Otolith and Genomic Data Reveal Temporal Insights Into Stocking Across a Large River Basin in a Mobile, Long‐Lived Australian Freshwater Fish Species

Molecular Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Freshwater ecosystems and their biota are under increasing pressure from anthropogenic stressors. In response to declining fish stocks, hatchery stocking programmes widely implemented as core components of restoration management strategies, with positive outcomes for some wild populations. Despite this, remains contentious due potential genetic ecological risks Monitoring evaluation critical ensuring the long-term sustainability populations, but identification stocked individuals post-release a key challenge, particularly mobile species. this study, we combined otolith (natal origin age) genomic data identify evaluate implications culturally socioeconomically important freshwater fish, golden perch Macquaria ambigua (family: Percichthyidae), across Australia's Murray-Darling Basin (MDB). We also generated chromosome-level genome assembly. Many close kin were detected MDB, in prevalence over recent decades mostly origin. Rivers many associated low effective population sizes (Ne < 100). Genetic signatures varied according local context, being most pronounced not restricted rivers considered functionally isolated purposes. Where into that part connected metapopulation, there is scope modify current practices avoid over-representation related individuals. Increased focus on diversity likely promote persistence wild.

Language: Английский

An introduction to the collection ‘Environmental flows in northern Murray–Darling Basin: what we know about the science and management after a decade of practice’

Marine and Freshwater Research, Journal Year: 2024, Volume and Issue: 75(15)

Published: Oct. 16, 2024

This paper is the foreword to a collection on monitoring and research outcomes related water management in northern Murray–Darling Basin (MDB), Australia. It provides background MDB, along with summary of papers presented collection. article belongs Environmental flows Basin: what we know about science after decade practice.

Language: Английский