A small PIT transponder does not guarantee that marking is without effects. A 2020 meta-analysis in juvenile salmonids helps assess tag-to-fish length, growth and mortality, while leaving important uncertainties for field programmes.
Artificial sturgeon breeding requires coordinated checks on broodstock, gametes and incubation equipment. FAO manuals support that planning, while species, maturity and system design determine whether a particular procedure applies.
A ciliate in a Xenopus laevis urinary bladder does not automatically explain skin lesions. A 2013 case report illustrates why localisation, tissue response and other diagnostic findings need to be assessed together.
Two Triaenodon obesus births documented at AquaRio illustrate how observations, individual records and ultrasound can support reproductive monitoring. The 2022 report informs planning without establishing a universal gestation timetable or treatment protocol.
A seven-stage key helps aquarium teams follow development inside greater spotted catshark egg cases. It provides observation markers, rather than a deadline for assisted opening.
A fish recovered alive just below a dam does not reveal its complete outcome. A systematic review shows why passage route, injury, delayed follow-up and procedural effects need separate assessment.
Reduced appetite alone does not identify SAV. In Atlantic salmon, group history, tissue examination and viral RNA testing need to be interpreted together to investigate poor performance.
Filtered water, detritus and faeces reveal different aspects of zebrafish facility health. An experimental comparison helps teams select specimens and define what a result can establish.
Baffles can improve small fish passage in some culverts, but lower average water velocity does not establish success. Assessment needs to connect access, a usable route and biological monitoring.
France’s internal animal welfare body advises staff and follows projects. In aquatic facilities, useful oversight connects observations, advice, decisions and follow-up while keeping institutional and legal responsibilities clear.
Survival after capture or transfer does not establish that a crab or lobster has recovered. Repeated observations should connect physical condition, behaviour and water conditions without relying on a universal welfare marker.
High rotifer numbers do not establish that a batch is suitable for larvae. Prey size, recent feeding, enrichment and the route through the hatchery all need checking before delivery.
