Production and Growth Efficiency of Brook Trout (Salvelinus fontinalis) in Two Adirondack Mountain (New York) Lakes Following Liming

1989 ◽  
Vol 46 (2) ◽  
pp. 333-341 ◽  
Author(s):  
Carl L. Schofield ◽  
Steven P. Gloss ◽  
Barbara Plonski ◽  
Robert Spateholts
Keyword(s):  
New York ◽  
Brook Trout ◽  
Production Efficiency ◽  
Salvelinus Fontinalis ◽  
Size Structure ◽  
Food Limitation ◽  
Growth Efficiency ◽  
Limited Range ◽  
First Year ◽  
Adirondack Lakes

Yearling and spring fingerling brook trout (Salvelinus fontinalis) stocked in two Adirondack lakes after liming in the spring of 1985 produced 10–14 kg∙ha−1yr−1 at average standing crops of 8–10 kg∙ha−1 during the first year after stocking. These values were similar to levels observed in other limed and circumneutral Adirondack lakes, which collectively support a limited range of biomass (10–20 kg∙ha−1) and production (7–16 kg∙ha−1) compared with more fertile waters in other regions. The estimated level of food consumption required to maintain initial production rates observed in the two limed lakes was 80–100 kg∙ha−1. This level of predation was sufficient to significantly alter the size structure and composition of the invertebrate prey community within a few months after stocking. However, mean production efficiency in these populations remained at levels of 20–25% and the development of adverse water quality conditions in the first year after liming appeared to be of greater significance than food limitation in regulating production and biomass of these stocked brook trout populations. Reacidification of one lake 5 mo after liming resulted in rapid declines in biomass and production as a result of both increased mortality and reduced growth.

Performance of Indigenous, Exotic, and Hybrid Strains of Brook Trout (Salvelinus fontinalis) in Waters of the Adirondack Mountains, New York

1981 ◽  
Vol 38 (12) ◽  
pp. 1701-1707 ◽  
Author(s):  
Dwight A. Webster ◽  
William A. Flick
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Hybrid Vigor ◽  
Superior Performance ◽  
Adirondack Mountains ◽  
Wild Strains ◽  
Early Fall ◽  
Survival And Growth ◽  
Wild Trout

Eleven year-classes of wild, domestic, and wild × domestic hybrid strains of brook trout (Salvelinus fontinalis) were stocked in a 0.19-ha Adirondack pond. Comparative survival and growth were assessed upon drainage in early fall. Rearing native wild strains to maturity in a hatchery, or domestic strains in a natural environment, did not consistently or materially affect survival of progeny, suggesting that superior performance of wild strains was largely inherent. Interstrain hybrids of wild × domestic showed survivals equivalent to the wild parents, but hybrids of two Canadian strains gave evidence of heterosis in both survival and net yield. Supplementary observations in other waters also indicated that one strain (Assinica) may be less adaptable to Adirondack conditions than the other (Temiscamie).Key words: brook trout, wild trout, domesticated trout, interstrain hybrid trout, survival, growth, heterosis, hybrid vigor

Differences in sexual maturity and fall emigration between diploid and triploid brook trout (Salvelinus fontinalis) in an Adirondack lake

1997 ◽  
Vol 54 (8) ◽  
pp. 1808-1812 ◽  
Author(s):  
J A Warrillow ◽  
D C Josephson ◽  
W D Youngs ◽  
C C Krueger
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Gonadal Development ◽  
Spawning Habitat ◽  
Diploid Males ◽  
Reproductive Risk ◽  
Spawning Areas ◽  
In Captivity ◽  
Adirondack Lakes ◽  
Triploid Fish

