Corrigendum to: Broad-scale environmental influences on the abundance of saltwater crocodiles (Crocodylus porosus) in Australia

2008 ◽  
Vol 35 (2) ◽  
pp. 170 ◽  
Author(s):  
Yusuke Fukuda ◽  
Peter Whitehead ◽  
Guy Boggs
Keyword(s):  
Environmental Influences ◽  
Strong Support ◽  
Northern Territory ◽  
The Other ◽  
Total Precipitation ◽  
Northern Australia ◽  
Landscape Modification ◽  
Geographical Variations ◽  
Crocodylus Porosus ◽  
Broad Scale

Saltwater crocodile (Crocodylus porosus) populations have recovered strongly across northern Australia over the 30 years since the species was protected from hunting. However, monitoring studies show large geographical variations in abundance across the Northern Territory, Queensland and Western Australia. The Northern Territory has considerably higher densities, raising questions about constraints on recovery in the other states. We examined broad-scale environmental influences on population abundance by modelling the species.environment relationships across northern Australia. The hypothesis-based models showed strong support for the linkage to (1) the ratio of total area of favourable wetland vegetation types (Melaleuca, grass and sedge to total catchment area, (2) a measure of rainfall seasonality, namely the ratio of total precipitation in the coldest quarter to total precipitation in the warmest quarter of a year, and (3) the mean temperature in the coldest quarter of a year. On the other hand, we were unable to show any clear negative association with landscape modification, as indicated by the extent of high-impact land uses or human population density in catchments. We conclude that geographical variations in crocodile density are mostly attributable to differences in habitat quality rather than the management regimes adopted in the respective jurisdictions.

Broad-scale environmental influences on the abundance of saltwater crocodiles (Crocodylus porosus) in Australia

2007 ◽  
Vol 34 (3) ◽  
pp. 167 ◽  
Author(s):  
Yusuke Fukuda ◽  
Peter Whitehead ◽  
Guy Boggs
Keyword(s):  
Environmental Influences ◽  
Strong Support ◽  
Northern Territory ◽  
The Other ◽  
Total Precipitation ◽  
Northern Australia ◽  
Landscape Modification ◽  
Geographical Variations ◽  
Crocodylus Porosus ◽  
Broad Scale

Saltwater crocodile (Crocodylus porosus) populations have recovered strongly across northern Australia over the 30 years since the species was protected from hunting. However, monitoring studies show large geographical variations in abundance across the Northern Territory, Queensland and Western Australia. The Northern Territory has considerably higher densities, raising questions about constraints on recovery in the other states. We examined broad-scale environmental influences on population abundance by modelling the species–environment relationships across northern Australia. The hypothesis-based models showed strong support for the linkage to (1) the ratio of total area of favourable wetland vegetation types (Melaleuca, grass and sedge) to total catchment area, (2) a measure of rainfall seasonality, namely the ratio of total precipitation in the coldest quarter to total precipitation in the warmest quarter of a year, and (3) the mean temperature in the coldest quarter of a year. On the other hand, we were unable to show any clear negative association with landscape modification, as indicated by the extent of high-impact land uses or human population density in catchments. We conclude that geographical variations in crocodile density are mostly attributable to differences in habitat quality rather than the management regimes adopted in the respective jurisdictions.

Studies in Australian Tettigoniidae: Australian agraeciine katydids, two new genera from northern Australia (Tettigoniidae; Conocephalinae; Agraeciini)

Zootaxa ◽  
2010 ◽  
Vol 2417 (1) ◽  
pp. 1
Author(s):  
D. C. F. RENTZ ◽  
YOU NING SU ◽  
NORIHIRO UESHIMA ◽  
MARTYN ROBINSON
Keyword(s):  
New Species ◽  
Northern Territory ◽  
The Other ◽  
New Genera ◽  
Northern Australia ◽  
Cytological Data ◽  
The Tropics

Two new agraeciine genera and five new species are described from northern Australia. Both genera have species that live in mixed woodlands in the tropics. Armadillagraecia Rentz, Su, Ueshima, Robinson gen. nov. is known from two species in the Northern Territory and one from Queensland. Kapalgagraecia Rentz, Su, Ueshima, Robinson gen. nov. is known from two species, one apparently widespread in the Northern Territory, the other from Groote Eylandt, NT. Cytological data are provided for all Armadillagraecia species but not for Kapalgagraecia. A table is presented documenting knowledge of the known cytology of all Agraeciini. The calling songs of both A. mataranka and A. yerilla Rentz, Su, Ueshima, Robinson gen. et spp. nov. are noted and documented by sonograms. Known biological, ecological and distributional data are presented.

