sex
See gender. Also used to refer to the process of distinguishing the gender of an individual; sexing.
Used in 304 profiles
Results for “sex”
Ichthyological terms, not general ones.
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