Onderzoek ontkieming zaden Japanse duizendknoop : Resultaten van literatuurstudie, kasproef en veldverkenning
The utility of sensor technology to support reproductive management on dairy farms
Since the 1980s, efforts have been made to develop sensors that measure a parameter from an individual cow. The development started with individual cow recognition and was followed by sensors that measure the electrical conductivity of milk and pedometers that measure activity. Some sensors like activity meters, electrical conductivity, weight floo...
Reproductive adaptations to reduce locomotor costs in viviparous fish (Poeciliidae)
Viviparity, a live-bearing mode of reproduction, has evolved over 100 times independently in vertebrate animals. Despite its frequent evolution, viviparity has a number of hypothesised disadvantages compared to the ancestral mode of reproduction, oviparity (egg-laying). One of these disadvantages is a reduction in locomotor performance during pregn...
On the genetic mechanisms of nutrient-dependent lifespan and reproduction
Dietary restriction (DR), a moderate reduction in nutrient intake, improves health or extends lifespan across many species. Moreover, recent insights have shown that also the effects of specific nutrients are of importance for the beneficial effects of DR rather than intake alone. However, we still lack much insight through what mechanisms the life...
Energy status and ovarian follicular development
Female reproduction is tightly linked to body energy status and it has become increasingly clear that disturbed energy metabolism can negatively affect reproductive performance. Nevertheless, the way how a disturbed energy status affects ovarian follicular reserve as well as follicular recruitment and growth is little investigated and not fully elu...
Body composition and reproduction in broiler breeders: impact of feeding strategies
ABSTRACT Key words: broiler breeder, feeding strategies, body composition, reproduction, behavior Nowadays, welfare issues in broiler breeders associated with nutrition and reproductive characteristics, are becoming increasingly challenging. Due to genetic selection on broilers, body composition of breeders has changed dramatically during the last ...
Non-genetic variance in pigs: genetic analysis of reproduction and production traits
Abstract Sell-Kubiak, E. (2015). Non-genetic variance in pigs: genetic analysis of reproduction and production traits. PhD thesis, Wageningen University, The Netherlands The main objective of this thesis was to study the origin of random variance in reproduction and production traits of pigs. In pig breeding for many traits it is important not only...
The role of the starfish (Asterias rubens L.) predation in blue mussel (Mytilus edulis L.) seedbed stability
Abstract Mussel beds are an important ecological component in the Wadden Sea. Mussels’ offspring settle massively in new suitable areas, forming seedbeds that may disappear again within months. The probability of a seedbed to survive the first winter is defined as seedbed stability; a definition that plays a very important role in the management of...
Mackerel winter spawning surveys 2014 - 2015 January survey: Survey report
In recent years the western Atlantic mackerel stock has expanded, resulting in an earlier start of spawning and earlier occurrence of the mackerel peak of spawning. In 2014 and 2015, mackerel winter spawning surveys have been conducted to determine the start date of mackerel spawning in the western area. During the surveys both plankton sampling an...
Mackerel winter spawning surveys 2014 - 2015 December survey
In recent years the western Atlantic mackerel stock has expanded, resulting in an earlier start of spawning and earlier occurrence of the mackerel peak of spawning. In 2014 and 2015, mackerel winter spawning surveys have been conducted to determine the start date of mackerel spawning in the western area. During the surveys both plankton sampling an...
