Verify the statements in Exercises 19–24. The matrices are square.If B D P–1AP and x is an eigenvector of A corresponding to an eigenvalue , then P–1x is an eigenvector of B corresponding also to .
Ento 2010 Week 12 Notes April 4, 2016 o Mantids can “hear” the sonar of bats Mantids dive to avoid the bats o Importance of “behavior” in mimicry: Caterpillars avoid birds Birds see leaf damage and find caterpillars Cryptic caterpillars look like leaf or twig Caterpillar eats leaf symmetrically= “no damage” o Hides behind leaf while eating o Eats part of leaf; then clips leaf= “no damage” o Order: Mantodea Mantis=prophet Common name: Mantis or mantid Species: 1,800 o Mantids Incomplete metamorphosis Chewing mouthparts 0.5-6 in. long raptorial forelegs carnivorous long thorax eggs laid in ootheca cryptic coloration o Mantis: Sways back and forth prior to attack Has spines on front legs to hold prey Has elaborate chewing mouthparts WHEN THEY CATCH IT THEY DON’T LET GO! o Why do female mantids eat their mates Theories: It releases male “inhibitions” and his sperm He provides mated female with nutrients o But male is smaller-hard to eat him while mating o Preying mantis Eggs are laid in an egg case=ootheca o Order: Phasmida Phasma=apparition Common name: walking sticks Species: 2,500 o Walking sticks Incomplete metamorphosis Chewing mouthparts Long and slender body Cryptic coloration Feed on plants Feign death when threatened Autotomy: loss of a leg to escape o Mantis: Is a generalist predator Uses antennae to recognize prey Exerts selective pressure: prey with best mimicry survive April 6, 2016 o Ethnoentomology : cultural importance of insects o African Desert Dig toxic beetle pupae from soil Squish insects onto arrows o Darrel Posey P.h.D.-UGA 1979 Ethnoentomology of the Kayapo of Central Brazil o Kayapo Agricultural-but few insect pests Main pest=mosquito (body paint) Eat: ants, bee larvae, wasp larvae o Kayapo use of insects Place ant colony near crop Cultivate ant plants Wasp colony in banana tree o Kayapo Ceremony to acquire power of wasps Young men hit large wasp nest Wasp nest=the Universe o Vincent Holt Why Not Eat Insects 1885 o Insects are nutritious Protein Fat Vitamins (A and D) o Australian Aborigines eat: Beetle larvae: Witchetty Grubs (taste like chicken) o New Guinea Sago Palm provides: Starch=80% calories Larvae of Capricorn beetle=protein snack o Insects are rich in in protein! Botswana-charcoal grilled caterpillars Thailand-steamed bamboo worms Waterbugs Steamed hornet grubs o Scott O’Grady Shot down over Bosnia Survived by eating bugs o 1995 Chinese female runners broke many track records Were they using illegal drugs o No-they ate a caterpillar infected with a fungus o South American Indians eat: Tarantulas: Capture tarantulas-avoid venom and toxic hairs Barbecue tarantulas-taste like shrimp April 8, 2016 o Insects in the Arts Butterflies are favorable subject o Bubonic Plague Ring around the rosies A pocket full of posies Ashes ashes We all fall down o Ogden Nash: Fleas Adam had ‘em o Poetry: Robert Frost Fireflies in the Garden Design (Spider & Moth) Departmental (Ants) The Road Not Taken (Silent Spring) o Insects in language: Busy as a bee Grubby Roach Social butterfly Waspish o Insects in music “Flight of the Bumble Bee” Rimsky-Karsakov o Mariah Carey- ‘Butterfly” o Maria Merian Combined art and entomology Born in Germany Went to South America at age 52 Painted: larvae, pupae, and adult insects with hostplant o Humor Gary Larson Ento 2010 at Washington State University Far Side Insects appear in cartoons more often in winter o Insects in movies Friendly “insects” humanized People use no common sense Frequent biological errors: very large insects can’t breathe o Greatest insect movie: THEM (1954) Giant ants mutated by H-bomb invade Los Angeles sewers