Adaptive downsizing in the piscivorous cyprinid fish, Opsariichthys uncirostris, facilitates rapid establishment after introduction to a small-scale habitat in Japan

Kei’ichiro Iguchi, Yuta Matsumoto, Yoshihisa Kurita, Katsutoshi Watanabe

研究成果: ジャーナルへの寄稿記事

抄録

The three-lips (Opsariichthys uncirostris) is a piscivorous cyprinid fish native to the Biwa Lake, central Japan. A recent unintentional introduction of the species has led to its invasion of a novel, small-scale habitat (the Futatsu River) composed of a few riverine stretches connected by irrigation ditches. Comparative observations of fish samples from both habitats provide evidence of disparities in the fish’s size at maturity between the two habitats, with fish in the Futatsu River reaching maturity at smaller body sizes. Achieving a large body size at maturation requires a larger habitat offering a sufficient supply of food. Principle component analysis of body-surface morphometric characteristics revealed that the two populations show differences in both their body shape and growth rates. In the Futatsu River, the growth rates of upper jaw length, lower jaw length, eye diameter, predorsal length, and tail length were accelerated, while the growth rates of head depth, body depth, and tail depth were decelerated, leading to the acquisition of a distinctly slender body. It is plausible that small-scale habitats with less abundant food supplies favor sexual maturation at smaller body sizes and that slender bodies improve swimming performance, thus making such disproportional downsizing a consequence of adaptation to a novel environment. Whether this change is due to phenotypic plasticity or rapid evolution remains unknown.

元の言語英語
ジャーナルBiological Invasions
DOI
出版物ステータス出版済み - 1 1 2019

Fingerprint

cyprinid
Japan
habitat
fish
body size
habitats
jaws
rivers
maturation
tail
river
irrigation canals
size at maturity
body shape
phenotypic plasticity
lips
anthropometric measurements
food supply
principal component analysis
eyes

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

これを引用

@article{c96c093f9c1e488988e52a6f1eb8b184,
title = "Adaptive downsizing in the piscivorous cyprinid fish, Opsariichthys uncirostris, facilitates rapid establishment after introduction to a small-scale habitat in Japan",
abstract = "The three-lips (Opsariichthys uncirostris) is a piscivorous cyprinid fish native to the Biwa Lake, central Japan. A recent unintentional introduction of the species has led to its invasion of a novel, small-scale habitat (the Futatsu River) composed of a few riverine stretches connected by irrigation ditches. Comparative observations of fish samples from both habitats provide evidence of disparities in the fish’s size at maturity between the two habitats, with fish in the Futatsu River reaching maturity at smaller body sizes. Achieving a large body size at maturation requires a larger habitat offering a sufficient supply of food. Principle component analysis of body-surface morphometric characteristics revealed that the two populations show differences in both their body shape and growth rates. In the Futatsu River, the growth rates of upper jaw length, lower jaw length, eye diameter, predorsal length, and tail length were accelerated, while the growth rates of head depth, body depth, and tail depth were decelerated, leading to the acquisition of a distinctly slender body. It is plausible that small-scale habitats with less abundant food supplies favor sexual maturation at smaller body sizes and that slender bodies improve swimming performance, thus making such disproportional downsizing a consequence of adaptation to a novel environment. Whether this change is due to phenotypic plasticity or rapid evolution remains unknown.",
author = "Kei’ichiro Iguchi and Yuta Matsumoto and Yoshihisa Kurita and Katsutoshi Watanabe",
year = "2019",
month = "1",
day = "1",
doi = "10.1007/s10530-019-01957-3",
language = "English",
journal = "Biological Invasions",
issn = "1387-3547",
publisher = "Springer Netherlands",

}

TY - JOUR

T1 - Adaptive downsizing in the piscivorous cyprinid fish, Opsariichthys uncirostris, facilitates rapid establishment after introduction to a small-scale habitat in Japan

AU - Iguchi, Kei’ichiro

AU - Matsumoto, Yuta

AU - Kurita, Yoshihisa

AU - Watanabe, Katsutoshi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The three-lips (Opsariichthys uncirostris) is a piscivorous cyprinid fish native to the Biwa Lake, central Japan. A recent unintentional introduction of the species has led to its invasion of a novel, small-scale habitat (the Futatsu River) composed of a few riverine stretches connected by irrigation ditches. Comparative observations of fish samples from both habitats provide evidence of disparities in the fish’s size at maturity between the two habitats, with fish in the Futatsu River reaching maturity at smaller body sizes. Achieving a large body size at maturation requires a larger habitat offering a sufficient supply of food. Principle component analysis of body-surface morphometric characteristics revealed that the two populations show differences in both their body shape and growth rates. In the Futatsu River, the growth rates of upper jaw length, lower jaw length, eye diameter, predorsal length, and tail length were accelerated, while the growth rates of head depth, body depth, and tail depth were decelerated, leading to the acquisition of a distinctly slender body. It is plausible that small-scale habitats with less abundant food supplies favor sexual maturation at smaller body sizes and that slender bodies improve swimming performance, thus making such disproportional downsizing a consequence of adaptation to a novel environment. Whether this change is due to phenotypic plasticity or rapid evolution remains unknown.

AB - The three-lips (Opsariichthys uncirostris) is a piscivorous cyprinid fish native to the Biwa Lake, central Japan. A recent unintentional introduction of the species has led to its invasion of a novel, small-scale habitat (the Futatsu River) composed of a few riverine stretches connected by irrigation ditches. Comparative observations of fish samples from both habitats provide evidence of disparities in the fish’s size at maturity between the two habitats, with fish in the Futatsu River reaching maturity at smaller body sizes. Achieving a large body size at maturation requires a larger habitat offering a sufficient supply of food. Principle component analysis of body-surface morphometric characteristics revealed that the two populations show differences in both their body shape and growth rates. In the Futatsu River, the growth rates of upper jaw length, lower jaw length, eye diameter, predorsal length, and tail length were accelerated, while the growth rates of head depth, body depth, and tail depth were decelerated, leading to the acquisition of a distinctly slender body. It is plausible that small-scale habitats with less abundant food supplies favor sexual maturation at smaller body sizes and that slender bodies improve swimming performance, thus making such disproportional downsizing a consequence of adaptation to a novel environment. Whether this change is due to phenotypic plasticity or rapid evolution remains unknown.

UR - http://www.scopus.com/inward/record.url?scp=85063196610&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063196610&partnerID=8YFLogxK

U2 - 10.1007/s10530-019-01957-3

DO - 10.1007/s10530-019-01957-3

M3 - Article

JO - Biological Invasions

JF - Biological Invasions

SN - 1387-3547

ER -