Essays about: "age at first mating"

Found 4 essays containing the words age at first mating.

  1. 1. Reproduktionsdata hos schäfrar vid Försvarsmaktens hundavelsstation : dräktighet, kullstorlek och valpdödlighet

    University essay from SLU/Dept. of Clinical Sciences

    Author : Emma May Genfeldt; [2021]
    Keywords : dräktighet; dystoki; kullstorlek; valpdödlighet; schäfer;

    Abstract : Dräktighetstiden hos hund anses generellt vara mellan 62-64 dagar från ovulation. Dessa siffror är ganska konstanta till skillnad från om dräktighetstiden räknas från parning då tikens fertiliseringsperiod och spermiernas långa överlevnad i tiken gör att den skenbara dräktighets-tiden kan variera förhållandevis kraftigt. READ MORE

  2. 2. Causes of variation in litter size in Swedish piglet production

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Isabelle Westergren; [2017]
    Keywords : litter size; age at first mating; lactation period; weaning to service interval;

    Abstract : Litter size is influenced by a number of different factors including parity number and age at first mating as well as genetic potential and environmental factors such as management and feeding. The aim of this study was to evaluate the effect of age at first farrowing, lactation period and weaning to service interval on subsequent litter size, as well as to obtain descriptive statistics on the variation in litter size over the last few years. READ MORE

  3. 3. Uppfödning av gyltor till hållbara suggor

    University essay from SLU/Dept. of Animal Breeding and Genetics

    Author : Lina Hidås; [2010]
    Keywords : uppfödning av gyltor; rekrytering; utslagning av suggor; livstidsproduktion;

    Abstract : Half of Sweden’s 140 000-150 000 sows are culled and replaced by 75 000 gilts annually. Culling of old sows is necessary and allows new breeding material to enter the herd. However, many of the culled sows are young, and have not yet become profitable at the time for culling. READ MORE

  4. 4. Reproductive patterns in the domesticdog : a retrospective study with theDrever breed as model

    University essay from SLU/Dept. of Clinical Sciences

    Author : Bojana Bobic Gavrilovic; [2007]
    Keywords : seasonality; age; parity; gestation length; litter size; sex ratio; male fertility;

    Abstract : Despite the long history of joint life between man and the dog (Canis familiaris), there are still many aspects of canine reproduction that are not well understood. Domestication of the dog from its ancestor the wolf is thought to have occurred at least 14 000 years agoIt is a unique situation that both the ancestor – the wolf, and the domesticated descendant - the dog, are still present world wide, which gives them a very important place in the fields of interest for scientific research. READ MORE