Sex determination follows a temperature reaction norm, if different phenotypic sex ratios are produced as a function of larval/embryonic incubation temperature.
Under FM temperature reaction norm, female bias is found at low temperatures and male bias is found at high temperatures. Temperature thresholds defining "low" and "high" temperatures differ between taxa.
This reaction norm is one of the three main modes of temperature-dependent sex determination, and a similar reaction norm occurs in sex-chromosome bearing ectotherms as well; the latter may be caused by temperature-induced sex reversal, sex-biased mortality or differential fertilization.
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Attribution
0000-0002-0179-1153
Additional context
References:
Valenzuela N & Lance V (2004) Temperature-dependent sex determination in vertebrates. Smithsonian Institution, Washington. 194 pages. ISBN: 1588342034
Nemesházi E & Bókony V (2023) HerpSexDet: the herpetological database of sex determination and sex reversal. Scientific Data 10: 377. DOI: https://doi.org/10.1038/s41597-023-02268-y
Ospina-Álvarez N & Piferrer F (2008) Temperature-dependent sex determination in fish revisited: Prevalence, a single sex ratio response pattern, and possible effects of climate change. PLoS ONE 3(7): 2-4. DOI: https://doi.org/10.1371/journal.pone.0002837
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Preferred term label
FM temperature reaction norm
Synonyms
TSD Ia
Textual definition
Sex determination follows a temperature reaction norm, if different phenotypic sex ratios are produced as a function of larval/embryonic incubation temperature. Under FM temperature reaction norm, female bias is found at low temperatures and male bias is found at high temperatures. Temperature thresholds defining "low" and "high" temperatures differ between taxa. This reaction norm is one of the three main modes of temperature-dependent sex determination, and a similar reaction norm occurs in sex-chromosome bearing ectotherms as well; the latter may be caused by temperature-induced sex reversal, sex-biased mortality or differential fertilization.
Suggested parent term
No response
Attribution
0000-0002-0179-1153
Additional context
References: Valenzuela N & Lance V (2004) Temperature-dependent sex determination in vertebrates. Smithsonian Institution, Washington. 194 pages. ISBN: 1588342034 Nemesházi E & Bókony V (2023) HerpSexDet: the herpetological database of sex determination and sex reversal. Scientific Data 10: 377. DOI: https://doi.org/10.1038/s41597-023-02268-y Ospina-Álvarez N & Piferrer F (2008) Temperature-dependent sex determination in fish revisited: Prevalence, a single sex ratio response pattern, and possible effects of climate change. PLoS ONE 3(7): 2-4. DOI: https://doi.org/10.1371/journal.pone.0002837
Code of Conduct