• A Short Paper was Published on Clandestine Stocking of an Endangered Bitterling Acheilognathus typus (June 25, 2022)
Title
Unauthorized stocking of an endangered bitterling Acheilognathus typus to an irrigation pond detected and substantiated by biological and human lines of evidence
Abstract
Acheilognathus typus, an endangered bitterling, was captured in an irrigation pond in the northern part of Niigata Prefecture, Japan in 2019. This bitterling species had once occupied in that region. Its absence for years indicated possible extinction of the bitterling there. We expected that the recently captured individuals are unknown remnant stock of that endangered species found through an extensive survey. Mitochondrial genotyping, however, revealed that the recently captured individuals had a common haplotype with those from Kashimadai, Miyagi Prefecture, Japan. Uniqueness of the haplotype to these two ponds indicates stock identity between them. In the pond in Kashimadai, an illegal activity catching the bitterling by a person from northern Niigata Prefecture was detected in 2015. We conclude that the bitterling from northern Niigata Prefecture was stocked from a pond in Kashimadai. Our report is the first example of unauthorized bitterling stocking substantiated from both biological and human lines of evidence.
Fig. 1. Acheilignathus typus collected from an irrigation pond in northern Niigata Prefecture.
Fig. 2. Map of the northern part of Honshu Island, Japan showing collecting localities for Acheilignathus typus in the present (star) and a previous studies. The solid circle indicates a pond in Kashimadai with haplotypes identical to those from northern Niigata. Other known localities are indicated by open circles. Mountain ranges dividing watersheds are indicated by Λ. Dark gray areas contain present-days known localities, whereas areas in light gray indicate past distribution ranges.
Journal
Fishes 7:150
Doi
10.3390/fishes7040150
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