The Biology and Culture of Tilapias
In cichlids, some attempts have been made to purify and characterize pituitary gonadotropins. Farmer and Papkoff (1977) obtained ...
THE ROLE OF THE GONADS In addition to the central role of gametogenesis the gonads possess com- plex endocrine properties which, ...
In female cichlids both histochemistry (Livni 1971; Yaron 1971) and ultrastructural morphology (Nicholls and Maple 1972) show th ...
brates both in immunological and biochemical characteristics (King and Millar 1979). Other experimental data in fish support the ...
would need very precise criteria to assess small variations in the intensity of gametogenesis to investigate this. I remember fo ...
Feeding, Digestion and Growth--Qualitative Considerations Department of Biological Sciences Michigan Technological University Ho ...
The Feeding Apparatus and Digestive Tract in Tilapias It is important to begin with consideration of the feeding apparatus and d ...
Plate 1. Jaw teeth of an 8 cm standard length Sarotherodon mossambicus from Lake Valencia, Venezuela. Plate 2. Teeth on the lowe ...
The Diet of ~n&a.s In common with early developmental stages of nearly all fishes, the larvae, fry and early juvenile tilapi ...
The characteristic diet of adult tilapias is plant matter and/or detritus of plant origin. Blue-green and green algae, diatoms, ...
The role of animal found in the diets of tilapias is, at present, an enigma. In some studies, animal remains are rare or absent ...
Gastric acid is similarly important in digestion of some eukaryotic cells. The efficiency of diatom digestion increases with low ...
Table 3. Effect of gastric acidon the food of Saro herodon mossambicus in Lake Valencia, Venezuela simulated in vifro (a% sample ...
(Figure 1). Digestion of protein is complete in the first quarter. This com- ponent of the diet is thought to be microbial prote ...
Dietary protein/energy ratio (mg/ kJ) Figure 2. Graphic description of the relationship between dietary proteinlenergy ratios an ...
1978), while others have utilized refractile indigenous components such as cellulose for macrophyte grazers (Buddington 1979; Bu ...
C Table 4. Assimilation efficiency (AE%) estimates for tilapias feeding on natural diets. t4 VI Species Component Experimental d ...
To describe food quality, protein levels are frequently expressed as mg assimilable protein per kJ assimilable food energy. This ...
adults do not feed in the shallows are discussed elsewhere (Bowen 197613; Bruton 1979). With regard to the food quality problem, ...
Littoral floor slope Figure 5. Relationship between organic content, protein content, total amino acid con- tent and assimilable ...
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