Stock assessment of the bony fishes in Iranian coastal waters of the Caspian Sea (2005-2007)

• Main Authors: Darya Nabard, Gholam Reza, A`bd Ol-Maleki, Shahram, Kor, Davud, Bandani, Gholam A`li, Taqavi, Amin Ol-Lah, Kay Maram, Farhad, Par Afkandeh, Farrokh, Janbaz, A`li Asghar, Afzei, Mohammad A`li, Moqim, Mahdi, Salmani Jeludar, A`li, Ramazani, Hamid, Ghani Nezhad, Davud, Pur Gholami Moqaddam, Akbar, Khedmati Bazkiyaei, Kambiz, Nahrur, Reza, Larijani, Mohammad
• Format: Publication
• Language: Persian
• Published: Tehran (Iran) Fisheries Research Institute of Iran 2009
• Subjects: AGUAS COSTERAS; AGUAS INTERIORES; AMBIENTE ACUATICO; AQUATIC ENVIRONMENT; BIOMASA; BIOMASS; BIOMASSE; BONY FISHES; CASPIAN SEA; Caspian Sea Ecology Research Center; COASTAL FISHERIES; COASTAL WATERS; EAUX CONTINENTALES; EAUX COTIERES; EVALUACION DE POBLACIONES ICTICAS; EVALUATION DES STOCKS; FISHERY RESOURCES; Gilan ( Province ); Golestan ( Province ); INLAND WATERS; Inland Waters Aquaculture Researech Centere; Inland Waters Aquatics Stocks Research Centere; IRAN ISLAMIC REPUBLIC; IRAN REPUBLICA ISLAMICA; IRAN REPUBLIQUE ISLAMIQUE; Kuttum; LISA; MAR CASPIO; Mazandaran ( Province ); MER CASPIENNE; MILIEU AQUATIQUE; MUGE; MULLETS; PECES OSEOS; PECHE COTIERE; PESCA COSTERA; POISSON OSSEUX; RECURSOS PESQUEROS; RESSOURCE HALIEUTIQUE; STOCK ASSESSMENT

Exploitation of bony fishes resources started on 12 October 2005 and finished on 9 April 2006 in 2005-2006. 142 beach seines caught about 14333.4 tones of bony fishes by 47101 hauling. The total catch was estimated 21844.7 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 97 percent of total catch. Length classes 39-40, 31-32 and 40-41 cm predominated for kuttum, golden grey mullet and common carp, respectively. Age groups 3 to 5 year comprised 84.2, 74.8 and 83.7 percent for Kuttum, golden grey mullet and common carp, respectively and age group 4 year was dominant with 42.0, 35.9 and 43.0 percent, respectively. K value and L calculated 0.26 (/year) and 58.3 cm for Kuttum and 0.15 (/year) and 61.5 cm for golden grey mullet, respectively. The total biomass and MSY estimated about 24733.7 and 8550.4 tones for kuttum and about 16948.0 and 4999.0 tones for golden grey mullet, respectively. Exploitation rate (E) calculated 0.71 and 0.70 for Kuttum and golden grey mullet, respectively. In 2006-2007, the exploitation of bony fishes resources started on 12 October 2006 and finished on 7 April 2007 in 2006-2007. 134 beach seines caught about 14120.0 tones of bony fishes by 48470 hauling. The total catch was estimated 23801.8 tones (Includes illegal fishery). Kutum, mullets and common carp comprised more than 98.5 percent of total catch. Length classes 39-40 and 38-39 cm predominated for kuttum and common carp, respectively and length classes 27-28 and 29-30 cm predominated for golden grey mullet. Age groups 3 to 5 year comprised 80.2 and 71.8 percent for kuttum and golden grey mullet, respectively and age groups 4 to 6 year comprised 71.8 percent for common carp. Age group 3, 4 and 5 year was dominant with 35.5, 32.1 and 27.1 percent for kuttum, golden grey mullet and common carp respectively. K value and L calculated 0.27 (/year) and 60.7 cm for Kuttum, 0.2 (/year) and 58.4 cm for golden grey mullet and 0.19 (/year) and 66.7 cm for common carp, respectively. The total biomass and MSY estimated about 46654.9 and 14801.4 tones for Kuttum, about 19549.0 and 5748.4 tones for golden grey mullet and about 10584.3 and 2186.0 tones for common carp, respectively. Exploitation rate (E) calculated 0.69, 0.53 and 0.52 for kuttum, golden grey mullet and common carp, respectively.