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Doi mat cung la “cua so tam hon” o loai chim

O con nguoi, doi mat duoc xem nhu la “cua so tam hon”, truyen dat rat nhieu cam xuc va y dinh. Mot cuoc nghien cuu moi day lan dau tien chung minh duoc rang loai chim cung dap lai cai nhin cua con nguoi.
Doi mat cung la “cua so tam hon” o loai chim.

Doi mat cung la “cua so tam hon” o loai chim

Cac loai thu an thit hay nhin vao con moi cua chung khi chung tan cong, vi vay ma cai nhin cham cham truc tiep  co the tien doan duoc nguy hiem sap den. Julia Carter – sinh vien  hoc bang Tien si tai truong Dai hoc  Bristol – va cac dong nghiep cua co da thuc hien cac thi nghiem cho thay loai chim sao da luon tranh xa dia thuc an cua chung neu co nguoi nao nhin vao cai dia do. Tuy nhien, neu mot nguoi nao do tien den gan ma anh mat  cua ho huong sang huong khac thi nhung con chim nay se tiep tuc an va an them nhieu thuc an hon nua.

Carter noi “Day la mot vi du dien hinh ve cach thuc dong vat co the thu luom nhung dau hieu tinh vi va su dung chung lam loi the rieng cua minh”.

Chim sao da hoang da co tinh xa hoi  cao va nhanh chong gia nhap vao cac loai chim khac o mot mang co xanh tot. Dieu nay se dan toi cac tinh huong tranh tim thuc an co tinh canh tranh cao. Mot con chim sao da danh gia  duoc nguy co bi an thit tuong doi thap va phan ung lai bang cach quay tro ve vung dat co nhanh hon (nhu trong cuoc nghien cuu  nay) se tranh gianh duoc thoi gian  an quy gia  truoc khi nhung con chim khac bay den manh dat nay.

Chim sao da chau Au. Mot cuoc nghien cuu  moi day da chung minh duoc rang loai chim cung dap lai cai nhin cua con nguoi. (Anh: iStockphoto/Andrew Howe)


Cac phan ung doi voi nhung dau chi bao hieu nguy co ro ret – nhu ke thu an thit thinh linh xuat hien o tren cao hay viec cac dong vat khac chay tron – cung la nhung tu lieu quy gia, nhung Carter lai tranh luan rang su dinh huong o dau va cai nhin cham cham dinh vi cua dong vat an thit moi la nhung dau chi bao hieu nguy co tinh vi hon va rat huu ich vi nhieu dong vat an thit huong dau va mat cua chung ve phia con moi khi chung tan cong.

Nghien cuu nay mo ta su bieu hien chi tiet trong phan ung cua mot con chim voi anh nhin dinh huong cua mot loai an thit song. Carter cho biet them: “Bang cach phan ung lai nhung tin hieu nhin tinh nhanh nay, chim sao da da gianh duoc loi the canh tranh giua nhung doi tuong khong tinh mat khac. Nghien cuu  nay nhan manh tam quan trong  cua viec xem xet nhung tin hieu rat tinh vi co the duoc su dung trong qua trinh quyet dinh  cua mot loai dong vat."

Lieu nhung con chim nay co hieu duoc co nguoi dang nhin chung, va chung co the dat ra mot so nguy co hay khong? Cho toi nay van chua co cau tra loi nao cho cau hoi  nay. Tuy nhien, lieu cac phan ung nay co lien quan den mot so loai ly thuyet tam ly hay khong, lieu nhung phan ung nay thuoc ve bam sinh hay dat duoc qua kinh nghiem, va ket qua cho thay la chim sao da co the phan biet duoc nhung tin hieu mat nhin tinh vi cua mot loai an thit o gan do va dieu chinh cac phan ung chong lai loai an thit theo cach co loi nhat.

Cac ket qua nay duoc cong bo truc tuyen  tren Tap chi  Bien ban khoa hoc  Hoang gia  Anh (The Journal  Proceedings of the Royal Society B).

Tim bai viet khac
Theo Khoa hoc
Updated: 06/05/2008 | Views: 112 | Comments: 0

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