Fish Hatchery Management - fisheries & aquaculture

GLOSSARY 473BacteriocidalBacteriostaticreproduction of bacteria.Having the ability to kill bacteria.Having the ability to inhibit or retard the growth orBacterium (plural: bacteria) One of a large, widely distributed group oftypically one-celled microorganisms, often parasitic or pathogenic.Balanced Diet (feed) A diet that provides adequate nutrients for normalgrowth and reproduction.Bar MarksBarbelVertical color marks on fishes.An elongated fleshy projection, usually of the lips.Basal Metabolic Rate The oxygen consumed by a completely restinganimal per unit weight and time.Basal Metabolism Minimum energy requirements to maintain vitalbody processes.BathBenignBioassayA solution of therapeutic or prophylactic chemicals in which fishare immersed. See Dip; Short Bath; Flush; Long Bath; Constant-FlowTreatment.Not endangering life or health.Any test in which organisms are used to detect or measure thepresence or effect of a chemical or condition.Biochemical Oxygen Demand (nOO) The quantity of dissolved oxygentaken up by nonliving organic matter in the water.Biological Control Control of undesirable animals or plants by meansof predators, parasites, pathogens, or genetic diseases (including sterilization).Biological Oxidation Oxidation of organic matter by organisms in theBiotinpresence of oxygen.Vitamin H, one of the B-complex vitamins.Black Grub Black spots in the skin of fishes caused by metacercaria(larval stages) of the trematodes Lluilifer ambloplitis, Cryptocotyle lingua,and others. Synonym: black-spot disease.Black Spot Usually refers to black cysts of intermediate stages of trematodesin fish. Sae Black Grub.Black-Spot Disease Sar Black Grub.Black-Tail Disease Sae Whirling Disease.Blank EggBlastoporeAn unfertilized egg.Channel leading into a cavity in the egg where fertilizationtakes place and early cell division begins.Blastula A hollow ball of cells, one of the early stages in embryologicaldevelopment.Blood FlagellatesBlue-Sac DiseaseFlagellated protozoan parasites of the blood.A disease of sac fry characterized by opalescence anddistension of the yolk sac with fluid and caused by previous partialasphyxia.