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Vol. 63, 2024
(update: 2024.3.27)
Integrative Taxonomy Reveals
Freshwater Shrimp Diversity (Decapoda: Atyidae: Neocaridina) from Kyushu and
Southern Honshu of Japan, with a Discussion on Introduced Species
Hsi-Te
Shih1,*,§ , Yixiong Cai2,§, Nobuaki Niwa3,†,
Hidenori Yoshigou4, and Yasuhiko Nakahara5
doi:-
1Department
of Life Science and Research Center for Global Change Biology, National
Chung Hsing University, 250, Kuo Kuang Road, Taichung 402, Taiwan.
*Correspondence: E-mail: htshih@dragon.nchu.edu.tw (Shih)
2National Biodiversity Centre, National Parks Board, 1
Cluny Road, Singapore 259569, Republic of Singapore. E-mail:
CAI_YIXIONG@nparks.gov.sg (Cai)
3Faculty of Science, Kyoto University, Kitashirakawa,
Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
4Chugai Technos Co. LTD, 9-12, Yokogawa-shin-machi,
Nishi-ku, Hiroshima City, 733-0013, Japan. E-mail:
h.yoshigo@chugai-tec.co.jp (Yoshigou)
5SEIBU Environmental Research Co., LTD,
Mikawachishin-machi, Sasebo-City, Nagasaki, 859-3153, Japan. (E-mail:
caridina@nifty.com (Nakahara)
†deceased.
§HTS and YC contributed equally to this paper.
(Received 3 April 2023 / Accepted 14 March 2024 / Published -- 2024)
Communicated by Benny K.K. Chan
Correct identification of species
is crucial for invasion ecology and management, particularly in aquatic
systems. In this study, specimens of the freshwater shrimp genus Neocaridina from Kyushu and
southern Honshu of Japan were identified by using an integrative
approach that combined DNA barcoding of mitochondrial cytochrome
oxidase subunit I (COI) and
morphological examination. Among the eight species detected, two are
native, viz. N. denticulata and N. ikiensis. Four are regarded as
non-indigenous, viz. N. davidi,
N. koreana, N. palmata, N. aff. palmata which are believed to have
been introduced from other East Asian countries either by aquarium
trade or as live fish bait. The remaining two are probably cryptic
native species, which have either been mistaken for known species, e.g., N. aff. denticulata, or species that have
not been discovered before, e.g.,
N. aff. fukiensis. While the four alien
species have spread widely in central Honshu, northern Kyushu and
Tsushima Island, their impacts on the native species and the overall
ecology remain mostly unexplored. Problems associated with using DNA
barcoding for species identification are highlighted for further
research.
Key words: Japan, DNA barcoding, Cytochrome
oxidase subunit I (COI),
Morphology, Integrative taxonomy, Neocaridina
denticulata, N. davidi,
N. ikiensis, N. koreana, N. palmata
Citation: Shih HT, Cai Y, Niwa N, Yoshigou
H, Nakahara Y. 2024. Integrative taxonomy reveals freshwater shrimp
diversity (Decapoda: Atyidae: Neocaridina)
from Kyushu and southern Honshu of Japan, with a discussion on
introduced species. Zool Stud 63:18.
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