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  • Feeding  (6)
  • Encrasicholina punctifer  (3)
  • Nutrients  (3)
  • Aquaculture
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  • 1
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    Feeding behaviour of lantern fishes (2018)
    Details
    Publication Date: 2021-05-19
    Description: During the project of "Stock assessment of mesopelagic resources with Acoustic method", the feeding of lantern fishes was studied and it was found out that they are specified zoophagues. The most abundant of their stomach contents contain Copepods and Ostracods and with less important, the other stomach contents were Brachyuran larvae, Tintinnids, polychaeta, chaetognatha, Appendicularia, lamellibranchia, shrimp's larvae, different lchthioplanktons, crustacean appendages, juvenile squids and some other unidentified zooplanktons. The Diatoms (as a random food) were rarely found in their stomachs. Also, small and juvenile lantern fishes formed a part of their stomach contents and it proved the cannibalism behaviour of this fish. This behaviour occurs mostly during daytime but the main time of myctophid's feeding occurs during night time.
    Description: Published
    Keywords: Feeding ; Copepod ; Ostracod ; Larvae ; Tintinnid ; Polychaete ; Chaetognatha ; Appendicularia ; Lamellibranchia ; Juvenile ; Zooplankton
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.21-29
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  • 2
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    Hydro biological study of Laft & Khamir (Khooran Estuaries) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Coastal area with a complex ecosystem such as estuaries, lagoons, creeks and are special for nursery grounds, developing area for short time of larva of most marine organisms with high potential rate. Khooran estuaries are of high ecological importance in Hormozgan waters. In this study, fluctuations some biological and hydrological factors were Inonitored from Apr, 1999 to Apr, 2000 monthly, in khooran estuaries. Thirty-nine groups of fishes, 23 families of Ichthyoplanktons, 6 groups of macrobenthose and 54 genera of phytoplanktons were identified. Frequency and weight of sampled fishes was high during Oct, Nov, May & July J respectively. Density of Ichthyoplanktons were higher in west branch, of estuary the most frequency of ichthyoplankton were related to Clupeidae, Gobiidae, uscianidae. Amongst phytoplanktons diatoms density were higher than dinoflagellates and cyanophyceae. Nematoda, Gastropod and Bivalve had the most density of Macrobenthos In west branch & Bivalve, Polychaeta and Crustacea were the most frequent groups at , macrobenthose in the east branch estuarjes, Chlorophyl a, nutrients (N03.N02T04.Si02) ), Poc,' Oc, Do, pH, Salinity & Temperature were measured from 12 sampling stations. Results showed that photosynthesis and photosynthesis Pius detritus are the main resources of Poc In east and west branches respectively (P〈0.05) Sediment composition were made mostly of fine sand in mouth of estuarine branches and of silt & clay in other parts. Oxidized carbon rate showed a direct relationship with silt (r =9), and clay (r = 0.79) percentage.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Ichthyoplanktons ; Ecosystem ; Phytoplanktons ; Diatoms ; Nematoda ; Gastropod ; Bivalve ; Nutrients
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 137pp.
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  • 3
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    Biological survey on Penaeus indicus in the Jask area (Oman Sea) (2018)
    Details
    Publication Date: 2021-05-19
    Description: The indian white prawn (Penaeus indicus), as one of the commercially important and dominant species along the East coast of Hormozgan province, is a very potential and prospective candidate species for shrimp farming. Since, there wasn't well enough information about biology of this species from Iranian wateres, therefore. some biological aspects such as growth rate, reproduction behaviour distribution pattern and feeding habits were studied from March 1997 to March 1998. Monthly sampling were carried out from the fishing grounds and estuaries of Jask area in the Oman Sea by small trawlers and beach seines gears. Initial growth 01 male was faster than female, with calculated K=l.5 for male and K=1.3 for female. Isometric growth trend was observed in both sexes. Sexual maturity attained within the first 12 months. Spawners were occured abundantly during post-winter, spring and beginning of summer. Postlarvae and sub-adults were found in the esturies with 25-100 mm length, and high densities were observed around the mangrove's roots. They spend at least 3 to 5 months of their life span in the esturies. Analysis of stomach contents revealed that this species is an omnivore with indicative contents of detritus, polychaetes, crustaceane, bivalves, algae and sand particles, with preponderance of vegetable constituents in the sub-adults and of detritus in adults.
