Ecology and population structure of the bayou darter, Etheostoma rubrum: disjunct riffle habitats and downstream transport of larvae

Slack, William T.; Ross, Stephen T.; Ewing, John A.

doi:10.1007/s10641-004-0101-3

Cited by 18 publications

(19 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, Stauffer et al (1996) found that darters showed the greatest specialization during the month with the greatest habitat availability. Finally, Bayou, orangefin and spotted darters displayed similar habitat use patterns to darters in Cloud's Creek with non-random use occurring along a substratum size and depth gradient (Kessler and Thorp 1993;Slack et al 2004). Fig.…”

Section: Discussionmentioning

confidence: 90%

Microhabitat use by blackbanded (Percina nigrofasciata), turquoise (Etheostoma inscriptum), and tessellated (E. olmstedi) darters during drought in a Georgia piedmont stream

Henry

Grossman

2007

Environ Biol Fish

View full text Add to dashboard Cite

We used underwater observations to quantify microhabitat use for blackbanded, Percina nigrofaciata, turquoise, Etheostoma inscriptum, and tessellated, E. olmsteadi, darters in a 116 m reach of a Piedmont stream during 2001-2002. The sampling period and the previous 12 months were the first and second driest years on record, respectively. Spring 2002 had the greatest amount of available habitat, and principal component analysis indicated that only one of three species pairs displayed significant differences in microhabitat use during this season. Conversely, in fall 2001 (intermediate microhabitat availability), all three species used significantly different microhabitats. In general, turquoise darters used areas with greater amounts of erosional substrata, tessellated darters occurred over more depositional substrata, and blackbanded darters utilized intermediate microhabitats.During fall 2001, large blackbanded darters (≥55 mm SL) occupied faster microhabitats with more erosional substrata, and used a greater variety of depths than smaller conspecifics (40-55 mm). In fall 2001, large turquoise darters (≥40 mm) used deeper microhabitats with higher velocities and more erosional substrata than smaller individuals, whereas the opposite was true (≤50 mm in faster, more erosional, than >50 mm) in fall 2002. In general, darters did not occur in microhabitats with significantly higher invertebrate abundances, however both blackbanded and tessellated darters occupied microhabitats with higher percentages of Diptera in a single season. The inconsistent responses of darters to microhabitat prey abundance may have been influenced by extreme drought conditions.

show abstract

Section: Discussionmentioning

confidence: 90%

Microhabitat use by blackbanded (Percina nigrofasciata), turquoise (Etheostoma inscriptum), and tessellated (E. olmstedi) darters during drought in a Georgia piedmont stream

Henry

Grossman

2007

Environ Biol Fish

View full text Add to dashboard Cite

show abstract

“…Juveniles and larvae may actively move only limited distances, given their limited energy stores. However, darter larvae are common in the drift in some rivers (Turner 2001;Slack et al 2004), and perhaps accomplish much of their lifetime dispersal in that life stage. Our results are also limited to the early summer-early fall time period, the life stage between breeding and over-wintering.…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal variability of stream habitat and movement of three species of fish

Roberts

Angermeier

2006

Oecologia

View full text Add to dashboard Cite

Relationships between environmental variability and movement are poorly understood, due to both their complexity and the limited ecological scope of most movement studies. We studied movements of fantail (Etheostoma flabellare), riverweed (E. podostemone), and Roanoke darters (Percina roanoka) through two stream systems during two summers. We then related movement to variability in measured habitat attributes using logistic regression and exploratory data plots. We indexed habitat conditions at both microhabitat (i.e., patches of uniform depth, velocity, and substrate) and mesohabitat (i.e., riffle and pool channel units) spatial scales, and determined how local habitat conditions were affected by landscape spatial (i.e., longitudinal position, land use) and temporal contexts. Most spatial variability in habitat conditions and fish movement was unexplained by a site's location on the landscape. Exceptions were microhabitat diversity, which was greater in the less-disturbed watershed, and riffle isolation and predator density in pools, which were greater at more-downstream sites. Habitat conditions and movement also exhibited only minor temporal variability, but the relative influences of habitat attributes on movement were quite variable over time. During the first year, movements of fantail and riverweed darters were triggered predominantly by loss of shallow microhabitats; whereas, during the second year, microhabitat diversity was more strongly related (though in opposite directions) to movement of these two species. Roanoke darters did not move in response to microhabitat-scale variables, presumably because of the species' preference for deeper microhabitats that changed little over time. Conversely, movement of all species appeared to be constrained by riffle isolation and predator density in pools, two mesohabitat-scale attributes. Relationships between environmental variability and movement depended on both the spatiotemporal scale of consideration and the ecology of the species. Future studies that integrate across scales, taxa, and life-histories are likely to provide greater insight into movement ecology than will traditional, single-season, single-species approaches.

