Area de Sistemas de Produccion Animal

Asturias, Spain

Area de Sistemas de Produccion Animal

Asturias, Spain
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Sierra V.,Area de Sistemas de Produccion Animal | Sierra V.,University of Oviedo | Fernandez-Suarez V.,Area de Sistemas de Produccion Animal | Martinez A.,Area de Sistemas de Produccion Animal | And 5 more authors.
Meat Science | Year: 2010

Different biotypes of the Protected Geographical Indication (PGI) "Ternera Asturiana" were studied to determine if their differences in physicochemical characteristics and tenderization pattern during maturation (3 to 21. days) had an effect on the consumer evaluation of beef palatability. Biotype affected significantly pH, water holding capacity, chemical composition (P<0.001) and meat lightness (P<0.05). Ageing time affected significantly (P<0.05) colour, meat toughness and sensory attributes in a different way within each biotype. Multivariate analysis showed two different meat groups: 1) meat from mh-genotypes, characterized by high juice losses, lightness (L*), protein content and high sensory acceptability at intermediate (7 and 14. days) ageing times; 2) meat from rustic (AM) breed and biotypes free of myostatin mutation (AV (+/+) and AV × AM), showing higher intramuscular fat, myoglobin content, and instrumental toughness and requiring longer storage times (21. days). This should be taken into account for the proper post-mortem management and commercialization of each product to achieve its best sensory quality. © 2010 The American Meat Science Association.


Mendoza-Ibarra J.A.,Complutense University of Madrid | Ortega-Mora L.M.,Complutense University of Madrid | Pedraza-Diaz S.,Complutense University of Madrid | Rojo-Montejo S.,Complutense University of Madrid | And 6 more authors.
Veterinary Journal | Year: 2013

Bovine trichomonosis (BT) is a sexually transmitted disease of cattle caused by infection with Tritrichomonas foetus. In a recent study, T. foetus infection was detected in 41.5% of herds of an endangered beef breed, the Asturiana de la Montaña (AM), which is farmed under extensive, mountain pastoral systems in northern Spain. The objective of this study was to determine the prevalence of this pathogen in the more production-centred Asturiana de los Valles (AV) beef breed farmed in the same region, and to identify potential associated management risk factors. Infection was detected in a significantly smaller number (5.2%) of AV herds, despite the fact that both populations share the same ecological niche. Communal grazing was not identified as significant risk factor and study results suggest the prevalence of BT is likely to vary considerably depending on how the cattle are managed. © 2012 Elsevier Ltd.


Collantes-Fernandez E.,Complutense University of Madrid | Mendoza-Ibarra J.A.,Complutense University of Madrid | Pedraza-Diaz S.,Complutense University of Madrid | Rojo-Montejo S.,Complutense University of Madrid | And 5 more authors.
Veterinary Journal | Year: 2014

Bovine trichomonosis (BT) is a sexually transmitted disease that is considered a cause of early reproductive failure in cattle under extensive management conditions. Recently, Tritrichomonas foetus was detected in 41.5% of herds from one representative beef cattle breed (Asturiana de la Montaña; AM) reared in traditional mountain systems in Spain. The objective of the present study was to evaluate the effect of BT on reproductive performance and the economic consequences in AM herds. The benefits of a control program based on testing and culling infected bulls were also studied by comparing T. foetus prevalence and reproductive data before and after the implementation of the control measures.In infected herds, T. foetus infection increased calving intervals by 79. days (P<. 0.0001) and resulted in a higher percentage of cows-not-in calf (36% vs. 19%; P<. 0.001). An economic analysis showed that BT could reduce income by 68.7% in AM herds. The implementation of the control program decreased calving intervals (P<. 0.0001) and increased calving percentage (P<. 0.05). T. foetus prevalence showed a significant decline compared with the prevalence before implementing the control program (P<. 0.05). Nevertheless, after 2. years, the herd prevalence did not decrease (12.7-13.6%; P>. 0.05) and the herd incidence was 22.72%. The testing and culling policy was effective in improving reproductive efficiency but the complete elimination of BT without substantial changes in management appears unlikely because putative risk factors associated with the disease are present in the management of this breed. © 2014 Elsevier Ltd.


