Northwest Fisheries Science Center

Display All Information

Document Type: Journal Article
Center: NWFSC
Document ID: 7249
Title: A device for sorting bottom organisms
Author: John F. Scarola, Jeffrey H. Giberson
Publication Year: 1967
Journal: The Progressive Fish-Culturist
Volume: 29
Issue: 4
Pages: 242

A simple vacuum device has been used successfully in the hand picking of benthic organisms.  The device consists of a 2–ounce wide-mouthed jar, a two–holed cork stopper, and two glass tubes—1–1/4 inches in diameter and 3 and 5 inches in length.  The tubes are bent at 90° angles and inserted in the stopper.  When the bottle has been stoppered tightly, the shorter tube is connected to a vacuum pump by a length of flexible hose.  This tube should be screened at the intake to keep organisms from being accidentally drawn into the vacuum line. 

In operation, the suction at the tip of the longer tube rapidly draws organisms from the sorter's forceps into the collection jar.  To keep organisms from adhering to the inside of the collection tube, a drop of glycerol should occasionally be applied through the suction tip.  Organisms can easily be flushed through the tube into the collection bottle by dipping the tip of the tube in water.  This device has reduced sorting time by approximately one–third.  

URL1: The next link will exit from NWFSC web site[242:ADFSBO]2.0.CO;2