Results for “pH”

community aquarium

Any aquarium where the fish and other inhabitants are from varied geographic regions.

Used in 244 profiles

convergent evolution

Independant acquisition of the same biological trait in unrelated, monophyletic, lineages as a result of inhabiting similar environments or ecological niches.

Used in 3 profiles

cyclo-ctenoid scale

Scale type with morphology intermediate between cycloid and ctenoid, possessing reduced ctenii that are smooth to the touch. Common to certain groups of fishes, e.g., characids.

Used in 3 profiles

decapod

Any member of the crustacean order Decapoda, comprising species possessing 5 pairs of jointed, thorassic limbs such as crabs, crayfish, lobsters and shrimp. Also used historically in reference to molluscs of the Cephalopod superorder Decapodiformes, members of which have 8 short limbs plus 2 longer tentacles and include cuttlefish and squid.

drip acclimation

Method of acclimation used for sensitive fish species in which the animals are first placed into a clean bucket or other container before water is slowly dripped in by siphon from the aquarium into which they are to be introduced. Can be carried out using a purchased kit or home-made using a length of airline plus an airline clamp.

filter feeding

Feeding behaviour in which solid, organic particles are filtered from the surrounding water. Normally involves some degree of specialised morphology.

Used in 1 profile

foam fractionation

Chemical process whereby hydrophobic molecules are removed from a liquid via rising columns of foam, e.g., the process of organic-waste removal taking place within a protein skimmer.

fungi

Kingdom of eukaryotic microorganisms lacking chlorophyll and vascular tissue and possessing chitinous cell walls. Highly variable in form and includes all yeasts, molds, and mushrooms.

Used in 1 profile

Gammarus

Large genus of amphipod crustacean in the family Gammaridae of which members occur in both fresh and salt water. An important source of food for many fishes.

Used in 2 profiles

Gondwana

Former supercontinent also known as Gondwanaland existing from approximately 510 to 180 Mya and comprising the majority of the landmasses in today's Southern Hemisphere, including Antarctica, South America, Africa, Madagascar and the Australian continent, plus the Arabian Peninsula and Indian subcontinent.

Used in 8 profiles

hydrology

The scientific study of water, its distribution, properties and effects on and within the Earth's surface and atmosphere.

ich

Common name for Ichthyophthirius multifiliis, a protozoan which infects freshwater fish. Commonly referred to as white spot due to the characteristic white nodules formed under the skin or gill tissue during the feeding stage of its life cycle.

Used in 18 profiles

krill

Vernacular term for any small, shrimp-like, marine crustacean of the order Euphausiacea. Represent an important, sometimes principal, proportion of the diet of many marine fishes and mammals. Available as food for ornamental fishes, usually in frozen form.

Used in 14 profiles

labyrinth organ

Highly folded, vascularised, suprabranchial accessory breathing organ formed via extension of the first epibranchial bone and used to respire atmospheric oxygen. Found in all members of the freshwater fish suborder Anabantoidei.

Used in 96 profiles

larva

Immature free-living juvenile form of an organism that undergoes metamorphosis before assuming the adult form.

mangrove

May refer to a mangrove swamp habitat and all species inhabiting it, only the trees and shrubs found in such a habitat, or more specifically, mangrove trees of the genus Rhizophora.

Used in 31 profiles

mangrove tree

Tree or shrub of the families Rhizophoraceae and Verbenaceae or Avicenniaceae chiefly occurring in a mangrove swamp environment.

microsatellite

Section of DNA comprising very short nucleotide sequences repeated many times. Highly polymorphic and used as a marker to determine genetic diversity, identify important genetic traits, analyse relationships, etc..

monoecious

Having both the male and female reproductive organs in the same specimen; hermaphrodite. Opposite of dioecious.

nasal canal

Section of the cephalic lateral line canal anterior to the eyes.