Bioenergetic responses of a benthic forage fish (Fundulus heteroclitus) to habitat degradation and altered prey community in polluted salt marshes

2010 ◽  
Vol 67 (10) ◽  
pp. 1566-1584 ◽  
Author(s):  
Daisuke Goto ◽  
William G. Wallace
Keyword(s):  
Food Consumption ◽  
Salt Marshes ◽  
Fundulus Heteroclitus ◽  
Balance Model ◽  
Compensatory Mechanism ◽  
Habitat Condition ◽  
Lower Growth ◽  
Metabolic Costs ◽  
Consumption Rates ◽  
Benthic Prey

In this study, we examined bioenergetic responses of age-2+ and age-3+ mummichogs ( Fundulus heteroclitus ) to degraded habitat condition and impoverished benthic prey community in polluted salt marshes by incorporating in situ food consumption rates with the mercury mass balance model technique. In general, bioenergetic responses of mummichogs appeared to be more related to benthic prey community than habitat condition. Fish from prey-impoverished marsh (PIM) sites generally had significantly elevated total metabolic costs compared with those from non-prey-impoverished marsh (NPIM) sites. However, the PIM populations also had ~two- to three-fold higher consumption rates than the NPIM populations, suggesting that the PIM populations may be capable of adjusting food consumption to offset elevated metabolic costs. Furthermore, only age-2+ females of the PIM populations had significantly reduced growth rates, whereas there was little among-site differences for age-2+ males and age-3+ fish, indicating that an increased consumption by the PIM populations may also have been a compensatory mechanism to maintain growth. Most of the PIM populations, however, had substantially (up to 80%) lower growth conversion efficiency relative to the NPIM populations. These findings suggest that pollution-tolerant fishes such as mummichogs may have energetic costs of living in chronically degraded habitats.

Early juvenile bioenergetic differences between anadromous and resident brook trout (Salvelinus fontinalis)

2003 ◽  
Vol 60 (4) ◽  
pp. 401-410 ◽  
Author(s):  
Geneviève R Morinville ◽  
Joseph B Rasmussen
Keyword(s):  
Brook Trout ◽  
Large Scale ◽  
Salvelinus Fontinalis ◽  
Stable Carbon Isotope ◽  
Fish Muscle ◽  
Partial Migration ◽  
Fish Growth ◽  
Lower Growth ◽  
Metabolic Costs ◽  
Consumption Rates

Many salmonids, including brook trout (Salvelinus fontinalis), contain both anadromous (migrant) and nonanadromous (resident) forms within a population (partial migration). Although partial migration is commonly observed, the mechanisms governing the adoption of migration or residency are poorly understood. We used field estimates of fish growth coupled with in situ estimates of food consumption rates to demonstrate that a trade-off exists between the ability to efficiently exploit local environments (resident approach) and the capacity to capitalize from large-scale environmental heterogeneity (migrant approach). We demonstrate that in the year before migration, migrant brook trout have consumption rates 1.4 times higher than those of resident brook trout. However, migrants have lower growth efficiencies (ratio of growth to consumption) than residents, indicating that migrants have higher metabolic costs. Residents and migrants also differed in their stable carbon isotope signatures (δ13C), a time-integrated measure that has been linked to habitat use. Fish muscle δ13C of migrants was depleted by 1 ± 0.1‰ compared with that of residents, and this could not be explained by any biases introduced by the time of sampling or the size of fish sampled. Our findings thus agree with the notion that a link exists between metabolic costs (efficiency) and the adopted life-history strategy.

Estimating food consumption rates of fish using a mercury mass balance model

2000 ◽  
Vol 57 (2) ◽  
pp. 414-428 ◽  
Author(s):  
Marc Trudel ◽  
Alain Tremblay ◽  
Roger Schetagne ◽  
Joseph B Rasmussen
Keyword(s):  
Mass Balance ◽  
Food Consumption ◽  
Egg Production ◽  
Energy Requirement ◽  
Balance Model ◽  
Mass Balance Model ◽  
Simple Method ◽  
Consumption Rates ◽  
Using Data

We present a simple method for estimating food consumption rates of fish in the field based on a mercury (Hg) mass balance model. This method requires the determination of fish age, size, and growth and Hg concentration in fish and their food. The model was validated using data obtained from a previously published laboratory experiment. A field test of the model showed that food consumption rates determined with the Hg mass balance model differed from independent estimates obtained with the 137Cs method by only 0.6-16.1%. The model was applied to fish from various lakes in Quebec and Ontario. Food consumption rates estimated with the Hg mass balance model varied significantly both among species and among populations. Furthermore, female fish tended to eat 30-40% more food than males, probably to meet the larger energy requirement associated with egg production. A sensitivity analysis indicated that the Hg mass balance model was mostly responsive to variables that can be easily measured in the field, such as fish size and Hg concentration in fish and their food. By providing a low-effort approach to quantifying food consumption rates of fish in the field, this method may help to refine our understanding of the environmental factors that influence the quantity of food consumed by fish.

