The performance of artificially milked young hares, born in captivity or born in pens (three animals each) were compared with those of normally reared young hares (ten anoimals bearing to the control group). In experimental groups the live weights and the feed consumption were daily measured during suckling then weekly measured. In control group the live weight was measured in 15, 25, 35, 60, 90, 120, 150, 200 and 270 days old hares. Normally reared young hares were weaned at 25-28 days old, artificially milked young hares born in cages or in large pens were weaned at 35-40 and 80-90 days old, respectively. Non linear growth curves were calculated by iteratively re-weighted least squares using the classic logistic model. At fixed age live weights were compared by ANOVA. Results showed that the hare growth was fitted by the following equations: normally reared young hares, LW = 3482/(1+exp(1.627-0.022* days)) (R2 =0.985); artificially-milked young hares born in captivity, lW = 3401/(1+exp(2.405-0.035*days)) (R2=0.995); artificially-milked young hares born in pens, LW = 3985/(1+exp(2.307-0.024*days)) (R2=0.999). The disadvantage due to artificial milking was completely regained at 60-90 days by artificially milked young hares born in captivity and at 120 days by artificially milked young hares born in large pens. Maximum growth speed was reached at 74,69,97 days in the groups.
Allattamento artificiale di leprotti (Lepus europeaus Pallas) nati in gabbia e in parchetti a terra.
PACI, GISELLA;BAGLIACCA, MARCO;
1999-01-01
Abstract
The performance of artificially milked young hares, born in captivity or born in pens (three animals each) were compared with those of normally reared young hares (ten anoimals bearing to the control group). In experimental groups the live weights and the feed consumption were daily measured during suckling then weekly measured. In control group the live weight was measured in 15, 25, 35, 60, 90, 120, 150, 200 and 270 days old hares. Normally reared young hares were weaned at 25-28 days old, artificially milked young hares born in cages or in large pens were weaned at 35-40 and 80-90 days old, respectively. Non linear growth curves were calculated by iteratively re-weighted least squares using the classic logistic model. At fixed age live weights were compared by ANOVA. Results showed that the hare growth was fitted by the following equations: normally reared young hares, LW = 3482/(1+exp(1.627-0.022* days)) (R2 =0.985); artificially-milked young hares born in captivity, lW = 3401/(1+exp(2.405-0.035*days)) (R2=0.995); artificially-milked young hares born in pens, LW = 3985/(1+exp(2.307-0.024*days)) (R2=0.999). The disadvantage due to artificial milking was completely regained at 60-90 days by artificially milked young hares born in captivity and at 120 days by artificially milked young hares born in large pens. Maximum growth speed was reached at 74,69,97 days in the groups.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
