HOME >> BIOLOGY >> NEWS
Duke Studies Show That Environmental Effects Of Dams Extend To Insect Life

a small woody plant like that would be all over the place. But it just wasn't there on some islands."

Surveying the insects' food sources as well, Shahabuddin learned that "to find a fruiting tree in the forest is a pretty hard job," she said. "Last summer, I found that there wasn't more than one tree per hectare (about 2.4 acres) that was fruiting, and that was during the peak fruiting season."

To further refine her study, she decided to trace the butterflies' movements and breeding behavior with trapping-and-release experiments. She used rotting banana-baited traps to snare hungry butterflies in netting. Then she marked the trapped insect's wings, released them, and retrapped the marked butterflies later on at other locations.

These experiments showed this butterfly species "just doesn't like those small islands," Shahabuddin said. "I found that very little reproduction was taking place on small islands. The butterflies were not laying eggs there. They were laying lots more eggs on the larger islands, and on islands with a lot of host plants.

Apparently small islands were shunned because they lacked enough resources. "It's a very complicated system," she said. "If there is a high host plant density, butterflies tend to stick around longer. Consequently, they tend to lay more eggs. People assume these islands are pretty much similar in terms of resource distribution. That may be true for some species, like rodents, iguana or howler monkeys. But that's not true for some specialized butterflies."

Shahabuddin noted "many of the same processes we are studying have been found to occur in national parks, which resemble forest islands in the midst of a man-modified landscape. Such studies help to pinpoint the ecological changes taking place in our increasingly fragmented landscapes, and thus help to design conservation strategies."

Rao, another of Terborgh's students about to receive her Ph.D., joined Shah
'"/>

Contact: Monte Basgall
Monte@dukenews.duke.edu
919-681-8057
Duke University Medical Center
5-Aug-1998


Page: 1 2 3 4

Related biology news :

1. Monkey business: Studies show tiny callimicos have unusual characteristics
2. Studies show success of Mectizan partnerships
3. Studies offer new insight into HIV vaccine development
4. Studies suggest brain injury results from developmental exposure to alcohol, anesthesia, and lead
5. Studies show preventive value of food supplements
6. Studies probe rapid evolution of Chinese tallow trees
7. Studies of rare blood syndrome yield novel route to cancer
8. Studies dispute ultraviolet effect on amphibian population declines
9. Studies of spiders silk reveal unusual strength
10. Studies of genes in mice and common worm may accelerate research on blood diseases, cancers
11. Studies offer data on potential impact of Reminyl on caregiver burden in Alzheimers disease

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


(Date:4/13/2017)... UBM,s Advanced Design and Manufacturing event in ... and evolving technology through its 3D Printing and Smart ... the expo portion of the event and feature a ... on trending topics within 3D printing and smart manufacturing. ... will take place June 13-15, 2017 at the Jacob K. ...
(Date:4/11/2017)... , April 11, 2017 NXT-ID, Inc. ... technology company, announces the appointment of independent Directors Mr. ... to its Board of Directors, furthering the company,s corporate governance ... Gino ... we look forward to their guidance and benefiting from their ...
(Date:4/4/2017)... April 4, 2017   EyeLock LLC , a ... the United States Patent and Trademark Office (USPTO) has ... the linking of an iris image with a face ... represents the company,s 45 th issued patent. ... very timely given the multi-modal biometric capabilities that have ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... The CRISPR-Cas9 ... enabling overexpression experiments and avoiding the use of exogenous expression plasmids. The simplicity ... for performing systematic gain-of-function studies. , This complement to loss-of-function studies, such ...
(Date:10/11/2017)... LAGUNA HILLS, Calif. , Oct. 11, 2017  SkylineDx ... London (ICR) and University of Leeds ... to risk-stratify patients with multiple myeloma (MM), in a multi-centric ... The University of Leeds is the ... UK, and ICR will perform the testing services to include ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... conjugate (ADC) therapeutics, today confirmed licensing rights that give it exclusive global ... technology developed in collaboration with Children’s Hospital Los Angeles (CHLA). Additionally, ...
(Date:10/10/2017)... (PRWEB) , ... October 10, 2017 , ... ... innovation and business process optimization firm for the life sciences and healthcare industries, ... conference in San Francisco. , The presentation, “Automating GxP Validation for Agile ...
Breaking Biology Technology:
Cached News: