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Results for “fertility”

Ichthyological terms, not general ones.

Species 2Articles 0Glossary 19

  • fertility

    The state of being fertile.

    Used in 3 profiles

  • fertile

    Capable of reproduction.

    Used in 11 profiles

  • annual fish

    A fish species which naturally completes its life cycle within a year at the end of which it dies leaving behind fertile eggs which typically survive in the soil and hatch during the next rainy season. Often used in reference to certain South American and African killifishes.

    Used in 4 profiles

  • aplacental viviparity

    Also known as ovoviviparity. Method of reproduction employed by certain fishes in which the eggs are fertilised and develop inside the female but there is no placental connection. The juveniles are free-swimming and able to feed as soon as they leave the female's body.

  • 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.

  • biological species concept

    Most popular concept of species in vertebrate zoology. Defines species as members of populations that do or potentially could interbreed and produce fertile offspring in nature, regardless of appearance, therefore somewhat more restrictive than the phylogenetic species concept. In theory species are thus separated from one another by some form of reproductive isolation, though in practice this does not always hold true. Often abbreviated to BSC.

  • 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.

  • bubble nest

    Aggregation of air-filled bubbles blown via use of an oral secretion constructed by males in some fish species. Such nests usually float and sometimes contain pieces of plant material for improved solidity. Fertilised eggs are deposited and incubated inside the nest and typically guarded by the male.

    Used in 27 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.

  • gamete

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

  • incubation period

    Period of time between fertilisation and hatching.

    Used in 122 profiles

  • ovoviviparity

    Reproductive strategy in which fertilisation occurs internally and the eggs develop inside the body of the mother until hatched, at which point live offspring are born. There is no placental connection between mother and embryo unlike in viviparous species.

  • sibling species

    One of two or more very closely-related species that are reproductively isolated from one another but almost indistinguishable in morphologically and/or behaviourally. May occur sympatrically and even interbreed but are incapable of producing fertile hybrid offspring. Sometimes referred to as cryptic species.

    Used in 3 profiles

  • sneaker male

    Subdominant male individual of certain fish species that attempts to sneak into the nest of a spawning pair and fertilise deposited eggs. Typically smaller in size and/or possessing reduced colouration compared with a normal male. Also known as a sneaky male.

  • spawn

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

    Used in 673 profiles

  • spawning

    The act of releasing and fertilising eggs in fishes.

    Used in 988 profiles

  • subspecies

    Taxonomic rank below species, written in the form of a trinomen. Often applied to a geographically-separated population within a species that retains the capability to produce fertile offspring with other populations but may exhibit phenotypic differences.

    Used in 78 profiles

  • ventral-fin basket

    Vernacular nerm used to describe the post-spawning behaviour of cupping or clamping of the ventral fins in order to transport fertilised eggs. Exhibited by females of some Corydoras species, for example.