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<p>Between 2015 and 2025, a total of 124 deep-water chondrichthyan individuals were recorded in El Quetzalito, Guatemala, through fishery-dependent monitoring (<i>n</i> = 86) and fishery-independent longline surveys (<i>n</i> = 38), representing seven shark species, one skate, and one chimaera. The gulper shark (<i>Centrophorus granulosus</i>) was the most recorded species across both surveys, with females and immature individuals present among the captures. Catch per unit effort (CPUE) for <i>C. granulosus</i> showed a decreasing trend in both monitoring approaches, underscoring the importance of continued monitoring to better understand these patterns. Other species recorded included <i>Hexanchus vitulus</i>, <i>Squalus cubensis</i>, <i>Neoharriotta carri</i>, and several rare or single-occurrence taxa. Fishery-independent data revealed species not seen in recent commercial landings, such as <i>S. cubensis</i>, emphasizing the value of complementary survey methods to detect underreported taxa in artisanal fisheries. The predominance of mature females in commercial landings and immature individuals in research surveys suggests differential spatial or behavioral patterns that may influence catchability. This study provides a baseline for understanding deep-water elasmobranch diversity in the region and highlights the importance of combining fishery-dependent and fishery-independent approaches to generate data on these little-known and vulnerable species.</p>

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Combining monitoring approaches to reveal deep-water chondrichthyans diversity in the Caribbean waters of Guatemala

  • 期刊论文

  • 发表日期：

    2026年5月5日

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  • Ana Cristina Hérnandez-Solis,
  • Julio Sánchez-Jiménez,
  • Elisa M. Areano-Barillas,
  • Juan Carlos Pérez-Jiménez

摘要

Between 2015 and 2025, a total of 124 deep-water chondrichthyan individuals were recorded in El Quetzalito, Guatemala, through fishery-dependent monitoring (n = 86) and fishery-independent longline surveys (n = 38), representing seven shark species, one skate, and one chimaera. The gulper shark (Centrophorus granulosus) was the most recorded species across both surveys, with females and immature individuals present among the captures. Catch per unit effort (CPUE) for C. granulosus showed a decreasing trend in both monitoring approaches, underscoring the importance of continued monitoring to better understand these patterns. Other species recorded included Hexanchus vitulus, Squalus cubensis, Neoharriotta carri, and several rare or single-occurrence taxa. Fishery-independent data revealed species not seen in recent commercial landings, such as S. cubensis, emphasizing the value of complementary survey methods to detect underreported taxa in artisanal fisheries. The predominance of mature females in commercial landings and immature individuals in research surveys suggests differential spatial or behavioral patterns that may influence catchability. This study provides a baseline for understanding deep-water elasmobranch diversity in the region and highlights the importance of combining fishery-dependent and fishery-independent approaches to generate data on these little-known and vulnerable species.