Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Variation in behaviour and growth of common sole : genetic and environmental influences
Mas Muñoz, J. - \ 2013
Wageningen University. Promotor(en): Johan Verreth, co-promotor(en): Johan Schrama; Hans Komen; Robbert Blonk. - [S.l.] : S.n. - ISBN 9789461735324 - 165
tong (vis) - groei - voedingsgedrag - diergedrag - variatie - genetische factoren - milieufactoren - genotype-milieu interactie - visteelt - aquacultuur - dover soles - growth - feeding behaviour - animal behaviour - variation - genetic factors - environmental factors - genotype environment interaction - fish culture - aquaculture

Common sole (Solea solea) has a high potential for commercial aquaculture because of its consumer popularity and high market values in Europe. However, a major economic constraint for the culture of sole is its slow and variable growth. The aim of this thesis was to investigate: 1) the importance of (non-) feeding behaviour of sole in relation to variation in growth; 2) the effect of (social and physical) environmental factors on behaviour, growth and the relation between them; 3) the existence of GE interaction regarding growth. Feeding consistency, swimming activity in the tank, and boldness during (novel environment and light avoidance) behavioural tests explained variation in feed intake and thereby growth of individually housed sole. For communally housed sole, behavioural factors derived from individual behavioural tests and sex also explained variation in growth. The motivation to bury was negatively related to growth, whereas the motivation to explore a novel environment was positively related. Social interactions, both in quality (i.e., size hierarchies) and in quantity (i.e.,stocking density), influenced (non-) feeding behaviour and growth of sole. High stocking density in sole reared without substrate results in more fish-fish interactions, which increases swimming activity, FCR and variation in growth. These conditions seem to induce social stress in sole, which is alleviated when sand is provided. Environmental factors which differ between nature and farming conditions, such as food type, sand and variability of environmental conditions, influenced individual behavioural responses of sole to a novel environment test but did not induce variation in growth. Results suggest that consistent relationships between behaviour and growth develop when fish are reared in stable barren environments but not when fish experience more variable, enriched/natural environments. The role of environmental factors in the relationship between (non)-feeding behaviour and growth was supported by strong genotype by environment interaction for growth of sole reared in a semi-natural or an intensive aquaculture environment. In conclusion, the effect of (non-) feeding behaviour on growth should be taken into account to foster progress in the farming of sole. Environmental factors (i.e., substrate, stocking density) that influence behaviour and growth should be used to optimize culture systems. Future genetic selection strategies should focus more on behavioural characteristics to select sole which will be able to cope and grow best in the different rearing conditions present in commercial aquaculture.

Maternal presence and environmental enrichment affect food neophobia of piglets
Oostindjer, M. ; Mas Muñoz, J. ; Brand, H. van den; Kemp, B. ; Bolhuis, J.E. - \ 2011
Biology Letters 7 (2011)1. - ISSN 1744-9561 - p. 19 - 22.
behavior - brain - learn
Young omnivores show food neophobia in order to avoid the potential harmful effects of ingesting unfamiliar food items. We investigated whether the presence of the mother and an enriched rearing environment would reduce food neophobia in piglets. A mother may provide information on suitable food types to include in the diet, whereas an enriched environment may stimulate behavioural development and reduce reactivity towards novel stimuli (including food). Five barren-reared or enriched-reared piglets per litter were exposed to two novel food items in the presence, and the other five per litter in the absence, of the mother in a 7 min test. Maternal presence reduced food neophobia profoundly as reflected in a reduced latency to touching the food, a higher proportion of piglets sampling the two different food items and a higher intake. Latency to touch the food, however, was affected by maternal presence more strongly for barren-reared piglets than for enriched-reared piglets, and in the absence of the sow, consumption of one novel food type and time spent in the feeding area were higher for enriched-reared piglets
Maternal presence and environmental enrichment affect food neophobia of piglets
Oostindjer, M. ; Mas Muñoz, J. ; Brand, H. van den; Kemp, B. ; Bolhuis, J.E. - \ 2010
YouTube
This video shows piglet half-litters tested in the presence and absence of the mother. This research was published in the journal Biology Letters in the paper: Maternal presence and environmental enrichment affect food neophobia of piglets by Marije Oostindjer, Julia Mas Munoz, Henry Van den Brand, Bas Kemp and J. Elizabeth Bolhuis. The doi link for the article is http://dx.doi.org/10.1098/rsbl.2010.0430
Consistency of individual differences in burying and anti-predator behaviour and its relationship with body weight and growth in sole (solea solea)
Mas Muñoz, J. ; Schneider, O. ; Komen, J. ; Schrama, J.W. - \ 2010
In: Proceedings of the 9th International Congress on the Biology of Fish, Barcelona, Spain, 5-9 July 2010. - - p. 158 - 158.
Variation in growth, feed intake and behaviour of sole
Mas Muñoz, J. ; Schneider, O. ; Komen, J. ; Schrama, J.W. - \ 2010
In: Proceedings of the 44th Congress of the International Society for Applied Ethology (ISAE), Uppsala, Sweden, 4-7 August 2010. - Wageningen : Wageningen Academic Publishers - ISBN 9789086861507 - p. 100 - 100.
Effects of maternal presence and environmental enrichment on food neophobia of piglets
Oostindjer, M. ; Mas Muñoz, J. ; Brand, H. van den; Kemp, B. ; Bolhuis, J.E. - \ 2010
In: Proceedings of the 44th Congress of the International Society for Applied Ethology (ISAE), Uppsala, Sweden, 4-7 August 2010. - Wageningen Academic Publishers - ISBN 9789086861507 - p. 50 - 50.
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