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A general TS-duration relationships was used to help you imagine seafood proportions

A general TS-duration relationships was used to help you imagine seafood proportions

Acoustic study was indeed collected from the NOAA Boat Nancy Foster within the echosounder working within 3 frequencies (38, 120, 200 kHz). Pulse size is actually set-to 128 ?s with the 120 kHz and you may 200 kHz and you will 256 ?s for the 38 kHz. We interviewed a maximum of seven station at for every single route an enthusiastic acoustic questionnaire try regular 6 times more than a day (pre-dawn, post-dawn, daytime, pre-dusk, post-dusk, nighttime; just as much as step 1.5 era for every single questionnaire). The fresh questionnaire design consisted of eight synchronous transects 1 nm (step 1.852 kilometer) a lot of time and spaced fifty meters aside (Fig 1). Read more