Analysis of the gut contents of the internal exotic fish species opsariichthys uncirostris uncirostris in the futatsugawa river, Kyushu Island, Japan

Yoshihisa Kurita, Jun Nakajima, Jun Kaneto, Norio Onikura

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Opsariichthys uncirostris uncirostris was introduced from Lake Biwa to several freshwater areas in Kyusyu Island, and the gut contents of this fish were observed in order to evaluate the effect of internal invasion on native aquatic organisms. The fish specimens were captured in the Futatsugawa river, northwestern Kyushu Island, Japan, between February 2007 and January 2008, and their gut contents were examined under a stereomicroscope. The gut contents of this exotic species comprised various prey animals, mainly fishes in most of the seasons. The empty gut ratio was approximately 80% in several seasons and 100% during February and March. This exotic species showed high selectivity for Zacco spp., Pseudorasbora parva, Tanakia spp., and Rhodeus spp., which had large populations at the study sites. In contrast, this exotic species showed no selectivity for Carassius spp. that also had a large population. Acheilognathus spp. that had a small population at this study site showed high selectivity as prey by this exotic species. A. tabira nakamurae, a native species, is listed as threatened in the Japanese Red Data Book. Native species with a small population and high prey selectivity were estimated to be the most negatively effected species by the internal invasion of the study site by this exotic species.

Original languageEnglish
Pages (from-to)429-433
Number of pages5
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume53
Issue number2
Publication statusPublished - Oct 1 2008
Externally publishedYes

Fingerprint

Islands
Rivers
Japan
Fishes
digestive system
rivers
fish
Population
Zacco
indigenous species
Aquatic Organisms
Carassius
Pseudorasbora parva
Lakes
Fresh Water
aquatic organisms
Opsariichthys uncirostris
lakes
animals

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

Cite this

@article{ad50a080fe9f446fa01fa1a53dbbb348,
title = "Analysis of the gut contents of the internal exotic fish species opsariichthys uncirostris uncirostris in the futatsugawa river, Kyushu Island, Japan",
abstract = "Opsariichthys uncirostris uncirostris was introduced from Lake Biwa to several freshwater areas in Kyusyu Island, and the gut contents of this fish were observed in order to evaluate the effect of internal invasion on native aquatic organisms. The fish specimens were captured in the Futatsugawa river, northwestern Kyushu Island, Japan, between February 2007 and January 2008, and their gut contents were examined under a stereomicroscope. The gut contents of this exotic species comprised various prey animals, mainly fishes in most of the seasons. The empty gut ratio was approximately 80{\%} in several seasons and 100{\%} during February and March. This exotic species showed high selectivity for Zacco spp., Pseudorasbora parva, Tanakia spp., and Rhodeus spp., which had large populations at the study sites. In contrast, this exotic species showed no selectivity for Carassius spp. that also had a large population. Acheilognathus spp. that had a small population at this study site showed high selectivity as prey by this exotic species. A. tabira nakamurae, a native species, is listed as threatened in the Japanese Red Data Book. Native species with a small population and high prey selectivity were estimated to be the most negatively effected species by the internal invasion of the study site by this exotic species.",
author = "Yoshihisa Kurita and Jun Nakajima and Jun Kaneto and Norio Onikura",
year = "2008",
month = "10",
day = "1",
language = "English",
volume = "53",
pages = "429--433",
journal = "Journal of the Faculty of Agriculture, Kyushu University",
issn = "0023-6152",
publisher = "Faculty of Agriculture, Kyushu University",
number = "2",

}

TY - JOUR

T1 - Analysis of the gut contents of the internal exotic fish species opsariichthys uncirostris uncirostris in the futatsugawa river, Kyushu Island, Japan

AU - Kurita, Yoshihisa

AU - Nakajima, Jun

AU - Kaneto, Jun

AU - Onikura, Norio

PY - 2008/10/1

Y1 - 2008/10/1

N2 - Opsariichthys uncirostris uncirostris was introduced from Lake Biwa to several freshwater areas in Kyusyu Island, and the gut contents of this fish were observed in order to evaluate the effect of internal invasion on native aquatic organisms. The fish specimens were captured in the Futatsugawa river, northwestern Kyushu Island, Japan, between February 2007 and January 2008, and their gut contents were examined under a stereomicroscope. The gut contents of this exotic species comprised various prey animals, mainly fishes in most of the seasons. The empty gut ratio was approximately 80% in several seasons and 100% during February and March. This exotic species showed high selectivity for Zacco spp., Pseudorasbora parva, Tanakia spp., and Rhodeus spp., which had large populations at the study sites. In contrast, this exotic species showed no selectivity for Carassius spp. that also had a large population. Acheilognathus spp. that had a small population at this study site showed high selectivity as prey by this exotic species. A. tabira nakamurae, a native species, is listed as threatened in the Japanese Red Data Book. Native species with a small population and high prey selectivity were estimated to be the most negatively effected species by the internal invasion of the study site by this exotic species.

AB - Opsariichthys uncirostris uncirostris was introduced from Lake Biwa to several freshwater areas in Kyusyu Island, and the gut contents of this fish were observed in order to evaluate the effect of internal invasion on native aquatic organisms. The fish specimens were captured in the Futatsugawa river, northwestern Kyushu Island, Japan, between February 2007 and January 2008, and their gut contents were examined under a stereomicroscope. The gut contents of this exotic species comprised various prey animals, mainly fishes in most of the seasons. The empty gut ratio was approximately 80% in several seasons and 100% during February and March. This exotic species showed high selectivity for Zacco spp., Pseudorasbora parva, Tanakia spp., and Rhodeus spp., which had large populations at the study sites. In contrast, this exotic species showed no selectivity for Carassius spp. that also had a large population. Acheilognathus spp. that had a small population at this study site showed high selectivity as prey by this exotic species. A. tabira nakamurae, a native species, is listed as threatened in the Japanese Red Data Book. Native species with a small population and high prey selectivity were estimated to be the most negatively effected species by the internal invasion of the study site by this exotic species.

UR - http://www.scopus.com/inward/record.url?scp=57349084889&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=57349084889&partnerID=8YFLogxK

M3 - Article

VL - 53

SP - 429

EP - 433

JO - Journal of the Faculty of Agriculture, Kyushu University

JF - Journal of the Faculty of Agriculture, Kyushu University

SN - 0023-6152

IS - 2

ER -