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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.38, no.4, 2005³â, pp.482-493
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¿ì¸®³ª¶óÀÇ ¼ö°è¿¡¼ ¾î·ùäÁý È¿À²¼ºÀ» À§ÇÑ Àü±âÃæ°Ý±âÀÇ µµÀÔ
( Introduction of an Electrofishing Technique for Assessments of Fish Assemblages to Korean Watersheds ) |
| Ȳ¼øÁø;¹è´ë¿;ÀÌÀ翬;±èÀÚÇö;¾È±¤±¹; °Ç±¹´ëÇб³ ȯ°æ°úÇаú;Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;
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| º» ¿¬±¸ÀÇ ¸ñÀûÀº 2005³â 6-9¿ù±îÁö 38°³ Á¶»çÁöÁ¡À» ´ë»óÀ¸·Î ÇÏ¿© äÁýµÈ ¾î·ùÀÇ Á¾ ¼ö ¹× °³Ã¼ ¼ö dzºÎµµ¿¡ ´ë¶õ ÀüÅëÀû äÁý¹æ¹ý (ÁÖ·Î, Åõ¸Á ¹× Á·´ë ÀÌ¿ë)¹× Àü±âÃæ°Ý±â¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀÇ Á¶»ç È¿À²¼ºÀ» Æò°¡ÇÏ´Â °ÍÀ̾ú´Ù. äÁýµµ±¸´Â Àü±âÃæ°Ý±â¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ý (EM), ÀüÅëÀûÀÎ Á¶»ç¹ý (CM) ¹× ÀÌ µÎ °¡Áö ¹æ¹ýÀ» Á¶ÇÕÇÏ´Â ±â¹ý (CT)ÀÇ 3°¡Áö·Î ±¸ºÐÇÏ¿© Åë°èÀû À¯ÀǼº Â÷À̸¦ ºñ±³ ${cdot}$ °ËÅäÇÏ¿´´Ù. CM±â¹ý°ú EM±â¹ý»çÀÌÀÇ ¾îÁ¾ ±¸¼ºµµ¿¡ ÀÖ¾î¼ ¶Ñ·ÇÇÑ Â÷ÀÌ´Â ¹Ì²Ù¶óÁö ¹× ÂüÁ¾°³¿Í °°Àº Àú¼¾îÁ¾ (Benthic species) ¹× µ¹·Î µÈ ÇÏ»óÀ» ¼±È£ÇÏ´Â ²©Áö¿Í °°Àº Á¾¿¡¼ ³ªÅ¸³µ´Ù. ÀÌ·±Á¾µéÀÇ ÃâÇöºóµµ´Â CM±â¹ý º¸´Ù´Â EM±â¹ý¿¡ ÀÇÇØ Åë°èÀû À¯ÀǼºÀÌ ³ô°Ô ³ªÅ¸³ª ±âÁ¸ÀÇ Á¶»ç±â¹ýÀ» ±×´ë·Î ÀÌ¿ëÇÒ °æ¿ì Àú¼¼º ¾î·ù ȤÀº µ¹À» ¼±È£ÇÏ´Â Á¾ (Lithophilic species)ÀÇ Ç³ºÎµµ »êÁ¤½Ã °ú¼ÒÆò°¡µÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÇÑÆí, ÇǶó¹Ì¿Í °¥°Ü´Ï °°Àº ¼öÃþÁ¾(Water column species)Àº CM±â¹ý ÀÌ¿ë ½Ã °³Ã¼ ¼ö Áõ°¡°¡ ¶Ñ·ÇÇÏ¿© ÀÌ·± Á¾·ùÀÇ °³Ã¼±ºÀº °ú´ëÆò°¡ µÉ ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Ãʰõ, À¯±¸Ãµ, ´ëÀüõ ¹× °©Ãµ ¼ö°èÀÇ Åë°èÀû t-°ËÁ¤ °á°ú¿¡ µû¸£¸é, ÀÌµé ¸ðµç ÇÏõ¿¡¼ Á¾ ¼ö ¹× °³Ã¼ ¼ö´Â CM±â¹ýº¸´Ù´Â CT±â¹ý¿¡ ÀÇÇÏ¿© Åë°èÀûÀ¸·Î ³ô°Ô ³ªÅ¸³µ´Ù (t °ª =2.806-6.896, p °ª<0.05, n = 5-14). ¸¶Âù°¡Áö·Î °èÀýº° Åë°è ºÐ¼®¿¡¼µµ µÎ °¡Áö ±â¹ý »çÀÌ¿¡ Åë°èÀû À¯ÀǼºÀÌ Å©°Ô ³ªÅ¸³µ´Ù (p °ª< 0.001,n = 10-24). ÀÌ·¯ÇÑ ¿¬±¸ °á°ú´Â Àü±âÃæ°Ý±â¸¦ ÀÌ¿ëÇÑ ¾î·ùäÁý¹æ¹ýÀÌ ±âÁ¸ÀÇ ¹æ¹ý¿¡ Ãß°¡µÇÁö ¾Ê´Â´Ù¸é ½ÇÁ¦ ¼öȯ°æ³»ÀÇ ¾î·ù °³Ã¼±º ¹× ±ºÁýºÐ¼®Àº °ú¼ÒÆò°¡µÇ¸ç, Àú¼¼ºÁ¾ ȤÀº µ¹À̳ª ¾Ï¹ÝÀ» ¼±È£ÇÏ´Â Á¾Àº ºÐ¼®¿¡¼ ¹èÁ¦µÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Áï, ÀÌ·¯ÇÑ °á°ú´Â ±Ã±ØÀûÀ¸·Î äÁý¿À·ù´Â ¹°·ÐÀÌ°í ¾î·ù»ó, °³Ã¼±º ¹× ±ºÁýdzºÎµµ »êÁ¤ ½Ã Å« ¿À·ù¸¦ °¡Á®¿À´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. °á·ÐÀûÀ¸·Î, ¿ì¸®³ª¶ó¿¡¼ ¾î·ùÁ¶»ç ½Ã ±âÁ¸ÀÇ ¹æ¹ý°ú ÇÔ²² Àü±âÃæ°Ý±â ¹æ¹ýÀÇ »õ·Î¿î µµÀÔÀº ½ÇÁ¦ ¾î·ù°³Ã¼±º ¹× ±ºÁý¿¡ ´ëÇÑ °ú¼ÒÆò°¡ÀÇ ºÐ¼®¿À·ù¸¦ °¨¼Ò½Ãų °ÍÀ¸·Î »ç·áµÇ´Â ¹Ù. ºÏ¹Ì ¹× À¯·´¿¡¼ °¡Àå º¸ÆíÀûÀ¸·Î »ç¿ëÇÏ´Â Àü±âÃæ°Ý äÁý¹ýÀº ȯ°æºÎ ȤÀº ÇØ¾ç¼ö»êºÎÀÇ ¾î·ù ÇöÀå Áöħ¼¿¡ Ãß°¡µÇ¾î¾ß ÇÒ °ÍÀ¸·Î »ç·áµÈ´Ù. |
