Fish

Life beyond a jar: Effects of tank size and furnishings on the behaviour and welfare of Siamese fighting fish (Betta splendens)

Globally, Siamese fighting fish (Betta splendens) continue to be sold and kept in small, barren jars or tanks, with little concern for their welfare. This study aimed to examine the impact of housing size and furnishings (i.e. live plants, refuges)...

Year Published: 2024Topics: Environmental Enrichment, HousingAnimal Type: Fish, Other Fish

Citation: Clark-Shen, N., Tariel-Adam, J., Gajanur, A. et al. 2024. Life beyond a jar: Effects of tank size and furnishings on the behaviour and welfare of Siamese fighting fish (Betta splendens). Animal Welfare 33, e62.

Zebrafish maintenance conditions affect behavioral and biochemical biomarkers: A possible interfering factor on the research results

Over the years, scientific research with fish models has grown at a rapid pace, and issues such as animal welfare are becoming increasingly important in various areas of animal husbandry and experimentation. Here, we evaluated whether Danio rerio behavior is...

Year Published: 2024Topics: Environmental EnrichmentAnimal Type: Fish, Zebrafish

Citation: Amaral, F. U. I., Pompermaier, A., Almeida, P. A. de et al. 2024. Zebrafish maintenance conditions affect behavioral and biochemical biomarkers: A possible interfering factor on the research results. Zebrafish.

Structural enrichment promotes natural behaviour and welfare of captive gilthead seabream broodstock

The intensification of aquaculture practices in the last decade can compromise the welfare of farmed fish. However, one strategy to be considered to improve the welfare of captive fish is the implementation of structural enrichment in the rearing environment. The...

Year Published: 2024Topics: Environmental EnrichmentAnimal Type: Fish, Other Fish

Citation: Oliveira, A. R., Cabrera-Álvarez, M. J., Soares, F. et al. 2024. Structural enrichment promotes natural behaviour and welfare of captive gilthead seabream broodstock. Applied Animal Behaviour Science 275, 106289.

Effects of handling and surgical implant on juvenile wild trout: Physiological and behavioral impact

Fish involved in telemetry studies are usually handled, anaesthetized, and subjected to internal tag implantation, all of which have the potential to disrupt the fish's physiology, migratory patterns, food-seeking behavior, growth, and survival. As fish tagging is a widespread standard...

Year Published: 2024Topics: Biological Sampling & Physiological Measurement, HandlingAnimal Type: Fish, Trout

Citation: Makaras, T., Stankevičiūtė, M. 2024. Effects of handling and surgical implant on juvenile wild trout: Physiological and behavioral impact. Journal of Fish Biology 105(1), 265–278.

Effects of housing density on anxiety-like behavior of zebrafish in the plus maze with ramp

Population density in experimental animals is a crucial factor in maintaining the wellbeing of the organisms. Inadequate housing conditions can compromise the validity and reliability of research results, making comparisons between studies difficult. In sociable species such as zebrafish (Danio...

Year Published: 2024Topics: Stocking DensityAnimal Type: Fish, Zebrafish

Citation: Pessoa, R., Motta, C., Araujo-Pessoa, E. et al. 2024. Effects of housing density on anxiety-like behavior of zebrafish in the plus maze with ramp. Behavioural Processes 222, 105114.

Heart and shoal: Social cues and oxytocin receptors impact stress recovery in the zebrafish

In many species, social interactions decrease behavioral, hormonal, and neural responses to environmental stressors. While “social buffering” and its mechanisms have received considerable attention in mammals, we know less about the phenomenon in fish. The nonapeptide oxytocin regulates social behavior...

Year Published: 2024Topics: Social Housing & CompanionshipAnimal Type: Fish, Zebrafish

Citation: Wilson, L. C., Riordan, A., Nussbaum, A. et al. 2024. Heart and shoal: Social cues and oxytocin receptors impact stress recovery in the zebrafish. Physiology & Behavior 283, 114613.

Improving effectiveness of environmental enrichment: The role of light intensity in rock bream (Oplegnathus fasciatus) rearing

Environmental enrichment is a potential approach to enhance the fitness and survival of hatchery fish stocked for conservation purposes. Its effectiveness presumably depends not only on ecologically relevant features of physical enrichment but also on light condition applied. Despite the...

Year Published: 2024Topics: Environmental Enrichment, Husbandry & ManagementAnimal Type: Fish, Other Fish

Citation: Li, Z., He, J., Zhou, S. et al. 2024. Improving effectiveness of environmental enrichment: The role of light intensity in rock bream (Oplegnathus fasciatus) rearing. Applied Animal Behaviour Science 281, 106421.

Early rearing of European seabass (Dicentrarchus labrax) with mild current enrichment modifies fish swimming behavior without altering their growth performance

The implementation of conditions that favor optimum swimming activity (e.g., suitable flow regimes), has been associated with enhanced growth and improved welfare in some farmed fish species. Despite the importance of European seabass in aquaculture, the potential beneficial effects of...

Year Published: 2025Topics: Environmental EnrichmentAnimal Type: Fish, Other Fish

Citation: Magnoni, L. J., Cousin, X., Leguen, I. et al. 2025. Early rearing of European seabass (Dicentrarchus labrax) with mild current enrichment modifies fish swimming behavior without altering their growth performance. Physiology & Behavior 289, 114742.

Puzzle feeder as a cognitive enrichment strategy determines long-term welfare improvements in a teleost fish

Providing access to cognitive tasks, such as puzzle feeders, holds promise as enrichment strategy to enhance the welfare of captive animals. Despite the substantial number of teleost fish in captivity, the effects of cognitive enrichments in this group remain relatively...

Year Published: 2024Topics: Environmental Enrichment, Husbandry & ManagementAnimal Type: Fish, Zebrafish

Citation: Gatto, E., Varracchio, C., Bertolucci, C. et al. 2024. Puzzle feeder as a cognitive enrichment strategy determines long-term welfare improvements in a teleost fish. Applied Animal Behaviour Science 279, 106401.

Fin clipping does not increase opercular beat rate in tricaine-treated zebrafish

To carry out research with genetically modified animals, their genotype has to be assessed. A standard protocol to obtain required tissue samples from zebrafish is finclipping. However, some studies reported considerable stress induced by this protocol. We therefore assessed ventilation...

Year Published: 2024Topics: Body Modification/MutilationAnimal Type: Fish, Zebrafish

Citation: Burkhalter, M. D., Philipp, M. 2024. Fin clipping does not increase opercular beat rate in tricaine-treated zebrafish. Laboratory Animals 58(6), 616–620.