HOME >> BIOLOGY >> NEWS
In Western bluebird as well as human families, accumulated wealth encourages stability

king their family relationships. The bluebirds, which live a maximum of eight years but typically only three to four, tend to hold onto their territories throughout their lifetime. A typical territory might contain five birds overwintering together, including parents, sons and immigrant females. Apparently because of delayed dispersal, when the sons leave in the spring, they tend to nest nearby, creating an extended family.

"There are families of a father and mother with three sons nesting nearby, a daughter a kilometer away, and an uncle up the hill, so it's common for family members to live quite close together," she said.

Starting in 2001, Dickinson and undergraduate interns from UC Berkeley began cataloguing the mistletoe resources available in each mating pair's territory, and during the spring of 2003, she and McGowan removed mistletoe from 13 territories - a Herculean task requiring weeks of tree climbing and trimming.

In contrast to the situation on 13 undisturbed territories, she noticed that sons in the depleted territories, rather than sticking around through the winter, left at the same time as their sisters in late summer. And they seemed to leave of their own volition, rather than being kicked out by their parents.

"We looked extensively and did not see much aggression directed at offspring in hundreds of hours of observation during the dispersal stage. Instead, the fledglings were aggressive to each other," she said. "But we admit that parental eviction of offspring could happen very quickly, so even our extensive observation may not have been adequate to detect it."

Dickinson noted that development along California's Central Coast, from Santa Barbara County to Monterey County in particular, is leading to clear-cutting of the oaks that support mistletoe and provide winter food for the Western bluebird. Combined with the declining regeneration of blue and valley oaks and the loss of coast live oaks and tanoaks to
'"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
24-Oct-2005


Page: 1 2 3 4

Related biology news :

1. Study finds Western-style meat-sweet diet increases risk of breast cancer in postmenopausal women
2. Case Western Reserve University School of Medicine researchers awarded $27M for TB research
3. Case Western researcher, international team call for better global warming forecasting
4. WHSRN awarded major grant to foster shorebird conservation throughout the Western Hemisphere
5. Case Western Reserve University biologists suspect lightning fires help preserve oak forests
6. Case Western Reserve University licenses methoxyamine to Tracon
7. Case Western Reserve University chemist takes on HIV-1 virus with $1M support from NIH
8. Case Western Reserve University paleontologist discovers South American mammal fossils
9. Case Western Reserve University researchers find protein associated with brain cell death
10. Case Western Reserve University School of Medicine gets $4 million to make smart nanoparticles
11. ASU students host first annual Western Regional Bioethics Conference

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


(Date:3/27/2021)... ... March 25, 2021 , ... Phlexglobal announced ... Planet Group, has selected Phlexglobal and its innovative regulatory SaaS software, PhlexSubmission, as ... a comprehensive review of five regulatory software companies, with the review team including ...
(Date:3/27/2021)... ... 25, 2021 , ... The 2021 Virtual Conference on Clinical Trial Supply-Europe ... More and more, clinical trial supply conferences are featuring speakers and forums that ... Asymmetrex’s founder and CEO, James L. Sherley, M.D., Ph.D., presented a talk ...
(Date:3/23/2021)... ... March 23, 2021 , ... G-CON Manufacturing (G-CON), the ... by Matica Biotechnology (Matica Bio), a contract development and manufacturing organization (CDMO) specializing ... the cleanroom build out for its new GMP production facility in College Station, ...
Breaking Biology News(10 mins):
(Date:3/27/2021)... ... March 24, 2021 , ... ... Life Sciences and Healthcare firms of all sizes, adds depth to its team ... specialist. Pardillo, who earned his doctorate in computational chemistry from Florida International University ...
(Date:3/27/2021)... ... March 24, 2021 , ... ABI Wellness, ... and reporting approach designed under CEO Mark Watson, today announced a webinar dedicated ... featuring guest speakers Dr. Cameron Clark, Neuropsychologist and Founder of Sharp Thinking, and ...
(Date:3/27/2021)... ... ... The Xtalks editorial team is pleased to announce the launch of the ... joined by editorial team members Ayesha Rashid, Sydney Perelmutter and Mira Nabulsi to discuss ... including insights from industry experts. , The Xtalks Life Science podcast will feature ...
(Date:3/23/2021)... Conn. (PRWEB) , ... March 23, 2021 , ... ... develops solutions for characterizing microbiome populations down to the strain level, recently unveiled ... applications. , Not all microbes are created equal: some are easy to ...
Breaking Biology Technology:
Cached News: