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  • Persian Gulf  (12)
  • Stock assessment  (6)
  • Distribution  (4)
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  • 11
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    Stock assessment of sardine and anchovy in Hormuzgan Province with emphasize on fisheries data (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25463 | 18721 | 2018-09-26 10:37:45 | 25463 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Stock assessment of sardine and anchovy fishes in Persian Gulf and Oman Sea (Hormuzgan province) using fish population dynamics parameters and stock assessments models were carried out to estimate maximum sustainable yield (MSY) from 2010-2012. Results of 16 years (1996-2012) fisheries data analysis showed the mean of CPUE (catch/shooting) were calculated for Gill nets, Beach siene and Purse siene as 134, 988 and 2338 kg/shooting respectively. Relationships of catch and effort were determined for Qeshm area (R2=0.94) , Bandar Lengeh area (R2=0.51) and Jask area (R2=0.73) as a polynominal increasing model. Population dynamics parameters using monthly length frequency of 10540 sardine and 8232 anchovy by FiSAT II from Persian Gulf (Qeshm-Bandar Lengeh) and Oman Sea (Jask) fishing areas. Growth parameters K and L_∞ of sadine (Sardinell sindensis) were estimated 1.18 y^-1 and 19.1 cm in Persian Gulf and 1.11 y^-1 and 19.1 cm in Oman Sea, and also for anchovy (Encrasicholina punctifer) were estimated 1.20 y^-1 and 9.2 cm in Persian Gulf and 1.18 y^-1 and 9.3 cm in Oman Sea. Anually, 5 cohorts for sardine and 2 cohorts for anchovy were estimated using Bhattacharya method in Persian Gulf and Oman Sea. Natural mortality (M) and fishing mortality (F) were estimated for this species, and exploitation rate of sardine were calculated as 0.58 and 0.44, and exploitation rate of anchovy were 0.54 and 0.34 in Persian Gulf and Oman Sea respectively. Length of catch (LC) were calculated 11 cm and 12 cm, and for anchovy 6.8 cm and 6.6 cm in Persian Gulf and Oman Sea respectively. Length–weight relationships of sardine and anchovy were calculated as isometric growth. Results of this study showed that populations of sardine and anchovy in Qeshm and Bandar Lengeh area are a single-unite stock, no enough evidence for discrimination of sardine and anchovy populations in Persian Gulf and Oman Sea. The mean anuall biomass of sardine and anchovy were estimated using Thompson and Bell model 190000 tones in Hormuzgan province. Maximum sustainable (MSY) of sardine and anchovy were estimated between 59721 and 98309 tones in this area. MSY of sardine were calculated 15222 and 3182 ton and MSY of anchovy were 36237 ton and 5080 ton, for minimum of estimated MSY in Persian Gulf (Bandar Lenghe-Qeshm) and Oman Sea (Jask) respectively. Using yield per recruit of Beverton and Holt model , F0.1 were estimated averagely 1.75 for sardine and anchovy in Hormuzgan province and its showed the underfishing condition. Survey of catch and efforts trend in sardine and anchovy, defined development phase of small pelagic fisheries in Hormuzgan province.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Oman Sea ; Hormuzgan province ; Qeshm ; Bandar Lengeh ; Jask ; Sardine ; Anchovy ; MSY ; CPUE ; Population dynamics ; Stock assessment ; Gill nets ; Growth ; Mortality ; Species ; Fisheries
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 124
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  • 12
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    Stock assessment of banana shrimp (Penaeus merguiensis) in coastal waters of Hormozgan Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25482 | 18721 | 2018-10-05 06:56:38 | 25482 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The survey was conducted during 2010 and 2011 on the banana prawn stocks in Sirik to Dargahan in Strait of Hormoz. Samples was taken by bottom trawl boats monthly. Growth in the prawns (male and female) was allometric and length of maturity in female was 31.7 (mm CL). Spawning season was occurred in winter from Jan to March. Growth parameters (K, L_∞) were 1.6 y^-1 and 49 (mm CL) for female and 1.9 y^-1 and 38 (mm CL) for male respectively. Instantaneus mortality rate (M, F and Z) calculated 2.6, 1 and 3.6 y^-1 for female and 3.1, 1.4 and 4.5 y^-1 for male respectively. Banana shrimp recruited at to fishing ground in Jun and Jul. Opening time for starting catch at 2010 was calculated at 28/09/2010 and total allowable catch was 1380 tones. At 2011 starting catch was calculated at 29.09.2011 and total allowable catch was 1480 tones. Time for end of catch season were stimated at 04.11.2010 and 21.11.2011 for each year. According to yield per recruit model, the best size of the banana prawn was 30 (mm CL) for female.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Oman Sea ; Hormozgan province ; Banana shrimp ; Penaeus merguinsis ; Stock assessment ; Yield per recruit ; Spawning ; Season ; Survey ; Coastal waters
