Results for “cc”

interspecific

Existing or occurring between different species. Opposite of intraspecific.

Used in 1 profile

intraspecific

Existing or occurring within a given species. Opposite of interspecific.

Used in 30 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

mangrove tree

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

metabolism

Sum total of the chemical processes occurring in living organisms which are necessary to maintain life.

Used in 1 profile

metamorphosis

A physical change or succession of such changes in form during the life cycle of an organism.

Used in 3 profiles

mode

The value or item occurring most frequently in a series of observations or statistical data. Often quoted in relation to a meristic character or characters.

Used in 34 profiles

mulm

Organic sediment which typically accumulates in an aquarium.

Used in 2 profiles

nano aquarium

Small aquarium of arguable definition. Freshwater nano-aquaria are generally accepted to hold between 5-10 US gallons (4.16-8.32 UK gallons; 18.93-37.85 litres) whereas in the marine hobby any aquarium with a volume of 30 US gallons (24.98 UK gallons; 113.56 litres) is generally considered to be a nano-system. These definitions vary, however. Also known as a nano tank.

Used in 5 profiles

native species

Species occurring in a given region or ecosystem only as a result of natural processes, with no human intervention.

Used in 12 profiles

naturalised

Used in reference to an exotic species that has become successfully established in nature outside of its native range.

Used in 1 profile

neuromastic pitting

Severe physical condition of unconfirmed origin occurring in certain fishes which appears related to poor water quality and/or nutrition. The primary symptom is necrosis of the tissue surrounding neuromasts on both the head and body and if left unchecked the disorder can result in death. Similar to, but not analagous with, head and lateral line erosion, and does not appear to occur in nature.

Used in 1 profile

niche

The position or role occupied by an organism within an ecological community.

Used in 39 profiles

nitrates

Any salt or ester of nitric acid, and the end product of the portion of the nitrogen cycle taking place in most closed aquarium systems (the conversion of nitrates to nitrogen gas in natural systems is carried out by anaerobic microorganisms not normally present in sufficient numbers in aquaria, though this process can be induced by installation of a nitrate reactor). While nitrates are less toxic than ammonia or nitrites, they are still potentially harmful to fishes and other aquatic organisms if allowed to accumulate unchecked, and must therefore be diluted via regular water changes. Aquatic plants also help since they are able to metabolise nitrates to an extent.

Used in 20 profiles

Nitrobacter

Genus of bacteria previously thought to reduce nitrIte to nitrAte in an aquarium, but which does not occur, or occurs in negligible quantities, in aquaria.

nomenclature

Branch of taxonomy concerned with the application of scientific names to taxa, based on a particular classification scheme and in accordance with agreed international rules and conventions.

Used in 5 profiles

non-native

Used in reference to a species occurring, living, or growing in a region outside its natural geographic range; non-indigenous.

Used in 28 profiles

nuptial

Of, relating to, or occurring during the breeding season.

Used in 119 profiles

oedema

Excess and subsequent accummulation of watery fluid in cells, tissues, or body cavities of an organism. Also spelled 'edema'.

Oodinium

Genus of parasitic dinoflagellates occurring in marine and freshwater fishes and sometimes referred to as Piscinoodinium or 'velvet disease'.

Used in 7 profiles