World Rabbit Science - Vol. 10 (4)-2002https://riunet.upv.es:443/handle/10251/99712024-03-29T08:40:29Z2024-03-29T08:40:29ZLetter to the Editor BRIEF CONDITIONS OF RABBIT FARMING IN CHINAHanping, YanManxing, ZhuYouzhang, Shenhttps://riunet.upv.es:443/handle/10251/99942023-11-21T11:52:03Z2011-02-24T13:08:02ZLetter to the Editor BRIEF CONDITIONS OF RABBIT FARMING IN CHINA
Hanping, Yan; Manxing, Zhu; Youzhang, Shen
2011-02-24T13:08:02ZAbstracts of the communications presented during the 14th Hungarian Conference on Rabbit Production, Kaposvár (Hungary). May 22, 2002https://riunet.upv.es:443/handle/10251/99932023-11-21T11:52:03Z2011-02-24T13:04:51ZAbstracts of the communications presented during the 14th Hungarian Conference on Rabbit Production, Kaposvár (Hungary). May 22, 2002
2011-02-24T13:04:51ZTechnical note CONCENTRATION OF COPPER IN MUSCLES, LIVER, HAIR AND FAECES OF GROWING RABBITS FED DIET SUPPLEMENTED WITH COPPER SULPHATESkøivanová, V.Volek, Z.Bøezina, P.Marounek, M.https://riunet.upv.es:443/handle/10251/99922023-11-21T11:52:03Z2011-02-24T13:03:36ZTechnical note CONCENTRATION OF COPPER IN MUSCLES, LIVER, HAIR AND FAECES OF GROWING RABBITS FED DIET SUPPLEMENTED WITH COPPER SULPHATE
Skøivanová, V.; Volek, Z.; Bøezina, P.; Marounek, M.
[EN] The supplementation of diets for rabbits with copper
has been restricted in the EU to 35 mg/kg. In our experiment,
quadruple concentration of Cu added to a pelleted diet as
CuS04.5H,0 was used to investigate effect of Cu feeding on Cu
concentration in muscles, liver, ha ir and faeces of Hyplus® rabbits.
The main ingredients of the basal diet were alfalfa meal, wheat
bran, sunflower meal, oat, barley, sugarbeet pulp and soyabean
mea l. Six rabbits, 35 days of age at the beginning of the experiment,
were fed basal diet (containing 1 O mg Cu/kg), and six rabbits were
fed Cu-supplemented diet. Cu concentration in faeces was
measured weekly. Rabbits were slaughtered at the age of 87 days.
Cu concentrations in muscles, liver, hair and faeces were assayed
by the atomic absorption spectrometry. The highest concentration of Cu was found in liver of Cu-fed rabbits: 118.5 ± 31.8 mg/kg (4.6
± 0.5 mg/kg in controls). The Cu concentration in meat of Cu-fed
rabbits was very low: 0.48 ± 0.05 and 0.37 ± 0.04 in hindleg and
loin, respectively. Corresponding Cu concentrations in control
rabbits were 0.48 ± 0.05 and 0.35 ± 0.04 mg/kg. Hair of Cu-fed
and control rabbits contained 9.55 ± 0.46 and 9.14 ± 1.05 mg Cu/
kg, respectively. On average, faeces of Cu-fed and control rabbits
contained 273 and 15.3 mg Cu/kg, respectively. Faecal excretion
is thus probably the main route of Cu output in Cu-fed rabbits. On
the basis of our results, we conclude that Cu-fed rabbits
accumulated Cu in the liver. No substantial Cu retention in the
meat of Cu-fed supplemented rabbits was observed.
2011-02-24T13:03:36ZNUTRITIVE VALUE OF RAW MATERIALS FOR RABBITS: EGRAN TABLES 2002Maertens, L.Perez, J.M.Villamide, M.Cervera, C.Gidenne, T.Xiccato, G.https://riunet.upv.es:443/handle/10251/99912023-11-21T11:52:03Z2011-02-24T12:59:36ZNUTRITIVE VALUE OF RAW MATERIALS FOR RABBITS: EGRAN TABLES 2002
Maertens, L.; Perez, J.M.; Villamide, M.; Cervera, C.; Gidenne, T.; Xiccato, G.
