Results for “od”

electrofishing

Method of collecting fishes that uses electricity to stun them, commonly used for sampling populations during scientific surveys. Causes no permanent harm to fishes when carried out properly.

Used in 1 profile

electrogenesis

Production of electrical impulses in living organisms or tissues.

electrogenic

Of or relating to production of electricity in living cells, sometimes used to in reference to fishes able to deliver an electric shock.

Enchytraeus

Genus of annelid worm of which two species, E. albidus and E. buchholzi, are cultured by aquarists to use as fish food.

endobenthic

Dwelling within the sediment at the bottom of a water body.

endocrine

Of, relating to, or denoting glands that secrete hormones or other products directly into the blood: 'the endocrine system'.

endorheic

Used in reference to a closed drainage basins with no outflow to other bodies of water, the bottom of which often contains a salt lake or salt pan. Water leaves only via evaporation or seepage.

Used in 7 profiles

endosymbiont

A symbiotic organism that lives within the body of its host.

epibranchial organ

Present in some microphagous fishes and comprises a paired dorsal diverticulum located towards the posterior of the pharynx. In the majority of species it's divided into two sections by additional gill rakers which trap small food particles.

epithelium

Refers to layers of cells that line hollow organs and glands or make up the outer surface of the body. Epithelial cells help to protect or enclose organs and most produce mucus or other secretions. They're arranged in single or multiple layers, depending on the organ and location.

Used in 24 profiles

eurybenthic

Dwelling on the bottom of a water body over a wide range of depths.

eutrophication

Hypertrophication; process by which addition of artificial or natural substances, such as nitrates and phosphates, to a body of water increases the concentration of dissolved nutrients, this in turn stimulating the growth of aquatic plant life, especially phytoplankton, and typically resulting in depletion of dissolved oxygen. Negative effects include reductions in populations of fishes and other organisms incapable of withstanding this hypoxia.

Used in 8 profiles

excluded name

A name unavailable for purposes of zoological nomenclature under provision of the ICZN code or because of a disclaimer.

exotic species

A species occurring outside its known natural range, most often due to accidental or intentional dispersal by human activities. Also referred to as introduced or alien species.

Used in 19 profiles

fecund

Producing or capable of producing offspring or vegetation. Sometimes used in reference to particularly productive organisms.

Used in 33 profiles

fertile

Capable of reproduction.

Used in 11 profiles

fin-spine

Unsegmented and unbranched, bony structure supporting the fins in teleosts. Usually hard, rigid and pointed and may have a smooth or serrated edge. Not laterally-paired like rays, and in some species modified to form a protective structure.

Used in 15 profiles

fitness

In biology, Darwinian fitness or simply fitness of a biological trait describes how successful an organism has been at passing on its genes. The more likely that an individual is able to survive and live longer to reproduce, the higher is the fitness of that individual.

flank

The side of an animal's body.

Used in 382 profiles

flashing

Term used to describe a fish that is seen to be flicking or brushing its body against solid surfaces. Usually a sign of irritation and sometimes, but not always, a parasitic infestation or disease.