Navigation Links
Fish with temperature-dependent sex determination face global warming
Date:7/29/2008

In vertebrates with separate sexes, sex determination can be genotypic (GSD) or temperature-dependent (TSD). TSD is very common in reptiles, where the ambient temperature during sensitive periods of early development irreversibly determines whether an individual will be male or female. The number of males and females in a population is the sex ratio, a key demographic parameter crucial for population viability.

A number of previous studies have also suggested that TSD may also be very common in many species of fish, with increasing temperatures generally affecting the sex ratio of a species in one of three ways: increased numbers of males, increased numbers of females or increased numbers of males at high and low temperatures, with a balanced sex ratio at intermediate temperatures. However, to elicit a sex-ratio response to temperature, past experiments were often conducted only in the laboratory and not in the field, and the temperatures used were beyond the natural range of temperatures that the species experience in nature.

In a study directed by Francesc Piferrer, from the Institute of Marine Sciences in Barcelona, published in the open-access journal PLoS ONE on July 30, the Spanish researchers used field and laboratory data to critically analyze the presence of TSD in the 59 species of fish where this type of sex determining mechanism had been postulated.

The new study provides evidence that many cases where the observed sex ratio has shifted in response to temperature reveal thermal alterations of an otherwise predominately GSD mechanism rather than the presence of TSD. The results also show that in fish species with TSD, increasing temperatures invariably result in highly male-biased sex ratios. Finally, the researchers show that even small changes of just 1-2C can significantly alter the sex ratio from 1:1 (males:females) up to 3:1 in both freshwater and marine species.

