Changes in the group associations of free-ranging beef cows at calving

Dyadic association between individuals forms the basis of group structures for herding animals. Group associations and social bonds are dynamic and can result in the establishment of new subgroups. The onset of parturition and the introduction of an offspring create a social change for a mother that is part of a herd. There is a need to nurture the young, develop and maintain a strong maternal bond, and build or maintain social networks within the larger herd. The present study explored associations within a herd of cattle that included pregnant cows and cows with calves (maternal cows). Group dynamics were determined by daily observations of group associations over an 11-week period. During the period, some pregnant cows calved and it was possible to quantify their associations before and post-calving. The associations between individual cows were quantified using a half-weight index (HWI). The HWI data for the maternal and pregnant class of cows were compared. The overall HWI data and the individual class data (pregnant or maternal) were tested against a random model, using data that were generated using permutation methods. There were significant differences in the associations of the pregnant and maternal cows; the maternal cows had stronger associations with other maternal cows while the pregnant cows showed evidence of weaker associations with other pregnant cows and the maternal cows. As pregnant cows calved, they developed stronger associations with other maternal cows. The present study provided evidence that pregnant cows prefer to maintain a degree of isolation, but strengthen their social bonds with other mothers as they enter a maternal phase.

[1]  L. Bejder,et al.  A method for testing association patterns of social animals , 1998, Animal Behaviour.

[2]  B. Sowell,et al.  Social behavior of grazing beef cattle: Implications for management , 2000 .

[3]  A. Boissy,et al.  Ontogeny of social awareness in domestic herbivores , 1998 .

[4]  C. Galina,et al.  The detection of estrus in cattle raised under tropical conditions: What we know and what we need to know , 2007, Hormones and Behavior.

[5]  D. Weary,et al.  Maternal behavior in cattle , 2007, Hormones and Behavior.

[6]  Y. Nakanishi,et al.  Changes in Social and Spacing Behaviour of Japanese Black Cattle after Introducing a Strange Cow into a Stable Herd , 1991 .

[7]  D. Wood‐Gush,et al.  Observations on creche behaviour in suckler calves , 1987, Behavioural Processes.

[8]  Hal Whitehead,et al.  SOCPROG programs: analysing animal social structures , 2009, Behavioral Ecology and Sociobiology.

[9]  Linda J. Keeling,et al.  Spacing behaviour and an ethological approach to assessing optimum space allocations for groups of laying hens , 1995 .

[10]  L. Lidfors,et al.  Behaviour at calving and choice of calving place in cattle kept in different environments , 1994 .

[11]  Steven J. Schwager,et al.  A comparison of association indices , 1987, Animal Behaviour.

[12]  K. Lindström,et al.  Female characteristics and parental care mode in the crèching system of eiders, Somateria mollissima , 2001, Animal Behaviour.

[13]  G. J. Bishop-Hurley,et al.  Using contact logging devices to explore animal affiliations: Quantifying cow–calf interactions , 2007 .

[14]  Bryan F. J. Manly,et al.  A Note on the Analysis of Species Co‐Occurrences , 1995 .

[15]  Lena Lidfors,et al.  Behaviour of free-ranging beef cows and calves , 1988 .

[16]  M. Crowe,et al.  Effect of repeated regrouping and relocation on behaviour of steers , 2008 .

[17]  P. Pattison,et al.  Changes in temporal and spatial associations between pairs of cattle during the process of familiarisation. , 2010 .

[18]  Ilya R. Fischhoff,et al.  Network metrics reveal differences in social organization between two fission–fusion species, Grevy’s zebra and onager , 2007, Oecologia.

[19]  M. Hirata,et al.  Mother–young distance in Japanese Black cattle at pasture , 2003, Journal of Ethology.

[20]  Wendy C. H. Green.  Social influences on contact maintenance interactions of bison mothers and calves: group size and nearest-neighbour distance , 1992, Animal Behaviour.

[21]  Group Predator Defense by Mule Deer in Oregon , 1988 .

[22]  V. Reinhardt,et al.  Cohesive Relationships in a Cattle Herd (Bos Indicus) , 1981 .

[23]  H. Whitehead,et al.  Testing association patterns of social animals , 1999, Animal Behaviour.

[24]  C. Galina,et al.  Oestrous cycles, oestrus and ovulation of the zebu in the Mexican tropics , 1985, Veterinary Record.

[25]  B. Lyon,et al.  Cooperation, Conflict, and Crèching Behavior in Goldeneye Ducks , 1998, The American Naturalist.

[26]  M. Mendl,et al.  Living in groups: an evolutionary perspective , 2001 .

[27]  G. Seidel,et al.  Why do cows mount other cows , 1985 .

[28]  S. Kondo,et al.  Stabilization of social hierarchy in dairy cows , 1990 .

[29]  K. Ekvall.  Effects of social organization, age and aggressive behaviour on allosuckling in wild fallow deer , 1998, Animal Behaviour.

[30]  L. Keeling,et al.  Social Behaviour in Farm Animals , 2001 .

[31]  M. Blockey.  The Influence of Serving Capacity of Bulls on Herd Fertility1 , 1978 .

[32]  R. Nowak,et al.  Role of mother-young interactions in the survival of offspring in domestic mammals. , 2000, Reviews of reproduction.

[33]  L. Howery,et al.  Social and environmental factors influence cattle distribution on rangeland , 1998 .