Using stable-isotope analysis to assess recent diet and habitat use of stranded green turtles (Chelonia mydas)

Wildlife Research, Год журнала: 2024, Номер 51(12)

Опубликована: Дек. 8, 2024

Context Gaining a better understanding of the foraging ecology green turtles (Chelonia mydas) in different regions can improve effectiveness conservation and management strategies for this species. New South Wales (NSW), eastern Australia, has been identified as region requiring improved information on habitat use by turtles. Aims The aim study was to stable-isotope analyses investigate diet composition found stranded along NSW coastline from 2018 2021. Methods This measured δ13C, δ15N, δ34S macrophyte (mangrove, seagrass, algae) samples collected coastline, between March June 2021, epidermis tissue that same In addition, values animals known, or expected, be consumed were sourced literature. Macrophyte mapped display spatial variations, then combined with literature-sourced animal matter isotope into mixing models. Mixing models used determine structure each turtle, their similarity regional infer potential locations. Key results High variation present sources limiting recent locations δ15N turtle indicated most sampled feeding two three trophic levels above primary producers within algal-based food webs. suggested these webs predominantly supported algae (mean ± s. d. = 51.2 6.1%) material (31.4 4.7%), mangrove (13.4 2.0%) seagrass (4.0 2.5%) representing much smaller proportions overall composition. Conclusions showed feed primarily algae-dominated webs, evidence omnivory. These findings suggest individuals compositions alternative those Queensland counterparts, who seagrass-dominated habitats. Management programs should focus anthropogenic disturbances Implications novel finding demonstrated importance habitats south-eastern Australia. generated isoscapes are useful examining isotopic variations macrophytes coastline.

Язык: Английский

Sea turtle conservation in São Tomé and Príncipe: Policies, practices, and insights from a community‐based initiative

Conservation Science and Practice, Год журнала: 2024, Номер 6(7)

Опубликована: Июнь 18, 2024

Abstract Unifying research and conservation objectives with the needs of local populations demands a profound understanding field. This perspective provides brief policy social‐cultural context for endangered sea turtles in São Tomé Príncipe, Central Africa. It is illustrated by initiatives implemented from 90s to 2000s complemented community‐based intervention on Príncipe Island (2010–2014). The focused awareness‐raising, economic‐alternatives, capacity‐building, surveillances deter poaching, collect scientific data, increase outreach. contributed reduce turtle exploitation, train conservationists, awareness economic alternatives. Securing stakeholders' support vital success, endeavors like this provide cost‐effective approach, aligning biodiversity strategies values aspirations. Overall, underscores that failure collaborate those involved wildlife subsistence livelihoods often results delays setbacks reducing while modest investments stewardship can efficiently improve ecosystems human well‐being.

Язык: Английский

Assessment of feeding grounds for loggerhead and green turtles in Korean water through stranding and bycatch data

Biological Conservation, Год журнала: 2024, Номер 302, С. 110935 - 110935

Опубликована: Дек. 19, 2024

Язык: Английский