Greetings MARMAM Community,
On behalf of my co-authors I am happy to announce our new paper in PLOS ONE:
Grist EPM, McKinley TJ, Das S, Tregenza T, Jeffries A, Tregenza N (2022)
Estimating cetacean population trends from static acoustic monitoring
data using Paired Year Ratio Assessment (PYRA). PLoS ONE 17(3):
e0264289. https://doi.org/10.1371/journal.pone.0264289
Abstract
The cetacean conservationist is often faced with evaluating population
trends from abundance data that are either sparse or recorded at
different times in different years. The presence of diel or seasonal
patterns in the data together with unplanned gaps is often problematic.
Such data are typical of those obtained from static acoustic monitoring.
We present a simple and transparent nonparametric trend evaluation
method, ‘Paired Year Ratio Assessment (PYRA)’ that uses only whole days
of data wherever they are present in each of successive pairs of periods
of 365 days. We compare the performance of PYRA with traditional
generalised additive models and nonparametric randomisation tests that
require a greater level of skill and experience for both application and
interpretation. We conclude that PYRA is a powerful tool, particularly
in the context of identifying population trends which is often the main
aim of conservation-targeted acoustic monitoring.
The article is open-access and available at:
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0264289
<https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0264289>
Cheers,
Aileen Jeffries
Research Scientist, Biota Maxima
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