show abstract

“…The patchy distribution of critical habitat and fish across the landscape of a river network, or ''riverscape'' (sensu Fausch et al 2002), means that fragmented metapopulations can form within those networks (Rieman and Dunham 2000, Koizumi and Maekawa 2004, Slack et al 2004 introduced predatory fish may also be an important driver of such metapopulations, as they can fragment populations of vulnerable fish species (Labbe and Fausch 2000). Introduced fish have had severe impacts on native freshwater fish species around the world, sometimes resulting in local extinctions (Witte et al 1992, Lintermans 2000, Woodford et al 2005, and generally increasing overall extinction risks by fragmenting populations (Labbe andFausch 2000, Fagan 2002).…”

Section: Introductionmentioning

confidence: 99%

Evidence of source–sink metapopulations in a vulnerable native galaxiid fish driven by introduced trout

Woodford

McIntosh

2010

Ecological Applications

View full text Add to dashboard Cite

Introduced predators with patchy distributions can create demographic sinks within native prey populations. Such invasions may give rise to source-sink metapopulations if there are still sources of native species colonists in the landscape. In New Zealand, introduced brown trout (Salmo trutta) and rainbow trout (Oncorhychus mykiss) are linked with declines in native non-diadromous galaxiids but co-occur with these galaxiids in some locations. We investigated whether trout create sinks in Galaxias vulgaris populations, and whether trout-free reaches could act as sources, allowing persistence in the sink habitat. We conducted quantitative seasonal monitoring of G. vulgaris population structure across two subcatchments of the Waimakariri River, South Island. Two trout-free and seven trout-invaded sites in the Porter River catchment and two trout-free and five trout-invaded sites in the Broken River catchment were monitored over two winters and the adjoining summer. Spatially continuous monitoring of young-of-the-year (YOY) galaxiid distributions and apparent survival across the Broken River catchment was also undertaken. Galaxias vulgaris YOY recruitment was high in trout-free reaches, indicating positive population growth. Galaxias vulgaris was absent from three trout-invaded sites, and the remaining invaded sites had significantly depleted juvenile recruitment. Information-theoretic model selection indicated that trout, rather than habitat, drove recruitment failure. Trout-invaded sites could be divided into "sinks" that retained no YOY galaxiids, indicating no local recruitment, and "pseudosinks," which had very few recruits. Absence of small G. vulgaris at sink sites suggested population maintenance through immigration of adults from sources, whereas pseudosink sites appear capable of self-recruitment at low carrying capacities. Trout-free reaches appear to act as sources in a river network but are susceptible to future invasions by trout. Thus, not only may invasive species cause source-sink metapopulations in native species, but also the potential of refugia for natives (sources) to become future sinks highlights the vulnerability of these metapopulations when invasive predators are the principal demographic driver.

show abstract

Ecology and population structure of the bayou darter, Etheostoma rubrum: disjunct riffle habitats and downstream transport of larvae

Cited by 18 publications

References 22 publications

Microhabitat use by blackbanded (Percina nigrofasciata), turquoise (Etheostoma inscriptum), and tessellated (E. olmstedi) darters during drought in a Georgia piedmont stream

Microhabitat use by blackbanded (Percina nigrofasciata), turquoise (Etheostoma inscriptum), and tessellated (E. olmstedi) darters during drought in a Georgia piedmont stream

Spatiotemporal variability of stream habitat and movement of three species of fish

Evidence of source–sink metapopulations in a vulnerable native galaxiid fish driven by introduced trout

Contact Info

Product

Resources

About