Three years without commercial fishing produced detectable gains in the Yangtze. Yet biomass, diversity and lasting ecosystem recovery do not move on one timetable.
Health records, life stage, quarantine barriers and release evidence matter more than a fixed waiting period when a new zebrafish line reaches a facility.
Cross-aquarium behavioural monitoring needs a shared ethogram, reliable observers and contextual data before husbandry practices can be compared safely.
When antibiotics fail on a fish farm, reassess diagnosis, true exposure, water and susceptibility results before choosing second-line treatment safely.
A national study in China associates freshwater oxygen recovery with reduced nutrients and organic pollution despite warming, informing the design of monitoring programmes.
Six anaesthetics tested in larval zebrafish affect brain, heart and behaviour differently. Protocols should match the scientific endpoint and welfare need.
Tracking five aquarium-released sawfish shows why survival, movement, habitat use and predation risk require distinct measures after release over time.
Zebrafish egg disinfection can reduce selected introduction risks, but disinfectant, water, embryo age and rinsing all affect tolerance and performance.
Autolysis and contamination quickly erode sample quality after a fish dies. Public aquariums can protect diagnostic value with a prepared necropsy plan.
A convenient score may not measure the intended welfare state. Recent research offers a practical route to validating indicators in aquatic facilities.
