Comparative trophic impacts of two globally invasive cyprinid fishes reveal species-specific invasion consequences for a threatened native fish

Georgina M. A. Busst; J. Robert Britton

doi:10.1111/fwb.12970

Integrating Studies of Anatomy, Physiology, and Behavior into Conservation Strategies for the Imperiled Cyprinid Fishes of the Southwestern United States

Integrative and Comparative Biology ◽

10.1093/icb/icaa031 ◽

2020 ◽

Vol 60 (2) ◽

pp. 487-496 ◽

Cited By ~ 1

Author(s):

Clinton J Moran ◽

Matthew O’Neill ◽

Alice C Gibb

Keyword(s):

United States ◽

Conservation Strategies ◽

Native Fish ◽

Southwestern United States ◽

Predator Prey ◽

Water Diversions ◽

Cyprinid Fishes ◽

Native Fishes ◽

And Behaviors ◽

And Behavior

Abstract Over the last 100 years, fishes native to the Southwestern United States have faced a myriad of biotic and abiotic pressures which has resulted in most being federally listed as endangered or threatened. Most notably, water diversions and the introduction of non-native fishes have been the primary culprits in causing the downfall of native fish populations. We describe how recent studies of morphology, physiology, and behavior yield insights into the failed (occasionally successful) management of this vanishing biota. We describe how understanding locomotor morphologies, physiologies, and behaviors unique to Southwestern native fishes can be used to create habitats that favor native fishes. Additionally, through realizing differences in morphologies and behaviors between native and non-native fishes, we describe how understanding predator–prey interactions might render greater survivorship of native fishes when stocked into the wild from repatriation programs. Understanding fundamental form–function relationships is imperative for managers to make educated decisions on how to best recover species of concern in the Southwestern United States and worldwide.

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Predation on native fish eggs by invasive round goby revealed by species‐specific gut content DNA analyses

Aquatic Conservation Marine and Freshwater Ecosystems ◽

10.1002/aqc.3409 ◽

2020 ◽

Vol 30 (8) ◽

pp. 1566-1577

Author(s):

Elisabeth Lutz ◽

Philipp Emanuel Hirsch ◽

Karen Bussmann ◽

Joschka Wiegleb ◽

Hans‐Peter Jermann ◽

...

Keyword(s):

Round Goby ◽

Native Fish ◽

Gut Content ◽

Fish Eggs ◽

Dna Analyses ◽

Species Specific

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Egg predation on native fish by invasive round goby revealed by species-specific gut content DNA analyses

10.32942/osf.io/9fpc5 ◽

2019 ◽

Author(s):

Elisabeth Lutz ◽

Philipp Hirsch ◽

Karen Bussmann ◽

Joschka Wiegleb ◽

Hans-Peter Jermann ◽

...

Keyword(s):

Freshwater Fish ◽

Round Goby ◽

Neogobius Melanostomus ◽

Native Fish ◽

Gut Content ◽

Egg Predation ◽

Spawning Period ◽

Molecular Approaches ◽

Longitudinal Connectivity ◽

Species Specific

1.Conservation of riverine fish typically aims at improving access to spawning grounds and the restoration of longitudinal connectivity requires substantial investments. However, the removal of migration barriers also enables the upstream invasion of non-native species into spawning areas, with potential negative effects on recruitment of threatened freshwater fish through egg or fry predation. 2.Detecting egg predation is often challenging. Visual gut inspections are thought to underestimate predation on soft material such as eggs and fry, which hampers the discovery of predators preying upon these life-stages. For soft materials, molecular approaches may therefore offer a more sensitive tool for detection. 3.Here, we uncover such a macroscopically invisible conservation issue caused by predation of invasive round goby (Neogobius melanostomus) predation on eggs or fry of threatened common nase (Chondrostoma nasus) in Switzerland.4.In addition, this manuscript presents species-specific molecular assays for five more valuable native fish, including endangered salmonid and cyprinid river spawners, and confirms the applicability of the assays in a series of laboratory and field feeding experiments involving eggs and fish tissue. The manuscript also provides a guiding tool for conservation managers regarding the use and applicability of different molecular approaches in gut-content analysis.5.Our results inspire recommendations for local conservation measures such as a temporary reduction of round goby densities at the spawning site prior to the spawning period, and demonstrate how the targeted application of species-specific molecular markers can inform freshwater fish management.

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Cholinesterases in Aquatic Biomonitoring: Assay Optimization and Species-Specific Characterization for a California Native Fish

Ecotoxicology ◽

10.1007/s10646-005-0010-z ◽

2005 ◽

Vol 14 (6) ◽

pp. 597-606 ◽

Cited By ~ 25

Author(s):

Andrew Whitehead ◽

Susan L. Anderson ◽

Alberto Ramirez ◽

Barry W. Wilson

Keyword(s):

Native Fish ◽

Assay Optimization ◽

Species Specific

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Electron Microscopy in the Study of Natural Phytoplankton Assemblages

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100119831 ◽

1985 ◽

Vol 43 ◽

pp. 620-623

Author(s):

Linda Sicko-Goad

Keyword(s):

Electron Microscopy ◽

Aquatic Environment ◽

Size Range ◽

Physical Parameters ◽

Specific Information ◽

Phytoplankton Assemblages ◽

Phytoplankton Productivity ◽

Ecosystem Effects ◽

Time Of Year ◽

Species Specific

Although the use of electron microscopy and its varied methodologies is not usually associated with ecological studies, the types of species specific information that can be generated by these techniques are often quite useful in predicting long-term ecosystem effects. The utility of these techniques is especially apparent when one considers both the size range of particles found in the aquatic environment and the complexity of the phytoplankton assemblages.The size range and character of organisms found in the aquatic environment are dependent upon a variety of physical parameters that include sampling depth, location, and time of year. In the winter months, all the Laurentian Great Lakes are uniformly mixed and homothermous in the range of 1.1 to 1.7°C. During this time phytoplankton productivity is quite low.

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