Bony fishes receive little attention in several zoo and aquarium journals. A literature analysis published in 2023 argues for better behavioural evidence, while a publication gap must not be mistaken for proof of poor welfare.
Injured trout can carry more Saprolegnia parasitica DNA without visible cotton-like growth. A 2022 study helps separate pathogen detection from tissue disease and clinical risk, while providing no treatment threshold.
Lake Geneva’s 2024 monitoring combined sediment grabs and lake-bed images. Quagga mussel distribution varied strongly with depth, but two surveys cannot establish the invasion’s long-term trajectory or describe areas outside the sampling frame.
A tighter shoal does not by itself demonstrate better welfare. A 2025 study links temperature to the organisation of small zebrafish groups, with responses differing between measures and observation periods.
Mnemiopsis leidyi may go unnoticed even where it occurs. A July 2020 survey of French Gulf of Lion lagoons illustrates the value of combining sightings with documented sampling, and why a non-detection is not proof of absence.
A 2025 experiment reduced fish-pathogenic bacteria using plasma combined with cavitation. The tests involved bacterial suspensions; fish safety, biofilter compatibility and performance in operating farms still need assessment.
A feeding aggregation does not describe how sharks use an exhibit throughout the day. Field research from Moorea supports observations outside feeding periods, while keeping reef findings separate from evidence about aquarium collections.
Unusual skin shedding in Xenopus laevis can accompany cutaneous capillariasis. Shed skin and histology can contribute to the diagnostic investigation; redness or a bacterial culture alone does not identify the underlying cause.
Disinfecting cysts does not make a hatchery sterile. Useful checks distinguish contamination control, preservation of hatching performance and removal of residual chlorine before incubation.
A Centre Scientifique de Monaco study tests antioxidant delivery to Stylophora pistillata through enriched Artemia. Physiological responses support further investigation, while differences between endpoints limit immediate use across aquarium collections.
Marbled crayfish can reproduce without fertilisation. A single observation therefore calls for reliable identification, site records and prevention of transfers, rather than an initial search for a breeding pair.
In Xenopus laevis, clasping alone establishes neither a partner’s sex nor breeding success. Recording contact and vocal exchanges helps describe behaviour without treating every interaction as a measure of fertility.
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