scholarly journals Specific Niche Characteristics Facilitate the Invasion of an Alien Fish Invader in Boreal Streams

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Kai Korsu ◽  
Jani Heino ◽  
Ari Huusko ◽  
Timo Muotka
Keyword(s):  
Fish Species ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
River System ◽  
Environmental Variable ◽  
Environmental Niche ◽  
Niche Space ◽  
Boreal Streams ◽  
Alien Fish ◽  
Alien Invader

We studied the ecological niche relations of native stream fish and an alien invader, brook trout (Salvelinus fontinalis), to examine if brook trout had located an underused environmental niche in our boreal study system. In both study years (1994 versus 2004), we found brook trout to have the most marginal niche position of all the fish species examined. The most important environmental variable affecting the distribution of brook trout was pH, with acid headwater sites being dominated by this species. Brown trout, in contrast, had relatively nonmarginal niche, occurring in average conditions across the sampled sites. Other fish species had niche positions between the two salmonids. Our results show that fish invasions may be strongly facilitated by the presence of suboptimally occupied environmental niche space in the recipient river system.

Comparative Recoveries of Planted Yearling and Fall-Fingerling Brook Trout (Salvelinus fontinalis) from Ontario Lakes

1978 ◽  
Vol 35 (4) ◽  
pp. 391-396 ◽  
Author(s):  
J. M. Fraser
Keyword(s):  
Key Words ◽  
Fish Species ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Growth Yield ◽  
Resident Species ◽  
Resident Fish ◽  
Size Groups ◽  
Resident Populations ◽  
Creel Census

Yearling and fall-fingerling brook trout (Salvelinus fontinalis) were planted in two lakes with few or no resident fish species and in three lakes with resident populations. The comparative recoveries of the two size-groups of trout planted were assessed by creel census and/or intensive gillnetting. Recoveries of planted yearling brook trout were greater from lakes supporting few or no resident fish species (15.9–35.9%) and less in lakes supporting suckers, minnows, and sticklebacks (5.9–14.8%). Experience was similar with fall fingerlings planted in the same set of lakes though comparative recoveries were less. Lakes with few fish competitors yielded 3.5–4.8 kg of trout for each kilogram of fall fingerlings planted compared with 2.9–3.0 kg for each kilogram of yearlings planted. The returns of trout from lakes also supporting resident species were only 0.3–0.8 kg for each kilogram of yearlings or fall fingerlings planted. Key words: Salvelinus fontinalis, planting, survival, growth, yield

Cadmium and copper contents in a freshwater fish species (brook trout, Salvelinus fontinalis) from the subantarctic Kerguelen Islands

Polar Biology ◽  
2010 ◽  
Vol 34 (3) ◽  
pp. 397-409 ◽  
Author(s):  
A. Jaffal ◽  
S. Paris-Palacios ◽  
S. Jolly ◽  
A. F. Thailly ◽  
L. Delahaut ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Kerguelen Islands ◽  
Freshwater Fish Species

scholarly journals Ekologi trofik komunitas ikan di Sungai Nimbai: Interaksi kompetisi dan pemangsaan terhadap ikan pelangi arfak, Melanotaenia arfakensis Allen, 1990

2019 ◽  
Vol 19 (3) ◽  
pp. 449
Author(s):  
Emmanuel Manangkalangi ◽  
M. Fadjar Rahardjo ◽  
Renny K Hadiaty ◽  
Sigid Hariyadi ◽  
Charles P. H. Simanjuntak
Keyword(s):  
Fish Species ◽  
Trophic Ecology ◽  
Anthropogenic Activities ◽  
River System ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Native Fish ◽  
Fish Samples ◽  
Alien Fish ◽  
Alien Fish Species

