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All Categories (101-120 of 203)

  1. The effects of mixed-species assemblage on the behaviour and welfare of fish held in home aquaria

    Contributor(s):: Sloman, K. A., Baldwin, L., McMahon, S., Snellgrove, D.

    While there is growing scientific research into the welfare of fish held under aquaculture conditions, there has been little research into the welfare of ornamental fish kept in home aquaria. With the ever increasing popularity of home aquaria, there is now an urgent need to address our current...

  2. The effects of the acetic acid "pain" test on feeding, swimming, and respiratory responses of rainbow trout ( Oncorhynchus mykiss )

    Contributor(s):: Newby, N. C., Stevens, E. D.

    The acetic acid test is commonly used in conscious mammals to determine nociceptive thresholds and efficacy of analgesics. The purpose of the present study was to examine the response of rainbow trout that were not anaesthetised during the acetic acid test. Rainbow trout (n=31) were trained to...

  3. The efficacy of three types of analgesic drugs in reducing pain in the rainbow trout, Oncorhynchus mykiss

    Contributor(s):: Mettam, J. J., Oulton, L. J., McCrohan, C. R., Sneddon, L. U.

    Recent research has shown the possibility of pain perception in fish; therefore, the use of analgesia or "painkillers" should be considered for invasive procedures. However, there is relatively little information on the effectiveness of analgesic drugs nor on the appropriate dose for fish. This...

  4. The evidence for pain in fish: the use of morphine as an analgesic

    Contributor(s):: Sneddon, L. U.

    This paper discusses the evidence for pain perception in fish and presents new data on morphine analgesia in fish. Recent anatomical and electrophysiological studies have demonstrated that fish are capable of nociception, the simple detection of a noxious, potentially painful stimulus and the...

  5. Thermonociception in fish: effects of two different doses of morphine on thermal threshold and post-test behaviour in goldfish ( Carassius auratus )

    Contributor(s):: Nordgreen, J., Garner, J. P., Janczak, A. M., Ranheim, B., Muir, W. M., Horsberg, T. E.

    The question of whether fish can perceive pain is controversial, and pain is a potentially grave threat to fish welfare. To be able to study pain in a species, knowledge of its nociceptive system is necessary. There is therefore a need for standardised, repeatable and quantifiable measures of...

  6. Behavioural changes following intraperitoneal vaccination in Atlantic salmon ( Salmo salar )

    Contributor(s):: Bjorge, M. H., Nordgreen, J., Janczak, A. M., Poppe, T., Ranheim, B., Horsberg, T. E.

    Granulomatous peritonitis is often induced by intraperitoneal vaccination in fish. Peritonitis is a very painful condition in mammals, but little is known about how fish experience this condition. Previous studies have looked at pathological change and feeding behaviour in large groups of fish....

  7. Behavioural responses of South American fur seals to approach by tourists - a brief report

    Contributor(s):: Cassini, M. H.

    I studied the responses (retreats, threats, attacks or leaving the rookery) of South American fur seals Arctocephalus australis to tourist approaches at a non-reproductive, continental colony of located in Cabo Polonio, Uruguay (34 degrees 24'S, 53 degrees 46'W). Fur seals tolerated relatively...

  8. Dietary tryptophan supplementation in privately owned mildly anxious dogs

    Contributor(s):: Bosch, G., Beerda, B., Beynen, A. C., van der Borg, J. A. M., van der Poel, A. F. B., Hendriks, W. H.

    Food composition has been reported to influence mood and behaviour in humans and animals and it could help to reduce unwanted behaviour in dogs. Anxiety-related behaviour is associated with the functioning of the central serotonergic system and here it was investigated if dietary supplementation...

  9. Energy models of motivation: A reconsideration

    Contributor(s):: Hogan, J. A.

  10. Learning and context-specific exploration behaviour in hatchery and wild brown trout

    Contributor(s):: Adriaenssens, B., Johnsson, J. I.

