Results for “ich”

ICZN Code

The International Code of Zoological Nomenclature, the current edition of which is located here.

Used in 1 profile

Indian almond leaf

Vernacular name for leaves of the leadwood tropical tree species Terminalia catappa which are commonly sold dried for use in aquaria because the organic compounds contained within them are considered beneficial for certain fish species. In particular they may aid in simulation of blackwater conditions and inhibit the growth of some undesirable microorganisms, as well as proving an effective addition to a natural-looking display. Also known as Ketapang leaf, presumably in reference to the city of that name in West Kalimantan province, Indonesian Borneo.

Used in 10 profiles

infusoria

Collective term for certain members of the protozoan Phylum Ciliophora, of which it is considered a subclass in certain classification systems. Members naturally inhabit infusions of decomposing organic material and some are cultured by aquarists in order to feed very small fish fry. The name was formerly applied to a much larger group of aquatic microorganisms which also included some other protist groups and unicellular algae.

Used in 186 profiles

insertion

Point on the body of a fish at which emerges the front or rear edge of a fin.

Used in 42 profiles

intromittent

Used in reference to a modified fin of a male which aids in transfer of gametes to the female during reproduction.

Used in 4 profiles

kleptoparasitism

Feeding behaviour in which one organism robs food from another that has previously caught, collected or otherwise prepared it.

lateral line scale

Any visibly-pored scale of the lateral line system, counts of which are often used as an identifying feature.

Used in 164 profiles

lecithotrophy

Literally, 'feeding on yolk'. A form of development in which an embryo receives no nutrition other than the yolk contained within its egg.

Used in 1 profile

leucism

Condition in which all types of skin pigment are reduced due to defects in pigment cell differentiation with the normal result a partially (often referred to as 'pied' or 'piebald'), or more rarely, completely white animal. Differs from albinism, which is caused by a lack of melanin only, in several ways, with one of the most apparent being that albino animals typically have red eyes whereas leucism does not normally affect eye colour. Pronounced, and sometimes spelled, leukism.

Llanos

Refers to 'Los Llanos', a wide expanse of tropical grassland located east of the Andes mountains in Venezuela and Colombia. Much of the area undergoes significant seasonal fluctuations in water level due to flooding of the Río Orinoco which flows through it.

Used in 13 profiles

mantle

Protective layer of epidermis in molluscs from which the shell is secreted in many species.

matrotrophy

Reproductive strategy in which the embryo is supplied with additional nutrition from the mother, applied to some viviparous fishes.

Used in 1 profile

metabolism

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

Used in 1 profile

micropyle

Tiny opening in an egg through which spermatozoa can enter.

mouth-brooder

Used in reference to fishes which brood or protect their eggs or offspring in the mouth of one or both parents.

Used in 5 profiles

mulm

Organic sediment which typically accumulates in an aquarium.

Used in 2 profiles

mutualism

Symbiosis from which both organisms involved derive some benefit.

Mycobacterium

Genus of gram-positive bacteria of the family Mycobacteriaceae, members of which cause tuberculosis in fishes and other animals.

Mysis

Genus of mysid crustacean of which members inhabit both marine and freshwater environments. Some species are used as fish food in aquaria, and usually available frozen.

Used in 21 profiles

natural selection

Term introduced by Charles Darwin referring to the nonrandom mechanism of evolution by which certain biological traits become either more or less common in a population due to differential, environmentally-influenced reproduction. Better-adapted individuals tend to produce more offspring, thus the population evolves, and this process can result in populations that gradually become specialised to inhabit particular ecological niches and can eventually result in the emergence of new species.