Akwai nau'o'in nau'in kifayen da ba su da saukin sauyin muhalli da ke faruwa a muhallin da suke zaune. Wasu suna amsawa da kyau ta hanyar daidaitawa wasu kuma ba sa yin hakan da kyau kuma a ƙarshe suna mutuwa.
Akwai nau'in kifin daji da ke da yawa a cikin Bahar Rum da ke da ninkaya da sauri da suna iya jin ƙanshin mafarautan su a ƙarƙashin ruwa. Koyaya, tare da gurɓatawa, kowane canji na ƙanshin ruwan zai iya shafar tserewa wannan kifin. Ta yaya warin ruwa ke shafar waɗannan kifayen?
Ƙananan yara
Waɗannan kifayen na iya kaiwa girma a lokacin balagaggun su kusan 45 cm tsayi. Yana da jiki mai tsawo, yana ƙarewa da ƙugi tare da manyan leɓunan nama. Dangane da launinsa, yawanci yana tsakanin kore da launin ruwan kasa kuma yana da halin samun digo -shuɗi da ja da aka jera a jerin. Kamar yadda na ambata a baya, yana zaune a cikin Bahar Rum a cikin gadajen algae na tekun. Suna kuma rayuwa a kan duwatsu da yashi, kodayake ana iya ganin su a saman.
Thrushfish hermaphroditic ne kuma mata suna balaga da jima'i a shekara biyu. Yawancin waɗannan mata suna zama maza bayan wata shekara. Lokacin kiwo yana tsakanin Mayu da Yuni a cikin abin da mata ke sanya ƙwai a kan duwatsu waɗanda aka rufe cikin algae. Maza ne ke kula da kwai, kodayake ba sa sabunta ruwa ko gina gida.
Waɗannan kifayen suna yin mafi yawan motsi masu motsi yayin da suke iya jin warin abinci ko masu cin abincin sa.
Bincike kan warin ruwa a cikin kumburin yara
Tawagar masana kimiyya daga cibiyoyi da dama sun gudanar da bincike kan tasirin warin ruwa akan kifi. An gudanar da ƙungiyar bincike ta Cibiyar Oceanographic ta Balearic na Cibiyar Oceanography ta Spain (IEO). Domin gudanar da wannan binciken, masu binciken sun yi amfani da wani tsari wanda yake zabar kwararar ruwa da kuma bada damar banbanta bangarorin ruwa biyu daban daban a wuri daya ba tare da ainihin cakudawa ba. Ta haka ne za su iya gani a wuri guda, yadda warin ruwa ke shafar kifi.
Nazarin ya dogara ne akan halayyar kifin kafin ban -bancin daban -daban da ruwa zai iya samu. Ana iya canza waɗannan ƙanshin saboda dalilai da yawa kamar gurɓataccen ruwa daga zube. Duk da sanannen imani cewa kifaye ba su da ƙanshin ƙamshi (tunda suna rayuwa ƙarƙashin ruwa kuma ba tare da huhu ba, ba a fahimci ra'ayin da suke ji ba), tsarin ƙanshin kifin yana da rikitarwa sosai, kusan kamar na mutane.
Adamu Gouraguine, dalibi ne na digiri na uku a Jami'ar Essex, United Kingdom, tare da zama a Oceanographic na Balearic Islands kuma shine babban marubucin binciken. Adam ya bayyana cewa masana kimiyya da dama suna amfani da wannan fasahar tun daga shekarun 2000 don ganin yadda warin ruwa ke shafar dabi'ar kifi. Wannan gwajin ya ƙunshi gabatar da kifin ƙura a cikin tsarin zaɓin kwarara da fallasa shi ga ƙamshi daban -daban. Yayin da kifin ke amsa wari, an yi rikodin halayensa. Jikunan ruwa a cikin tsarin basa cakuɗawa, duk da haka, kifin na iya yawo ko'ina cikin dukkansu kyauta. Ta wannan hanyar, kifin zai iya zaɓar ruwan da ya fi “so”.
Har zuwa yanzu, abin da masana kimiyya ke nazari shine tsawon lokacin da kifi ya zauna a cikin ruwa ɗaya ba tare da motsi ba. Amma a wannan lokacin, babban sabon binciken shine game da shi karo na farko da aka yi nazarin wannan halayyar, amma a cikin nau'in Bahar Rum. A lokutan baya an yi shi a cikin nau'ikan wurare masu zafi.
Sakamako da gwaji na biyu
Ƙananan yara na Thrush ba su nuna wani fifiko ga kowane jikin ruwa ba. Zamanin kifin da suka yi amfani da shi ya kasance tsakanin yatsun hannu da manya, don haka suka yarda da barazanar, suna nuna hali daban, amma suna ɗaukar haɗarin. Bayar da wannan sakamakon, ƙungiyar masu bincike za ta yanke shawarar kammala binciken. Duk da haka, an ɗauki wani ƙarin mataki don yin nazari ba kawai lokacin kifin da aka kashe a cikin kowace jikin ruwa ba, har ma yadda kifin ya kasance cikin kowane kwarara. Misali, ɗaya daga cikin masu canzawa da aka yi nazari shine saurin kifin da yake motsawa cikin jikin ruwa daban -daban da adadin motsin kwatsam da yayi a cikin su.
Da zarar an yi wannan gwajin na biyu, a nan ne masana suka gane yadda kamshin kifin yake da rikitarwa tunda saurin kifin yana iya zama mai nuna yadda kifin yake ji a kowane yanayi. Jarabawar ta kunshi gwada halayyar ɗamarar yara a cikin ruwa guda biyar tare da ƙamshi daban -daban: mai farauta, Posidonia oceanica, algae, kifin iri daya da tace da ruwa mai tsabta. Kowane gwajin guda biyar, ɗaya don kowane ƙanshi, an yi shi da kifaye daban -daban guda 30, ɗaya bayan ɗaya. Saboda kumburin nau'in daji ne, ba zai yiwu a ci gaba da tsare kifin ba tsawon lokaci tunda akwai haɗarin cewa kifin zai san cewa warin mai farautar bai fito daga ainihin ba. Tsakanin kamun kifin da kuma gudanar da gwajin, masu binciken sun bada damar awanni 24 na tashin hankali don sakin damuwa da kuma amfani da tankunan kifin.
Sakamakon haka shine canjin halayen kifin. tare da ƙarin motsin kwatsam a cikin ruwa tare da ƙanshin masu farauta ko abinci. Wannan yana amsa tsarin kariya wanda ke da alaƙa da tashi da abinci. An kuma lura cewa a cikin ruwan na warin kifaye iri daya, ba gudu ko adadin motsin kwatsam ba ya canza hali. Wannan yana nuna cewa a cikin ruwa inda akwai kifaye iri ɗaya suna jin lafiya kuma suna yin iyo a hankali.
Kamar yadda kuke gani, tsarin ƙanshin kifin yana da sarkakiya kuma ya zama dole ayi nazari ba wai tsawon lokacin da kifin ke cikin kowace jikin ruwa ba har ma da abin da suke yi a cikinsa.