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Optimization of swim depth across diverse taxa during horizontal travel.
Proc Natl Acad Sci U S A
December 2024
Deakin Marine Research and Innovation Centre, School of Life and Environmental Sciences, Deakin University, Geelong, VIC 3280, Australia.
Semiaquatic taxa, including humans, often swim at the air-water interface where they waste energy generating surface waves. For fully marine animals however, theory predicts the most cost-efficient depth-use pattern for migrating, air-breathing species that do not feed in transit is to travel at around 2 to 3 times the depth of their body diameter, to minimize the vertical distance traveled while avoiding wave drag close to the surface. This has rarely been examined, however, due to depth measurement resolution issues at the surface.
View Article and Find Full Text PDFAcoustic signature of plastic marine debris mimics the prey items of deep-diving cetaceans.
Mar Pollut Bull
December 2024
Duke University Marine Lab, Nicholas School of the Environment, Duke University, Durham, United States.
It is largely assumed that odontocetes voluntarily ingest plastic marine debris because they visually mistake it for prey. However, deep-diving whales do not rely on visual systems to forage and instead employ echolocation. Whether or not these whales misinterpret acoustic signals that lead to the accidental ingestion of plastic is unknown.
View Article and Find Full Text PDFNon-invasive methods characterise the world's largest tiger shark aggregation in Fuvahmulah, Maldives.
Sci Rep
September 2024
Marine Research and Conservation Foundation, Lydeard St Lawrence, Somerset, UK.
Tiger sharks are apex predators with a circumglobal tropical and warm-temperate distribution, with a general lack of population data for the central Indian Ocean. In Fuvahmulah, Maldives, tiger sharks display frequent use of the harbour area, attracted by discarded fish waste. Here, we document the population structure, residency, and reproductive characteristics of the world's largest known tiger shark aggregation in a geographically-restricted area.
View Article and Find Full Text PDFA recent comment by Boivin et al. urges academia and governments to address sexism and fight bias at higher education and research institutions as losing female academics is costing science and society too much. Herein, I discuss further underlying reasons of sexism in academia and the importance of a deep dive into the causes of inequity at individual faculty and school levels to develop bespoke and enforceable gender equity plans, the importance of not using basic statistic as the only tool to measure equity/inequity as well as how key performance indicators could be better used to advance gender equity and end sexism in academia.
View Article and Find Full Text PDFCopolymers as a turning point for large scale polyhydroxyalkanoates applications.
Int J Biol Macromol
August 2024
Waste-to-Bioproducts Lab, Department of Agronomy, Food, Natural resources, Animals and Environment (DAFNAE), University of Padova, Agripolis, Viale dell'Università, 16, 35020 Legnaro, PD, Italy; Department of Microbiology, Stellenbosch University, Private Bag X1, 7602 Matieland, South Africa. Electronic address:
Traditional plastics reshaped the society thanks to their brilliant properties and cut-price manufacturing costs. However, their protracted durability and limited recycling threaten the environment. Worthy alternatives seem to be polyhydroxyalkanoates, compostable biopolymers produced by several microbes.
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