Predation Rate on Olive Riley Sea Turtle ( Lepidochelys olivacea ) Nests with Solitary Nesting Activity from 2008 to 2021 at Corozalito, Costa Rica.

Autor: Espinoza-Rodríguez N; Rescue Center for Endangered Marine Species (CREMA), Nandayure 50906, Costa Rica.; Grupo de Trabajo en Tortugas Marinas del Golfo de Venezuela (GTTM-GV), Maracaibo 4002, Venezuela., Rojas-Cañizales D; Rescue Center for Endangered Marine Species (CREMA), Nandayure 50906, Costa Rica.; Grupo de Trabajo en Tortugas Marinas del Golfo de Venezuela (GTTM-GV), Maracaibo 4002, Venezuela., Mejías-Balsalobre C; Rescue Center for Endangered Marine Species (CREMA), Nandayure 50906, Costa Rica.; Red de Investigadores Actuando por el Medio Ambiente (RIAMA), C/Nuñez de Balboa 114, 28006 Madrid, Spain., Naranjo I; Rescue Center for Endangered Marine Species (CREMA), Nandayure 50906, Costa Rica., Arauz R; Marine Watch International, San Francisco, CA 94129, USA.
Jazyk: angličtina
Zdroj: Animals : an open access journal from MDPI [Animals (Basel)] 2023 Feb 28; Vol. 13 (5). Date of Electronic Publication: 2023 Feb 28.
DOI: 10.3390/ani13050875
Abstrakt: In Corozalito beach, Costa Rica, Olive Ridley turtles ( Lepidochelys olivacea ) nest both solitarily and in arribadas. The predation of solitary nests was monitored from 2008 to 2021, recording date, time, sector of the beach, zone, status of nest (predated or partially predated) and predator when possible. We recorded 4450 predated nests in total (N = 30,148 nesting events); predation rates showed a fluctuating trend, with recent percentages reaching up to 30%, with four distinctive dips in 2010, 2014, 2016 and 2017. The spatial distribution of predated nests along the beach showed significant differences among the sectors regardless of the seasons (Friedman test, chi-squared = 14.778, df = 2, p -value = 0.000), with most predated nests (47.62%) occurring in the northern sectors of the beach. Predators were identified by their tracks and/or direct observations (N = 896, 24.08%). The most conspicuous predators identified were raccoons (55.69%) and black vultures (22.77%). As seen in Corozalito, predation rates have increased in recent years despite established conservation efforts. A comprehensive assessment of all threats towards the overall hatching success for clutches is needed, considering predation during mass nesting events, poaching and beach erosion, among other factors, to fully understand the nesting dynamics occurring in this beach.
Databáze: MEDLINE
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