Mendoza-Ibarra J.A.,Complutense University of Madrid | Pedraza-Diaz S.,Complutense University of Madrid | Garcia-Pena F.J.,Laboratorio Central Of Veterinaria Of Algete | Rojo-Montejo S.,Complutense University of Madrid | And 6 more authors.
Veterinary Journal | Year: 2012

Bovine trichomonosis (BT) and bovine genital campylobacteriosis (BGC) are sexually transmitted diseases that can be important infectious causes of reproductive failure in extensively managed beef cattle where natural mating is a common practice. However, their prevalence in Europe was thought to be insignificant or very low. The purpose of this study was to investigate the prevalence and risk factors associated with BT and BCG in a representative beef cattle breed, Asturiana de la Montaña (AM), which is usually managed extensively in the mountain areas of Northern Spain and putative risk factors associated with the two diseases are present on most farms holding AM cattle. Preputial smegma samples were collected from 103 bulls belonging to 65 herds. Pathogen detection was undertaken using culture and PCR. Two scraping methods for sample collection (AI pipette and plastic scraper), as well as different culture media and DNA extraction methods were evaluated on field samples. Campylobacter fetus veneralis infection was not detected in any animal in any herd. However, Tritrichomonas foetus infection was demonstrated in 32% (33/103) and 41.5% (27/65) of bulls and herds tested, respectively. AM bulls older than 3. years (39.7%) were more likely to be infected than young bulls (16%) (OR = 3.45, CI = 1.07-11.19). An increase in repeat breeder cows was reported in herds from which T. foetus was detected (OR = 5.2, CI = 1.5-17.18). These findings highlight the re-emergence of this disease in extensively managed beef cattle in Spain. For routine diagnosis, the use of a culture technique and PCR in combination is advisable for testing smegma samples under field conditions. © 2011 Elsevier Ltd.


Moreno-Gonzalo J.,Complutense University of Madrid | Osoro K.,Area de Sistemas de Produccion Animal | Garcia U.,Area de Sistemas de Produccion Animal | Frutos P.,Institute Ganaderia Of Montana | And 4 more authors.
Parasitology Research | Year: 2014

The effects of heather (composed primarily of Calluna vulgaris with a smaller content of Erica umbellata and Erica cinerea) consumption on the establishment of incoming infective larvae (experiment 1, preventive treatment) and an adult worm population (experiment 2, curative treatment) were investigated in Cashmere goats experimentally infected with Trichostrongylus colubriformis. In experiment 1, 12 castrated male goats were divided into two groups: heather-supplemented vs. non-supplemented animals. After 2 weeks of adaptation to the diet, all goats were experimentally infected per os with 6,000 T. colubriformis third-stage larvae. Three weeks post-infection, the goats were slaughtered, and worm counts as well as female worm fecundity and development were determined. Heather consumption was associated with a close to significant (P = 0.092) reduction (mean 14 %) in larvae establishment. No effect on fecundity was observed, but the length of female worms in supplemented goats was greater (P < 0.001). In experiment 2, 15 non-lactating does were experimentally infected with 6,000 T. colubriformis third-stage larvae. At 6 weeks post-infection, three groups were established: control, heather-supplemented and heather-supplemented with polyethylene glycol. Individual faecal nematode egg output was measured twice weekly to assess gastrointestinal nematode egg excretion. The goats were slaughtered 5 weeks after heather administration (11 weeks post-infection), and worm counts as well as female worm fecundity and development were subsequently determined. Heather administration was associated with a significant (P < 0.001) decrease (between 47 and 66 % compared with control group) in egg excretion from 45 to 76 days post-infection. Although worm counts and female fecundity were lower in supplemented goats, no significant differences were observed. Overall, the results showed a reduction in T. colubriformis larvae establishment and a decrease in nematode egg excretion when heather was administered in experimentally infected goats. The heather plus polyethylene glycol treatment reduced nematode egg excretion levels at the same proportion as heather, thereby suggesting that the threshold of tannins required for an anthelmintic effect is most likely quite low. © 2013 Springer-Verlag Berlin Heidelberg.


