03750cas|a2200433 i 4500 20260818084958.0 230399s1994 th uzm rtt 00| a1eng d .b10168825 AIT Thesis no. EV-94-21 Metta Penpolcharoen Contaminants in eggs of two species of waterfowl from the Songkhla Lake Basin Bangkok : Asian Institute of Technology, 1994 49, [26] leaves Thesis ; no. EV-94-21 A thesis submitted in partial fulfilment of the requirement for the degree of Master of Science, School of Environment, Resources & Development Thesis (M.Sc.) - Asian Institute of Technology, 1994 This study was performed in order to establish the present contamination in the eggs of the waterfowl, the Little Grebe (Podiceps ruficollis) and the Yellow Bittern (Ixobrychus sinensis), situated in the Songkhla Lake Basin (SLB) in Southern Thailand in 1993. These species were selected as representative resident birds, integrating the residual levels in the studied area. The birds are distributed all over the Southeast Asia and can, therefore, serve for comparative studies as time trend monitoring and regional distribution of contaminant in more contaminated areas. Twenty-five eggs from seven nests of the Little Grebe and three nests from the Yellow Bittern were analyzed individually for persistent organochlorine residues which included aldrin, dieldrin, cis- and trans-chlordane, heptachlor, lindane, 2,4'-DDE, 2,4'-DDT, 4,4'-DDE, 4,4'-DDD, 4,4'-DDT, and seven chlorinated biphenyls. The results showed that 4,4'-DDE had the highest concentration in both birds with a range of 170.12-4918.00 æ.g/ kg fat (16.17-470.21 æ.g/kg fresh weight) in the Little Grebe, and 952.01-2071.16 æ.g/kg fat (40.60-111.02 æ.g/kg fresh weight) in the Yellow Bittern. However, the results were in general at low levels compared to other species in other reports. A literature reviews of organochlorine compounds in bird-eggs was conducted but did not reveal any publications on the investigated species or related birds. The results showed that the SLB is well suited as a baseline, which can serve as a background to more contaminated areas, and for future time trend studies. Waterfowl Songkhla Lake Basin Reutergardh, Lars Bertil, Chairperson Suselo, Tri Binarko, Examination Committee Phillips, Michael John, Examination Committee Swedish International Development Authority (SIDA), Scholarship Donor Asian Institute of Technology. Thesis ; no. EV-94-21 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15785 .b10168825 mnait x 250327 2 951012 m a x 0 mnait mnait mnarc mnarc 20 40 Barcode : 30050003047882 CREATED : 1994-05-16 RECORD # : i10200393 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050004965892 CREATED : 1994-05-16 RECORD # : i1020040x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160055397 CREATED : 2016-11-05 RECORD # : i12975497 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121001522 CREATED : 2020-04-11 RECORD # : i13307848 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 22646 22646 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-94-21 30050003047882 2026-08-18 08:49:58 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-94-21 30050004965892 2026-08-18 08:49:58 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. EV-94-21 30050160055397 2026-08-18 08:49:58 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 50.00 0 AIT Thesis no. EV-94-21 30050121001522 2026-08-18 08:49:58 3 2026-08-18 20