Invasion rate and population characteristics of the invasive round goby Neogobius melanostomus: effects of density and invasion history

Farivar Azour, Mikael van Deurs, Jane Behrens, Henrik Carl, Karin Hüssy, Kristian Greisen, Rasmus Ebert, Peter Rask Møller

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Abstract

Round goby Neogobius melanostomus is currently one of the most wide-ranging invasive fish species in Europe and North America. The present study demonstrates how the distribution of round goby has expanded from 2008 to 2013 at a rate of about 30 km yr−1 along the Danish coastline in the western Baltic Sea. Further analyses showed that fish from an established
high-density round goby population were slow-growing and displayed poorer condition (weight at age and hepatosomatic index) compared to fish sampled from recently invaded locations (i.e. at the forefront of the distribution range). The established population revealed a broad age distribution and a 1:1 gender ratio, while fish from a recently invaded site were primarily of intermediate
ages with a male-biased gender ratio. Otolith analyses suggested that the oldest individuals from the recently invaded area experienced superior growth conditions only in the most recent years, suggesting immigration into the area as adults. Our results suggest that intraspecific competition for food may cause continued dispersal of the species and that population demographics likely
relate to invasion history
Original languageEnglish
JournalAquatic Biology
Volume24
Pages (from-to)41-52
ISSN1864-7782
DOIs
Publication statusPublished - 2015

Cite this

@article{5c78ffd564444a74948747f73b9df34d,
title = "Invasion rate and population characteristics of the invasive round goby Neogobius melanostomus: effects of density and invasion history",
abstract = "Round goby Neogobius melanostomus is currently one of the most wide-ranging invasive fish species in Europe and North America. The present study demonstrates how the distribution of round goby has expanded from 2008 to 2013 at a rate of about 30 km yr−1 along the Danish coastline in the western Baltic Sea. Further analyses showed that fish from an establishedhigh-density round goby population were slow-growing and displayed poorer condition (weight at age and hepatosomatic index) compared to fish sampled from recently invaded locations (i.e. at the forefront of the distribution range). The established population revealed a broad age distribution and a 1:1 gender ratio, while fish from a recently invaded site were primarily of intermediateages with a male-biased gender ratio. Otolith analyses suggested that the oldest individuals from the recently invaded area experienced superior growth conditions only in the most recent years, suggesting immigration into the area as adults. Our results suggest that intraspecific competition for food may cause continued dispersal of the species and that population demographics likelyrelate to invasion history",
author = "Farivar Azour and Deurs, {Mikael van} and Jane Behrens and Henrik Carl and Karin H{\"u}ssy and Kristian Greisen and Rasmus Ebert and M{\o}ller, {Peter Rask}",
year = "2015",
doi = "10.3354/ab00634",
language = "English",
volume = "24",
pages = "41--52",
journal = "Aquatic Biology",
issn = "1864-7782",
publisher = "Inter Research",

}

Invasion rate and population characteristics of the invasive round goby Neogobius melanostomus: effects of density and invasion history. / Azour, Farivar; Deurs, Mikael van; Behrens, Jane; Carl, Henrik; Hüssy, Karin; Greisen, Kristian; Ebert, Rasmus; Møller, Peter Rask.

In: Aquatic Biology, Vol. 24, 2015, p. 41-52.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Invasion rate and population characteristics of the invasive round goby Neogobius melanostomus: effects of density and invasion history

AU - Azour, Farivar

AU - Deurs, Mikael van

AU - Behrens, Jane

AU - Carl, Henrik

AU - Hüssy, Karin

AU - Greisen, Kristian

AU - Ebert, Rasmus

AU - Møller, Peter Rask

PY - 2015

Y1 - 2015

N2 - Round goby Neogobius melanostomus is currently one of the most wide-ranging invasive fish species in Europe and North America. The present study demonstrates how the distribution of round goby has expanded from 2008 to 2013 at a rate of about 30 km yr−1 along the Danish coastline in the western Baltic Sea. Further analyses showed that fish from an establishedhigh-density round goby population were slow-growing and displayed poorer condition (weight at age and hepatosomatic index) compared to fish sampled from recently invaded locations (i.e. at the forefront of the distribution range). The established population revealed a broad age distribution and a 1:1 gender ratio, while fish from a recently invaded site were primarily of intermediateages with a male-biased gender ratio. Otolith analyses suggested that the oldest individuals from the recently invaded area experienced superior growth conditions only in the most recent years, suggesting immigration into the area as adults. Our results suggest that intraspecific competition for food may cause continued dispersal of the species and that population demographics likelyrelate to invasion history

AB - Round goby Neogobius melanostomus is currently one of the most wide-ranging invasive fish species in Europe and North America. The present study demonstrates how the distribution of round goby has expanded from 2008 to 2013 at a rate of about 30 km yr−1 along the Danish coastline in the western Baltic Sea. Further analyses showed that fish from an establishedhigh-density round goby population were slow-growing and displayed poorer condition (weight at age and hepatosomatic index) compared to fish sampled from recently invaded locations (i.e. at the forefront of the distribution range). The established population revealed a broad age distribution and a 1:1 gender ratio, while fish from a recently invaded site were primarily of intermediateages with a male-biased gender ratio. Otolith analyses suggested that the oldest individuals from the recently invaded area experienced superior growth conditions only in the most recent years, suggesting immigration into the area as adults. Our results suggest that intraspecific competition for food may cause continued dispersal of the species and that population demographics likelyrelate to invasion history

U2 - 10.3354/ab00634

DO - 10.3354/ab00634

M3 - Journal article

VL - 24

SP - 41

EP - 52

JO - Aquatic Biology

JF - Aquatic Biology

SN - 1864-7782

ER -