[EN] Feedstuff tables are presentad including the
composition and the nutritiva value of 53 raw materials used in
compound diets for intensively reared rabbits. Each raw material
is characterised by 23 analytical data and its digestible protein
and energy values. Because of the importance of the fibre fractions
in the nutrition of the rabbit, special efforts have been done to
characterise the carbohydrate complex. The digestibility data were
selected after a compilation of original literatura data and a discussion between the authors. The methodology used, in the
different in vivo assays, was evaluated accurately in order to judge
the reliability of the data. Besides digestible and metabolisable
energy values are also presentad because they lead to a better
mutual comparison between raw materials for formulation
purposes. Finally, attention has been drawn that the presentad
nutritiva values fit well with the proposed nutrient composition and
show coherence in each category of feedstuffs.
2011-02-24T12:59:36ZEFFECT OF DIETARY STARCH LEVEL AND SOURCE ON PERFORMANCE, CAECAL FERMENTATION AND MEAT QUALITY IN GROWING RABBITSXiccato, G.Trocino, A.Sartori, A.Queaque, P.I.https://riunet.upv.es:443/handle/10251/99902023-11-21T11:52:03Z2011-02-24T12:57:58ZEFFECT OF DIETARY STARCH LEVEL AND SOURCE ON PERFORMANCE, CAECAL FERMENTATION AND MEAT QUALITY IN GROWING RABBITS
Xiccato, G.; Trocino, A.; Sartori, A.; Queaque, P.I.
[EN] To evaluate the effects of starch level and source on
growth performance, caecal fermentation, and carcass and meat
quality, six diets were formulated including different percentage of
barley (B) or corn (C) or equal proportions of the two cereals (BC)
to obtain moderate (M) or high (H) starch levels, and fed to 96
rabbits from 35 d of age until slaughter (73 d). Within starch level,
B and C diets presented similar chemical composition and nutritive
value while starch digestibility was higher in B diets. The starch
source did not affect growth performance and meat quality and
showed weak effects on caecal fermentation, apart from a higher proportion of valerate in rabbits fed diets C (P<0.05). According to
cereal inclusion rate, M diets were lower in starch (17.0 vs 20.6%
DM) and digestible energy concentration (12.1 vs 12.6 MJ/kg DM)
and higher in fibre concentration (ADL: 4.7 vs 3.9% DM) than H
diets. The starch level affected growth performance: H diets
stimulated weight gain (41.7 vs 43.5 g/d; P<0.05) and improved
feed conversion (P<0.001) in comparison with M diets but did not
affect health status or caecal fermentation. High-starch diets also
increased dressing percentage (60.9 vs 61.5%; P<0.05), and
cooking losses and share press force of meat.
2011-02-24T12:57:58ZINFLUENCE OF MUSCLE TYPE, REFRIGERATION STORAGE AND GENETIC LINE ON ANTIOXIDANT ENZYME ACTIVITY IN RABBIT MEATHernández, P.López, A.Marco, M.Blasco, A.https://riunet.upv.es:443/handle/10251/99882023-11-21T11:52:03Z2011-02-24T12:55:30ZINFLUENCE OF MUSCLE TYPE, REFRIGERATION STORAGE AND GENETIC LINE ON ANTIOXIDANT ENZYME ACTIVITY IN RABBIT MEAT
Hernández, P.; López, A.; Marco, M.; Blasco, A.
[EN] Oxidative processes in meat lead to meat quality
deterioration. Meat has endogenous antioxidants and prooxidants.
