Pubblicazione scientifica

Development of an Online Multi-Frequency Profiler for Monitoring Zooplankton

FILONE TECNOLOGICO	TEMA
trasformazione e commercializzazione

RIASSUNTO

The density of zooplankton within bays and in inshore areas is an important environmental parameter for determining the optimal release timing of juvenile salmon (Oncorhynchus keta) from hatchery stations. This is because the juveniles remain in these areas for 1 month, during which time they feed upon zooplankton before they begin their journey to the ocean. We monitored zooplankton, water temperature and salinity from 2013 to 2017 in Yamada Bay, Iwate Prefecture, Japan, using a multi-frequency acoustic profiler collocated with temperature-salinity sensors and a depth sensor. Our observations revealed that the large zooplankton preferred by juvenile salmon are transported into the bay by the Oyashio Current. Therefore, it is important to determine the timing of this transportation. We developed an online profiler to record these events at a hatchery station in Yamada Bay.

DATA

Data di pubblicazione: 01/05/2018

AUTORI

KOUICHI SAWADA
TOMOHIKO MATSUURA
KOHEI HASEGAWA
TOHRU MUKAI
MATT STONE
KEI SASAKI
HIDEKI NIKAIDO

ENTE DI AFFERENZA

JAPAN FISHERIES RSCH & EDUCATION AGENCY FISHERIES TECH DEPT NATL RSCH INST FISHERIES ENG KAMISU JAPAN
FACULTY OF FISHERIES SCIENCES HOKKAIDO UNIV HAKODATE JAPAN
ASL ENVIRONMENTAL SCIENCES SAANICHTON CANADA
JAPAN FISHERIES RSCH & EDUCATION AGENCY RSCH CTR COASTAL FISHERIES & AQUACULTURE TOHOKU NATL FISHERIES RSCH INST MIYAKO JAPAN

RIVISTA

2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO) (Page(s): 1-6)

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