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 63
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  • 13
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by swept area method (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25752 | 18721 | 2018-10-13 06:16:11 | 25752 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    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 stratum M (Biahi to Galak estuary) showed the lowest value of biomass for both commercial and non-commercial fishes. With review the mean CPUA in different 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.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Oman Sea ; Commercial fishes ; Non-commercial fishes ; Biomass ; CPUA ; Species ; Estimation ; Method ; Area ; Demersal resources
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 264
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  • 14
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    Assessment of dominant species food relation in habitats of commercial shrimp in Hormuzgan Province waters (Persian Gulf) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25837 | 18721 | 2018-10-13 10:15:56 | 25837 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Shrimp is one of the most important aquatic animals,that have decreased their stocks in Hormozgan province, especially the eastern province . Evalution of food interaction in shrimp habitats (Estuaries of Tyab, Yek shabeh, Laft and Khouran) was studied with Ecopaht with Ecosim software (ver. 6.5) in Hormuzgan province. After entering the input components (Biomass,P/B and Q/B), model was balanced and outputs were extracted. Results of trophic levels, was close to previous research in these areas for all species in estuaries. Maximum of ecotrophic efficiency was belonged to phytoplankton and other preys that were observed in predator stomachs. Biological future of food web estimated to be threatened based on omnivore index of planktonivore groups. Maximum food competition between the four food models was estimated in detritivores communities in Laft estuary, that may be related to the low density of mangrove in this region. Khamir estuary ecosystem could be more stable, because each impacting group had its own separate ecological niche and special predation territory. key indices in each of four food models were related to phytoplankton communities, this key role has been demonstrated much better in Yek Shovy estuary than others. Future of commercial shrimp stocks will be expected to be in better condition in Khoran estuary compared to other three ones, due to selection of separate ecological niche by predators and High biomass of detritus in this estuary.
    Keywords: Biology ; Ecology ; Iran ; Persian Gulf ; Hormuzgan Province ; Ecopath ; Shrimp ; Habitats ; Estuary ; Assessment ; Dominant Species ; Food
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 57
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  • 15
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    Growth parameters and mortality rates of whipfin silver-biddy (Gerres filamentosus) and longtail silver-biddy (Gerres longirostris) from creeks of Hara protected area in Jask, Iran (2021)
    In:  http://aquaticcommons.org/id/eprint/21872 | 18721 | 2018-01-15 08:49:51 | 21872 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: Population parameters of Whipfin silver-biddy (Gerres filamentosus) and Longtail silverbiddy (Gerres longirostris) were studied from January to December 2006 in three creeks (Markazi, Khalasi and Gabrik) of Hara protected area in Jask, Oman Sea. All fishes were sampled by boat trawl and beach seine. Growth parameters were determined using the monthly length–frequency parameters. The Mean total length was calculated at 6.2 and 5.4cm for Whipfin silver-biddy and Longtail silver-biddy. The values of L∞ and K for Whipfin silver-biddy were 16.8cm and 0.99 yr-1 and for Longtail silver-biddy, these were 15cm and 0.77 yr-1, respectively. The value of to was calculated at -0.12 year for both species. The longevity was estimated to be 3 years for Whipfin silver-biddy and 3.8 years for Longtail silver-biddy. The length-weight relationship were determined as W= 0.0088 L3.21 and W= 0.0087L 3.18 for Whipfin silver-biddy and Longtail silver-biddy, respectively. Results showed the fish were in their juvenile stage which emphasized the supporting roles of creeks for Gerridae as nursery ground.
