ENTO 208 1st Edition Lecture 7 Outline of Lecture 6I. Internal Anatomya. Respiratory Systemb. Circulatory Systemc. Digestive Systemd. Nervous Systeme. Reproductive Systemf. Endocrine SystemOutline of Lecture 7I. Types of ReproductionII. Exoskeletona. Partsb. moltingIII. Types of Metamorphosis (3)IV. Tick life-cycleV. Insects as pestsCurrent Lecture (7)I. Reproductive typesa. Oviparous – egg bearing, most common type, embryonic development occurs outside motherb. Viviparous – embryonic development inside mother, no egg (live birth of larvae)c. Ovoviviparous – embryonic development inside mother in an egg; live birth of larvae.II. Exoskeletona. Epicuticle: waxy and water proof, helps individual conserve waterb. Exocuticle: hardc. Endocuticle: flexibled. Epidermis: living layere. Molting: endocrine releases hormones, old endocuticle is separated and new layer Is createdi. Epidermal cells produce chemicals that digest oldii. Intake air swells body to split old exoskeleton and shediii. New exoskeleton hardensiv. Exudian: leftover shell- Discontinuous growth curve for things that undergo this process (whereas something like amammal has more continuous, gradual growth)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.III. 3 types of metamorphosisa. None: ametabolousi. Undergo little or no structural change, immatures are called "young", example: silverfishb. Incomplete: hemimetabolousi. Gradual changes in body form, immatures are called nymphs (naiads in water), ex: true bugs, immatures are always aquatic, adults terrestrialii. Paurometabolous adult and immatures live in same type of habitat)- Mantis: lay large numbers of eggs, little parental care, nymphs can molt up to ten timesc. Complete: holometabolous (larvae looks completely different from adult)i. Internal organs are digested and replaced with adult structures that grow from imaginal discs, ex: lunar mothIV. Tick life cyclea. eggs, larval stage, nymph, adultb. Blood meal taken to progress to each stageV. Insects as pests:a. Annoyance, irritationi. Animals are often unable to escapeii. Physical stress- Decreased weight gains, egg & milk production, a. Results in millions of dollars lostb. Blood lossi. Exsanguination - Hurricanes result in large mosquito emergences c. Inhalation suffocationi. Swarm potential hosts, become inhaled and potential host diesd. Dermatitus/Alopeciai. Mechanical - Insects crawling on skinii. Chemical - immune response to the saliva from insecte. Allergic responsei. Reaction to insect saliva, venoms (anaphylactic shock)f. Envenomationi. Biting/stingingg. Myiasisi. Invasion of living host tissue by fly larvaeh. Fear of arthropodsi. Entomophobia, arachnophobiaii. Delusional parasitosis- Mistaken belief of being bitten by or infested with
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