HOME >> BIOLOGY >> NEWS
Parasitic cowbirds thrive with a less ruthless strategy than cuckoos

Berkeley - America's brown-headed cowbird and the European cuckoo are the classic parasitic birds, laying their eggs in the nests of other bird species and leaving the chick-rearing to another parent.

But while a cuckoo hatchling thrives by muscling its host's eggs out of the nest and hogging all the food, a new study by biologists from the University of California, Berkeley, and the University of Cambridge in England shows that cowbird chicks survive with a less ruthless strategy.

A cowbird chick instead joins its nestmates in a chirping chorus that brings in more food than one noisy cowbird chick could demand from its host parents. By eating more than its share, the researchers found, the cowbird chick actually grows faster when sharing the nest and food with two host chicks than it does when all alone in the nest.

"The cowbird alone is incapable of bringing in enough parental resources - basically food - to be able to grow optimally," said Mark E. Hauber, a Miller Research Fellow in UC Berkeley's Museum of Vertebrate Zoology. "When it has nestmates, the whole nest brings in more parental care, because there is more begging altogether, and so the parents attend the nest more. But the cowbird monopolizes the feeding attempts by the parents. In these experiments, instead of getting 33 percent of the feedings that a brood of two host chicks and one cowbird chick gets, the cowbird actually got over 50 percent of the feeding. So, it grew better than when it was living alone."

Hauber, along with University of Cambridge biologists Rebecca M. Kilner and Joah R. Madden, published the findings in the August 6 issue of Science. Hauber will take a faculty position at the University of Auckland in New Zealand at the end of this year.

Though reviled by bird lovers, cowbirds have proved spectacularly successful, having expanded their range from the Midwest to the entire United States over the past 400 years. This is partly due to their p
'"/>

Contact: Robert Sanders
rls@pa.urel.berkeley.edu
510-643-6998
University of California - Berkeley
5-Aug-2004


Page: 1 2 3 4

Related biology news :

1. Parasitic worms read the bodys immune condition and reproduce accordingly
2. HHMI To Award $14 Million In New International Program To Support Research On Infectious And Parasitic Diseases
3. Two Parasitic Wasps Show Promise For Controlling Pest Flies
4. Antarctic penguins thrive in ocean oases
5. Scientists decode genes of microbe that thrives in toxic metals
6. Bacteria may thrive in Antarctic lake
7. Meet the chemical that lets sea creatures thrive
8. Microbes in basalt thrive on mixed diet of toxic waste
9. Butterflies thrive in restored roadside prairies
10. A novel, safer strategy for regulating gene expression
11. New anti-inflammatory strategy for cancer therapy identified by UCSD researchers

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


(Date:11/13/2018)... (PRWEB) , ... November 13, 2018 , ... ... Officer Jonathan Retano will be a featured presenter at the upcoming CBI Gross-to-Net ... host a hospitality suite on Friday, November 16, where conference attendees will have ...
(Date:11/13/2018)... (PRWEB) , ... November 12, ... ... Triangle Park-based management consulting firm specializing in the life sciences, healthcare, and ... lead for Cybersecurity and Compliance. Summerville will be responsible for overseeing CREO’s ...
(Date:11/13/2018)... ... , ... Kenall has enhanced the popular MedMaster MAEC Series LED luminaires with ... luminaires are equipped with symmetric ambient and asymmetric exam modes, and an IP65 rating ... be specified in pairs, the MAEC is 8” x 48” and has a delivered ...
Breaking Biology News(10 mins):
(Date:11/13/2018)... ... November 13, 2018 , ... ... Research Water Life Science® in Grants Pass, Oregon believes in the power of ... Aqua® Research Water Life Science® sponsors the Power of Water® on talk radio ...
(Date:11/9/2018)... JACKSONVILLE, Fla. (PRWEB) , ... November 08, 2018 ... ... companies in the United States, adopted a machine-learning powered approach to increasing recovery ... was centered around an Artificially Intelligent Collections (AIC) product developed by NLP Logix, ...
(Date:11/7/2018)... ... , ... Diversified Technologies, Inc. (DTI) has installed a PEF (Pulsed ... Technology and Innovation at ASU. Funded by a USDA NIFA SBIR, the purpose of ... and predator control applications. , Algae ponds get up to 50% consumed by predators ...
(Date:11/5/2018)... NASHVILLE, Tenn. (PRWEB) , ... November 05, 2018 ... ... Accredited radiology and telemedicine company backed by Siemens Healthineers and several healthcare VC ... blockchain based radiology solution and making a history by purchasing tokens and obtaining ...
Breaking Biology Technology:
Cached News: