Agris category codes: L01
COBISS Code 1.08 Language:
English
Milk production of
Bovška sheep in conventional and organic farming system
Miran
KASTELIC and Dragomir KOMPAN
Univ. of
Ljubljana, Biotechnical Fac., Dept. of Animal Science, Groblje 3, SI-1230
Domžale, Slovenia
ABSTRACT
The productivity of Slovenian autochthonous dairy sheep breed Bovška in
conventional and organic farming was studied. Bovška breed sheep are
concentrated in western part of Julian Alps in Trenta valley. Animals from
conventional system produce around eighteen percent more milk, fat, proteins
and lactose. The system of production does not affect milk composition with
exception of lactose. The flocks which entered organic farming scheme had
lower level of production before the organic farming was officially
introduced to Slovenia – the organic farming was the choice of low input
farmers. In organic and conventional production the most important effect is
that of flock. According to mentioned results and results from literature,
there are many possibilities for moderate improving of productivity in
conventional and organic farming.
Agris category codes: L02, Q04
COBISS Code 1.08 Language:
English
FATTY
ACID COMPOSITION OF LAMB MEAT AS AFFECTED BY PRODUCTION SYSTEM, WEANING AND
SEX
Angela
CIVIDINI, Alenka LEVART and Silvester ŽGUR
Univ. of
Ljubljana, Biotechnical Fac., Dept. of Animal Science, Groblje 3, SI-1230
Domžale, Slovenia
ABSTRACT
Fatty acid composition in intramuscular fat of Longissimus dorsi
(LD) of 32 Jezersko-Solčava lambs was measured in two kinds of production
system (grazing on mountain pasture and fattening in stable with hay and
cereals ad libitum) and two kinds of weaning system (suckling and weaned)
and interaction between them. The effect of sex was also determined. Pasture and stable lambs were
slaughtered at average live weight 34 kg. Sucklinglambs were slaughtered at 125 days of
age (30 kg of live weight) and weaned lambs were slaughtered at 165 days (38
kg of live weight).Lambs
on pasture displayed lower percentage of palmitic (C16:0) and oleic
(C18:1n-9) and higher percentage of linoleic (C18:2n-6), α-linolenic
(C18:3n-3), arachidonic (C20:4n-6) and eicosapentaenoic (C20:5n-3) fatty
acids. Pasture lambs had lower percentage of SFA (saturated fatty acids) and
MUFA (monounsaturated fatty acids), higher percentage of PUFA
(polyunsaturated fatty acids) and especially relatively high percentage of
C18:3n-3 (3.3%) in intramuscular fat. Pasture lambs also had higher
percentage of n-6 PUFA (15.06%), even 1.5 times higher than stable lambs
(9.34%) and consecutively higher n-6/n-3 PUFA ratio (2.1 vs. 1.6). Above all
weaning affected MUFA and PUFA. Intramuscular fat of suckling lambs
contained less MUFA (34.84% vs. 38.35%) and more PUFA (21.89% vs. 17.08%) as
well as higher n-6/n-3 ratio than weaned lambs (1.9 vs. 1.7). The
interaction between production system and weaning was statistically
significant only for α-linolenic acid, with the highest proportion in LD fat
of weaned lambs grazing on pasture (3.48%) and the lowest proportion of
weaned lambs fatten in stable (2.71%). Males had lower values of MUFA and
higher values of PUFA, n-6 PUFA and n-3 PUFA. The n-6/n-3 PUFA ratio was the
same in both sexes (1.8).
Key words: sheep / lambs /
meat / fatty acid composition / production systems / weaning / sex
Agris category codes: L10
COBISS Code
1.08 Language:
English
CHARACTERISTICS OF CARCASS AND TISSUES IN PIGS OF TUROPOLJE BREED AND
CROSSBREDS TCSL
a), Krešimir SALAJPAL, Danijel KAROLYI, Domagoj
ĐIKIĆ and Mirjana MIHELČIĆ
a)Univ. of Zagreb, Fac. of
Agriculture, Dept. of Animal Science, Svetošimunska c. 25, HR-10000 Zagreb,
Croatia
ABSTRACT Some carcass
traits and muscle fiber characteristics of m. Longissimus dorsi (MLD)
in pigs of Turopolje breed (T) and crossbreds TCSL were analyzed. The hogs T
(n = 19, 568 ± 20 days) and TCSL (n = 10, 575 ± 27 days) were progenies of
the same boar, T3HB, and sows of Turopolje breed and crossbred
CSL (♂C
Hypor line × ♀SL,
Swedish Landrace). All pigs were reared and fattened in the outdoor system,
according to traditional Croatian technology of low input. Live (LW) and
carcass weight (CW) and some carcass traits and chemical composition of
muscle and fat tissues were analyzed. In the carcass, the lean percentage
(L%) was calculated on the basis of back fat thickness (BF) and MLD
thickness, according to “two point” method (CRO, Regulation, NN 85/05). The
samples of MLD from the left side at the 13/14th rib level were
taken after slaughtering (5 min.) and frozen in liquid nitrogen until histo-morphological
analysis (diameter of slow twitch oxidative, SO; fast twitch glycolytic, FG;
and fast twitch oxidative, FOG fiber types). After chilling carcass (24 h,
at +4
ºC), the samples of MLD and the belonging back fat were taken from the same
place for analysis of chemical composition (water W, protein P, lipid L, ash
A). According to the estimated results the pigs of Turopolje breed and TCSL
significantly differed as follows: LW (95.31 and 117.10 kg), CW (77.11 and
97.50 kg), BF (31.68 and 28.00 mm), MLD dept (50.16 and 60.10 mm), L (45.25
and 47.69%), SO (33.69 and 44.24 µm), and FG (38.48 and 47.60 µm). The
chemical content of muscle and fat tissues was not significantly different
between investigated pigs.
