| mechanism and rate of glucose absorption differ between an australian honeyeater (meliphagidae) and a lorikeet (loriidae). | efficient mechanisms of glucose absorption are necessary for volant animals as a means of reducing mass during flight: they speed up gut transit time and require smaller volume and mass of gut tissue. one mechanism that may be important is absorption via paracellular (non-mediated) pathways. this may be particularly true for nectarivorous species which encounter large quantities of sugar in their natural diet. we investigated the extent of mediated and non-mediated glucose absorption in red watt ... | 2008 | 18978218 |
| morphological and molecular characterization of eimeria labbeana-like (apicomplexa:eimeriidae) in a domestic pigeon (columba livia domestica, gmelin, 1789) in australia. | an eimeria species is described from a domestic pigeon (columba livia domestica). sporulated oocysts (n = 35) were subspherical, with a smooth bi-layered oocyst wall (1.0 μm thick). oocysts measured 20.2 × 16.1 (22.0-18.9 × 15.7-18.9) μm, oocyst length/width (l/w) ratio, 1.38. oocyst residuum and a polar granule were present. the micropyle was absent. sporocysts are elongate-ovoid, 13.0 × 6.1 (14.5-12.5 × 5.5-7.0) μm, sporocyst l/w ratio, 2.13 (2.0-2.2), sporocyst residuum was present, composed ... | 2016 | 27080159 |
| sugar preferences of avian nectarivores are correlated with intestinal sucrase activity. | nectar-feeding birds generally demonstrate preference for hexose solutions at low sugar concentrations, switching to sucrose/no preference at higher concentrations. species vary in the concentration at which the switch from hexose preference occurs; this could reflect physiological constraints that would also influence nectar selection when foraging. we recorded concentration-dependent sugar type preferences in three opportunistic/generalist australian nectarivorous species: dicaeum hirundinaceu ... | 2013 | 23995481 |
| isospora anthochaerae n. sp. (apicomplexa: eimeriidae) from a red wattlebird (anthochaera carunculata) (passeriformes: meliphagidae) in western australia. | a new species, isospora anthochaerae n. sp. is described from a red wattlebird (anthochaera carunculata). sporulated oocysts (n=37) are subspherical, with smooth colourless to pale brown bilayered oocyst wall, 0.8 μm thick (outer layer 0·6 μm, inner 0.2 μm thick). oocyst with 2 spheroidal to subspheroidal sporocysts. oocyst length, 23.4 μm (20.0-26.0); oocyst width, 20.7 μm (19.0-22.0); oocyst length/width (l/w) ratio, 1.1. micropyle, oocyst residuum and polar granule are absent. sporocysts with ... | 2014 | 24602873 |
| regulation of water and sodium balance in the field by australian honeyeaters (aves: meliphagidae). | we evaluated the use of water and sodium by free-living individuals of several species of australian honeyeaters (acanthorhynchos superciliosus, phylidonyris novaehollandiae, phylidonyris nigra, manorina flavigula, and anthochaera carunculata). water and na fluxes were highly variable between species, largely reflecting differences in diet. water fluxes ranged from approximately 300% of total body water per day in 10-g, nectarivorous a. superciliosus to approximately 45% of total body water per ... | 2013 | 9548654 |
| isospora serinuse n. sp. (apicomplexa: eimeriidae) from a domestic canary (serinus canaria forma domestica) (passeriformes: fringillidae) in western australia. | a new species, isospora serinuse n. sp., (apicomplexa:eimeriidae) is described from a single domestic canary (serinus canaria forma domestica) (subspecies s. c. domestica) in western australia. sporulated oocysts of isospora serinuse n. sp. are spherical or subspherical, 25.5 (24.4-27.0) × 23.5 (22.0-24.8) μm, with a shape index (length/width) of 1.09; and a smooth bilayered oocyst wall, 1.2 μm thick (outer layer 0.9 μm, inner 0.3 μm). a polar granule is present, but a micropyle and oocyst resid ... | 2015 | 26325434 |
| effects of nectar volume and concentration on sugar intake rates of australian honeyeaters (meliphagidae). | sugar intake rates of captive australian honeyeaters (meliphagidae) feeding at artificial flowers varied across species, and as a function of nectar volume and concentration within each species. red wattlebirds (anthochaera carunculata, 110 g), achieved higher intake rates than new holland honeyeaters (phylidonyris novaehollandiae, 20 g), and both achieved higher rates than eastern spinebills (acanthorhynchus tenuirostris, 10 g). these results reflect differences in bill and tongue dimensions as ... | 1990 | 22160117 |