We developed and applied a method to quantify spearfisher effort and catch. shark interactions and shark depredation in a boat-based recreational spearfishing competition in the Great Barrier Reef Marine Park in Queensland. Survey questions were designed to collect targeted quantitative data whilst minimising the survey burden of spearfishers. We provide the first known scientific stu... https://lockdownsecuritycanada.shop/product-category/smart-mirror-lcd-display/