Fish Hatchery Management - fisheries & aquaculture

472 FISH HATCHERY MANAGEMENTAscites The accumulation of serum-like fluid in the abdomen.Ascorbic Acid Vitamin C, a water-soluble antioxident important for theproduction of connective tissue; deficiencies cause spinal abnormalitiesAsphyxiaand reduce wound-healing capabilities.Suffocation caused by too little oxygen or too much carbondioxide in the blood.Asymptomatic Carrier An individual that shows no signs of a diseasebut harbors and transmits it to others.Atmosphere The envelope of gases surrounding the earth; also, pressureequal to air pressure at sea level, approximately 14.7 pounds persquare inch.Atrophy A degeneration or diminution of a cell or body part due todisuse, defect, or nutritional deficiency.Auditory Referring to the ear or to hearing.Autopsy A medical examination of the body after death to ascertain thecause of death.Available Energy Energy available from nutrients after food is digestedand absorbed.Available Oxygen As used in this text, that oxygen present in thewater in excess of the amount required for minimum maintenance of aspecies, and that can be used for metabolism and growth.Avirulent Not capable of producing disease.Avitaminosis (Hypovitaminosis) A disease caused by deficiency of oneor more vitamins in the diet.Axilla The region just behind the pectoral fin base.BacteremiaThe presence of living bacteria in the blood with or withoutsignificant response by the host.Bacterial Gill Disease A disease usually associated with unfavorableenvironmental conditions followed by secondary invasion of opportunistbacteria. Sae Environmental Gill Disease.Bacterial Hemorrhagic Septicemia A disease caused by many of the.gram-negative rod-shaped bacteria (usually of the genera Aeromonas orPseudomonas) that invade all tissues and blood of the fish. Synonyms:infectious dropsy; red pest; fresh water eel disease; redmouth disease;motile aeromonad septicemia (VnS).Bacterial Kidney Disease An acute to chronic disease of salmonidsBacterincaused by Renibacterium salmoninarum. Synonyms: corynebacterial kidneydisease; Dee's disease; kidney disease.A vaccine prepared from bacteria and inactivated by heat orchemicals in a manner that does not alter the cell antigens.