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<p>In this study, up- and downstream movements of <i>Capoeta damascina</i> around Cataloluk Small Hydropower Plant (SHPP) in the Tekir stream, a 27&#xa0;km-long small tributary of the Ceyhan River in the eastern Mediterranean region of Turkey, were assessed by using a radio telemetry method. The fish tracking data revealed that the Cataloluk vertical slot fishway has high attraction and passage efficiency. However, the absence of a downstream fish guidance structure trapped 75% of the <i>C. damascina</i> individuals that ascended the fishway in the Cataloluk reservoir, and those individuals did not migrate further upstream due to the lack of fishway at Kısık Weir. On the other hand, remaining individuals moved downstream of the Cataloluk Dam; 12.5% of individuals remained stationary in the pool habitat at inadequate environmental flow in the bypassed reach, and others moved to Sucatı Reservoir. We found that a fish’s core home range, where it spent 50% of its time during the tracking period, corresponds to 11% of the length of the Tekir stream. These results provide valuable insights into the movement patterns and habitat use of <i>C. damascina</i> in hydropower-regulated rivers, which may inform future management strategies for fish passage and habitat conservation in similar ecosystems.</p>

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Movements of mesopotamian barb (Capoeta damascina) in a river stretch impacted by small hydropower operations in Ceyhan River Basin, Turkey

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Serhat Kucukali,
  • Ahmet Alp,
  • Adil Akyüz

摘要

In this study, up- and downstream movements of Capoeta damascina around Cataloluk Small Hydropower Plant (SHPP) in the Tekir stream, a 27 km-long small tributary of the Ceyhan River in the eastern Mediterranean region of Turkey, were assessed by using a radio telemetry method. The fish tracking data revealed that the Cataloluk vertical slot fishway has high attraction and passage efficiency. However, the absence of a downstream fish guidance structure trapped 75% of the C. damascina individuals that ascended the fishway in the Cataloluk reservoir, and those individuals did not migrate further upstream due to the lack of fishway at Kısık Weir. On the other hand, remaining individuals moved downstream of the Cataloluk Dam; 12.5% of individuals remained stationary in the pool habitat at inadequate environmental flow in the bypassed reach, and others moved to Sucatı Reservoir. We found that a fish’s core home range, where it spent 50% of its time during the tracking period, corresponds to 11% of the length of the Tekir stream. These results provide valuable insights into the movement patterns and habitat use of C. damascina in hydropower-regulated rivers, which may inform future management strategies for fish passage and habitat conservation in similar ecosystems.