Rendimento de carcaça e composição química da carne da perdiz nativa (Rhynchotus rufescens)

KeywordsGrass hay, leukocyte counts, litter temperature, radiant heat load, sand.Submitted: December/2015 Approved: December/2015 ABSTRACTThe study aimed at evaluating the effect of litter substrates on the performance, carcass traits, and environmental comfort of red-winged tinamou (Rhynchotus rufescens). In this experiment, 160 birds, with 100 and 300 days of age, were housed into 20 pens, and distributed according to a completely randomized experimental design into five treatments with four replicates of eight birds each. Treatments consisted of five litter substrates: wood shavings, rice husks, peanut hulls, grass hay, or sand. Feed intake; weight gain; breast, hock, and footpad lesions; back feathering; total meat production; carcass and parts yield; and leukocyte counts were evaluated. Litter substrates were analyzed for dry matter content, standard microbial count, ammonia volatilization potential, water content, water holding capacity, temperature, and radiant heat load. The results showed that litter substrate did not influence the evaluated bird parameters, despite the higher microbial counts and released ammonia values determined in peanut hulls and sand, respectively. Sand also tended to have higher average temperature than the other litter substrates. It was concluded that litter substrate should be chosen at farmer discretion, taking into consideration its cost and utilization after use.

Section: Resultscontrasting

confidence: 85%

“…Moro et al (2006) reported a lower value, of 74.4%, in redwinged tinamous (Rhynchotus rufescens) submitted to different feeding programs, whereas Queiroz et al (2013), evaluating rearing density, obtained 85.48% average carcass yield in this same species.…”

Section: Resultsmentioning

confidence: 89%

Effect of Litter Substrates on the Performance, Carcass Traits, and Environmental Comfort of Red-Winged Tinamou (Rhynchotus Rufescens)

Nunes

Carvalho

Sugui

et al. 2016

“…Queiroz & Cooper (2011) reported values of 786.60±79.91 and 747.20±59.35 g live weight for adult female and male tinamous, respectively. The average slaughter weight of tinamous at 56 weeks of age was estimated as 637.30 g by Moro et al (2006).…”

Section: Resultsmentioning

confidence: 99%

Meat and carcass traits of the red-winged tinamou (Rhynchotus rufescens)

Queiroz

Carvalho

Sugui

et al. 2013

Tinamou (Rhynchotus rufescens) is a native bird of the Brazilian fauna and has great potential to become a domesticated species. From this perspective, the objective of this study was to evaluate the carcass and main parts yield and to assess meat quality of that bird. Two trials, one studying stocking density and the other litter materials, lasting 60 days each, were conducted. The studied traits were evaluated in two birds/ replicate/treatment. Performance was evaluated by the least square method. The results showed that bird age at slaughter significantly influenced carcass and breast yields (p<0.05). Mean carcass, breast, thighs+drumstick and wing yields were 86.

“…The pressure to domesticate this and other tinamous species also stems from the limited supply of birds in nature (Homma, 1993). Studies carried out using this bird in an environment similar to that used to raise broilers have shown good performance in terms of growth rate , excellent carcass and breast yields (Moro et al, 2006), and perfect adaptation to meal (Moro, 1996) and pelleted (Hoshiba et al, 2003) feeds. However, the reproductive performance of this species in captivity is still a problem that needs to be solved.…”

Section: Introductionmentioning

confidence: 99%

Reproductive and behavioral aspects of red-winged tinamous (Rhynchotus rufescens) in groups with different sex ratios

Cromberg

Boleli

Tonhati

et al. 2007

The aim of this research study was to evaluate the reproductive performance of tinamous submitted to five different male:female ratios. The study was carried out with 72 birds in a randomized experimental design with 4 replications. Tinamous were housed in cages, using the ratios of one (1:1), two (2:1), three (3:1) and four (4:1) females per male, and also one male was housed with three females individually (3R:1), in a rotational system. Reproductive records of the breeding season from September 2004 to March 2005 were used. The reproductive traits studied were: number of eggs laid, fertility, and percentage of eggs damaged and cracked by pecking. Nonparametric analyses of these traits were performed using Kruskal-Wallis test. Two replications of treatments 1:1 and 4:1, and one of treatment 2:1 were video-taped for three days, 12 hours/day. The videotapes were sampled according to the scan method to fit an ethogram. Birds were also watched for one hour per day to study dominance and agonistic behavior. None of the reproductive traits was affected by mating sex ratio (p<0.05). Female dominance could be related to displacement behavior (r=1.00), and male sitting in immobility plus sitting in activity behaviors were related to lower number of damaged eggs (r=-0.90). Social dominance was indirectly determined by displacement behavior in the study situation. A large number of damaged eggs occurred in all treatments, thereby not allowing a clear conclusion on the best male:female ratio.