Misalan Dabbobin Poikilothermic 10 - Encyclopedia

Wadatacce

Halaye da hali
Ab Adbuwan amfãni da rashin amfani
Saitunan Poikilotherm
Banda
Misalan dabbobin poikilothermic

The dabbobin poikilothermic (wanda kwanan nan ake kira 'ectotherms') sune waɗanda ke daidaita zafin su daga zafin yanayi.

Wannan yana faruwa ne saboda ba su da halayyar wasu halittu da yawa, wanda shine su iya daidaita yanayin zafin jikinsu ta hanyar samar da zafi: wannan shine dalilin da yasa galibi ake kiran irin waɗannan dabbobin "dabbobi masu sanyi". Dabbobin da ba poikilotherms su ne 'homeotherms' (ko 'endotherms'), wanda a cikinsa dukkan dabbobi masu shayarwa ke fitowa.

Halaye da hali

Gabaɗaya, ƙaramin poikilotherms suna daidaita zuwa zafin jiki na ɗaki, amma akwai wasu daga cikinsu waɗanda zasu iya iyakance matsanancin yanayin zafi dangane da halayyar ɗumama, kuma a lokacin ne zasu canza tasirin ɗan gajeren lokaci na canjin yanayin.

Kwanan nan wasu masana kimiyya sun gano cewa sauye -sauyen yau da kullun a cikin yanayin zafin yana canza yanayin jinsi ga ɗumamar yanayi sakamakon sauyin yanayi, ta hanyar rage haɗarin amincin zafi.

Ab Adbuwan amfãni da rashin amfani

Yayin da dabbobin endothermic ke haifar da zafi daga makamashin da ke cikin abinci, ectotherms ba sai sun ciyar da kowace rana ba kuma suna iya ma iya tafiya watanni ba tare da ciyarwa ba.

Wannan yana ba su wani fa'ida, wanda hakan ke kashewa ta gaskiyar cewa ba za su iya zama cikin mahalli da matsanancin yanayin zafi ba, saboda sun dogara ƙwarai da sauye -sauyen muhalli: endotherms, a gefe guda, na iya zama a cikin wurare masu sanyi ko zafi.

Saitunan Poikilotherm

Kamar yadda a cikin ectotherms ƙa'idar zafin jiki ya dogara da ikon daidaita musayar zafi tare da muhalli, ya zama gama gari cewa dole ne a samar da wasu don thermoregulation. Waɗannan sun kasu kashi biyu:

The gyare -gyare na hali Su ne canje -canjen halayen neman yankunan a cikin muhallin da zafin jiki ya dace da ayyukan. Akwai wasu nau'ikan da ake kira euthermic, waɗanda zasu iya rayuwa a cikin kewayon zafin jiki mai faɗi.
The gyaran jiki Waɗannan su ne waɗanda ke canza rhythms na rayuwa a yanayin zafin da ke mamaye, ta yadda ba za a canza ƙarfin metabolism ba. Irin wannan dabbar tana aiwatar da diyya ta zafin jiki wanda ke ba su damar samun matakin aiki iri ɗaya a cikin mahalli tare da yanayi daban -daban: suna kama da endotherms, kai tsaye suna daidaita metabolism ɗin su ba tare da la'akari da zafin jiki ba.

Banda

Akwai wasu lokuta na dabbobi waɗanda ba ectothermic ba, amma waɗanda ke da halaye iri ɗaya.

The mahaifa, alal misali, yana faruwa lokacin da zafin zuciya da gills ke canzawa tare da canje -canje a yanayin zafin muhalli, kamar yadda yake faruwa a wasu ƙungiyoyin kifi.
The facultative endothermyA gefe guda, yana faruwa akai -akai a cikin kwari waɗanda za su iya haifar da zafi tare da rawar jiki na tsokar su, suna ɗaga zafin jikinsu na wani lokaci.