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(IUCN SSC Hippo Specialist Subgroup). ãã®ç²æ¶²ã«çŽ°èã®å¢æ®ãé²ãåãããããå·ãè² ã£ãŠæ³¥äžã«å ¥ã£ãŠãåè¿ããã®ãé²ãããšãã§ãã[5][6]ã, ãã®ãŠãŒã¢ã©ã¹ãªå€èŠãããã«ãã¯âç©åã§åãã®éãèé£åç©âãšãã£ãå°è±¡ãæãããããšãå€ããããããéçã®ã«ãã¯ç°çã§ãããèªåã®çžåŒµãã«äŸµå ¥ãããã®ã¯ãã¯ããã©ã€ãªã³ãããçã ãã§ãªããä»ã®çžåŒµãããæ¥ãã«ããæ»æããããšããããéå士ã®çžåŒµãäºãã«ãããŠã¯åœãèœãšãããçæ»ã®éå·ãè² ãåäœãå°ãªããªãããŸããæ°ãã«çžåŒµããä¹ã£åã£ãéã¯ãã©ã€ãªã³ãšåãããã«å 代ã®ãã¹ã®åäŸã殺ããå殺ãããè¡ãããšã確èªãããŠããã, åºç£åãããã¯åãå®ãããšããéã¯ãé以äžã«æ°æ§ãèããªããåäŸã®ã«ãã¯æé£å¯Ÿè±¡ãšããŠçãããããšãå€ãããã§ãããçžåŒµãã«äŸµå ¥ããã¯ãã«è¥²ãããããåã¿ä»ããŠçã£äºã€ã«ãããšããå ±åäŸãããããã®äžæ¹ã§ãå£ãéãããŸãŸã®ã«ãã®çã«å°é³¥ãæ¢ãŸã£ãŠãå°é³¥ãé£ã³å»ããŸã§ãã®ãŸãŸã§ãããšããäŸããã¯ããæž¡æ²³äžã®ããŒãã€ã³ãã©ãæé£ããããšããŠãããšããã«ãå²ã£ãŠå ¥ããã¯ãã®æé£ã劚害ãããšããäŸãããã, 人éãšã«ãã®é¢ãã¯ãã«ããé£èå å·¥ãã圢跡ãèŠã€ãã£ãã¢ããªã«ã®ããŒãªå±€ïŒè±èªçïŒããã16äžå¹Žåã«ãŸã§ããã®ãŒããããšãå€æããŠãã[15]ãã«ããç©ãå³ãæããã4,000-5,000幎åã®çµµã圫å»ãçºèŠãããŠããã, å€ä»£ãšãžãã人ã¯ã«ãããã€ã«ã®ç°çãªåç©ã§ãããšèªèãã貎æã®å¢ã«ã¯ç©ç察象ãšããå³ãæãããŠãã[16]ããŸããã»ãç¥ã®è±¡åŸŽãšããŠæŠãã¹ãååšãšããŠã¯ããšå ±ã«ç©ãããããã«ããªã£ãããºãŒã«ãŒäººã¯ãã©ã€ãªã³ããã«ããåªããŠãããšèããã«ãã®ããã«åæ¢ã§ãããšããææ³ããã£ãŠãã[17][18]ã, ãŠã¬ã³ãã®ãšãã¯ãŒãæ¹ã»ãžã§ãŒãžæ¹ã§ã¯åäœå¯åºŠïŒã¯ã€ãŒã³ã»ãšãªã¶ãã¹åœç«å ¬åã§1å¹³æ¹ããã¡ãŒãã«ããã31é ã«éããããšããã£ãïŒãé«ããæ¡é£æŽ»åã«ããæ¹å²žã®æ£®æãæ¶å€±ãåå£ã䟵é£ããã[5]ããã®ããã¢ããªã«å€§éžã§ã¯åããŠéçåç©ã®äººçºç管çèšç»ãšããŠ1962 - 1966幎ã«çæ ç調æ»ãè¡ãã€ã€éåŒããå®æœããã[5]ãããã«ãã沿岞ã®æ€çãå埩ãä»ã®åç©ã®çæ¯æ°ãå¢å ããããéåŒããåæ¢ãããšç¶æ³ã¯æ»ã£ãŠããŸã£ã[5]ããŠã¬ã³ãã®ã¯ãŒãã¿ãŒã«ãããã®è©Šã¿ã¯æ£äžããšãªãå¯èŒžã暪è¡ããããã«ãªã£ãããæ¬çš®ã®çæ çç¥èŠã¯ããããèšç»ã«ãã調æ»ããåŸããããã®ãå€ã[5]ã, 