    Description: Published
    Keywords: Commercially ; Biological ; Penaeus Indicus ; Growth ; Spawning ; Feeding ; Indian White Prawn ; Species ; Shrimp farming ; Male ; Female ; Polychaetes ; Bivalves ; Algae ; Sand particles ; Crustaceane
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.43-52
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  • 4
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    Hydrology and Hydrobiological monitoring in the Northeastern part of the Persian Gulf and Strait of Hormoz (Hormozgan Province Water) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Hydrology and Hydro-biological monitoring in the Northeast Persian Gulf and strait of Hormuz (Hormozgan Province waters) were conducted during 2003-2004.The project was implemented using R/V Ferdous.The sampling area included the stretch of the Iranian waters along the northeast part of the Persian Gulf and Strait of Hormuz in Hormuzgan province. Along this stretch 7 equally distributed transect at a distance of 40 miles from one another were designated ; 3 main sampling stations at a distance of 20 miles from one another were fixed at each transect. Sampling was conducted twice per annun from Feb . 2003 to Feb. 2004. Summer & winter values of some Physico-chemical factors in surface layers of Hormozgan waters were recorded as follows: Temprature 33±0.082 , 21.8±0.67 ?c ; EC 66.1±1.52 , 53.3±0.66ms/cm ; Salinity 37.9±0.54, 37.8±1.6 ppt , Density 22.9±0.39 , 25.5±0.99 kg/m3, Dissolved oxygen 5.4±0.26 , 6.7±0.35 ppm ; pH 8.2±0.02 , 8±0.03 ; chlorophyll-a 0.7±0.4 , 1.3±0.72 mg/m3 and Turbidity 6.1±0.92 , 5.7±0.67 FTU. According to the result a seasonal thermocline appears in the Iranian waters during summer and disappear during winter, extended with its maximum formation in summer . The temperature differences between surface and bottom waters was 12?C. The thermocline diminishes near the Strait of Hormuz area, horizontal and vertical distribution recorded. Increase in salinity and density from northeast towards northwest and from surface to depth. Electrical conductivity depends on temperature in summer but in winter depend on salinity. Dissolved oxygen was higher in the layer of 5-20m and decrease with increasing depth. Maximum chlorophyll-a was recorded in layers of 10-30m and 5-20m in summer and winter respectively. The density of nutrients increase from surface to depth but decrease from northeast towards northwest and density of nutrients in winter was higher than summer show write how much. Plankton population in this study characterized by 4 phylum and 5 classes of phytoplankton, 6 phylum and 8 classes of zooplankton and 23 family of Ichthyoplankton. Total 63 spices of phytoplankton belonging to 43 Bacillariophyceae, 14 Dinophyceae, 4 Cyanophycea, one Chrysophycea and one Euglenaphycea. Bacillariophyceae inparticular show very high density in winter 83 and Euglenaphycea is dominant group only in winter. Crustaceans were the most dominant group of zooplankton. Calanoids and Cyclopoids were abundant at all stations. Zooplankton were increase from East to West. Among Ichthyplankton, Clupeeiidae family the most abundant, the Gobiidae was in second position and followed by Engrauliide with high density than other family. All together 124 genera belong to 132 families of macro-benthos were identified. As they consist of 59 genera belong to 49 families of Polychaete, 27 genera belong to 44 families of gastropod, 23 genera belong to 27 families of Bivalve, 15 genera belong to 10 families and 2 order of Crustacean and 2 families of Scaphopoda. Additionally some groups of Echiurida, Sipunculida , platyhelminenthes, Echinodermata, Foraminiferans, Cnideriars,Chordata, Cheatognatha and Lophophora were identified. The most dominant groups were Crustacean and Polychaetes in percentage of abundance proportion of studies in last years .The mean biomass of macrobenthos has been decreased to 4.7 g/m. Note: Some species of macro-benthos identified up to family
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Hydrology ; Hydro - biological ; Physico-chemical ; Seasonal Thermocline ; Oxicline ; Holocline Macro-Benthos ; Plankton ; Ichthyoplankton ; Nutrients ; Sampling ; Temprature ; Salinity ; Dissolved oxygen ; Population ; Phylum ; Cyanophycea ; Chrysophycea ; Euglenaphycea ; Echiurida ; Sipunculida ; Platyhelminenthes ; Echinodermata ; Foraminiferans ; Cnideriars ; Chordata ; Cheatognatha ; Lophophora
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 126pp.
