Animal tracking with particle algorithms for conservation

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Abstract The movements of aquatic animals affect their exposure to threats and the efficacy conservation measures, such as Marine Protected Areas (MPAs). However, many species’ remain poorly understood difficult reconstruct from available datasets, hampering efforts. This is especially case for species that rarely surface, which data are often limited observations acoustic telemetry (detections) ancillary sensors, archival tags. Here, we pioneer use state-of-the-art particle algorithms model animal movement, integrate datasets assess MPA design, using a study Critically Endangered flapper skate ( Dipturus intermedius ) in Scotland. Our led 5-fold improvements maps space 30-fold residency estimates (lower mean error) compared prevailing heuristic methods. By formally integrating tracking were uniquely able examine beyond receivers into fished zones, MPA-scale specific habitats protected areas may warrant protection. work showcases probabilistically sound modelling framework sufficiently fast, flexible accessible meet demands modern animal-tracking systems. represents marked advance analyses worldwide.

Язык: Английский

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Reassessment of the possible size, form, weight, cruising speed, and growth parameters of the extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae), and new evolutionary insights into its gigantism, life history strategies, ecology, and extinction

Palaeontologia Electronica, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Otodus megalodon (Lamniformes: Otodontidae) is an iconic Neogene shark, but the lack of well-preserved skeletons has hampered our understanding various aspects its biology. Here, we reassess some biological properties using a new approach, based on known vertebral specimens O. and 165 species extinct extant neoselachian sharks across ten orders. Using median neurocranial caudal fin proportions relative to trunk proportion among non-mitsukurinid/non-alopiid lamniforms, show that could have had slender body possibly reached about 24.3 m in length. Allometric considerations indicate stout plan like white shark (Carcharodon carcharias) for incurred excessive hydrodynamic costs, further supporting interpretation likely slenderer than C. carcharias. A 24.3-m-long may weighed around 94 t, with estimated cruising speed 2.1-3.5 km h-1. reanalysis growth bands suggests size at birth 3.6-3.9 megalodon, previous interpretations ovoviviparity embryos' intrauterine oophagous behavior, less need nursery areas. Additional inferred patterns corroborated by fossil record support hypothesis emergence carcharias during Early Pliocene least partly responsible demise due competition resources. These are working hypotheses expected serve as reasonable reference points future studies biology megalodon.

Язык: Английский

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Ocean leadership: Can the European Union influence the global shark meat trade?

Marine Policy, Год журнала: 2025, Номер 177, С. 106659 - 106659

Опубликована: Март 30, 2025

Язык: Английский

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Microplastic footprints in sharks and rays: First assessment of microplastic pollution in two cartilaginous fishes, hardnose shark and whitespotted whipray

Marine Pollution Bulletin, Год журнала: 2024, Номер 212, С. 117350 - 117350

Опубликована: Дек. 27, 2024

Язык: Английский

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