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Seasonality, sex ratio, spawning frequency and sexual maturity of the opakapaka Pristipomoides filamentosus (Perciformes: Lutjanidae) from the Main Hawaiian Islands: fundamental input to size-at-retention regulations

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The crimson jobfish Pristipomoides filamentosus (locally known as ‘opakapaka’ in Hawaii) is a deep-water eteline lutjanid that supports important commercial and recreational fisheries in Hawaii and throughout much of the… Click to show full abstract

The crimson jobfish Pristipomoides filamentosus (locally known as ‘opakapaka’ in Hawaii) is a deep-water eteline lutjanid that supports important commercial and recreational fisheries in Hawaii and throughout much of the Indo-Pacific region. It is one of the most commonly caught species of the ‘Deep-7’ bottomfish species complex in the commercial bottomfish fishery of Hawaii. However, there are currently no validated estimates of median body sizes at sexual maturity that can be used in a comprehensive evaluation of the species’ stock status within Hawaiian bottomfish fisheries. Herein we provide size-at-maturity estimates for the species in the main Hawaiian Islands: median length at maturity of 40.7-cm fork length (FL; 95% confidence interval (CI) 40.3–41.2cm) for females and 34.3cm FL (95% CI 33.3–35.3cm) for males, with respective equivalent median weight-at-maturity estimates of ~1.17 and ~0.70kg (2.58 and 1.55 lb). We suggest these newly available data be seriously considered in any future evaluations of minimum size regulations, currently set at ~0.45kg (1 lb) regardless of sex, for the species’ fisheries in Hawaii.

Keywords: hawaiian islands; sexual maturity; size; maturity; pristipomoides filamentosus; main hawaiian

Journal Title: Marine and Freshwater Research
Year Published: 2017

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