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Latitudinal range influences the seasonal variation in the foraging behavior of marine top predators. (Registro nro. 13105)

000 -LEADER
fixed length control field 03076nab a22003137a 4500
003 - CONTROL NUMBER IDENTIFIER
control field EC-PaCDF
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20171127092209.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 170814t20112011xxu||||| |||||||||||eng||
040 ## - CATALOGING SOURCE
Original cataloging agency EC-PaCDF
041 ## - LANGUAGE CODE
Language code of text/sound track or separate title eng
082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER
Edition number 21
Classification number 599.7975
100 1# - MAIN ENTRY--PERSONAL NAME
Personal name Villegas-Amtmann, Stella.
9 (RLIN) 269
245 10 - TITLE STATEMENT
Title Latitudinal range influences the seasonal variation in the foraging behavior of marine top predators.
520 0# - SUMMARY, ETC.
Summary, etc. Non-migratory resident species should be capable of modifying their foraging behavior to accommodate changes in prey abundance and availability associated with a changing environment. Populations that are better adapted to change will have higher foraging success and greater potential for survival in the face of climate change. We studied two species of resident central place foragers from temperate and equatorial regions with differing population trends and prey availability associated to season, the California sea lion (Zalophus californianus) (CSL) whose population is increasing and the endangered Galapagos sea lion (Zalophus wollebaeki) (GSL) whose population is declining. To determine their response to environmental change, we studied and compared their diving behavior using time-depth recorders and satellite location tags and their diet by measuring C and N isotope ratios during a warm and a cold season. Based on latitudinal differences in oceanographic productivity, we hypothesized that the seasonal variation in foraging behavior would differ for these two species. CSL exhibited greater seasonal variability in their foraging behavior as seen in changes to their diving behavior, foraging areas and diet between seasons. Conversely, GSL did not change their diving behavior between seasons, presenting three foraging strategies (shallow, deep and bottom divers) during both. GSL exhibited greater dive and foraging effort than CSL. We suggest that during the warm and less productive season a greater range of foraging behaviors in CSL was associated with greater competition for prey, which relaxed during the cold season when resource availability was greater. GSL foraging specialization suggests that resources are limited throughout the year due to lower primary production and lower seasonal variation in productivity compared to CSL. These latitudinal differences influence their foraging success, pup survival and population growth reflected in contrasting population trends in which CSL are more successful and potentially more resilient to climate change.
546 ## - LANGUAGE NOTE
Language note English
653 ## - INDEX TERM--UNCONTROLLED
Uncontrolled term California sea lion.
653 ## - INDEX TERM--UNCONTROLLED
Uncontrolled term León marino de California.
653 ## - INDEX TERM--UNCONTROLLED
Uncontrolled term Zalophus californianus.
653 ## - INDEX TERM--UNCONTROLLED
Uncontrolled term Galapagos sea lion.
653 ## - INDEX TERM--UNCONTROLLED
Uncontrolled term León marino de las Islas Galápagos.
653 ## - INDEX TERM--UNCONTROLLED
Uncontrolled term Zalophus wollebaeki.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Simmons, Samantha E.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Kuhn, Carey E.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Huckstadt, Luis A.
700 1# - ADDED ENTRY--PERSONAL NAME
Personal name Costa, Daniel P.
9 (RLIN) 270
773 0# - HOST ITEM ENTRY
Related parts Vol. 6, no. 8 (August 2011), p. 1-10
Title PLOS ONE.
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier http://dx.doi.org/10.1371/journal.pone.0023166
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme
Koha item type Article
Existencias
Withdrawn status Lost status Source of classification or shelving scheme Damaged status Not for loan Collection code Permanent Location Current Location Shelving location Date acquired Full call number Barcode Date last seen Price effective from Koha item type
          Galapagos Corley Smith Library Corley Smith Library Articles 2017-08-15 599.7975 VIL 2017-2195 2017-08-15 2017-08-15 Article
          Galapagos Corley Smith Library Corley Smith Library PDF Collection 2017-08-15 599.7975 VIL   2017-08-15 2017-08-15 Electronic document

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