In Japan, we have developed a hatching and
release business that takes advantage of the salmon's tendency to return to
their mother rivers and obtain them as highly productive fishery resources. We
aim to make this business more robust and sustainable food production system,
and to upgrade it to one that can adapt to ecosystem considerations and climate
change. We will also get students interested in biodiversity by learning about
fish taxonomy of salmon and trout. We hope that students will learn the basics
of these studies in this class, and we hope to nurture human resources who will
contribute to the SDGs (Zero Hunger, Enriching the Oceans) in the future.
The United Nations has designated the
decade beginning in 2021 as the Decade of Marine Science to contribute to the
SDGs. Marine science as defined by the UN includes the field of fisheries.
Salmon and trout are the common names for
fish of the subfamily Salmoninae of the family Salmonidae, of which about 15
species are known from Japan. Taxonomically, there is no clear distinction
between fish called “salmon” and those called “trout”. There are genuine “salmon”
(chum salmon), but no “trout”. In this lecture, I will introduce mainly
Japanese salmon and trout species from a taxonomic point of view and explain
their phylogenetic evolution.