BIOL 312 Lecture Notes - Lecture 1: Species Complex, Megaselia, Phoridae
14 Nov 2017
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Drosophila testacea (fly): kills y chromosome in sperm so that only females are produced. Due to (cid:858)selfish(cid:859) ge(cid:374)e o(cid:374) x (cid:272)hro(cid:373)oso(cid:373)e that destro(cid:455)s y-bearing sperm. Insects make up 50% of described species: 1,000,000 insects (55,000 in canada), 5,000 mammals, Cryptic species and dna barcoding: use mitochondria genome. Common costa rican skipper butterfly: 4 cryptic species (each row, odd/even: male/female). Also differences in larval morphology, host plant. (cryptic because they look the same thought to be one spp. ) Terry erwin: tropical forests: their richness in coleoptera and other arthropod species. Highly cited, controversial paper was the first to suggest a huge number of insect diversity (30 million) to put a spotlight on rain forest canopies. Focused on one specific tree (19 of those trees) to estimate individual number of insects extrapolate to estimate overall number of insects. Named hundreds of insects (cid:858)agra(cid:859) i(cid:374)se(cid:272)ts are (cid:449)hat he is (cid:373)ost (cid:272)o(cid:373)(cid:373)o(cid:374)l(cid:455) k(cid:374)o(cid:449)(cid:374) for.
