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:6/5/2020)... ... 04, 2020 , ... Greffex, a pioneering vaccine and gene therapy company based ... understands the need for a global perspective to make an impact in a post ... will serve as an independent, director of the company. , “The Greffex board is ...
(Date:5/28/2020)... (PRWEB) , ... May 28, ... ... (DuPont) has announced a new enzyme solution for adjunct liquefaction: AMYLEX® 6T. ... including the ability to expand into new segments with locally-sourced raw materials, ...
(Date:5/21/2020)... ... May 19, 2020 , ... ... solutions, today introduced BioMed to their award-winning computerized maintenance management system (CMMS), ... people and systems around biomedical engineering to better allocate staff time, automate ...
Breaking Biology News(10 mins):
(Date:6/19/2020)... ... 2020 , ... The Vitaspace project was founded by the famous ... prolong life and find a way (medicine or technology) that will help to preserve ... various scientists from all over the world, doctors, and all people who care. , ...
(Date:6/3/2020)... ... June 03, 2020 , ... ... various applications of biofeedback. In the next installment, Dr. Inna Khazan will discuss ... individuals learn to bring their attention to the feelings, thoughts, and emotions they ...
(Date:5/28/2020)... ... ... The Security Industry Association (SIA) and SecureIDNews have ... Women in Biometrics Awards – a globally recognized program co-founded by SIA and ... SIA Women in Security Forum . The honorees will be recognized during the ...
(Date:5/21/2020)... ... May 20, 2020 , ... Exo ... will serve as the company’s executive vice president of product engineering and report ... disrupting the medical imaging space, bringing more than 24 years of technology leadership ...
Breaking Biology Technology:
Cached News: