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April 28, 2026Marine and Freshwater Research

Effects of density-dependent and environmental processes on long-term recruitment dynamics of barramundi (Lates calcarifer) in a tropical wetland

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Authors

BRBrien H. RobertsRGRoland GriffinBGBlair S. Grace

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Overview

Randomized trial quantifies effects of environmental and biological factors on barramundi recruitment in a tropical wetland, indicating potential management strategies.

Key Points

  • This research aims to quantify how environmental and biological factors influence barramundi recruitment dynamics over 20 years.
  • Depletion sampling using gillnets conducted annually over 20 years to estimate age-specific abundance.
  • Developed a Piecewise Structural Equation Model to analyze biotic and abiotic drivers of recruitment and size-at-age.
  • Young-of-year recruitment negatively correlated with 1-year-old abundance (indicating cannibalism).
  • Size-at-age negatively correlated with cohort strength (indicating intraspecific competition).
  • Wetter years correlated with stronger recruitment and higher emigration rates of 1-year-olds.

Cite This Study

Roberts et al. (2026) studied this question.

synapsesocial.com/papers/69f04e5b727298f751e72578https://doi.org/10.1071/mf25228
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