Results for “Solimões”

photosynthesis

Chemical process occurring in the cells of plants, algae and certain other organisms by which carbon dioxide is converted into organic compounds, especially sugars, using the energy from sunlight.

phylogenetic species concept

Species concept based on the evolutionary relationships among organisms, specifically using common ancestry and shared evolutionary history to define species. Under this concept a species is essentially the smallest group of organisms that share a common ancestor and can be distinguished from other such groups via phylogenetic analyses. Each such grouping constitutes a distinct branch on an evolutionary tree. Subspecies tend not to be recognised and it is generally less restrictive than the biological species concept. Often abbreviated to PSC.

Used in 1 profile

pore

Small opening in a surface, especially the skin, through which gases, liquids or microscopic particles are able to pass, or through which a sensory organ obtains information.

Used in 99 profiles

promiscuous

Not selective, especially used in reference to sexual behaviour. Sometimes used in reference to the reproductive behaviour of certain fishes.

quarantine

Period of isolation, often enforced post-import or purchase of new fish(es) in aquaria, in order to prevent transmission of pathogens or parasites.

Used in 14 profiles

Rift Valley lake

Generic term for any lake formed in a rift valley, but often used in specific reference to a group located in the East African rift, particularly those lying in its western and southern sections, i.e., the African Great Lakes. In the aquarium hobby the meaning of the term is typically restricted even further to include just lakes Malawi, Tanganyika, and Victoria, the latter of which is not in fact a rift lake and is located in a shallow depression between the eastern and western branches of the main rift. These three lakes are famous for the high number of endemic fish species inhabiting them, especially members of the family Cichlidae.

river tank manifold

Home-made device used to achieve uni-directional flow in an aquarium when inhabitants naturally occur in high-velocity rivers and streams. Typically, one or more powerheads are located at one end of the aquarium with intakes at the opposite end, these being connected via pipework located under the substrate. Though certainly beneficial, this should not be considered an essential requirement in hill stream-type set-ups, however.

soft water

Water containing low concentrations of mineral salts, especially calcium or magnesium.

Used in 78 profiles

striated

Marked with or otherwise possessing striae or striations, especially when arranged in a parallel series.

Used in 4 profiles

suspensorium

Any structure suspending or holding up another, especially the series of cartilage and bone suspending the lower jaw from the skull.

Used in 12 profiles

territory

In biology, area occupied by an individual, pair or group of animals and often physically defended against others of the same sex or species. May be established on a permanent or temporary basis.

Used in 318 profiles

vascularised

Containing vessels that carry or circulate fluids, especially blood.

Used in 198 profiles

whitebait

Collective term for the young of various fishes, especially herring and sprat. Sometimes used as food for predatory species in aquaria.

Used in 48 profiles

zooxanthella

Any member of the yellow-green algae genus Symbiodinium, comprising unicellular, flagellate protozoa that exist within the cells of other protozoa and some invertebrates, especially corals. They thus form an endosymbiosis in which they can provide up to 90% of the host's energy requirements.