This study shows that TSD in fish is
'/>"/>

Contact: Francesc Piferrer
piferrer@icm.csic.es
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. Researcher provides tool to enable determination of age of anchovies with greater precision
2. Quantitative PET imaging finds early determination of effectiveness of cancer treatment
3. A new explanation for evolutionary changes in genetic sex-determination systems
4. Paying to save tropical forests could be a way to reduce global carbon emissions
5. Durham scientists to tackle CO2 storage in global warming challenge
6. Global warming experts recommend drastic measures to save species
7. Pfizer inks global license to Genomatix Software and databases
8. Duckweed genome sequencing has global implications
9. Ancient oak trees help reduce global warming
10. Global Challenges/Chemistry Solutions debuts with focus on drinking water
11. Ecological globalization
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/5/2014)... Fidel Santamaria, associate professor of biology in the ... researchers in the nation selected to receive a ... Grant for Exploratory Research (EAGER). The funding supports ... support researchers to create new technology that will ... Santamaria, complex behaviors in neuroscience are broken into ...
(Date:11/4/2014)... right amount of death at the right time might ... new research that could help in understanding animal populations, ... In a paper in the journal Trends in ... European colleagues conclude that the kind of positive population ... individuals, or mortality, depends on the size and developmental ...
(Date:11/4/2014)... , November 4, 2014   ... market growth   Fuel3D , a developer ... a funding round totaling $6.4 million (£4 million). This funding ... secured earlier this year and paves the way for the ... The funding round was led by Chimera Partners ...
Breaking Biology News(10 mins):UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3When less is more: Death in moderation boosts population density in nature 2Fuel3D Secures $6.4 Million in Expansion Funding 2Fuel3D Secures $6.4 Million in Expansion Funding 3
... PHOENIX, Ariz. Feb. 5, 2010 The Translational ... a strategic alliance and affiliation agreement with the Van ... capabilities of both non-profit institutes. TGen expects ... aimed at developing new tests and treatments for patient ...
... study of children in Ukraine has found that for ... care and the relationship between children and their caregivers ... their findings, the researchers highlight the importance of comprehensive ... changing caregivers, working schedules and providing training to enhance ...
... Mich. In an effort to eliminate the tropical ... researcher has been awarded $2 million to reformulate an ... their tracks. Charles Mackenzie, a professor of veterinary ... the funding via a larger $13 million grant the ...
Cached Biology News:TGen finalizes alliance with Van Andel Research Institute 2TGen finalizes alliance with Van Andel Research Institute 3For HIV-infected children, quality of caregiver relationship is crucial 2MSU researcher awarded $2 million to tackle parasitic tropical diseases 2
(Date:11/23/2014)... Francis, WI (PRWEB) November 23, 2014 ... manufacturer and supplier of fine chemical ingredients to ... announced the launch of its new website, Apiscent.com. ... description of Apiscent Labs, clean design, easy navigation, ... that make Apiscent Labs stand out. ...
(Date:11/22/2014)... Prominent academics, leaders of the biopharmaceutical ... 3rd at Genetic Rx, a networking conference of ... place at the Joseph B. Martin Conference Center ... present and future of genetic medicines—including siRNA, ASOs, ... well as the treatment of patients with rare ...
(Date:11/22/2014)... Chicago, IL (PRWEB) November 21, 2014 ... technology competitors at the 2014 Emerging Medical Technologies Summit ... MedTech Innovator Awards. Widely regarded among Silicon Valley ... emerging medical device innovation, the win also positions Briteseed ... the MedTech Innovator competition in 2015 and compete with ...
(Date:11/22/2014)... , Nov. 21, 2014  The element of surprise ... diseases, i.e., they strike without warning. Until now, epidemiologists ... of a viral outbreak, resulting in suboptimal responses to ... currently. Photo - http://photos.prnewswire.com/prnh/20141121/160242 ... now been removed because virus gene structural changes have ...
Breaking Biology Technology:Pioneering Academics and Key Industry Leaders to Discuss Rare Diseases and the Emergence of New Genetic Medicines at Genetic Rx on December 3rd 2Insight Product Development Accelerator Member Wins MedTech Innovator Award Competition 2Insight Product Development Accelerator Member Wins MedTech Innovator Award Competition 3Viruses' Advantage of Surprise is Lost 2
... Presentation Scheduled for Monday, March 17th at 11:30am ET, ... KERX ) today announced that I. Craig Henderson, ... Vice President,Medical Affairs, are scheduled to present at the ... The presentation, which will take place on Monday, ...
... Phase 2 Clinical Trial in ... ... today financial results for the year ended December,31, 2007, and highlighted the ... ), During 2007, the Company achieved the following corporate milestones:, ...
... for ... cars, phones, computers, ARGONNE, Ill., ... Laboratory and Toda Kogyo Corp. (Toda) of Japan have,reached a ... patented composite cathode materials for lithium-ion,batteries, which result in longer-lasting, ...
Cached Biology Technology:Keryx Biopharmaceuticals to Present at the Cowen and Company 28th Annual Health Care Conference 2Nventa Biopharmaceuticals Reports Full Year 2007 and Fourth Quarter Financial Results 2Nventa Biopharmaceuticals Reports Full Year 2007 and Fourth Quarter Financial Results 3Nventa Biopharmaceuticals Reports Full Year 2007 and Fourth Quarter Financial Results 4Nventa Biopharmaceuticals Reports Full Year 2007 and Fourth Quarter Financial Results 5Nventa Biopharmaceuticals Reports Full Year 2007 and Fourth Quarter Financial Results 6Nventa Biopharmaceuticals Reports Full Year 2007 and Fourth Quarter Financial Results 7Argonne's Lithium-Ion Battery Technology to be Commercialized by Japan's Toda Kogyo 2Argonne's Lithium-Ion Battery Technology to be Commercialized by Japan's Toda Kogyo 3
... System, Professional Package Superior Protein Detection ... The ProXPRESS 2D Proteomic Imaging System is ... both proteomic and general life science research ... the use of all dyes in the ...
... single use spatulas have been designed to ... are for those interested in eliminating the ... Each spatula is individually packaged, RNase/DNase free, ... is a new product number, created to ...
... digital valve, just 8 mm in width. ... in a single glass-reinforced, PBT (Polybutylene Terephthalate) molded ... width. , Meets a range of pressure requirements ... Satisfies a 0.016 sccm leakage specification (0.2 sccm ...
... versatile system that simultaneously harvests and washes ... into a solid filter supports for analysis ... counter. The FilterMate is ideal for the ... cell proliferation, receptor binding, nucleic acid degradation, ...
Biology Products: