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<p>The development of reliable larval rearing techniques and protocols is essential knowledge to promote any stock enhancement initiative based on the production of new individuals. This study evaluated three low-cost container designs—bottom-meshed, modified-planktonkreisel, and buckets—for mass culture of centolla (<i>Lithodes santolla</i>) larvae from Zoea 1 to Megalopa. Larval survival to Megalopa (24&#xa0;days) exceeded 55% in bottom-meshed and modified-planktonkreisel containers, outperforming buckets (~ 20%). The modified-planktonkreisel achieved optimal performance at 240 larvae·L<sup>−1</sup>, yielding 1536 megalopae per container with minimal daily labor, requiring only 2.6&#xa0;min of maintenance per container. Density-dependent mortality was primarily observed in modified-planktonkreisel containers. Under hatchery conditions comparable to those in this study, our utilization strategy estimates that a starting pool of 40 ovigerous females could produce ~ 90,000–104,000 megalopae annually in recirculating aquaculture systems (RAS) using bottom-meshed or modified-planktonkreisel containers, respectively. Beyond the ~ 15% increase in production output achieved with the modified-planktonkreisel containers, this model offers superior operational advantages, particularly in reducing labor requirements. These results confirm the scalability of this approach for stock enhancement programs targeting not only <i>L. santolla</i> but potentially other commercially important crustacean species.</p>

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Large-scale rearing of southern king crab (Lithodes santolla) larvae for stock enhancement initiatives

  • 期刊论文

  • 发表日期：

    2026年4月21日

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  • M. Paula Sotelano,
  • M. Belén Reartes,
  • M. Carolina Romero,
  • Gustavo A. Lovrich,
  • Olga Florentín,
  • Ariel Giamportone,
  • Federico Tapella

摘要

The development of reliable larval rearing techniques and protocols is essential knowledge to promote any stock enhancement initiative based on the production of new individuals. This study evaluated three low-cost container designs—bottom-meshed, modified-planktonkreisel, and buckets—for mass culture of centolla (Lithodes santolla) larvae from Zoea 1 to Megalopa. Larval survival to Megalopa (24 days) exceeded 55% in bottom-meshed and modified-planktonkreisel containers, outperforming buckets (~ 20%). The modified-planktonkreisel achieved optimal performance at 240 larvae·L−1, yielding 1536 megalopae per container with minimal daily labor, requiring only 2.6 min of maintenance per container. Density-dependent mortality was primarily observed in modified-planktonkreisel containers. Under hatchery conditions comparable to those in this study, our utilization strategy estimates that a starting pool of 40 ovigerous females could produce ~ 90,000–104,000 megalopae annually in recirculating aquaculture systems (RAS) using bottom-meshed or modified-planktonkreisel containers, respectively. Beyond the ~ 15% increase in production output achieved with the modified-planktonkreisel containers, this model offers superior operational advantages, particularly in reducing labor requirements. These results confirm the scalability of this approach for stock enhancement programs targeting not only L. santolla but potentially other commercially important crustacean species.