    Keywords: Biology ; Environment ; Fisheries ; Stock assessment ; Population dynamic ; Gerridae ; Oman Sea ; iran ; Gerres filamentosus ; Gerres longirostris ; Jask ; Growth ; parameters
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 139-150
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  • 16
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    Study of biotic communities for artificial reef placement in Hormuzgan Province waters, the Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/21830 | 18721 | 2018-01-11 10:22:07 | 21830 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: Persian Gulf waters (Hormuzgan Province) were studied from seasonally to determine the best locations for installation of artificial reefs. The area was stratified for 10 transects and each transect was divided into three stations: Station 1 for waters below 10m, station 2 for waters between 10 and 20m and station 3 for waters between 20 and 30m deep. Habitats of fauna and flora including communities of corals, seaweeds, sea cucumbers and sea grasses and sedimentation depth through scuba diving were studied in each transect and sub-transects. Sea grass communities existed in some spots within station 1 in Bandar Mesan, Bandar Lengeh, Kish Island and Bandar Chirooyeh transects, while for station 2, sea grasses were absent from Chirooyeh transect and present in Bandar Mesan, Bandar Kong and Kish Island transects. Also, seaweed habitats existed in station 1 in Bandar Mesan transect and some areas in Bandar Lengeh transect. Study of coral and sea cucumber communities indicated existence of Acropora sp. habitats in Bahman jetty, Bandar Mesan and Bandar Bostaneh transects, Porites sp. habitat in Hengam Island transect, Holothuria sp. habitats in Bandar Mesan and Bandar Lengeh transects and Stichopus sp. habitat in Hengam Island transect. All of these habitats were located in station 1 and had patchy distribution which was drawn in GIS software. Calculated sedimentation depth using degree scale in different transects demonstrated statistically significant differences between station 1 in Bandar Salakh transect and the same stations in other transects, also between station 2 and station 3 in other transects (P〈0.05). The result of sedimentation depth assessment showed that station 2 in Bandar Lengeh area up to Hendurabi Island were better for artificial reefs installation compared to south of Gheshm Island with the exception of Bandar Kong and Bandar Chirooyeh transects.
    Keywords: Biology ; Conservation ; Fisheries ; Artificial reef ; GIS ; Coral ; Sea cucumber ; Seaweed ; Sea grass ; Persian Gulf ; Iran ; Acropora ; Stichopus
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 9-16
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  • 17
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    Study of existing biological communities in Hormuzgan province waters (Persian Gulf) for installation of artificial reefs (2021)
    In:  http://aquaticcommons.org/id/eprint/21847 | 18721 | 2018-01-14 19:25:43 | 21847 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: To determine the suitable locations for installation of artificial reefs we studied Persian Gulf waters (Hormuzgan province) from December 2006 to March 2007 seasonally. The area was stratified to 10 transects and each transect was divided to three layers and used random sampling method. Habitats of fauna and flora including: Communities of corals, seaweeds, sea cucumbers and sea grasses, and sedimentation depth using SCUBA diving method were studied in each transect and layer. Sea grass communities existed in some places with below 10m depth of Bandar Mesan, Bandar Kang, Kish Island and Bandar Chirooyeh transects. Also, seaweed habitats were seen in Bandar Mesan and some areas in Bandar Lengeh and Kish Island in 10-20m depth transect. The study of coral and sea cucumber communities indicated presence of Acropora sp. habitats in Bahman jetty, Bandar Mesan and Bandar Bostaneh transects , and Porites sp. habitats in Hengam island transect, Holothuria sp. habitats in Bandar masen and Bandar Lengeh transects and Stichopus sp. habitat in Hengam Island transect. All these species were found in shallow waters bellow 10 meters depth and showed a patchy distribution. Sedimentation depth results showed a statistically significant difference between layer 〈10m in Bandar Salakh and the same layers in other transects, also between layer 10-20m and 20-30m in other transects. Based on the sedimentation depth and habitats studies, we recommend layer 10-20m in Bandar Lengeh area and Bandar Lengeh to Hendurabi Island area as suitable for artificial reefs installation.
    Keywords: Biology ; Ecology ; Fisheries ; Artificial reef ; Coral ; Sea cucumber ; Seaweed ; Sea grass ; Persian Gulf ; iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 23-32
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  • 18
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    Population dynamics and reproduction biology of slender mudskipper (Scartelaos tenuis) from Hormuzgan Province creeks, Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/21936 | 18721 | 2018-01-17 12:33:06 | 21936 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-05
    Description: Slender Mudskipper (Scartelaos tenuis) is one of the dominant fishes in inter-tidal mud flats area. Reproduction and population parameters of 2047 Slender mudskipper were studied monthly from october 2008 to september 2009. The asymptotic length (L∞) and growth coefficient (K) were estimated as 19.43(cm) and 0.64(yr-1), respectively. The minimum and maximum T.L. was 1.1 and 19.5cm, respectively. The value of to was -8.28, and Tmax was 4.6 year. The growth equation of Von Bertalanffy was obtained at L(t) = 19.43(1- exp (-0.64(t(-0.28))) for this species. The rates of natural mortality (M) on Pauly's empirical equation, was estimated 1.51 (yr-1). Five cohorts were distinguished annualy on Bhattacharya's method with mean length of 7.89, 11.42, 13.86, 15.6 and 16.81cm. Maximum recruitment was in Seprember at 18.8 percent. Reproductive studies showed that peak of maturity season occurred in April. The female to male ratio was calculated as 1:1.47 and chi-square analysis showed that it was statistically significant deviated from 1:1. LM50 is attained at a total length of 13.3cm. The mean of absolute and relative fecundity were 6742 (±1939) and 707 (±210), respectively. The length-weight relationship was as W= 0.02735 L 2.1655, that was isometric growth. Result showed that slender mudskipper population was in congenial condition, nevertheless less not evaluated.
