It is a normal weekday at Wuling Recreation Area, which is under the
jurisdiction of Shei-Pa National Park and lies deep in a mountainous
part of central Taiwan’s Taichung City. Tourists are trickling through
the park’s Taiwan Salmon Eco Center, a building named for and housing a
small number of Formosan landlocked salmon [shown below left], members of an endangered
fish species found nowhere else on Earth. “I didn’t know it was the fish
on the money,” says one visitor, pointing to the image of two salmon on
a replica of Taiwan’s NT$2,000 (US$67) banknote. Other sightseers
comment on the salmon’s diet (mostly aquatic insects), or how healthy
the fish look.

For most people, the center is the only place where they can get
near enough to a school of Formosan landlocked salmon to see the spots
that mottle the top and lower parts of each fish’s body. To protect the
salmon, tourists are not allowed close to Qijiawan Creek [lower right], the nearby
waterway that is the species’ main habitat. The creek, which is 15.3
kilometers long and 7 to 12 meters wide, drains an area of 76 square
kilometers.
“The center provides a chance for the public to see these
beautiful fish up close. When they can see the salmon, they’ll
appreciate and recognize the need to protect them. Then, they’ll give
their support to conservation measures,” says Lin Hsing-juh, a
professor in the Department of Life Sciences at National Chung Hsing
University in Taichung and leader of the Wuling Long-Term Ecological
Research (WLTER) team. He explains that the salmon displayed in the
center were not taken from Qijiawan Creek, but rather bred in captivity.
Official efforts to bolster the Formosan landlocked salmon
population date from the 1980s, when the species was listed first as a
valuable natural asset under the Cultural Heritage Preservation Act,
then as a protected species under the Wildlife Conservation Act.
Scientists, however, have been taking an interest in the fish for almost
a century.
Taiwan was a Japanese colony from 1895 to 1945. In 1917, while
visiting a police station in what is now Yilan County’s Datong Township,
an assistant to Japanese scientist Masamitsu Oshima (1884–1965) was
told that fish similar to Japanese trout existed in high-altitude
streams in Taiwan’s northeast. With the help of Atayal aborigines in the
Yilan area—who called the species bunban or kulubang—the assistant obtained a salted tail of one fish.
When Oshima returned to Taiwan from Stanford University in the
United States early the following year, he was intrigued. He gathered
additional specimens and set to work describing the fish’s
characteristics in words and diagrams. In a June 1919 Japanese-language
article in an agricultural bulletin, Oshima alerted the world to the
existence of what is today commonly called the Formosan landlocked
salmon.
In his initial report that year, Oshima dubbed the species Salmo
saramao, Saramao being the name of an Atayal community near today’s
Lishan Village in Taichung City’s Heping District from which a specimen
was taken. But when David S. Jordan, a former Stanford president who
served as Oshima’s research instructor, wrote the first English-language
report about the discovery, he decided Oncorhynchus masou formosanus
was a more suitable label, reasoning that Formosa (as Westerners then
called Taiwan) was known to the outside world, whereas Saramao was not.
Originally regarded as a subspecies of the cherry salmon (aka
masu salmon, Oncorhynchus masou) found in Japan, the Korean Peninsula
and Russia’s Far East, the Formosan landlocked salmon is now regarded by
most researchers as a species in its own right. Accordingly, its
scientific name has been amended to Oncorhynchus formosanus, under which
the species is listed in the Fish Database of Taiwan maintained by
Academia Sinica, Taiwan’s foremost research institution, as well as in
the International Union for Conservation of Nature Red List of
Threatened Species.
Scientists agree that Taiwan’s salmon shares ancestry with its
Japanese counterpart, and that DNA comparisons suggest the two species
split around 800,000 years ago. In a paper published by the Journal of the National Taiwan Museum
in 2010, Shieh Ying-tzung, a member of the museum’s Department of
Research, theorizes that “the most likely timing of ... salmon straying
and moving onto Taiwan is 0.78 million years ago after a meteorite
strike.” The impact, he says, not only led to significant global cooling
but also caused magnetic north and south to switch places. “This
combination of cooler sea temperatures and the salmon’s potentially
confused magnetic tracking sensitivity would have allowed northern
cherry salmon populations to stray southward as far as Taiwan..."
To read the rest of this article, which appears in the August issue of Taiwan Review, click here.