HOME >> BIOLOGY >> NEWS
Fossils tell the hole story of killer drillers and their prey

ANN ARBOR, Mich.---In the classic textbook example, predators and prey are locked in an escalating evolutionary arms race. As prey develop defenses against their attackers, predators go them one better, devising new ways of penetrating their victims' defenses.

But it doesn't always happen that way, and investigating systems in which prey don't respond to predation by upping the ante can be as informative as studying the more typical sort, said University of Michigan paleontologist Tomasz Baumiller. In a report in the June 17 issue of Science, Baumiller and collaborators at Virginia Tech describe how they used fossil shells of animals called brachiopods to shed light on ancient ecological interactions.

Brachiopods, also known as lampshells, were plentiful in Earth's oceans 550 million years ago to 250 million years ago. Today the shelled creatures, which look something like clams, are still around but less prevalent. One way of assessing rates of predation or parasitism on brachiopods and other fossil shellfish is to look for round holes drilled into their shells by their enemies. The researchers studied more than 40,000 specimens from 18 museums, as well as field-based estimates from the literature.

"We wanted to determine at what frequencies drilling had occurred, whether that had changed through time, and what sorts of lessons we could learn from the patterns that we found," Baumiller said. What they found was that attacks on brachiopods were rare, but widespread and continuously present through the entire Paleozoic Era, suggesting that brachiopods were not locked in an arms race with drilling predators. Instead, predators probably picked on brachiopods only when they mistook them for something else or when there was nothing better to eat, the researchers believe.

"The reason is, they're not terribly nutritious---they have a relatively low amount of meat between their shells," which also may explain why you never see brachiopod c
'"/>


16-Jun-2005


Page: 1 2

Related biology news :

1. Fossils of ancient sea monster found in Montana
2. Fossils pinpoint tropics as Earths most fruitful biodiversity spawning ground
3. Early bird caught the fish: Fossils depict aquatic origins of birds 115 million years ago
4. What we can learn from the biggest extinction in the history of Earth
5. Biologist traces coconuts history through DNA
6. Colorado River streamflow history reveals megadrought before 1490
7. Book explores history, causes of allergy and asthma epidemic
8. Academy paleontologist and Alaska artist in line for natural history awards
9. Ancient coral reef tells the history of Kenyas soil erosion
10. Microfossils unravel climate history of tropical Africa
11. 500,000 years of climate history stored year by year

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Fossils tell the hole story killer drillers and their prey

(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: