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:10/16/2014)... Post-menopausal women experienced improvements in vaginal atrophy, with ... bleeding, after 12 weeks of daily 10 milligram ... nutritional supplement previously shown to help relieve certain ... study reported in a poster at the North ... , "These data documented improved vaginal epithelium, without ...
(Date:10/15/2014)... has admitted Johannes Gutenberg University Mainz (JGU) as ... hub continues to maintain a significant nationwide standing ... "The acceptance of Johannes Gutenberg University Mainz as ... milestone in the national and international competition for ... of Rhineland-Palatinate can be proud that Mainz University ...
(Date:10/15/2014)... 15, 2014   Neurotechnology , a provider ... availability of the VeriLook Surveillance 3.0 software ... real-time biometric face identification using live video streams ... The new version not only identifies faces in ... objects while they are moving through the video ...
Breaking Biology News(10 mins):S-equol supplements associated with improved measures of reproductive health in postmenopausal women 2Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 2Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 3VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 2VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 3
... deadline of February 4th is only one week ... most important international osteoporosis meeting of the year, ... abstract online:, http://www.iofwco-ecceo10.org/abstracts/ Abstracts ... Osteoporosis International, with opportunity for poster presentation. Authors ...
... Australia,s own distinctive red soils could play a part in ... often shovelled off east coast beaches in summer., A QUT ... iron, which gives our iron-rich soil its red colour, reaches ... only have a foul smell, but also make our eyes ...
... 28, 2010) Many of the health benefits of aerobic ... than weeks, months and even years of exercise training), and ... the food we eat afterwards, according to a study published ... ). "Differences in what you eat after exercise produce ...
Cached Biology News:Is iron from soil a factor in algal blooms? 2What you eat after exercise matters 2What you eat after exercise matters 3
(Date:10/22/2014)... 22, 2014 WriteResult, LLC – ... has been working with a team of researchers from ... Farms Community Farming Collaborative to provide electronic questionnaire data ... The study, which started in May, aims to evaluate ... participants weekly exposure to and participation in urban agriculture ...
(Date:10/22/2014)... (PRWEB) October 22, 2014 According ... Market by Service Type (Consulting, Integration, Deployment & ... by Deployment Model (Public, Private, Others (Hybrid & ... MarketsandMarkets, defines and segments the Cloud Professional Services ... and forecasting of revenues. It also identifies the ...
(Date:10/22/2014)... , Oct. 22, 2014 Research and ... Electronics Market by Material, by Application, Geography - Global ... their offering. Organic electronics, also called ... of material science which deals with small conductive molecules ... because small molecules and polymers are carbon based, made ...
(Date:10/20/2014)... 20, 2014 Convey Computer , ... team from Iowa State University won first place in ... a Convey HC-2ex, the team’s solution achieved the highest ... than the second place finisher. , Experts from all ... the month long challenge, using a variety of design ...
Breaking Biology Technology:myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5Global Organic Electronics (Semiconductor, Conductive, Dielectric and Substrate) Market - Analysis and Forecast (2014 - 2020) 2Global Organic Electronics (Semiconductor, Conductive, Dielectric and Substrate) Market - Analysis and Forecast (2014 - 2020) 3Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 2Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 3
... Something that was always taken for granted was the quality ... Sprint commercials, they emphasized that "you can hear a pin ... infrastructure. , ,The old Bell system also had very ... from analog to digital lines with digital repeaters (amplifiers) that ...
... multi-national corporations have decided to lease space in the ... and Eaton Corp. will have sales offices in ... management for Irgens Development Partners, LLC . , ... a global manufacturer of automotive systems, plans to open a ...
... Wis. - In what many in state government consider ... for the consolidation of computer servers in state government, but ... according to State CIO Matt Miszewski. , ,The revised timetable ... large agencies, the Department of Corrections and the ...
Cached Biology Technology:Is traditional voice quality an oxymoron with today's cellular, VoIP? 2Is traditional voice quality an oxymoron with today's cellular, VoIP? 3State alters schedule for server consolidation 2State alters schedule for server consolidation 3State alters schedule for server consolidation 4
Mouse monoclonal antibody raised against a partial recombinant ZNF155. NCBI Entrez Gene ID = ZNF155...
... macroporous polystyrene beads for hydrophobic interaction chromatography. ... adsorbing organics of molecular weight less than ... useful for the adsorption of nonpolar substances ... removal of detergents such as Triton X-100 ...
... : Fusion protein corresponding to ... human Mi-2 Formulation: 0.7M Tris-glycine, ... sodium azide, containing 30% glycerol ... immunoblot on Hela nuclear extract ...
... Phospho-Specific(Thr 222 ) ... 10 mM sodium HEPES, 100 ... 7.5. Recognizes the ~47 kDa ... (MAPKAPK-2) protein phosphorylated at Thr ...
Biology Products: