Behaviour of domestic rabbits during 2 weeks after weaning.

Thirty three rabbits from five litters that were weaned at the age of 5 weeks were observed. The animals were kept in pens that were enriched with an elevation made of bricks. In total, 150 h of observations made at feeding time (07:30-10:00 and 18:00-20:30 LT, local time) were analysed. A number of affiliative, exploratory, comfort, eating, resting and locomotor behaviours were observed. Agonistic behaviour was not observed. Rabbits showed companion and location preferences: 56 % of animals had a preferred companion, and 84 % preferred a particular place in the pen. Significant effects of group size and time of day on the frequency of some forms of behaviour were found, e.g. rabbits performed comfort behaviours more often in the morning. Sex did not influence the rabbits' behaviour. Correlations were also found between different forms of behaviour, e.g. animals that performed more exploratory behaviours also showed more locomotor behaviours and affiliative interactions.

First record of Giardia assemblage D infection in farmed raccoon dogs (Nyctereutes procyonoides).

The presence of Giardia genotypes was investigated in 18 raccoon dogs (Nyctereutes procyonoides) and 80 red foxes (Vulpes vulpes) on one farm. To demonstrate Giardia cysts, fresh and trichrome stained smears were microscopically screened. Two molecular markers were used for Giardia genotyping: a fragment of the beta-giardin gene and a fragment of the glutamate dehydrogenase gene. All faecal samples obtained from red foxes were negative. Giardia cysts were identified only in 2 of the 18 raccoon dogs. The result of genotyping and phylogenetic analysis showed that the G. duodenalis from both raccoon dogs belonged to the D assemblage. This finding of a new animal reservoir of G. duodenalis canids-specific genotypes is important in order to eliminate the risk of infecting other animals bred for fur. Further molecular analyses of Giardia isolates in raccoon dogs are required. The present study represents the first contribution to knowledge of G. duodenalis genotypes in raccoon dogs.

Social behavior in preweaning lambs and their preferences in social interactions.

The aim of this study was to investigate social behavior in preweaning lambs, especially their preferences in social interactions. A total of 30 lambs (16 Polish Milk Sheep 05 and 14 Polish Whiteheaded Mutton Sheep) were observed for 113 h 30 min during the first 2 months of their lives. Interbreed differences were insignificant both in agonistic and affiliative behavior. Males appeared to be more active both in agonistic and affiliative interactions. They also preferred other males in agonistic interactions. On the other hand, females fought more often with males, than with females. Lambs of both breeds preferred individuals of their own breed as partners in affliative behaviors. Twins preferred most their siblings in affliliative interactions and usually did not attack and fight with them. This study shows that sex and breed can influence social preferences in preweaning lambs.

Body weight and some biometrical traits of ring-necked pheasants (Phasianus colchicus) at different ages.

Although the growth of pheasants is an important issue, there are few publications providing information on body weight and morphometrics of pheasants at different ages. The aim of this study was to investigate body weight, tarsus length, wing length and wingspan in farmed pheasants aged 3-16 weeks. The study was carried out on 50 pheasants (31 females and 19 males). All one-day old birds were marked and kept until the 16th week of life. In the 3rd 8 h 12th and 16th weeks of life all pheasants were weighted and tarsus length, wing length and wingspan were measured. Male chicks appeared to be significantly heavier than females (P< or = 0.01) already in the third week of life. Also their wings were longer and their wingspan attained higher values (P < or = 0.05). Absolute gains of the majority of traits also differed between sexes (being larger in males) in all studied periods. Values of body weight, tarsus length and wingspan noted in the third week of life were significantly correlated with all later measurements. Thus body weight and some biometrical traits of pheasant chicks measured already at the 3rd week of life could be applied as predictors of future body weight and size.