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Results for “spawn”

Ichthyological terms, not general ones.

Species 28Articles 8Glossary 31

  • spawn

    The eggs of fishes and other aquatic organisms; to deposit and fertilise such eggs.

    Used in 673 profiles

  • spawning migration

    Migration of fishes to a spawning site or area, occurring in certain fishes. Variable in extent.

    Used in 10 profiles

  • spawning substrate

    Particular substrate type required by a given egg-laying fish species for the purpose of spawning.

    Used in 9 profiles

  • spawning

    The act of releasing and fertilising eggs in fishes.

    Used in 988 profiles

  • batch spawner

    A fish species which deposite eggs on more than a single occasion throughout a particular spawning season rather than within a short period.

  • serial spawner

    A fish species spawning in multiple bursts within a given period, typically in response to some environmental stimulus or cue, e.g., rainfall.

  • synchronous spawning

    Spawning behaviour in which all individuals of a species spawn in unison, normally as a result of some environmental trigger or cue.

  • broadcast spawner

    A fish which releases its gametes into open water for external fertilisation, with no subsequent parental care. The strategy is more commonly-seen in marine than freshwater species.

  • fractional spawner

    A fish species in which females release eggs at intervals over a given period.

    Used in 21 profiles

  • batch fecundity

    The number of eggs released by a serial spawner during a single spawning event.

  • amphidromy

    A form of diadromy in which fishes migrate between fresh and marine water as part of their life cycle for some purpose other than spawning, e.g., newly-hatched, arvae may be swept downstream into the sea where they spend a period of time before migrating back into fresh water to mature and eventually reproduce.

    Used in 15 profiles

  • anadromous

    Migrating from marine to freshwater environments in order to spawn, as many salmonids do for example.

  • breeding cycle

    In fishes, the period of time between hatching and first spawning within a particular generataion.

    Used in 3 profiles

  • breeding tubercle

    Raised, epidermal structures developing on the head, body or fin rays during the spawning season in some fishes. Usually occur only in males, and sometimes referred to as 'nuptial tubercules'.

  • clutch

    Used in ichthyology to refer to the number of eggs deposited in a single spawning event, particularly when some form of nest is used.

    Used in 10 profiles

  • contact organ

    Dermal, bony growth or spicule normally protruding from one or more fin rays or scale margins. Present on parts of the body or fins that come into contact with the female during spawning in males of some fishes.

    Used in 9 profiles

  • courtship

    Any behavioural interaction between male and female individuals which leads to or initiates spawning.

    Used in 264 profiles

  • courtship ritual

    Complex, genetically-determined sequence of behaviour, usually employing a combination of visual, auditory and chemical stimuli taking place before spawning. Either or both sexes may be the protagonist.

    Used in 2 profiles

  • cuckoldry

    Behavioural strategy seen in certain nest-building fishes in which one or more males that are not an accepted part of a spawning event fertilise some eggs. Such individuals are commonly referred to as sneaker, sneaky or satellite males.

  • egg scatterer

    A species spawning above the bottom which scatters demersal eggs randomly.

    Used in 81 profiles