SSA ACT branch proudly presents: Integrated Species Distribution Models: An Application to Fisheries Abundance Data presented by Quan Vu
In ecology and fisheries, species abundance data are often collected using a number of surveys that have different characteristics. In this talk, we analyze a dataset collected from two scallop surveys: a bottom trawl survey which covers a wide spatial domain but is less efficient, and a hydraulic dredge survey which is more efficient and spatially targeted. Spatial statistical models can be used to integrate information from these surveys to improve both interpretability and prediction of the abundance, rather than modeling the surveys independently. We will discuss different approaches to construct the integrated species distribution models, and introduce the single-index approach, based on a single index representing the latent spatial distribution of the species abundance, and survey-specific link functions representing the different catchability properties of each survey. Results show that our proposed model offers meaningful interpretations of covariate effects, spatial distribution, and survey catchability differences, and achieves better predictive performance than contemporary species distribution models.
This is joint work with Francis Hui, Alan Welsh, Samuel Muller, Eva Cantoni and Chris Haak.
Bio: Quan Vu
Quan Vu is a Postdoctoral Fellow in Statistics at the Research School of Finance, Actuarial Studies and Statistics, Australian National University. Quan is passionate about translating innovative statistical methods into practical, real-world applications. His research focuses on the development of statistical models for spatial and spatio-temporal data, with a particular emphasis on tackling complex environmental and ecological problems. His expertise includes Gaussian processes, basis function models, and deep neural networks, particularly in the context of spatial and spatio-temporal regression, prediction, and emulation.
Zoom Link:
Dinner: After the talk we will be holding a dinner at 7.15pm at Bistro Nguyens, Melbourne Building, 78-80 Alinga St, Canberra (Bistro Nguyens – Real Vietnamese in the city)
If you are interested in attending the dinner, please let us know by 5pm Monday 23 June by entering your details at SSA Canberra Branch dinner attendance sheet or contacting Warren Muller (warren.muller@csiro.au; 0407 916 868). Please regard this as a firm commitment, not just an intention. For withdrawals after the deadline, please remove your name from the sheet and phone or text Warren (0407 916 868).
NOTE: We are offering discounts to SSA early career and student members who attend dinner! For this meeting, dinners will be a fixed charge of $10 for student members and $20 for early career members.
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