Erratum: Estimating food consumption rates of fish using a mercury mass balance model

2000 ◽  
Vol 57 (4) ◽  
pp. 871 ◽  
Author(s):  
Marc Trudel ◽  
Alain Tremblay ◽  
Roger Schetagne ◽  
Joseph B Rasmussen
Keyword(s):  
Mass Balance ◽  
Food Consumption ◽  
Balance Model ◽  
Mass Balance Model ◽  
Consumption Rates

Urbanization impacts on production and recruitment of Fundulus heteroclitus in salt marsh creeks

2020 ◽  
Vol 645 ◽  
pp. 187-204
Author(s):  
PJ Rudershausen ◽  
JA Buckel
Keyword(s):  
Salt Marsh ◽  
Salt Marshes ◽  
Fundulus Heteroclitus ◽  
Multiple Factor Analysis ◽  
Southeastern Usa ◽  
Density Dependent ◽  
Dependent Relationship ◽  
Juvenile Abundance ◽  
The Relationship ◽  
Throw Trap

It is unclear how urbanization affects secondary biological production in estuaries in the southeastern USA. We estimated production of larval/juvenile Fundulus heteroclitus in salt marsh areas of North Carolina tidal creeks and tested for factors influencing production. F. heteroclitus were collected with a throw trap in salt marshes of 5 creeks subjected to a range of urbanization intensities. Multiple factor analysis (MFA) was used to reduce dimensionality of habitat and urbanization effects in the creeks and their watersheds. Production was then related to the first 2 dimensions of the MFA, month, and year. Lastly, we determined the relationship between creek-wide larval/juvenile production and abundance from spring and abundance of adults from autumn of the same year. Production in marsh (g m-2 d-1) varied between years and was negatively related to the MFA dimension that indexed salt marsh; higher rates of production were related to creeks with higher percentages of marsh. An asymptotic relationship was found between abundance of adults and creek-wide production of larvae/juveniles and an even stronger density-dependent relationship was found between abundance of adults and creek-wide larval/juvenile abundance. Results demonstrate (1) the ability of F. heteroclitus to maintain production within salt marsh in creeks with a lesser percentage of marsh as long as this habitat is not removed altogether and (2) a density-dependent link between age-0 production/abundance and subsequent adult recruitment. Given the relationship between production and marsh area, natural resource agencies should consider impacts of development on production when permitting construction in the southeastern USA.

Cereal Consumption, Production, and Prices in West Pakistan (Notes & Comments)

1968 ◽  
Vol 8 (2) ◽  
pp. 288-306 ◽  
Author(s):  
G. C. Hufbauer
Keyword(s):  
Food Consumption ◽  
Ad Hoc ◽  
Dry Weight ◽  
Small Sample ◽  
Tax Rates ◽  
Active Population ◽  
Early Settlement ◽  
Consumption Rates ◽  
Late Nineteenth ◽  
Better Than

In the late nineteenth and early twentieth centuries, several Punjab Settlement Officers attempted to estimate food consumption rates. These estimates, based on direct observation and ad hoc guesses, were made partly out of academic curiosity, but more urgently, as an aid in establishing the land revenue (i.e., tax) rates. The pre-1926 estimates are summarized in Table I, expressed in pounds of wheat and other foodgrain consumption per person per year1. Broadly speaking, the later, more systemtic observers (e.g., Sir Ganga Ram and C. B. Barry), found lower consumption levels than the earlier observers. It was generally accepted that the rural populace ate better than urban dwellers. Despite the ingenuity of the early Settlement Officers, their compiled estimates suffer from all the difficulties of haphazard small sample observation. Given the revenue purpose of the estimates, they may be biased towards the able-bodied, economically active, population. Further, the very early estimates may have confused dry weight with cooked weight, including water.

A generic model to estimate food consumption: linking von Bertalanffy’s growth model with Beverton and Holt’s and Ivlev’s concepts of net conversion efficiency

2009 ◽  
Vol 66 (4) ◽  
pp. 683-700 ◽  
Author(s):  
Axel Temming ◽  
Jens P. Herrmann
Keyword(s):  
Food Consumption ◽  
Growth Model ◽  
Conversion Efficiency ◽  
Gadus Morhua ◽  
Generic Model ◽  
Similar Degree ◽  
Growth Equation ◽  
Von Bertalanffy ◽  
Gastric Evacuation ◽  
Consumption Rates

In this paper, a mathematical derivation is presented that links von Bertalanffy’s growth model with the concept of net conversion efficiency of Beverton and Holt, aiming at the development of an equation that can calculate food consumption rates of wild populations from parameters of the von Bertalanffy growth equation and an estimate of the net food conversion efficiency of Beverton and Holt. The derivation is based on Pauly’s version of the generalized von Bertalanffy equation, which allows the allometric exponent of the anabolism term to differ from 2/3, as in the standard von Bertalanffy equation. As a side product, a general model is formulated that describes the gross growth conversion efficiency (K1 of Ivlev) as a function of weight of the organism. The new equations for the estimation of food consumption are applied in two case studies, North Sea cod ( Gadus morhua ) and whiting ( Merlangius merlangus ), for which a variety of consumption estimates is available from conventional gastric evacuation-based methods. The new method produces results that show a similar degree of variability as was observed in various applications of the gastric evacuation method.

