Recovery of zooplankton assemblages in mountain lakes from the effects of introduced sport fish

2001 ◽  
Vol 58 (9) ◽  
pp. 1822-1830 ◽  
Author(s):  
David B Donald ◽  
Rolf D Vinebrooke ◽  
R Stewart Anderson ◽  
Jim Syrgiannis ◽  
Mark D Graham
Keyword(s):  
Fish Community ◽  
Mountain Lakes ◽  
Zooplankton Species ◽  
Introduced Fish ◽  
Fish Stocking ◽  
Fish Removal ◽  
Fishless Lakes ◽  
Chi Squared ◽  
Community Complexity ◽  
Sport Fish

Impacts of introduced fish on zooplankton assemblages of lakes may persist for decades following fish removal. We tested this hypothesis by comparing zooplankton assemblages from four categories of lakes located in western Canadian mountain parks including lakes without and with fish that differed in their fish community complexity and fish-stocking history. Zooplankton species richness was greatest in lakes with a complex community of fish and least in pristine fishless lakes. Canonical correspondence analysis showed that taxonomic shifts in zooplankton assemblages could be attributed to differences in fish-stocking history between the study lakes. In fishless lakes, larger copepods (Eucyclops agilis, Diaptomus leptopus), cladocerans (Diaphanosoma, large Daphnia), and chaoborids were abundant, whereas in the presence of fish, small crustaceans were more common and chaoborids were relatively rare. Once introduced trout were absent from lakes, recovery trajectories for zooplankton showed a general taxonomic shift towards assemblages characteristic of fishless lakes that had never been fish stocked. Based on separation between previously stocked fishless lakes and naturally fishless mountain lakes in ordination space (chi-squared distance), taxonomic recovery by zooplankton assemblages from the influence of introduced salmonids may require an average of 19 years.

scholarly journals Predation by introduced fish can magnify the terrestrial arthropod subsidies in mountain lakes

2018 ◽  
Vol 75 (9) ◽  
pp. 1453-1464 ◽  
Author(s):  
Matteo Rolla ◽  
Geordie Biffoni ◽  
Stefano Brighenti ◽  
Rocco Iacobuzio ◽  
Kevin Liautaud ◽  
...  
Keyword(s):  
Brook Trout ◽  
Food Resource ◽  
Mountain Lakes ◽  
High Mountain ◽  
Introduced Fish ◽  
Fishless Lakes ◽  
Terrestrial Arthropods ◽  
Conservation Implications ◽  
Air Interface ◽  
Terrestrial Subsidies

A portion of the terrestrial subsidies to lentic habitats consists of arthropods. In high mountain, originally fishless lakes, terrestrial arthropods are an important seasonal food resource for introduced fish. Here we investigate how brook trout (Salvelinus fontinalis) can alter the input of terrestrial arthropods in 10 high mountain lakes contrasting for their stocking history (with and without fish or manipulated for fish eradication). We used a food consumption model to calculate the minimum and maximum number or biomass of arthropods consumed by fish, and we found that they can exceed, by several folds, the number or biomass of arthropods sinking into the lakes, at least under the metabolic rates expected for fish for most of the summer. We interpret this result as an indirect indication that arthropods usually cannot overcome the surface tension at the lake surface and that fish can work as a vector across the water–air interface. We infer that pathways for dead and live arthropods to leave the lakes do exist and fish can transfer into the water column many arthropods whose fate was leaving the lakes, which may have overlooked ecological and conservation implications.

Freshwater Zooplankton Community Structure: Introduction of Large Invertebrate Predators and Large Herbivores to a Small Species Community

1988 ◽  
Vol 45 (10) ◽  
pp. 1758-1770 ◽  
Author(s):  
Michael J. Vanni
Keyword(s):  
Introduced Species ◽  
Zooplankton Community ◽  
Zooplankton Species ◽  
Small Species ◽  
Daphnia Galeata ◽  
Resident Species ◽  
Large Herbivores ◽  
Fishless Lakes ◽  
Invertebrate Predators ◽  
Daphnia Galeata Mendotae

Two hypotheses have been proposed to explain the scarcity of small zooplankton species in fishless lakes, in which large zooplankton species dominate: (1) selective predation on small species by large invertebrate predators and (2) competitive suppression of small species by large herbivores. These hypotheses were tested at the Experimental Lakes Area (ELA) by introducing a large invertebrate predator, Chaoborus americanus, and a large herbivore, Daphnia catawba, both common in fishless ELA lakes, into a zooplankton community typical of ELA lakes with fish (small zooplankton species present). Chaoborus had much more of an impact than D. catawba on resident zooplankton, although both introduced species significantly reduced the abundance of some resident species. Daphnia galeata mendotae, the dominant species in the absence of introduced species, was reduced to virtual extinction by Chaoborus. The cladocerans Bosmina and Diaphanosoma, the copepods Diaptomus spp., and the rotifer Conochilus also were reduced in abundance by Chaoborus. Daphnia galeata mendotae and Bosmina were the only resident species consistently reduced in abundance by D. catawba. These results support current conceptual models that depict invertebrate predation as an important factor responsible for the relative scarcity of small zooplankton species in fishless lakes.

