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

Azour, Farivar; van Deurs, Mikael LU ; Behrens, Jane; Carl, Henrik; Hussy, Karin; Greisen, Kristian; Ebert, Rasmus and Moller, Peter Rask (2015) In Aquatic Biology 24(1). p.41-52
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Range expansion, Density-dependent growth, HSI, Gender ratio, Otolith, Dispersal
in
Aquatic Biology
volume
24
issue
1
pages
41 - 52
publisher
Inter-Research
external identifiers
  • wos:000361045800006
  • scopus:84941885428
ISSN
1864-7782
DOI
10.3354/ab00634
language
English
LU publication?
yes
id
1af7fb95-c1c5-4fe8-b16d-9b93ac6c1c96 (old id 8077388)
date added to LUP
2015-10-23 16:02:25
date last changed
2017-09-24 03:19:42
@article{1af7fb95-c1c5-4fe8-b16d-9b93ac6c1c96,
  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.},
  author       = {Azour, Farivar and van Deurs, Mikael and Behrens, Jane and Carl, Henrik and Hussy, Karin and Greisen, Kristian and Ebert, Rasmus and Moller, Peter Rask},
  issn         = {1864-7782},
  keyword      = {Range expansion,Density-dependent growth,HSI,Gender ratio,Otolith,Dispersal},
  language     = {eng},
  number       = {1},
  pages        = {41--52},
  publisher    = {Inter-Research},
  series       = {Aquatic Biology},
  title        = {Invasion rate and population characteristics of the round goby Neogobius melanostomus: effects of density and invasion history},
  url          = {http://dx.doi.org/10.3354/ab00634},
  volume       = {24},
  year         = {2015},
}