Bettongia gaimardi

Rose, R. W.; Rose, Robert K.

doi:10.2307/3504399

Cited by 11 publications

(31 citation statements)

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“…Although the sexual maturation and the duration of the pregnancy are similar in these two species, their behaviors show differences (Miller 1910; Ross 1994, 1998; Kabuki et al 2008). Djungarian hamsters are tame, but Roborovskii hamsters show hyperactivity.…”

Section: Introductionmentioning

confidence: 99%

Metabolism of amino acids differs in the brains of Djungarian hamster (P. sungorus) and Roborovskii hamster (P. roborovskii)

et al. 2014

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Djungarian hamster (P. sungorus) and Roborovskii hamster (P. roborovskii) belong to the same genus of phodopus. Roborovskii hamster shows high locomotor activity and low level of dopamine (DA) in the brain. Administration of L-tyrosine, a precursor of DA, decreases locomotor activity in Roborovskii hamsters. However, the amino acid metabolism in relation to the hyperactivity is not yet well known. In the present study, L- and D-amino acid concentrations in the brain, liver, and plasma in Djungarian and Roborovskii hamsters were investigated during day and night times to explain the possible difference in hyperactivity between them. Most of the examined amino acids were higher in the night time when hamsters are active compared to those in day time. L- and D-tyrosine concentrations were higher in the liver of Roborovskii hamsters than in Djungarian hamsters. Furthermore, brain concentration of D-tyrosine was higher in the Roborovskii than in Djungarian hamsters, but no significant difference was observed for L-tyrosine concentrations between the two species. These results suggest that the conversion of L-tyrosine to D-tyrosine in the brain of Roborovskii hamster may be higher than in Djungarian hamster, which may cause low DA concentration and hyperactivity in Roborovskii hamster. On the other hand, L- and D-serine, which are known as sedative factors, were lower in Roborovskii hamsters than Djungarian hamster. These results suggest that species-specific regulation in amino acid metabolism may contribute to hyperactivity in Roborovskii hamsters.

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Section: Introductionmentioning

confidence: 99%

Metabolism of amino acids differs in the brains of Djungarian hamster (P. sungorus) and Roborovskii hamster (P. roborovskii)

et al. 2014

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“…The eastern bettong (Bettongia gaimardi, Desmarest 1822) and the long-nosed potoroo (Potorous tridactylus, Kerr 1792) are nocturnal marsupials, historically restricted to temperate eastern Australia and Tasmania (Rose and Rose 1998;Trent 2015;Frankham et al 2016). Although two subspecies are recognised for B. gaimardi, only the Tasmanian subspecies remains extant (Rose and Rose 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Three subspecies are recognised for P. tridactylus, two on mainland Australia and one in Tasmania, the latter of which occurs in two genetically distinct populations (Frankham et al 2016). B. gaimardi and P. tridactylus average 1.6-1.8 kg and 0.6-1.64 kg respectively (Rose and Rose 1998;Johnston 2010, p. 95). Sexual dimorphism is pronounced only in P. tridactylus, with males larger than females (Norton et al 2010a).…”

Section: Introductionmentioning

confidence: 99%

“…Bettongia gaimardi and P. tridactylus share a largely mycophagous diet. Although non-fungal elements such as seeds, insects, foliage and tree sap may be included in the diet, this material is taken less frequently, or to supplement the diet in times of scarcity (Taylor 1992;Johnson 1994d;Tory et al 1997;Rose and Rose 1998). Most of the diet is made up by the fruiting bodies (hereafter truffles) of ectomycorrhizal fungi, especially those associated with eucalypts, such as the Mesophelliaceae (Claridge et al 1992(Claridge et al , 1993Johnson 1994c;Tory et al 1997;Andren et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Most of the diet is made up by the fruiting bodies (hereafter truffles) of ectomycorrhizal fungi, especially those associated with eucalypts, such as the Mesophelliaceae (Claridge et al 1992(Claridge et al , 1993Johnson 1994c;Tory et al 1997;Andren et al 2018). This dietary preference is supported by a well-developed olfactory sense, used to locate truffles, and forelimbs adapted to digging (Donaldson and Stoddart 1994;Rose and Rose 1998;Vernes and Jarman 2014). In addition, the enlarged foregut of B. gaimardi may be specifically adapted to optimise digestion of truffles, which are otherwise nutritionally deficient (Rose and Rose 1998).…”

Section: Introductionmentioning

confidence: 99%

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Identifying important environmental variables in the niche partitioning of two keystone ecosystem engineers (Bettongia gaimardi and Potorous tridactylus) in Tasmania

Standaloft

Kirkpatrick

2022

Wildlife Res.

