The effect of temperature on routine metabolism in <i>Tilapia rendalli</i> boulenger

Caulton, M. S.

doi:10.1111/j.1095-8649.1977.tb05711.x

Cited by 35 publications

(25 citation statements)

References 6 publications

(14 reference statements)

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“…The main cause of this discrepancy can be attributed largely to handling stress as invariably experiments conducted using closed respirometers do not allow fish to become habitat acclimated for sufficient time to overcome an initially high oxygen consumption due to handling (see Methods) . Farmer & Beamish (1969) and Caulton (1977) used constant flow respirometers to determine oxygen uptake for two allied species (T. nilotica and T. rendalli) and their findings compare more favourably with the results reported in this study [Table II(b)]. …”

Section: Discussionmentioning

confidence: 99%

The effect of temperature and mass on routine metabolism in Sarotherodon (Tilapia)mossambicus (Peters)

Caulton

1978

Journal of Fish Biology

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A reappraisal of oxygen uptake by Sarotherodon mossambicus was undertaken using a continuous flow respirometer. Measurements were obtained over the temperature range 16" C-37" C for fish weighing between 10 g and 150 g. Oxygen uptake was converted to energy equivalents (Q,,) using the value 13.68 J mg O,-l and the routine metabolic energy expenditure can be described by the equation E=0.0086 t2'0783 Mo'662 where E is the energy requirement for routine metabolism expressed in J h -l , t the temperature in "C and M the mass in g.

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Section: Discussionmentioning

confidence: 99%

The effect of temperature and mass on routine metabolism in Sarotherodon (Tilapia)mossambicus (Peters)

Caulton

1978

Journal of Fish Biology

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“…Recent work by Caulton (1976Caulton ( , 1977 on a related cichlid, Tilapia rendalli suggests that temperature may be the overriding factor dictating the movements and feeding cycles of tilapiines. He showed that ingestion rates and assimilation efficiencies are enhanced by warm temperatures, but the pattern of routine metabolism does not follow the general form expected of poikilotherms.…”

Section: General Discussion On the Role Of C L A M A S Gariepznus As Amentioning

confidence: 99%

The food and feeding behaviour of Clarias gariepinus (Pisces: Clariidae) in Lake Sibaya, South Africa, with emphasis on its role as a predator of cichlids

Bruton

1979

The Transactions of the Zoological Society of London

148

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The morphological and behavioural adaptations for feeding, and the food of C. gariepinus in Lake Sibaya are described. C. gariepinus is equipped to feed on a wide variety of food items, from minute crustaceans to fish. Predation is more efficient on invertebrate prey. Most feeding takes place at night on active benthic organisms, but they may also feed during the day and at the water surface. Individual bottom foraging is the normal mode of feeding although catfish may also feed in groups at the water surface. The advantages of social hunting are discussed.Food preferences are scored by three different methods and presented for the total catfish population and for different length groups, seasons, habitats and lake levels. Increasing lake levels during the study period resulted in a change in the relative density of three cichlid prey in the shallow water feeding area of C. gariepinus. The effect of changing cichlid densities on catfish predation was studied using field collections and experimental observations. C. guriepinus was found to feed on whichever cichlid prey was in greatest abundance, with some deviations which can be explained in terms of prey accessibility and other factors. An important aspect of their success as predators is their ability to switch from one prey to another as prey availability (= density + accessibility) changes.Predation by Clarias species on cichlids in Africa is reviewed, and the movements and interaction of C. gariepinus and three cichlid species in Lake Sibaya are described in detail. Catfish predation is discussed in terms of recent predation theory, and their role as predators of cichlids is tentatively postulated as three‐fold: to enhance species fitness by removing enfeebled individuals, i.e. to act as a “cleanser” to restrict the distribution of prey under certain conditions, i.e. to act as a “restrictor” to dampen fluctuations in prey abundance, i.e. to act as a “regulator”.The relative importance of these roles is unknown at this stage, and may change at different lake levels and in different ecosystems.

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“…Cho and Slinger (1980) showed that the maintenance energy requirements of rainbow trout increased with increasing temperatures. In several species of fish, the routine metabolic rate increases with temperature but only within a limited range of temperatures (Caulton 1977(Caulton , 1978Ott et al 1980). Caulton et aL (1977) distinguished three phases in the relation between oxygen uptake rates of titapia and water temperature with different Q~0 value at each range of temperature to which the fish were acclimatized.…”

Section: Intake and Requirementsmentioning

confidence: 99%

“…In several species of fish, the routine metabolic rate increases with temperature but only within a limited range of temperatures (Caulton 1977(Caulton , 1978Ott et al 1980). Caulton et aL (1977) distinguished three phases in the relation between oxygen uptake rates of titapia and water temperature with different Q~0 value at each range of temperature to which the fish were acclimatized. Differences between cyclic and constant temperatures are also noticed with respect to standard or routine metabolic rates (Dulthie and Houlihan 1982;Vondracek et aL 1982).…”

Section: Intake and Requirementsmentioning

confidence: 99%

Environmental effects on feed utilization

Kaushik

1986

Fish Physiol Biochem

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Both external and internal factors affect the response of fish to variations in dietary quantity and quality. An attempt is made to review major, recent studies on the series of intermediate steps (intake, digestion, metabolism, excretion and retention) involved in the global response of fish to environmental changes. Among these external factors, greater attention is however devoted to those that are the most important natural effectors within the aquatic environment: temperature, ambient oxygen and salinity. The changes brought about by a change in temperature at different levels of nutrient utilization have been studied to a great extent in the recent past. As temperature affects in the first instance, the voluntary food intake, a discussion on current nutrient requirement data should preferably be dealt with in absolute terms. While critical levels of oxygen below which growth is hindered are sufficiently defined for many species, precise data on the direct effects of oxygen deficiency on nutrient utilization are still fragmentory. With regard to salinity, a distinction between stenohaline and euryhaline species and a knowledge of the physiological mechanisms corresponding to their life cycles are required before attempting comparative analyses. Within euryhaline species, best performances are noted at salinities isotonic to the internal medium. Despite accumulating evidence on the effects of cyclical phenomena, the chronobiological approach to fish culture remains practically unexplored.

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The effect of temperature on routine metabolism in Tilapia rendalli boulenger

Cited by 35 publications

References 6 publications

The effect of temperature and mass on routine metabolism in Sarotherodon (Tilapia)mossambicus (Peters)

The effect of temperature and mass on routine metabolism in Sarotherodon (Tilapia)mossambicus (Peters)

The food and feeding behaviour of Clarias gariepinus (Pisces: Clariidae) in Lake Sibaya, South Africa, with emphasis on its role as a predator of cichlids

Environmental effects on feed utilization

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