38kHz Simrad ES60 acoustic data collected by FV Rehua during its 2008 transit from New Zealand to Australia prior to commencing commercial fishing of spawning Blue Grenadier on the west coast of Tasmania. FV Rehua is one of the Sealord factory/freezer vessels from New Zealand which fishes Blue Grenadier along the Tasmanian West Coast. Acoustic data is held by the CSIRO Marine Science Acoustic Group (Hobart). Additional data: gps embedded in ES60 .raw files, Wildlife computers MK9 temperature/depth loggers attached to headline of trawl net. During this transit Mark Lewis from CSIRO was onboard and carried out a series of midwater trawls with the MIDOC net over the course of the transit. Related data set for MIDOC sampling: Marlin ID 8355

38kHz Simrad ES60 acoustic data collected by FV Rehua during its 2008 transit from Australia to New Zealand after finishing its commercial fishing of spawning Blue Grenadier on the west coast of Tasmania. FV Rehua is one of the Sealord factory/freezer vessels from New Zealand which fishes Blue Grenadier along the Tasmanian West Coast. Acoustic data is held by the CSIRO Marine Science Acoustic Group (Hobart).

Biological data collected by FV Rehua during the transit from NZ to Devonport. Samples were collected with MIDOC net fitted to commercial trawl nets. In June 2009 scientific sampling of the Tasman Sea micronekton was carried out from a 65 metre factory freezer vessel, the FV Rehua, The voyage took place from Nelson New Zealand on the 17th 2009 June arriving in Devonport (Tasmania), Australia on the 22th June 2009. During the five day transit the vessel was under charter from Petuna Sealord to CSIRO Marine and Atmospheric Research for a total of 24 hrs. The charter time was approximately divided into eight three-hour deep-water deployments that formed three sets of day/night experiments. Three main sampling instruments were used: (1) Sampling of micronekton (primarily biota < 20 cm) was made from 1000 m depth to the surface in 5 sets of equally spaced (200 metre) strata using a fine-mesh multiple opening closing net system (MIDOC). This system was fitted to either the vessel's midwater or demersal commercial net. (2) The digitised return signal from the vessel's 38 kHz Simrad ES60 echosounder was logged for the duration of the voyage. This will allow us to map the along-transect acoustic reflectivity at 38 kHz of the Tasman Sea basin from the surface down to 1500 metres. (3) An Acoustic-Optically System (AOS) was attached to the headline of the demersal net to measure the acoustic reflectivity of individual biota at two frequencies (38 and 120 kHz) and record concurrent optical images using digital SLR still cameras and PAL video system. The AOS was deployed vertically down to 1000 metres depths on two occasions. On four occasions it was attached to the headline of the demersal net that had been fitted with the MIDOC cod-end.