CRIM 318 Lecture Notes - Lecture 6: Scavenger, Anautogeny, Ovoviviparity
26 Jun 2017
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Document Summary
The need to feed: anautogeny and income breeders are common among necrophagous diptera. Insects needing food during adult stage to produce mature oocytes. Autogeny -condition in animals -adult female is capable of producing eggs upon emergence. Those that frequent carrions are anutogenous than autogenous. Necessary nutrient stored from larval -must obtain protein. Typically portein meal is necessary for oogenesis and vitellogenesis. Necrophagous flies as capital breeders or income breeders. But locmotion, degree of temperature stress in environment can shift capital to income. Energy requiring for flight calliphorids and sarcophagids -income breeding. Larval-mass effect -long term nutrient storage is limited to competing physiological mechanisms like proteotaxic stress responses. Resource allocation is less per individual egg than with flies that deposit progeny - vivipary -live birth. Mechanism of vivipary by calyptrate diptera -ovoviviparity -embryos retained in gravid females for period. 6. 3 progeny deposition is a matter of competition. Sarcophagids produce small clutches with large eggs that hatch in ovisac.
