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  1. Observing Live Fish Improves Perceptions of Mood, Relaxation and Anxiety, But Does Not Consistently Alter Heart Rate or Heart Rate Variability

    Contributor(s):: Gee, N. R., Reed, T., Whiting, A., Friedmann, E., Snellgrove, D., Sloman, K. A.

  2. Effects of food quantity and distribution on aggressive behaviour of gilthead seabream and European seabass

    Contributor(s):: Oikonomidou, Eleni, Batzina, Alkisti, Karakatsouli, Nafsika

    In intensive aquaculture, aggression among fish creates a disturbed social environment and leads to serious implications. Food is a resource of great importance for fish and its acquisition is an important enough reason for increased competition. Gilthead seabream Sparus aurata and European...

  3. Effects of familiarity on individual growth and feeding behaviour of European seabass Dicentrarchus labrax

    Contributor(s):: Batzina, Alkisti, Drossos, Ioannis-Panagiotis, Karakatsouli, Nafsika

    Available literature indicates that fish are able to recognize familiar conspecifics and that familiarity may offer important benefits (e.g. more stable social environment, improved foraging behavior, growth, survival). In the practice of intensive rearing of European seabass Dicentrarchus labrax...

  4. A novel emotional and cognitive approach to welfare phenotyping in rainbow trout exposed to poor water quality

    Contributor(s):: Colson, V., Mure, A., Valotaire, C., Le Calvez, J. M., Goardon, L., Labbé, L., Leguen, I., Prunet, P.

    Recent scientific evidence for fish sentience has stressed the need for novel sentience-based detection tools of fish welfare impairment in commercial farms. In order to mimic a well-characterised stress situation, rainbow trout (Oncorhynchus mykiss) were exposed to poor water quality (hypoxia...

  5. Is personality of young fish consistent through different behavioural tests?

    Contributor(s):: Colchen, Tatiana, Faux, Elodie, Teletchea, Fabrice, Pasquet, Alain

    Most studies carried out on personality recognized that personality is defined by behavioural traits consistent through time and/or contexts. In fish, most studies on personality were performed either on juveniles (aged between 6months and 1year) or adults, but very few focused on the early life...

  6. Exploring the efficacy of immersion analgesics in zebrafish using an integrative approach

    Contributor(s):: Schroeder, Paul G., Sneddon, Lynne U.

    Home Office guidelines recommend the use of analgesics for all protected species, including fish during scientific procedures likely to result in pain, suffering, distress and lasting harm. In larger fish species some drugs have shown efficacy in terms of perioperative analgesia when administered...

  7. Effects of culture densities on feed demand, behavioural tests and on the hepatic and cerebral oxidative status in tilapia (Oreochromis sp.)

    Contributor(s):: Sánchez-Muros, María J., Sánchez, Belén, Barroso, Fernando G., García-Mesa, Sergio, Rufino-Palomares, Eva E., Lupiáñez, José A., Sanz, Ana

    The present study examines whether fish density affects behavioural tests, feed demand, and different parameters indicative of the oxidative status of the liver and brain of Orechromis sp. to identify welfare indicators for fish culturing. The fish were maintained at two commercial densities (5.6...

  8. Cannibalism management of jundiĆ” fry, Rhamdia quelen: Behavior in heterogeneous batches fed on food with different particle sizes

    Contributor(s):: Costenaro-Ferreira, Cristiano, Oliveira, Rodrigo R. B., Oliveira, Paulo L. S., Hartmann, Gustavo J., Hammes, Fernanda B., Pouey, Juvêncio L. O. F., Piedras, Sérgio R. N.

    Fish reared in heterogeneous batches and fed on food with a very small particle size can practice cannibalism, because it is energetically more feasible. JundiĆ” is an omnivorous fish that exhibits heterogeneous growth and high cannibalism rate (CR) in the early stages of its life. Thus, to...

  9. The behavioural effects of supplementing diets with synthetic and naturally sourced astaxanthin in an ornamental fish (Puntius titteya)

    Contributor(s):: Eaton, Lewis, Clezy, Kristian, Snellgrove, Donna, Sloman, Katherine

    Carotenoids are routinely incorporated into ornamental fish diets with the aim of enhancing companion fish colouration which may concomitantly affect fish behaviour. Previously, colour enhancement has typically been achieved using synthetic carotenoids, however, there is now growing public demand...