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  • 5
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    Biological survey on small pelagic fishes (sardine & anchovy) stocks in coastal waters of Hormuzgan province (Qeshm Island & Bandar Lengeh) with emphasis on Sea surface temperature, Plankton distribution and Chlorophyll-a (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Investigation on small pelagic fishes in the north of the Persian Gulf (Qeshm Island and Bandar Lengeh) coastal waters during October 2006 to September 2008, illustrated that 6 sardine and 2 anchovy species were locally existed. Sind sardinella (Sardinella sindensis) and Buccaneer anchovy (Encrasicholina punctifer) were dominated in this area. The peak of sexual maturity for Sind sardinella and Buccaneer anchovy occurred in spring and summer respectively. Reproduction period for Sind sardinella was from the middle of winter to late spring, and Buccaneer anchovy encompassed reproduction capacity all the year. The female: male ratio was calculated 1:0.7 and 1:0.9 for Sind sardinella, 1:1.27 and 1:1 for Buccaneer anchovy in Qeshm Island and Bandar lengeh sequentially. The mean of absolute fecundity were estimated 16234 and 16168 for Sind sardinella, 1277 and 1141 for Buccaneer anchovy in Qeshm Island and Bandar Lengeh respectively. LM50 and LC50 were calculated and the results showed both species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. Both species were planktonivore, theirs food prefect mainly consisted of copepods, naplius and bivalves. Vacuity index indicated both spices were semi-voracious appetite fishes. Based on calculated length-weight relationships in S. sindensis and E. punctifer, they have isometric growth. Growth parameters were estimated, the results illustrated that they were growth fast and short live species, which suggested S. sardinella and E. punctifer have 3 and 2 years maximum life span respectively. The recruitment pattern indicated double recruitment peaks per year in both species. Annually, four cohorts were distinguished in Sind sardinella and 3 cohorts in Buccaneer anchovy. Total mortality (Z), natural mortality (M) and fishing mortality (F) were estimated in both species, and the values of exploitation ratio (0.78 & 0.74) in Sind sardinella and (0.72 & 0.41) in Buccaneer anchovy were reasonable for current fishing effort due their short life span. Analysis of the results showed that CPUE in sardine and anchovy affected by reproduction and feeding processes. Results showed significant correlation between sardine CPUE and Sardine GaSI (P〈0.05, r= 0.499), similarly between anchovy CPUE and anchovy GSI (P〈0.05, r=-0.635). Further, significant correlation between sea surface temperature with sardine CPUE (P〈0.05, r=0.493), phytoplankton distribution (P〈0.01, r=0.560), anchovy GSI (P〈0.05, r=0.526), anchovy GaSI (P〈0.05, r=-0.500) and chlorophyll a (P〈0.01, r=0.780). Phytoplankton distribution with sardine GSI (P〈0.05, r=0.453), zooplankton distribution with anchovy GSI (P〈0.05, r=0.671), and chlorophyll with sardine GSI (P〈0.01, r=0.761) have significant correlation.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Sardinella sindensis ; Encrasicholina punctifer ; Reproduction ; Feeding ; Growth and mortality ; Catch per unit effort ; Sea surface temperature ; Chlorophyll a ; Sexual maturity ; Plankton ; Naplius ; CPUE ; GSI ; Sardine ; Anchovy ; Coastal waters ; Surface ; Temperature ; Distribution
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 134pp.