    In this study we investigate whether rearing environment (wild vs. hatchery) affects the ability of brown trout parr (Salmo trutta) to learn two foraging tasks. Hatchery- and wild-reared brown trout were trained in two different foraging tasks: locating food hidden in a maze and finding a cryptic...

  11. Measuring motivation in a cichlid fish: an adaptation of the push-door paradigm

    Contributor(s):: Galhardo, L., Almeida, O., Oliveira, R. F.

    Recent behavioural, cognitive and neurophysiological studies strongly suggest that fish are capable of psychological experiences. Therefore, identifying needs from the animals' point of view is likely to be one of the best approaches to understand their welfare. Motivational tests, as a measure...

  12. Motivational trade-offs and potential pain experience in hermit crabs

    Contributor(s):: Appel, M., Elwood, R. W.

    One criterion of pain experience is that the emotional response to pain may be traded-off against other motivational requirements. This was tested in hermit crabs, housed in either preferred or unpreferred species of shells, by subjecting their abdomens to electric shocks of gradually increasing...

  13. Preference for the presence of substrate in male cichlid fish: effects of social dominance and context

    Contributor(s):: Galhardo, L., Almeida, O., Oliveira, R. F.

    Many cichlid species dig spawning pits or nests in soft bottoms and exhibit many substrate oriented activities. Despite this fact being of general knowledge, captive cichlids in laboratory and aquaculture set-ups are often kept in the absence of a soft substrate that they can manipulate. This...

  14. Quantifying stress responses induced by different handling methods in three species of fish

    Contributor(s):: Brydges, N. M., Boulcott, P., Ellis, T., Braithwaite, V. A.

    Although interest in fish welfare is growing, little research has addressed the welfare of laboratory or ornamental fish. Our aim here was to evaluate the effects of handling fish with a scoop, where the fish remained submerged in water, compared to handling with a net. We investigated the effect...

  15. Review of wallowing in pigs: description of the behaviour and its motivational basis

    Contributor(s):: Bracke, M. B. M.

    Wallowing, i.e. coating the body surface with mud, is a natural behaviour of pigs, commonly observed in feral pigs and wild boar, but rarely provided for in current housing systems for domestic pigs. Furthermore, in welfare science the subject has not been receiving much attention. This paper...

  16. The effect of moderate exercise on growth and aggression depending on social rank in groups of Arctic charr ( Salvelinus alpinus L.)

    Contributor(s):: Brannas, E.

    Several studies have shown that prolonged moderate exercise improve conditions for the farming of salmonids, by reducing aggressive interactions and resulting in enhanced growth and reduced size variation. The present study focuses on the effect of forced moderate exercise on growth and...

  17. Medieval and early modern whaling in Portugal

    Contributor(s):: Brito, C.

    Mainland Portugal is not renowned for having been a whaling nation of significance. However, preliminary studies have brought to light enough historical references to suggest that whaling occurred from at least the 13th century, and the present work identifies 38 historical sources documenting...

  18. Animal assisted therapy Part 1: Physical therapy and rehabilitation

    Contributor(s):: Reynolds, A.

  19. Effects of the interaction with dolphins on physical and mental conditions of the elderly

    Contributor(s):: Akiyama, J., Sugimoto, K., Ohta, M.

    The effects of animal-assisted therapy (AAT) on the physical and physiological health of old people have been well known. In general, dogs, cats and small animals have been used at the AAT for seniors. In this study we tried to clarify physical and mental effects of the interactions of old people...

  20. Dolphin therapy

    Contributor(s):: Gouva, E., Ergolavou, A., Paschos, I., Perdikaris, C., Nathanailides, C., Damigou, N., Athanasopoulou, F.

    Dolphin therapy emerged during the 1950s. The work of Dr. John Lilly played an important role, since he investigated the impact of dolphins on disabled people. From 1978 onwards, the therapeutic aid of dolphins was further advanced, especially after the success of Dr Davis Nathanson with...