Telemetry

Since 2005, CREMA has developed an acoustic and satellite tagging program for several key marine species such as sea turtles, rays and sharks. Currently, CREMA has two main acoustic monitoring projects located in 1) Cocos Island and 2) on the North Pacific coast of Costa Rica.

In Cocos Island, 11 species of elasmobranchs and two species of sea turtles are monitored (see tagging section). While on the North Pacific coast, monitoring efforts have focused on three main species: bull sharks, hawksbill turtles and giant manta rays.

** Data up to February 2022 (recent data taken from OTN database).

In the coastal project (acoustic tags only):

# turtles tagged: 32 hawksbill turtle (Eretmochelys imbricata) – Hawksbill turtle.
# sharks tagged: 23 bull shark (Carcharhinus leucas) – Bull shark
# mantas tagged: 26 manta rays (Mobula birostris) – Giant manta
**Data up to April 2021 (recent data taken from OTN database)

At Cocos Island (acoustic tags only)

Total number of tagged turtles: 44
41 – Green sea turtel (Chelonia mydas) – Green turtle
3 –  Hawksbill sea turtle (Eretmochelys imbricata) – Hawksbill turtle
Total number of tagged sharks: 290
16 – Black tip shark (Carcharhinus limbatus) – Blacktip shark
38 -Galapagos shark (Carcharhinus galapagensis) – Galapagos shark
180 – Scalloped hammerhead shark (Sphyrna lewini) – Scalloped hammerhead shark
1 – Thresher shark (Alopias pelagicus) – Pelagic thresher shark
15 – Silky shark (Carcharhinus falciformis) – Silky shark
19 – Silvertip shark (Carcharhinus albimarginatus) – Silvertip shark
19 – Tiger shark (Galeocerdo cuvier) – Tiger shark
2 – Whale shark (Rhincodon typus) – Whale shark

Total number of tagged mantas: 6

Giant manta (Mobula birostris) – Giant manta = 5
Reef manta ray (Mobula alfredi) – Reef manta ray = 1

 

** Datos hasta febrero 2022 (datos recientes tomados de base de datos OTN)

  • En el proyecto costero (solo marcas acústicas):
    • # tortugas marcadas: 32 tortuga carey (Eretmochelys imbricata) – Hawksbill turtle
    • # tiburones marcados: 23 tiburón toro (Carcharhinus leucas) – Bull shark
    • # mantas marcadas: 26 manta gigante (Mobula birostris) – Giant manta

**Datos hasta abril 2021 (datos recientes tomados de base de datos OTN)

  • En la Isla del Coco (solo marcas acústicas)
    • Número total de tortugas marcadas: 44
      • 41 – Tortuga verde (Chelonia mydas) – Green turtle
      •   3 – Tortuga carey (Eretmochelys imbricata) – Hawksbill turtle
    • Número total de tiburones marcados: 290
      • 16 – Tiburón puntas negras (Carcharhinus limbatus) – Blacktip shark
      • 38 – Tiburón Galápagos (Carcharhinus galapagensis) – Galapagos shark
      • 180 – Tiburón martillo común (Sphyrna lewini) – Scalloped hammerhead shark
      • 1  – Tiburón zorro (Alopias pelagicus) – Pelagic thresher shark
      • 15 – Tiburón sedoso (Carcharhinus falciformis) – Silky shark
      • 19 – Tiburón de puntas plateadas (Carcharhinus albimarginatus) – Silvertip shark
      • 19 – Tiburón tigre (Galeocerdo cuvier) – Tiger shark
      • 2 – Tiburón ballena (Rhincodon typus) – Whale shark
      • Número total de mantas marcadas: 6
      • Manta gigante (Mobula birostris) – Giant manta = 5
      • Manta alfredi (Mobula alfredi) – Reef manta ray = 1