Collapse and recovery of marine fishes

@article{Hutchings2000CollapseAR,
  title={Collapse and recovery of marine fishes},
  author={Jeffrey A. Hutchings},
  journal={Nature},
  year={2000},
  volume={406},
  pages={882-885}
}
  • J. Hutchings
  • Published 24 August 2000
  • Environmental Science
  • Nature
Over-exploitation and subsequent collapse of marine fishes has focused attention on the ability of affected populations to recover to former abundance levels and on the degree to which their persistence is threatened by extinction. Although potential for recovery has been assessed indirectly, actual changes in population size following long-term declines have not been examined empirically. Here I show that there is very little evidence for rapid recovery from prolonged declines, in contrast to… 

Marine Fish Population Collapses: Consequences for Recovery and Extinction Risk

Data from more than 230 populations reveal a median reduction of 83% in breeding population size from known historic levels, drawing attention to scientists' limited understanding of how fish behavior, habitat, ecology, and evolution affect population growth at low abundance.

Influence of population decline, fishing, and spawner variability on the recovery of marine fishes

Among populations for which fishing mortality declined after collapse, recovery was independent of exploitation rate, even when fishing mortality post-collapse was expressed as a function of each population's maximum growth rate.

Extinction, survival or recovery of large predatory fishes

  • R. MyersB. Worm
  • Environmental Science, Biology
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2005
It is concluded that management of multi–species fisheries needs to be tailored to the most sensitive, rather than the more robust species, to initiate recovery of severely depleted communities.

Extreme increases in natural mortality prevent recovery of collapsed fish populations in a Northwest Atlantic ecosystem

There is a need for more precautionary management regimes in order to avoid population collapses that are not reversible by reducing exploitation, and recovery of collapsed demersal fish populations does not appear to be possible under current conditions in this ecosystem.

Signatures of the collapse and incipient recovery of an overexploited marine ecosystem

Evidence is found that community-level signals of the collapse and recovery of the cod are apparent in the spatial and temporal dynamics of the broader groundfish community and should be useful for designing more effective management strategies to ensure the persistence of exploited marine ecosystems.

Causes of Decline and Potential for Recovery of Atlantic Cod Populations

It is shown that, for all North East Atlantic cod populations, continued high fishing pressure is sufficient to explain the failure of stocks to recover and the stocks would increase at 40-60% per year in the absence of fishing.

Methods of assessing extinction risk in marine fishes.

A two-tiered approach for defining and assessing extinction risk is suggested, where simple methods requiring a few easily estimated parameters are used to triage or rapidly assess large numbers of populations and species to identify potentially vulnerable populations or species.

Marine reserves: long-term protection is required for full recovery of predatory fish populations

The duration of protection required for unfished populations of large predatory reef fish to attain natural states and the time required for full recovery appear consistent with known life history characteristics of these fish, and with empirical data on recovery rates of heavily exploited fish stocks.

Empirical links between natural mortality and recovery in marine fishes

It is concluded that recovery potential is greater for populations adapted to high M but that temporal increases in M concomitant with smaller size at maturity will have the opposite effect, slowing recovery and increasing its uncertainty.

Unexpected patterns of fisheries collapse in the world's oceans

This work analyzed two fisheries datasets to determine the life-history traits of species that have suffered dramatic population collapses, and suggests that up to twice as many fisheries for small, low trophic-level species have collapsed compared with those for large predators.
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