Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




WATER WORLD
Boat noise stops fish finding home
by Staff Writers
Bristol, UK (SPX) Jul 02, 2013


Fish normally use the acoustic cues from fish and invertebrate reef residents to find suitable habitat.

Boat noise disrupts orientation behaviour in larval coral reef fish, according to new research from the Universities of Bristol, Exeter and Liege. Reef fish are normally attracted by reef sound but the study, conducted in French Polynesia, found that fish are more likely to swim away from recordings of reefs when boat noise is added.

Sophie Holles, a PhD researcher at the University of Bristol and one of the study's authors, said: "Natural underwater sound is used by many animals to find suitable habitat, and traffic noise is one of the most widespread pollutants. If settlement is disrupted by boat traffic, the resilience of habitats like reefs could be affected."

Sound travels better underwater than in air and reefs are naturally noisy places: fish and invertebrates produce feeding and territorial sounds while wind, waves and currents create other background noise. Boats can be found around all coastal environments where people live and the noise they make spreads far and wide.

Co-author, Dr Steve Simpson, a marine biologist at the University of Exeter, said: "Boat noise may scare fish, affecting their ecology. Since one in five people in the world rely on fish as their major source of protein, regulating traffic noise in important fisheries areas could help marine communities and the people that depend on them."

The study used controlled field experiments with settlement stage coral reef fish larvae. Larvae in a long plastic tube could decide to swim towards or away from a speaker playing back different sounds.

In ambient noise equal numbers of fish were found in each section of the tube and in reef noise most fish swam towards the sound. But when boat noise was played along with reef noise more fish swam away from the sound than in reef noise alone.

Co-author, Dr Andy Radford from the University of Bristol, said: "This is the first indication that noise pollution can affect orientation behaviour during the critical settlement stage. Growing evidence for the impact of noise on fish suggests that consideration should be given to the regulation of human activities in protected areas."

The research is published in Marine Ecology Progress Series. 'Boat noise disrupts orientation behaviour in a coral reef fish' by Sophie Holles, Stephen D. Simpson, Andrew N. Radford, Laetitia Berten and David Lecchini in Marine Ecology Progress Series http://www.int-res.com/journals/meps/meps-home/

.


Related Links
Universities of Bristol
Water News - Science, Technology and Politics






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





WATER WORLD
Major changes needed for coral reef survival
Washington DC (SPX) Jul 02, 2013
To prevent coral reefs around the world from dying off, deep cuts in carbon dioxide emissions are required, says a new study from Carnegie's Katharine Ricke and Ken Caldeira. They find that all existing coral reefs will be engulfed in inhospitable ocean chemistry conditions by the end of the century if civilization continues along its current emissions trajectory. Their work will be published Ju ... read more


WATER WORLD
Metamorphosis of Moon's Water Ice Explained

Scientists use gravity, topographic data to find unmapped moon craters

Australian team maps Moon's hidden craters

LADEE Arrives at Wallops for Moon Mission

WATER WORLD
Dry run for the 2020 Mars Mission

Opportunity Clocks Up 37 Kilometers Of Roving Mars

Mars Rover Opportunity Trekking Toward More Layers

Mars had oxygen-rich atmosphere 4,000 million years ago

WATER WORLD
Voyager 1 Explores Final Frontier Of Our Solar Bubble

NASA's Voyager 1 approaches outer limit of solar system

PayPal launches quest for intergalactic currency

NASA Bill Would 'End Reliance on Russia,' Nix Asteroid Capture Project

WATER WORLD
China plans to launch Tiangong-2 space lab around 2015

Twilight for Tiangong

China calls for international cooperation in manned space program

Shenzhou 10 Returns Safely To Earth

WATER WORLD
Russian cosmonauts conduct space station tasks in spacewalk

Accelerating ISS Science With Upgraded Payload Operations Integration Center

Strange Flames on the ISS

Europe's space truck docks with ISS

WATER WORLD
Russian Proton M Rocket Explodes Just After Blast Off

Arianespace takes delivery of its next Ariane 5 at the Spaceport

SpaceX Will Launch Turkmenistan Satellite For Thales Alenia Space

New Mexico Space Grant Consortium student experiments blast into space from Spaceport America

WATER WORLD
Astronomers Detect Three 'Super-Earths' in Nearby Star's Habitable Zone

Three planets in habitable zone of nearby star

1 star, 3 habitable planets

Gas-giant exoplanets seen clinging close to their parent stars

WATER WORLD
Low-power Wi-Fi signal tracks movement -- even behind walls

Gartner trims global IT spending forecast for the year

China sets rare earth export quota for second half

EU approves compromise on 'shipbreaking' in South Asian countries




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement