Global Seabird Response to Forage Fish Depletion—One-Third for the Birds

@article{Cury2011GlobalSR,
  title={Global Seabird Response to Forage Fish Depletion—One-Third for the Birds},
  author={P. Cury and I. Boyd and S. Bonhommeau and T. Anker‐Nilssen and R. Crawford and R. Furness and J. A. Mills and E. Murphy and H. {\"O}sterblom and M. Paleczny and J. Piatt and J. Roux and L. Shannon and W. Sydeman},
  journal={Science},
  year={2011},
  volume={334},
  pages={1703 - 1706}
}
One-third of maximum fish biomass must be available for seabirds to sustain high breeding success. Determining the form of key predator-prey relationships is critical for understanding marine ecosystem dynamics. Using a comprehensive global database, we quantified the effect of fluctuations in food abundance on seabird breeding success. We identified a threshold in prey (fish and krill, termed “forage fish”) abundance below which seabirds experience consistently reduced and more variable… Expand

Topics from this paper

Best practices for assessing forage fish fisheries-seabird resource competition
TLDR
The methods used to date to study fisheries competition with seabirds are reviewed, “best practices” for future resource competition assessments are presented, and an integrated approach is most promising to obtain robust scientific results. Expand
Evaluating impacts of forage fish abundance on marine predators.
TLDR
It is suggested that additional limitation of forage fish harvest to levels well below sustainable yields would rarely result in detectable increases in marine predator populations. Expand
Seabirds maintain offspring provisioning rate despite fluctuations in prey abundance: a multi-species functional response for guillemots in the North Sea
TLDR
Guillemots appeared able to adjust their foraging tactics over a wide range of prey abundances to maintain a consistent energetic intake rate for chicks, conferring some resilience in the face of environmental variation. Expand
Forage fish, their fisheries, and their predators: who drives whom?
TLDR
Size-based foodweb modelling suggests that reducing fishing mortality may not necessarily lead to larger stocks of piscivorous fish, especially if their early life stages compete with forage fish for zooplankton resources. Expand
The global contribution of forage fish to marine fisheries and ecosystems
Forage fish play a pivotal role in marine ecosystems and economies worldwide by sustaining many predators and fisheries directly and indirectly. We estimate global forage fish contributions to marineExpand
Impacts of depleting forage species in the California Current
TLDR
Two well-developed ecosystem models for the California Current on the West Coast of the USA were used to test the impacts on other parts of the ecosystem of harvesting euphausiids, forage fish, mackerel and mesopelagic fish such as myctophids. Expand
Breeding failure of seabirds in relation to fish depletion: Is there one universal threshold of food abundance?
TLDR
It is found that breeding success of gannets started to decline at about 8% of MPA, in contrast to the general CT previously proposed and when corrected for the sizes of prey available that may be eaten by the birds and the removal of fish by the fishing industry, the observed threshold was reduced, indicating that such effects should be included in the context of ecosystem based management. Expand
Varied breeding responses of seabirds to a regime shift in prey base in the Gulf of Maine
TLDR
It is concluded that razorbills and murres need higher-quality diets than puffins, which more frequently exploited lower-lipid food during food shortages, however, puffin reproductive output was much more vulnerable to ocean warming owing to their longer breeding season and more varied diet. Expand
PELAGIC AND DEMERSAL FISH PREDATORS ON JUVENILE AND ADULT FORAGE FISHES IN THE NORTHERN CALIFORNIA CURRENT : SPATIAL AND TEMPORAL VARIATIONS
A requisite for reliable food web models and ecosystem-based management in regions such as the California Current is the availability of diet information on key predators. In upwelling ecosystems,Expand
Exploring the implications of the harvest control rule for Pacific sardine, accounting for predator dynamics: A MICE model
An ecosystem approach to forage fish management is required because forage fish support large fisheries, are prey for many valued species in marine food webs, and provide important social andExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 142 REFERENCES
Responses of seabirds to depletion of food fish stocks
TLDR
The sensitivity of seabird adult survival rates may be a feature of the detailed ecology of particular species and may be affected by ecological conditions such as the possibilities for prey switching, and Fishery managers may set a lower limit biomass to protect fish stock recruitment, but it is unclear whether this threshold would also protect the needs ofSeabirds dependent on the fish stock. Expand
Seabirds as Indicators of Marine Food Supplies
TLDR
An integrated approach to the use of seabirds as indicators of marine food supplies is developed, based on proposed relations between food availability and seabird population and behavior parameters, which may be particularly useful for the many species and areas for which conventional fisheries data are sparse or absent. Expand
Impacts of Fishing Low–Trophic Level Species on Marine Ecosystems
TLDR
It is found that fishing low–trophic level species at conventional maximum sustainable yield (MSY) levels can have large impacts on other parts of the ecosystem, particularly when they constitute a high proportion of the biomass in the ecosystem or are highly connected in the food web. Expand
Estimating the impacts of fishing on dependent predators: a case study in the California Current.
TLDR
The results are consistent with the premise that the impacts of local rockfish fisheries on seabird productivity are less than impacts that have occurred to the prey resources themselves due to ocean climate and the ability of seabirds to buffer against changes in prey availability through prey-switching and other behavioral mechanisms. Expand
Forage fish of the Pacific Rim as revealed by diet of a piscivorous seabird: synchrony and relationships with sea surface temperature
TLDR
Predator diet sampling offers a fishery-independent, large-scale perspective on forage fish dynamics that may be difficult to obtain using conventional means of study and factors other than local SST or interannual variability may more strongly influence forage fishes. Expand
Integrated environment–prey–predator interactions off South Georgia: implications for management of fisheries
1. The oceanography of the South Georgia region is principally that of the Southern Ocean rather than the South Atlantic. A combination of factors, including advection, local bathymetry and highExpand
Diets of top predators indicate pelagic juvenile rockfish (Sebastes spp.) abundance in the California Current System
Diets of top predators may be useful indicators to the availability of forage fish in marine ecosystems. Juvenile rockfish (young-of-the-year Sebastes spp.) compose a significant part of the diet forExpand
Changes in fisheries discard rates and seabird communities
TLDR
Reduced rates of discarding, particularly when coupled with reduced availability of small shoaling pelagic fish such as sandeel, result in an increase in predation by great skuas on other birds. Expand
Monitoring of seabirds in the Benguela upwelling system: can seabirds be used as indicators and predictors of change in the marine environment?
TLDR
Cyclic variations in the annual yields of seabird products evident at decadal long time-scales may reflect fluctuations in prey populations at similar periods, but no such relationship has been demonstrated and consequently the value of such annual yields as indicators is not proved. Expand
BREEDING STATUS, POPULATION TRENDS AND DIETS OF SEABIRDS IN ALASKA, 2000
TLDR
The value of the marine bird monitoring program is enhanced by having sufficiently long time-series to describe patterns for these long-lived species. Expand
...
1
2
3
4
5
...