مقايسه تنوع مورفولوژيكي جمعيت هاي ماهي Garra rufa در ايران

چكيده انگليسي :

Comparison of Morphological Diversity of Garra rufa Heckel 1843 Populations in Iran Ali Nezameslami a nezameslami@gmail com Date of Submission 2011 03 06 Department of Natural Resources Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor Dr Yazdan Keivany keivany@cc iut ac ir Abstract Garra a cyprinid genus is found throughout Africa to southeastern Asia This genus contains 103 species among which four species including Garra rufa Heckle 1843 G rossica Nikol skii 1900 G persica Berg 1913 and G varabilis Heckle 1843 were reported from Iran In this study 485 specimen of G rufa from 28 population from six basins including Maharloo Karkheh Karun Tigris Bushehr and Hormuz basins were fixed in 10 formalin and transferred to the fishery laboratory of the Isfahan University of Technology for Ichthyological investigations A few live individuals were also transported to the laboratory for Karyological studies 28 morphometric 25 morphometric proportion and 10 meristic traits were examined Different mean comparison methods parametric and non parametric and Principal Component Analysis PCA were used for statistical analyses In comparison of the six afore mentioned basins for the morphometric proportions Kruskal Wallis H non parametric test and for all the other traits analysis of variance ANOVA but the ratios dorsal fin base standard length and pectoral fin standard length showed significant differences P 0 05 The result of KMO 0 65 and Bartlett P 0 05 tests confirmed the suitability of the data proportions for factorial analysis Based on the correlation matrix of the studied traits 8 factors were extracted with total variance of 71 25 having special values more than 1 Plotting of the first factor against the second one showed high overlaps but partly segregated Bushehr basin from other basins To compare meristic traits number of scales above and below the lateral line dorsal anal pectoral pelvic and caudal fin rays predorsal and circum caudal peduncle scales number of vertebra and pharyngeal teeth were used Except the number of vertebra caudal fin rays and pharyngeal teeth all other traits were significantly different KMO 0 79 and Bartlett P 0 05 tests confirmed the suitability of meristic traits for factor analysis Based on correlation matrix of meristic traits the number of three factors with total variance of 51 78 and Eigenvalues more than 1 were extracted Plotting the first factor against the second one partly segregated Bushehr basin from other basins but other basins are highly overlaped The number of chromosomes in G rufa obtained as 2n 48 by counting 50 metaphas plates In order to prepare karyotype from the best metaphase plates pictures were taken and chromosomes short and long arm sizes arms ratio chromosomes relative lengh total chromosome length and centromeric indices were calculated Choromosome formulae was obtained as 34 Metasentric 12 submetacenric and 2 acrotelocenric and number of chromosome arms as NF 94 Based on the observed differences Bushehr Hormuz Maharloo populations on one hand and Karun Karkheh and Tigris populations on the other hand were closer to each other Key words Morphology G rufa Morphometric traits Meristic traits Karyology

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مقايسه تنوع مورفولوژيكي جمعيت هاي ماهي Garra rufa در ايران

ريخت شناسي , صفات اندازشي , صفات شمارشي , كاريولوژي