蟲å°éçºã«ããçæ¯å°ã®ç Žå£ããé£çšãççšã®ä¹±ç²ãªã©ã«ããçæ¯æ°ã¯æžå°ããŠãã[3]ãå°åå·®ãããæ±ã¢ããªã«ã§ã¯çæ¯æ°ãå€ããšèããããŠãã[3]ãäžæ¹ã§2003幎ã«ã³ã³ãŽæ°äž»å ±ååœã§ã¯8幎éã§çæ¯æ°ãçŽ95 %æ¿æžãããšããå ±åããã[3]ãå¯çã»å¯èŒžãããããšãããã1989 - 1990幎ã«ã¯15,000ããã°ã©ã ã1991 - 1992幎ã«ã¯27,000ããã°ã©ã ã®çãå¯èŒžããããšæšå®ãããŠãã[3]ã1995幎ã«ã¯ã·ã³ãã³æ¡çŽéå±æžIIã«æ²èŒãããŠãã[2]ã, ã¢ããªã«ã§ã¯ãéçåç©ããã®æ»æã«ãã人éã®æ»è æ°ã¯ãã«ãã«ãããã®ãæãå€ããšèšãããŠãããããã¯å·èŸºã®ã«ãã®çžåŒµãã«èª€ã£ãŠäŸµå ¥ããããšãåå ãšããã[19]ãã¢ããªã«ã§ã¯1幎ãããçŽ500人ãã«ãã«è¥²ãããŠæ»äº¡ããŠãã[20]ã, ãã€ãŠã移ååç©åãããã«ãã€é£åã®ããã«ãã¯ããããåç©åã§é£Œè²ããã[21]ãæ±å±±åç©åã®ã«ãã®çªïŒã€ããïŒãéåãïŒ2代ç®ïŒãšãçŠåãïŒå代ïŒã¯ã19é ã®ä»ããããæå€ç£èšé²ã§ãã[22]ãæè¡ã®åäžããã1997幎ã«å€§éªåžå€©ç寺åç©åã§ã¯æ¥æ¬ã§åããŠã¬ã©ã¹è¶ãã«æ°Žäžãæ©ãã«ãã芳å¯ã§ããã«ãèã補äœãã[23]ããã®å±ç€ºã¹ã¿ã€ã«ã¯å¯å£«ãµãã¡ãªããŒã¯ã®ãã¯ã³ããŒã»ãªãã»ãããããªã©ãè¿œéããŠããããŸããç¥æžåžç«çååç©åã¯ã¹ããŒãã®åŸæãç·©ãããããªã¢ããªãŒãé æ ®ããã«ãèã2003幎ã«é ã£ãŠããã, ã¯ã·ã³ãã³æ¡çŽã§åœéååŒãçŠæ¢ãããŠãã象çã®ä»£æ¿åãšããŠãã«ãã®çãå°éãå·¥èžåã®é«çŽçŽ æãšããŠäœ¿ãããããšãããã, ãã€ãžã§ãªã¢ã®ã€ãžã§ãšããæ°æã§ã¯ãæ°Žã®ç²ŸãšããŠåŽããããã«ãã象ã£ãé¢ãšã«ãã®çããäœã£ãåªãçšã®æããŒã¹ã»ã¿ã¹ã¯ïŒè±èªçïŒãæã£ãŠå ãã®ååŒãè¡ã£ãã, åµæ¥åœæ䜿çšãããŠãããã³ããããã¹ã®æŽåäžã®å§¿ãã«ãã«äŒŒãŠãããããã®ãã£ã©ã¯ã¿ãŒãçãŸããããŸãèªç€Ÿãåå€å±çºç¥¥ã§äžéšåã«åºãŸã£ãäºãšåå€å±ã®æ±å±±åç©åã§é£Œè²ãããŠããã«ãã®éåã»çŠåã®åå«ãå šåœã®åç©åã«åºãŸã£ãŠããããšã«ãããã£ãŠããŠãŒã¶ãŒã®äºæ¥ãå šåœã«åºãŸãããã«ãšããé¡ãããããããŠãã. 2008. 100mèµ°ã®ã¿ã€ã ã¯äœå枬å®ã«ãã50mèµ°ãšã¯ç°ãªããçµ±èšããŒã¿ãããèš³ã§ã¯ãããŸããã50mèµ°ã®ã¿ã€ã ãã倧äœã®äºæ³ãããäºã¯ååã«å¯èœã§ãã ããã§ã¯ã100mèµ°ã®ã¿ã€ã ã®å¹³åã¿ã€ã ã幎霢å¥ãç·å¥³å¥ã«çŽ¹ä»ããŠããŸãã
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