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  • 6
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    Hydrology and hydrobiological monitoring in the northeastern part of the Persian Gulf and Strait of Hormoz (Hormozgan Province water) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25144 | 18721 | 2018-08-26 13:55:37 | 25144 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Hydrology and Hydro-biological monitoring in the Northeast Persian Gulf and strait of Hormuz (Hormozgan Province waters) were conducted during 2003-2004.The project was implemented using R/V Ferdous.The sampling area included the stretch of the Iranian waters along the northeast part of the Persian Gulf and Strait of Hormuz in Hormuzgan province. Along this stretch 7 equally distributed transect at a distance of 40 miles from one another were designated; 3 main sampling stations at a distance of 20 miles from one another were fixed at each transect. Sampling was conducted twice per annun from Feb. 2003 to Feb. 2004. Summer & winter values of some Physico-chemical factors in surface layers of Hormozgan waters were recorded as follows: Temprature 33±0.082 , 21.8±0.67 ?c ; EC 66.1±1.52 , 53.3±0.66ms/cm ; Salinity 37.9±0.54, 37.8±1.6 ppt , Density 22.9±0.39 , 25.5±0.99 kg/m^3, Dissolved oxygen 5.4±0.26 , 6.7±0.35 ppm ; pH 8.2±0.02 , 8±0.03 ; chlorophyll-a 0.7±0.4 , 1.3±0.72 mg/m^3 and Turbidity 6.1±0.92 , 5.7±0.67 FTU. According to the result a seasonal thermocline appears in the Iranian waters during summer and disappear during winter, extended with its maximum formation in summer. The temperature differences between surface and bottom waters was 12?C. The thermocline diminishes near the Strait of Hormuz area, horizontal and vertical distribution recorded. Increase in salinity and density from northeast towards northwest and from surface to depth. Electrical conductivity depends on temperature in summer but in winter depend on salinity. Dissolved oxygen was higher in the layer of 5-20m and decrease with increasing depth. Maximum chlorophyll-a was recorded in layers of 10-30m and 5-20m in summer and winter respectively. The density of nutrients increase from surface to depth but decrease from northeast towards northwest and density of nutrients in winter was higher than summer show write how much. Plankton population in this study characterized by 4 phylum and 5 classes of phytoplankton, 6 phylum and 8 classes of zooplankton and 23 family of Ichthyoplankton. Total 63 spices of phytoplankton belonging to 43 Bacillariophyceae, 14 Dinophyceae, 4 Cyanophycea, one Chrysophycea and one Euglenaphycea. Bacillariophyceae inparticular show very high density in winter 83 and Euglenaphycea is dominant group only in winter. Crustaceans were the most dominant group of zooplankton. Calanoids and Cyclopoids were abundant at all stations. Zooplankton were increase from East to West. Among Ichthyplankton, Clupeeiidae family the most abundant, the Gobiidae was in second position and followed by Engrauliide with high density than other family. All together 124 genera belong to 132 families of macro-benthos were identified. As they consist of 59 genera belong to 49 families of Polychaete, 27 genera belong to 44 families of gastropod, 23 genera belong to 27 families of Bivalve, 15 genera belong to 10 families and 2 order of Crustacean and 2 families of Scaphopoda. Additionally some groups of Echiurida, Sipunculida , platyhelminenthes, Echinodermata, Foraminiferans, Cnideriars,Chordata, Cheatognatha and Lophophora were identified. The most dominant groups were Crustacean and Polychaetes in percentage of abundance proportion of studies in last years .The mean biomass of macrobenthos has been decreased to 4.7 g/m. Note: Some species of macro-benthos identified up to family
    Keywords: Ecology ; Iran ; Persian Gulf ; Hormozgan Province ; Strait Of Hormuz ; Seasonal Thermocline ; Oxicline ; Holocline Macro-Benthos ; Plankton ; Ichthyoplankton ; Nutrients ; Sampling ; Temprature ; Salinity ; Dissolved oxygen ; Population ; Phylum ; Cyanophycea ; Chrysophycea ; Euglenaphycea ; Echiurida ; Sipunculida ; Platyhelminenthes ; Echinodermata ; Foraminiferans ; Cnideriars ; Chordata ; Cheatognatha ; Lophophora
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 126
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  • 7
