[Muscle meat quality studies in swine. 6. The effect of genetic structure and sex].
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Animals↗
Biomedical subjects
G Ober
Publications and source records attributed to G Ober.
[Muscle meat quality in swine. 4: Response of fattening pigs to removal from pigsty and transport to slaughterhouse].
Blood was sampled through indwelling catheters from pigs taken to places for slaughter by various means of transport. Sampling took place at different measuring points between removal from pig pens and actual slaughter. The blood was tested for haemoglobin, haematocrit, glucose, and lactate. The following results were obtained: Removal and transport led to strong Hb and medium Hk rises. The levels, however, returned to normal after one-and-a-half to two hours rest. Stresses caused prior to and during anaestheria led to considerable rise of Hk and Hb as well as to maximum lactate deflection. The latter excitations superimposed all the preceding reactions of the organism. The increased of Hb, Hk, and lactate recorded from animals slaughtered as little as 20 minutes after arrival were higher than those established from animals that had been allowed some rest in between. Transport losses were reduced when the animals were moved in containers due to less motoric stress. However, no mitigation of pork quality setback can be expected as long as strong excitation continues to be caused in the animals before slaughter.
Abattoirs↗
[Hemoglobin, hematocrit, lactates and glucose in blood of fattening pigs in the course of slaughering and snout loop fixation].
Blood was sampled from fattening pigs fixed with the snout loop in the pen as well as during slaughter after control or container transport. Assays were made of haemoglobin (Hb), haematocrit (Hk), glucose concentration (PG), and lactic acid (MS) in the plasma. The mean values and standard deviations of Hb and Hk were 13.97 +/- 1.14 g/100 ml, 48.36 +/- 3.67 per cent, 15.24 +/- 1.12 g/100 ml, 49.83 +/- 4.04 per cent, 15.32 +/- 1.23 g of 100 ml, and 51.08 +/- 3.73 per cent. The means values of PG were between 51 and 101 mg of 100 ml and those of MS between 8 and 16 mMol/l.
Abattoirs↗
[Studies on the muscle meat quality of swine. 2. Effects of various ways of transport and rest periods].
The effects of transport of pigs for slaughter in containers or in conventional ways on meat quality were studied on 17 slaughter days. The following results were obtained: 1. No differences regarding the occurrence of quality deficits were recordable from the two forms of transport, when rest periods beyond 20 minutes were allowed prior to slaughter. 2. Correlations between dates of slaughter and transport forms caused differences between individual slaughters which, however, were offset and levelled by the totality of all slaughters. 3. Excitation was widely offset within one hour from transport of 60 to 70 minutes, and additional rest allowances caused only slight reduction of quality deficits. 4. No correlations were detectable between weather factors and meat quality, since no extreme climatic situations were faced.
Abattoirs↗
[Studies on the muscle meat quality of swine. 3. Significance of meat temperature with special reference to transport forms].
Pork temperatures of M. longissimus were recorded from 1,010 pigs transported in different ways 45 minutes post mortem, with the following results having been obtained: 1. Following conventional transport, pork values were significantly higher than they had been following container transport (37.8 degrees C or 36.8 degrees C). 2. Pork values were clearly influenced by driving into the slaughterhouse, high ambient temperatures, and additional environment-borne effects prevalent on the day of slaughter. Genetic configurations, transport, and rest periods, on the other hand, proved of minor importance. 3. Pork temperature was found to be unsuitable for any characterisation of pork quality, since only unimportant correlations existed with juice retention and colour brightness, and secured relationships were found to exist merely with the pH-value. 4. Changes in rectal temperature and respiratory frequency following conventional transport were slightly stronger than those following container transport. Both of them were normalised after one or two hours and are well suitable for an assessment of preceding transport stress.
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