Bioenergetic analysis of prey consumption by Bythotrephes cederstroemi in Lake Michigan

1995 ◽  
Vol 52 (1) ◽  
pp. 141-150 ◽  
Author(s):  
Peder M. Yurista ◽  
Kimberly L. Schulz
Keyword(s):  
Body Weight ◽  
Consumption Rate ◽  
Lake Michigan ◽  
Food Resource ◽  
Lake Huron ◽  
Bioenergetic Model ◽  
Bioenergetic Analysis ◽  
Bythotrephes Cederstroemi ◽  
Resource Conditions ◽  
Predation Rates

A bioenergetic model for Bythotrephes cederstroemi was constructed using measured physiological parameters to predict predation rates. The model predicts that juvenile B. cederstroemi will consume approximately 150% of their body weight per day, while adults consume 118% of their body weight per day. These rates are consistent with those of other invertebrate crustaceans. The predicted rate was twice that of an experimental measurement reported for Lake Huron B. cederstroemi; this discrepancy is attributed to experimental artifacts and to differences between B. cederstroemi populations in Lake Michigan and those in Lakes Huron and Erie. The model was most sensitive to estimation of ingestion and assimilation efficiencies and, secondarily, respiration coefficients. This model estimates the consumption rate of B. cederstroemi in Lake Michigan under optimal food resource conditions, and may be useful in predicting the future impact of B. cederstroemi predation on the zooplankton assemblages of other lakes.

Paleohydrology of the upper Laurentian Great Lakes from the late glacial to early Holocene

2009 ◽  
Vol 71 (3) ◽  
pp. 397-408 ◽  
Author(s):  
Andy Breckenridge ◽  
Thomas C. Johnson
Keyword(s):  
Great Lakes ◽  
Lake Michigan ◽  
Lake Superior ◽  
Late Glacial ◽  
Lake Huron ◽  
Michigan Basin ◽  
Great Lakes Basin ◽  
Lake Agassiz ◽  
Sharp Drop ◽  
Freshwater Fluxes

AbstractBetween 10,500 and 9000 cal yr BP, δ18O values of benthic ostracodes within glaciolacustrine varves from Lake Superior range from − 18 to − 22‰ PDB. In contrast, coeval ostracode and bivalve records from the Lake Huron and Lake Michigan basins are characterized by extreme δ18O variations, ranging from values that reflect a source that is primarily glacial (∼ − 20‰ PDB) to much higher values characteristic of a regional meteoric source (∼ − 5‰ PDB). Re-evaluated age models for the Huron and Michigan records yield a more consistent δ18O stratigraphy. The striking feature of these records is a sharp drop in δ18O values between 9400 and 9000 cal yr BP. In the Huron basin, this low δ18O excursion was ascribed to the late Stanley lowstand, and in the Lake Michigan basin to Lake Agassiz flooding. Catastrophic flooding from Lake Agassiz is likely, but a second possibility is that the low δ18O excursion records the switching of overflow from the Lake Superior basin from an undocumented northern outlet back into the Great Lakes basin. Quantifying freshwater fluxes for this system remains difficult because the benthic ostracodes in the glaciolacustrine varves of Lake Superior and Lake Agassiz may not record the average δ18O value of surface water.

scholarly journals The influence of conopid flies on bumble bee colony productivity under different food resource conditions

2018 ◽  
Vol 88 (4) ◽  
pp. 653-671 ◽  
Author(s):  
Rosemary L. Malfi ◽  
Jonathan A. Walter ◽  
T'ai H. Roulston ◽  
Clara Stuligross ◽  
Sarah McIntosh ◽  
...  
Keyword(s):  
Food Resource ◽  
Bumble Bee ◽  
Bee Colony ◽  
Resource Conditions ◽  
Colony Productivity

Influence of food availability on mate-guarding behaviour of ladybirds

2018 ◽  
Vol 108 (6) ◽  
pp. 800-806
Author(s):  
D.D. Chaudhary ◽  
G. Mishra ◽  
Omkar
Keyword(s):  
Reproductive Output ◽  
Food Resource ◽  
Mate Guarding ◽  
The Other ◽  
Egg Viability ◽  
Influence Of Food ◽  
Food Conditions ◽  
Resource Conditions ◽  
Mating Conditions ◽  
Copulatory Behaviour

AbstractA recent study on ladybird,Menochilus sexmaculatus(Fabricius) demonstrates that males perform post-copulatory mate guarding in the form of prolonged mating durations. We investigated whether food resource fluctuation affects pre- and post-copulatory behaviour ofM. sexmaculatus. It has not been studied before in ladybirds. For this, adults were subjected to prey resource fluctuations sequentially at three levels: post-emergence (Poe; 10 days), pre-mating (Prm; 24 h) and post-mating (Pom; 5 days; only female). The food resource conditions at each level could be any one of scarce, optimal or abundant. Pre-copulatory and post-copulatory behaviour, and reproductive output were assessed. Post-emergence and pre-mating nutrient conditions significantly influenced the pre-copulatory behaviour. Males reared on scarce post-emergence conditions were found to require significantly higher number of mating attempts to establish mating unlike males in the other two food conditions. Under scarce post-emergence and pre-mating conditions, time to commencement of mating and latent period were high but opposite result was obtained for mate-guarding duration. Fecundity and per cent egg viability were more influenced by post-mating conditions, with scarce conditions stopping oviposition regardless of pre-mating and post-emergence conditions. Present results indicate that pre- and post-copulatory behaviour of ladybird is plastic in nature in response to food resource fluctuations.

scholarly journals An evaluation of the relation between food consumption rate and equilibrium body-weight in male rats

