Looking for environmental drivers of blue whiting recruitment in the Porcupine Bank (NE Atlantic)
Authors
Baldó, F. (Francisco); Chowdhury, M. (Masuma); González-Nuevo, G. (Gonzalo); Velasco, F. (Francisco); Laiz, I. (Irene)Date
2021Type
posterAbstract
Although temporal and spatial match and mismatch of sh larvae with their potential prey
organisms is considered the main factor regulating the year-class strength in marine sh populations,
di erent environmental forcings also in
uence the survival rate of larvae and therefore recruitment.
In 2020, the highest abundance of year-class recruits (total lenght < 20 cm) of Micromesistius
poutassou was observed in the record of the Spanish Bottom Trawl Survey on the Porcupine Bank
(September) from 2001-2020. Various environmental parameters, namely chlorophyll concentration,
surface salinity, temperature, ocean currents, and wind data were used to study their potential
impact on the blue whiting eggs and larvae survival. Our results showed that in 2020, during
the blue whiting-spawning season (March-April), the calm wind situation along with weaker ocean
currents above the Porcupine Bank helped to accumulate phytoplankton biomass, thus promoting
secondary productivity. The optimal ...
The following license files are associated with this item: