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By attracting fish into the field of view of a remotely controlled camera, the technique records fish diversity, abundance and behaviour of species. Sites are sampled by video recording the region surrounding a baited canister which is lowered to the bottom from a surface vessel or less commonly by a submersible or remotely operated underwater ...
Video is also an emerging option in camera traps, allowing researchers to record running streams of video and to document animal behavior. The battery life of some of these cameras is another important factor in which cameras are used; large batteries offer a longer running time for the camera but can be cumbersome in set up or when lugging the ...
Grouper capture their prey by sucking them into their mouths. Aquatic feeding mechanisms face a special difficulty as compared to feeding on land, because the density of water is about the same as that of the prey, so the prey tends to be pushed away when the mouth is closed.
In fishkeeping, a refugium is an appendage to a marine, brackish, or freshwater fish tank that shares the same water supply. It is a separate sump , connected to the main show tank. [ 1 ] It is a " refugium " in the sense that it permits organisms to be maintained that would not survive in the main system, whether food animals, anaerobic ...
Tapping the fiber means that all signals from every communications source being routed through the fiber are presented and must be sorted for relevant data, an immense task when thousands of sources of data or voice may be present. According to reports, the US government used fiber tapping for surveillance following the September 11, 2001 attacks.
Along with its Smart Bird Feeder (PRO and regular), Bird Buddy will also launch two new products soon: a Smart Hummingbird Feeder and Smart Bird Bath, along with some accessories (like a perch ...
Reoxygenating the system water is a crucial part to obtaining high production densities. Fish require oxygen to metabolize food and grow, as do bacteria communities in the biofilter. Dissolved oxygen levels can be increased through two methods, aeration and oxygenation. In aeration air is pumped through an air stone or similar device that ...
The mounting system is typically in the form of hooks or brackets. However, some electronic fish feeders also come with suction cups that attach to the wall of the aquarium. [4] Another advantage of these devices is that electronic fish feeders may also be used to feed amphibians, if they are kept in glass cages. [5] [6]