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Results for “species”

Ichthyological terms, not general ones.

Species 1,312Articles 27Glossary 243

  • humeral spot

    A marking on the body in the area analogous to the humerus, or shoulder. In fishes it's normally located above the pectoral-fin and behind the opercle. There may be more than a single such spot in some species.

    Used in 42 profiles

  • hybridisation

    The process of crossing different species or populations of organisms in order to produce hybrids.

    Used in 115 profiles

  • hydrometer

    Instrument used to measure the density of a liquid, normally in the form of specific gravity. Can be inaccurate should calcium deposits form on the swing arm, for example, and generally less reliable than a refractometer.

  • identification key

    Printed or computer-aided table or other device assisting identification of species. Normally presented in the form of a single-access key.

    Used in 4 profiles

  • induced breeding

    Artificially stimulating a fish species to reproduce in captivity.

    Used in 1 profile

  • interbreed

    To breed with another race or species; hybridise.

    Used in 11 profiles

  • interdorsal

    In species possessing more than a single dorsal fin, the space between the first and second fins.

  • 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

  • isopod

    Any member of the crustacean order Isopda, comprising species with 7 pairs of legs and lacking a fully-formed carapace.

    Used in 1 profile

  • IUCN Red List

    Global inventory of the conservation status of species maintained by the IUCN.

    Used in 19 profiles

  • juvenile

    Not yet fully mature though mostly similar in form to an adult specimen; young.

    Used in 400 profiles

  • lamina circularis

    Bony process or plate at the base of the first ( unbranched ) and second ( first branched ) ray of the pectoral-fin in most male specimens of the family Cobitidae. It is also known as 'Canestrini's scale'.

    Used in 24 profiles

  • lectotype

    In zoological nomenclature, a syntype specimen selected as the name-bearing type of a nominal taxon in the absence of a designated holotype.

    Used in 6 profiles

  • lepidophage

    A species practicing lepidophagy.

    Used in 9 profiles

  • limnivore

    An organism feeding on mud, or more specifically, other organisms that dwell within the substrate.

  • livebearer

    A fish species exhibiting ovoviviparity or viviparity.

    Used in 234 profiles

  • mantle

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

  • migration

    A journey between different regions or countries at specific times of year.

    Used in 56 profiles