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    Biological survey on small pelagic fishes (sardine & anchovy) stocks in coastal waters of Hormuzgan province (Qeshm Island & Bandar Lengeh) with emphasis on sea surface temperature, plankton distribution and chlorophyll-a (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25198 | 18721 | 2018-09-05 16:25:43 | 25198 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Investigation on small pelagic fishes in the north of the Persian Gulf (Qeshm Island and Bandar Lengeh) coastal waters during October 2006 to September 2008, illustrated that 6 sardine and 2 anchovy species were locally existed. Sind sardinella (Sardinella sindensis) and Buccaneer anchovy (Encrasicholina punctifer) were dominated in this area. The peak of sexual maturity for Sind sardinella and Buccaneer anchovy occurred in spring and summer respectively. Reproduction period for Sind sardinella was from the middle of winter to late spring, and Buccaneer anchovy encompassed reproduction capacity all the year. The female: male ratio was calculated 1:0.7 and 1:0.9 for Sind sardinella, 1:1.27 and 1:1 for Buccaneer anchovy in Qeshm Island and Bandar lengeh sequentially. The mean of absolute fecundity were estimated 16234 and 16168 for Sind sardinella, 1277 and 1141 for Buccaneer anchovy in Qeshm Island and Bandar Lengeh respectively. L_M50 and L_C50 were calculated and the results showed both species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. Both species were planktonivore, theirs food prefect mainly consisted of copepods, naplius and bivalves. Vacuity index indicated both spices were semi-voracious appetite fishes. Based on calculated length-weight relationships in S. sindensis and E. punctifer, they have isometric growth. Growth parameters were estimated, the results illustrated that they were growth fast and short live species, which suggested S. sardinella and E. punctifer have 3 and 2 years maximum life span respectively. The recruitment pattern indicated double recruitment peaks per year in both species. Annually, four cohorts were distinguished in Sind sardinella and 3 cohorts in Buccaneer anchovy. Total mortality (Z), natural mortality (M) and fishing mortality (F) were estimated in both species, and the values of exploitation ratio (0.78 & 0.74) in Sind sardinella and (0.72 & 0.41) in Buccaneer anchovy were reasonable for current fishing effort due their short life span. Analysis of the results showed that CPUE in sardine and anchovy affected by reproduction and feeding processes. Results showed significant correlation between sardine CPUE and Sardine GaSI (P〈0.05, r= 0.499), similarly between anchovy CPUE and anchovy GSI (P〈0.05, r=-0.635). Further, significant correlation between sea surface temperature with sardine CPUE (P〈0.05, r=0.493), phytoplankton distribution (P〈0.01, r=0.560), anchovy GSI (P〈0.05, r=0.526), anchovy GaSI (P〈0.05, r=-0.500) and chlorophyll a (P〈0.01, r=0.780). Phytoplankton distribution with sardine GSI (P〈0.05, r=0.453), zooplankton distribution with anchovy GSI (P〈0.05, r=0.671), and chlorophyll with sardine GSI (P〈0.01, r=0.761) have significant correlation.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Qeshm Island ; Bandar Lengeh ; Sardinella sindensis ; Encrasicholina punctifer ; Reproduction ; Feeding ; Growth and mortality ; Catch per unit effort ; Sea surface temperature ; Chlorophyll a ; Sexual maturity ; Plankton ; Naplius ; CPUE ; GSI ; Sardine ; Anchovy ; Coastal waters ; Surface ; Temperature ; Distribution
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 134
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  • 8
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    Unknown
    Feeding behaviour of lantern fishes (2021)
    In:  http://aquaticcommons.org/id/eprint/23607 | 18721 | 2018-07-12 13:19:30 | 23607 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-14
    Description: During the project of "Stock assessment of mesopelagic resources with Acoustic method", the feeding of lantern fishes was studied and it was found out that they are specified zoophagous. The most abundant of their stomach contents contain Copepods and Ostracods and with less important, the other stomach contents were Brachyuran larvae, Tintinnids, polychaeta, chaetognatha, Appendicularia, Lamellibranchia, shrimp's larvae, different lchthioplankton, crustacean appendages, juvenile squids and some other unidentified zooplankton. The Diatoms (as a random food) were rarely found in their stomachs. Also, small and juvenile lantern fishes formed a part of their stomach contents and it proved the cannibalism behavior of this fish. This behavior occurs mostly during daytime but the main time of myctophid's feeding occurs during night time.