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Context. The eastern bettong (Bettongia gaimardi) and the long-nosed potoroo (Potorous tridactylus) are mycophagous marsupials regarded as both keystone species and ecosystem engineers. Despite Tasmania being a refuge for these declining species, their niche partitioning is poorly understood. Aims. Our aim was to identify factors that distinguish the distributions of B. gaimardi and P. tridactylus, and to develop a better explanation of their individual niches. Methods. The Department of Primary Industries, Parks, Water and Environment conducted mammal surveys between 1975 and 2019. We used GIS to analyse these data, and geospatial information to identify relationships between B. gaimardi and P. tridactylus presence/absence and environmental variables. We then developed a model describing the distributions of these species in Tasmania. Key results. Temperature seasonality (s.d. × 100), precipitation of wettest month (mm), precipitation of the driest month (mm), precipitation seasonality (coefficient of variation), the presence of vegetation dominated by Eucalyptus amygdalina and the presence of lowland grassy woodland/forest were the components in the best model for B. gaimardi. Our model broadly predicts that the distribution of B. gaimardi is restricted to the more fertile eastern half of Tasmania. P. tridactylus was associated with very few variables, with the presence of E. amygdalina-Eucalyptus obliqua damp forest being the only component in a very weak model. Transects with P. tridactylus and not B. gaimardi were more associated with rainforest and wet forest communities and areas of higher annual and wettest-month precipitation than were those with B. gaimardi and not P. tridactylus. Conclusions. The importance of infertile sites to B. gaimardi may have been overstated in the literature, with moderate to high fertility being more characteristic of its range. B. gaimardi is adapted to persist in environments of low truffle (food) density, typical of the eastern half of Tasmania, through its ability to adopt a larger home range than for P. tridactylus, which requires dense ground vegetation. Implications. Sites of high fertility in fragmented landscapes should be considered to be potential habitat for B. gaimardi. This challenges previous assumptions that infertile sites are the primary habitat of the species, with fertile sites offering poorer-quality habitat.

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In uniparental Phodopus sungorus, new mothers, and fathers present during the birth of their offspring, are the only hamsters that readily consume fresh placenta

Gregg

Wynne‐Edwards

2006

Developmental Psychobiology

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Placentophagia is common among parturient female mammals but non-parturient females generally refuse placenta. Biparental male dwarf hamsters (Phodopus campbelli) readily consume placenta. The present study quantified placentophagia and liver acceptance in the closely related Siberian hamster P. sungorus in which males do not participate in the birth and are not responsive to a displaced pup. Sexually naïve P. sungorus males and females refused both placenta and liver (all groups <10%). Reproductive females specifically consumed placenta on the day before (G17), and the day of, parturition (G18) (>80%). Males rejected both tissues on G17 and accepted placenta soon after the birth (G18) (80%) only if they were present during the birth. Palatability of the placenta was not responsible for the species difference as P. campbelli accepted P. sungorus placenta. Results are consistent with a neophobic reaction to both placenta (conspecific or heterospecific) and liver as P. sungorus also rejected P. campbelli placenta.

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Bettongia gaimardi

Cited by 11 publications

References 0 publications

Metabolism of amino acids differs in the brains of Djungarian hamster (P. sungorus) and Roborovskii hamster (P. roborovskii)

Metabolism of amino acids differs in the brains of Djungarian hamster (P. sungorus) and Roborovskii hamster (P. roborovskii)

Identifying important environmental variables in the niche partitioning of two keystone ecosystem engineers (Bettongia gaimardi and Potorous tridactylus) in Tasmania

In uniparental Phodopus sungorus, new mothers, and fathers present during the birth of their offspring, are the only hamsters that readily consume fresh placenta

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