Subcomponent 1.3 Ecosystem Analysis
Activity
1.3.1.2 Lab-based analysis of samples
Output 1.3.1 Observer sampling and analysis of
commercial fishery catches to determine trophic relationships of pelagic species in the WTP Large Marine
Ecosystem
Activity
1.3.1.1 Collect observer-based sampling data (stomach content and tissue
samples)
Collection
of samples:
3851 samples have been collected since the beginning of the project (3102 during tagging trips and 749 from the national observer programmes)
In progress
Stomach
content examination:
708 stomach have been examined between Sept 2007 and
Sept 2008. The stomach database now contain information from 4032 stomach content of 71 different
species
Isotope
analysis:
Isotope data of the tropical tuna species have been
compiled to create isomaps for the equatorial Pacific. They outline differences in isotope values between eastern
and western Pacific, however they do not show differences in trophic levels. A scientific paper is in
preparation.
In progress
Completed
Reports:
4 quarterly “Biological Sampling Newsletter” for the observers and port samplers presenting progress in sampling
