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Ecology and conservation status of the brush-tailed rabbit-rat, Conilurus penicillatus

机译：梳尾兔鼠Conilurus penicillatus的生态和保护现状

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In this thesis I investigate the ecology of the threatened brush-tailed rabbit-rat Conilurus penicillatus, specifically including diet, movements and shelter sites, population dynamics, and habitat preference and use. I then use this information as a base from which to consider possible causes of decline and to provide advice for remedial management. This study was conducted primarily at two main sites, Cobourg Peninsula (with two sub-sites) and Kakadu National Park, with additional information gathered from the Tiwi Islands. The diet of C. penicillatus consists primarily of seed, particularly from perennial grasses. The mean home range size is 0.79 ha; whilst males had larger home ranges than females, there were no significant differences in home-range size among the sites or between seasons. Conilurus penicillatus denned primarily in fallen logs and in hollows of eucalypts and bloodwoods. Apparent survival probability for C. penicillatus varied noticeably over the study and was best described by a model that included main and interaction effects of sex, site and sampling occasion. Population densities at the three sites ranged from 0.35 to 7.1 individuals ha-1. Conilurus penicillatus reproduced during the dry season (May-October) and most juveniles also entered the population during this period. On the Tiwi Islands C. penicillatus was most likely to occur in tall eucalypt forest away from watercourses, where there was more bare ground and where fires had been less severe and/or less recent. The species remains common and widespread on Cobourg Peninsula and Tiwi Islands, but is very restricted within Kakadu National Park. In common with the habitat relationships on the Tiwi Islands, in the mainland study sites Conilurus penicillatus was most likely to occur in tall eucalypt forests, where there was less bare ground and less cover of annual grasses and where fires had been less severe. The most likely cause of decline is changes in fire regimes as a result of the loss of traditional Aboriginal fire management.
机译：在这篇论文中，我研究了濒临灭绝的刷尾兔鼠Conilurus penicillatus的生态，特别是饮食，运动和庇护所，种群动态以及栖息地的偏好和使用。然后，我将这些信息用作基础，从中考虑可能的下降原因并为补救管理提供建议。这项研究主要在两个主要地点进行，即科堡半岛（有两个子地点）和卡卡杜国家公园，并从提维群岛收集了更多信息。青霉的饮食主要由种子组成，尤其是多年生草。平均房屋面积为0.79公顷；尽管男性的居所范围比女性大，但地点之间或季节之间的居所范围没有显着差异。尖齿Conilurus penicillatus主要栖息在倒下的原木以及桉树和阔叶树木的凹陷处。在整个研究过程中，C。penicillatus的表观存活概率显着不同，并且最好用一个模型来描述，该模型包括性别，部位和采样时机的主要作用和相互作用。这三个地点的人口密度范围从0.35到7.1个人ha-1。在干燥季节（五月至十月）繁殖的青螺（Conilurus penicillatus），在此期间，大多数少年也进入了种群。在提维群岛，青松最有可能发生在远离水道的高大桉树林中，那里的裸露土地较多，火灾较轻和/或较新近发生。该物种在科堡半岛和提维群岛上仍然很普遍，分布广泛，但在卡卡杜国家公园内却非常受限制。与提维群岛上的栖息地关系相同，在大陆研究点中，Conilurus penicillatus最有可能出现在高大的桉树林中，那里裸露的土地较少，一年生草的覆盖率也较低，并且火灾较轻。下降的最可能原因是由于失去了传统的原住民火管理而导致的火势变化。

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    Firth Ronald Stuart Craig;

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  • 年度 2007
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