Distribution and population structure in the naked goby Gobiosoma bosc (Perciformes: Gobiidae) along a salinity gradient in two western Atlantic estuaries Citation metadata
Author
Moore, Christopher S.; Ruocchio, Matthew J.; Blakeslee, April
Abstract
Many species of fish produce larvae that undergo a prolonged dispersal phase. However,
evidence from a number of recent studies on demersal fishes suggests that the dispersal
of propagules may not be strongly correlated with gene flow. Instead, other factors
like larval behavior and the availability of preferred settlement habitat may be more
important to maintaining population structure. We used an ecologically important
benthic fish species, Gobiosoma bosc (naked goby), to investigate local and regional
scale population structure and gene flow along a salinity gradient (∼3 ppt to ∼18
ppt) in two North Carolina estuaries. G. bosc is an abundant and geographically
widespread species that requires complex but patchy microhabitat (e.g. oyster reefs,
rubble, woody debris) for reproduction and refuge. We sequenced 155 fish from
10 sites, using a common barcoding gene (COI). We also included recent sequence
data from GenBank to determine how North Carolina populations fit into the larger
biogeographic understanding of this species. In North Carolina, we found a significant
amount of gene flow within and between estuaries. Our analysis also showed high
predicted genetic diversity based upon a large number of rare haplotypes found within
many of our sampled populations. Moreover, we detected a number of new haplotypes
in North Carolina that had not yet been observed in prior work. Sampling along a
salinity gradient did not reveal any significant positive or negative correlations between
salinity and genetic diversity, nor the proportion of singleton haplotypes, with the
exception of a positive correlation between salinity standard deviation and genetic
diversity. We also found evidence that an introduced European population of naked
gobies may have originated from an Atlantic source population. Altogether, this system
offers a compelling way to evaluate whether factors other than dispersal per se mediate
recruitment in an estuarine-dependent species of fish with a larval dispersal phase. It
also demonstrates the importance of exploring both smaller and larger scale population
structure in marine organisms to better understand local and regional patterns of
population connectivity and gene flow.
Date
2018-08-07
Citation:
APA:
Moore, Christopher S., & Ruocchio, Matthew J., & Blakeslee, April. (August 2018).
Distribution and population structure in the naked goby Gobiosoma bosc (Perciformes: Gobiidae) along a salinity gradient in two western Atlantic estuaries Citation metadata.
,
(),
-
. Retrieved from
http://hdl.handle.net/10342/8525
MLA:
Moore, Christopher S., and Ruocchio, Matthew J., and Blakeslee, April.
"Distribution and population structure in the naked goby Gobiosoma bosc (Perciformes: Gobiidae) along a salinity gradient in two western Atlantic estuaries Citation metadata". .
. (),
August 2018.
September 22, 2023.
http://hdl.handle.net/10342/8525.
Chicago:
Moore, Christopher S. and Ruocchio, Matthew J. and Blakeslee, April,
"Distribution and population structure in the naked goby Gobiosoma bosc (Perciformes: Gobiidae) along a salinity gradient in two western Atlantic estuaries Citation metadata," , no.
(August 2018),
http://hdl.handle.net/10342/8525 (accessed
September 22, 2023).
AMA:
Moore, Christopher S., Ruocchio, Matthew J., Blakeslee, April.
Distribution and population structure in the naked goby Gobiosoma bosc (Perciformes: Gobiidae) along a salinity gradient in two western Atlantic estuaries Citation metadata. .
August 2018;
():
.
http://hdl.handle.net/10342/8525. Accessed
September 22, 2023.
Collections