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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.41, no.spc, 2008³â, pp.77-85
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( Grazing Rate and Pseudofaeces Production of Native Snail Cipangopaludina chinensis malleata Reeve on Toxic Cyanobacterium Microcystis aeruginosa ) |
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| º» ¿¬±¸´Â ±¹³»»ê ³í¿ì··À̸¦ ÀÌ¿ëÇÏ¿© ³²Á¶·ù Microcystis aeruginosa¿¡ ´ëÇÑ ¼·½ÄÀ² (grazing rate, GR) ¹× ¹è¼³¹° »ý»ê(pseudofaeces production)À» ºÐ¼®ÇÏ¿´´Ù. ¼·½Ä È¿°ú¸¦ È®ÀÎÇϱâ À§ÇØ ´Ù¾çÇÑ ½Ã°£, °³Ã¼Å©±â, °³Ã¼¹Ðµµ, ¸ÔÀÌ³óµµ Á¶°Ç ÇÏ¿¡¼ ½ÇÇèÇÏ¿´´Ù. ¸ðµç ½ÇÇèÀº 3¹Ýº¹µÇ¾úÀ¸¸ç ½ÇÇè¼ö´Â ¸Å³â M. aeruginosa°¡ ºó¹øÇÏ°Ô ¹ß»ýÇÏ´Â Àϰ¨È£(¼¿ï¼ÒÀç)ÀÇ ÇöÀå¼ö¸¦ ÀÌ¿ëÇÏ¿´´Ù. ½ÇÇè°á°ú, ³í¿ì··ÀÌ´Â ÅõÀÔ ÈÄ 1½Ã°£ ÈÄ¿¡ 0.538L $gAFDW^{-1}h^{-1}$ÀÇ ÃÖ°í GR¸¦ º¸ÀÌ´Ù°¡ 7½Ã°£À» °æ°è·Î ¼¼È÷ °¨¼ÒÇÏ¿´À¸¸ç À¯±â¹° »ý»ê·®Àº 7½Ã°£ ÈÄ¿¡ 50.30mg $AFDW^{-1}$·Î °¡Àå ¸¹Àº ¾çÀ» ³ªÅ¸³Â´Ù. ¼·Î ´Ù¸¥ Å©±âÁ¶°Ç¿¡¼ °¢ °í°¡ 4.5cm¹Ì¸¸ÀÎ µ¿¹°ÀÇ ¿©°úÀ² ¼öÄ¡ÀÇ º¯È°¡ Å©°í 13½Ã°£ ÈÄ¿¡ ºñ½ÁÇÑ ¼öÄ¡°¡ ³ªÅ¸³ª´Â ¹Ý¸é, 4.5cmÀÌ»óÀÎ °ÍÀº FRÀÇ º¯ÈÆøÀÌ $-0.789{sim}1.348L$ $gAFDW^{-1}h^{-1}$·Î ºñ±³Àû Á¼°í 4½Ã°£ ÀÌÈĺÎÅÍ Å©±âÀÇ Áõ°¡¿¡ »ó°ü¾øÀÌ À¯»çÇÑ ¼öÄ¡°¡ ¹Ýº¹µÇ¾ú´Ù. ¹Ðµµ´Â 1.5ind. $L^{-1}$¿¡¼ $9.7{mu}gL^{-1}$·Î °¡Àå ³·Àº ¿±·Ï¼Ò ${alpha}$ ³óµµ¸¦ ³ªÅ¸³ÂÀ¸¸ç ±× À̻󿡼´Â ¹ÐµµÀÇ Áõ°¡¿¡ »óÀÀÇÏ´Â ¼·½Ä´ÉÀÇ È¿°ú¸¦ ³ªÅ¸³»Áö ¾Ê¾ÒÀ¸¸ç ¹Ðµµ°¡ Ä¿Áü¿¡ µû¶ó PFPsµµ Áõ°¡ÇÏ¿´´Ù. ¸ÔÀ̳󵵴 ¿ø¼öÀÇ ¿±·Ï¼Ò ${alpha}$³óµµ°¡ $168.3{mu}g;L^{-1}$·Î ³·À» ¶§ 0.897L $gAFDW^{-1}h^{-1}$ÀÇ °¡Àå ³ôÀº ¿©°úÀ²À» º¸ÀÎ ¹Ý¸é PFPs´Â $673{mu}g;L^{-1}$ÀÇ ³ôÀº ¿ø¼ö ³óµµ¿¡¼ 25.85mg $AFDW^{-1}$¸¦ ³ªÅ¸³» ¸ÔÀÌ³óµµ¿Í ºñ·ÊÇÏ´Â °á°ú¸¦ º¸¿´´Ù. µû¶ó¼, ±¹³»»ê ³í¿ì··ÀÌ´Â ¼öÇ¥¸é¿¡ ºÎÀ¯ÇÏ´Â À¯ÇØÁ¶·ù Á¦¾î¿¡ È¿°úÀûÀÏ °ÍÀ¸·Î ÆÇ´ÜµÇ¸ç, ÇöÀå¿¡¼ÀÇ Àû¿ë¹æ¹ý ¹× »ýŰ迡¼ÀÇ ÀÛ¿ë¿¡ °üÇÑ ÈÄ¼Ó ¿¬±¸°¡ ¿ä±¸µÈ´Ù. |
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| Grazing rates (GR) and pseudofaeces production (PFP) of native snail, Chinese mystery snail (Cipangopaludina chinensis malleata Reeve) on natural colonial morphs of Microcystis aeruginosa was measured. C. chinensis was collected from the upstream of the Geum River (Boryeong, Korea), where they co-habituated with Unio douglasiae and Lanceolaria acrorhyncha. The experiments were performed to evaluate the GR and PFP at different conditions such as; incubation time (1, 3, 5, 7, 9 and 11 hr), body size (3 to 6.1 cm, n=28), snail density (0.5, 1, 1.5 and 2.0 ind. $L^{-1}$) and prey concentration (168.3, 336.7, 505.0 and $673.0{mu}g;Chl-{alpha}L^{-1}$). All experiments were triplicated, and conducted in transparent acrylic vessel (3L in volume). Regarding feeding time, a highest GR (0.538L $gAFDW^{-1}h^{-1}$) and PFP $(7.18mgAFDW^{-1})$ appeared at 1hr and 7hr after snail stocking, respectively. Interestingly, the snail, smaller than 4.5cm in body size, showed a wide range of GR ($-4.173{sim}1.087L;gAFDW^{-1}h^{-1}$) for the initial period (1 and 4hrs of stocking), compared to those greater than 4.5cm, which showed a stable FR, higher than 0.5L $gAFDW^{-1}h^{-1}$. Upon density effect, the density of 1.5 ind. $L^{-1}$ induced the most effective inhibition on Microcystis biomass with highest PFP. On the prey concentration, highest GR (0.897L $gAFDW^{-1}h^{-1}$) and PFP (3.67 mg $gAFDW^{-1}h^{-1}$) were induced at the level of $168.3{mu}g;Chl-{alpha}L^{-1}$ and $673{mu}g;Chl-{alpha}L^{-1}$, respectively. GR and PFP of this freshwater snail on the cyanobacterial bloom (M. aeruginosa) varied with the feeding conditions, and they were comparatively high for a short period of time less than 7hrs regardless of the stocking condition. Our results suggest that this freshwater snail has a potential to control cyanobacterial bloom when provided with suitable condition. |
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| Ű¿öµå |
| Chinese mystery snail;Cipangopaludina chinensis malleata;grazing rate;pseudofaeces production;Microcystis aeruginosa; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.41, no.spc, 2008³â, pp.77-85
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200814364033998)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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