Fish

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.

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.

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.

Comprehensive husbandry protocol for Corydoras catfish and many other Amazonian species

A variety of fish species have proven instrumental in the investigation of evolution, behavior, ecology, and physiology, among many other fields. Many model systems (e.g., zebrafish, guppies, and three-spined sticklebacks) have been maintained by institutions and have had protocols written...

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

Citation: Chiang, A., Haine, S. S. S., Goldring, R. et al. 2024. Comprehensive husbandry protocol for Corydoras catfish and many other Amazonian species. JAALAS 63(5), 472–479.

Exploring enrichment enjoyed by Zebrafish

Many studies highlighted that gravel is a preferred enrichment of zebrafish, therefore we were keen to explore this anecdotal evidence further, to ascertain if the spatial distribution of the zebrafish was significantly linked to the presence of physical enrichment within...

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

Citation: Waghorn, N. 2024, April. Exploring enrichment enjoyed by Zebrafish. Animal Technology and Welfare 23(1), 64–65.

Novel development of magnetic resonance imaging to quantify the structural anatomic growth of diverse organs in adult and mutant zebrafish

Zebrafish (Danio rerio) is a widely used vertebrate animal for modeling genetic diseases by targeted editing strategies followed by gross phenotypic and biomarker characterization. While larval transparency permits microscopic detection of anatomical defects, histological adult screening for organ-level defects remains...

Year Published: 2024Topics: Imaging & Electrophysiological RecordingAnimal Type: Fish, Zebrafish

Citation: Sharma, S., Magnitsky, S., Reesey, E. et al. 2024. Novel development of magnetic resonance imaging to quantify the structural anatomic growth of diverse organs in adult and mutant zebrafish. Zebrafish 21(1), 28–38.

Life in a fishbowl: Space and environmental enrichment affect behaviour of Betta splendens

The public has expressed growing concern for the well-being of fishes, including popular pet species such as the Siamese fighting fish (Betta splendens). In captivity, male Bettas behave aggressively, often causing injuries and death if housed together. As a result,...

Year Published: 2024Topics: Environmental Enrichment, Housing, Social Housing & CompanionshipAnimal Type: Fish, Other Fish

Citation: Oldfield, R. G., Murphy, E. K. 2024. Life in a fishbowl: Space and environmental enrichment affect behaviour of Betta splendens. Animal Welfare 33, e1.

The effects of different feed ration levels on growth, welfare rating, and early maturation in juvenile Atlantic salmon (Salmo salar)

To investigate the possible effect of different feed ration levels on the growth, welfare, and early maturation of juvenile Atlantic salmon, 450 salmon parr with a mean (±standard error) initial weight of 51.6 g (±0.8) were reared in triplicate under...

Year Published: 2024Topics: Husbandry & ManagementAnimal Type: Fish, Salmon

Citation: Imsland, A. K. D., Methúsalemsson, H. 2024. The effects of different feed ration levels on growth, welfare rating, and early maturation in juvenile Atlantic salmon (Salmo salar). Fishes 9(2), 70.

The influence of water nitrate concentration combined with elevated temperature on rainbow trout Oncorhynchus mykiss in an experimental aquaponic setup

Intensive recirculating systems are a fast-developing sector of aquaculture. While several warm-water fish have been reared in aquaponics, almost no data are available for cold-water species. The determination of nitrate toxicity thresholds in recirculating aquaculture is crucial. Different pollutants are...

Year Published: 2024Topics: Husbandry & ManagementAnimal Type: Fish, Trout

Citation: Papadopoulos, D. K., Lattos, A., Chatzigeorgiou, I. et al. 2024. The influence of water nitrate concentration combined with elevated temperature on rainbow trout Oncorhynchus mykiss in an experimental aquaponic setup. Fishes 9(2), 74.

Eugenol as anesthetic for Cnesterodon decemmaculatus (Cyprinodontiformes, Poeciliidae)

Anesthetics are commonly used in fish for surgery and to facilitate capture, handling and transport in aquaculture and experimental procedures. In research, the selection of the anesthetic depends on its properties and on the recovery time. Eugenol has been pointed...

Year Published: 2024Topics: Anesthesia & SedationAnimal Type: Fish, Other Fish

Citation: Vercellini, M. C., Rearte, R., di Cesare, L. et al. 2024. Eugenol as anesthetic for Cnesterodon decemmaculatus (Cyprinodontiformes, Poeciliidae). Laboratory Animals 58(1), 44–51.