  10. Behaviour of proactive and reactive tilapia Oreochromis niloticus in a T-maze

    Contributor(s):: Mesquita, Flávia O., Torres, Isabela F. A., Luz, Ronald K.

    Knowing that individuals with different coping strategies can exhibit different behaviours in associative learning, we evaluated the learning capacity of proactive and reactive tilapia fish. Trained and untrained, proactive and reactive, tilapia were subjected to a T-maze and their behaviour...

  11. Is a cannibal different from its conspecifics? A behavioural, morphological, muscular and retinal structure study with pikeperch juveniles under farming conditions

    Contributor(s):: Colchen, T., Gisbert, E., Ledoré, Y., Teletchea, F., Fontaine, P., Pasquet, A.

    Cannibalism is defined as the act of killing and consuming the whole, or major part, of an individual belonging to the same species, irrespective of its stage of development. Intra-cohort cannibalism in fish larval or juvenile stages, which is a major economic problem, has been widely studied in...

  12. Impact of environmental enrichment and social group size in the aggressiveness and foraging activity of Serrapinnus notomelas

    Contributor(s):: da Silva, Alexandre, Lima, Marcos R., Meletti, Paulo C., Jerep, Fernando C.

    Fish are widely used in scientific research, and many species are bred for ornamental purposes and human consumption. Despite the large number of fish kept in captivity, research on the welfare of these animals has only recently intensified. One commonly used method for improving fish welfare is...

  13. How a handful of fishing villages sparked a marine conservation revolution | Alasdair Harris

    Full-text: Available

    | Contributor(s):: Alasdair Harris

    We need a radically new approach to ocean conservation, says marine biologist and TED Fellow Alasdair Harris. In a visionary talk, he lays out a surprising solution to the problem of overfishing that could both revive marine life and rebuild local fisheries -- all by taking less from the ocean....

  14. Effect of environmental color on learning of Nile tilapia

    | Contributor(s):: Torres, Isabela F. Araújo, Ferreira, Angélica da Silva, de Souza e Silva, Walisson, Mesquita, Flávia O., Luz, Ronald K.

    This study investigates the effects of environmental color on learning capacity of Nile tilapia, Oreochromis niloticus. Eighty-four tilapia (12.81 +/- 0.38 cm; 35.98 +/- 8.33 g), were separated into six groups of fourteen and housed in blue, green and black tanks. The fish were acclimatized to...

  15. Zebrafish welfare: Natural history, social motivation and behaviour

    | Contributor(s):: Graham, Courtney, von Keyserlingk, Marina A. G., Franks, Becca

    Zebrafish are now one of the most used animal model species in scientific research worldwide. Our current knowledge of wild zebrafish is limited to an estimated range of their natural habitats and their tendencies to form groups. In laboratories, zebrafish are typically housed in situations that...

  16. Free-choice exploration increases affiliative behaviour in zebrafish

    | Contributor(s):: Graham, Courtney, von Keyserlingk, Marina A. G., Franks, Becca

    Cognitive stimulation has been shown to be rewarding and capable of eliciting positive emotions in several species. In contrast to the abundant learning and exploration opportunities available in nature, captive environments can be under-stimulating-with the potential to induce anhedonia and...

  17. Less water renewal reduces effects on social aggression of the cichlid Pterophyllum scalare

    | Contributor(s):: Gauy, Ana Carolina dos Santos, Boscolo, Camila Nomura Pereira, Gonçalves-de-Freitas, Eliane

    Changes in aquatic environments can affect fish behavior. Water renewal, for example, can dilute chemical signals, which are a social communication tool used by some fish species, and this dilution increases aggressive interactions in the group. Fierce and prolonged fights can affect fish welfare...

  18. Artificial Neural Network (ANN) as a Tool to Reduce Human-Animal Interaction Improves Senegalese Sole Production

    | Contributor(s):: Martinez-Vazquez, J. M., Valcarce, D. G., Riesco, M. F., Sanz Marco, V., Matsuoka, M., Robles, V.

  19. Moving With Pets

    | Contributor(s):: Dylan Kaarlsen

    When you go new places® every member of your family should be at ease. Cats, dogs and other animals are especially sensitive to moving. The secret to pet relocation is planning. Follow these pointers and ask your Atlas Agent if you have questions. This guide will help prepare you to move...

  20. METHODS FOR MULTISPECIES ANTHROPOLOGY: Thinking with Salmon Otoliths and Scales

    | Contributor(s):: Swanson, Heather Anne