The Foods and Feeding Habits of Subadult Crocodylus Porosus Schneider in Northern Australia.

1979 ◽  
Vol 6 (3) ◽  
pp. 347 ◽  
Author(s):  
JA Taylor
Keyword(s):  
Feeding Habits ◽  
Stomach Contents ◽  
Northern Territory ◽  
Northern Australia ◽  
Wet Season ◽  
Flood Plains ◽  
Significant Difference ◽  
Arnhem Land ◽  
Crocodylus Porosus ◽  
Slow Moving

Stomach contents were studied for 289 live young crocodiles (Crocodylus porosus) less than 180 cm long, collected from coast, river and swamp of Arnhem Land, Melville Island and Grant Island, Northern Territory, Australia; the crocodiles were then released. Tables give orders and families and some generic and specific names for prey or carrion eaten and for 3 parasites on the crocodiles, for a dry and a wet season in 1975-76. Between crocodiles 50 to 120 cm long and those smaller or larger there was no significant difference in the proportion of crocodiles having eaten crabs, shrimps, fish or insects or with empty stomachs, but only the larger crocodiles ate mammals or birds. Frequency of different foods eaten differed significantly with type of habitat or with salinity. Weight of food or incidence of empty stomachs did not differ between seasons, habitats or salinities. Condition of the crocodiles was significantly poorer for those from freshwater swamps than for those from lower mangrove or flood plains, and highest for those from upper mangrove. Main foods in both seasons were crustaceans, mainly crabs of subfamily Sesarminae and shrimps of genus Macrobrachium. The only fish eaten regularly was Pseudogobius sp., a slow-moving fish found by the water's edge. Amphibians were not found in the stomach.

The Languages of the Daly River Region (Northern Australia)

2017 ◽  
Author(s):  
Rachel Nordlinger
Keyword(s):  
Lexical Semantics ◽  
Northern Territory ◽  
The Other ◽  
Northern Australia ◽  
Verbal Morphology ◽  
Event Type ◽  
Linguistic Typology ◽  
Noun Incorporation ◽  
River Region

This chapter surveys the polysynthetic characteristics of the languages of the Daly River region of Australia’s Northern Territory. Although they are not all closely related, these languages share many typological features typical of polysynthesis, including the encoding of core arguments in the verbal word; noun incorporation; applicatives; and complex templatic verbal morphology. In addition the Daly languages exhibit complex verbal predicates composed of two discontinuous stems, one functioning broadly to classify the event type and the other providing more specific lexical semantics. These properties are surveyed across a range of Daly languages, considering both their similarities and their differences, and the implications they have for a cross-linguistic typology of polysynthesis.

Problem crocodiles, Crocodylus porosus, at Nhulunbuy, Northern Territory: an assessment of relocation as a mangaement strategy

1993 ◽  
Vol 20 (1) ◽  
pp. 127 ◽  
Author(s):  
B Walsh ◽  
PJ Whitehead
Keyword(s):  
Carrying Capacity ◽  
Northern Territory ◽  
Effective Strategy ◽  
Wet Season ◽  
Rates Of Return ◽  
Saltwater Crocodile ◽  
Crocodylus Porosus ◽  
Remote Sites ◽  
Total Capture ◽  
Capture Rates

Since 1986 the Conservation Commission of the Northern Territory has operated a programme to remove 'problem' saltwater crocodiles from waters in and adjoining the township of Nhulunbuy. Over a period of five years, 52 different saltwater crocodiles (44 male) were captured. Most (48) were released at remote sites designated by the traditional Aboriginal owners of the surrounding lands. Release distances from the township varied from 17 to 282 km (by coastline). Many crocodiles (47.9%), including those released at the most distant sites, returned to, and were subsequently recaptured at, the township. Total capture rates (initial captures and recaptures pooled) varied seasonally, with fewer crocodiles being caught in the cooler dry season. During the wet season capture rates remained high, but relatively fewer 'new' crocodiles were caught. Probability of recapture could not be related to distance and direction of release from the township, nor size and sex of the released crocodile. Frequency of capture of individual crocodiles (1-8 times) was also unrelated to these variables. The high rates of return indicate that relocation is unlikely to be an effective strategy for managing humancrocodile interactions, at least in areas where potential release sites already support saltwater crocodile populations near carrying capacity.

