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Volume 49 (2000)
- Issue 4 Pages 167-
- Issue 3 Pages 107-
- Issue 2 Pages 67-
- Issue 1 Pages 1-
Predecessor
Volume 49, Issue 4
Displaying 1-3 of 3 articles from this issue
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Dharshani MAHAULPATHA, Tharaka MAHAULPATHA, Kaneyuki NAKANE, Tadashi F ...2000 Volume 49 Issue 4 Pages 167-173,189
Published: December 25, 2000
Released on J-STAGE: September 28, 2007
JOURNAL FREE ACCESSEffects of human disturbances on the distribution of wintering waterfowl were studied in 64 irrigation ponds in the Saijo basin, western Japan, during 1998-99. Thirteen waterfowl species were recorded in 27 ponds. 100% of the waterfowl were distributed in ponds located in residential areas in 1998. Small number of the residential species, the Spot-billed Duck (Anas poecilorhyncha), used a single pond in forest in 1999. Waterfowl in residential ponds were regularly disturbed by natural and human disturbances except for hunting. Pedestrians, anglers and bird watchers caused the highest number of disturbances in both years. We suggest that waterfowl are capable of habituating to frequent and regular non hunting disturbances, which helped them to occupy the ponds in residential areas. Hunting was the most critical factor on the distribution of waterfowl in Saijo basin. Potential risk of shooting caused waterfowl to forgo using the ponds in forests. In addition to hunting, construction work and dry out of ponds caused waterfowl to abandon ponds.View full abstractDownload PDF (7490K) -
Masanao HONDA, Satoshi YAMAGISHI2000 Volume 49 Issue 4 Pages 175-184,190
Published: December 25, 2000
Released on J-STAGE: September 28, 2007
JOURNAL FREE ACCESSPortions of mitochondrially encoded 12S and 16S rRNA genes were sequenced from 15 Oscine Passerine families in order to infer preliminary interfamilial relationships among the oscines. Our results, derived from combined sequences (881 base positions), suggest that the Oscines are comprised of at least three distinct lineages. Our results do not support the phylogenetic hypothesis based on DNA-DNA hybridization data. Furthermore, our data on inter-familial relationships, for example the wide separation of the Paridae and Sittidae, also contradict the previous relevant hypotheses based on morphology.View full abstractDownload PDF (9236K) -
Kaoru FUJITA2000 Volume 49 Issue 4 Pages 185-187
Published: December 25, 2000
Released on J-STAGE: September 28, 2007
JOURNAL FREE ACCESS
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