Long-term assessment of ichthyoplankton in a large North American river system reveals changes in fish community dynamics

Tucker, Taaja R.; Roseman, Edward F.; DeBruyne, Robin L.; Pritt, Jeremy J.; Bennion, David; Hondorp, Darryl W.; Boase, James C.

doi:10.1139/cjfas-2017-0511

Cited by 13 publications

(7 citation statements)

References 75 publications

(10 reference statements)

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“…Thus, understanding temporal variation of larval and YOY fish populations is crucial for answering questions related to both applied and theoretical ecology (Quist et al., 2004). Long‐term monitoring of early life history stages allows the identification of assemblage shifts in response to changes in the environment and to determine the success of management actions, as well as providing direct evidence of appropriate spawning habitat (Copp, 1989; O’Brien et al., 2019; Trexler, 1995; Tucker et al., 2018). Thus, there is a clear need to develop and conduct effective monitoring programs on larval and YOY populations.…”

Section: Resultsmentioning

confidence: 99%

Temporal dynamics of freshwater fish assemblages, their background and methods of quantifications—A synthesis

2021

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The temporal dynamics of biotic communities have been widely examined by ecologists. However, systematic reviews on how habitat features, sampling and data evaluation influence temporal patterns are rather sporadic. Here, we reviewed 307 peer‐reviewed scientific articles to characterize the methods and the approaches, as well as to identify the knowledge gaps in the assessment of the temporal dynamics of freshwater fish assemblages with special regard to their stability patterns. The number of publications increased exponentially over decades. We revealed a highly uneven distribution of the studies among continents and ecosystems with a dominant number of papers derived from North America and Europe, and from lotic systems, especially. We also found large variability among studies even within similar habitat types in the examined spatial and temporal scales, sampling methods used, examined assemblage attributes, potential stressors and data analyses. Several knowledge gaps, such as the limited number of large‐scale studies, the insufficient knowledge on the long‐term dynamics of early life history stages and on trait‐based assemblage organization, were highlighted. For enabling meaningful comparisons of fish assemblage dynamics in space and time, further developments in standardization procedures are needed across sampling and data evaluation possibilities. Publicly accessible long‐term data sets with more details on sampling and environmental parameters would also be critically important to determine the effect of a variety of factors on the stability vs. variability of fish assemblages.

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Section: Resultsmentioning

confidence: 99%

Temporal dynamics of freshwater fish assemblages, their background and methods of quantifications—A synthesis

2021

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“…2014; Tucker et al. 2018). The weight of evidence seems to nearly rule out the Detroit River or its mouth as a successful potential spawning area.…”

Section: Discussionmentioning

confidence: 99%

Assessing potential spawning locations of Silver Chub in Lake Erie

McKenna,

Bowen,

Farver

et al. 2023

N American J Fish Manag

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ObjectiveSilver Chub Macrhybopsis storeriana, a predominately riverine species throughout its native range, exists within Lake Erie as the only known lake population. Its population declined in the 1950s and never fully recovered. Canada has listed Silver Chub in the Great Lakes–St. Lawrence River as endangered and has initiated a recovery plan that recognized the identification of spawning areas as a critical component to inform Silver Chub's recovery potential.MethodsWe investigated potential spawning locations of Silver Chub using capture records, otolith microchemistry, and daily age analysis. Lapillus otolith Sr:Ca ratios from 27 age‐0 Silver Chub were used to identify potential spawning areas. Daily ages estimated from lapilli were used to calculate hatch dates, which then were compared with capture data of adults and river flows to further inform potential spawning areas.ResultThe Detroit River (and its nearshore area) was all but ruled out as a potential spawning location. The Maumee, Portage, and Sandusky rivers or their nearshore areas were all possible spawning locations. Projected hatch dates spanned the end of May through the end of June and occurred across a wide range of flows, although some peaks in hatch dates corresponded to flow peaks, indicating recruitment is potentially enhanced by high flows.ConclusionSilver Chub spawning period and hypothesized spawning rivers or lacustuaries overlap those of invasive Grass Carp Ctenopharyngodon idella, creating a need to jointly consider Grass Carp control efforts with conservation of Silver Chub when assessing management alternatives. Further research on spawning guild and the use of rivers themselves or nearshore areas influenced by rivers as spawning areas are required to maximize potential for conservation and recovery of Silver Chub.

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“…In this study, we used DNA metabarcoding to sequence 5313 individuals from ichthyoplankton samples collected from the mouths of four large rivers in the Laurentian Great Lakes basin. River mouths are used by many species as spawning grounds and nursery habitats, but the introduction of invasive species has dramatically altered the composition of ichthyoplankton communities, especially in the Great Lakes (Tucker et al, 2018). The establishment of invasive species is challenging to detect during initial stages when population densities are low.…”

Section: Discussionmentioning

confidence: 99%

Ichthyoplankton metabarcoding: An efficient tool for early detection of invasive species establishment

Nynatten

Gallage

Lujan

et al. 2023

Molecular Ecology Resources

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Detection of invasive species is critical for management but is often limited by challenges associated with capture, processing and identification of early life stages. DNA metabarcoding facilitates large‐scale monitoring projects to detect establishment early. Here, we test the use of DNA metabarcoding to monitor invasive species by sequencing over 5000 fishes in bulk ichthyoplankton samples (larvae and eggs) from four rivers of ecological and cultural importance in southern Canada. We were successful in detecting species known from each river and three invasive species in two of the four rivers. This includes the first detection of early life‐stage rudd in the Credit River. We evaluated whether sampling gear affected the detection of invasive species and estimates of species richness, and found that light traps outperform bongo nets in both cases. We also found that the primers used for the amplification of target sequences and the number of sequencing reads generated per sample affect the consistency of species detections. However, these factors have less impact on detections and species richness estimates than the number of samples collected and analysed. Our analyses also show that incomplete reference databases can result in incorrectly attributing DNA sequences to invasive species. Overall, we conclude that DNA metabarcoding is an efficient tool for monitoring the early establishment of invasive species by detecting evidence of reproduction but requires careful consideration of sampling design and the primers used to amplify, sequence and classify the diversity of native and potentially invasive species.

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Long-term assessment of ichthyoplankton in a large North American river system reveals changes in fish community dynamics

Cited by 13 publications

References 75 publications

Temporal dynamics of freshwater fish assemblages, their background and methods of quantifications—A synthesis

Temporal dynamics of freshwater fish assemblages, their background and methods of quantifications—A synthesis

Assessing potential spawning locations of Silver Chub in Lake Erie

Ichthyoplankton metabarcoding: An efficient tool for early detection of invasive species establishment

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