Navigation Links
Why do cold animals make bigger babies?

Reproduction involves a critical decision: Should an organism invest energy in a few large offspring or many small ones? In a new study from The American Naturalist, Michael Angilletta (Indiana State University), Chris Oufiero (University of California, Riverside), and Adam Leaché (University of California, Berkeley) used a new statistical approach that can test multiple theories at the same time, an approach they hope will shed light on many evolutionary problems. They used data from many populations of Eastern Fence Lizards (Sceloporus undulatus), which revealed that the lizards in colder environments produce larger offspring than lizards in warmer environments.

So why do animals in colder climates produce larger offspring? One theory suggests the larger size of offspring counteracts their slow growth in the cold. Yet another theory suggests large offspring are not directly linked to temperature at all. Instead, large offspring just happen to be produced by large mothers, who grow large because they require more energy to reproduce in the cold.

When they tested the theories simultaneously with their new approach, the team concluded that temperature's effect on reproduction is a byproduct of its effect on adult size. "This result could have widespread significance," says Angilletta. "Temperature determines the adult size of virtually all organisms. For many of these organisms, we expect temperature to also leave an imprint on reproduction."
'"/>

Source:University of Chicago Press Journals


Page: 1

Related biology news :

1. Plants, animals share molecular growth mechanisms
2. Elephants imitate truck noises, other animals
3. Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals
4. Gene therapy for Parkinsons disease moves forward in animals
5. Use of PET can reduce, may eliminate more strenuous drug development trials with animals
6. Undesirable expatriates: Preventing the spread of invasive animals
7. Two new retroviruses—transmitted from animals—identified
8. Stem cell therapy successfully treats heart attack in animals
9. More animals join the learning circle
10. Proposal would allow wild animals to roam North America
11. Research suggests fitness of Florida panthers improved by limited breeding with Texas animals
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Why cold animals make bigger babies

