Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds

Villegas-Amtmann S, Jeglinski J, Costa DP, Robinson PW, Trillmich F (2013)
PLoS ONE 8(8): e70748.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Download
Es wurden keine Dateien hochgeladen. Nur Publikationsnachweis!
Autor*in
Villegas-Amtmann, Stella; Jeglinski, JanaUniBi; Costa, Daniel P.; Robinson, Patrick W.; Trillmich, FritzUniBi
Abstract / Bemerkung
Most competition studies between species are conducted from a population-level approach. Few studies have examined inter-specific competition in conjunction with intra-specific competition, with an individual-based approach. To our knowledge, none has been conducted on marine top predators. Sympatric Galapagos fur seals (Arctocephalus galapagoensis) and sea lions (Zalophus wollebaeki) share similar geographic habitats and potentially compete. We studied their foraging niche overlap at Cabo Douglas, Fernandina Island from simultaneously collected dive and movement data to examine spatial and temporal inter- and intra-specific competition. Sea lions exhibited 3 foraging strategies (shallow, intermediate and deep) indicating intra-specific competition. Fur seals exhibited one foraging strategy, diving predominantly at night, between 0–80 m depth and mostly at 19–22 h. Most sea lion dives also occurred at night (63%), between 0–40 m, within fur seals' diving depth range. 34% of sea lions night dives occurred at 19–22 h, when fur seals dived the most, but most of them occurred at dawn and dusk, when fur seals exhibited the least amount of dives. Fur seals and sea lions foraging behavior overlapped at 19 and 21 h between 0–30 m depths. Sea lions from the deep diving strategy exhibited the greatest foraging overlap with fur seals, in time (19 h), depth during overlapping time (21–24 m), and foraging range (37.7%). Fur seals foraging range was larger. Cabo Douglas northwest coastal area, region of highest diving density, is a foraging “hot spot” for both species. Fur seals and sea lions foraging niche overlap occurred, but segregation also occurred; fur seals primarily dived at night, while sea lions exhibited night and day diving. Both species exploited depths and areas exclusive to their species. Niche breadth generally increases with environmental uncertainty and decreased productivity. Potential competition between these species could be greater during warmer periods when prey availability is reduced.
Erscheinungsjahr
2013
Zeitschriftentitel
PLoS ONE
Band
8
Ausgabe
8
Art.-Nr.
e70748
ISSN
1932-6203
eISSN
1932-6203
Page URI
https://pub.uni-bielefeld.de/record/2616543

Zitieren

Villegas-Amtmann S, Jeglinski J, Costa DP, Robinson PW, Trillmich F. Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds. PLoS ONE. 2013;8(8): e70748.
Villegas-Amtmann, S., Jeglinski, J., Costa, D. P., Robinson, P. W., & Trillmich, F. (2013). Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds. PLoS ONE, 8(8), e70748. doi:10.1371/journal.pone.0070748
Villegas-Amtmann, Stella, Jeglinski, Jana, Costa, Daniel P., Robinson, Patrick W., and Trillmich, Fritz. 2013. “Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds”. PLoS ONE 8 (8): e70748.
Villegas-Amtmann, S., Jeglinski, J., Costa, D. P., Robinson, P. W., and Trillmich, F. (2013). Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds. PLoS ONE 8:e70748.
Villegas-Amtmann, S., et al., 2013. Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds. PLoS ONE, 8(8): e70748.
S. Villegas-Amtmann, et al., “Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds”, PLoS ONE, vol. 8, 2013, : e70748.
Villegas-Amtmann, S., Jeglinski, J., Costa, D.P., Robinson, P.W., Trillmich, F.: Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds. PLoS ONE. 8, : e70748 (2013).
Villegas-Amtmann, Stella, Jeglinski, Jana, Costa, Daniel P., Robinson, Patrick W., and Trillmich, Fritz. “Individual Foraging Strategies Reveal Niche Overlap between Endangered Galapagos Pinnipeds”. PLoS ONE 8.8 (2013): e70748.

7 Zitationen in Europe PMC

Daten bereitgestellt von Europe PubMed Central.

The energetic consequences of behavioral variation in a marine carnivore.
McHuron EA, Peterson SH, Hückstädt LA, Melin SR, Harris JD, Costa DP., Ecol Evol 8(8), 2018
PMID: 29721302
Bacterial Communities Associated with Houseflies (Musca domestica L.) Sampled within and between Farms.
Bahrndorff S, de Jonge N, Skovgård H, Nielsen JL., PLoS One 12(1), 2017
PMID: 28081167
Intraspecific variation in feeding strategies of Galapagos sea lions: A case of trophic specialization.
Páez-Rosas D, Villegas-Amtmann S, Costa D., PLoS One 12(10), 2017
PMID: 29059188
Stable Isotopes Reveal Long-Term Fidelity to Foraging Grounds in the Galapagos Sea Lion (Zalophus wollebaeki).
Drago M, Franco-Trecu V, Cardona L, Inchausti P, Tapia W, Páez-Rosas D., PLoS One 11(1), 2016
PMID: 26808381
Foraging strategies of a generalist marine predator inhabiting a dynamic environment.
McHuron EA, Robinson PW, Simmons SE, Kuhn CE, Fowler M, Costa DP., Oecologia 182(4), 2016
PMID: 27651228

66 References

Daten bereitgestellt von Europe PubMed Central.

Ecological Segregation of Adelie, Gentoo, and Chinstrap Penguins at King-George-Island, Antarctica
AUTHOR UNKNOWN, 1987
Foraging-Niche Separation of Breeding Gentoo and Chinstrap Penguins, South Shetland Islands, Antarctica
AUTHOR UNKNOWN, 2010
Niche partitioning among and within sympatric tropical seabirds revealed by stable isotope analysis
AUTHOR UNKNOWN, 2010
Resource partitioning and niche hyper-volume overlap in free-living Pygoscelid penguins
AUTHOR UNKNOWN, 2010
Limiting Similarity Convergence and Divergence of Coexisting Species
AUTHOR UNKNOWN, 1967

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0
The interaction between predation and competition: a review and synthesis
AUTHOR UNKNOWN, 2002
Mechanisms of maintenance of species diversity
AUTHOR UNKNOWN, 2000
Mutualism can mediate competition and promote coexistence
AUTHOR UNKNOWN, 2003
Intra- and interspecific competition among the water snakes Nerodia sipedon and Nerodia rhombifer
AUTHOR UNKNOWN, 2003
Intra- and interspecific density dependence in the survival and recruitment of grey-sided (Clethrinomys rufocanus) and bank voles (C-glareolus)
AUTHOR UNKNOWN, 2003
Effects of inter- and intra-specific competition on the growth rates of juvenile European barbel Barbus barbus used in the stock enhancement of UK fisheries
AUTHOR UNKNOWN, 2011
An intraspecific and interspecific comparison of raptor diets in the south-west of the Northern Territory, Australia
AUTHOR UNKNOWN, 2001
Niche overlap in sympatric populations of fox and gray squirrels
AUTHOR UNKNOWN, 1998
Coexistence of Ecologically Similar Colonizing Species - Intraspecific and Interspecific Competition in Drosophila aldrichi and D. buzzatii
AUTHOR UNKNOWN, 1991
Ecological niche modeling of sympatric krill predators around Marguerite Bay, Western Antarctic Peninsula
AUTHOR UNKNOWN, 2011
Foraging space as a limited resource: inter- and intra-specific competition among sympatric pursuit-diving seabirds
AUTHOR UNKNOWN, 2011
Are penguins and seals in competition for Antarctic krill at South Georgia?
AUTHOR UNKNOWN, 2002
At-sea behaviour of three krill predators breeding at Bouvetoya-Antarctic fur seals, macaroni penguins and chinstrap penguins
AUTHOR UNKNOWN, 2013
Stable isotopes indicate differing foraging strategies in two sympatric otariids of the Galapagos Islands
AUTHOR UNKNOWN, 2012
Diet overlap between harbour porpoise and bottlenose dolphin: An argument in favour of interference competition for food?
AUTHOR UNKNOWN, 2006
Prey competition between sympatric Steller sea lions (Eumetopias jubatus) and northern fur seals (Callorhinus ursinus) on Lovushki Island, Russia
AUTHOR UNKNOWN, 2012
Resource partitioning by sympatric Steller sea lions and northern fur seals as revealed by biochemical dietary analyses and satellite telemetry
AUTHOR UNKNOWN, 2012