High levels of emigration coincident with maturity and spawning have been reported from brook trout (Salvelinus fontinalis) populations in Adirondack lakes. These lakes typically had few spawning areas and required stocking to maintain populations. We compared diploid and triploid brook trout to identify differences in gonadal development and emigration. Age 1 + and 2 + diploid and triploid brook trout held in captivity were examined internally for gonadal development. More diploid trout were mature than triploid fish (p < 0.01). Of triploid brook trout that matured, all were males. Yearling diploid and triploid brook trout were also stocked into a lake that had an outlet but no spawning areas. During the fall spawning season, only mature yearling triploid males, diploid males, and diploid females were caught in an outlet trap. No triploid females were caught. A greater proportion of diploids emigrated than triploids (p < 0.01). Triploidy in females arrested emigration by preventing sexual maturation. Triploid male brook trout should not be stocked because they can pose a reproductive risk to wild brook trout downstream from lakes. Stocking triploid females could reducefall emigration and thus reduce the loss of catchable brook trout from Adirondack lakes with outlets and little spawning habitat.

Production of Wild, Domestic, and Interstrain Hybrids of Brook Trout (Salvelinus fontinalis) in Natural Ponds

1976 ◽  
Vol 33 (7) ◽  
pp. 1525-1539 ◽  
Author(s):  
William A. Flick ◽  
Dwight A. Webster
Keyword(s):  
New York ◽  
Economic Evaluation ◽  
Life Span ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
James Bay ◽  
Natural Lakes ◽  
Wild Strains ◽  
Survival And Growth ◽  
Adirondack Mountain

Hatchery-reared wild and domestic strains of brook trout (Salvelinus fontinalis) were released in natural lakes, and survival and growth estimated at semiannual intervals throughout the life span. Angling was restricted. Four experiments with two year-classes involved three different Adirondack Mountain (New York) wild strains and two domestic strains, a fifth experiment included two wild strains from James Bay, Quebec and a hybrid between one of these (Assinica Lake) and a New York domestic strain. Wild and hybrid strains consistently exhibited greater longevity (5–7 yr) compared with domestic (few recovered after 3 yr). Climax sizes were not much different, except the Domestic × Assinica hybrid that was substantially larger than either of the two parents. Gross production and yield to angling of any given strain cohort was correlated (r = 0.93) and life-span gross production was 50% greater for wild and hybrid groups per unit fish stocked. Biomass stocked per recruit was much larger for domestic strains, and taking this into account, the ratio of gross production to weight stocked was about 6 times greater. Increased costs of rearing nondomesticated strains, if any, must be taken into consideration in an economic evaluation, but use of wild and/or hybrid strains of trout offers significant benefits under management conditions of these experiments.

scholarly journals Allometric scaling of eDNA production in stream‐dwelling brook trout ( Salvelinus fontinalis ) inferred from population size structure

2020 ◽  
Author(s):  
Matthew C. Yates ◽  
Taylor M. Wilcox ◽  
Kevin S. McKelvey ◽  
Michael K. Young ◽  
Michael K. Schwartz ◽  
...  
Keyword(s):  
Population Size ◽  
Brook Trout ◽  
Allometric Scaling ◽  
Salvelinus Fontinalis ◽  
Size Structure ◽  
Population Size Structure

Selection of Factors Affecting the Presence of Brook Trout (Salvelinus fontinalis) in Adirondack Lakes: A Case Study

1992 ◽  
Vol 49 (3) ◽  
pp. 597-608 ◽  
Author(s):  
J. J. Beauchamp ◽  
S. W. Christensen ◽  
E. P. Smith
Keyword(s):  
Logistic Regression ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Model Development ◽  
Predictive Ability ◽  
Absolute Magnitude ◽  
Regression Diagnostics ◽  
Data Set ◽  
Factors Affecting ◽  
Adirondack Lakes

