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Results for “sex”

Ichthyological terms, not general ones.

Species 31Articles 6Glossary 24

  • sex

    See gender. Also used to refer to the process of distinguishing the gender of an individual; sexing.

    Used in 304 profiles

  • sex ratio

    The ratio of males to females in a given population. Often used to describe the same ratio in a batch of captive-bred fishes.

    Used in 5 profiles

  • sexing

    The process of distinguishing the gender of an individual.

    Used in 30 profiles

  • sexual dichromatism

    Difference in colour pattern between males and females of a single species.

    Used in 4 profiles

  • sexual dimorphism

    Phenotypic difference between males and females of a single species. Used in species profiles here on SF to refer to differences in morphology or colour pattern, but officially also refers to behavioural differences.

    Used in 99 profiles

  • asexual reproduction

    Mode of reproduction which does not involve fertilisation whereby offspring derive from a single parent and inherit genes only from that parent. Known in the Amazon Molly, Poecilia formosa, and some other fish species.

  • unisexual

    Fish species of which all individuals are the same gender.

  • nuchal hump

    A protruding growth of tissue found on the head in sexually-mature, usually male, specimens of certain fishes.

    Used in 42 profiles

  • broodstock

    A group of sexually mature fish maintained specifically for production of fry.

  • 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

  • dichromatic

    Having two different colour forms independant of sex or age.

    Used in 1 profile

  • gamete

    Cell that fuses with another during fertilization in organisms employing sexual reproduction, e.g., an egg or sperm cell.

  • gender

    The condition of being male or female; sex.

    Used in 49 profiles

  • genitalia

    The reproductive organs, especially used in reference to external sex organs.

  • pheromone

    Chemical secreted by an organism affecting the behaviour or physiology of other individuals of the same species which may function as an alarm or sexual stimulant, for example.

    Used in 2 profiles

  • polymorphism

    The occurrence of different forms, stages, or types in individuals or multiple organisms of the same species independent of sexual variation.

    Used in 2 profiles

  • progenetic

    Undergoing accelerated sexual maturation, often with associated retention of juvenile features in adults.

    Used in 16 profiles

  • promiscuous

    Not selective, especially used in reference to sexual behaviour. Sometimes used in reference to the reproductive behaviour of certain fishes.

  • reproduction

    Production of offspring via a sexual or asexual process.

    Used in 111 profiles

  • subadult

    An individual that has passed through the juvenile stage but not yet developed all adult characteristics, sexual maturity or size.

    Used in 36 profiles