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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.41, no.3, 2008³â, pp.301-310
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( Characteristics of Fish Compositions and Longitudinal Distribution in Yeongsan River Watershed ) |
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| º» ¿¬±¸´Â 2003$sim$2006³â±îÁö ¿µ»ê° ¼ö°è 22°³ ÁöÁ¡À» ´ë»óÀ¸·Î ¾îÁ¾µéÀÇ »ýÅÂÆ¯¼º ¹× Áö¸®Àû ºÐÆ÷¾ç»óÀ» ºÐ¼®Çϰí Çϱ¸µÏ ÃàÁ¶ Àü.ÈÄ ¾î·ù»óÀÇ º¯È¸¦ ºñ±³ Æò°¡ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼ äÁýµÈ ¾î·ù´Â ÃÑ 14°ú 44Á¾À¸·Î ³ªÅ¸³µ°í, ÁÖ¿ä ¿ìÁ¡Á¾Àº ÇǶó¹Ì, Å«³³Áö¸®, °¥°Ü´Ï, ºØ¾î µîÀ¸·Î ³ªÅ¸³µ´Ù. »ýÅÂÁöǥƯ¼º ºÐ¼®¿¡ µû¸£¸é, ³»¼ºÁ¾ ¹× Àâ½ÄÁ¾ÀÇ »ó´ëdzºÎµµ´Â °¢°¢ 41%, 68%·Î ³ô°Ô ³ªÅ¸³ª ÈÇÐÀû ¼öÁú¾ÇÈ ¹× ¹°¸®Àû ¼½ÄÁö ±³¶õ¿äÀÎÀÌ Á¸ÀçÇÏ´Â °ÍÀ¸·Î »ç·áµÇ¾ú´Ù. ¶ÇÇÑ, ¿À¿°¿øÀÇ ¿µÇâÀ» ¹ÞÁö ¾ÊÀº ÁöÁ¡(NPS)°ú ¿µÇâÀ» ¹ÞÀº ÁöÁ¡(PS)ÀÇ ºñ±³ ºÐ¼®¿¡ µû¸£¸é, Á¾°ú °³Ã¼¼ö°¡ ÃÖ´ë 70%±îÁö Â÷À̸¦ º¸¿© »ýÅÂ°è ±³¶õÀÌ ¶Ñ·ÇÇÏ°Ô ¹ß»ýÇÏ¿´À½À» ½Ã»çÇÏ¿´´Ù. ÇÏõÂ÷¼ö¿¡ µû¸¥ ¾îÁ¾ ¹× »ýÅÂÁöǥƯ¼º ºÐ¼®¿¡ µû¸£¸é, ´ëÁ¶±ºÁöÁ¡(RS)Àº ÇÏõÂ÷¼ö°¡ ³ô¾ÆÁú¼ö·Ï ÃÑ Á¾¼ö ¹× ÃÑ °³Ã¼¼ö°¡ Áõ°¡ÇÏ¿´°í, Á¶»çÁöÁ¡(SS)¿¡¼´Â °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´´Ù. ¶ÇÇÑ, ÇÏõÂ÷¼ö°¡ ³ô¾ÆÁú¼ö·Ï ¹Î°¨Á¾°ú Ãæ½Ä¼º ¾îÁ¾ÀÇ »ó´ëdzºÎµµ´Â °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´°í ³»¼ºÁ¾°ú Àâ½Ä¼º ¾îÁ¾ÀÇ »ó´ëdzºÎµµ´Â Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¿Ü·¡¾îÁ¾ÀÌ¸é¼ À°½ÄÁ¾ÀÎ ¹è½º´Â ¾îÁ¾±¸¼º ¹× ¿µ¾ç´Ü°è±¸Á¶¿¡ º¯È¸¦ °¡Á®¿Í ±Ã±ØÀûÀ¸·Î ¼ö»ýŰèÀÇ °Ç°¼ºÀ» ¾ÇȽÃŰ´Â ¿äÀÎÀ¸·Î ÀÛ¿ëÇÏ°Ô µÇ¾ú´Ù. ¿µ»ê° Çϱ¸µÏ °Ç¼³Àº Á¤Ã¼¼ö¿ªÀ» Áõ°¡½Ã۰í, ÇØ¼ö¿¡¼ ´ã¼öȵʿ¡ µû¶ó Á¤Ã¼¼ö¿ªÀ» ¼±È£ÇÏ´Â ¾îÁ¾ÀÎ ºØ¾î, À×¾î, Ä¡¸® µîÀÇ ÃâÇöºóµµ°¡ ³ô°Ô ³ªÅ¸³ª°Ô µÇ¾úÀ¸¸ç, ±â¼ö¿ª¿¡ ¼½ÄÇÏ´Â ¾îÁ¾°ú ȸÀ¯¼º ¾îÁ¾ÀÇ ÃâÇöºóµµ°¡ »ó´ëÀûÀ¸·Î °¨¼ÒÇÏ°Ô µÇ¾ú´Ù. ¿µ»ê° ¼ö°èÀÇ ¾î·ù»óÀº ¿Ü·¡¾îÁ¾ÀÇ µµÀÔ, ¹°¸®Àû ¼½Äȯ°æÀÇ ±³¶õ°ú ¿À¿°¿øÀÇ À¯ÀÔ µî¿¡ ÀÇÇÏ¿© ¾îÁ¾±¸¼º ¹× ¿µ¾ç´Ü°è±¸Á¶°¡ º¯ÇÏ¿´°í, ±Ã±ØÀûÀ¸·Î ¼ö»ýÅ °Ç°¼º¿¡ ¿µÇâÀ» ¹ÌÄ£ °ÍÀ¸·Î »ç·áµÇ¾ú´Ù. ÀÌ·¯ÇÑ º¯È¸¦ ¿¹Ãø °ü¸®Çϱâ À§ÇÏ¿© Àå±âÀûÀ̰í Áö¼ÓÀûÀÎ ¾î·ù ¸ð´ÏÅ͸µÀÌ ÇʼöÀûÀ¸·Î ¿ä±¸µÇ¸ç, ¿Ü·¡¾îÁ¾¿¡ ÀÇÇÑ ±³¶õ ¾ïÁ¦¿Í ¹°¸®Àû ¼½ÄÁöÀÇ º¹¿øÀÌ ÇÔ²² ÁøÇàµÇ¾î¾ß ÇÒ °ÍÀ¸·Î »ç·áµÇ¾ú´Ù. |
