Cannibalism Dynamics in Aquaculture Fish Species
Summary
Cannibalism among aquaculture fish species is widely observed and represents a major challenge for commercial production. Two main forms are recognised: early larval cannibalism, when newly hatched individuals predate on smaller conspecifics, and later juvenile or adult cannibalism, which often reflects hierarchy and resource competition. Drivers include high stocking densities, size heterogeneity, nutritional deficiencies and environmental stressors, all of which amplify aggressive interactions. Consequences extend beyond direct mortality to increased disease susceptibility and uneven growth rates, undermining both welfare and yield. Mitigation strategies encompass habitat enrichment, regulated feeding regimes, size grading and environmental optimisation to mimic natural refuges. Recent advances in mathematical modelling have elucidated size thresholds and refuge dynamics, enabling predictive scenarios for culture practices. The global significance of this research lies in its potential to enhance sustainability, reduce economic losses and improve uniformity in farmed populations through an integrated approach that combines behavioural, nutritional and structural interventions.
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Cannibalism Dynamics in Aquaculture Fish Species publication trend
The graph below shows the total number of articles in cannibalism dynamics in aquaculture fish species across all publications each year (not limited to Nature Index journals).
Technical terms
Intracohort cannibalism: Predation between conspecifics belonging to the same cohort, often driven by size disparities.
Phenotypic plasticity: The capacity of an organism to alter its morphology or behaviour in response to environmental conditions or experiences.
Allometric growth: Differential growth rates of body parts that result in changes to shape or proportionality over time.
Refuge: Physical structures or habitat features that provide protection to vulnerable individuals from aggressive conspecifics.
References
- Intracohort cannibalism and methods for its mitigation in cultured freshwater fish. Reviews in Fish Biology and Fisheries (2017).
- Mathematical Model to Study the Effect of Refuge on Cannibalism in Atractosteus tropicus. Mathematics (2024).
- Modelling Size-Dependent Cannibalism in BarramundiLates calcarifer: Cannibalistic Polyphenism and Its Implication to Aquaculture. PLOS ONE (2013).
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