Ilimin abinci na beyar launin ruwan kasa

bear mai launin ruwan kasa (Ursus arctos)  yana daya daga cikin dabbobi mai cin komai a duniya kuma an rubuta shi don cin abinci mafi girma na kowane bear.Carnivores of the World by Dr. Luke Hunter. Princeton University Press (2011),  A duk rayuwarsu, wannan nau'in yana da sha'awar cin kusan kowane abu ko abu da suka haɗu da shi. Tabbas babu wani dabba a cikin tsarin halittu da aka ba su, wanda watakila ya rage na wasu nau'ikan beyar da mutane, wanda zai iya da'awar cin abinci a cikin dama mai yawa. Abinci da ke da yawa kuma ana samun saukin samu ya fi so. Tsarin jaw din su ya samo asali ne don dacewa da dabi'un cin abinci. Abincinsu ya bambanta sosai a duk yankunansu daban-daban bisa ga dama. A lokacin bazara, gawawwakin da aka samar da hunturu, ciyawa, tsiro, sedges da forbs sune manyan abubuwan abinci ga bears masu launin ruwan kasa daga kusan kowane bangare na rarraba su. 'Ya'yan itace, gami da 'ya'yan itacen, suna ƙara zama da muhimmanci a lokacin rani da farkon kaka. Tushen da kwararan fitila sun zama masu mahimmanci a cikin kaka ga wasu yawan beyar cikin gida idan amfanin 'ya'yan itace ba su da kyau. An kwatanta bambancin abinci a yammacin Amurka, kamar yadda nama ya kasance kashi 51% na matsakaicin abinci na shekara-shekara don grizzly bears daga Yellowstone National Park, yayin da ya kasance kashi 11% kawai na abincin shekara-sheko don grizzlies daga Glacier National Park 'yan mil ɗari zuwa arewa.

 Dabbobi masu shayarwa 

 Manazarta