Diversity and plasticity of sex determination and differentiation in fishes.
Sex Dev
; 7(1-3): 115-25, 2013.
Article
en En
| MEDLINE
| ID: mdl-22948719
ABSTRACT
Among vertebrates, fishes show an exceptional range of reproductive strategies regarding the expression of their sexuality. Fish sexualities were categorized into gonochorism, synchronous/sequential hermaphrodite, or unisexual reproduction. In gonochoristic fishes, sex is determined genetically or by environmental factors. After sex determination, the gonads are differentiated into ovary or testis, with the sex remaining fixed for the entire life cycle. In contrast, some sequential hermaphrodite fishes can change their sex from male to female (protandrous), female to male (protogynous), or serially (bi-directional sex change) in their life cycle. In many cases, sex change is cued by social factors such as the disappearance of a male or female from a group. This unique diversity in fishes provides an ideal animal model to investigate sex determination and differentiation in vertebrates. This review first discusses genetic-orientated sex determination mechanisms. Then, we address the gonadal sex differentiation process in a gonochoristic fish, using an example of the Nile tilapia. Finally, we discuss various types of sex change that occur in hermaphrodite fishes.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Diferenciación Sexual
/
Procesos de Determinación del Sexo
/
Peces
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Sex Dev
Asunto de la revista:
CIENCIAS DO COMPORTAMENTO
Año:
2013
Tipo del documento:
Article
País de afiliación:
Japón