The Biology and Culture of Tilapias
Summary and Conclusions The characteristic diet of adult tilapias is a mixture of algae, detritus, bacteria, and, in some cases, ...
Feeding, Metabolism and Growth of Tilapias: Some Quantitative Considerations M. S. CAULTON King Prawns (Put.) Ltd. P. 0. Box 135 ...
related environmental requirements. The principal environmental factor influencing physiology, i.e., temperature, will be the th ...
magnitude may initially appear extraordinarily high, but they are not uncommon in the shallow marginal waters of tropical and eq ...
inshore movement of juvenile fish continues throughout the morning and eventually large schools of juveniles are found in shallo ...
by definition can be described as the energy required by an unfed fish exhibiting spontaneous rather than directed movement. Suc ...
of T. rendalli and S. mossambicus is compared. Unlike S. mossambicus, T. rendalli shows an unexpected three-phase energy demand ...
The mass of all major body constituents, with the exception of the inorganic compounds, must, by definition, decrease with a dec ...
Relative condition factor Figure 5. The energy production ratio of fats and proteins during change in relative con- dition facto ...
the trial period 11.7 kJ of energy was released to sustain routine meta- bolism. From the information given in Figure 5, a fish ...
Table 1. Comparison of measured and estimated change in mass during starvation of Tilapia rendalli at six experimental temperatu ...
Time of day (hr) Figure 7. The daily feeding cycle of Tilapia rendalli in Lake McIlwaine, Zimbabwe (a, 1.9.75; b, 30.10.75). Tem ...
It is well known that many species of fish, especially the tilapias, will regulate their food intake in confined captivity. Thus ...
the feces recovered from a given meal of C. demersum varies from 4% to 15% less than that consumed, but this removal of minerals ...
irrespective of the amount of ingested energy. As previously shown from results of experiments to determine assimilation efficie ...
Excretory products, predominantly in the form of ammonia, are largely derived as a by-product of protein dearnination and as suc ...
protein or glycogen, which together represents the energy of growth or productivity (AB). Thus, the basic equation can be given ...
Table 6. Theoretical growth (AB) equations to describe the growth potential of young Tilapia rendalli at various temperatures. A ...
A similar fish subjected to a 12-hour daytime temperature of 30°C and with a nocturnal non-feeding temperature of 18°C would, in ...
showed stunting and poor growth. These fish were generally located close to the 'eye' of the spring (35" C) at night (response t ...
«
4
5
6
7
8
9
10
11
12
13
»
Free download pdf