Sea Technology

SEP 2017

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

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www.sea-technology.com September 2017 / st 55 diversity in their new environments. This research suggests that the entry into force of the Ballast Water Conven- tion alone will not prevent the transfer of invasive aquatic species. There has to be mandatory legislation in place to prevent biofouling on ships' hulls, Subsea Industries believes. Successful Freezing, Reanimation Of Zebrafish Embryos Scientists report for the first time the ability to deep freeze and reani- mate zebrafish embryos. The method, appearing in the journal ACS Nano, could potentially be used to bank larg- er aquatic and other vertebrate oocytes and embryos for a life in the future. The researchers injected a cryo- protectant, along with plasmonic gold nanoparticles to serve as a laser ab- sorber, directly into zebrafish embryos. Plunging the embryos in liquid nitro- gen rapidly cooled them to a cryogeni- cally stable state in less than a second, according to modeling results. The re- searchers then used laser irradiation to heat up the nanoparticles, which were uniformly distributed inside the em- bryos, at an ultrafast rate. Not all of the embryos made it, but many were re- vived—a feat that is currently not pos- sible by other techniques. Their hearts, eyes and nervous systems developed through at least the next 28 hours— and they started to wiggle. Cryopreservation could one day help replenish the oceans' biodiversity. Research Expedition to Study Caribbean Marine Life, Pollution Hello Ocean launched its maiden voyage: Expedition Echo. A crew of 10 scientists, artists, filmmakers and a wildlife DJ set sail to explore the offshore waters of Belize. The crew launched new research on the marine mammals of Belize, plastic pollution and sustainable conch fisheries. The goal is to develop media that will persuade the public and policy makers to make decisions that protect the oceans. Hello Ocean, a project of The Ocean Foundation, provides support to early-career scientists and artists. Long-Range Sonar Added To British Polar RV FarSounder's longest-range sonar system FarSounder-1000 will be in- corporated into the British Antarctic Survey's new polar research vessel, the RRS Sir David Attenborough. Cam- mell Laird is currently constructing this ship, owned by Natural Environment Research Council (NERC), at the Cam- mell Laird Birkenhead shipyard. Pinpoint Electronics of Devon, U.K., is the local FarSounder represen- tative for this project. FarSounder sonar will be used for navigation and obstacle avoidance. In addition, it's technology and data can supplement the more traditional on- board science-mission sensors. Pop-Up Satellite Tags To Monitor Hake, Sablefish Researchers at the NOAA North- west Fisheries Science Center will use Desert Star ST-3D pop-up satellite tags to follow the depth and temperature profiles of Pacific hake and sablefish off the Washington coast. Previous studies using the larger ST-MOD tags successfully demon- strated diel vertical migratory behavior of large adult sablefish. The hope is to use the smaller ST-3D tags to gather data on habitat preferences of younger and smaller sablefish and adult Pacific hake. ST

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