ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    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.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Some biological Aspects of 8 marine species of Hormozgan (2018)
    Details
    Publication Date: 2021-05-19
    Description: A Study was carried out on spawning season, feeding and some environmental conditions of 8 aquatic species of Hormozgan sea waters from Oct. 91 to Mar. 93. The results showed that spawning peak for otolithes ruber, Psettodes erumei, Pomadasys kaakan, Arius thalassinus and Arius tenuispinis occured in spring, for Pampus argenteus and Parastromateus niger occurred in summer, and for Sopia pharaonis occurred in Autumn. Two summer spawner and two Arius species were appeared Lo he very gluttonous and other spring spawner species showed rather less tendency for feeding P.argenteus appeared to eat copepod and rhizosolenia and P.niger stomach contents included nematod and annelid worms and also copepod, P.erumei feeds on small fishes and others eat crustaceae and small fishes too. High growth coefficients for P.argenteas and A.renuispinnis a medium growth coefficient for P.niger and low growth coefficients for other species were obtained. Except for S.pharaonis, geographical distribution did not differ singnificantly (α〈0.05). The zooplankton and phytoplankton were identified with different monthly and locally densities Depth pH and salinity had little variation in spawning seasons. mean dissolved oxygen and water depth temperature ranged between 3.48 to 6.05 and 21.85 to 31.05 respectively (α 〈0.05).
    Description: Published
    Keywords: Aquatic ; Species ; Otolithes ruber ; Psettodes erumei ; Pomadasys kaakan ; Arius thalassinus ; Arius tenuispinis ; Pampus argenteus ; Parastromateus niger ; Sopia pharaonis ; P.argenteus ; Rhizosolenia ; P.niger ; P.erumei ; Spawning ; Feeding ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1-13
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Investigation of genetic variation and sexual diversity of different populations of Gracilaria corticata in the Persian Gulf and Oman Sea using ISSR markers (2018)
    Details
    Publication Date: 2021-05-19
    Description: ISSR markers were used to determine the genetic variation and sex determination of the three life-stages of 41 samples of Gracilaria corticata from two regions of the Persian Gulf and Oman Sea namely Bostaneh and Lipar. The specimens were cultured in PES media to observe the different life stages. DNA was extracted by modified CTAB method. After screening of 20 ISSR primers, four primers were selected that produced clear reproducible fragments and were suitable to find sexual diversity for further analyses. The four primers generated 75 bands ranging from 250 to 3000 bp, corresponding to an average of 18.75 bands per primer. A set of four anchored primers amplified 75 bands out of which 100 % were polymorphic among 41 samples. PIC value ranged from 0.28 to 0.33 and marker index ranged from 4.48 to 6.51 per primer. The mean value of Shannon’s index was 0.45. By using primer "AB","ABC1" were identified three life stages of this alga. Primers "A" and "C" were also able to detect diploid tetrasporophyte but haploid males and females was determined by "A" and "C" respectively. Gst value was 0.058, indicating that 83% of the genetic diversity resided within the population. Clustering analysis using WARD algorithm based on Nei's Unbiased Measures of Genetic distance, classified the G. corticata individuals into five major groups. The PCOA data confirmed the results of clustering. The results of this study reveal that ISSR markers could be used efficiently for genetic differentiation of G. corticata individuals in different regions.
    Description: Published
    Keywords: Aquaculture ; Sexual diversity ; ISSR Markers ; Red algae (Gracilaria corticata) ; Investigation ; Genetic ; Variation ; Populations
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.1009-1026
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Morpho - anatomical studies on red alga Gracilaria corticata in the Persian Gulf and Oman Sea (2017)
    Details
    Publication Date: 2021-05-19
    Description: The speciemns of red algae “Gracilaria corticata” were collected from the rocky intertidal shores in Bostaneh Port in the Persian Gulf and Lipar in Oman Sea in May, June and August 2013. Anatomical, morphological structures, thallus of vegetative and reproductive samples were studied. Carpogonial and tetrasporangium stages were determined based on histological and morphological methods. The female thallus, the Cystocarp with hemispherical structure through out thallus were observed. The Spermatangial conceptacle was located deeper as the oval shape in male thallus. The tetrasporophytic stage of diploid samples was determined by the presence of tetrasporangium oval shape.
    Description: Published
    Keywords: Red algae ; Gracilaria corticata ; Morphology ; Anatomy
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.60-71
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 5
    facet.materialart.
    Unknown
    A study on industrial fisheries of Tuna Fishes in Oman Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Some investigation were performed on the industrial fisheries of tuna in Oman Sea in 1996. The result showed that the total fisheries of Spanish purse seiners, Montelape & Montealegre, were more than 8907 tons; yellow fin tuna (91%) and longtail tuna (9%) from March to September 1996. Their activity was in the Indian Ocean from September 1996 to March 1997. Using Jahadpozm longliner, 204 tons of tuna including yellow fin tuna (99.2%) and swordfish (〈 1%) were fished in Oman Sea during a 9 month period in the years 1995 & 1996. The CPUE of these purse seiners were 40 tons per fishing day which was noticeable in comparison with 21 tons of purse seiners in the Indian Ocean and indicated the richness of EEZ of Oman Sea. Longtail tuna mostly were fished by Spanish vessels in western regions of 600 longitude and yellow fin tuna were caught from 57º to 62º longitudes in Oman Sea. Comparing the length distribution of yellow fin tuna caught by industrial and artisanal fisheries showed that the larger size of exploited fish by purse seiners were generally bigger than those caught by artisanal vessels.
    Description: Published
    Keywords: Industrial fisheries ; Tuna ; Fishes ; Montelape ; Montealegre ; Yellow fin tuna ; Longtail tuna ; Size ; Artisanal ; Vessels
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.27-54
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 6
    facet.materialart.
    Unknown
    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.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 7
    facet.materialart.
    Unknown
    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.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 8
    facet.materialart.
    Unknown
    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.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 9
    facet.materialart.
    Unknown
    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.
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 10
    facet.materialart.
    Unknown
    Survey on source of Yellowfin Tuna (Thunnus albacares) in Hormozgan Province, Iran (2018)
    Details
    Publication Date: 2021-05-19
    Description: Survey was made for determination of some biological parameters of Yellowfin tuna in Hormozgan province (during 1995 to 1996) and it was determined that catch of above mentioned species in 1996 by gillnet was nearly 1133 tons. Comparing the length of the fish caught by industrial way with traditional way shows the bigger sizes were caught in industrial way. Yellowfin tuna was caught in the east Hormozgan strait specially Kouh-Mobarak and Gask to Meidani areas and the peak of hunting time was in April and September to December months. The maximum length of Yellowfin tuna was 158 cm and the minimum was 38 cm. The relationship between their weight and length was W=6.2 x 10-5 L 2.7283. Their length and weight coefficient were estimated by these formula: L∞=181.62 cm, K=0.54 y-1, and natural mortality, fishing mortality and total mortality are: Z=2.37, F=1.67 and M=0.70.
    Description: Published
    Keywords: Biological ; Industrial ; Survey ; Yellowfin Tuna ; Thunnus albacares ; Species ; Gillnet ; Weight ; Length ; Mortality ; Size ; Parameters
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.87-106
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...