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<p>The whitetip reef shark, <i>Triaenodon obesus</i>, is a placental, viviparous shark that is a representative of coral and rocky reefs along the Pacific Ocean. Observations on its reproduction have been made in captivity and in the wild. This study analyzes evidence of pups and records of three mating events from two different seasons and sites in the Revillagigedo Archipelago, Mexico. Mating events were observed during daylight hours (8–14&#xa0;h) with temperatures ranging from 24 to 26&#xa0;°C, and at depths of 15–45&#xa0;m. Pups were recorded on Roca Partida Islet during February 2015, as well as one mating event in June 2021. The other two mating events were recorded in February 2016 on San Benedicto Island, located 120&#xa0;km from Roca Partida. The behaviour and timing of mating events in San Benedicto coincide with previous records in Costa Rica and French Polynesia, while the event in Roca Partida coincides with those in Hawai'i. Novel courtship and mating behaviours include observations of a large number of males (&gt; 15 sharks) pursuing and biting the pelvic region of mating individuals.</p>

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Reproductive behaviour of whitetip reef sharks Triaenodon obesus in the Revillagigedo Archipelago, Mexico

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Edgar Eduardo Becerril-García,
  • Arturo Ayala-Bocos,
  • Edgar Mauricio Hoyos-Padilla

摘要

The whitetip reef shark, Triaenodon obesus, is a placental, viviparous shark that is a representative of coral and rocky reefs along the Pacific Ocean. Observations on its reproduction have been made in captivity and in the wild. This study analyzes evidence of pups and records of three mating events from two different seasons and sites in the Revillagigedo Archipelago, Mexico. Mating events were observed during daylight hours (8–14 h) with temperatures ranging from 24 to 26 °C, and at depths of 15–45 m. Pups were recorded on Roca Partida Islet during February 2015, as well as one mating event in June 2021. The other two mating events were recorded in February 2016 on San Benedicto Island, located 120 km from Roca Partida. The behaviour and timing of mating events in San Benedicto coincide with previous records in Costa Rica and French Polynesia, while the event in Roca Partida coincides with those in Hawai'i. Novel courtship and mating behaviours include observations of a large number of males (> 15 sharks) pursuing and biting the pelvic region of mating individuals.