The Wilding of Cape York Peninsula

2017 ◽  
Author(s):  
Timothy Neale
Keyword(s):  
Indigenous Peoples ◽  
The Other ◽  
Northern Australia ◽  
Partial Failure ◽  
Hand Part ◽  
Cape York ◽  
The One ◽  
Colonial Encounters

In Chapter 1, I argue that ‘wildness’ is a product settler attempts to understand and thereby spatially remake the Northern Australia since the first colonial encounters in the 17th Century. For European explorers, a region like Cape York Peninsula was a wilderness to be surveyed, and through the misadventures and conflicts of inland expeditions it came to be understood as ‘wretched’ country populated with ‘treacherous’ peoples. Surveying subsequent uses of ‘the wild’ in this region, this chapter shows that if, on the one hand, part of the settler project has been to discursively and materially dictate the shape and texture of the region through such forms of wildness – ‘wilderness,’ ‘wild time,’ ‘wild blacks’ and ‘wild whites’ – then, on the other, the contemporary ‘wilderness’ should be understood not only as a product of the resistance and resilience of its Indigenous peoples, but also as the partial failure of this project.

Two Tonal Languages of New Guinea

1949 ◽  
Vol 13 (1) ◽  
pp. 184-199 ◽  
Author(s):  
A. Capell
Keyword(s):  
West Africa ◽  
Good Deal ◽  
New Guinea ◽  
The Other ◽  
Northern Australia ◽  
Western Africa ◽  
North Eastern ◽  
Semantic Value

WHILST the tonal languages spoken in West Africa have latterly received W a good deal of attention, it has not been generally realized that such languages are found also in parts of New Guinea. In New Guinea there are in fact two types of tonal languages. In one, the tones may be described as ” ornamental”, i.e. though they exist they do not seem to have semantic value, but rather to be connected with a certain type of sentence rhythm; in the other the tone systems are more definitely akin to those of Western Africa, and in such languages tones do possess semantic value. It is interesting that one at least of the latter group of languages tends also to be monosyllabic. It is hoped to provide a study of the former class of languages—at least one representative of which is also found in Northern Australia—at a later date. The present paper is occupied with the languages in which tones do have semantic value.These languages, so far as has been observed yet, are two in number, and they are spoken along the shores of Huon Gulf, in north-eastern New Guinea. The map on p. 186 will show their locations. Both belong to the group of languages known as Melanesian, and this makes the occurrence of tones even less expected. A considerable number of other languages are spoken round about this area, and though some of these also are Melanesian, they do not seem to have developed tones. Moreover, it would seem that the use of tones in these two languages antedates the coming of the Melanesian languages, for reasons that will be given towards the end of this paper.

Monitoring Crocodylus porosus populations in the Northern Territory of Australia: a retrospective power analysis

2001 ◽  
Vol 28 (6) ◽  
pp. 547 ◽  
Author(s):  
S. C. Stirrat ◽  
D. Lawson ◽  
W. J. Freeland ◽  
R. Morton
Keyword(s):  
Power Analysis ◽  
Northern Territory ◽  
Management Program ◽  
Survey Method ◽  
Management Information ◽  
River Systems ◽  
Pooled Data ◽  
Management Actions ◽  
Sampling Program ◽  
Crocodylus Porosus

In the Northern Territory of Australia, populations of the estuarine crocodile (Crocodylus porosus) have been subject to an annual egg harvest since the early 1980s. Since 1997, adult and juvenile crocodiles have also been harvested in some catchments. Annual surveys of crocodile populations are conducted in order to ensure that the harvest is sustainable. Boat surveys commenced in 1975 and helicopter surveys commenced in 1989. Retrospective power analysis was used to determine whether the sampling program meets the objectives of the Crocodile Management Program for the Northern Territory. Data collected during boat surveys vary in quality between river systems. The analysis of pooled data from 7 river systems with a residual standard deviation of 0.11 indicates that the power of the current spotlight survey method to detect a decline of 10% per annum in around 4 years is about 0.9. In this time the population would decline by around 33% and would fully recover in 8 years following the removal of the factor causing the decline. This allows detection of a decline within one-third, and recovery within two-thirds, of the estimated generation time of the saltwater crocodile and will allow management actions to be implemented before the impacts on populations are serious. The data from helicopter and boat surveys from a 10-year period were compared. Helicopter surveys did not provide useful management information.

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