    Keywords: Biology ; Fisheries ; Gobidae ; Biology charactertic ; Mangrove forets ; Population ; reproduction ; biology ; Slender Mudskipper ; Scartelaos tenuis ; Hormuzgan province ; Persian Gulf ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 37-48
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  • 19
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    A survey on black mouth Croaker (Atrobucca nibe) resources in the north-west of Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25531 | 18721 | 2018-10-05 15:27:32 | 25531 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Blackmouth croackers (Atrobucca nibe) resources are the most important commercial stocks in the north-west of Oman Sea, exploited as lantern fisheries by catch with trawlers vessel. At least 50 specimens were sampled monthly from September 2012 to July 2014. Results showed blackmouth croacker have several small peak in gonado-somatic index, but the most frequency of adults occurred in May. The female: male ratio was calculated 1:0.8 and the LM_50 was estimated at 35 cm. The mean of absolute and relative fecundity were estimated 92988 and 223 respectively. LM_50 and LC_50 were calculated and the results showed this species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. The mean of egg diameter for black mouth croaker were calculated at 533±103. Linear model of Fecundity= 9597.6TL-233880 was calculated for length-fecundity relationship . Results of feeding showed lantern fishes (65%), shrimps (11%), Japanese threadfin bream (13%) and the other fishes (11%) were the main feeding regime of black mouth croaker. This species was carnivore, the food prefect mainly consisted of lantern fishes (57.7%) and shrimps (28.2%). The vacuity index (87.7 %) indicated this spices was low appetite fish. Total length range was 18 to 47.5 cm with mean length of 28.7 cm, and the class of 23-24 cm was the most frequent length in fishing ground. The length-weight relationships in A. nibe were calculated for female and male W= 0.0121L2.9385 and W= 0.0075L3.0737 respectively, both have isometric growth. Growth parameters of L_∞ and K were estimated 50 cm and 0.2 y^-1 respectively. Parameters of t0, Tmax and Ǿ were calculated -0.7 year, 14 year and 2.69 respectively. This species have two recruitment period, and the peak of recruitment was occurred in May with 23.14 percent. Total mortality , natural mortality and fishing mortality rates were calculated 0.53 y^-1, 0.46 y^-1 and 0.07 y^-1 respectively. Due to the calculated exploitation rate (0.13), it is appreciated the improvement of black-mouth croaker in the Oman Sea. Base on seasonal and monthly CPUE it was resulted the peak of fishing density were occurred in the winter. Results showed the main distribution of black-mouth croaker concentrated on the continental slope in 200 m depth, but these stocks move to deeper waters (more than 200m) in warm season and extend to shallow waters (less than 200m) in winter.
    Keywords: Biology ; Fisheries ; Iran ; Oman Sea ; Atrobucca nibe ; Reproduction ; Feeding ; Growth Parameters ; Mortality rates ; Exploitation rate ; Distribution ; Survey ; Black mouth Croaker
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 87
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  • 20
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    Monitoring of shrimp stocks in order to optimize the management of fisheries in the Hormozgan province (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Goals of this investigation were optimum times to harvest and ban and determination of total allowable catch (TAC) of shrimp in Hormozgan in the year of 2016. Sampling was by bottom trawler boats in the habitate of shrimp stock in Sirik to Dargehan on three month occur befor the catch season was started. Optimum times to harvest and ban was offered on 2016/10/5 and 2016/11/21 resprctively. Total allowable catch for main species (banana, tiger and indian white shrimp) and other species (jinga and stebbinji) estimated 830 and 350 tones, totally 1180 tones. Main challenges in recent years that affected living resources such as shrimp, are three subjects, climate changes, use coastal areas in wrong ways, and illegal shrimp fisheries which can effect on recruitment of shrimp to fishing area.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Banana shrimp ; Penaeus merguiensis ; Stock assessment ; Monitoring ; Fisheries
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 50pp.
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