Information on trophic ecology can provide an understanding of the functional role of fish in an ecosystem, including endemic and native fish groups, as well as alien fish that are introduced through anthropogenic activities. The research on the trophic ecology of the fish community in the Nimbai Stream, Prafi River system, is intended to describe the interaction of competition and predation, especially towards endemic fish, Melanotaenia arfakensis. Fish samples were collected monthly from four habitat types, i.e., slow littoral, medium littoral, pool, and run from May 2016 to April 2017. A combination of an electric shocker and a hand net was used to collect fish samples. A total of 16 fish species were collected, consists of one endemic species, namely M. arfakensis, nine species of native fish, and six species of alien fish. The Arfak rainbowfish and three native fish species were categorized as insectivorous, four native fish species as herbivorous, and two other fishes as carnivorous. Three alien fish species also belong to insectivorous, two alien fish species as carnivorous, and one species as herbivorous. The niche breadth of fish communities ranges from 0.071 to 0.857. The trophic niche overlap between the Arfak rainbowfish and three native fish species and three alien fish species was recorded. The results of this study indicate a potential competition and predation interactions between Arfak rainbowfish and native fish as well as with alien fish species. Therefore, introducing alien fish into Prafi River system will disrupt Arfak rainbowfish population.

Response of fish communities to different levels of white sucker (Catostomus commersoni) biomanipulation in five temperate lakes

2001 ◽  
Vol 58 (10) ◽  
pp. 1998-2010 ◽  
Author(s):  
Philippe Brodeur ◽  
Pierre Magnan ◽  
Michel Legault
Keyword(s):  
Fish Species ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Fish Communities ◽  
White Sucker ◽  
Age At Maturity ◽  
Catostomus Commersoni ◽  
Mass Removal ◽  
Males And Females ◽  
Different Levels

The goal of this study was to evaluate the response of white sucker (Catostomus commersoni), brook trout (Salvelinus fontinalis), and other fish species to the mass removal of white sucker in five Québec (Canada) lakes. White sucker removal ranged from 14.2 kg·ha–1 to 31.3 kg·ha–1 3 years after mass removal. In four of the study lakes, the proportion of 2+ to 4+ white sucker increased following mass removal. Mean catch and biomass per unit of effort of 1+ brook trout increased significantly in the lakes where white sucker removal was highest. All white sucker populations experienced growth increases after mass removal, and improved brook trout growth was observed in lakes where the most intensive mass removal occurred. These growth increases led to higher mean length at maturity in white sucker females and decreases in mean age at maturity in white sucker males and brook trout males and females. Mean adjusted fecundity significantly increased in white sucker and brook trout in lakes where mass removal was most intense. The present study suggests that white sucker and brook trout exhibit compensatory responses following a reduction of intra- and inter-specific competition and that these responses are related to the intensity of mass removal.

Crustacean Plankton Communities of the Matamek River System and their Variation with Predation

1975 ◽  
Vol 32 (12) ◽  
pp. 2530-2535 ◽  
Author(s):  
G. F. Pope ◽  
J. C. H. Carter
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
River System ◽  
Crustacean Plankton ◽  
Almost All ◽  
Plankton Communities

The crustacean plankton communities of lakes with fish planktivores and low densities of Chaoborus larvae contained greater numbers of noncyclopoid crustacean predators but lower numbers of the larger herbivores. Lakes with brook trout (Salvelinus fontinalis) only and low densities of Chaoborus larvae, had plankton communities whose biomasses were dominated by the larger herbivores. The communities of lakes with no fish and high densities of larvae were dominated by the smaller herbivores, although the larger species were present in some. The noncyclopoid, crustacean predators were absent from almost all of these lakes.

Parasite-induced susceptibility to predation in diplostomiasis

Parasitology ◽  
1982 ◽  
Vol 85 (3) ◽  
pp. 495-501 ◽  
Author(s):  
P. Brassard ◽  
M. E. Rau ◽  
M. A. Curtis
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Marked Decrease ◽  
Infected Fish ◽  
Induced Susceptibility ◽  
Diplostomum Spathaceum

Guppies (Lebistes reticulatis) exposed to doses as low as 25 cercariae of Diplostomum spathaceum for 30 min were consistently and significantly more susceptible to predation by brook trout (Salvelinus fontinalis) than uninfected controls. The increase in susceptibility to predation was correlated with a marked decrease in the activity of infected fish.

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