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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.42, no.1, 2009³â, pp.26-31
¿¬°îõ¿¡ ¼­½ÄÇÏ´Â ºÏ¹æÁ¾°³ Cobitis pacifica (Cobitidae)ÀÇ »ýÅÂÀû Ư¼º
( Ecological Characteristics of Cobitis pacifica (Cobitidae) in the Yeongok Stream )
ÃÖÁرæ;º¯È­±Ù; »óÁö´ëÇб³ »ý¸í°úÇаú;»óÁö´ëÇб³ »ý¸í°úÇаú;
 
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ºÏ¹æÁ¾°³(Cobitis pacifica)ÀÇ »ýÅÂÀû Ư¼ºÀ» ¿¬±¸Çϱâ À§ÇØ 2006³â 5¿ùºÎÅÍ 2007³â 8¿ù±îÁö ¿¬°îõ ÇÏ·ù¿¡¼­ Á¶»çÇÏ¿´´Ù. º» Á¾Àº ÇÏõ ÇÏ·ù¿ª°ú Áß ÇÏ·ù¼ö¿ª ¿©¿ï¿¡ °ÉÃÄ ºÐÆ÷Çϸç ÇÏ»ó±¸Á¶´Â ÁÖ·Î ¸ð·¡·Î ÀÌ·ç¾îÁ® ÀÖ¾ú´Ù. ¼­½ÄÁö ¼ö½ÉÀº $20{sim}50cm$ À¯¼ÓÀº $0.23{sim}0.56m;sec^{-1}$ »óŸ¦ À¯ÁöÇϰí ÀÖ¾ú´Ù. ¼ººñ´Â 1 : 0.93À̾ú°í »ê¶õ½Ã±â´Â $6{sim}8$¿ùÀÌ¸ç »ê¶õ±â ¼ö¿ÂÀº $25{sim}27^{circ}C$À̾ú´Ù. ¸¸ 2³â»ý ÀÌ»óºÎÅÍ ¼ºÀû ¼º¼÷ÀÌ ÀÌ·ç¾îÁö±â ½ÃÀÛÇÏ¿´´Ù. üÀåÀÌ $40{sim}59mm$ÀÇ Áý´ÜÀº ¸¸ 1³â»ý, $60{sim}89mm$ÀÇ Áý´ÜÀº ¸¸ 2³â»ý, $90{sim}109mm$ÀÇ Áý´ÜÀº ¸¸ 3³â»ý, 110 mm ÀÌ»óÀº ¸¸ 4³â»ýÀ¸·Î ÃßÁ¤µÈ´Ù. Æ÷¶õ¼ö´Â Æò±Õ 809°³À̾ú´Ù. ¸ÔÀÌ»ý¹°Àº ÇÏ·ç»ìÀ̸ñ(Ephemeroptera)¿Í ÆÄ¸®¸ñ(Diptera)ÀÌ »ýü·®ÀÇ ´ëºÎºÐÀ» Â÷ÁöÇÏ¿´´Ù.
Ecological characteristics of Cobitis pacifica inhabited in the Yeongok Stream, Gangwon-do, Korea was investigated from May 2006 to August 2007. The major habitat was composed of sand bottom with current velocities of $0.23{sim}0.56m;sec^{-1}$ and depths of $20{sim}50cm$. The sex ratio of female to male was 1 : 0.93. It was presumed that the spawning season was the period of water temperatures of $25{sim}27^{circ}C$. Sexually matured individuals appeared over the two years of age. Frequency analysis of body length indicated that the group with $40{sim}59mm$ in body length was one-year-old, the group of $60{sim}89mm$ was two-years-old, the group of $90{sim}109mm$ was three-years-old, and the group of over 110 mm was four-years-old. The average number of eggs in the ovaries was estimated as 809 per matured female. Main prey items were Ephemeroptera and Diptera.
 
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Cobitis pacifica;spawning season;sexually matured;stomach content;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.42, no.1, 2009³â, pp.26-31
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200912651518724)
¾ð¾î : Çѱ¹¾î
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