Featured Research

from universities, journals, and other organizations

Reducing Fisheries' By-Catch Through Mathematical Analysis

Date:
February 20, 2008
Source:
Natural Sciences and Engineering Research Council
Summary:
Images of dolphins and turtles ensnared in tuna nets are a heart-wrenching reminder of the impact of fisheries on ocean bio-diversity. Known in fisheries science as 'by-catch,' this killing of non-target species is a complex problem that has resisted easy answers. One possible solution to fisheries bycatch involves digital maps and mathematical analysis to visualize and better understand the location of the most vulnerable marine habitats.

Images of dolphins and turtles ensnared in tuna nets are a heart-wrenching reminder of the impact of fisheries on ocean bio-diversity. Known in fisheries science as 'by-catch,' this killing of non-target species is a complex problem that has resisted easy answers.

One possible solution, advanced by NSERC grantee Dr. Suzana Dragicevic of Simon Fraser University (SFU) in British Columbia involves digital maps and mathematical analysis to visualize and better understand the location of the most vulnerable marine habitats. These so-called 'geospatial' approaches have already been used widely in managing land-based resources to help build consensus among stakeholders with conflicting interests.

"Many environmental problems, including by-catch, are spatial in nature, explains Dragicevic, associate professor and director of the Spatial Analysis and Modeling Laboratory in SFU's Geography Department. "To resolve them you need to build an accurate and objective view of the environment in question."

What makes the challenge daunting is the conflict between commercial fisheries driven by profit maximization and an increasingly determined conservation community intent on protecting as much as 30 per cent of the world's marine habitats. "We must certainly be mindful of the need to protect marine biodiversity, but we can't forget those who are dependent on the fishery for their livelihoods," says Dragicevic, who is also funded by the Social Sciences and Humanities Research Council of Canada.

To find common ground, Dragicevic employs a mathematical optimization process known as multi-criteria evaluation. This tool factors in the competing preferences of stakeholders to help authorities arrive at management decisions acceptable to all parties.

"Multi-criteria analysis has long been successful in resolving conflicts over terrestrial resource management such as land-use suitability analysis and urban development. Recently, we have shown how the approach can be applied to marine environments."

Dragicevic, in collaboration with Louisa Wood, a doctoral researcher at the University of British Columbia's Fisheries Centre, tested their approach under a pilot project in the Pacific Canadian Exclusive Economic Zone (EEZ). The results, published in the Biodiversity and Conservation Journal, confirmed that the methodology can help decision-makers wrestle with the complex trade-offs between fishing and biodiversity conservation.

These methods were presented February 15 during a seminar at the 2008 meeting of the American Association for the Advancement of Science in Boston.


Story Source:

The above story is based on materials provided by Natural Sciences and Engineering Research Council. Note: Materials may be edited for content and length.


Cite This Page:

Natural Sciences and Engineering Research Council. "Reducing Fisheries' By-Catch Through Mathematical Analysis." ScienceDaily. ScienceDaily, 20 February 2008. <www.sciencedaily.com/releases/2008/02/080215082751.htm>.
Natural Sciences and Engineering Research Council. (2008, February 20). Reducing Fisheries' By-Catch Through Mathematical Analysis. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2008/02/080215082751.htm
Natural Sciences and Engineering Research Council. "Reducing Fisheries' By-Catch Through Mathematical Analysis." ScienceDaily. www.sciencedaily.com/releases/2008/02/080215082751.htm (accessed July 30, 2014).

Share This




More Plants & Animals News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Concern Grows Over Worsening Ebola Crisis

Concern Grows Over Worsening Ebola Crisis

AFP (July 30, 2014) Pan-African airline ASKY has suspended all flights to and from the capitals of Liberia and Sierra Leone amid the worsening Ebola health crisis, which has so far caused 672 deaths in Guinea, Liberia and Sierra Leone. Duration: 00:43 Video provided by AFP
Powered by NewsLook.com
At Least 20 Chikungunya Cases in New Jersey

At Least 20 Chikungunya Cases in New Jersey

AP (July 30, 2014) At least 20 New Jersey residents have tested positive for chikungunya, a mosquito-borne virus that has spread through the Caribbean. (July 30) Video provided by AP
Powered by NewsLook.com
Xtreme Eating: Your Daily Caloric Intake All On One Plate

Xtreme Eating: Your Daily Caloric Intake All On One Plate

Newsy (July 30, 2014) The Center for Science in the Public Interest released its 2014 list of single meals with whopping calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins