Results for “RNA”

breeding line

A group of identical, pure-breeding diploid or polyploid organisms, distinguished from others of the same species by a unique phenotype and genotype. Important in production of line breeding ornamental fish strains.

broadcast spawner

A fish which releases its gametes into open water for external fertilisation, with no subsequent parental care. The strategy is more commonly-seen in marine than freshwater species.

brown algae

Vernacular term commonly used in zoology when referring to the largely marine class Phaeophyceae which includes many seaweeds, and in the aquarium hobby to describe growths of brown, diatomic algae.

Used in 1 profile

bycatch

Species other than the target caught incidentally when fishing with a net. Sometimes used when referring to aberrant specimens exported among shipments of wild-collected ornamental fishes.

Used in 49 profiles

Cenozoic (Era)

Current and most recent of the three Phanerozoic geological eras, immediately following the Mesozoic Era and covering the period from 65.5 mya to the present. Also known as the 'Age of Mammals' due to the great diversification occurring among that group, it's divided into three periods: Paleogene, Neogene, and Quaternary; and seven epochs: Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, and Holocene.

Used in 8 profiles

cirrus

Slender, hair-like, usually flexible appendage such as the arm of a barnacle or fused groups of cilia seen in some protozoans.

Used in 1 profile

CITES

Abbreviation for the Convention on International Trade in Endangered Species. Drafted in the 1970s to ensure that international trade in wild animals and plants does not threaten the survival of the species in the wild.

Used in 3 profiles

cleithral spot

Variably-sized (depending on species), usually dark marking present in the cleithral area dorsal to the pectoral fin insertion. Normally visible externally in llive specimens.

Used in 17 profiles

common name

Informal, vernacular name for a fish or other organism. Often varies by language, place or time.

Used in 104 profiles

costiasis

Disease of freshwater fishes caused by species of parasitic flagellate protozoa from the genus Ichthyobodo and more accurately referred to as ichthyobodiosis. It attacks the gills, fins and skin with symptoms including an increase body mucus secretion giving rise to the vernacular term 'skin slime disease'. Can be treated using proprietary products but frequently fatal otherwise.

crustacean

Any member of the predominantly aquatic arthropod grouping Crustacea which currently contains almost 70,000 recognised species, including all crabs, lobsters, crayfish, shrimp, krill and barnacles. It's difficult to define their characteristics since the group is of arguable hierarchical status, generally regarded to represent either a Phylum or Subphylum.

Used in 421 profiles

Daphnia

Any representative of the genus Daphnia; small, planktonic crustaceans commonly referred to as 'water fleas' and often used as food for ornamental fishes. They're members of the order Cladocera and reproduce by parthenogenesis.

Used in 749 profiles

diapause

Period of suspended development in an organism characterised by greatly reduced metabolic rate; resting phase. Especially common under times of environmental stress, e.g., hibernation, aestivation.

Used in 3 profiles

dichotomous key

Species identification key comprising pairs of alternative choices arranged in a series of couplets, used commonly in ichthyological papers.

exoskeleton

External skeleton, often forming a hard, shell-like outer covering typical in insects, crustaceans and some molluscs. Usually chitinous but may also be composed primarily of calcium carbonate or silica.

eyed egg

A fish egg within which the embryo has developed to a point whereby the eyes are visible through the external membrane.

fish bag

Bag made of plastic or other material. Used for transporting ornamental fishes.

Used in 12 profiles

Flubendazole

Antihelmintic chemical used as treatment against internal, parasitic worms.

Used in 1 profile

genitalia

The reproductive organs, especially used in reference to external sex organs.