Document Type : CASE STUDY
1 Department of Information Management, College of Informatics, Chaoyang University of Technology, Taiwan
2 Department of Statistics, College of Natural Sciences Seoul National University, Shin Lim-Dong, Kwan Ak Ku, South Korea
3 Department of Statistics, Padjadjaran University, West Java, Indonesia
4 Museum Zoologicum Bogoriense, Research Center for Biology, Indonesian Institute of Sciences, Indonesia
5 Indonesian Agency for Meteorological, Climatological and Geophysics, BMKG, Manado, Indonesia
BACKGROUND AND OBJECTIVES: The classification of marine animals as protected species makes data and information on them to be very important. Therefore, this led to the need to retrieve and understand the data on the event counts for stranded marine animals based on location emergence, number of individuals, behavior, and threats to their presence. Whales are generally often stranded in very shallow areas with sloping sea floors and sand. Data were collected in this study on the incidence of stranded marine animals in 20 provinces of Indonesia from 2015 to 2019 with the focus on animals such as Balaenopteridae, Delphinidae, Lamnidae, Physeteridae and Rhincodontidae.
METHODS:Multivariate latent generalized linear model was used to compare several distributions to analyze the diversity of event counts. Two optimization models including Laplace and Variational approximations were also applied.
RESULTS: The best theta parameter in the latent multivariate latent generalized linear latent variable model was found in the Akaike Information Criterion, Akaike Information Criterion Corrected and Bayesian Information Criterion values, andthe information obtained was used to create a spatial cluster. Moreover, there was a comprehensive discussion on ocean-atmosphere interaction and the reasons the animals were stranded.
CONCLUSION: The changes in marine ecosystems due to climate change, pollution, overexploitation, changes in sea use, and the existence of invasive alien species deserve serious attention.
- There are differences in the number of events counts for stranded marine animals in 20 provinces of Indonesia during 2015-2019;
- Multivariate latent generalized linear models have been shown to be successful in estimating differences in the number of event counts. Both Laplace approximation and Variational approximation used for optimization provided different results;
- Poisson was found to be more appropriate with Laplace approximation while Gaussian is the best fit for Variational approximation. Moreover, the use of Tweedie was found to require a very long time of computing to reach convergence.
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