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| The objective of this research was to evaluate an sampling effect of fish species and individual number on sampling techniques of electrofishing and conventional capture methods of cast net and kick net in 38 stream sites sampled during June - September, 2005. For the study, sampling gears were categorized as three types of electrofishing method (EM), conventional sampling technique (CM), and the combined technique (CT) of the electrofishing and the conventional method to compare statistical differences. Major differences of species composition between the CM and EM method were found in some benthic species of Misgurnus mizolepis and Iksookimia koreensis along with lithophilic species of Pungtungia herzi. These species were predominated in the EM rather than the CM, indicating that conventional sampling can underestimate the abundance of benthic or lithophilic species. In contrast ,individual number of typical water column species such as Zacco platypus and Zacco temmincki were more sampled by the CM, so that these fish populations were community overestimated. Also, t-tests on the types of sampling gear from various watersheds of Chogang Stream, Yugu Stream, Daejeon Stream, and Gap Stream showed that total individual numbers and species number in each stream were significantly (t values = 2.806-6.896, p values<0.05, n = 5-14) greater in the CT than the CM. Similar statistical significance (p<1.001, n = (10-24) on sampling seasons were observed during the monsoon and postmonsoon. These results indicate that if the electrofishing is not added to the conventional gears, the abundance of fish population and community can be underestimated and some benthic or lithophilic species may be excluded from the analysis, resulting in overall errors including sampling, fish fauna, and final judgement of community abundance. Overall our results strongly suggest that new application of electrofishing method along with the conventional sampling gears reduce sampling bias on underestimation of the real fish populations and communities. |
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| Ű¿öµå |
| Sampling gear;electrofishing;flsh community;stream;casting net; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.38, no.4, 2005³â, pp.482-493
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200518317185608)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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