Temporal activity patterns of the swamp rat (Rattus lutreolus) and other rodents in north-eastern New South Wales, Australia

The activity patterns and partitioning of time by four small mammal species, with a focus on the swamp rat (Rattus lutreolus) in north-eastern New South Wales, was investigated using camera trap data from two studies. Analysis was carried out on 1079 camera trap events over 1530 camera trap–nights or 36 720 h of camera trap deployment in the field. The activity patterns of Rattus lutreolus were distinctly diurnal with crepuscular peaks of activity but this differed between sites and when in the presence of competitors. The Hastings River mouse (Pseudomys oralis) and the bush rat (Rattus fuscipes) displayed typical bimodal patterns of nocturnal activity. Antechinus were mostly nocturnal but were occasionally active during the day. These data indicate that where species of Muridae co-occur, diurnal time partitioning by R. lutreolus may reduce competition for food resources. It also confirms the speculation that R. lutreolus displays diurnal behaviour, albeit dependent on the presence of other murids.

[1]  Dc Cheal.  The Diets and Dietary Preferences of Rattus-Fuscipes and Rattus-Lutreolus at Walkerville in Victoria , 1987 .

[2]  D. Wood.  The ecology of Rattus fuscipes and Melomys cervinipes (Rodentia : Muridaae) in a south-east Queensland rain forest , 1971 .

[3]  P. Crowcroft,et al.  The daily cycle of activity in two species of Sminthopsis (Marsupialia: Dasyuridae). , 1968 .

[4]  P. Banks,et al.  Foraging behaviour and habitat use by Antechinus flavipes and Sminthopsis murina (Marsupialia: Dasyuridae) in response to predation risk in eucalypt woodland , 2004 .

[5]  P. Meek,et al.  Summer-Autumn home range and habitat use of the Hastings River mouse Pseudomys oralis (Rodentia: Muridae). , 2006 .

[6]  P. Banks,et al.  Competition in an invaded rodent community reveals black rats as a threat to native bush rats in littoral rainforest of south-eastern Australia. , 2009 .

[7]  T. Dayan,et al.  On the role of phylogeny in determining activity patterns of rodents , 2006, Evolutionary Ecology.

[8]  M. Kearney,et al.  Fine‐scale microhabitat selection for dense vegetation in a heathland rodent, Rattus lutreolus: Insights from intraspecific and temporal patterns , 2007 .

[9]  B. J. Fox,et al.  Interspecific competition: A mechanism for rodent succession after fire in wet heathland , 1993 .

[10]  D. Morris,et al.  Habitat‐dependent competition and the coexistence of Australian heathland rodents , 2000 .

[11]  M. Sale,et al.  Spatial and Temporal Organization in the Swamp Antechinus: Comparison Between Island and Mainland Populations , 2009 .

[12]  B. J. Fox,et al.  Habitat Selection by Female Rattus lutreolus Drives Asymmetric Competition and Coexistence with Pseudomys higginsi , 1999 .

[13]  K. Ashby.  Patterns of daily activity in mammals , 1972 .

[14]  O. Park.  Nocturnalism--The Development of a Problem , 1940 .

[15]  G. Körtner,et al.  Body temperature rhythms and activity in reproductive Antechinus (Marsupialia) , 1995, Physiology & Behavior.

[16]  B. J. Fox,et al.  A review of habitat selection by the swamp rat, Rattus lutreolus (Rodentia: Muridae) , 2007 .

[17]  M. Driessen,et al.  The projected distributions of Mastacomys fuscus and Rattus lutreolus in south-eastern Australia under a scenario of climate change: potential for increased competition? , 2008 .

[18]  G. H. Jacobs.  The Verriest Lecture 2009: Recent progress in understanding mammalian color vision , 2010, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[19]  H. Burda,et al.  Determinants of Daily Activity Patterns in a Free-living Afrotropical Solitary Subterranean Rodent , 2007 .

[20]  Lain L. MacDonald,et al.  Hidden Markov and Other Models for Discrete- valued Time Series , 1997 .

[21]  J. R. Bider,et al.  The Effects of Weather on the Activity of the Masked Shrew , 1974 .

[22]  Wendell E. Dodge,et al.  An Automatic Camera Device for Recording Wildlife Activity , 1960 .

[23]  T. Dayan,et al.  Partitioning of Time as an Ecological Resource , 2003 .

[24]  W. L. Vickery,et al.  The Influence of Weather on Rodent Activity , 1981 .