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

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 Balt...

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Autores principales:	F Azour, M van Deurs, J Behrens, H Carl, K Hüssy, K Greisen, R Ebert, PR Møller
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2015
Materias:	Biology (General) QH301-705.5 Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/ff8e494bb0e14241a82afb6a460ea293
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spelling	oai:doaj.org-article:ff8e494bb0e14241a82afb6a460ea2932021-11-18T09:17:15ZInvasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history1864-77821864-779010.3354/ab00634https://doaj.org/article/ff8e494bb0e14241a82afb6a460ea2932015-08-01T00:00:00Zhttps://www.int-res.com/abstracts/ab/v24/n1/p41-52/https://doaj.org/toc/1864-7782https://doaj.org/toc/1864-7790Round 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.F AzourM van DeursJ BehrensH CarlK HüssyK GreisenR EbertPR MøllerInter-ResearcharticleBiology (General)QH301-705.5MicrobiologyQR1-502ENAquatic Biology, Vol 24, Iss 1, Pp 41-52 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5 Microbiology QR1-502
spellingShingle	Biology (General) QH301-705.5 Microbiology QR1-502 F Azour M van Deurs J Behrens H Carl K Hüssy K Greisen R Ebert PR Møller Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history
description	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.
format	article
author	F Azour M van Deurs J Behrens H Carl K Hüssy K Greisen R Ebert PR Møller
author_facet	F Azour M van Deurs J Behrens H Carl K Hüssy K Greisen R Ebert PR Møller
author_sort	F Azour
title	Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history
title_short	Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history
title_full	Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history
title_fullStr	Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history
title_full_unstemmed	Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history
title_sort	invasion rate and population characteristics of the round goby neogobius melanostomus: effects of density and invasion history
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/ff8e494bb0e14241a82afb6a460ea293
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Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history

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