Investigação

Início / Investigação / Apresentações / Effects of body weight and rearing system on total lipid and cholesterol concentration of m. semimembranosus and subcutaneous fat from Alentejano pigs

Effects of body weight and rearing system on total lipid and cholesterol concentration of m. semimembranosus and subcutaneous fat from Alentejano pigs

Ano
2004
Abstract

The Alentejano (AL) pig is nowadays increasingly fattened with commercial diets and consumed as fresh meat. Pork as
been linked to cardiovascular diseases due to its high fat and cholesterol contents, even though ~70% of the fat from pigs is
in a subcutaneous layer that can be removed before consumption. This work aimed to evaluate the total lipids and cholesterol concentration in the m. semimembranosus (SM) and lumbar subcutaneous fat (LSF) of AL pigs with different body weights (BW) and submitted to 2 rearing systems. Castrated male and female pigs, allocated in individual pens, were fed a commercial diet (~15% CP, ~3100 kcal DE) offered at 0.85x ad libitum. Pigs were slaughtered in groups (n=5) averaging 70.9 (W70), 80.2 (W80), 90.1 (W90), 100.5 (W100) and 110.2 kg BW (W110). Another 3 groups of pigs (n=5) with access to an outdoor rearing area (3 ha) were slaughtered at 90.4 (W90r), 100.2 (W100r) and 109.8 kg (W110r). The
individually penned pigs showed an increase (P?0.05) during growth in the total lipids of SM (from 2.2 to 4.1 g/100g in W70 and W110, respectively) and LSF (from 64.5 to 72.1 g/100g). Similar results were observed in the cholesterol content of the SM (from 52.8 to 89.4 mg/100g) and LSF (from 155.3 to 303.0 mg/100g). The groups with access to the outdoor rearing area presented smaller and not significant increases in the total lipids of SM (from 2.8 to 3.4 g/100g in W90r and W110r, respectively) and LSF (from 67.2 to 69.2 g/100g) and in the cholesterol content of SM (from 66.6 to 67.9 mg/100g) and LSF (from 219.8 to 235.4 mg/100g). Thus, the total lipid and cholesterol deposition in SM and LSF of AL pigs increased with BW, but the outdoor rearing system may moderate this deposition. In the sensitive balance between meat’s
technological and gustatory characteristics and the consumer’s health, this last effect should be considered when choosing a
rearing system for the AL pig.

Keywords

Alentejano pig; Body weight; Rearing system; M. semimembranosus; Lumbar subcutaneous fat; Total lipids; Total cholesterol

Tipo de Apresentação
Poster
Tipo de Revisão
Internacional
Âmbito Geográfico
Internacional
Situação
Publicado
Referência

Martins, J.; Neves, J.; Freitas, A.; Abreu, R.; Nunes, J.(2004). Effects of body weight and rearing system on total lipid and cholesterol concentration of m. semimembranosus and subcutaneous fat from Alentejano pigs. V International Symposium of the Mediterranean Pig..CIHEAM . Tarbes, França. pp. 33-35