Ntau hom nroj tsuag thiab tsiaj txhu muaj keeb kwm ntawm lub neej uas tshwm sim los ntawm kev tuag tom qab yug me nyuam thawj zaug. Qhov no yog hu ua semelparity, thiab nws lwm txoj hauv kev (nyob ua kom rov tsim dua tshiab) yog hu ua iteroparity.
Semelparous thiab iteroparous lub ntsiab lus yog dab tsi?
Ib hom yog suav tias yog semelparous yog tias nws yog tus yam ntxwv los ntawm ib qho kev yug me nyuam ua ntej tuag, thiab nws yog tus yam ntxwv los ntawm ntau yam kev ua me nyuam nyob rau hauv nws lub neej. … Ib xyoos ib zaug yog ib tsob nroj uas ua tiav nws lub neej voj voog nyob rau hauv ib lub caij, thiab feem ntau yog semelparous.
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].
Puas yog nas semelparous lossis iteroparous?
Tsuas yog ib feem tsib ntawm cov tsiaj hauv pawg no ntawm cov tsiaj txhu marsupials - uas suav nrog Tasmanian dab, quolls thiab pouched nas - yog semelparous thiab, txog tam sim no, cov kws tshawb fawb tsis paub meej. yog kalutas nyob ntawm lawv.
Puas yog feem ntau hom octopus semelparous lossis iteroparous?
Peb tau paub txog cov qauv kev yug me nyuam ntawm cov tsiaj txhu; lawv tuaj yeem tsim dua ob peb zaug thaum lawvlub neej ncua; uas yog, lawv yog iteroparous. Yuav luag tag nrho cov octopuses are semelparous, txhais tau tias lawv rov tsim dua ib zaug thiab tom qab ntawd tuag (Mangold, 1987).