Limited parasite acquisition by non-native Lepomis gibbosus (Actinopterygii: Centrarchidae) at two ponds in the Upper Rhine basin, Germany

2018 ◽  
Vol 93 (04) ◽  
pp. 453-460 ◽  
Author(s):  
M. Ondračková ◽  
Y. Kvach ◽  
A. Martens ◽  
P. Jurajda
Keyword(s):  
North American ◽  
Fish Community ◽  
Condition Index ◽  
North American Species ◽  
Parasitic Nematodes ◽  
Lepomis Gibbosus ◽  
Introduced Fish ◽  
Parasite Communities ◽  
The North ◽  
Upper Rhine

AbstractMetazoan parasite communities of Lepomis gibbosus (Centrarchidae), one of the most successfully introduced fish species in Europe, were studied at two isolated ponds (Knielingen, Tropfen) along the Upper Rhine in Germany. Nine parasite taxa were observed, including North American species co-introduced to Europe (ancyrocephalid monogeneans, diplostomid trematodes), circumpolar species infecting L. gibbosus in both their native and non-native ranges (bothriocephalid cestodes) and locally acquired parasitic nematodes. Both parasite communities consisted predominantly of North American species. Acquisition of local parasites was not observed at Tropfen, where the fish community comprised just two species, with L. gibbosus dominant. Low prevalence and abundance of acquired parasites was found at Knielingen, which supported a diverse fish community. At Tropfen, a high abundance of the North American parasite Posthodiplostomum centrarchi probably contributed to the lower condition index, hepatomegaly and splenomegaly observed. Due to low local parasite competency, L. gibbosus appears to have no significant impact on parasite dynamics in affected habitats.

The effects of mechanically reducing northern pike density on the sport fish community of West Long Lake, Nebraska, USA

2008 ◽  
Vol 15 (4) ◽  
pp. 251-258 ◽  
Author(s):  
J. C. JOLLEY ◽  
D. W. WILLIS ◽  
T. J. DEBATES ◽  
D. D. GRAHAM
Keyword(s):  
Fish Community ◽  
Northern Pike ◽  
Sport Fish

scholarly journals Mountain lakes of Mont Avic Natural Park: ecological features and conservation issues

2019 ◽  
Vol 79 (1) ◽  
Author(s):  
Rocco Tiberti ◽  
Francesco Buscaglia ◽  
Marco Armodi ◽  
Cristiana Callieri ◽  
Fabio Ribelli ◽  
...  
Keyword(s):  
Organic Pollution ◽  
Mountain Lakes ◽  
Reference Database ◽  
Ecological Knowledge ◽  
Italian Alps ◽  
Introduced Fish ◽  
Ecological Data ◽  
Natural Park ◽  
Ecological Features ◽  
Conservation Problem

Mountain lakes provide some fundamental ecosystem services (i.e., water supply for drinking and energy production) and have an enormous aesthetic and conservation value. Ecological knowledge on mountain lakes, however, is still scarce and limited to a few geographical areas and mainly to abiotic features. To fill this gap, a limnological campaign was carried out on 19 lakes of the Mont Avic Natural Park (Aosta, Western Italian Alps). Bathymetric maps of the lakes are provided in this paper, as is data on the lakes’ physical properties, chemistry, nano- and pico-plankton, zooplankton, littoral macroinvertebrates, amphibians and introduced fish. The aim of this study was to create a reference database of ecological data for the development of new studies and conservation measures/actions. To this end, ecological data are discussed from both a limnological and a conservation perspective, allowing for the identification of major threats affecting the lakes in the protected area. Despite local threats which include water exploitation, organic pollution, and introduced fish, water quality was good. Lake biota can however be affected by such threats, in particular introduced fish (Salmonidae and Cyprinidae), representing a challenging conservation problem.

scholarly journals Effects of the introduction of an omnivorous fish on the biodiversity and functioning of an upland Amazonian lake

2019 ◽  
Vol 49 (3) ◽  
pp. 221-231
Author(s):  
Regina L. G. NOBRE ◽  
Adriano CALIMAN ◽  
Rafael D. GUARIENTO ◽  
Reinaldo L. BOZELLI ◽  
Luciana S. CARNEIRO
Keyword(s):  
Food Web ◽  
Phosphorus Limitation ◽  
Freshwater Ecosystems ◽  
Data Series ◽  
Macroinvertebrate Communities ◽  
Introduced Fish ◽  
Fish Introduction ◽  
Omnivorous Fish ◽  
Fishless Lakes ◽  
Food Web Theory

ABSTRACT The introduction of nonnative species is one of the main threats to freshwater ecosystems. Although omnivory and intraguild predation are common in those systems, little is known about the effects of introduced omnivorous fish on pelagic and littoral communities. This study tested predictions of food-web theory regarding the effects of omnivorous fish introduction on previously fishless lakes in the Amazonian uplands of Serra dos Carajás, Pará, Brazil. The trophic structure of two similar lakes, one with and the other without the introduced omnivorous fish Astyanax bimaculatus, was compared using a data series of biotic variables collected from both lakes twice a year from 2010 to 2013. Zooplankton was more abundant in the lake with fish, and the zooplankton composition differed between lakes. Phytoplankton richness and chlorophyll-a were higher in the lake with the introduced fish than in the fishless lake regardless of phosphorus limitation. For the benthic macroinvertebrate communities, species richness and biomass were higher in the fishless lake. Our results also indicate that A. bimaculatus has the potential to link pelagic and littoral habitats through nutrient cycling. The differences observed between the studied lakes are consistent with predictions from food-web theory regarding the effects of multichain omnivorous fish on trophic dynamics. Despite limitations regarding replication at the ecosystem level, it is possible to infer from our findings that the introduction of an omnivorous fish might have changed lake overall functioning.

Trophic interactions between native and introduced fish species in a littoral fish community

2014 ◽  
Vol 85 (5) ◽  
pp. 1693-1706 ◽  
Author(s):  
M. Monroy ◽  
A. Maceda-Veiga ◽  
N. Caiola ◽  
A. De Sostoa
Keyword(s):  
Fish Species ◽  
Trophic Interactions ◽  
Fish Community ◽  
Introduced Fish ◽  
Littoral Fish
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