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Articles by Fazil Sen
Total Records ( 5 ) for Fazil Sen
  Mahmut Elp and Fazil Sen
  This study was carried out between March 2007 and April 2008 in Karasu Stream. Total 472 individual sampled by hand nets and electroshock. Length, weight, sex and gonad weight were determined. Age was determined by scales. The age, length and weights of samples varied from I-VI, 4.0-37.5 cm and 0.7-676.2 g, respectively. It was determined that the most samples were in 12.0-13.9 cm (16.1%) and 0-24.9 g (21.2%) group. Condition factor, length-weight, age-length, age-weight equations, male:female ration were calculated as 1.452, W = 0.0129xL3.039, Lt = 52.58x[1-e-0.145x (t+0.464)], Wt = 2188.21x[1-e-0.145x (t+0.464)]3.039, 2.603, 1:0.85, respectively. Sexual maturity size was determined as in males 11 cm, in females 23 cm. In the reproduction, period reproduction nods were seen on head and anal fins of males. Relative fecundity number calculated as 44494 number kg-1 fish and age diameter measured as 2.011 mm.
  Fazil Sen and Ferzende Saygin
  In this study, the age, growth and reproduction of chub (L. cephalus) population, living in Karasu Stream, was determined. Total 404 chub have sampled and investigated between April 2005 and October 2006. The ages, lengths and weights of individuals varied from 1-7 year, 7.3-40.5 cm and 4.8-1002.5 g, respectively. Length-weight relationship and Von Bertalanffy Growth Equations were calculated as W = 0.00844L3.1558; as Lt = 60.75(1-e-0.088(t+0.333)) and as Wt = 3588.04(1-e-0.088(t+0.333))3.1558, respectively. The mean condition factor was defined as 1.2970.010. It was established that females and males attained sexual maturity when they reached to 13 and 14 cm in length and third age, respectively and spawning was observed between May and July. The male:female ratio was calculated as 1.45:1. In the population, minimum catching size should be applied as IV age, 18 cm fork length and 70 g total weight.
  Fazil Sen , Mahmut Elp and Ertugrul Kankaya
  This study was carried out in Zernek Dam Lake, Van, Turkey. In this study, 586 individuals have sampled and investigated between June 2006 and October 2007. The ages, lengths and weights of individuals varied from 1-7 years, 4.0-41.0 cm and 0.7-1060.4 g, respectively. Age-length and length-weight relationships were calculated as Lt = 48.927(1-e -0.2038(t+0.2028)), as W = 0.0137L2.992, respectively. The mean condition factor was defined as 1.3390.005. The male: female ratio was estimated as 1:1.72. It was established that females and males attained sexual maturity when they reached to 23 and 15 cm in length, 180 and 60 g and 4th and 2nd age, respectively, spawning was observed between beginning of June and 2nd week of July. It may be suggested that fishing should be forbidden between 1 May and 1 August and minimum catching size must be 5th age, 26 cm fork length and 220 g total weight.
  Mahmut Elp , Fazil Sen and Osman Cetinkaya
  This study was carried out to determine some biological parameters of carp populations introduced to the Kockopru Dam Lake on the Zilan River in Lake Van Basin and conducted between December 1999 and August 2001. Sampling was carried out monthly using hand nets and trammel nets. It was determined that carp become a sustainable population and is caught by fishermen. The maximum age was determined as VII; fork length as 61.7 cm and weight as 6002.6 g. Length-weight relationship was estimated as log W = -1.402+2.847 log L and age-length relationship was determined as Lt = 84.070 (1-e-0.126(t+0.801)). It was also determined that male female ratio was 1:0.94 and maturity size was determined as more than 45 cm for female. Reproduction period was observed in June. It was also observed that commercial fishing could be a big threat for the future of the Kockopru Dam Lake population because of undersized catch.
  Mahmut Elp , Osman Cetinkaya , Ertu-rul Kankaya , Fazil Sen and Guler Unal
  This study was carried out to determine some growth parameters of barbel populations living in the KoCkoprU Dam Lake and its inlets between April 2000 and October 2001. The barbel species are shown a widespread distribution in Turkey. The species is native in study area, has economic value and is fished local fishermen. A total of 324 individuals were sampled. The maximum age of individuals was determined as VII, fork length was 33.8 cm and weight was 428.0 g. Females were found larger than males in size. Condition factor values were determined as 1.210 ± 0.009 for males, 1.266 ± 0.017 for females and 1.293 ± 0.030 for juveniles. In overall, condition factor of females was higher than males. Length-weight relationship was determined for whole samples as logW = -1.841+2.934 logL.
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