to keep data for each fish clearly associated with its scale sample, from collection in the field through scale analyses and data dissemination. Assign a Scale ID Number to each sample prior to OR at the time of scale collection. The Scale ID Number should be written on the scale sample envelope and be included in any field data collected at the time the scale is taken. Follow the protocol of your project. Data for each scale sample includes associated location and biological data. Follow the protocol manuals of our project (e.g., OASIS or CCRMP training manuals or other). Scale Collection Scale collection is often done in less than ideal field conditions. Most salmon species are coming in river during cold and wet weather. Even with difficult conditions, the FLHAP is better able to serve the needs of the project providing the scales if care is taken in collecting scales. The area” or anatomical location for cool water fish like salmonids is based “key upon where sockeye 1st generate their scales during development (Figure 1). The correct 5-step procedure for obtaining scale samples is as follows: Locate key area (Figure 1). Scrape slime off with non-serrated portion of knife. Pluck 4-5 scales with forceps and place in scale envelope, using care to not stack scales. Repeat on other side of fish. Allow scale envelopes to dry and organize in a well-ventilated container Figure 1. The key area is where scales first form on juvenile fish. These scales contain the most complete life history information. The key area is located above the lateral
to keep data for each fish clearly associated with its scale sample, from collection in the field through scale analyses and data dissemination. Assign a Scale ID Number to each sample prior to OR at the time of scale collection. The Scale ID Number should be written on the scale sample envelope and be included in any field data collected at the time the scale is taken. Follow the protocol of your project. Data for each scale sample includes associated location and biological data. Follow the protocol manuals of our project (e.g., OASIS or CCRMP training manuals or other). Scale Collection Scale collection is often done in less than ideal field conditions. Most salmon species are coming in river during cold and wet weather. Even with difficult conditions, the FLHAP is better able to serve the needs of the project providing the scales if care is taken in collecting scales. The “key area” or anatomical location for cool water fish like salmonids is based upon where sockeye 1st generate their scales during development (Figure 1). The correct 5-step procedure for obtaining scale samples is as follows: Locate key area (Figure 1). Scrape slime off with non-serrated portion of knife. Pluck 4-5 scales with forceps and place in scale envelope, using care to not stack scales. Repeat on other side of fish. Allow scale envelopes to dry and organize in a well-ventilated container Figure 1. The key area is where scales first form on juvenile fish. These scales contain the most complete life history information. The key area is located above the lateral
ODFW_1076_2_FLHAP_SOP%20for%20scales6Aug2013.docx