0000000000471526
AUTHOR
D. Spatafora
Ocean acidification affects fish spawning but not paternity at CO2 seeps
Fish exhibit impaired sensory function and altered behaviour at levels of ocean acidification expected to occur owing to anthropogenic carbon dioxide emissions during this century. We provide the first evidence of the effects of ocean acidification on reproductive behaviour of fish in the wild. Satellite and sneaker male ocellated wrasse ( Symphodus ocellatus ) compete to fertilize eggs guarded by dominant nesting males. Key mating behaviours such as dominant male courtship and nest defence did not differ between sites with ambient versus elevated CO 2 concentrations. Dominant males did, however, experience significantly lower rates of pair spawning at elevated CO 2 levels. Despite the hig…
Impiego dei BRUV (Baited Remote Underwater Video) per la valutazione del popolamento ittico nell'area marina protetta Capo Gallo-Isola delle Femmine (Palermo)
A Baited Remote Underwater Video (BRUV) system was used to assess fish assemblages on detritic bottoms (40 m) inside and outside the Capo Gallo - Isola delle Femmine MPA. Our study investigated the suitability of Baited Remote Underwater Video to describe fish (relative) abundance and diversity between sites at different protection levels. The fish assemblages relative abundance and species richness significantly differed between the three different location (A, B e CTL) considered. The largest difference occurred at CTL site position outside the MPA, where 2-fold increase in the number of species was recorded relative to the A and B sites.