Cormorant catch concerns for fishers: estimating the size-selectivity of a piscivorous bird.

Cormorant catch concerns for fishers: estimating the size-selectivity of a piscivorous bird.

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Conflict arises in fisheries worldwide when piscivorous birds target fish species of commercial value.This paper presents a method for here estimating size selectivity functions for piscivores and uses it to compare predation selectivities of Great Cormorants (Phalacrocorax carbo sinensis L.1758) with that of gill-net fishing on a European perch (Perca fluviatilis L.

1758) population in the Curonian Lagoon, Lithuania.Fishers often regard cormorants as an unwanted "satellite species", but the degree of direct competition and overlap in size-specific selectivity between fishers and cormorants is Stash Cans unknown.This study showed negligible overlap in selectivity between Great Cormorants and legal-sized commercial nets.

The selectivity estimation method has general application potential for use in conjunction with population dynamics models to assess fish population responses to size-selective fishing from a wide range of piscivorous predators.