HOME >> BIOLOGY >> NEWS
Ocean invaders in deep time

Much has been made of the economic impacts of recent biological invasions, but what are the implications of invasions in deep time? Luiz Rocha leads geneticists who time travel through ocean environments. The results of their travels, published online in Molecular Ecology, tell us that during warm, interglacial periods, reef-associated fish (goby genus Gnatholepis), leapt around the horn of Africa into the Atlantic, where their range expanded as the world warmed.

"We found that global warming events correspond clearly with major range expansions of gobies from the Indian Ocean into the Atlantic Ocean and subsequently into the Eastern Atlantic," summarizes Rocha. A chilly Antarctic current--the Benguela upwelling system-- surges up along the western coast of Africa acting as a natural barrier, and has prevented most warm water organisms from the Indian Ocean from making it in to the Atlantic for the last 2 million years. But when the world warmed about 150,000 years ago, gobies slipped around the corner of the continent.

Researchers at the Smithsonian Tropical Research Institute, Scripps Institution of Oceanography, Hofstra University and the University of Hawaii, sequenced goby DNA (774 pb of the mtDNA of cytochrome b, to be exact) from the western, central and eastern Atlantic Ocean. They also sequenced DNA from gobies in the same genus from South Africa, from the Cocos Keeling Islands in the eastern Indian Ocean, and from the Cook Islands in the South Pacific. They calculate the approximate amount of time that isolated groups of fish have been separate based on the differences in the DNA between groups.

What evidence do they have that makes them think that Atlantic gobies are invaders? "The Atlantic goldspot goby certainly is a prime candidate-it's the only species of the genus in the Atlantic and there are eight species and subspecies in the Indo-Pacific. It's really similar to a sister taxon in the Indian Ocean," Rocha continues. "
'"/>

Contact: Beth King
kingb@si.edu
202-786-2094 x8216
Smithsonian Tropical Research Institute
13-Oct-2005


Page: 1 2

Related biology news :

1. West African Ocean sediment core links monsoons to global climate evolution
2. Climate change signal detected in the Indian Ocean
3. Ocean observing contracts awarded to UC San Diego and University of Washington
4. Oceans twilight zone may be a key to understanding climate change
5. AAAS Oceans Panel examines advances in science and technology to boost fishery sustainability
6. Ocean governance: Evolving systems
7. Scientists discover new life forms in the Arctic Ocean
8. New study links western wildfires to Atlantic Ocean surface temperatures
9. Ocean temperature predicts spread of marine species
10. Ocean sampling yields environmental sources of coral symbionts
11. Continued warming of the Arctic Ocean

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Ocean invaders deep time

(Date:7/23/2015)... 2015 Aware, Inc. (NASDAQ: AWRE ), a ... results for its second quarter ended June 30, 2015.  ... $4.5 million, a decrease of 33% compared to $6.8 million ... second quarter of 2015 was $0.3 million, or $0.01 per ... diluted share, in the same period a year ago.  ...
(Date:7/21/2015)...  NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... on the growing mobile commerce market and creator ... has filed provisional patent 62/192218 for ... This invention highlights next generation payment technology from ... also the user using unique personal identifiers including ...
(Date:7/13/2015)... 2015 Synaptics Inc. (NASDAQ: SYNA ... today announced sampling of ClearPad ® 4300, ... (TDDI) product targeting smartphones and tablets. This new ... , best-in-class touch controller IP and systems ... in the company,s Japan Design Center. TDDI enables ...
Breaking Biology News(10 mins):Aware, Inc. Reports Second Quarter 2015 Financial Results 2Aware, Inc. Reports Second Quarter 2015 Financial Results 3Aware, Inc. Reports Second Quarter 2015 Financial Results 4Aware, Inc. Reports Second Quarter 2015 Financial Results 5Aware, Inc. Reports Second Quarter 2015 Financial Results 6NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 2NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 3NXT-ID Patents Personalized Tokenized Payments for Next Generation Secure Payment Technology 4Synaptics Announces Sampling of Second Generation TDDI Solutions 2Synaptics Announces Sampling of Second Generation TDDI Solutions 3
(Date:7/30/2015)... (PRWEB) , ... July 31, 2015 , ... Ralco is ... Center at the Lyon County Fair to be held August 5-9 in Marshall. The ... where their meals come from and how agriculture impacts their daily lives. This unique ...
(Date:7/30/2015)... According to a new market ... PB/PK, PKPD, Trial Design, Toxicity Prediction, In-house, Contract Service), ... by End Users - Global Forecast to 2020", published ... USD 2,107.99 million by 2020 from USD 1,034.93 million ... Browse more than 75 ...
(Date:7/30/2015)... COPENHAGEN, Denmark , July 30, 2015 /PRNewswire/ ... a biotechnology company that applies its innovative TransCon ... announced positive top-line results from a six-month Phase ... of once-weekly TransCon Growth Hormone in 53 treatment-naïve, ... "We are extremely pleased with the ...
(Date:7/29/2015)... -- Sanofi, a global and diversified ... of 2015. CEO Olivier Brandicourt comments ... different businesses. Watch video interview and ... Topics covered in the interview include:  ... drivers - Diabetes - ...
Breaking Biology Technology:Ralco Announces Primary Sponsorship of Ralco Enrichment Center at Lyon County Fair 2Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 2Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 3Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 4Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 5Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 6Ascendis Pharma A/S Announces Positive Top-line Results from a Phase 2 Pediatric Study of Once-Weekly TransCon Growth Hormone for the Treatment of Growth Hormone Deficiency 7
Cached News: