Lipid and Dry Weight of Bovine Seminal Plasma and Spermatozoa from First and Second Ejaculates

Abstract Mean values for various measurements on 26 ejaculates of bull semen were as follows: seminal plasma dry weight (DW) 96mg per ml; lipid 1.21% (dry weight basis), 1.16mg per ml: spermatozoa DW 24.3mg per ml, 19.3 μ g per 10 6 ; lipid 15.1%, 362mg per ml and 2.87 μ g per 10 6 . Values for whole semen from 27 paired first and second ejaculates were DW 112, 106mg per ml and 78, 126 μ g per 10 6 ; lipid 4.61, 3.41%, 5.12, 3.62mg per ml and 3.42, 3.86 μ g per 10 6 , respectively. Seminal plasma and spermatozoa from 12 first and second ejaculates were analyzed; seminal plasma contained 96, 94mg per ml DW; 1.21, 1.03% lipid; 1.16, 0.97mg lipid per ml; whereas spermatozoa contained 30, 25mg DW per ml; 19.4, 19.3 μ g DW per 10 6 ; 13.7, 14.6% lipid; 4.18, 3.68mg lipid per ml; 2.68 and 2.81 μ g lipid per 10 6 , respectively. Seminal plasma from first ejaculates contained a higher (P