Agris category codes: L01, Q04
COBISS Code
1.08 Language:
English
EFFECTS OF STOCKING DENSITY, CAGE AND FLOOR TYPE ON THE MEAT QUALITY OF
GROWING RABBITS
a), Gábor MILISITS, György BÁZÁR, László
LOCSMÁNDI and István NAGY
a)
Kaposvár University, Faculty of Animal
Science, Guba Sándor u. 40, H-7400 Kaposvár, Hungary
ABSTRACT
The experiment was carried out with
Pannon White growing rabbits, which were divided into four experimental
groups: 1. rabbits were reared in pens, on wire net floor, at 16 rabbits/m²
stocking density; 2. rabbits were reared in pens, on wire net floor, at 12
rabbits/m² stocking density; 3. rabbits were reared in pens, on straw litter,
at 12 rabbits/m² stocking density; 4. rabbits were reared in conventional
cages (2 rabbits/cage, 16 rabbits/m²). The experiment took place between 5
and 11 weeks of age. At the end of the trial animals were slaughtered, and
the following meat quality parameters were measured: pH 24 hours after
slaughter in the m. Longissimus dorsi and in the thigh muscle, dry
matter content in the m. Longissimus dorsi and in the thigh muscle,
meat color (L, a*, b*) in the m. Longissimus dorsi, drip, cooking and
thawing loss in the m. Longissimus dorsi and the shear force also in
the m. Longissimus dorsi. The effects of cage type, floor type and
stocking density on the meat quality parameters were evaluated by means of
multi-factor analysis of variance. For testing the significance of
differences between the meat quality of rabbits reared in pens or in
conventional cages (control) the Dunnett-test was used. Based on the results
it was established, that the pH was not affected by the cage type, floor
type and stocking density. The dry matter content of the thigh muscle was
significantly higher in the conventional cages, on the wire net floor and at
12 rabbits/m² stocking density. The drip and thawing loss of the m.
Longissimus dorsi was the highest in rabbits reared on the straw litter
floor. The cooking loss was affected significantly only by the type of cage.
The shear force was significantly affected by the cage type and stocking
density. Based on our results it could be concluded that compared to the
conventional cages rearing rabbits in pens on wire net or straw bedded floor
had no substantial effect on the rabbits’ meat quality.
Agris category codes: L01
COBISS Code 1.08 Language:
English
COMPOSITION
OF CARCASS CUTS IN YOUNG SIMMENTAL BULLS AND HEIFERS
a), Marija
đikić, Krešimir
Salajpal, Vlatka
čubrić-čurik and Ivan
Jurić
a)
Univ. of Zagreb, Fac. of Agriculture,
Dept. of Animal Science, Svetošimunska c. 25, HR-10000 Zagreb, Croatia
ABSTRACT
The proportions of main cuts (tender loin, leg, back, shoulder, upper and
lower sub-shoulder, ribs, breast, neck, belly, front and hind shank) and
tissues (muscle, fat, bones and connective tissue) in the carcasses of young
Simmental bulls (n = 13) and heifers (n = 13) were determined by carcass
dissection and compared. Bulls had higher proportion of shoulder, neck and
front shank while the share of back, ribs and breasts were higher in heifers.
The share of carcass cuts of category II was higher in bulls. They also had
higher proportion of muscle in most of the main cuts (leg, back, shoulder,
upper and lower sub-shoulder, breast, neck and belly). In contrast, the
proportion of fat tissue was generally higher in heifers’ cuts (leg,
shoulder, upper and lower sub-shoulder, ribs, breast, neck and belly).
Consequently, the proportion of muscle tissue was higher in all carcass cuts
categories in bulls while share of fat tissue was higher in heifers.
Proportions of bones and connective tissue in the main cuts and carcass cuts
categories were similar between bulls and heifers. Overall, the average
share of muscle, fat, bones and connective tissue in the carcass halves was
70.45, 7.46, 16.33 and 5.76% in bulls, and 67.09, 10.72, 16.25 and 5.94% in
heifers, respectively.
