scholarly journals Fatty acid signature analysis from the milk of Antarctic fur seals and Southern elephant seals from South Georgia:implications for diet determination

1999 ◽  
Vol 187 ◽  
pp. 251-263 ◽  
Author(s):  
DJ Brown ◽  
Il Boyd ◽  
GC Cripps ◽  
PJ Butler
Keyword(s):  
Fatty Acid ◽  
Signature Analysis ◽  
Fatty Acid Signature ◽  
Elephant Seals ◽  
Fur Seals ◽  
Southern Elephant Seals ◽  
Antarctic Fur Seals

Milk fatty acid signatures indicate both major and minor shifts in the diet of lactating Antarctic fur seals

1997 ◽  
Vol 75 (2) ◽  
pp. 188-197 ◽  
Author(s):  
S. J. Iverson ◽  
J. P. Y. Arnould ◽  
I. L. Boyd
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Foraging Ecology ◽  
Perinatal Period ◽  
Signature Analysis ◽  
Milk Fatty Acids ◽  
Fatty Acid Signature ◽  
Dietary History ◽  
Fur Seals ◽  
Antarctic Fur Seals

Fatty acid signature analysis is based on the principle that unique arrays of fatty acids within groups of organisms can be transferred, largely unaltered, up the marine food chain and thus may be an indicator of diet composition. We applied fatty acid signature analysis to milks collected from Antarctic fur seals (Arctocephalus gazella) at South Georgia in 1990–1991, during the perinatal period (N = 19) and subsequently during early (N = 11), mid (N = 11), and late (N = 8) foraging trips. In lactating otariid females, milk fatty acids secreted during the perinatal fast are derived largely from blubber mobilization and thus are influenced by dietary history prior to parturition. Conversely, milk fatty acids secreted during foraging trips are derived primarily from immediate dietary intake. The fatty acid signature of perinatal milks was significantly different from that of all other milks, suggesting differences in the prepartum diet when females are away from the breeding grounds. At the onset of foraging periods, the fatty acid composition of milks' changed dramatically to reflect a diet composed mainly of krill. However, during late foraging periods, milk fatty acids again changed from those of early and mid foraging, and suggested a predominance of teleost fish in the diet. These findings were consistent with independent assessments of diet by faecal analysis and indicate the potential value of fatty acid signature analysis in studying foraging ecology in free-ranging pinnipeds.

AGING LIVE ANTARCTIC FUR SEALS AND SOUTHERN ELEPHANT SEALS

1992 ◽  
Vol 8 (1) ◽  
pp. 37-43 ◽  
Author(s):  
T. A. Arnbom ◽  
N. J. Lunn ◽  
I. L. Boyd2 ◽  
T. Barton
Keyword(s):  
Elephant Seals ◽  
Fur Seals ◽  
Southern Elephant Seals ◽  
Antarctic Fur Seals

QUANTITATIVE FATTY ACID SIGNATURE ANALYSIS: A NEW METHOD OF ESTIMATING PREDATOR DIETS

2004 ◽  
Vol 74 (2) ◽  
pp. 211-235 ◽  
Author(s):  
Sara J. Iverson ◽  
Chris Field ◽  
W. Don Bowen ◽  
Wade Blanchard
Keyword(s):  
Fatty Acid ◽  
New Method ◽  
Signature Analysis ◽  
Fatty Acid Signature

First evaluation of quantitative fatty acid signature analysis (QFASA) in dolphins

2021 ◽  
pp. 102141
Author(s):  
Quan Xie ◽  
Xi Ning ◽  
Xiaoxiao He ◽  
Lixia Deng ◽  
Zhenger Wu ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Signature Analysis ◽  
Fatty Acid Signature

scholarly journals Review of Estimating Trophic Relationships by Quantitative Fatty Acid Signature Analysis

2020 ◽  
Vol 8 (12) ◽  
pp. 1030
Author(s):  
Junbo Zhang ◽  
Chonglan Ren ◽  
Hu Zhang ◽  
Fang Yin ◽  
Shuo Zhang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
First Generation ◽  
Trophic Relationships ◽  
Research Progress ◽  
Signature Analysis ◽  
Fatty Acid Signature ◽  
Predator Prey ◽  
Quantitative Ecology ◽  
Improper Use

The dynamic predator–prey relations in the food web are vital for understanding the function and structure of ecosystems. Dietary estimation is a research hotspot of quantitative ecology, providing key insights into predator–prey relationships. One of the most promising approaches is quantitative fatty acid signature analysis (QFASA), which is the first generation of statistical tools to estimate the quantitative trophic predator–prey relationships by comparing the fatty acid (FA) signatures among predators and their prey. QFASA has been continuously widely applied, refined and extended since its introduction. This article reviewed the research progress of QFASA from development and application. QFASA reflects the long-term diet of predator, and provides the quantitative dietary composition of predator, but it is sensitive to the metabolism of predator. The calibration coefficients (CCs) and the FA subset are two crucial parameters to explain the metabolism of predators, but the incorrect construction or improper use of CCs and the FA subset may cause bias in dietary estimation. Further study and refinement of the QFASA approach is needed to identify recommendations for which CCs and subsets of FA work best for different taxa and systems.

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