Food consumption rates for use in generalised radiological dose assessments

1995 ◽  
Vol 15 (4) ◽  
pp. 335-341 ◽  
Author(s):  
J Byrom ◽  
C Robinson ◽  
J R Simmonds ◽  
B Walters ◽  
R R Taylor
Keyword(s):  
Food Consumption ◽  
Consumption Rates ◽  
Radiological Dose ◽  
Dose Assessments

Why are dwarf fish so small? An energetic analysis of polymorphism in lake whitefish (Coregonus clupeaformis)

2001 ◽  
Vol 58 (2) ◽  
pp. 394-405 ◽  
Author(s):  
Marc Trudel ◽  
Alain Tremblay ◽  
Roger Schetagne ◽  
Joseph B Rasmussen
Keyword(s):  
Life Span ◽  
Energy Budget ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Sympatric Populations ◽  
Subarctic Lakes ◽  
Lower Growth ◽  
Chemical Tracers ◽  
Mass Balance Models ◽  
Consumption Rates

Sympatric populations of dwarf lake whitefish (Coregonus clupeaformis) (DLW) and normal lake whitefish (NLW) commonly occur in north temperate and subarctic lakes. DLW have a much lower growth, mature earlier, and have a shorter life span than NLW. Furthermore, they are usually not found when cisco (Coregonus artedi) are present, possibly due to competitive exclusion. In this study, we compared the energy budget of DLW, NLW, and cisco using food consumption rates estimated with mass balance models of chemical tracers (i.e., mercury and radiocesium). These chemicals are globally distributed and can be readily detected in fish and their prey. Our analysis showed that the energy budget of DLW and cisco was similar. DLW and cisco consumed on average 40–50% more food than NLW. The conversion efficiency of DLW and cisco was two to three times lower than that of NLW. These results suggest that DLW and cisco allocated a larger fraction of their energy budget to metabolism than NLW. Our analysis also suggests that the earlier maturation and shorter life span of DLW and cisco may be due to their higher metabolic rates.

Error in Estimation of Feeding Rates from Changes in Mean Body Mass

1988 ◽  
Vol 45 (8) ◽  
pp. 1494-1498 ◽  
Author(s):  
P. A. Cochran ◽  
K. J. Knutsen
Keyword(s):  
Food Intake ◽  
Food Consumption ◽  
Body Mass ◽  
Micropterus Salmoides ◽  
Feeding Rates ◽  
Growth Data ◽  
Typical Application ◽  
Consumption Rates ◽  
Actual Field ◽  
Change In Mean

Because of nonlinear relationships between body mass and many parameters in energetics models, rates of food intake calculated from change in mean body mass (a typical application of energetics models) do not necessarily equal true mean rates of food intake calculated from individual changes in body mass. Using both hypothetical data and actual field data for largemouth bass (Micropterus salmoides) marked with individually numbered tags, we show that discrepancies increase with variability in body mass but are negligible (< 3.5%) in all cases examined. Biased estimates of change in mean body mass, such as might result from size-selective mortality or sampling gear, can lead to substantial errors in energetics model estimates of mean food consumption rates. Use of growth data for individually marked fish in conjunction with an energetics model permits calculation of confidence intervals, statistical comparison of food consumption rates, and examination of relationships between foraging success and individual body mass.

Evaluation of a Method for Estimating Food Consumption Rates of Fish

1973 ◽  
Vol 30 (5) ◽  
pp. 623-629 ◽  
Author(s):  
Robert F. Carline ◽  
James D. Hall
Keyword(s):  
Food Consumption ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Growth Efficiency ◽  
Behavior Patterns ◽  
Growth Data ◽  
Wide Range ◽  
Consumption Rates ◽  
Similar Growth ◽  
Experimental Stream

A method of estimating food consumption rates of fish in nature from laboratory growth data was evaluated using juvenile coho salmon (Oncorhynchus kisutch) in three similar experiments. One group of coho was held individually in aquariums where movement was restricted. Another group was maintained in an experimental stream where the coho displayed many of their typical behavior patterns. All fish were fed known rations and both groups had similar growth efficiencies over a wide range of rations. Coho feeding at intermediate rates had the highest gross efficiencies. Aggressive activity did not affect growth efficiency. Results suggested that laboratory food and growth data may provide reasonably accurate estimates of food consumption of coho salmon in nature.

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