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Non-invasive measurement of steroids in fish-holding water: Important considera...
Scott, Alexander P.; Hirschenhauser, Katharina; Bender, Nicole; Oliveira, Rui Filipe; Earley, Ryan L.; Sebire, Marion; Ellis, Tim; Pavlidis, MichaelFish behaviourists are increasingly turning to non-invasive measurement of steroid hormones in holding water, as opposed to blood plasma. When some of us met at a workshop in Faro, Portugal, in September, 2007, we realised that there were still many issues concerning the application of this procedure that needed resolution, including: Why do we measure release rates rather than just concentrations of steroids i...
Male urine signals social rank in the Mozambique tilapia (Oreochromis mossambic...
Barata, Eduardo N.; Hubbard, Peter C.; Almeida, Olinda G.; Miranda, António; Canário, Adelino V.M.Background The urine of freshwater fish species investigated so far acts as a vehicle for reproductive pheromones affecting the behaviour and physiology of the opposite sex. However, the role of urinary pheromones in intra-sexual competition has received less attention. This is particularly relevant in lek-breeding species, such as the Mozambique tilapia (Oreochromis mossambicus), where males establish dominanc...
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