(Date:3/23/2015)... , Mar. 23, 2015 NXT-ID, Inc. (NASDAQ: ... focused on the growing mobile commerce market, announces its biometric ... advertising campaign on CNBC television starting March 30 th ... commence airing in New York markets. ... said: "We are excited about our new ad campaign following ...
(Date:3/19/2015)... 2015  NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... growing mobile commerce market, announces its biometric payment technology, the ... aired this week on Washington DC,s ... a segment "The Next Great Thing", host Laura Evans ... pay, and ,a really big breakthrough in mobile payment.,  ...
(Date:3/16/2015)... Between 16 and 20 ... innovations in biometric identification at the CeBIT exhibition ...      (Photo: http://photos.prnewswire.com/prnh/20150316/735333 ) , ... at the forefront: the company,s all new BiometricGate ... Germany . BiometricGate is the first ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 2NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 3NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 2NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 3DERMALOG Presents its Latest Biometric Innovations at the Hannover CeBIT Exhibition, 16 - 20 March 2015 2DERMALOG Presents its Latest Biometric Innovations at the Hannover CeBIT Exhibition, 16 - 20 March 2015 3
... are on the verge of unleashing the power of the ... as decades of research begins to bear fruit. Boron has ... but is now attracting fast growing research interest and investment ... to tackle cancer and infectious diseases, potentially overcoming limitations and ...
... emissions is not the only threat to the planet. Changes ... widespread use of fertilizers, are also damaging both water quality ... Brush, from Johns Hopkins University in Baltimore, USA, in her ... large estuary on the Atlantic coast of the USA. Her ...
... has consisted in the development of class antagonismsthe exploitation ... Karl Marx and Frederick Engels, The Communist Manifesto ... group well being, it also may increase the potential ... control: which individuals gain the spoils and which toil ...
Cached Biology News:European researchers harness unique properties of boron to develop new drugs and diagnostics 2European researchers harness unique properties of boron to develop new drugs and diagnostics 3Fertilizers -- a growing threat to sea life 2Caste in the colony 2
(Date:3/30/2015)...  NuGene International, Inc. ("NuGene") (OTCQB: NUGN), announced ... has added another internationally recognized researcher to its ... internationally recognized researcher in bio-inspired materials and bio-materials ... University, China , Professor Guan ... North Carolina, Chapel Hill. Following a postdoctoral training ...
(Date:3/30/2015)... March 30, 2015    Intrexon Corporation ... biology, and Merck Serono, the biopharmaceutical business of ... today announced an exclusive strategic collaboration and license ... T-cell (CAR-T) cancer therapies. This collaboration advances Merck ... that modulate the immune system,s natural ability to ...
(Date:3/30/2015)... LONDON , March 30, 2015 ... Patienten auf    Richmond Pharmacology ist das ... Nationalen Amyloidose-Zentrum am Royal Free Hospital in ... Phase-3-Studie zur Untersuchung eines RNAi-Therapeutikums Studienversuche an einem ... Behandlung von Transthyretin vermittelter Amyloidose entwickelt (ATTR), einer ...
(Date:3/29/2015)... 2015 As a symbol of its ... our pharmaceutical manufacturing clients, Whitehouse Laboratories is excited to ... Berkenstock Race Team for the 2015 race season. Success ... but a strong sense of precision and attention to ... success in the quality control testing laboratory. Sponsorship of ...
Breaking Biology Technology:UCI Professor Zhibin Guan Joins NuGene Advisory Board 2UCI Professor Zhibin Guan Joins NuGene Advisory Board 3Intrexon and Merck Serono Announce Agreement for the Development and Commercialization of CAR-T Therapy 2Intrexon and Merck Serono Announce Agreement for the Development and Commercialization of CAR-T Therapy 3Intrexon and Merck Serono Announce Agreement for the Development and Commercialization of CAR-T Therapy 4Whitehouse Laboratories Reaffirms Commitment to Speedy Results – Renews Sponsorship of Berkenstock Racing Team 2
... Andrew Ryan Varian Australia Pty. Ltd., Mulgrave, 3170, Victoria, ... , The role of major, minor ... area of scientific research. In particular, research on the value of trace ... , The advent of atomic absorption ...
... Inc. , Introduction ... veterinary drugs. The use of these in food production is already ... the European Union because of a possible increased cancer-risk through long-term ... nitrofurans contamination has been found in warm-water prawns, shrimp, and chicken. ...
... in the yeast Saccharomyces cerevisiae : Detection in vivo using ... Paul Gavin# and Mark Prescott # , Ph.D , ... # Department of Biochemistry and Molecular Biology, Monash University, , ... * Technical assistance: Varian Australia Pty Ltd, Mulgrave, Victoria 3170, , ...
Cached Biology Technology:Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 2Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 3Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 4Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 5Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 6Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 7Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 8Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 9Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 10Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 11Analysis of Blood Serum on the Liberty Series II ICP-AES with the axially-viewed plasma 12Analysis of Nitrofurans Metabolites by Positive Ion Electrospray LC/MS/MS 2Cytosolic expression of Green Fluorescent Protein (GFP) and its derivatives , in the yeast Saccharomyces cerevisiae: Detection in vivo using , the Varian Cary Eclipse 2Cytosolic expression of Green Fluorescent Protein (GFP) and its derivatives , in the yeast Saccharomyces cerevisiae: Detection in vivo using , the Varian Cary Eclipse 3Cytosolic expression of Green Fluorescent Protein (GFP) and its derivatives , in the yeast Saccharomyces cerevisiae: Detection in vivo using , the Varian Cary Eclipse 4Cytosolic expression of Green Fluorescent Protein (GFP) and its derivatives , in the yeast Saccharomyces cerevisiae: Detection in vivo using , the Varian Cary Eclipse 5
Rab1A...
... LYZL6 ( Abpromise for all ... Synthetic peptide: DWLCL AFVE SKFNISKINE ... to amino acids 46-100 of Human ... ID: 57151 ...
Request Info...
Mouse monoclonal [DJR3] to DcR1 (Phycoerythrin) ( Abpromise for all tested applications). entrezGeneID: 8794 SwissProtID: O14798...
Biology Products: