BIS 2B Lecture Notes - Lecture 4: Camouflage, Arctic Circle, Ecological Niche

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E(cid:458)ample:2(cid:268)o(cid:401)al: s(cid:459)m(cid:267)iont- li(cid:452)e in, (cid:453)ith, o(cid:401) on anothe(cid:401) o(cid:401)(cid:307)anism and o(cid:267)tain nut(cid:401)ition (cid:306)(cid:401)om that o(cid:401)(cid:307)anism i. i. ***study question : contrast autotrophs and heterotrophs in terms of how they acquire energy and nutrients. P(cid:401)edation e(cid:458)t(cid:401)emel(cid:459) impo(cid:401)tant (cid:306)o(cid:401) a(cid:268)(cid:400)ui(cid:401)in(cid:307) (cid:401)esou(cid:401)(cid:268)es- e(cid:452)olution o(cid:306) p(cid:401)edation (cid:268)han(cid:307)ed li(cid:306)e (cid:306)o(cid:401)e(cid:452)e(cid:401)- and di(cid:452)e(cid:401)sit(cid:459). Ea(cid:401)l(cid:459) (cid:306)ossils sho(cid:453) so(cid:306)t-(cid:267)odies that appea(cid:401) to (cid:267)e (cid:268)ompletel(cid:459) de(cid:306)enseless. Thei(cid:401) mo(cid:401)pholo(cid:307)(cid:459) (cid:267)e(cid:307)ins to (cid:268)han(cid:307)e th(cid:401)ou(cid:307)hout the (cid:306)ossil (cid:401)e(cid:268)o(cid:401)d- (cid:401)a(cid:268)e o(cid:306) e(cid:452)olution p(cid:401)edato(cid:401) (cid:452)s. p(cid:401)e(cid:459). I(cid:300)creased e(cid:262)(cid:262)icie(cid:300)c(cid:373) o(cid:262) predatio(cid:300) o(cid:300) pre(cid:262)erred pre(cid:373) (cid:625)e. (cid:263). hu(cid:299)(cid:299)i(cid:300)(cid:263)birds, parasites, sea slu(cid:263)s(cid:626) possibl(cid:373) reduced co(cid:299)petitio(cid:300), ca(cid:300) also i(cid:263)(cid:300)ore co(cid:299)ple(cid:372)it(cid:373) o(cid:262) the e(cid:300)(cid:366)iro(cid:300)(cid:299)e(cid:300)t. The (cid:637)opti(cid:299)al (cid:262)ora(cid:263)er(cid:638) (cid:367)ill do (cid:367)hate(cid:366)er (cid:299)a(cid:372)i(cid:299)izes the di(cid:262)(cid:262)ere(cid:300)ce b/(cid:367) costs a(cid:300)d be(cid:300)e(cid:262)its. Crab predictio(cid:300): (cid:263)reatest re(cid:367)ard per u(cid:300)it ti(cid:299)e co(cid:299)es (cid:262)ro(cid:299) eati(cid:300)(cid:263) i(cid:300)ter(cid:299)ediate sized (cid:299)uscles. Su(cid:307)a(cid:401)2and2(cid:306)at2(cid:602)hi(cid:307)h2ene(cid:401)(cid:307)(cid:459)2(cid:306)oods(cid:603)2taste2(cid:459)umm(cid:459),2ou(cid:401)2taste2(cid:267)uds2ha(cid:452)e2not2e(cid:452)ol(cid:452)ed2as2(cid:306)ast2as2ou(cid:401) a(cid:267)ilit(cid:459)2to2p(cid:401)odu(cid:268)e2(cid:306)ood 2 ma(cid:458)imizin(cid:307) ener(cid:307)(cid:459) o(cid:452)er time (cid:268)an (cid:267)e maladapti(cid:452)e (cid:453)hen ener(cid:307)(cid:459) is a(cid:267)undant (cid:602)too2eas(cid:459)2to2(cid:307)et2(cid:268)alo(cid:401)ies 2o(cid:267)esit(cid:459)2p(cid:401)o(cid:267)lem(cid:603) Foragers have other goals besides maximizing energy intake per unit time: avoid predators, find mates, obtain specific micronutrients or vitamins, avoid toxins.

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