1988 ◽  
Vol 60 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Tom W. Gettys ◽  
Susan Mills ◽  
Donald M. Henrickst
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Food Consumption ◽  
Consumption Rate ◽  
Growth Efficiency ◽  
Intake Rate ◽  
Total Intake ◽  
Food Consumption Rate ◽  
Maintenance Requirements ◽  
Food Intake Rate

1. Two experimental approaches were employed to assess the relation between food consumption rate and maintenance requirements in male weanling rats. The first approach involved restricting food intake in rats previously given free access to food from weaning to 59 d of age. The second approach involved restriction of food intake to various levels after weaning. Maintenance requirements (g foodid per g body-weight (W)) were estimated by dividing the rate of food consumption by the resulting equilibrium W (EBW) for each animal. In addition, food consumption was partitioned into growth-independent (maintenance) and growth-dependent (gain) components by alternately setting W and specific growth rate (W') to zero in an equation relating food intake rate to W and W. Coupling coefficients representing maintenance consumption (g food/d per g W) and gain consumption (g food/g gain) were estimated for each animal by least squares.2. Both techniques for estimating maintenance consumption provided similar estimates within and across experiments, and regardless of when food restriction was imposed or its severity, consumption for maintenance was about 5% W/d.3. The EBW to which animals in each treatment group aspired was directly proportional to that group's food intake rate.4. Coventional measures of growth efficiency were also related to food intake; efficiency decreased with decreasing food intake. Partitioning food consumption into maintenance and gain components revealed that as the rate of food intake decreased, the proportion of total intake consumed for maintenance increased. The results suggest that growth efficiency declines during food intake restriction because proportionately more of total intake is used for maintenance, leaving less available for gain.

Evidence for Yellow Perch Predation on Bythotrephes Cederstroemi in Southern Lake Michigan

1992 ◽  
Vol 18 (1) ◽  
pp. 190-193 ◽  
Author(s):  
Edward A. Baker ◽  
Scott A. Tolentino ◽  
Thomas S. McComish
Keyword(s):  
Yellow Perch ◽  
Lake Michigan ◽  
Bythotrephes Cederstroemi

Role of satiation in the functional response of a piscivore, largemouth bass (Micropterus salmoides)

2000 ◽  
Vol 57 (3) ◽  
pp. 548-556 ◽  
Author(s):  
Timothy E Essington ◽  
James R Hodgson ◽  
James F Kitchell
Keyword(s):  
Functional Response ◽  
Largemouth Bass ◽  
Consumption Rate ◽  
Micropterus Salmoides ◽  
Sustainable Consumption ◽  
Stomach Fullness ◽  
Daily Consumption ◽  
Prey Behavior ◽  
Natural Settings ◽  
Predation Rates

We evaluated whether satiation regulates the predation rates of a piscivore, largemouth bass (Micropterus salmoides), in natural settings. A functional response model indicated that predation rates can be reduced by satiation when mean prey density is high or when prey encounters are highly patchy. We then used bioenergetics modeling to estimate the predation rates of individual bass in four lakes during a 16-year period and used stomach content mass in diet samples to evaluate the variability in daily predation rates. Predation rates, expressed as the proportion (p) of the maximum daily consumption rate, were low (mode = 0.3, mean = 0.4). Stomach fullness (s), expressed as the proportion of the stomach fullness associated with the maximum sustainable consumption rate, was highly variable, and 13% of all bass diets had s > 1, indicating that bass could opportunistically forage at rates exceeding their maximum sustainable rate. The low predation rates and the ability to consume prey at rates exceeding the maximum sustainable rate make it unlikely that satiation was an important constraint on bass predation rates. Thus, satiation effects widely represented in modeling studies may be a rare component in piscivore-prey interactions, while prey behavior may be a more important component governing predation rates.

Habitat Use and Diet of the Round Goby (Neogobius melanostomus) in Coastal Areas of Lake Michigan and Lake Huron

2009 ◽  
Vol 24 (3) ◽  
pp. 477-488 ◽  
Author(s):  
Matthew J. Cooper ◽  
Carl R. Ruetz ◽  
Donald G. Uzarski ◽  
Betsy M. Shafer
Keyword(s):  
Habitat Use ◽  
Lake Michigan ◽  
Round Goby ◽  
Coastal Areas ◽  
Neogobius Melanostomus ◽  
Lake Huron

Differences in food resource allocation in a long-term selection experiment for litter size in mice 2. Developmental trends in body weight against food intake

2000 ◽  
Vol 71 (1) ◽  
pp. 39-47 ◽  
Author(s):  
W. M. Rauw ◽  
P. Luiting ◽  
M. W. A. Verstegen ◽  
O. Vangen ◽  
P. W. Knap
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Litter Size ◽  
Genetic Factors ◽  
Food Resource ◽  
Growth Efficiency ◽  
Control Line ◽  
Growing Period ◽  
Pregnancy And Lactation ◽  
Maintenance Requirements

AbstractIn the accompanying paper, specific genetic factors for body weight and food intake were identified in non-reproductive male and female mice of a line selected for high litter size at birth (average of 22 born per litter) and a non-selected control line (average of 10 born per litter). The existence of these factors are indicated by variation in efficiency parameters such as growth efficiency and maintenance requirements. Residual food intake (RFI) and Parks’ estimates of growth efficiency (AB) and maintenance requirements (MEm) were used to quantify these factors. In the growing period, females had a higher RFI (are less efficient) than males. At maturity, selected mice had higher RFI than control mice and selected females had higher RFI than selected males. AB was higher in selected-line mice than in control-line mice, and higher in males than in females. MEm was higher in selected-line mice than in control-line mice, and higher in females than in males. The results indicate the existence of specific genetic factors for both growth efficiency and maintenance requirements. Selected females may increase RFI in the adult state to anticipate the metabolically stressful periods of pregnancy and lactation, to support a genetically highly increased litter size.

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