. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 70 CALIFORNIA FISH AND CAME n â * BUOYS ⺠'l. MAGNESIUM LINK LATEX 'tubing 10 CM FICURE 1. The abalone seeding module with cut-away section showing the temporary door interior with Astroturf, and the magnesium link attachment. Temporary doors were fitted in both passageways using cm thick perforated PVC plastic sheeting and were 30 X 8 cm high. Astroturf was cemented to the door interiors to inhibit abalone attachment. Thereby t
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 70 CALIFORNIA FISH AND CAME n â * BUOYS ⺠'l. MAGNESIUM LINK LATEX 'tubing 10 CM FICURE 1. The abalone seeding module with cut-away section showing the temporary door interior with Astroturf, and the magnesium link attachment. Temporary doors were fitted in both passageways using cm thick perforated PVC plastic sheeting and were 30 X 8 cm high. Astroturf was cemented to the door interiors to inhibit abalone attachment. Thereby the abalone could not impede water circulation by covering the door perforations, nor could they block the doors from opening by adhering to the door jambs. Both doors were held in place under tension (~ 60 newtons), with two 20 cm lengths of latex rubber tubing. This was done by fastening one end of each tubing length to opposite doors, then pulling the "free" ends of the tubing lengths together, and innerconnecting them with a magnesium link. Plastic cable ties were used to fasten the tubing ends to the doors and the magnesium link. The dissolution rate of magnesium in seawater is a function of temperature and salinity. Foreknowledge of these two parameters enabled us to select a proper sized link. Dissolution of the magnesium link in seawater ultimately releases the doors. A buoy was attached to each door exterior via a cm diameter nylon line m long. Between the buoy and door the nylon cord passes through a nylon lifting loop that is attached to the lid (1 lifting loop/buoy). When the doors are released they float up, away from the module passageway, and are retained by the lifting loops (Figure 1). The temporary doors are installed just before the abalone are introduced to the seeding module. Abalone Collector-Transporter An abalone collector-transporter was designed and fabricated to provide an attachment surface for the abalone while in transit and i
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