|
catadromous
|
|
|
Migrates as a juvenile from salt water to fresh water and then returns as an adult to spawn in salt water; some eels are catadromous, but most Pacific salmon are anadromous, which is the opposite. Compare anadromous.
|
|
cetacean
|
|
|
Of the order Cetacea, which includes all whales. The three suborders are the toothed whales or Odontoceti (killer whales, dolphins, porpoises, beluga whales, and sperm whales), the baleen whales or Mysticeti (blue whales, humpback whales, gray whales, and right whales), and the Archaeoceti (which all are now extinct).
|
|
CFMC
|
|
|
Caribbean Fishery Management Council.
|
|
CFR
|
|
|
Code of Federal Regulations.
|
|
chemosynthesis
|
|
|
The process whereby chemical energy is used to make organic compounds from inorganic compounds. One example is the oxidation of ammonia to nitrite by nitrifying bacteria. Compare photosynthesis and primary production.
|
|
Chinook salmon
|
|
|
Species Oncorhynchus tshawytscha. See also Pacific salmon.
|
|
chum salmon
|
|
|
Species Oncorhynchus keta. See also Pacific salmon.
|
|
coded-wire tag
|
|
|
Miniature radio frequency electronic tags that are placed in fish and provide a means for researchers to track fish movements and study their behavior.
|
|
coho salmon
|
|
|
Species Oncorhynchus kisutch. See also Pacific salmon.
|
|
community
|
|
|
A naturally occurring group of plants and animals that live within a certain environment and interact with each other. Communities are often defined by a dominant species (e.g., kelp forest community) or the major physical characteristics of the area (e.g., mud flats).
|
|
congener
|
|
|
An organism of the same class, group, or genus as another (from the Latin for "same race").
|
|
conservation biology
|
|
|
A field of science that deals with threats to biodiversity. The goals of conservation biology are to investigate human impacts of biodiversity and to develop approaches to prevent extinction through stewardship of entire biological communities.
|
|
Conservation Biology Division
|
|
|
One of six divisions under the Science Director's Office of the Northwest Fisheries Science Center. See also NWFSC.
|
|
contaminants
|
|
|
Chemical pollution in coastal areas near urban centers that may be responsible for a variety of deleterious biological effects in aquatic species.
|
|
convergent evolution
|
|
|
The development of similar structures in organisms that do not share a recent common ancestor (e.g., the eyes of squid, flies, and humans). See also evolution; compare divergent evolution.
|
|
CPUE
|
|
|
Catch per unit of effort. The number of fish caught by an amount of effort. Typically, effort is a combination of gear type, gear size, and length of time gear is used. Catch per unit of effort is often used as a measurement of relative abundance.
|
|
CRI
|
|
|
Cumulative Risk Initiative. CRI is an ongoing effort of the NWFSC that assesses salmonid population trends and the impact of various actions on those trends.
|
|
cytokine
|
|
|
A class of proteins that are released by immune system cells to stimulate an immune response.
|