We used multiple logistic regression techniques to develop models for estimating the probability of brook trout (Salvelinus fontinalis) presence/absence as a function of observable water chemistry variables and watershed characteristics. The data set consists of the Adirondack Lakes Survey Corporation data collected on 1469 lakes during 1984–87. Two models fitted to a randomly selected development subset of lakes, using two sets of candidate explanatory/predictor variables of particular interest, were compared on the basis of coefficient consistency and predictive ability. In addition to the usual maximum likelihood logistic regression results, we also applied collinearity and other associated diagnostics and variable-selection procedures designed specifically for the logistic regression model to arrive at parsimonious models. Both models correctly predicted fish presence in more than 85% of the model development set and more than 80% of the lakes in the verification data. For those variables appearing in both models, the signs of the estimated coefficients were the same and in agreement with expectation. The removal of influential observations, as indicated by the logistic regression diagnostics, caused all of the estimated coefficients to increase in absolute magnitude. This results in a model which is more sensitive to changes in the explanatory variables.

Response of Limnetic Insect Populations of Two Acidic, Fishless Lakes to Liming and Brook Trout (Salvelinus fontinalis)

1989 ◽  
Vol 46 (2) ◽  
pp. 342-351 ◽  
Author(s):  
Richard A. Evans
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Rapid Reduction ◽  
Density Estimates ◽  
Predator Prey ◽  
Fishless Lakes ◽  
Lower Sign ◽  
Insect Populations ◽  
Seasonal Population

Seasonal population density estimates of limnetic insects in two Adirondack (New York) lakes were obtained from horizontal and vertical net tows and benthic sweep net samples over a 3-yr period; 1 yr while the lakes were acidic and fishless, and 2 yr following addition of (calcium carbonate) CaCO3 and the introduction of brook trout (Salvelinus fontinalis). Before treatment, the limnetic insect assemblages in the study lakes resembled those reported from acidic and/or fishless lakes in Sweden and Canada. Maximum densities of dominant taxa were: Notonectidae; 1.5∙m−3; Corixidae; 1.1∙m−3, Graphoderus (Dytiscidae) larvae; 0.27∙m−3; and Chaoborus americanus; 400∙m−3. Within 3 mo after treatment, all limnetic populations were near or below the detection limit (0.01∙m−3). Limnetic densities of notonectids, corixids, and C. americanus were significantly lower (Mann–Whitney U-tests), and benthic densities of Hemiptera and Coleoptera tended to be lower (sign tests) the summer after treatment than the previous summer. Calculated trout predation levels on Hemiptera and C. americanus, and evidence from the literature, strongly suggest that predation was the major cause of reduced limnetic insect populations. The rapid reduction or elimination of these populations indicates considerable instability of the predator–prey relationships of acidic lakes which have been recently limed and stocked with fish.

Effects of Neutralization and Addition of Brook Trout (Salvelinus fontinalis) on the Limnetic Zooplankton Communities of Two Acidic

1989 ◽  
Vol 46 (2) ◽  
pp. 295-305 ◽  
Author(s):  
William R. Schaffner
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Cyclopoid Copepod ◽  
Population Responses ◽  
Woods Lake ◽  
Daphnia Catawba ◽  
The Individual ◽  
Zooplankton Communities ◽  
Positive Effect

The zooplankton communities in two acidified lakes in the Adirondack region of New York changed considerably following liming and the reintroduction of brook trout (Salvelinus fontinalis). Most rotifer taxa were greatly reduced in numbers within a week following base addition. Keratella taurocephala declined by orders of magnitude in both lakes. Rotifer species that replaced K. taurocephala were far less abundant. The crustacean communities were also affected by liming. Diaptomus minutus, the dominant in both lakes, declined following base addition. Longer-term population responses appeared to be related to the dynamics of the individual populations, and changes in predation pressure. Four additional crustacean species became prominent in the lakes after liming: the caldocerans Bosmina longirostris and Daphnia catawba in Cranberry Pond, and D. catawba and the cyclopoid copepod Cyclops scutifer in Woods Lake. Over the longer-term liming and the introduction of brook trout tended to have an overall positive effect on the zooplankton communities in the two lakes.

Sign in / Sign up

Export Citation Format

Share Document