Navigation Links
Cephalopods experience massive acoustic trauma from noise pollution in the oceans
Date:4/11/2011

Noise pollution in the oceans has been shown to cause physical and behavioral changes in marine life, especially in dolphins and whales, which rely on sound for daily activities. However, low frequency sound produced by large scale, offshore activities is also suspected to have the capacity to cause harm to other marine life as well. Giant squid, for example, were found along the shores of Asturias, Spain in 2001 and 2003 following the use of airguns by offshore vessels and examinations eliminated all known causes of lesions in these species, suggesting that the squid deaths could be related to excessive sound exposure.

Michel Andr, Technical University of Catalonia in Barcelona, and colleagues examined the effects of low frequency sound exposuresimilar to what the giant squid would have experienced in Asturiasin four cephalopod species. As reported in an article published in Frontiers in Ecology and the Environment (e-View), a journal of the Ecological Society of America, all of the exposed squid, octopus and cuttlefish exhibited massive acoustic trauma in the form of severe lesions in their auditory structures.

The researchers exposed 87 individual cephalopodsspecifically, Loligo vulgaris, Sepia officinalis, Octopus vulgaris and Illex coindetito short sweeps of relatively low intensity, low frequency sound between 50 and 400 Hertz (Hz) and examined their statocysts. Statocysts are fluid-filled, balloon-like structures that help these invertebrates maintain balance and positionsimilar to the vestibular system of mammals. The scientists' results confirmed that statocysts indeed play a role in perceiving low frequency sound in cephalopods.

Andr and colleagues also found that, immediately following exposure to low frequency sound, the cephalopods showed hair cell damage within the statocysts. Over time, nerve fibers became swollen and, eventually, large holes appearedthese lesions became gradually more pronounced in individuals that were examined several hours after exposure. In other words, damage to the cephalopods' auditory systems emerged immediately following exposure to short, low intensity sweeps of low frequency sound. All of the individuals exposed to the sound showed evidence of acoustic trauma, compared with unexposed individuals that did not show any damage.

"If the relatively low intensity, short exposure used in our study can cause such severe acoustic trauma, then the impact of continuous, high intensity noise pollution in the oceans could be considerable," said Andr. "For example, we can predict that, since the statocyst is responsible for balance and spatial orientation, noise-induced damage to this structure would likely affect the cephalopod's ability to hunt, evade predators and even reproduce; in other words, this would not be compatible with life."

The effect of noise pollution on marine life varies according to the proximity of the animal to the activity and the intensity and frequency of the sound. However, with the increase in offshore drilling, cargo ship transportation, excavation and other large-scale, offshore activities, it is becoming more likely that these activities will overlap with migratory routes and areas frequented by marine life.

"We know that noise pollution in the oceans has a significant impact on dolphins and whales because of the vital use of acoustic information of these species," said Andr, "but this is the first study indicating a severe impact on invertebrates, an extended group of marine species that are not known to rely on sound for living. It left us with several questions: Is noise pollution capable of impacting the entire web of ocean life? What other effects is noise having on marine life, beyond damage to auditory reception systems? And just how widespread and invasive is sound pollution in the marine environment?"


'/>"/>

Contact: Nadine Lymn
nadine@esa.org
202-833-8773
Ecological Society of America
Source:Eurekalert

Related biology news :

1. Lead-flapping objects experience less wind resistance than their trailing counterparts
2. Uncultured bacteria found in amniotic fluids of women who experience preterm births
3. Cantabrian cornice has experienced seven cooling and warming phases over past 41,000 years
4. Early-life experience linked to chronic diseases later in life: UBC research
5. Cancer mortality rates experience steady decline
6. Pesky fruit flies learn from experienced females: Study
7. Study explores how life experiences contribute to the biological changes of Alzheimers
8. Improved Endo Capsule Software enhances diagnostic experience
9. Barn personnel experience higher-than-average rates of respiratory symptoms
10. BIO-key® International to Exhibit at Allscripts 2010 Client Experience Conference
11. CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... LONDON , April 26, 2016 ... EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... a partnership to integrate the Onegini mobile security ... (Logo: http://photos.prnewswire.com/prnh/20151104/283829LOGO ) The ... enhanced security to access and transact across channels. ...
(Date:4/15/2016)... -- A new partnership announced today will help life ... a fraction of the time it takes today, ... insurance policies to consumers without requiring inconvenient and ... rapid testing (A1C, Cotinine and HIV) and higi,s ... pulse, BMI, and activity data) available at local ...
(Date:4/13/2016)... April 13, 2016  IMPOWER physicians supporting Medicaid patients ... a new clinical standard in telehealth thanks to a ... the higi platform, IMPOWER patients can routinely track key ... body mass index, and, when they opt in, share ... visit to a local retail location at no cost. ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016   Boston Biomedical , ... compounds designed to target cancer stemness pathways, announced ... granted Orphan Drug Designation from the U.S. Food ... gastric cancer, including gastroesophageal junction (GEJ) cancer. Napabucasin ... to inhibit cancer stemness pathways by targeting STAT3, ...
(Date:6/23/2016)... HOUSTON , June 23, 2016 ... agreement with the Cy-Fair Sports Association to serve ... of the agreement, Houston Methodist Willowbrook will provide ... education and connectivity with association coaches, volunteers, athletes ... partner with the Cy-Fair Sports Association and to ...
(Date:6/23/2016)... -- The Biodesign Challenge (BDC), a university competition that asks ... systems and biotechnology, announced its winning teams at the ... York City . The teams, chosen ... MoMA,s Celeste Bartos Theater during the daylong summit. Keynote ... of architecture and design, and Suzanne Lee , ...
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the sample tracking ... Arkansas State Crime Laboratory, has joined STACS DNA as a Field Application Specialist. ... Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding our capacity as ...
Breaking Biology Technology: