Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




WATER WORLD
Ship noise makes crabs get crabby
by Staff Writers
Bristol UK (SPX) Mar 01, 2013


If commercially important crabs and lobsters are affected by noise, these findings have implications for fisheries in busy shipping areas where large individuals may be losing out. Conversely, if reducing noise reduces metabolic costs, then quietening aquaculture facilities may lead to higher yields.

A study published in Biology Letters found that ship noise affects crab metabolism, with largest crabs faring worst, and found little evidence that crabs acclimatise to noise over time.

The team from the Universities of Bristol and Exeter found that crabs exposed to recordings of ship noise showed an increase in metabolic rate, indicating elevated stress.

In the real world this could have implications for growth and, if the metabolic cost of noise causes crabs to spend more time foraging to compensate, could also increase the risk of predation.

Researcher Matt Wale from Bristol's School of Biological Sciences describes the study: "We used controlled experiments to consider how shore crabs of different sizes respond to both single and repeated exposure to playback of ship noise. Ship noise is the most common source of noise in the aquatic environment."

Explains Dr Andy Radford, Reader in Behavioural Ecology at Bristol: "We found that the metabolic rate of crabs exposed to ship noise was higher than those experiencing ambient harbour noise, and that larger individuals were affected most strongly. This is the first indication that there might be different responses to noise depending on the size of an individual."

If commercially important crabs and lobsters are affected by noise, these findings have implications for fisheries in busy shipping areas where large individuals may be losing out. Conversely, if reducing noise reduces metabolic costs, then quietening aquaculture facilities may lead to higher yields.

Dr Steve Simpson from the University of Exeter warned: "Since larger crabs are affected more strongly by noise this could have implications for fisheries in noisy areas.

Also, many crustacean species, particularly prawns, are grown in aquaculture, so if acoustic disturbance has a metabolic cost then operational noise in farms may impact on growth, and quieter farms may be more profitable."

.


Related Links
University 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
Mussels cramped by environmental factors
Boston MA (SPX) Feb 28, 2013
The fibrous threads helping mussels stay anchored - in spite of waves that sometimes pound the shore with a force equivalent to a jet liner flying at 600 miles per hour - are more prone to snap when ocean temperatures climb higher than normal. At the American Association for the Advancement of Science meeting in Boston, Emily Carrington, a University of Washington professor of biology, rep ... read more


WATER WORLD
Water On The Moon: It's Been There All Along

Building a lunar base with 3D printing

US, Europe team up for moon fly-by

Russia to Launch Lunar Mission in 2015

WATER WORLD
Computer Swap on Curiosity Rover

Lab Instruments Inside Curiosity Eat Mars Rock Powder

First-ever space tourist plans mission to Mars

Mars rover ingests rock powder for tests

WATER WORLD
Brazil inventor struggles to collect royalties

Stanford scientist closes in on a mystery that impedes space exploration

U.S. research to be free online

NASA Creates Space Technology Mission Directorate

WATER WORLD
Welcome Aboard Shenzhou 10

Reshuffle for Tiangong

China to launch 20 spacecrafts in 2013

Mr Xi in Space

WATER WORLD
ESA's Columbus Biolab Facility

SpaceX set for third mission to space station

Record Number of Students Control ISS Camera

NASA briefly loses contact with space station

WATER WORLD
Dragon Transporting Two ISS Experiments For AMES

SpaceX Optimistic Despite Dragon Capsule Mishap

'Faulty Ukrainian Parts' Blamed for Zenit Launch Failure

The light-lift member of Arianespace's launcher family is readied for its second mission

WATER WORLD
Scientists spot birth of giant planet

NASA's Kepler Mission Discovers Tiny Planet System

Kepler helps astronomers find tiny exo planet

Searching for a Pale Blue SPHERE in the Universe

WATER WORLD
Taiwan turns plastic junk into blankets, dolls

Fukushima raised cancer risk near plant: WHO

Ancient Egyptian pigment points to new security ink technology

Laser mastery narrows down sources of superconductivity




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