Fishing elevates variability in the abundance of exploited species

  title={Fishing elevates variability in the abundance of exploited species},
  author={Chih‐hao Hsieh and Christian S Reiss and John R. S. Hunter and John R. Beddington and Robert M. May and George Sugihara},
The separation of the effects of environmental variability from the impacts of fishing has been elusive, but is essential for sound fisheries management. We distinguish environmental effects from fishing effects by comparing the temporal variability of exploited versus unexploited fish stocks living in the same environments. Using the unique suite of 50-year-long larval fish surveys from the California Cooperative Oceanic Fisheries Investigations we analyse fishing as a treatment effect in a… 

Biological Impacts of Recreational Fishing Resulting from Exploitation, Stocking and Introduction

While the biological impacts of commercial fishing are well documented, those of recreational fisheries have received less attention. However, intensive and selective angling and related activities

Spatial analysis shows that fishing enhances the climatic sensitivity of marine fishes

It is suggested that reduced spatial heterogeneity can cause exploited popula - tions to be more vulnerable to climate variability, an effect that could have considerable importance in the management of fish stocks.

Impacts of environmental change and direct and indirect harvesting effects on the dynamics of a marine fish community

Dramatic shifts in the species composition of the marine fish community of the southern Gulf of St. Lawrence are described using a 35-year time series of catch rates in an annual bottom-trawl survey and a traits-based approach is attempted to understand the causes.

Fishing constrains phenotypic responses of marine fish to climate variability.

It is speculated that the dramatic loss of individual-level biocomplexity is caused by either inadvertent fisheries selectivity based on behaviour, or the disruption of social hierarchies resulting from the selective harvesting of large, dominant and resource-rich individuals.

Why fishing magnifies fluctuations in fish abundance

In California Current fisheries, increased temporal variability in the population does not arise from variable exploitation, nor does it reflect direct environmental tracking, but arises from increased instability in dynamics.

Fishing effects on age and spatial structures undermine population stability of fishes

A widespread phenomenon of age (size)-truncation of exploited populations driven by size-selective fishery removals is documented.

How does fishing alter marine populations and ecosystems sensitivity to climate

Potential for fisheries-induced evolution in the Laurentian Great Lakes

Shift in recreational fishing catches as a function of an extreme cold event

There is an increasing recognition that the influence of extreme climate events (ECE) can be more significant in structuring ecosystem dynamics than the gradual effects of climate change. Still, our



Rapid worldwide depletion of predatory fish communities

The analysis suggests that management based on recent data alone may be misleading, and provides minimum estimates for unexploited communities, which could serve as the 'missing baseline' needed for future restoration efforts.

Fisheries Sustainability via Protection of Age Structure and Spatial Distribution of Fish Populations

Recent research suggesting that an old-growth age structure, combined with a broad spatial distribution of spawning and recruitment, is at least as important as spawning biomass in maintaining long-term sustainable population levels is summarized.

Regulation in fish populations: myth or mirage?

It is indeed quite plausible that the only regulatory process operating for fish populations is a stochastic one: increased (and non-normal) variability at low stock sizes, but only because of increasingly large, but increasingly infrequent, outstanding year-classes.

Measuring marine fish biodiversity: temporal changes in abundance, life history and demography

  • J. HutchingsJ. Baum
  • Environmental Science
    Philosophical Transactions of the Royal Society B: Biological Sciences
  • 2005
It is concluded that reductions in the rate of population decline will be insufficient to effect a recovery of marine fish biodiversity, and that great care must be exercised when interpreting multi-species patterns in abundance.

Collapse and recovery of marine fishes

It is shown that there is very little evidence for rapid recovery from prolonged declines, in contrast to the perception that marine fishes are highly resilient to large population reductions.

Impacts of demographic variation in spawning characteristics on reference points for fishery management

Traditional approaches to F-based reference points using SSB systematically overestimate the resiliency of stocks to fishing and if age-at-spawning is at least partially heritable, then intense fishing on younger ages may exert high levels of selection for early maturity with negative impacts on net reproductive effort and trait diversity.

Fisheries productivity in the northeastern Pacific Ocean over the past 2,200 years

Reconstruction of ∼2,200-year records of sockeye salmon abundance from sediment cores obtained from salmon nursery lakes on Kodiak island, Alaska demonstrates the strong role of climatic forcing in regulating northeastern Pacific fish stocks.

Vital Statistics of the Pacific Sardine (Sardinops Caerulea) and the Population Consequences.

The population parameters of the Pacific sardine are estimated from growth, mortality, and fecundity data, together with the increase per generation Ro estimated by fitting the Ricker equation, which generates a population growth curve not unlike the logistic at low values of rm.