GLOSSARY 475 



Carnivorous Feeding or preying on animals. 



Carrier An individual harboring a pathogen without indicating signs of 



the disease. 

 Carrier Host (Transport Host) An animal in which the larval stage of a 



parasite will live but not develop. 

 Carrying Capacity The population, number, or weight of a species that 



a given environment can support for a given time. 

 Cartilage A substance more flexible than bone but serving the same 



purpose. 

 Catabolism The metabolic breakdown of materials with a resultant 



release of energy. 

 Catadromous Fish that leave fresh water and migrate to the sea to 



spawn. 

 Catalyst A substance that speeds up the rate of chemical reaction but is 



not itself used up in the reaction. 

 Cataract Partial or complete opacity of the crystalline lens of the eye or 



its capsule. 

 Catfish Virus Disease See Channel Catfish Virus Disease. 

 Caudal Pertaining to the posterior end. 

 Caudal Fin The tail fin of fish. 

 Caudal Peduncle The relatively thin posterior section of the body to 



which the caudal fin is attached; region between base of caudal fin 



and base of the last ray of the anal fin. 

 CCVD Channel Catfish Virus Disease. 

 Cecum (plural: Ceca) A blind sac of the alimentary canal, such as a 



pyloric cecum at the posterior end of the stomach. 

 Channel Catfish Virus Disease (CCVD) A disease caused by a her- 

 pesvirus that is infectious to channel catfish and blue catfish. 

 Chemical Coagulation A process in which chemical coagulants are put 



into water to form settleable floes from suspended colloidal solids. 

 Chemical Oxygen Demand (COD) A measure of the chemically oxi- 



dizable components in water, determined by the quantity of oxygen 



consumed. 

 Chemotherapy Cure or control of a disease by the use of chemicals 



(drugs). 

 Chinook Salmon Virus Disease See Infectious Hematopoietic Necrosis. 

 Chromatophores Colored pigment cells. 



Chromosomes Structural units of heredity in the nuclei of cells. 

 Chronic Occurring or recurring over a long time. 

 Chronic Inflammation Long-lasting inflammation. 



Cilia Movable organelles that project from some cells, used for locomo- 

 tion of one-celled organisms or to create fluid currents past attached 



cells. 



