Future of Fish and People: Bio-Diversity of Fish, and Sustainable Use of
Marine Resources in the Island Regions of Kagoshima
|
Date: 28th November 2015 13:30 – 17:00
Place: Room 211, Kyotsu Kyoiku Building, Kagoshima University |
●Aim
In Kagoshima Prefecture, the distance from north to south is 600 km,
and a variety of fish are found, especially in the islands region. Recent
researches have clarified that each island region has a unique fish fauna
and ecology of rare species. On the other hand, fish is an important food
resource, and plays a role in the key industries. In recent years, tuna
farming has been deployed in various parts of the island area, and the
marine product industry and the community are rapidly changing. Conservation
is necessary for endangered species, but for the promotion of autonomous
development of the island region, sustainable use and understanding of
marine resources is strongly demanded. In this symposium, researchers in
bio-diversity, ecology, resources and fisheries promotion in the island
region of Kagoshima Prefecture gather for the re-evaluation of bio-diversity,
aware of use of marine products with the aim of autonomous development
of the island region. In this symposium, we propose "Watch over the
ecosystem of the rich sea. Live together with the marine product industry
and the community of the island region in harmony with the environment.”
●Program
13:30 Opening
13:35 「Species diversity and distributional characteristics of fishes from
the islands of Kagoshima」
● MOTOMURA Hiroyuki (The Kagoshima University Museum)
- The islands of Kagoshima are scattered across a range of 600 km extending
roughly from the 32nd to the 27th parallel north. The main islands in Kagoshima,
from north to south, are the Koshiki, Uji, Kusagaki, Osumi, Tokara, and
Amami Islands, and are composed of about 600 islands. A group of islands
from the Osumi to Amami Islands is, together, called the Satsunan Islands.
Comprehensive ichthyofaunal surveys of the islands of Kagoshima have
not been previously conducted. The distributions of various fish species
have been commonly described in books and papers as roughly “the Ryukyu
Islands” or “the Satsunan Islands”. However, recent large-scale surveys
in the region by the author and his colleagues have revealed that each
island has a unique ichthyofauna, and many species are not widely distributed
over several islands. In this presentation, the biogeography of fishes
in the Satsunan Islands and the unique ichthyofauna in Yaku-shima are detailed,
with a report on the latest surveys carried out in the Koshiki and Uji
Islands.
14:15 「Endangered fish species and trials for their conservation」
●KUME Gen (Faculty of Fisheries, Kagoshima University)
- In Kagoshima Prefecture, more than ten fish species are now registered
as critically endangered species by the Ministry of Environment. Ryukyu-ayu,
Plecoglossus altivelis ryukyuensis, is one of them, the wild population
of which is found only in Amami-oshima Island, Kagoshima Prefecture. Ryukyu-ayu
is a subspecies of Ayu, Plecoglossus altivelis altivelis, which is one
of the most commercially important species in Japanese inland fishery and
widely distributed from the mainland of Japan to Yakushima Island of Kagoshima
Prefecture. They are amphidromous species as well as P. altivelis altivelis,
their larvae and juveniles using estuarine and coastal regions as their
nursery areas for several months from winter to early-spring.
We have performed extensive collaborative ecological studies with Ryukyu
University, other universities and institutes to understand deeply how
fish live in the natural environments. In the presentation, I introduce
the latest findings on ecological traits of Ryukyu-ayu and outreach activities
for local people and pupils of elementary schools to conserve the species
them in Amami-oshima Island.
14:55 Break
15:05 「Overview of fisheries and oceanic environment around Kagoshima islands,
and efforts on resource conservation by fishermen」
●SHISHIDOU Hirotoshi
(Kagoshima Prefecture Fisheries Technology and Development Center)
- Kagoshima is extensive as spreading about 600 km from temperate to subtropical
zone, where is composed of Satsuma and Ohsumi peninsula and many islands,
e.g. Shishijima, Koshikishima, Tanegashima, Yakusushima, Tokara islands,
and Amami islands. The coastline length of Kagoshima is 2,664km, the third
longest in Japan. The oceanic environment around Kagoshima is complicated
because of complex coastline and bottom shape of the ocean, and influence
of the Kuroshio current, the route of which fluctuates day by day. The
marine fisheries and aquaculture production value in Kagoshima is 76.6
billion yen, fourth in Japan. The islands of Kagoshima and the population
living in there are the most remote in Japan, so marine fisheries and aquaculture
are active as one of the major industries. Even though the fishermen’s
life environment is severe, there are many efforts in resource conservation
by fishermen. Here, I present the characteristics of fisheries and the
oceanic environment in Kagoshima, especially its remote islands, and efforts
in resource conservation by fishermen as a voluntary initiatives in remote
islands, for example banded blue sprat (Japanese name “Kibinago”) in Koshikishima
and deep sea snapper (Japanese names “Hamadai, Aodai, Himedai, Ohhime”)
in southwestern islands.
15:45 「The present conditions and challenges faced in remote islands in
the promotion
and marketing of fisheries」
●TORII Takashi (Faculty of Fisheries, Kagoshima University)
- Kagoshima prefecture has numerous remote islands that are dependent on
fishery industries for survival. This research aims to analyze the present
conditions and challenges faced in these islands in the promotion and marketing
of fisheries.
Fisheries products and shellfish from Kagoshima’s remote islands are
mainly shipped and consumed by people in the mainland, supporting food
security. In recent years fisheries management and production are increasingly
challenged as the results of high transportation costs, fuel price, and
high costs of fishing gear and materials. There is an increase in the price
of shipping and challenges in maintaining freshness that determines the
prices of the catch; as a result the prices during auctions are lower as
the result of the deterioration in freshness. These problems combined with
a decline in fishery resources have resulted in the weakening of island
economies and affect fisheries supply to the mainland.
The discussions of these challenges will focus on three case studies
of Koshiki Island, Nakanoshima island and Yoron Island. The analysis will
focus on capital investment for the purpose of local promotion in Koshiki
Island, the frozen shipment system in Nakanoshima and the promotion of
artificial fishing reef implemented in Yoron Island. Through the analysis
of the three case studies, the challenges faced by remote island fisheries
will be clarified.
16:25 Discussion
17:00 Closing
●Poster
（Poster jepg） |
トップページヘ 
cpi.kagoshima-u.ac.jp
