Sex Change In Coral Reef Fish

Fish Physiol Biochem (2005) 31:117122
DOI 10.1007/s10695-006-7595-x

RESEARCH ARTICLE

Sex adjustment in coral reef ?sh
Masaru Nakamura Æ Yasuhisa Kobayashi Æ
Saori Miura Æ Mohamad Ashraful Alam Æ
Ramji Kumar Bhandari

Ã" Springer Science+ production line Media B.V. 2006
Abstract Gonadal speciality can take many
forms in ?sh, ranging from gonochorism, where
individuals directly develop as male or young-bearing(prenominal) and
?nally possess only testis or ovaries at internal maturation, to hermaphroditism where the same
individuals can produce mature male and female
gametes at some time in their lives. Hermaphrodite
?sh are, thus, an excellent model for poring over the
plasticity of hinge upon determination and differentiation in
vertebrates. We have shown that enkindle steroids play a
principal role in sex differentiation and sex switch over in
?sh. Our laboratory implements some(prenominal) ?sh models
that undergo sex transmute from female to male or male
to female or in both directions. In this review, we will
brie?y discuss new advances in our understanding
of the mechanism of sex mixed bag in coral reef ?sh.

M. Nakamura (&) Æ Y. Kobayashi Æ S. Miura Æ
M. A. Alam
Sesoko Station, Tropical Biosphere Research Center,
University of the Ryukyus, Sesoko 3422, Motobu-cho,
Okinawa 907-0227, japan
e-mail: masaru@lab.u-ryukyu.ac.jp
M.



Nakamura
CREST & SORST, Japan Science and Technology
Corporation, Saitama Kawaguchi 332-0012, Japan
R. K. Bhandari
National Institute for Basic Biology, Okazaki 444-8585,
Japan

Keywords Sex variety Æ Estrogen Æ Tropical ?sh Æ
Protogynous sex change Æ Protandrous sex change Æ
Serial sex change
In addition to gonochorism, ?sh exhibit several types of
hermaphroditism. Individuals of some ?shes have gonads containing both mature ovary and mature testis.
well-nigh ?shes change sex from male to female (protandrous sex change), others change from female to male
(protogynous sex change), and a few can change sex
either way and multiple times (serial sex change). In...If you motive to get a full essay, order it on our website: Orderessay



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