Sierra V.,Area de Sistemas de Produccion Animal | Sierra V.,University of Oviedo | Fernandez-Suarez V.,Area de Sistemas de Produccion Animal | Castro P.,Area de Sistemas de Produccion Animal | And 6 more authors.
Journal of the Science of Food and Agriculture | Year: 2012

Background: The objective of this work was to study the post-mortem evolution of potential biomarkers (μ-calpain activity and proteolytic profile) of meat tenderisation in bovine longissimus dorsi (LD) muscle from several biotypes coming from two beef breeds ('Asturiana de los Valles' and 'Asturiana de la Montaña') and showing different levels of muscular hypertrophy (mh/mh, mh/+, +/+). Results: LD samples were taken at 2, 12, 24 and 48 h and 3, 7, 14 and 21 days post-mortem. The presence of muscular hypertrophy produced a faster rate of pH decline, faster exhaustion of μ-calpain activity and earlier occurrence of proteolytic changes. Changes in the electrophoretic pattern of some peptides from sarcoplasmic (glyceraldehyde-3-phosphate dehydrogenase) and myofibrillar (troponin T and troponin I) muscle extracts within the first 24 h significantly correlated with meat toughness and allowed accurate discrimination of meat products into two groups: (1) fast tenderising meat, coming from mh-biotypes, and (2) late tenderising meat, from normal (+/+) biotypes. Conclusion: Early monitoring (within 24 h after slaughter) of selected biomarkers in LD muscle allowed accurate prediction of ultimate meat toughness and could be used in the meat industry as a tool for early classification of beef into fast and late tenderising meat. © 2012 Society of Chemical Industry.


Celaya R.,Area de Sistemas de Produccion Animal | Ferreira L.M.M.,University of Trás os Montes e Alto Douro | Garcia U.,Area de Sistemas de Produccion Animal | Rosa Garcia R.,Area de Sistemas de Produccion Animal | Osoro K.,Area de Sistemas de Produccion Animal
Animal | Year: 2011

As the number of horses is steadily increasing in Cantabrian less-favoured areas, mostly occupied by nutritionally poor heathland communities, the objective of this research was to study and compare diet selection and performance of crossbred horses and beef cattle (Asturiana de los Valles breed) grazing these areas during the summer. A total of 20 cows (seven lactating their calves and thirteen dry) and 20 mares (eight lactating their foals and twelve dry) were managed during 3 years on a heathland area from June to September and October. The proportion of grass (mostly Pseudarrhenatherum longifolium) and heather (Erica umbellata, E. cinerea and Calluna vulgaris) in the diet selected by cows and mares was estimated in two occasions (July and September) each year using the alkane markers. All animals were weighed at the beginning, middle and end of the summer grazing season. Mares selected heath grasses and rejected heather species more than did the cows (P < 0.001), particularly in early summer (0.85 v. 0.65 herbage proportion in July; 0.63 v. 0.55 in September). Lactating state did not affect diet composition. Mares achieved more favourable (P < 0.001) body weight (BW) changes than cows, but there was also an interaction with season (P < 0.001). From June to August, cows lost BW, being the daily changes (in percentage of initial BW) -0.15%/day in lactating and -0.05%/day in dry cows, whereas both lactating and dry mares gained BW (0.16 and 0.12%/day, respectively). From August to October, lactating cows and mares lost more BW (P < 0.01) compared with their non-lactating counterparts (-0.19 v. -0.10%/day in cows, -0.14 v. -0.05%/day in mares). With regard to the offspring, BW gains between June and August were similar in calves and foals (0.83 and 0.90%/day, respectively), but thereafter calves achieved higher (P < 0.05) BW gains than foals (0.37 v. 0.16%/day). It is concluded that the low nutritive quality of these heathlands restricts, both cattle and horse performance, even during short summer grazing season, being more penalized lactating animals, especially the cows. Although calves were able to maintain acceptable growth rates, foals showed reduced ones during the second half of the grazing season. Other plant communities with better nutritive quality should be provided to assure replenishment of body reserves in dams, and enhance offspring gains to maintain sustainable grazing systems with productive herds of cattle and horses in these heathland areas. © 2011 The Animal Consortium.


