SOCIAL RANK AND PHYSIOLOGICAL TRAITS OF DAIRY-COWS AS INFLUENCED BY CHANGING GROUP MEMBERSHIP

被引:64
作者
ARAVE, CW [1 ]
ALBRIGHT, JL [1 ]
机构
[1] PURDUE UNIV, DEPT ANIM SCI, W LAFAYETTE, IN 47907 USA
关键词
D O I
10.3168/jds.S0022-0302(76)84306-8
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Social behavior was observed in 2 groups of 17 cows during 13 wk to determine dominance rank. On the basis of dominance ranking during 2 biweekly intervals (wk 3 and 4, 7 and 8), 6 cows were exchanged between groups (2 during the 1st and 4 during the 2nd exchange). The effect on milk yield, milk leukocyte concentration and milk prolactin of dominance rank and introduction of "strange" cows into a group was studied. Dominance rank was greater for older, heavier, taller cows in a later stage of lactation. Fat-corrected-milk yield was greater for dominant cows but milk prolactin was lower. Dominance rank for cows moved to a new group did not change appreciably. Persistency of milk yield was associated negatively with dominance rank for 5 of 6 exchanged cows. Since the average persistency of milk yield for all cows dropped 5% from wk 7-8, it appears exchange of cows between groups affected both exchanged and nonexchanged cows in a random manner. Neither dominance rank nor exchanging cows between groups had a significant effect on leukocyte concentrations in milk. Milk-prolactin concentrations were most highly correlated with dominance rank, stage of lactation, body weight and height at withers.
引用
收藏
页码:974 / 981
页数:8
相关论文
共 25 条
[1]  
[Anonymous], DOMESTICATED ANIMALS
[2]   BEHAVIOR, MILK-YIELD, AND LEUKOCYTES OF DAIRY-COWS IN REDUCED SPACE AND ISOLATION [J].
ARAVE, CW ;
ALBRIGHT, JL ;
SINCLAIR, CL .
JOURNAL OF DAIRY SCIENCE, 1974, 57 (12) :1497-1501
[3]  
BARTON E P, 1974, Proceedings of the Indiana Academy of Science, V83, P473
[4]  
BEILHARZ R. G., 1963, ANIMAL BEHAVIOUR, V11, P522, DOI 10.1016/0003-3472(63)90273-2
[5]  
BRIGHAM AA, 1901, 80 RHOD ISL AGR EXP
[6]   PATTERNS OF PITUITARY RELEASE AND CRANIAL OUTPUT OF LH AND PROLACTIN IN OVARIECTOMIZED EWES [J].
BUTLER, WR ;
BOLT, DJ ;
WILLETT, LB ;
MALVEN, PV .
ENDOCRINOLOGY, 1972, 91 (03) :793-+
[7]  
GROSVENO.CE, 1971, J DAIRY SCI, V54, P769
[8]  
GUHL A. M., 1959, TRANS KANSAS ACAD SCI, V62, P80, DOI 10.2307/3626512
[9]  
GUHL AM, 1953, 73 KANS AGR EXP STA
[10]  
HOOK SL, 1965, AM ZOOL, V5, P714