Our objective was to study the activity of the antioxidant enzymes
in two different lines of rabbit and its variation through refrigerated
storage. Twenty rabbits from two synthetic breeds selected for
different criteria (litter size and growth rate) were used in this
experiment. The activity of catalase, glutathione peroxidase (GSHPx)
and 2-thiobarbituric acid-reactive substances (TBARS) were
measured during 5 days of storage at 4°C in Longissimus dorsi (LO) and the set of muscles of the hind leg (HL). Catalase and
GSH-Px activities were higher in HL than in LO. The activity of
catalase was stable during refrigerated storage for HL while
decreased in LO. GSH-Px was more affected by the refrigerated
storage, which decreased its activity in both muscles. No changes
were shown in TBARS through the 5 days of storage. There were
no differences in the activity of the antioxidant enzymes between
the two genetic lines studied.; [FR] Les processus d'oxydations peuvent mener a la
détérioration de la qualité de la viande. La viande posséde des
antioxydants et des pco-oxydants endogénes. Notre objectif est
d'étudier l'activité d'enzymes antioxydantes dans deux souches
de lapin, et leurs variations au cours du stockage en chambre
froide (4ºC). Vingt lapins de deux souches hybrides, choisies pour
des différences sur certains critéres (taille de portee et vitesse de
croissance), ont été employés dans cette expérience. L'activité
de la catalase, de la glutathion-peroxydase (GSH- Px) et des
substances réactives a l'acide 2-thiobarbituric (TBARS) ont été mesurées pendant 5 jours de stockage a 4°C, sur le muscle
/ongissimus dorsi (LO) et sur un ensemble de muscles de la cuisse
(HL). Les activités de la catalase et de la GSH-Px étaient plus
élevées dans le HL que dans le LO. L'activité de la catalase était
stable pendant le stockage frigorifique pour HL, alors qu'elle
diminuait dans le muscle LO. L'activité de GSH-Px a été affectée
par l'entreposage frigorifique; son activité a diminué dans HL and
LO. Aucun changement n'a été montré pour l'indice TBARS pour
les 5 jours du stockage. Les deux souches de lapins ne présentent
aucune différence dans l'activité des enzymes antioxydantes.
2011-02-24T12:55:30ZSPERMATOZOAL VELOCITY AND MOTILITYAND ITS RELATIONSHIP TO FERTILITY IN THE RABBIT INSEMINATED WITH LOW SPERM NUMBERSHagen, D.R.Gilkey, A.L.Foote, R.H.https://riunet.upv.es:443/handle/10251/99872023-11-21T11:52:03Z2011-02-24T12:53:21ZSPERMATOZOAL VELOCITY AND MOTILITYAND ITS RELATIONSHIP TO FERTILITY IN THE RABBIT INSEMINATED WITH LOW SPERM NUMBERS
Hagen, D.R.; Gilkey, A.L.; Foote, R.H.
[EN] The objective of this study was to examine the
relationship between velocity and fertility of rabbit sperm, using
low sperm numbers per insemination. Semen was collected weekly
for 5 weeks from two fertile males. To study the effect of high
dilution of sperm in media without macromolecules, each semen
sample was split with one portien retained as whole semen, and
the remainder was centrifuged and washed with saline. The washed
sperm were resuspended with seminal plasma (SP), phosphatebuffered
saline (PBS), or PBS containing 1 % (wt/vol) of bovine
serum albumin (BSA). Each week two non-lactating does per buck
were each inseminated at the cervix with 0.5 X 106 total sperm,
for a total of 80 does inseminated. This was followed immediately
with injection of luteinizing hormone. Sperm were video taped at
this time. The velocity of 25 sperm from each semen sample was
determined by each of two observers (50 sperm total). The two
observers also estimated the percentage of motile sperm. Fertilized and unfertilized oocytes (1635 total) were recovered from the
oviducts 42 hours after insemination. Both the percentage of motile
sperm and their velocity were greatly affected by the washing and
diluting fluid used. The ranges for these two variables, respectively,
were 1 to 50% and 11 to 100 Fm/second. The percentage of motile
sperm and velocity were highly correlated (P<0.05) in the different
treatments (BSA=O. 77; SP=0.59; PBS=0.81; WS=0.86). Fertility
ranged from 42 to 85%. Velocity was not more useful than the
percentage of motile sperm in predicting fertility. The importance
of including macromolecules in the diluting fluids to maintain
motility of highly diluted sperm was obvious from the five-fold or
greater improvement in motility and velocity of sperm by adding
BSA. Good fertility was obtained with low sperm numbers
inseminated on the cervix in media containing macromolecules,
even following extensive washing and storage.
2011-02-24T12:53:21Z