PubMed | Area de Sistemas de Produccion Animal
Type: Journal Article | Journal: Meat science | Year: 2011

Fatty acid (FA) composition of intramuscular (IM, Longissimus thoracis muscle), intermuscular (IT) and subcutaneous (SC) fat of one hundred intensively fed yearling bulls with different propensities to fatten were studied. Meat samples were collected from Asturiana de los Valles bulls with different genotypes with respect to the myostatin gene (mh/mh n=24, mh/+ n=26 and +/+ n=25) and from Asturiana de la Montaa (n=25) bulls lacking the mutation responsible for double muscling and characterised by small to medium-frame size adapted to less favoured mountain areas. FA profiles were expressed as percentages of total FA (g/100g of total FA) and organised into groups (saturated (SFA), branched (BFA), monounsaturated (MUFA), C18:1trans, polyunsaturated (PUFA), n-6, n-3, conjugated linoleic acids (CLA), unsaturated (UFA)) and ratios (MUFA/SFA (M/S), PUFA/SFA (P/S), UFA/SFA (U/S), n-6/n-3). The IT depot was the most saturated and SC depot contained the most monounsaturated FAs, while IM fat had the most polyunsaturated FAs. IM fat showed the highest P/S ratio and for the n-6/n-3 ratio there were no significant differences between adipose tissue depots. In general, genotype effects were more pronounced in IM and SC fat profiles compared to the IT depot, for which no significant differences between genotypes were found in SFA, PUFA (including n-6 and n-3), UFA and most of the ratios. IM fat of mh/mh animals had the highest content of PUFA and thus the highest P/S ratio. Accordingly, the presence of the gene causing double muscling influenced the tendency to deposit carcass fat and its FA composition, mainly in IM fat. In general, when carcass fat decreased, SFA content decreased while PUFA and UFA contents increased due to the changes in their percentages.


PubMed | Area de Sistemas de Produccion Animal
Type: Journal Article | Journal: Meat science | Year: 2010

Different biotypes of the Protected Geographical Indication (PGI) Ternera Asturiana were studied to determine if their differences in physicochemical characteristics and tenderization pattern during maturation (3 to 21 days) had an effect on the consumer evaluation of beef palatability. Biotype affected significantly pH, water holding capacity, chemical composition (P < 0.001) and meat lightness (P < 0.05). Ageing time affected significantly (P < 0.05) colour, meat toughness and sensory attributes in a different way within each biotype. Multivariate analysis showed two different meat groups: 1) meat from mh-genotypes, characterized by high juice losses, lightness (L*), protein content and high sensory acceptability at intermediate (7 and 14 days) ageing times; 2) meat from rustic (AM) breed and biotypes free of myostatin mutation (AV (+/+) and AV x AM), showing higher intramuscular fat, myoglobin content, and instrumental toughness and requiring longer storage times (21 days). This should be taken into account for the proper post-mortem management and commercialization of each product to achieve its best sensory quality.


PubMed | Area de Sistemas de Produccion Animal
Type: Journal Article | Journal: Journal of the science of food and agriculture | Year: 2012

The objective of this work was to study the post-mortem evolution of potential biomarkers (-calpain activity and proteolytic profile) of meat tenderisation in bovine longissimus dorsi (LD) muscle from several biotypes coming from two beef breeds (Asturiana de los Valles and Asturiana de la Montaa) and showing different levels of muscular hypertrophy (mh/mh, mh/+, + /+).LD samples were taken at 2, 12, 24 and 48 h and 3, 7, 14 and 21 days post-mortem. The presence of muscular hypertrophy produced a faster rate of pH decline, faster exhaustion of -calpain activity and earlier occurrence of proteolytic changes. Changes in the electrophoretic pattern of some peptides from sarcoplasmic (glyceraldehyde-3-phosphate dehydrogenase) and myofibrillar (troponin T and troponin I) muscle extracts within the first 24 h significantly correlated with meat toughness and allowed accurate discrimination of meat products into two groups: (1) fast tenderising meat, coming from mh-biotypes, and (2) late tenderising meat, from normal (+/+) biotypes.Early monitoring (within 24 h after slaughter) of selected biomarkers in LD muscle allowed accurate prediction of ultimate meat toughness and could be used in the meat industry as a tool for early classification of beef into fast and late tenderising meat.

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