Tinca tinca(L.,1758)grafted into Turkish inland waters in 1970 has shown constantly widening distribution since then.It is a locally consumed species with limited economic value.The elucidation of length-weigh relatio...Tinca tinca(L.,1758)grafted into Turkish inland waters in 1970 has shown constantly widening distribution since then.It is a locally consumed species with limited economic value.The elucidation of length-weigh relation,condition factor and biological features are of great importance in the determination of the effects of different habitats on particular species.T.tinca is regarded as an important species to be monitored among the fish taxa.This study was intended to study some biological aspects of T.tinca population in Asartepe Reservoir and to compare the results with the available information.The study has been carried out on 131 T.tinca species caught in Asartepe Reservoir between the periods of March 2015-February 2016.The morphometric and meristic properties and the ratio of some diagnostic features to the standard length were elucidated.The highest and the lowest variations observed among the morphometric features were in body length with 21.35%and eye diameter with 8.31%.The corresponding values for the meristic features were pectoral fin unbranched rays with 30.09%and number of vertebrae with 2.68%.The highest percentage relative to the standard length was found in predorsal distance with 56.95%.The age distribution of T.tinca population was between the ranges of 1-9 years of age.The average weight and length were found to be 520.58±207.84 g(103-1,302 g)and 308.68±41.38 mm(190-429 mm).The parameters of a and b of length and weight relation and the correlation coefficient were found to be 0.9692,3.0522 and 1.6807±0.1264(1.4199-2.0368),respectively.The results indicate that the growth level of T.tinca population is satisfactory.展开更多
Gynogenesis is thought to be a useful method to generate fully inbred line and to initiate monosex culture in teleost fish. This article presents results of a study of gynogenesis of tench, Tinca tinca L. from Eltrix ...Gynogenesis is thought to be a useful method to generate fully inbred line and to initiate monosex culture in teleost fish. This article presents results of a study of gynogenesis of tench, Tinca tinca L. from Eltrix River of Xinjiang, China, induced by the common carp (Cyprinus carpio) sperm inactivated with UV irradiation. When cold shocking method was used to prevent extrusion of the second polar body in order to produce gynogenetic diploids, the optimum treated parameters were screened as cold shocking for 20min at 4℃, 5min after insemination. On this condition, 10.23% of the treated eggs survived at feeding stage. A comparative study between the gynogenesis and their parents was made by RAPD technique. 82 random primers of 10 nucleotide long sequence were used in RAPD analysis. The results showed that each primer gives (3-12) fragments for each sample with the fragment length (330-2 460) bp, and the genetic similarity between gynogenesis and their mother was 97.4%, while the genetic similarity between gynogenesis and their father was 27.4%, and there were no bands only shared by gynogenesis and their father, the common carp. It revealed that the chromosome of their father, the common carp, did not penetrate into the construction of gynogenetic tench.展开更多
文摘Tinca tinca(L.,1758)grafted into Turkish inland waters in 1970 has shown constantly widening distribution since then.It is a locally consumed species with limited economic value.The elucidation of length-weigh relation,condition factor and biological features are of great importance in the determination of the effects of different habitats on particular species.T.tinca is regarded as an important species to be monitored among the fish taxa.This study was intended to study some biological aspects of T.tinca population in Asartepe Reservoir and to compare the results with the available information.The study has been carried out on 131 T.tinca species caught in Asartepe Reservoir between the periods of March 2015-February 2016.The morphometric and meristic properties and the ratio of some diagnostic features to the standard length were elucidated.The highest and the lowest variations observed among the morphometric features were in body length with 21.35%and eye diameter with 8.31%.The corresponding values for the meristic features were pectoral fin unbranched rays with 30.09%and number of vertebrae with 2.68%.The highest percentage relative to the standard length was found in predorsal distance with 56.95%.The age distribution of T.tinca population was between the ranges of 1-9 years of age.The average weight and length were found to be 520.58±207.84 g(103-1,302 g)and 308.68±41.38 mm(190-429 mm).The parameters of a and b of length and weight relation and the correlation coefficient were found to be 0.9692,3.0522 and 1.6807±0.1264(1.4199-2.0368),respectively.The results indicate that the growth level of T.tinca population is satisfactory.
文摘Gynogenesis is thought to be a useful method to generate fully inbred line and to initiate monosex culture in teleost fish. This article presents results of a study of gynogenesis of tench, Tinca tinca L. from Eltrix River of Xinjiang, China, induced by the common carp (Cyprinus carpio) sperm inactivated with UV irradiation. When cold shocking method was used to prevent extrusion of the second polar body in order to produce gynogenetic diploids, the optimum treated parameters were screened as cold shocking for 20min at 4℃, 5min after insemination. On this condition, 10.23% of the treated eggs survived at feeding stage. A comparative study between the gynogenesis and their parents was made by RAPD technique. 82 random primers of 10 nucleotide long sequence were used in RAPD analysis. The results showed that each primer gives (3-12) fragments for each sample with the fragment length (330-2 460) bp, and the genetic similarity between gynogenesis and their mother was 97.4%, while the genetic similarity between gynogenesis and their father was 27.4%, and there were no bands only shared by gynogenesis and their father, the common carp. It revealed that the chromosome of their father, the common carp, did not penetrate into the construction of gynogenetic tench.
