Scholarlink

<p>The use of ballan wrasse (<i>Labrus bergylta</i>) as cleaner fish in salmon aquaculture remains constrained by hatchery challenges, particularly high larval mortality and skeletal anomalies. This study investigated the impact of early weaning on larval growth, skeletal development and physiological responses over the course of a 56-day long start-feeding experiment. Four feeding protocols were tested, differing in the timing of formulated feed introduction. All groups received copepod nauplii (<i>Acartia tonsa</i>), enriched rotifers, barnacle nauplii (<i>Semibalanus balanoides</i>) and a formulated diet. Differences in weaning onset had minor effects on larval growth and mortality, and ossification followed expected developmental patterns. However, transcriptomic analyses indicated activation of immune and oxidative stress pathways following the introduction of formulated feed. Despite adequate phosphorus and mineral content in the diets, skeletal anomalies persisted, suggesting a multifactorial origin. These results highlight the importance of optimizing early-life nutrition and rearing conditions to improve larval quality and hatchery outcomes in ballan wrasse production.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The effect of different early weaning regimes on skeletal ontogeny in ballan wrasse (Labrus bergylta) larvae

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月2日

查看全文
  • Joana Pedro,
  • Maria Bergvik,
  • Charlotte Volpe,
  • Andreas Hagemann

摘要

The use of ballan wrasse (Labrus bergylta) as cleaner fish in salmon aquaculture remains constrained by hatchery challenges, particularly high larval mortality and skeletal anomalies. This study investigated the impact of early weaning on larval growth, skeletal development and physiological responses over the course of a 56-day long start-feeding experiment. Four feeding protocols were tested, differing in the timing of formulated feed introduction. All groups received copepod nauplii (Acartia tonsa), enriched rotifers, barnacle nauplii (Semibalanus balanoides) and a formulated diet. Differences in weaning onset had minor effects on larval growth and mortality, and ossification followed expected developmental patterns. However, transcriptomic analyses indicated activation of immune and oxidative stress pathways following the introduction of formulated feed. Despite adequate phosphorus and mineral content in the diets, skeletal anomalies persisted, suggesting a multifactorial origin. These results highlight the importance of optimizing early-life nutrition and rearing conditions to improve larval quality and hatchery outcomes in ballan wrasse production.