| demographic response of snake-necked turtles correlates with indigenous harvest and feral pig predation in tropical northern australia. | species that mature late, experience high levels of survival and have long generation times are more vulnerable to chronic increases in mortality than species with higher fecundity and more rapid turnover of generations. many chelonians have low hatchling survival, slow growth, delayed sexual maturity and high subadult and adult survival. this constrains their ability to respond quickly to increases in adult mortality from harvesting or habitat alteration. in contrast, the northern snake-necked ... | 2007 | 17922720 |
| experimental evidence for density-dependent responses to mortality of snake-necked turtles. | density-dependent compensation has rarely been demonstrated in long-lived vertebrates in highly variable environments, such as the wet-dry tropics, where complex factors impact on vital rates. we used an experimental manipulation of population density in six replicated wild populations of the northern snake-necked turtle (chelodina rugosa). we show that this species can rebound rapidly following reductions in density, and so is resilient to harvest and predation by pigs. remarkably, in some popu ... | 2009 | 19037663 |
| aptorchis megacetabulus n. sp. (platyhelminthes: digenea) from the northern long-necked turtle, chelodina rugosa (pleurodira: chelidae), in australia. | aptorchis megacetabulus n. sp. is described from the intestine of the northern long-necked turtle, chelodina rugosa (pleurodira: chelidae), in northern territory, australia. this is the first helminth species reported from c. rugosa. this plagiorchioidean digenean differs from the 3 previously known species of aptorchis in the relative size of the ventral sucker, overall body proportions, nature of the cirrus sac, and egg size. comparison of approximately 2,700 bases of ribosomal dna obtained fr ... | 2007 | 17539426 |
| the complete mitochondrial genome sequences of chelodina rugosa and chelus fimbriata (pleurodira: chelidae): implications of a common absence of initiation sites (o(l)) in pleurodiran turtles. | within the order testudines, while phylogenetic analyses have been performed on the suborder cryptodira with complete mitochondrial genomes (mitogenomes), mitogenomic information from another important suborder pleurodira has been inadequate. in the present study, complete mitochondrial dna (mtdna) sequences of two chelid turtles chelodina rugosa and chelus fimbriata were firstly determined, the lengths of which were 16,582 and 16,661 bp respectively. as the typical vertebrate mitogenome, both m ... | 2012 | 21655955 |
| development of microsatellite markers in the australasian snake-necked turtle chelodina rugusa and cross-species amplification. | seventeen microsatellite loci were developed for the snake-necked turtle, chelodina rugosa (ogilby, 1890). sixteen of the loci were polymorphic but three of these loci had null alleles. one locus displayed linkage disequilibrium. these 17 markers were tested for amplification in eight congeneric species with varying success; 98% amplification in chelodina burrungandjii, 72% in c. canni, 38% in c. expansa, 58% in c. longicollis, 67% in c. mccordi, 73% in c. oblonga, 81% in c. parkeri, and 68% in ... | 2009 | 21564647 |
| osmotic balance in the eggs of the turtle chelodina rugosa during developmental arrest under water. | the tropical australian turtle chelodina rugosa normally lays its hard-shelled eggs in mud, under shallow freshwater, during the monsoon season. the eggs undergo developmental arrest until the water recedes and oxygen is able to diffuse into the embryo. this period of arrest can exceed 12 wk without embryonic mortality. to understand how the eggs avoid osmotic absorption of water leading to shell rupture and embryonic death, this study investigates the solute concentrations and volumes of the al ... | 2013 | 9231404 |
| the identity of chelodina oblonga gray 1841 (testudines: chelidae) reassessed. | the identity of chelodina oblonga has been unclear because it has been variously defined to include populations of snake-necked chelid turtle from the southwest of western australia, across northern australia, cape york and southern new guinea in its broadest conception, from just the northern part of this range (northern australia and new guinea), or restricted to the southwest corner of western australia in its narrowest conception. uncertainty over the identity of the type specimens has added ... | 2020 | 33055783 |