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The weakly electric fish from the main channel of the Amazon river, Sternarchogiton nattereri, offers a striking case of morphological variation. Females and most males are toothless, or present only few minute teeth on the mandible, whereas some males exhibit exaggerated, spike-like teeth that project externally from the snout and chin. Androgens are known(More)
The gross morphology of the gas bladder is described and illustrated for representatives of most species and all valid genera of the Auchenipteridae (Siluriformes). Although, a simple cordiform gas bladder is present in some species of the family, others are characterized by their distinctive gas-bladder shape and diverticula disposition. An acute posterior(More)
The adult West African on intravenous fluid therapy requires 130 mmol of sodium, 50 mmol of potassium and 3L of water daily. At least 100g of glucose is usually provided. Three liters of Badoe's Maintenance Solution which contains 43.3 mmol of sodium of sodium, 16 mmol of potassium, 0.65 mmol of calcium, 9 mmol of bicarbonate, 51.7 mmol of chloride and 100g(More)
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