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Articles by A. Arguello
Total Records ( 4 ) for A. Arguello
  A. Arguello , N. Castro , J. Capote and M.B. Solomon
  The objective of this research was to study the effects of natural suckling vs a milk replacer diet and two slaughter weights (6 vs 10 kg) on carcass characteristics of kids. Forty male twins, Canary Caprine kids were randomly allocated to one of four treatments. Two groups were reared With their Dams (WD) while the other two were reared using a Milk Replacer (MR). Two end point live weights (LWS; 6 and 10 kg) were used for each feeding system. WD Kids grew faster (32%) than MR. The empty body weight, hot carcass weight and Cold Carcass Weight (CCW) were higher in the 10-kg compared to the 6-kg kids. In relation to carcass conformation measures and indices, there were differences (p<0.01) between the two diets for carcass length and leg length measurements. No effects of diet or LWS were observed for the percentage of primal cuts. WD kids were fatter than MR kids. The kids slaughtered at 10 kg LWS were fatter and less bony than 6 kg kids. The results showed that suckling method had few effects on carcass quality, but increasing slaughter weight substantially improved carcass quality.
  N. Castro , D. Sanchez-Macias , Moreno-Indias , A. Morales-DelaNuez , A. Arguello and J. Capote
  The objective of present research was to determine effects of Conjugated Linoleic Acid (CLA) inclusion in milk replacer on artificial rearing of kids. CLA was fed to newborn kids as 1.2% of the diet. A commercial CLA preparation (CLA 60) containing 60% CLA isomers was included at 2% to provide 1.2% CLA in the diet. The inclusion of CLA in diet was initiated at 2 days of life and fed until slaughter. Growth, carcass and meat quality data were collected and analyzed. Treatment groups included two control diets, one slaughtered at 6 kg (C6) Live Weight al Slaughter (LWS) and another one slaughtered at 10 kg LWS (C10) and 2 CLA supplementation at 1.2% of the diet for 6 (CLA6) and 10 (CLA10) kg LWS. Average Daily Gain (ADG) was significantly (p<0.05) affected by the inclusion of CLA in the milk replacer. CLA 1.2%+milk replacer fed kids grew at 156 g d 1 while CLA 0%+milk replacer kids grew at 130.98 g d 1. Commercial Carcass Yield (CCY) and Net Carcass Yield (NCY) were affected by CLA, where kids CLA fed (CLA6 and CLA 10) presented lower CCY and NCY than control kids. The statistical differences were slightly higher rising to p<0.05 in CCY and lower in NCY. An increase in LWS had a statistical effect on CCY and NCY, because older kids presented higher carcass yield values. A statistical interaction was observed in CCY and NCY parameters between two fixed effects, however C6 and CLA6 kids presented more differences in carcass yield than C10 and CLA10. These results may suggest a relationship between CLA feed and early abomasum development, however the empty gastro-intestinal tract was heavier in CLA6 and CLA10 than in control kids (p = 0.03). CLA in milk replacer tends to increase the total fat in the shoulder cut (p = 0.073) but no other effects are shown. There were significant differences among LWS for the percentage contribution, increasing subcutaneous and intermuscular fat, total fat and muscle and decreasing bone to carcass side weight. pH values were statistically affected by CLA inclusion in the milk replacer, but a high interaction between CLA and LWS was observed in pHu. Initial and final pH in the Longisimus toracis et lumborum and semimembranosus muscles was higher in CLA6 than C6 but these differences did not show in 10 kg LWS kids. The L, Croma and Hue values were unaffected by CLA addition in milk replacer. The L and Hue value was slightly higher in C6 than in CLA6 for the Longissimus toracis et lumborum and Semimembranosus muscles.
  M. Fresno , M.E. Ruiz , A. Arguello , N. Castro and S. Alvarez
  Forty eight Canarian goat cheeses were smoked using six different materials; shell of the almond (Prunus aulcis), segmented prickly pear cactus (Opuntia ficus indica), pine needles and wood of canary pine (Pinus canariensis), rose rock wood (Cistus monspeliensis) and heather wood (Erica arborea). Cheeses were smoked at two different ripening times: 4 and 10 days, samples of 20-days-old were analyzed. Surface cheese colour was measured using a colorimeter, measuring Lightness, Croma and Hue angle, while texture characteristics were determined using the Texture Profile Analysis (TPA) obtaining five parameters for texture: fracturability, hardness, cohesiveness, adhesiveness and elasticity. Only Lightness was affected by the age of cheese at smoking process. Cheeses smoked with Erica arborea wood and Pinus canariensis wood were statistically the darkest, while the ones smoked with Pinus canariensis needle were the lightest. Almond shell and Pinus canariensis wood produced cheeses with the highest intensive colour whereas the products smoked with Erica arborea wood and Pinus canariensis needles were the least intensive. When a smoke produced a darker colour, the Croma was high and the Hue angle was far from yellow axis. For texture characteristic, in compression test, cheeses smoked with 10-days-old were more fracturable and hardness and less elastic than others smoked with 4-days-old while the material used for smoking only affected cohesiveness.
  D. Martin , G. Caja , A. Arguello , N. Castro , S. Alvarez and J. Capote
  The effect of the ruminal bolus on the intake behaviour and digestive parameters was studied in a group of 12 castrated adult Majorera goats. For the experiment they were housed in a metabolic box for 2 weeks to allow for adaptation and fed either an ad libitum Fibrous Diet (FD) (n = 6) or a Concentrated Diet (CD) (n = 6) offered at 130% of the previous day’s consumption. The animals were subsequently divided into two similar subgroups: bolus (identified with Rumitag Bolus®) and control (simulated application). After one week of feeding with the definitive diet, the measuring period started, which lasted for 12d divided into two sub-periods separated by the application moment (subperiod I: 6d, before bolus application; sub-period II: 6d, after bolus application). Samples of faeces and material refused by the animal were collected daily in order to determine DM, OM, CP, NDF and ADF. For the FD group a significant difference was found due to the period on DMI being higher in sub- period II, but there were no significant statistical differences due to the bolus treatment. For the CD group, DMI increased during sub-period II due to the overall time spent in both sub-groups. Digestibility parameters results were probably conditioned by the stress which was caused by the accumulation of days in the pen. Taking the evolution of daily DM per kg-0.75 live weight intake into account, both groups presented a similar decrease in intake the day after bolus application, to a great extent due to the stress caused by the identification procedure, nevertheless they recovered their DMI level 48 h after application of the bolus. No statistically significant differences in diet intake and digestibility parameters were found due to the application of the ruminal bolus.
 
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