Seabirds as Indicators of Marine Food Supplies
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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.Abstract:
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. Adult survivorship, breeding success, chick growth, colony attendance, and activity budgets vary with prey availability, but response to food supply occurs at different temporal scales and at different levels of prey availability for each parameter. Seabird data most reliably indicate food availability when monophagous birds are used to monitor temporal variation in prey supplies. Seabird-based data on prey availability are cheaper to obtain than conventional fisheries abundance indices, and may be particularly useful for the many species and areas for which conventional fisheries data are sparse or absent.read more
Citations
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Journal ArticleDOI
Global Seabird Response to Forage Fish Depletion-One-Third for the Birds
Philippe Cury,Ian L. Boyd,Sylvain Bonhommeau,Tycho Anker-Nilssen,Robert J. M. Crawford,Robert W. Furness,James A. Mills,Eugene J. Murphy,Henrik Österblom,Michelle Paleczny,John F. Piatt,Jean-Paul Roux,Lynne J. Shannon,William J. Sydeman +13 more
TL;DR: A threshold in prey abundance is identified below which seabirds experience consistently reduced and more variable productivity and provides an indicator of the minimal forage fish biomass needed to sustain seabird productivity over the long term.
Journal ArticleDOI
Recent Bayesian stable-isotope mixing models are highly sensitive to variation in discrimination factors.
TL;DR: This work used whole blood from Common Terns and muscle from their common prey items to build a series of mixing models in SIAR (stable isotope analysis in R) using various discrimination factors from the published literature for marine birds, finding the estimated proportion of each diet component was affected significantly by delta13C or delta15N.
Journal ArticleDOI
Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula
Grace Saba,William R. Fraser,Vincent S. Saba,Richard A. Iannuzzi,Kaycee E. Coleman,Scott C. Doney,Hugh W. Ducklow,Douglas G. Martinson,Travis Miles,Donna L. Patterson-Fraser,Sharon Stammerjohn,Sharon Stammerjohn,Deborah K. Steinberg,Oscar Schofield +13 more
TL;DR: It is shown that positive anomalies in chlorophyll-a (chl-a) at Palmer Station, occurring every 4-6 years, are constrained by physical processes in the preceding winter/spring and a negative phase of the Southern Annular Mode (SAM).
Journal ArticleDOI
Negligible Impact of Ingested Microplastics on Tissue Concentrations of Persistent Organic Pollutants in Northern Fulmars off Coastal Norway
Dorte Herzke,Tycho Anker-Nilssen,Therese Haugdahl Nøst,Arntraut Götsch,Signe Christensen-Dalsgaard,Magdalene Langset,Kirstin Fangel,Albert A. Koelmans +7 more
TL;DR: It is shown that plastic is more likely to act as a passive sampler than as a vector of POPs, thus reflecting the POP profiles of simultaneously ingested prey.
Little Fish, Big Impact: Managing a Crucial Link in Ocean Food Webs
Ellen K. Pikitch,Patricia Dee Boersma,Ian L. Boyd,David O. Conover,Philippe Cury,Timothy E. Essington,Selina S. Heppell,Edward D. Houde,Marc Mangel,Daniel Pauly,Eva Plaganyi-Lloyd,Keith Sainsbury,Robert S. Steneck +12 more
TL;DR: In this paper, a shoal of forage fish (center), surrounded by (clockwise from top), humpback whale, Cape gannet, Steller sea lions, Atlantic puffins, sardines and black-legged kittiwake.
References
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Journal ArticleDOI
Dynamics of food availability, body condition and physiological stress response in breeding Black‐legged Kittiwakes
TL;DR: The results suggest that, in addition to a seasonal change in bird physiology during reproduction, local ecological factors such as food availability affect circulating levels of corticosterone and adrenal response to acute stress.
Journal ArticleDOI
Colony and population dynamics of black-legged kittiwakes in a heterogeneous environment
Robert M. Suryan,David B. Irons +1 more
TL;DR: Recruitment of kittiwakes in Prince William Sound supported the performance-based conspecific attraction hypothesis, which, in turn, led to an ideal free distribution of breeding birds.
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