25.07.2014 Views

West Coast Groundfish Observer Program Manual, Part2 - NOAA

West Coast Groundfish Observer Program Manual, Part2 - NOAA

West Coast Groundfish Observer Program Manual, Part2 - NOAA

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

CHAPTER 6<br />

Data Collection from Tagged Fish<br />

Sablefish and salmon are the most commonly encountered<br />

tagged fish. Occasionally tagged Pacific cod, Pacific<br />

halibut, California halibut, pollock, shortspine thornyhead<br />

and some rockfish species may be seen as well.<br />

Collect the following data from tagged fish:<br />

1. Length<br />

2. Sex<br />

3. Otoliths - Except for sablefish with blue spaghetti<br />

tags and salmon. In these cases, collect the entire<br />

snout.<br />

4. Weight<br />

5. Tag – Collect either the external tag or salmon<br />

snout.<br />

Data Collection from Salmon<br />

Salmon are difficult to identify correctly and may be tagged<br />

internally or externally. Watch for missing adipose fins<br />

which mark fish with internal tags. Scales are collected<br />

both to verify species identification and from all tagged<br />

salmon.<br />

Collect the following data from salmon:<br />

1. Length<br />

2. Sex<br />

3. Weight<br />

6-4 1/30/2004

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!