Sea Technology

MAY 2013

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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marineresources California Sea Grant Recognizes New Scientists Seven research projects have received funding through the California Sea Grant Focus Awards, according to California Sea Grant. The funding will give opportunities to scientists just starting out at California universities. Six of the recipients are new faculty, starting their positions after 2009. The projects focus on a variety of topics, ranging from studies of algae, salt marshes and insect parasites to consumer response to green seafood. Recipients include Christine Cass of Humboldt State University, Kirstin Hardy of California Polytechnic State University, Sindy Tang at Stanford University, Jeremy Long of San Diego State University, Clarissa Anderson at University of California Santa Cruz and Scott Hamilton of Moss Landing Marine Laboratories. The seventh project that was granted funding explores the socioeconomics of coastal communities. All of the projects were peer reviewed to determine merit and pertinence to current marine issues. Acoustic Monitoring Reveals Clues to Cod Behavior For decades, researchers have recorded sounds from whales and other marine mammals using a variety of methods, including passive acoustic monitoring. For the frst time, researchers have used this technology to record spawning cod in the wild. Few studies have observed cod's use of sound as part of reproductive behavior. Although both sexes produce low-frequency grunts, only male Atlantic cod make this sound during spawning season. The research was based on a 2011 pilot study in northern Massachusetts Bay. A single marine autonomous recording unit (MARU) was deployed at a 51-meter depth within a seasonal fshery closure area established to protect a coastal cod spawning aggregation. Male cod grunts were recorded on 98 percent of the recording days. The grunts, which were most often heard during daylight hours, were most common in late May and early June. The MARU was deployed from April through June 2011. The next steps for passive acoustic monitoring are to explore the size and extent of known cod aggregations, and to locate other spawning aggregations in the Gulf of Maine and Georges Bank region. Researchers also need to determine if the grunt data can be used to develop an index of relative cod abundance. Species in more than 100 families of fsh are known to produce sounds. The cod family contains several soundproducing species, including haddock, pollock and Atlantic cod. The study was funded by NOAA's Ocean Acoustics Program. Sea Lion Pups Found Ashore, Crowding California Beaches Southern California shores are becoming crowded as hundreds of sea lion pups are washing up on the beaches, Associated Press reported. Sea lion strandings are signifcantly higher than TECHNOLOGY LTD • Acoustic Transducers • Hydrophones • Piezoelectric Ceramics Specializing in custom designs and new product development, from prototyping to production. www.sensortech.ca Tel: (705) 444-1440 75th EAGE Conference June 10-13, 2013 London, UK Visit us at: Booth 417 www.sea-technology.com MAY 2013 / st 75

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