测量并分析了沙塘鳢(Odontobutis obscurus(Temminck et Schlegel))的体重、体长、全长、体宽、体高、头长、眼间距、吻宽和尾柄高及其相互关系,除体长与体重的关系以模型y=ax^b拟合较好外,体长与其它长度指标的关系均以模型y=a+bx拟合...测量并分析了沙塘鳢(Odontobutis obscurus(Temminck et Schlegel))的体重、体长、全长、体宽、体高、头长、眼间距、吻宽和尾柄高及其相互关系,除体长与体重的关系以模型y=ax^b拟合较好外,体长与其它长度指标的关系均以模型y=a+bx拟合较好。随着体长的增加,体高/体长、眼间距/体长和吻宽/体长等指标均显著增加,这表明,随着沙塘鳢的生长,鱼类的体型一直在发生变化。展开更多
The hybrid between olive flounder Paralichthys olivaceus and stone flounder Kareius bicoloratus was produced by artificial insemination of olive flounder eggs with stone flounder sperm. Sinistral and dextral are two t...The hybrid between olive flounder Paralichthys olivaceus and stone flounder Kareius bicoloratus was produced by artificial insemination of olive flounder eggs with stone flounder sperm. Sinistral and dextral are two types of hybrid progeny after metamorphosis. Karyotypes of both hybrid flounders are the same as those of the two parental species. Of the 22 loci examined from 12 allozymes, 12 confirmed hybridization of the paternal and maternal loci in hybrids and no difference was found in allozyme patterns of sinistral and dextral hybrid fishes. RAPD patterns of these specimens were also studied with 38 primers selected from 104 tested. Among them, the PCR products of 30 primers showed hybridization of the paternal and maternal bands. Genetic variation between hybrids and their parental stocks was analyzed by RAPD using 10 of the above 38 primers. The average heterozygosity and genetic distance were calculated. The results suggested that the filial generation could inherit a little more genetic materials from paternal fish than that from maternal fish.展开更多
Drag forces acting on Schlegel’s black rockfish Sebastes schlegeli were studied. A new drag force transducer was designed and used to measure the water drag on Schlegel’s black rockfish in a vertical recirculating f...Drag forces acting on Schlegel’s black rockfish Sebastes schlegeli were studied. A new drag force transducer was designed and used to measure the water drag on Schlegel’s black rockfish in a vertical recirculating flume tank. Fourteen individuals were investigated, yielding two mean drag coefficients referred to the cross sectional area and volume 2/3 respectively at water velocities ranging from 0.3 to 1.0 m s -1 . The drag coefficients can be used for estimating the drag forces acting on Sebastes schlegeli in water.展开更多
文摘测量并分析了沙塘鳢(Odontobutis obscurus(Temminck et Schlegel))的体重、体长、全长、体宽、体高、头长、眼间距、吻宽和尾柄高及其相互关系,除体长与体重的关系以模型y=ax^b拟合较好外,体长与其它长度指标的关系均以模型y=a+bx拟合较好。随着体长的增加,体高/体长、眼间距/体长和吻宽/体长等指标均显著增加,这表明,随着沙塘鳢的生长,鱼类的体型一直在发生变化。
基金Supported by National Natural Science Foundation of China (No. 30571445)National High-Technology Research and Development Program (863 Program, No. 2006AA10A404)Project from the Ministry of Science and Technology of China (No. 2006DKA30470-017)
文摘The hybrid between olive flounder Paralichthys olivaceus and stone flounder Kareius bicoloratus was produced by artificial insemination of olive flounder eggs with stone flounder sperm. Sinistral and dextral are two types of hybrid progeny after metamorphosis. Karyotypes of both hybrid flounders are the same as those of the two parental species. Of the 22 loci examined from 12 allozymes, 12 confirmed hybridization of the paternal and maternal loci in hybrids and no difference was found in allozyme patterns of sinistral and dextral hybrid fishes. RAPD patterns of these specimens were also studied with 38 primers selected from 104 tested. Among them, the PCR products of 30 primers showed hybridization of the paternal and maternal bands. Genetic variation between hybrids and their parental stocks was analyzed by RAPD using 10 of the above 38 primers. The average heterozygosity and genetic distance were calculated. The results suggested that the filial generation could inherit a little more genetic materials from paternal fish than that from maternal fish.
基金supported by the National Hightech 863 Project(No.2001AA623030)the National Natural Science Foundation of China(No.30070593).
文摘Drag forces acting on Schlegel’s black rockfish Sebastes schlegeli were studied. A new drag force transducer was designed and used to measure the water drag on Schlegel’s black rockfish in a vertical recirculating flume tank. Fourteen individuals were investigated, yielding two mean drag coefficients referred to the cross sectional area and volume 2/3 respectively at water velocities ranging from 0.3 to 1.0 m s -1 . The drag coefficients can be used for estimating the drag forces acting on Sebastes schlegeli in water.
