Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10637/10496
Título : Long-term implications of feed energy source in different genetic types of reproductive rabbit females. I, Resource acquisition and allocation
Otros títulos: Resource acquisition and allocation
Autor : Arnau Bonachera, Alberto.
Cervera Fras, Concha.
Blas Ferrer, Enrique.
Larsen, Torben.
Martínez Paredes, Eugenio Melchor.
Ródenas Martínez, Luis.
Pascual Amorós, Juan José.
Materias: Grain.Rabbits - Genetics.Almidón.Cereales.Conejos - Genética.Conejos - Alimentación.Rabbits - Feeding and feeds.Starch.
Fecha de publicación : 1-sep-2018
Editorial : Cambridge University Press.
Citación : Arnau Bonachera, A., Cervera, C., Blas, E., Larsen, T., Martínez Paredes, E., Ródenas, L. et al. (2018). Long-term implications of feed energy source in different genetic types of reproductive rabbit females. I, Resource acquisition and allocation. Animal, vol. 12, n. 9 (sept.), pp. 1867-1876. DOI: https://doi.org/10.1017/S1751731117003287
Resumen : To achieve functional but also productive females, we hypothesised that it is possible to modulate acquisition and allocation of animals from different genetic types by varying the main energy source of the diet. To test this hypothesis, we used 203 rabbit females belonging to 3 genetic types: H (n=66), a maternal line characterised by hyper-prolificacy; LP (n=67), a maternal line characterised by functional hyper longevity; R (n=79), a paternal line characterised by growth rate. Females were fed with 2 isoenergetic and isoprotein diets differing in energy source: animal fat (AF) enhancing milk yield; cereal starch (CS) promoting body reserves recovery. Feed intake, weight, perirenal fat thickness (PFT), milk yield and blood traits were controlled during 5 consecutive reproductive cycles. Females fed with CS presented higher PFT (+0.2mm, P<0.05) and those fed AF had higher milk yield (+11.7%, P<0.05). However, the effect of energy source varied with the genetic type and time. For example, R females presented a decrease in PFT at late lactation (􀀐4.3%; P<0.05) significantly higher than that observed for H and LP lines (on av. 􀀐0.1%; P>0.05), particularly for those fed with AF. Moreover, LP females fed with AF progressively increased PFT across the RC, whereas those fed with CS increased PFT during early lactation (+7.3%; P<0.05), but partially mobilised it during late lactation (-2.8%; P<0.05). Independently of the diet offered, LP females reached weaning with similar PFT. H females fed with either of the two diets followed a similar trajectory throughout the RC. For milk yield, the effect of energy source was almost constant during the whole experiment, except for the first reproductive cycle of females from the maternal lines (H and LP). These females yielded +34.1% (P<0.05) when fed with CS during this period. Results from this work indicate that the resource acquisition capacity and allocation pattern of rabbit females is different for each genetic type. Moreover, it seems that by varying the main energy source of the diet it is possible to modulate acquisition and allocation of resources of the different genetic types. However, the response of each one depends on its priorities over time.
Descripción : Este artículo se encuentra disponible en la siguiente URL: https://www.cambridge.org/core/journals/animal/article/longterm-implications-of-feed-energy-source-in-different-genetic-types-of-reproductive-rabbit-females-i-resource-acquisition-and-allocation/46D229A299572283E64A7BFCC78E6680
Este es el pre-print del siguiente artículo: Arnau Bonachera, A., Cervera, C., Blas, E., Larsen, T., Martínez Paredes, E., Ródenas, L. et al. (2018). Long-term implications of feed energy source in different genetic types of reproductive rabbit females. I, Resource acquisition and allocation. Animal, vol. 12, n. 9 (sept.), pp. 1867-1876, que se ha publicado de forma definitiva en https://doi.org/10.1017/S1751731117003287
This is the pre-peer reviewed version of the following article: Arnau Bonachera, A., Cervera, C., Blas, E., Larsen, T., Martínez Paredes, E., Ródenas, L. et al. (2018). Long-term implications of feed energy source in different genetic types of reproductive rabbit females. I, Resource acquisition and allocation. Animal, vol. 12, n. 9 (sept.), pp. 1867-1876, which has been published in final form at https://doi.org/10.1017/S1751731117003287
URI : http://hdl.handle.net/10637/10496
Derechos: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
ISSN : 1751-732X (Electrónico).
1751-7311
Aparece en las colecciones: Dpto. Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos




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