    Keywords: Biology ; Feeding ; Copepod ; Ostracod ; Larvae ; Tintinnid ; Polychaete ; Chaetognatha ; Appendicularia ; Lamellibranchia ; Juvenile ; Zooplankton ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 21-29
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  • 9
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    Reproduction and feeding of Buccaneer anchovy (Encrasicholina punctifer) from coastal waters of Qeshm Island, the Persian Gulf (2021)
    In:  http://aquaticcommons.org/id/eprint/23695 | 18721 | 2018-07-18 07:45:16 | 23695 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Encrasicholina punctifer is one of the dominant small pelagic and economically most important fishes of the Persian Gulf, especially in Qeshm Island's coastal waters. Specimens of the fish were collected monthly from the fishing area in the coastal waters of Qeshm Island by random sampling method. Investigation on biological parameters of E. punctifer continued from April 2005 to March 2006. E. punctifer is mainly caught by double-boat purse seine in this area. Reproductive studies showed that maturity season of the fish occur in August. The sex ratio fulfill the theoretical 1:1 (P〉0.05). L sub(M50) was attained at a total length of 84 mm. The absolute fecundity was estimated at 1217 plus or minus 331. We showed that the species is planktonivore, its diet consisted of a board spectrum of food types, but crustaceans dominated the food with copepods and their eggs, naplius and semi digested copepods constituting 54% of the diet. The next major food groups found in the diet of the fish were Cyanophyceae 21%, Bacillariophyceae 11%, fish egg and scale 6%, Dinophyceae 4%, with Euglenahyceae, Chiorophyta, Dinoflagellates and others items consisting only 4% of the diet. Analysis of monthly variation in the stomach fullness indicated that feeding intensity fluctuated throughout the year, with the highest value in winter. Vacuity Index indicated this species was of semi-voracious appetite fishes.
    Keywords: Biology ; Fisheries ; Fecundity ; Feeding behaviour ; Sex ratio ; Reproductive cycle ; Fishery biology ; Pelagic fish ; Marine ; Food organisms ; Season regulations ; Encrasicholina punctifer ; Qeshm Island ; Hormuzgan ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 45-54
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  • 10
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    Biological survey on Penaeus indicus in the Jask area (Oman Sea) (2021)
    In:  http://aquaticcommons.org/id/eprint/24813 | 18721 | 2018-08-06 17:26:29 | 24813 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: The indian white prawn (Penaeus indicus), as one of the commercially important and dominant species along the East coast of Hormozgan province, is a very potential and prospective candidate species for shrimp farming. Since, there wasn't well enough information about biology of this species from Iranian wateres, therefore. some biological aspects such as growth rate, reproduction behaviour distribution pattern and feeding habits were studied from March 1997 to March 1998. Monthly sampling were carried out from the fishing grounds and estuaries of Jask area in the Oman Sea by small trawlers and beach seines gears. Initial growth 01 male was faster than female, with calculated K=l.5 for male and K=1.3 for female. Isometric growth trend was observed in both sexes. Sexual maturity attained within the first 12 months. Spawners were occured abundantly during post-winter, spring and beginning of summer. Postlarvae and sub-adults were found in the esturies with 25-100 mm length, and high densities were observed around the mangrove's roots. They spend at least 3 to 5 months of their life span in the esturies. Analysis of stomach contents revealed that this species is an omnivore with indicative contents of detritus, polychaetes, crustaceane, bivalves, algae and sand particles, with preponderance of vegetable constituents in the sub-adults and of detritus in adults.
    Keywords: Biology ; Penaeus Indicus ; Growth ; Spawning ; Feeding ; Oman Sea ; Hormozgan Province ; Jask area ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 43-52
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