A Good Start to SOCAL-14

  We’ve were offshore the first few days of SOCAL-14 and pushed back closer to the mainland today with tougher offshore weather. Working around tiny Santa Barbara Island shrouded in fog early on we managed just one short tag deployment on a Risso’s dolphin out of over 100 we encountered. We searched for beaked whales […]

SOCAL-14 BEGINS!

For those of you who have followed the from-the-field blog for the Southern California Behavioral Response Study (SOCAL-BRS) before, welcome back and thanks for the interest and support over the past year regarding our publications and presentations. For others of you not familiar with the project, we hope you will find some interesting information about […]

IMO adopts guidelines to reduce underwater noise from commercial ships.

  The International Maritime Organization (IMO) recently adopted guidelines to reduce underwater noise from commercial ships. The new guidelines: –         recognize that shipping noise can have short-term and long-term impacts on marine life; –         call for measurement of shipping noise according to objective ISO standards, which are themselves on the verge of adoption; –         identify […]

New Paper on “200 kHz” sonar with side lobes audible to marine mammals

    On behalf of my co-authors, I would like to let you know about a new paper on the audibility of high frequency sonar systems to some marine mammals. We investigated the acoustic “leakage” of energy into side lobes from the 200 kHz center frequency of three commercially-available sonar systems. These active sonar systems […]

New Paper on Spotted Seal Hearing

We are very happy to announce the recent publication on hearing and the masking effects of noise in spotted seals. This is the first-ever such measurement of hearing in this species both in air and under water. This study was conducted in highly controlled and quiet acoustic environments and the results indicate very acute hearing […]

New paper on seismic surveys and mitigation of impacts on marine mammals

SEA Blog, A paper was on responsible practices for conducting seismic surveys in environmentally sensitive areas was published recently in Aquatic Mammals. The lead author was Dr. Doug Nowacek from Duke University’s Marine Laboratory, who is a close colleague of SEA’s president Brandon Southall who was also an author on the paper. A copy of […]

Catalina Rissos

It’s been a full few days for SOCAL-BRS, mainly working Rissos dolphins around Catalina Island. We tried to get further offshore yesterday and today but rougher offshore weather pushed us back in. We have had a few firsts the last few days including our first 12+ hour deployment on a Rises and our first experiment […]

Fin whale trifecta

We have been focused on baleen whales the last few days in the SOCAL-13 project, primarily fin whales. Over the past three days we deployed ten tags on fin whales (and one on a blue whale) and ran two CEEs plus a full control sequence with a total of seven tagged animals. All of these […]

START SOCAL-13 PHASE II – Double Rissos

We’re very glad to be back together for this last phase of our SOCAL-BRS project for 2013. We pushed out from Santa Barbara yesterday and came south in pretty good weather. A group of humpback whales has been working in some mixed-species aggregations chasing fish in the Santa Barbara Channel and we came across a […]

Beaked whale bonanza!!!

Sorry for the radio silence with the SOCAL-13 blog. We have had very good offshore conditions and great success accordingly! In fact, the last five days have seen multiple beaked whale tags deployed and multiple groups seen with many other near-miss approaches, which is a first in our efforts out here. We have gotten two […]

SOCAL-BRS

SOCAL-BRS is a study of basic behavior and responses to controlled sound exposures in a variety of marine mammal species.

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