Review of biology and fisheries of splendid alfonsino Beryx splendens, especially in the Emperor seamounts area

We review biology and fisheries of splendid alfonsino Beryx splendens, with special reference to the Emperor seamounts area, to facilitate discussion in NPFC SSC-BF. First, previous studies on taxonomy, biogeography, diet, reproduction, life history and stock structure of splendid alfonsino are summarized. Then we overview the history, current status and regulations of exploitation of this fish stock. The previous stock assessment by Japan is also reviewed and criticized. To provide a preliminary diagnosis of stock status, an analysis of body size composition among catch is also presented, suggesting a considerable downsizing.