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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.40, no.3, 2007³â, pp.431-438
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Á¶·ùÁ¦°Å È¿°ú¿¡ ´ëÇÑ Top-down ¾î·ù Á¶ÀÛ½ÇÇè
( Top-down Fish Biomanipulation Experiments on Algal Removal Effects ) |
| ÀÌ»óÀç;ÀÌÀ翬;¾È±¤±¹; Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;Ãæ³²´ëÇб³ »ý¸í°úÇкÎ;
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| º» ¿¬±¸´Â Top-down ¾î·ùÁ¶ÀÛ ½ÇÇè¿¡ ÀÇÇÑ Á¶·ùÁ¦°Å È¿°ú¸¦ Æò°¡ÇÏ´Â °ÍÀ¸·Î½á, ½ÇÇè´ë»ó ¾îÁ¾À¸·Î ±¹³» ³ó¾÷¿ë Àú¼öÁö¿¡ ¿ìÁ¡ÇÏ´Â 8Á¾ÀÇ ¾î·ù¸¦ ¼±Á¤ÇÏ¿´´Ù. ´ëÁ¶±º ¼öÁ¶ ¹× ¾î·ù󸮱º ¼öÁ¶($3{sim}6$°³Ã¼)ÀÇ ¿±·Ï¼Ò-${alpha}$ (CHL-${alpha}$) Ãʱ⠳󵵴 $100{sim}120{mu}g;L^{-1}$·Î °íÁ¤ÇÏ¿´À¸¸ç ¿ëÁ¸»ê¼Ò $5.3{sim}8.2;mg;L^{-1}$, ¼ö¼Ò À̿³󵵴 pH $7.4{sim}8.1$¸¦ À¯Áö½ÃÄ×´Ù. ½ÇÇè±â°£ µ¿¾È ¾î·ù 󸮱º ¼öÁ¶ÀÇ ¿ëÁ¸»ê¼Ò·®°ú ¼ö¼ÒÀ̿³󵵰¡ ´ëÁ¶±º¿¡ ºñÇØ ³·°Ô ÃøÁ¤µÈ ¹Ý¸é Àü±âÀüµµµµ´Â Á¡ÁøÀûÀ¸·Î Áõ°¡ÇÏ´Â ¼öÄ¡¸¦ º¸¿´´Ù. ÇÑÆí ´ëÁ¶±º°ú ¾î·ù󸮱ºÀÇ CHL-${alpha}$´Â °¢°¢ 13%, 6%·Î Áõ°¡ÇÏ¿© ¿©ÀüÈ÷ Á¶·ùÀÇ »ýÀåÀÌ ÀÌ·ç¾îÁö°í ÀÖÀ½À» º¸¿´À¸³ª, ¾î·ùó¸® ±º¿¡¼ CHL-${alpha}$ Áõ°¡À²Àº ´ëÁ¶±º¿¡¼ º¸´Ù ³·°Ô ³ªÅ¸³µ´Ù. ´ëÁ¶±º°ú ¾î·ù󸮱ºÀÇ ³²Á¶·ù´Â °¢°¢ 32%, 20% °¨¼Ò¸¦ º¸¿´À¸¸ç, ³²Á¶·ù »ýÀå·üÀº ´ëÁ¶±ºº¸´Ù ¾î·ù󸮱º¿¡¼ Å©°Ô ³ªÅ¸³µ´Ù. ÀÌ´Â ¾î·ù ¹è¼³¹°¿¡ ÀÇÇÑ ¿µ¾ç¿°·ùÀÇ Áõ°¡·Î ÀÎÇÑ °ÍÀ¸·Î »ç·áµÇ¾ú´Ù. µû¶ó¼ º» ¿¬±¸°á°ú ¾î·ùÁ¶ÀÛ¿¡ ÀÇÇÑ Á¶·ùÁ¦°Å È¿°ú´Â °ÅÀÇ ¾ø´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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| This study was to test algal removal efficiency by top-down fish biomanipulation experiments in the laboratory during Agust${sim}$September 2000. We selected eight candidate fishes for the biomanipulation. We set up the experiments of eight fish-treatment tanks (3${sim}$6 fishes) with initial chlorophyll-${alpha}$ concentrations (CHL-${alpha}$) of $100{sim}120{mu}g;L^{-1}$ and one control tank including no fish with the same initial CHL-${alpha}$. All tanks were maintained water quality of dissolved oxygen $(5.3{sim}8.2mg;L^{-1})$ and pH $(7.4{sim}8.1)$ in the tests. During the biomanipulation, DO and pH in the treatments were lower than those of the control, while conductivity increased gradually in the treatments. Biomanipulation experiments showed that CHL-${alpha}$ increased 13% and 0% (mean values of 8 fishes) in the controls and treatments, respectively. These results indicate that algal growth was maintained in the control and fish treatments, but the rate of CHL-${alpha}$ in the treatments was lower than that of the control. The removal rates of bluegreens algae decreased 32% in the control, and 20% in treatments (mean values of 8 fishes) respectively, In other words, bluegreen algae showed greater growth rate in the fish treatments than the control and this was due to higher nutrients supplied from fish excretions. Overall, simple fish biomanipulation on algal control was not effective at all in these laboratory tests. |
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| Ű¿öµå |
| biomanipulation;fish;chlorophyll;bluegreen algae; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.40, no.3, 2007³â, pp.431-438
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200709905952857)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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