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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Cloning and Nucleotide Sequence of Four tRNA Genes in Mitochondrial Genome of Thai Walking Catfish, Clarias macrocephalus G?nther) ผู้เขียน: ดร.ประดิษฐ์ แสงทอง, ผู้ช่วยศาสตราจารย์ , ดร.อำนวย จรด้วง, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe Hind III digested fragment of Thai walking catfish mitochondrial DNA was cloned and its nucleotide sequence was determined. This fragment, consisting of 668 bp, was composed of partial WANCY region and COI gene. The partial WANCY region was consisted of partial tRNATrp gene, complete tRNAAla, tRNAAsn, tRNACys, and tRNATyr genes, and origin of light strand replication (OL). These genes and non-coding sequence (OL) were the same in their organization as those found in other vertebrates. The partial nucleotide sequence of COI stared with GTG and its inferred amino acids were highly conserved as previously described in other fishes. Interestingly, the intergenic spacer between tRNACys and tRNATyr was ten nucleotides in length, which might be unique among Clariid species. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of 17 Alpha-Methyltestosterone on Growth, Survival and Sex Reversal of Thai Walking Catfish, Clarias macrocephalus ) ผู้เขียน:ดร.อุทัยรัตน์ ณ นคร, ศาสตราจารย์ ,  Rex A. Dunham, ประทักษ์ ตาบทิพย์วรรณ สื่อสิ่งพิมพ์:pdf AbstractFry of Clarias macrocephalus were fed at first feeding with water fleas (Moina sp.) immersed for 20 minutes in 200 ppm or 400 ppm MT for 15 days. The groups fed water flea (200 ppm MT) were fed a diet containing 30 mg MT and the groups fed water flea (400 ppm MT) were fed 60 mg MT, for the additional 15 or 45 days. Results indicated that administration of MT did not affect growth (P>0.05) at 33 days but retarded growth at 63 days of all treated groups. Growth of treated groups was increasingly suppressed with increased dose and duration of treatment. Administration of MT lowered survival rate at 33 days (P<0.05). Survival from day 33-63 was unaffected by the hormone application. Ovotestes were found in the groups treated with 30 and 60 mg MT for 60 days. In general, sex reversal to maleness was not accomplished, and with increasing dose and duration there appeared to be paradoxical feminization. Alternatively, MT may have prevented gonads of genetic males from differentiation or caused the formation of ovotestes in genetic females. |
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 ผลงานตีพิมพ์ในวารสารวิชาการGenetic components of growth traits of the hybrid between male North African catfish (Clarias gariepinus Burchell, 1822) and female bighead catfish (C. macrocephalus Gunther, 1864)ผู้แต่ง:Chaivichoo, P, Dr.Skorn Koonawootrittriron, Associate Professor , Dr.Satid Chatchaiphan, Assistant Professor, Srimai, W, Dr.Uthairat Na-Nakorn, Professor, วารสาร:  
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