Work

Calibrating and validating the Aerobic Mortality Risk Index (IRMA): an index for predicting mass mortality of fish due to anoxia

Year: 2025

Type: article

Abstract: To develop an early warning tool for mass fish mortality due to eutrophication in tropical estuaries, we calibrated and validated the Aerobic Mortality Risk Index (IRMA). To calculate IRMA, we used a conceptual model that relates the concentrations of PO4 (µmol.L-1), chlorophyll (CLA, µg.L-1) and dissolved oxygen (DO, mg.L-1), incorporating 30 years of monitoring data from the estuarine lagoon Ciénaga Grande de Santa Marta (CGSM) - Colombian Caribbean. We calibrated the model using the fish kill events recorded in CGSM and evaluated its performance through a confusion matrix. Several metrics were used to assess the effectiveness of IRMA, resulting in an optimized threshold value of 60%.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.14883640

Authors: Becerra, Luis Felipe, Mancera Pineda, José Ernesto, López Kleine, Liliana

Language: English

Topic: Marine and coastal ecosystems

Subfield: Oceanography

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDGs: Life below water, Clean water and sanitation

Open Access status: green

OpenAlex ID: W6949642810

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