MEPS - Vol. 306 - Feature articles

Antarctic krill (Euphausia superbba), the staple diet of many Antarctic seals, whales, fish, squid, penguins and other seabirds. Photo: ©1999 Tadashi Mizowaki/Asahi Shimbun. Used by permission

So Kawaguchi, Steven G. Candy, Robert King, Mikio Naganobu,
Stephen Nicol

 

Modelling growth of Antarctic krill. I. Growth trends with sex, length, season, and region

 

 

Steven G. Candy, So Kawaguchi

 

Modelling growth of Antarctic krill. II. Novel approach to describing the growth trajectory

 

Understanding Antarctic krill growth is one of the most important aspects for krill fishery management since it is one of the critical parameters used in the model used to manage the krill fishery—the largest fishery in the Southern Ocean. Krill growth is usually estimated through analysis of sequential length-frequency plots, and their growth trajectory is described using Von Bertalanffy growth models. This approach assumes the krill samples originate from the same population, but this is unlikely for an open ocean species. Instead, we developed an alternative new approach to describe krill growth trajectory using a step-growth function that combines experimental measurements of individual moulting krill freshly caught from the wild. We believe our new approach will contribute significantly to improvements in the ecosystem-based management of the krill fishery.

 

Inter-Research Science Center is pleased to make this Feature Article openly available for viewing by our readers.

 

Abstract I Abstract II Back to contents page Link to full PDF I Link to full PDF II