Gonad Morphology in Hermaphroditic Gobies

Cole, Kathleen S.

doi:10.1525/california/9780520264335.003.0005

Cited by 13 publications

(35 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Detailed histological descriptions of gonadal sex change have been made for numerous species representative of protandrous [Godwin, 1994;Guiguen et al, 1994; reviewed by Lee et al, 2001;Wu et al, 2010a], protogynous [Nakamura et al, 1989;Lo Nostro et al, 2003;Muncaster et al, 2013; reviewed by Liu et al, 2016], and bidirectional ; reviewed by Cole, 2010Cole, , 2011Kuwamura et al, 2015] hermaphrodites. There is considerable diversity in gonadal configuration and ontogeny among different sequentially hermaphroditic lineages, which closely follows phylogenetic lines and reflects the multiple independent evolutionary origins of hermaphroditism [Sadovy de Mitcheson and Liu, 2008;Cole, 2010]. In many sequential hermaphrodites, recognisable tissues of both sexes are present in the gonad prior to sex change, whereas in others, reproductive tissues are completely replaced by those of the secondary sex.…”

Section: Gonadal Sex Changementioning

confidence: 99%

“…2 C), with either portion being reproductively fully functional and so characterising the current sexual phenotype Cole, 2010Cole, , 2011Kuwamura et al, 2015]. Maintaining a bisexual gonad affords these species the flexibility to rapidly adjust their sexual phenotype (e.g., 7 days in T. okinawae , Sunobe et al [2005]) and exploit any reproductive opportunity, consecutively if necessary.…”

Section: Gonadal Sex Changementioning

confidence: 99%

“…This varies from the undelimited ovotestis of Eviota gobies, where male and female cells are intermixed, to an increasingly complex and compartmentalised organ (as in Lythrypnus , Trimma , Gobiodon and Paragobiodon spp.) [for review, see Cole, 2010].…”

Section: Gonadal Sex Changementioning

confidence: 99%

See 2 more Smart Citations

Bending Genders: The Biology of Natural Sex Change in Fish

Todd

Hui

Muncaster

et al. 2016

Sex Dev

117

126

View full text Add to dashboard Cite

Sexual fate is no longer seen as an irreversible deterministic switch set during early embryonic development but as an ongoing battle for primacy between male and female developmental trajectories. That sexual fate is not final and must be actively maintained via continuous suppression of the opposing sexual network creates the potential for flexibility into adulthood. In many fishes, sexuality is not only extremely plastic, but sex change is a usual and adaptive part of the life cycle. Sequential hermaphrodites begin life as one sex, changing sometime later to the other, and include species capable of protandrous (male-to-female), protogynous (female-to-male), or serial (bidirectional) sex change. Natural sex change involves coordinated transformations across multiple biological systems, including behavioural, anatomical, neuroendocrine, and molecular axes. We here review the biological processes underlying this amazing transformation, focussing particularly on its molecular basis, which remains poorly understood, but where new genomic technologies are significantly advancing our understanding of how sex change is initiated and progressed at the molecular level. Knowledge of how a usually committed developmental process remains plastic in sequentially hermaphroditic fishes is relevant to understanding the evolution and functioning of sexual developmental systems in vertebrates generally, as well as pathologies of sexual development in humans.

show abstract

Section: Gonadal Sex Changementioning

confidence: 99%

Section: Gonadal Sex Changementioning

confidence: 99%

See 1 more Smart Citation

Bending Genders: The Biology of Natural Sex Change in Fish

Todd

Hui

Muncaster

et al. 2016

Sex Dev

117

126

View full text Add to dashboard Cite

show abstract

“…Hence, phylogeny does not rule out the potential for E. lori to change sex. The lack of size dimorphism between immature males and females (Warner et al ., , Policansky, ; Sadovy & Shapiro, ), however, as well as gonad histology, which is typical of other gonochoristic gobiid species (Cole, , ), support the conclusion that E. lori is gonochoristic and does not change sex.…”

Section: Discussionmentioning

confidence: 74%

Life‐history transitions of the coral‐reef fishElacatinus lori

Rickborn

Buston

2015

Journal of Fish Biology

View full text Add to dashboard Cite

The purpose of this study was to investigate the life-history transitions of the line snout goby Elacatinus lori, a coral-reef fish endemic to Belize. Specifically, this study aimed to: (1) quantify the length of pelagic larval duration (PLD) and standard length (L ) at settlement, (2) determine the age and L at sexual maturity and (3) if applicable, determine the age, L and direction of sex change. Otolith analysis was used to determine PLD, age and L at settlement, while gonad histology and morphological data were used to determine age and L at maturity. It was found that: (1) estimates of PLD ranged from 18·8 to 24·8 days, with a mean ± s.d. of 20·9 ± 1·3 days, and estimated L at settlement ranged from 7·4 to 9·4 mm, with a mean ± s.d. of 8·1 ± 1·7 mm, (2) estimates of L at which 50% of females and males are mature were 31·1 and 32·4 mm, which represents 65·4 and 55·3% of their maximum L respectively and (3) that there was no evidence of sex change: E. lori is probably gonochoristic. This study provides the first comprehensive description of these life-history transitions for a species within the genus Elacatinus, the most speciose genus of fishes on Caribbean coral reefs.

show abstract

“…Gonad morphology has been described for four species of Eviota Jenkins 1903: Eviota epiphanes Jenkins 1903 , Eviota afelei Jordan & Seale 1906 , Eviota disrupta Karnella & Lachner 1981 and Eviota fasciola Karnella & Lachner 1981 (Cole, ). The developmental pattern of the gonad for these species is that of a persistent integrated ovotestis in which ova‐producing and sperm‐producing tissues are intermixed and persist as such throughout life (Cole, ). This morphology in which both ovarian and testicular tissues are present and the resulting ovotestis is a permanent, rather than transient, gonadal feature suggests the possibility of serial hermaphroditism (Cole, ).…”

mentioning

confidence: 99%

Gonad morphology of Susan's dwarfgoby Eviota susanae

Schemmel

Cole

2016

Journal of Fish Biology

View full text Add to dashboard Cite

The gonad morphology of a dwarfgoby Eviota susanae was described and compared with other species within the genus. Eviota susanae was found to have a persistent integrated ovotestis form of gonad in which both spermatogenic and oogenic tissue were found interspersed throughout the gonad. This is consistent with previously described species of Eviota, suggesting that gonad morphology is conserved across the genus.

show abstract

Gonad Morphology in Hermaphroditic Gobies

Cited by 13 publications

References 0 publications

Bending Genders: The Biology of Natural Sex Change in Fish

Bending Genders: The Biology of Natural Sex Change in Fish

Life‐history transitions of the coral‐reef fishElacatinus lori

Gonad morphology of Susan's dwarfgoby Eviota susanae

Contact Info

Product

Resources

About