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| This study was to analyze characteristics of fish compositions and longitudinal distribution, based on trophic and tolerance guild at 22 sampling sites of Yeongsan River watershed during 2003$sim$2006, and also to compare before and after the estuary dam construction. The collected fishes, based on catch per unit effort (CPUE), were 44 species in the watershed and dominant fishes were Zacco platypus, Acheilognathus macropeterus, Zacco temminckii and Carassius auratus. According to comparative analysis of fish in the non polluted sites (NPS) vs. polluted sites (PS), the number of species and individuals was lower by 70% in the PS than the NPS, indicating ecological degradations by chemical pollutions or/and habitat modifications. The relative abundance of sensitive and insectivore species decreased as the stream order increases, while tolerant and omnivore species increased with the stream order. In this survey, largemouth bass (Micropterus salmoides), which is a top-carnivore and exotic species, may influence trophic guild system throughout active predations on endemic species, resulting in modifications of ecological functions. The construction of estuary dam on Yeongsan River in 1981 resulted in wider lacustrine zone and desalinated through limitation of seawater input. These physical changes have caused increases of lentic dwelling species and limited fish migrations (i.e., eel). Overall, fish fauna and composition analyses showed that the number of species and individuals in this water body may be reduced due to inputs of pollutants from the watershed, habitat modifications, and increases of exotic species (largemouth bass). For these reasons, effective lake management strategies are required for the ecosystem conservation. |
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| Ű¿öµå |
| Yeongsan River;fish fauna;species composition;ecological health; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.41, no.3, 2008³â, pp.301-310
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200833338919333)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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