The Effect of Photoperiod on Reproduction of Targhee Ewes

Seasonality of reproduction in sheep has created an oscillating supply of lambs. A more constant supply of lambs would allow more efficient use of facilities and labor by producers, feedlots and packing plants. Seasonal reproduction also limits the lifetime production of the ewe. Extension of the breeding season would provide a more consistent supply of lambs. In addition, more than one lamb crop per ewe could be produced annually. Not only the yearly lamb production but also the lifetime production of the ewe would then be increased. Also, the generation interval would be shortened allowing faster herd improvement. It is known that the onset of the breeding season occurs as day length decreases. The following experiment was undertaken to study the effects of various light regimes in accelerating the onset of estrus in anestrous ewes. Various mechanisms of seasonal breeding in the ewe have been proposed, but no simple overriding factor of seasonality has been found. Various artificial light treatments have accelerated the onset of the breeding season. The study reported herein was designed to examine the effects of various artificial photoperiods on the onset of sexual activity in the anestrous ewe

Induction of Fertile Estrus in Early Weaned Ewes with Controlled Light

In order to achieve more than one lamb crop per year, it is necessary to breed ewes during lactation or following a relatively short lactation. Many times this means conception must occur during the time when ewes are normally going into anestrus or are in anestrus. This preliminary study was conducted to evaluate breeding response of ewes subjected to controlled light following weaning at 45 to 60 days postpartum

Prostorna analiza održivosti razvoja malih naselja: primjer naselja na otoku Iloviku u Hrvatskoj

This paper outlines the primary research conducted on the small island of Ilovik, Croatia and the following spatial statistical analysis performed with a central goal of examining current sustainability of the village and providing future planning recommendations. For two weeks in mid-June of 2011, residents were interviewed about their current socio-economic status and perceptions of tourism, the natural environment, and government. Their responses were assigned numeric values with dummy variables excluding the least common response, and were entered as attributes of building footprint polygons digitized in a GIS to allow for spatial statistical analysis. Tests included Local and Global Getis Ord G, Ordinary Least Squares, and Geographically Weighted Regression. Clear hot and cold spots were found, showing where additional water sources are needed or where water quality should be addressed and that a coastal vs. inland divide exists. Weak correlations existed between income and all other attributes, but from the results one could suggest a focus on increasing tourism and decreasing the supply of houses for sale.U radu se iznose preliminarni rezultati znanstvenog istraživanja na otoku Iloviku u Hrvatskoj. Primarni cilj prostorne statističke analize bio je ispitati postojeću održivost razvoja naselja na otoku i dati smjernice za daljnje planiranje razvoja. Tijekom dva tjedna u srpnju 2011. provedeni su intervjui sa stanovnicima otoka u vezi s njihovim socioekonomskim statusom te pogledom na turizam, okoliš i vlast. Njihovim odgovorima dodijeljene su numeričke vrijednosti s binarnim varijablama (0 i 1) koje su isključile odgovore s najmanje sličnosti s ostalima. Vrijednosti su unesene kao atributi koji su pridruženi objektima koji predstavljaju građevine digitalizirane u GIS-u kako bi se omogućila prostorna analiza. Test uključuje lokalni i globalni Getis Ord G, Ordinary Least Squares i regresiju prema geografskom položaju. Utvrđena su područja s koncentracijom visokih i niskih vrijednosti (”vruće” i ”hladne” točke) koja upućuju na dijelove gdje je potrebno povećanje količine dostupne vode i poboljšanje kvalitete vode te gdje postoji razlika između kopna i obale. Utvrđena je niska korelacija visine prihoda i ostalih varijabli, ali rezultati pokazuju da su naglašeni rast turizma i smanjenje broja praznih objekata