Impact of cephalopods in the food chain and their interaction with the environment and fisheries: an overview

By U. Piatkowski, M. M. D. Cunha, Graham J. Pierce, P. Boyle, E. Hatfield. 2001

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Assessing the trophic position and ecological role of squids in marine ecosystems by means of food-web models (2013, background): “For example, in the Falkland Islands, flying squids, Martialia hyadesi, are the main prey of the king penguins Aptenodytes patagonicus and thus the commercial fishery targeting this squid can potentially indirectly impact the king penguins (Piatkowski et al., 2001b).”
A review of cephalopod–environment interactions in European Seas (2008, background): “The abundance and distribution of the world’s commercial cephalopod stocks present wide annual fluctuations, generally attributed to the species’ short life cycles, characterized by non-overlapping generations and consequent lack of buffering of the population from the influence of varying environme”
Inter-specific and ontogenic differences in δ13C and δ15N values and Hg and Cd concentrations in cephalopods (2011, unknown): “Such a consideration is very important as cephalopods are both active predators and prey, and thus constitute an important link within food webs (Piatkowski et al. 2001).”