- 行业: Government
- Number of terms: 30456
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NOAA Coral Reef Conservation Program, National Oceanic and Atmospheric Administration, U.S. Department of Commerce
Sonar designed to look sideways and at a downward angle from both sides of a towed unit, called a towfish. The bottom and any objects in the water above the bottom reflect sound waves back to the towed array. An image is produced fom this information.
Industry:Natural environment
The distance between two successive wave crests or troughs.
Industry:Natural environment
The point of insertion or commencement of septa in some corals.
Industry:Natural environment
The theory that the Earth's lithosphere consists of large, rigid plates that move horizontally in response to the flow of the asthenosphere beneath them, and that interactions among the plates at their borders cause most major geologic activity, including the creation of oceans, continents, mountains, volcanoes, and earthquakes.
Industry:Natural environment
The kingdom of multicellular heterotrophic eukaryotes that are capable of motility during some stage of their life history.
Industry:Natural environment
A change from one ambient pressure to a lower ambient pressure as the scuba diver ascends. Decompression also occurs in a decompression chamber. Decompression results in a reduction of gas pressures within the body.
Industry:Natural environment
A fishing method where lures or baits attached to lines are towed behind a slowly moving boat.
Industry:Natural environment
A marine mollusk of the Subclass Polyplacophora, which contains about 600 species of sedentary animals commonly known as chitons.They are found from shallow waters to depths of about 400 m. A chiton has a broad foot and a shell consisting of eight overlapping plates.
Industry:Natural environment
A principal male steroid hormone, such as testosterone, which stimulates the development and maintenance of the male reproductive system and secondary male sexual characteristics.
Industry:Natural environment
A starfish larval stage following the bipinnaria stage. It has projecting arms and a developed stomach.
Industry:Natural environment
