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<p>This study aimed to assess the effectiveness of on-farm biosecurity measures in <i>Eucheuma denticulatum</i> seaweed farm, focusing on risks detection, measurement, and control. After six months of field observation, it was found that the incidence of ice-ice disease (IID) in <i>E. denticulatum</i> was influenced by the presence of epiphyte-biofilm and thallus wounds. The warm seawater temperatures and low salinity were identified as factors contributing to the susceptibility of the cultivated <i>E. denticulatum</i>. A total of 33&#xa0;kg of macroalgae-epiphytes were found covering the seaweed thallus and ropes at a farm which on-farm biosecurity measure was absent, leading to 20% reduction in farm productivity. Macroalgae-epiphyte <i>Cladophora</i> sp. has become a major epiphytic pest in the Nain Island farm that limited the growth rate up to 62% at the reference farm. Detection measured for on-farm showed that appearance of infected thalli is not always identified with pale or bleached thalli, but wounds and fewer branches of thalli attributed to an unhealthy crop. The efficacy of the on-farm biosecurity concept including removing the epiphytes and the infected crops in seaweed farm was confirmed to improve crop health and support growth performance of an average of 5.33 ± 0.9% d<sup>−1</sup>. The on-farm biosecurity measure practices were helped to reduce the effects of diseases by up to 83% in treatment farms. With these results, on-farm biosecurity measures became an adaptive mitigation strategy for dealing with unfavorable environmental factors for tropical eucheumatoid aquaculture.</p>

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Evaluation of effectiveness on-farm biosecurity measure practices to the productivity of Eucheuma denticulatum at Nain Island, Indonesia

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月4日

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  • Calvyn F. A. Sondak,
  • Robert A. Bara,
  • Fredrick D. Sangkia,
  • Cicilia S. B. Kambey

摘要

This study aimed to assess the effectiveness of on-farm biosecurity measures in Eucheuma denticulatum seaweed farm, focusing on risks detection, measurement, and control. After six months of field observation, it was found that the incidence of ice-ice disease (IID) in E. denticulatum was influenced by the presence of epiphyte-biofilm and thallus wounds. The warm seawater temperatures and low salinity were identified as factors contributing to the susceptibility of the cultivated E. denticulatum. A total of 33 kg of macroalgae-epiphytes were found covering the seaweed thallus and ropes at a farm which on-farm biosecurity measure was absent, leading to 20% reduction in farm productivity. Macroalgae-epiphyte Cladophora sp. has become a major epiphytic pest in the Nain Island farm that limited the growth rate up to 62% at the reference farm. Detection measured for on-farm showed that appearance of infected thalli is not always identified with pale or bleached thalli, but wounds and fewer branches of thalli attributed to an unhealthy crop. The efficacy of the on-farm biosecurity concept including removing the epiphytes and the infected crops in seaweed farm was confirmed to improve crop health and support growth performance of an average of 5.33 ± 0.9% d−1. The on-farm biosecurity measure practices were helped to reduce the effects of diseases by up to 83% in treatment farms. With these results, on-farm biosecurity measures became an adaptive mitigation strategy for dealing with unfavorable environmental factors for tropical eucheumatoid aquaculture.