Immature Goats Research Articles

Characterization of fatty acids in the sebum of goats according to sex and age.

Fatty acids in the sebum of goats were analyzed. 4-Ethyl fatty acids were the major components in mature males, while iso-, anteiso-, and normal fatty acids were the major ones in females. Normal fatty acids predominated in the sebum of immature goats of both sexes. There was no significant difference in the constituents between Saanen and Japanese native breeds.

Positive end expiratory pressure (PEEP) and right to left shunting in immature goats.

Immature fetal goats were exteriorized by caesarean section and catheters were placed in a pulmonary vein (PV), carotid artery (CA), femoral artery (FA), and the main pulmonary artery (PA). The goats were ventilated at 7.5 and 15 cm H20 positive end expiratory pressure (PEEP) between control periods at 0 PEEP. Right to left shunting (Qs/Qt) was calculated for three anatomic sites: lung, foramen ovale, and ductus arteriosus, and for two summation shunts: preductal and total. Total Qs/Qt increased in 8 of 14 animals at 7.5 cm H2O PEEP and in 7 of 12 animals at 15 cm H2O PEEP. Intrapulmonary shunting increased in only one experiment. The increase in total Qs/Qt resulted from elevated extrapulmonary shunting, always including the ductus arteriosus. The variation in response to PEEP was from animal to animal and not from one level to another within one animal. Changes in total Qs/Qt on PEEP did not correlate with the size of control Qs/Qt at any site.

Studies on goat nutrition Part I. Minimum protein requirement of goats for maintenance-endogenous urinary nitrogen and metabolic faecal nitrogen excretion studies

1. EUN and MFN excretions have been determined in goats on a N-low ration and also on a N-free ration. The values obtained were,EUN = 0·052 g./kg. live weight andMFN = 0·41 g./100 g. dry-matter feed intake.2. The values so determined with the two feeding regimens, for both the EUN and MFN agreed very closely.3. The minimum protein requirement of goats for maintenance, as calculated from the EUN value, is 0·65 lb./1000 lb. live weight.4. The formula for calculating the utilizable protein requirement for this species is found to be P = 0·89. W0.734, and is almost identical with the one given by Mitchell.5. The usefulness of the above formula in predicting the EUN of immature goats is discussed.