food anticipatory activity (faa) was assessed in rainbow trout ( oncorhynchus mykiss ) in two small raceways using demand-feeding (t2) and hand-feeding (t2). the fish of both raceways were subjected to restricted feeding (rf) at two times in two places and the fish distribution and/or trigger actuation, total agonistic behaviour between fish, and swimming speed were measured. food anticipatory ...

Food anticipatory activity (FAA) was assessed in rainbow trout ( Oncorhynchus mykiss ) in two small raceways using demand-feeding (T2) and hand-feeding (t2). The fish of both raceways were subjected to restricted feeding (RF) at two times in two places and the fish distribution and/or trigger actuation, total agonistic behaviour between fish, and swimming speed were measured. Food anticipatory ...

To compare the behaviour of sows and the physiological indices of their offspring in stall and group-housing systems, 28 sows were randomly distributed into two systems with 16 sows in stalls, and the other 12 sows were divided into three groups with four sows per pen. The area per sow in stalls and groups was 1.2 and 2.5 m2, respectively. Back fat depth of the sow was measured. Salivary cortis...

fics rodents is characterized by the display of a number of species-typical behaviours. The term ‘agonistic behaviour’, introduced by Scott (1966), is defined as “a system of behaviour patterns having the common function of adaptation to situations involving physical conflict between members of the same species”. Agonistic behaviour betPsicothema, 1997. Vol. 9, no 2, pp. 333-336 ISSN 0214 9915 ...

The results relating to agonistic behaviour obtained during an exploration of the brain of juvenile herring and lesser black-backed gulls (Larus argentatus andfuscus) with electrical stimulation are reported. As an introduction the normal agonistic behaviour of immature gulls is described. While the flight and aggressive behaviour is largely unritualized the threat behaviour is more stereotyped...

We examined agonistic behaviour in seven species of hatchling and juvenile crocodilians held in small groups (N = 4) under similar laboratory conditions. Agonistic interactions occurred in all seven species, typically involved two individuals, were short in duration (5-15 seconds), and occurred between 1600-2200 h in open water. The nature and extent of agonistic interactions, the behaviours di...

We analysed digital still photographs of two interacting free-living male zebra sharks. The recorded behaviours are similar in appearance to some male – female courtship and mating patterns in elasmobranchs and several of the positions are similar to or resemble reproductive behaviours known from other species. We discuss two possible hypotheses that may explain the interaction, sexual behaviou...