Black rockfish round-robin exchange

melissa.monk — Mon, 01 Aug 2022 23:34:05 +0000

I'm going to use this thread to initiate interest in the black rockfish round-robin exchange before requesting an official CARE exchange number from Andrew.

Please respond if your lab would like to be included and provide the following info:

1. Lab name and contact person for the exchange

2. Do you have 50 black fish to contribute from your state? What is the size range of fish?

3. Is the scientist who aged vermilion rockfish as part of the 2020 round-robin is available to participate in the black rockfish round robin? If we have a few of the same people for both species comparisons that will add insight to the analyses.

4. How many scientists from your lab will age the black rockfish in this exchange?

5. Are there any biogeographical breaks in your state (e.g., Cape Mendocino in CA) that may lead to differences in growth in black rockfish? If yes, do you have 50 structures from each region?

Thanks!

Melissa

p.s. If I don't get any responses here, I'll send out a Google Form :)

Rougheye Rockfish Exchange (2020-2022) between AFSC and ADF&G Juneau

cgburski — Fri, 13 May 2022 22:19:27 +0000

In September 2020, Catherine Matson (ADF&G Juneau) requested a Rougheye Rockfish exchange with AFSC. The CARE Vice-Chair Andrew Claiborne (WDFW Olympia) assigned structure ID numbers for the CASE invoices. A sample of 30 otoliths collected in Region 2 with images from ADFG was sent to AFSC and AFSC sent a sample of 30 otoliths collected from the Gulf of Alaska with images to ADFG. Preparation methods included break and burns and break and bakes. The age reader for ADFG was Catherine and readers from AFSC were Chris Gburski, Betty Goetz and Delsa Anderl. Images were annotated in Photoshop by both ageing labs. An AFSC resolved age was generated by Chris Gburski. Precision results will be posted in the CARE exchange webpage for the 2 exchange sample sets, exchange ID#s 20-004 and 20-005.

Discrepancies between the 2 labs, where specimens were aged >10 years apart, were discussed virtually between AFSC and ADFG on April 6, 2021 for the ADFG sample. Participants were Chris Gburski (AFSC), Delsa Anderl (AFSC), Catherine Matson (ADFG) and Kevin McNeel (ADFG).

Discrepancies between the 2 labs, where specimens were aged >10 years apart, were discussed virtually between AFSC and ADFG on May, 3, 2022 for the AFSC samples. Participants were Chris Gburski (AFSC), Delsa Anderl (AFSC), Catherine Matson (ADFG) and Kevin McNeel (ADFG).

Inter-lab age determination criteria, interpretation of early growth years, ageing axis and ageing precision were reviewed via age reader annotated images with group discussion.

CARE Exchanges - Care Forum

Black rockfish round-robin exchange

Rougheye Rockfish Exchange (2020-2022) between AFSC and ADF&G Juneau