Semelparity (thiab cov lus hais txog botanical "monocarpy") piav qhia keeb kwm ntawm lub neej txhais los ntawm ib leeg, kev sib tw heev ntawm kev yug me nyuam, thiab tuaj yeem sib txawv nrog iteroparity ("polycarpy”), keeb kwm ntawm lub neej txhais los ntawm kev rov ua dua (piv txwv li, "rov ua dua") bouts ntawm kev yug me nyuam thoob plaws lub neej.
Dab tsi yog qhov txiaj ntsig ntawm semelparity?
Qhov kom zoo dua ntawm kev sib luag yog tias nws tso cai rau lub cev los nqis peev ntau tshaj plaws hauv kev tsim tawm, ua rau muaj qhov loj dua clutch loj dua, kev nqis peev niam txiv ntau dua, lossis lub sijhawm luv dua.
Puas yog tib neeg semelparous lossis iteroparous?
Humans (Homo sapiens) yog ib qho piv txwv ntawm iteroparous hom - tib neeg muaj peev xwm muaj peev xwm muaj ntau yam xeeb ntxwv hauv lawv lub neej. Iteroparous vertebrates muaj xws li noog, tsiaj reptiles, ntses, thiab tsiaj txhu (Angelini thiab Ghiara 1984).
YPuas yog salmon iteroparous lossis semelparous?
Cov kab mob tuaj yeem raug cais raws li lawv lub sijhawm yug me nyuam: cov kab mob semelparous (xws li octopus, Pacific salmon) muaj ib zaug, "big-bang" tuag rov ua me nyuam, whereas iteroparous kab mob (xws li tib neeg, Atlantic salmon) muaj peev xwm ua tau ntau yam kev yug me nyuam hauv ib lub neej [1-4].
Tus tsiaj twg tsuas yog yug dua ib zaug hauv nws lub neej?
hom tsiaj no hu ua semelparous. Semelparity yog ib lub tswv yim kev yug me nyuam uas tib neeg tsuas yog yug me nyuam ib zaug hauv lawv lub neej thiab tuag sai saitom qab ntawd. Piv txwv li ntses salmon, octopus thiab marsupial nas tag nrho tuag sai sai tom qab yug me nyuam.
Nyob zoo ib tsoom niam txiv kwv tij neej tsas sawv daws
