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dc.contributor.authorValinassab, Tooraj
dc.contributor.authorKashi, M.
dc.contributor.authorSkandari, Gh.
dc.contributor.authorMayahi, Y.
dc.coverage.spatialIranen_US
dc.coverage.spatialKhouzestan provinceen_US
dc.coverage.spatialBahrekanen_US
dc.date.accessioned2018-07-03T12:42:58Z
dc.date.available2018-07-03T12:42:58Z
dc.date.issued2009
dc.identifier.urihttp://hdl.handle.net/1834/13107
dc.description.abstractThe biological aspects of Sepia pharaonis was studied during years 2006-07. The studied area restricted to the Bahrekan in Khouzestan province covering the depths of 2 up to 25m. The sampling methods were gillnet and bottom trawl. A total of 310 specimens collected, of which there wasn’t found any cuttlefish in the study area from July to October (5 months). The collected samples were transferred to the laboratory ashore for further biological measurements consist of: Mantle length, Body weight, sex determination. Gonado-Somatic Index, and determination of Spermatophoric Index, Spawning season, Food preference, Maturity stages and chemical analysis for food value determination. The results showed that the overall sex ratio is about M:F= 2:1 with percentage of 67.41% for males and 32.50% for females. Males are significantly bigger than females with average mantle length (ML) of 233.3 and 269.3 mm for female and male, respectively; with body weight of 1102.3 and 1450.6 g. The mantle length body weight relationship was found W=0.001 ML 2.540 (R2= 0.92) Female as: W= 0.0015 ML 4797 (R2= 0.93) male From point of feeding, the food preferences results indicated that fish is considered as main food, crabs as minor food and other marine organisms such as bivalvia and gastropods as random food. The highest vacuity Index (CV) and empty stomachs was determined for March-April and the lowest value was is December. Also, the maximum GSI was estimated for March-April months in which showing coherrances with the lowest food preference. The maximum spermatophoricfilaments were 856 and 45 for male pharaoh cuttlefish with mantle length of 300 and 185 mm, and on the other hand this values for fecundity were estimated 1589 and 53 for female specimens with 254 and 198 mm mantle length. The spawning season occurs in April- March in which accompany with migration of pharaoh cuttlefish towards shallow waters. The fishing season would be in this period in w.en_US
dc.description.sponsorshipIranian Fisheries Science Research Instituteen_US
dc.language.isofaen_US
dc.publisherIranian Fisheries Science Research Instituteen_US
dc.relation.ispartofseries88.849;
dc.subject.otherBiologicalen_US
dc.subject.otherChemicalen_US
dc.titleBiological aspects of Sepia pharaonis in the Bahrekan waters (NW Persian Gulf)en_US
dc.typeReporten_US
dc.description.statusPublisheden_US
dc.format.pages85pp.en_US
dc.publisher.placeTehran, Iranen_US
dc.subject.asfaSepia pharaonisen_US
dc.subject.asfaGillneten_US
dc.subject.asfaSamplingen_US
dc.subject.asfaSpecimensen_US
dc.subject.asfaWeighten_US
dc.subject.asfaSexen_US
dc.subject.asfaGonado-somatic indexen_US
dc.subject.asfaSpawningen_US
dc.subject.asfaMaturityen_US
dc.subject.asfaFemaleen_US
dc.subject.asfaMaleen_US
dc.subject.asfaBivalviaen_US
dc.subject.asfaGastropodsen_US
dc.type.refereedRefereeden_US
refterms.dateFOA2021-01-30T18:48:33Z


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