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0
Fish prey of the sympatric Galapagos fur seals and sea lions: seasonal variation and niche separation
AUTHOR UNKNOWN, 1999
Diet and feeding overlap of two otariids, Zalophus californianus and Arctocephalus townsendi: Implications to survive environmental uncertainty
AUTHOR UNKNOWN, 2007
Foraging Characteristics of Female Northern Fur Seals (Callorhinus-Ursinus) and California Sea Lions (Zalophus-Californianus)
AUTHOR UNKNOWN, 1990
Same size--same niche? Foraging niche separation between sympatric juvenile Galapagos sea lions and adult Galapagos fur seals.
Jeglinski JW, Goetz KT, Werner C, Costa DP, Trillmich F., J Anim Ecol 82(3), 2013
PMID: 23351022
Overlap between pinniped summer diet and artisanal fishery catches in Uruguay
AUTHOR UNKNOWN, 2004
Zalophus wollebaeki
AUTHOR UNKNOWN, 2008

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0
Ontogeny of diving behaviour in the Galapagos fur seal
AUTHOR UNKNOWN, 1997
Multiple foraging strategies in a marine apex predator, the Galapagos sea lion Zalophus wollebaeki
AUTHOR UNKNOWN, 2008
Oxygen stores plasticity linked to foraging behaviour and pregnancy in a diving predator, the Galapagos sea lion
AUTHOR UNKNOWN, 2010
Accuracy of ARGOS Locations of Pinnipeds at-Sea Estimated Using Fastloc GPS
AUTHOR UNKNOWN, 2010
Same size – same niche? Foraging niche separation between sympatric juvenile Galapagos sea lions and adult Galapagos fur seals
AUTHOR UNKNOWN, 2013

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0
Geographic variation in the foraging behavior, diet and chick growth of rockhopper penguins
AUTHOR UNKNOWN, 2003
Determining trophic niche width: a novel approach using stable isotope analysis
AUTHOR UNKNOWN, 2004
When does physiology limit the foraging behavior of freely diving mammals?
AUTHOR UNKNOWN, 2004

AUTHOR UNKNOWN, 0
Testing the Iron Hypothesis in Ecosystems of the Equatorial Pacific-Ocean
AUTHOR UNKNOWN, 1994
Surface seawater distributions of inorganic carbon and nutrients around the Galapagos Islands: results from the PlumEx experiment using automated chemical mapping
AUTHOR UNKNOWN, 1998
Cephalopods in the diet of fur seals of the Galapagos
AUTHOR UNKNOWN, 1980
Energetics of a benthic diver: seasonal foraging ecology of the Australian sea lion, Neophoca cinerea
AUTHOR UNKNOWN, 2003
Reproductive and Foraging Energetics of High-Latitude Penguins, Albatrosses and Pinnipeds - Implications for Life-History Patterns
AUTHOR UNKNOWN, 1991
Lunar cycles in diel prey migrations exert a stronger effect on the diving of juveniles than adult Galapagos fur seals
AUTHOR UNKNOWN, 1999
Variación temporal y espacial del espectro trófico del lobo marino de Galápagos
AUTHOR UNKNOWN, 2005
Alimentary niche partitioning in the Galapagos sea lion, Zalophus wollebaeki
AUTHOR UNKNOWN, 2010
The ecology of individuals: incidence and implications of individual specialization.
Bolnick DI, Svanback R, Fordyce JA, Yang LH, Davis JM, Hulsey CD, Forister ML., Am. Nat. 161(1), 2002
PMID: 12650459
Tracing early stages of species differentiation: Ecological, morphological and genetic divergence of Galapagos sea lion populations
AUTHOR UNKNOWN, 2008
Heat Regulation in Some Arctic and Tropical Mammals and Birds
AUTHOR UNKNOWN, 1950

AUTHOR UNKNOWN, 0

AUTHOR UNKNOWN, 0
Global warming benefits the small in aquatic ecosystems.
Daufresne M, Lengfellner K, Sommer U., Proc. Natl. Acad. Sci. U.S.A. 106(31), 2009
PMID: 19620720

AUTHOR UNKNOWN, 0
Worldwide large-scale fluctuations of sardine and anchovy populations
AUTHOR UNKNOWN, 1999
From anchovies to sardines and back: multidecadal change in the Pacific Ocean.
Chavez FP, Ryan J, Lluch-Cota SE, Niquen C M., Science 299(5604), 2003
PMID: 12522241
Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®
Quellen

PMID: 23967096
PubMed | Europe PMC

Suchen in

Google Scholar