Het effect van direct beercontact

Het niet tijdig berig worden van gelten is op veel fok- en vermeerderingsbedrijven een probleem

Tweemaal insemineren in dezelfde bronstperiode is een economische beslissing

Op veel bedrijven worden de zeugen met een lange bronst overgeonsemineerd. De achterliggende gedachte hierbij is, dat op deze wijze het juiste moment van insemineren beter wordt benaderd

Met verdund sperma toch gelijke resultaten

Wanneer 2 miljard in plaats van 3 miljard zaadcellenworden gebruikt, kan de prijs worden verlaagd. Hierdoor zou overinsemineren mogelijk wel aantrekkelijk kunnen worden

ESO Imaging Survey VII. Distant Cluster Candidates over 12 square degrees

In this paper the list of candidate clusters identified from the I-band data of the ESO Imaging Survey (EIS) is completed using the images obtained over a total area of about 12 square degrees. Together with the data reported earlier the total I-band coverage of EIS is 17 square degrees, which has yielded a sample of 252 cluster candidates in the redshift range 0.2 \lsim z \lsim 1.3. This is the largest optically-selected sample currently available in the Southern Hemisphere. It is also well distributed in the sky thus providing targets for a variety of VLT programs nearly year round.Comment: 5 pages, 3 figures, submitted to Astronomy & Astrophysic

Het effect van een- of tweemaal insemineren op de vruchtbaarheid van zeugen

Een proef is opgezet om na te gaan hoe groot het verschil in vruchtbaarheidsresultaten is tussen eenmaal geinsemineerde dieren met een korte bronst, eenmaal geinsemineerde dieren met een lange bronst en tweemaal geinsemineerde dieren met een lange bronst. Onderzocht is ook wat voor invloed pariteit, genotype, seizoen en tijdstip van aanvang van de bronst hierop hebbe

ESO Imaging survey: Optical Deep Public Survey

This paper presents new five passbands (UBVRI) optical wide-field imaging data accumulated as part of the DEEP Public Survey (DPS) carried out as a public survey by the ESO Imaging Survey (EIS) project. Out of the 3 square degrees originally proposed, the survey covers 2.75 square degrees, in at least one band (normally R), and 1.00 square degrees in five passbands. The median seeing, as measured in the final stacked images, is 0.97", ranging from 0.75" to 2.0". The median limiting magnitudes (AB system, 2" aperture, 5 sigma detection limit) are U_(AB)=25.65, B_(AB)=25.54, V_(AB)=25.18, R_(AB) = 24.8 and I_(AB)=24.12 mag, consistent with those proposed in the original survey design. The paper describes the observations and data reduction using the EIS Data Reduction System and its associated EIS/MVM library. The quality of the individual images were inspected, bad images discarded and the remaining used to produce final image stacks in each passband, from which sources have been extracted. Finally, the scientific quality of these final images and associated catalogs was assessed qualitatively by visual inspection and quantitatively by comparison of statistical measures derived from these data with those of other authors as well as model predictions, and from direct comparison with the results obtained from the reduction of the same dataset using an independent (hands-on) software system. Finally to illustrate one application of this survey, the results of a preliminary effort to identify sub-mJy radio sources are reported. To the limiting magnitude reached in the R and I passbands the success rate ranges from 66 to 81% (depending on the fields). These data are publicly available at CDS.Comment: 24 pages, 26 figures. Accepted for pubblication in A&