From owner-drosophila@net.bio.net Fri Jun 24 23:00:00 1994 Path: biosci!agate!howland.reston.ans.net!gatech!newsfeed.pitt.edu!usenet!buehler From: buehler@pop.pitt.edu (Eugen C. Buehler) Newsgroups: bionet.drosophila Subject: Re: Collecting eggs: when's best? Date: Sat, 25 Jun 94 12:41:45 GMT Organization: University of Pittsburgh Lines: 22 Message-ID: References: <2ufnfd$t16@cronkite.ocis.temple.edu> NNTP-Posting-Host: flies3.bio.pitt.edu X-Newsreader: VersaTerm Link v1.1.1 I have generally found that we get the most eggs starting about 2 hours after the dark cycle begins. Other factors include the age of the flies (younger flies will tend to lay more) and the stock you are injecting (w- lay a lot more than ry-). Finally, fresh yeast paste seems to be a strong inducement to lay eggs. To see our whole protocol see our Web server at: http://flies3.bio.pitt.edu/ Eugen Buehler Dept. of Biological Sciences University of Pittsburgh In Article <2ufnfd$t16@cronkite.ocis.temple.edu>, nbaggott@astro.ocis.temple.edu (Nicholas Baggott) wrote: > >We've been doing a lot of microinjections and have gotten to the point >where a limiting factor is egg availablity. Could anyone send me a >reference or give me advice on factors that affect egg laying. I'm >especially interested in knowing what time of the light-dark cycle is best >for collecting fresh eggs. .