Energy budget

Energy budget

An energy budget is a balance sheet of energy income against expenditure. It is studied in the field of Energetics which deals with the study of energy transfer and transformation from one form to another. Calorie is the basic unit of measurement. An organism in a laboratory experiments is an open thermodynamic system, exchanging energy with its surroundings in three ways-heat, work and the potential energy of biochemical compounds.

Fishes , like all organism, use ingested food resources (C) as building blocks in the synthesis of tissues (P=production) and as fuel in the metabolic process that power this synthesis and other physiological process (R). Some of the resources are lost as waste products (F). All these aspects of metabolism can be represented in energy units. Fact|date=April 2007The basic model of energy budget may be shown as:

P = C - R - U - F or

P = C - (R + U + F) or

C = P + R + U + F

All the aspects of metabolism can be represented in energy units. (e.g. joules (J);1 food calorie = 4.2 kJ).Energy used for metabolism will be

R = C - (F + U + P)

Energy used in the maintenance will be

R + F + U = C - P

The compilation of energy budget for fish has a fairly short history, with the result that literature on the subject is limited. Fact|date=April 2007

References

* Kumar, Ranjan (1999) : Studies on Bioenergics modelling in a fresh water fish, Mystus vittatus (Bloch), Ph.D thesis, Magadh University, Bodh Gaya.

* B.R. Braaten.(1976): Bioenergetics-a review on Methodology In Halver J,E and K. Tiews (eds). Finfish nutrition and Finfish Technology vol. II, pp. 461-504. Berlin, Hennemann.

* Brett, J.R(1962). And T.D.D. Groves (1979). Physiological energetics. In W.S. Hoar, D.J. Randall & J.R. Brett(eds). In : Fish Physiology, Vol VII. PP.279-352. N.Y,; A.P.

* Cui, Y and R.J. Wootton (1988) : Bioenergetics of growth of a cyprinid Phoxinus phoxinus : the effect of ration, temperature, and body size on food consumption, faecal and nitrogen excretion. J.Fish. Biol, 33 : 431-443

* Elliott, J.M. and L.Persson (1978) : The estimation of daily rate of food consumption for fish. J. Anim. Ecol. 47,977.

* Fischer, Z (1983) : The elements of energy of energy balance in grass carp ( Ctenophayngodon idella) part-IV, consumption rate of grass carp fed on different types of food.

* Kerr, S.R.(1982) Estimating the energy budgets of actively predatory fish. Can. J.Fish Aqual. Sci, 39-371

* Kleiber, M. (1961) The fire of life- An Introduction to animal Energetics. Wiley, Newyork

* Prabhakar, A.K. (1997) : Studies on energy budget in a siluroid fish, Heteropneustes fossilis (Bloch), Ph.D thesis, Magadh University, Bodh Gaya.

* Ray, A.K and B.C. Patra (1987) : Method for collecting fish faeces for studying the digestibility of feeds J. Inland. Fish Soc. India. 19 (I) 71-73

* Sengupta, A. and Amitta Moitra (1996) : Energy Budget in relation to various dietary conditions in snake headed murrel, Channa punctatus : Proc. 83rd ISCA : ABS No. 95 : pp. 56

* Staples, D.J. and M.Nomura (1976) : Influence of body size and food ration on the energy budget of rainbow trout, Salmo gairdneri (Rechardson). J. Fish Biol. 9, 29.

* Von Bertalanfly, L. (1957) : Quantitative law in Metabolism. Quartz. Rev. biol. 32 : 217-231

* Warren, C.E.and G.E. Davies (1967) : Laboratory studies on the feeding bioenergetics and growth of fish. In : Gerking, S.D. (eds). The biological basis for freshwater Fish Production. Pp. 175-214. Oxford, Blackwell.


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Energy budget —   A requirement in the Building Energy Efficiency Standards that a proposed building be designed to consume no more than a specified number of British thermal units (Btus) per year per square foot of conditioned floor area.   California Energy… …   Energy terms

  • energy budget — energijos balansas statusas T sritis ekologija ir aplinkotyra apibrėžtis Materialinis balansas, kuriuo apibūdinama energijos išteklių ir energijos rūšių gavimo šaltiniai ir vartojimas. Jis parodo energijos išteklių sunaudojimą elektros energijos… …   Ekologijos terminų aiškinamasis žodynas

  • energy budget — noun : an accounting of the income, use, and loss of energy especially in an ecosystem the sun s contribution to the energy budget of the earth M.K.Hubbert …   Useful english dictionary

  • energy budget —   for the Earth, the net balance between insolation and outgoing radiation. The net gain of the surface and net loss of the atmosphere keeps energy transferring from the former to the latter by conduction, radiation and latent heat (vertical… …   Geography glossary

  • Earth's energy budget — [ thumb|right|250px|A schematic representation of the energy exchanges between the EarthEarth s atmosphere, and outer space. Note that the total energy entering each level is equal to the energy leaving that level as should be expected for a… …   Wikipedia

  • Dynamic energy budget — The Dynamic Energy Budget (DEB) theory aims to identify simple quantitative rules for the organization of metabolism of individual organisms that can be understood from basic first principles. The word dynamic refers to the life cycle perspective …   Wikipedia

  • Energy balance — has the following meanings in several fields:* In physics, energy balance is a systematic presentation of energy flows and transformations in a system. Theoretical basis for an energy balance is the first law of thermodynamics according to which… …   Wikipedia

  • Energy — This article is about the scalar physical quantity. For other uses, see Energy (disambiguation). Energetic redirects here. For other uses, see Energetic (disambiguation) …   Wikipedia

  • energy balance — energijos balansas statusas T sritis ekologija ir aplinkotyra apibrėžtis Materialinis balansas, kuriuo apibūdinama energijos išteklių ir energijos rūšių gavimo šaltiniai ir vartojimas. Jis parodo energijos išteklių sunaudojimą elektros energijos… …   Ekologijos terminų aiškinamasis žodynas

  • Energy Policy Act of 2005 — Enacted by the 109th United States Congress Citations Public Law …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”