HOME >> BIOLOGY >> NEWS
Whale carcass yields bone-devouring worms

cological equivalent of dandelions-a weedy species that grows rapidly, makes lots of eggs, and disperses far and wide." This strategy makes sense considering that these worms can only live on dead whales. After a whale skeleton has been consumed, all the worms at that site will die off. Before this happens, they must release enough eggs or larvae so that some tiny proportion will be transported by the ocean currents until they can find and colonize another whale carcass.

Rouse notes that, "Because of the highly unusual anatomy of the females, at first we were at a loss to know what type of animal Osedax was." But after examining key portions of the worms' DNA, the researchers determined that the whale-fall worms are closely related to the large tube worms found at deep-sea hydrothermal vents and cold seeps. Both types of worms obtain nutrition with the help of symbiotic bacteria.

Further analysis of the DNA data yielded some surprising results. For example, after looking at the amount of variability in the worms' mitochondrial DNA (which is assumed to change at a relatively constant rate over time) they concluded that the two new worm species' most recent common ancestor lived roughly 42 million years ago, about the same time whales themselves first evolved. The worms' genetic diversity also suggests that they are part of an actively breeding population that includes hundreds of thousands of individuals-a population that has presumably been hidden from human eyes in the vastness of the deep ocean. This further implies that, as Vrijenhoek put it, "there must be a lot of dead whales out there."

After studying the dead whale in Monterey Bay for over a year and half, Vrijenhoek and Goffredi have come to the conclusion that the two new worm species are but the tip of the iceberg (or perhaps the tip of the whale's tail). Whale carcasses-or whale falls, as they are called-represent a massive input of food into
'"/>

Contact: Kim Fulton-Bennett
kfb@mbari.org
831-775-1835
Monterey Bay Aquarium Research Institute
29-Jul-2004


Page: 1 2 3 4

Related biology news :

1. Whales, seals or men? Who stole all the fish?
2. Whale populations are too low to resume commercial hunting, geneticists find
3. Whale study links genetics and reproductive success
4. AAAS at the BA: Whale food, winners and losers in Antarctica and solar insights
5. Whales get the bends
6. Whale of a Puget Sound problem lures UW researchers
7. Whales drawn to waters off Mississippi River Delta
8. Could Humpback Whales Be Singing Grammatically?
9. Killer Whales Have Begun Preying On Sea Otters, Causing Disruption Of Coastal Ecosystems In Western Alaska
10. USGS Finds Sea Otters At Risk From Killer Whales In A Changing Ocean
11. Fish Love Songs/Whale Rhythms

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/4/2019)... TORONTO (PRWEB) , ... June 04, 2019 , ... ... automate the search for salient features of seizure risk signals, usually based on ... neurologist-driven EEG interpretation remains the only acceptable diagnostic methodology due to the complexity ...
(Date:6/1/2019)... ... May 31, 2019 , ... ... & Rosati recently invested in BioFactura’s $6M Series B Financing Round. , ... value-added institutional investors who bring significant financial and business resources to bear as ...
(Date:5/31/2019)... ... 2019 , ... Join Julie Peacock, Vice President of Product ... June 19, 2019 at 1pm EDT where she will demonstrate how role-based data ... contract research organizations (CROs) can improve collaboration, auditing, document tracking and reporting. , ...
Breaking Biology News(10 mins):
(Date:5/31/2019)... California (PRWEB) , ... May ... ... of our patent applications from the USPTO providing proprietary interest to our ... METHOD FOR SLEEP DISORDER DIAGNOSIS AND TREATMENT… extends Somnology’s IP rights including ...
(Date:5/31/2019)... ... May 30, 2019 , ... A study released today ... system for the sustained release of human placental stem cell (HPSC)-derived conditioned medium ... to deliver CM into the injured kidney, where it helped restore function and ...
(Date:5/15/2019)... (PRWEB) , ... May 15, 2019 , ... Milton Hershey ... in recognition for his work within the biomedical industry, where he is changing lives ... medical devices. , “William Harding epitomizes the vision of our founders – Milton ...
(Date:5/14/2019)... Calif. (PRWEB) , ... May 14, 2019 , ... ... office expansion, effectively doubling its space from 2,500 to 5,000 square feet. , ... Early Gender DNA tests ,” says Gateway Genomics CEO, Chris Jacob. “The SneakPeek At-Home ...
Breaking Biology Technology:
Cached News: