositus) to 9.5 per year (P. indicus) and food consumption rate also fluctuated by 1.9 (L. johni ) to 89 (L. lineolatus). The results indicated that some fish species including sardine, Anchovies, small carangids, S. stridens with high frequency in ecosystem, have been occupied in the food web as a wasp-waist. The model showed that most hunters groups live in middle levels in the food web such as N. japonicas, A. latus, P. kaakan, L. nebolusus, P. indicus and T. lepturus . Analysis the catch rate during 2001-2011 reveled that there is a clear trend of declining most of fish species catches in this research except for T. lepturus, P. kaakan and sparids which lead to upset the fundamental ecological balance of the Persian Gulf in future.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ecological ; Commercial ; Trophic level ; Functional group ; Prey ; Trophic interaction ; Fish
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 131pp.
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  • 10
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    A Study on Stocks of Five Tuna Species in Hormuzgan Province Waters 1397-99 (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Studying and analyzing traditional & industrial data and biological factor estimation of five tuna species (LOT, KAW, FRI, YFT, SKJ,) in Hormuzgan province in 1377 and 1378 execute-l the quota of traditional catch section is 1377 is 14087 tonnes constitute 76% LOT KAW, FRI, 2.2% and in 1378 is 16384 tonnes constitute LOT, KAW, 2.2% FRI and 027% Y FT. Most of them caught by drift gillnet. The quato of SKJ in these year is less than 500 kg. The quota of industrial catch section belonging to purse-seiners Azadegan I & 2 in1377 is 1699 tons constitute 47% LOT, 42% YFT, 11% other species and in 1378 is 21 13 tons constitute 62% LOT, 37% YFT, 0.5% SKJ and 0.5% other species. Catch rate of these purse-seiners are 9.3 in 1377 and 10.4 in 1378 tons per fishing days. Biological parameters (K, In, M, F, Z, E) and relationship between fork length-weight & Gill girth-fork length were estimated annually. Major spawning season of LOT obtained in summer with a peak in mordad.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Tuna fishes ; Growth ; Mortality ; CPUE ; Spawing season of LOT ; Stocks
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 196pp.
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