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Á¦¸ñ : ±â»óÁ¶°Ç°ú ¹è¼³Áö Ư¼º¿¡ µû¸¥ ¼ö´Þ(Lutra lutra) ºÐº¯ÀÇ Ç¥¹éÇö»ó¿¡ °üÇÑ ¿¬±¸ ÀúÀÚ : ³ëÀº¿µ, ÇѼº¿ë, À¯Á¤Ä¥
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References

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¹è¼³ ÈÄ ½Ã°£ °æ°ú¿¡ ÀÇÇØ ³ªÅ¸³ª´Â ¼ö´Þ(Lutra l
utra) ºÐº¯ÀÇ Ç¥¹éÇö»óÀº ½Å¼±ÇÑ ºÐº¯(Fresh spraints)°ú ¿À·¡µÈ ºÐº¯(Old spraints)À» ¾Ë·ÁÁִ ôµµ·Î ÀÌ¿ëµÇ°í ÀÖ´Ù. ±âÁ¸ÀÇ ¿¬±¸µéÀº ºÐº¯ Ç¥¹éÇö»ó¿¡ ´ëÇØ ¿ÜÀû Ư¡¸¸À» ¾ð±ÞÇØ¿ÔÀ»»Ó, ºÐº¯ °£ ¹ß»ýÇϴ ǥ¹é·üÀÇ Â÷À̸¦ ¼³¸íÇÒ ¼ö ¾ø¾ú´Ù. º» ¿¬±¸´Â °ø±Ø·ü, ¿¬°æµµ °°Àº ¹è¼³Áö Ư¼º¿¡ ÀÇÇØ ¹ß»ýÇϴ¹̱â»ó(Micrometeorology) Â÷ÀÌ°¡ ºÐº¯ °£ Ç¥¹é·ü¿¡ Â÷À̸¦ À¯¹ßÇÒ °ÍÀÌ¶ó °¡Á¤Çß´Ù. ¹è¼³Áö Á¶°ÇÀº Á¡Åä, ¸ð·¡, ¹ÙÀ§,ÄÜÅ©¸®Æ®ÀÇ ³× °¡Áö À¯ÇüÀ¸·Î, Àϻ緮ÀÇ ¿µÇâÀ» º¸±â À§ÇØ ´Ù½Ã ¾çÁö¿Í À½Áö·Î ³ª´©¾ú´Ù. ¹è¼³Áö ¹Ì±â»óÀº ÁöÇ¥¸éÀDZâ¿Â°ú ½Àµµ ÃøÁ¤À» ÅëÇØ µµÃâÇß°í, °èÀýÀû º¯È­¸¦ °í·ÁÇϱâ À§ÇØ Àü °èÀý¿¡ °ÉÄ£ ÃøÁ¤ÀÌ ÀÌ·ç¾îÁ³´Ù. ¹è¼³Áö ±â»ó¿ä¼ÒÀÇ »ó°ü°ü°è ºÐ¼®À» ÅëÇØ ¾çÁö¿¡¼­ ¹è¼³Áö À¯Çü¿¡ µû¶ó ¹Ì±â»ó¿¡ Â÷ÀÌ°¡ ¹ß»ýÇÏ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. ¹è¼³Áö ¹Ì±â»óÂ÷ÀÌ°¡ ºÐº¯ Ç¥¹éÇö»ó¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ºÐ¼®ÇÑ °á°ú ¾çÁöÀÇ ¹ÙÀ§¿Í ÄÜÅ©¸®Æ® ¹è¼³Áö¿¡¼­ ³ôÀº ºÐº¯ Ç¥¹é·üÀÌ ³ªÅ¸³µÀ¸¸ç, ƯÈ÷ ¿©¸§¿¡´Â ¾çÁöÀÇ Á¡Åä ¹è¼³Áö¿¡¼­ ºÐº¯ Ç¥¹é·üÀÌ °¡Àå ³ô°Ô ³ªÅ¸³ª´Â Ư¡À» º¸¿´´Ù(63.4 ¡¾ 7.6%). Àü °èÀý¿¡°ÉÃÄ Ç¥¹é·üÀÌ °¡Àå ³·Àº ¹è¼³Áö´Â ¸ð·¡ÀÎ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. °¢ ¹è¼³ÁöÀÇ ºÐº¯ Ç¥¹é·üÀº °èÀý°ú ÇÞºûÀÇ À¯¹«¿¡ µû¶óÂ÷ÀÌ°¡ ¹ß»ýÇß°í, ¹è¼³Áö Ư¼º¿¡ ÀÇÇÑ ¿­Àüµµµµ Â÷ÀÌ°¡ ¹è¼³Áö ±â¿Â Â÷À̸¦ À¯¹ßÇÔÀ¸·Î½á, ºÐº¯ Ç¥¹é·ü¿¡ Â÷ÀÌ°¡ ¹ß»ýÇÔÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. µû¶ó¼­ º» ¿¬±¸´Â ºÐº¯À» °£Á¢ÈçÀû(Indirect sign)À¸·Î ÀÌ¿ëÇÏ´Â ¼ö´Þ »ýÅÂÁ¶»ç¿¡ À־, ºÐº¯ Ç¥¹éÇö»ó¿¡ ´ëÇÑ ±âÁ¸ÀÇ ¿ÜÀû Æò°¡´Â °èÀý, ¹è¼³Áö Ư¼º ¹× ÇÞºûÀÇ À¯¹«¸¦ ÇÔ²² °í·ÁÇØ¾ß ÇÑ´Ù´Â °ÍÀ» º¸¿©ÁØ´Ù.

The bleaching phenomenon of o
tter spraints is indicates that the age of spraints (fresh or old spraints). As previousstudies on the old otter faeces (spraint) have focused only on the external changes of spraints, it has been difficult toexplain the difference of the decomposition rates among old spraints. We hypothesized that the micrometeorologydifference caused by various characteristics of sprainting sites such as porosity and consistency of soil could affect theextent of the decomposition rate, the solar bleaching phenomenon of spraints used as a measure of the patterns of oldspraints. Sprainting sites were classified into four types (Clay, Sand, Rock and Concrete spot) and each type wasdivided into two groups according to the sunlight condition (Sunny site and Shady site) to measure the effect of solarradiation. Micrometeorology of the sites were evaluated by measuring temperatures and humidities of the sites duringthe whole season. The variations in micrometeorology of the sunny sites according to the sprainting site types wereexamined with correlation analyses between the factors of micrometeorology. The analyses on the bleachingphenomenon of the spraints by micrometeorology showed that the highest rate of bleaching was found at the ¡®Rockspot¡¯ and ¡®Concrete spot¡¯ of the sunny site and especially in summer, the highest rate of bleaching (63.4 ¡¾ 7.6%) wasfound at the ¡®Clay spot¡¯ of the sunny sites. The lowest rate of bleaching was found at the ¡®Sand spot¡¯ of the sunnysites. The above findings show that the difference in bleaching rates among sprainting sites was due to the seasonal orsunny condition. In addition, we found that the differences in thermal conductivity among sprainting sitecharacteristics have resulted in different sprainting site temperature which have affected the rate of bleaching ofspraints. In conclusion, this study suggests that studies of otters on their population size and home ranges usingspraints as an indirect sign, should consider the effects of sprainting site characteristics and weather conditions.   (ÀÌÇÏ »ý·«)

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