Lagorchestes Conspicillatus Research Articles

Cholangitis associated with species of Progamotaenia (Cestoda: Anoplocephalidae) in the bile ducts of marsupials.

Gross and histopathologic changes due to infection with Progamotaenia festiva and P. effigia in the bile ducts of the marsupials, Macropus rufus, M. giganteus, M. fuliginosus, Lagorchestes conspicillatus, Vombatus ursinus and Lasiorhinus latifrons are described. The integrity of the bile duct mucosa was not impaired but varying degrees of hyperplasia and hypertrophy of mucosa and mucosal glands, inflammatory infiltration and fibrosis were found. Portal fibrosis was the prominent reaction in Lasiorhinus latifrons. Reduced prevalence of cestode infection was recorded in two populations of M. giganteus in which Fasciola hepatica also was recovered.

Energy Metabolism and Thermoregulation of the Spectacled Hare Wallaby (Lagorchestes conspicillatus)

Spectacled hare wallabies (Lagorchestes conspicillatus) have a basal metabolic rate (0.32 cm³ O₂·g⁻¹·h⁻¹) that is about 70% of the value that would be anticipated for most eutherian mammals of corresponding size (2.66 kg). The body temperature and heart rate of these marsupials are also relatively low by eutherian standards. Lagorchestes regulates its body temperature well in environments as cool as 6 C, relying on augmented heat production and heat conservation resulting from effective insulation and peripheral heterothermy involving the tail and distal portion of the limbs. The minimal heat-transfer coefficient for this wallaby is 1.1 kcal (m²·h· C)⁻¹, a value similar to those reported for other macropodids. Hare wallabies cope with heat stress by a combination of controlled hyperthermia and evaporative cooling. The latter involves panting; breathing rates exceeding 400 cycles/min were noted in individuals tested in environments at 43 C. Panting resulted in a slight increase in blood pH after 2-4 h. Licking behavior also appears to contribute to evaporative water output at high temperatures. Cutaneous water loss is not an important component of this output, at least in the resting animals utilized in this study. Hare wallabies are nocturnal in nature and spend the day protected from solar radiation and high air temperatures within shelter provided by porcupine grass (Triodia angusta). Behavior thus serves to minimize requirements for evaporative output of water on hot days. The physiological performance of the hare wallaby is compared with that of the jackrabbit, an animal of similar size and ecology occupying North American deserts.

On Two New Species of Tapeworms from the Stomach and Small Intestine of a Wallaby, Lagorchestes conspicillatus, from Hermite Island, Monte Bello Islands. (1851 Exhibition Scholar)*

On Two New Species of Tapeworms from the Stomach and Small Intestine of a Wallaby, <i>Lagorchestes conspicillatus</i>, from Hermite Island, Monte Bello Islands. (1851 Exhibition Scholar)*