Phenotypic shift of an alien piscivorous chub following translocation from a large lake to small irrigation ditches

Yoshihisa Kurita, Norio Onikura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The piscivorous chub (Opsariichthys uncirostris) is a Japanese predatory cyprinid with a native distribution restricted to a few large lakes. It has now established in a large region of Japan following accidental translocation. Although large water bodies with abundant food resources were long considered essential for establishing this species, the chub has settled in small irrigation ditches in Kyushu. In this study, we explored the phenotypic responses of the chub in these small water bodies by comparing life history traits and morphology with those of chub inhabiting a native lake. Growth rate, fecundity-related traits, and trunk length shifted markedly following translocation to the new habitat. These phenotypic shifts were typical reactions to characteristic conditions of irrigation ditches, such as habitat instability, lotic conditions, and limited food. Adaptability via a rapid phenotypic shift by the chub may have facilitated establishment of populations in small irrigation ditches.

Original languageEnglish
Pages (from-to)731-738
Number of pages8
JournalEcological Research
Volume31
Issue number5
DOIs
Publication statusPublished - 2016 Sep 1

Keywords

  • Alien species
  • Dwarfing
  • Freshwater fish
  • Kyushu Island
  • Life history

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Fingerprint

Dive into the research topics of 'Phenotypic shift of an alien piscivorous chub following translocation from a large lake to small irrigation ditches'. Together they form a unique fingerprint.

Cite this