Disparate estimates of intrinsic productivity for Antarctic krill across small spatial scales under a rapidly changing ocean.

ABSTRACT: Understanding the spatio-temporal dynamics of Antarctic krill (Euphausia superba) productivity along the Western Antarctic Peninsula (WAP) requires the application of robust analytical approaches. Both design-based and model-based methodologies have been employed to address this challenge. The Spawning Potential Ratio (SPR) is a indicator that provides valuable insights about population productivity. In this study, we analyzed the spatial and temporal variability of the SPR for krill by modeling Length-Based Spawning Potential Ratio (LBSPR) with 20 years of fishery-dependent length composition data. Results showed spatial and temporal heterogeneity among five fishing strata in the WAP, where SPR in Gerlache Strait stratum was consistently lower than the 20% SPR reference point, compared wi

SUBMITTER: Mardones M 

PROVIDER: S-EPMC12857959 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature