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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.43, no.2, 2010³â, pp.212-220
Àâ½Ä¾î ºØ¾îÀÇ ¼·½ÄȰµ¿¿¡ ÅðÀû¹° ¹× µ¶¼º ³²Á¶ Microcystis aeruginosaÀÇ ¿µÇâ
( Effects of Sediment and Cyanobacterium Microcystis aeruginosa on the Feeding Behavior of Omnivores Gold Fish Carassius auratus )
±è¹éÈ£;±è°ÇÈñ;±è¿ëÀç;Ȳ¼øÁø; °Ç±¹´ëÇб³ ȯ°æ°úÇаú;°Ç±¹´ëÇб³ ȯ°æ°úÇаú;´ëÁø´ëÇб³ »ý¸í°úÇаú;°Ç±¹´ëÇб³ ȯ°æ°úÇаú;
 
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Àâ½Ä¼º ¾î·ù ºØ¾î(Carassius auratus)ÀÇ ¼·½ÄȰµ¿¿¡ ÅðÀû¹°°ú µ¶¼º³²Á¶ Microcystis aeruginosaÀÇ ¿µÇâÀ» ÆÄ¾ÇÇϱâ À§ÇÏ¿© ½Ç³» ¹× ÇöÀå mesocosm½ÇÇèÀ» ½Ç½ÃÇÏ°í ¾î·ù¿¡ ÀÇÇÑ ½Ä¹°Çöûũſ°ú ¼öÁúº¯È­¸¦ °¢°¢ Á¶»çÇÏ¿´´Ù. ÅðÀû¹° ½ÇÇèÀº ½Ç³» ¼öÁ¶(7 L)¿¡¼­ ³²Á¶¹ß»ý Àú¼öÁö(Àϰ¨È£, ¼­¿ï)ÀÇ ÇöÀå¼ö¿Í ÅðÀû¹°À» ÀÌ¿ëÇÏ¿´°í, µ¶¼º³²Á¶ ½ÇÇèÀº µ¶¼º(NIES-298) ¹× ºñµ¶¼º(NIES-101) ³²Á¶ M. aeruginosa¸¦ ÀÌ¿ëÇÏ¿´´Ù. ÇöÀå mesocosm½ÇÇèÀº ³²Á¶ ¹ß»ýÀÌ ±Ø½ÉÇÏ¿´´ø 2005³â 7¿ù¿¡ Àú¼öÁö ¿¬¾È¿¡ ÃÑ 9°³ mesocosm¸¦ ¼³Ä¡ÇÏ°í ¾î·ù¸¦ ¹Ðµµº° ó¸®ÇÑ ´ÙÀ½ ½Ä¹°Çöûũſ ¹Ðµµ¿Í ¼öÁúº¯È­¸¦ Á¶»çÇÏ¿´´Ù. ¸ðµç ½ÇÇèÀº 3ȸ¾¿ ¹Ýº¹À¸·Î ½Ç½ÃÇÏ¿´´Ù. ½ÇÇè°á°ú, ÅðÀû¹°ÀÌ ¾ø´Â ¼öÁ¶¿¡¼­´Â Chl-aÀÇ °¨¼Ò¸¦ º¸¿´À¸³ª ÅðÀû¹° ¼öÁ¶¿¡¼­´Â ¿ÀÈ÷·Á Chl-aÀÇ Áõ°¡¸¦ º¸¿´À¸¸ç, µ¶¼º¿¡ »ó°ü¾øÀÌ ¶Ñ·ÇÇÑ M. aeruginosa Á¦¾î´ÉÀ» ³ªÅ¸³Â´Ù. ÇöÀå mesocosm ½ÇÇè¿¡¼­´Â ºñ±³Àû ¼¼Æ÷Å©±â°¡ Å« macrophytoplankton (>$50{mu}m$)¸¦ ¼±È£ÇÑ ¹Ý¸é ³ª¸ÓÁö Çöûũſ(<$2{mu}m,;2{sim}20{mu}m,;20{sim}50{mu}m$)Àº ¿ÀÈ÷·Á ¼ºÀåÀ» ÃËÁøÇÏ¿´´Ù. ¿µ¾ç¿°Àº Á¶·ù¹Ðµµ°¡ ³ôÀº Á¶°Ç¿¡¼­ ¾î·ù µµÀÔ ÀÌÈÄ ¾Ï¸ð´Ï¾ÆÀÇ ±Þ°ÝÇÑ Áõ°¡¸¦ º¸¿´´Ù. µû¶ó¼­ Àâ½Ä¼º ¾î·ùÀÎ ºØ¾î´Â ³²Á¶µ¶¼º¿¡ »ó°ü¾øÀÌ µµÀÔÃʱâ ÀϽÃÀûÀ¸·Î Á¶·ùÁ¦¾î´ÉÀ» º¸ÀÌÁö¸¸ ÅðÀû¹° ±³¶õ ¹× ¿µ¾ç¿° ¹èÃâ·Î ÀÎÇÏ¿© ÇöÀå Á¶°Çº¸´Ù ÅðÀû¹°ÀÌ ÀûÀº Á¤¼öÀåÀ̳ª »ý¹°°ü¸®°¡ °¡´ÉÇÑ Á¶°Ç¿¡¼­ Á¦ÇÑÀûÀ¸·Î Àû¿ëÇÏ´Â °ÍÀÌ Å¸´çÇÒ °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù.
Effects of sediment and toxic cyanobacterium Microcystis aeruginosa on feeding behaviors of an omnivorous fish, gold fish (Carassius auratus) were examined in laboratory and in situ mesocosm. Laboratory feeding experiments were performed in small aquaria (7 L) with cyanobacterial blooms (mainly M. aeruginosa) under the condition of sediments and no-sediments, and toxic (NIES-298) and non-toxic M. aeruginosa (NIES-101). In situ feeding experiments were conducted at the shore of eutrophic lake (Lake Ilgam, Seoul) in the mid-July, 2005. Results showed that fish introduction decreased the concentration of Chlorophyll-a (Chl-a) at higher rate in no sediment-containing aquaria. In contrast, there was a drastic increase of Chl-a in the sedimentcontaining aquaria. Fish effectively removed the M. aeruginosa cells without algal toxin (microcystin). Fish also selectively removed the large size Chl-a (>$50{mu}m$), although all kinds of nutrients were increased after fish introduction, especially ammonia. Our results indicate that the strategic introduction of domestic omnivores Carassius auratus, to control cyanobacterial bloom in eutrophic lake will negatively play in the water quality improvement via a sediment disturbance and a density-dependent digestion.
 
Ű¿öµå
omnivore;Carassius auratus;cyanobacterial bloom;Microcystis aeruginosa;sediment disturbance;nutrient release;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.43, no.2, 2010³â, pp.212-220
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201030853091271)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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