translate English to French: However, the authors acknowledged that the resolution of this survey was weak for this species (i.e. wide confidence limits) because few gulls were actually observed during the surveys, and that the results were extrapolated over the entire survey region.
Burger et Gochfeld, 1996), les résultats indiquent pourtant que les eaux marines au Canada accueillent une grande partie de la population mondiale pendant certains hivers.