↵​A Copro-parasitological Surveillance on Diverse Captive Wild Avian Species

Background: Infections with gastrointestinal parasites are widespread and a major health issue for captive birds. Despite the significance being well known, not much studies have been conducted on its prevalence especially in captive avians in a zoo setup. The present study aims at determining the prevalence of parasites in captive birds of different orders maintained at Bannerghatta Biological Park, Bengaluru, Karnataka. Methods: In this investigation, a survey through fecal sample examination was conducted to assess the parasitic infection in captive birds belonging to 6 different biological orders e.g. Casuariiformes, Anseriformes, Galliformes, Pelecaniformes, Psittaciformes {Emu (Dromaius novaehollandiae), Duck (Anas platyrhynchos), Peafowl (Pavo cristatus), red jungle fowl (Gallus gallus), grey pelican, (Pelecanus philippensis), purple heron (Ardea purpurea), silver pheasant (Lophura nycthemera), macaw (Ara ararauna), parakeet (Psittacula eupatsia)} and Ciconiiformes maintained at Bannerghatta Biological Park, Bengaluru, Karnataka. A total of 106 fecal samples from apparently healthy birds including 7 samples from emu, 3 ducks, 12 peafowls, 8 red jungle fowls, 24 grey pelicans, 1 purple heron, 13 silver pheasants, 8 macaws, 26 parakeets and 4 Indian open-billed storks were collected during 2015-2016 and were screened for parasitic eggs/oocysts. Result: The screening result could detect ova of 2 (28.57%) Eimeria oocyst in emu, 3 (100%) Eimeria oocyst in duck, 7 (58.33%) Capillaria sp., 3 (25%) Eimeria oocyst, 2 (16.66%) Ascardia galli, 2 (16.66%) Raillietina echinobothrida, 1 (8.33%) Tetrameres sp. in peafowls, 3 (37.5%) Ascardia galli, 1 (12.5%) Eimeria oocyst in red jungle fowls, 5 (20.83%) Ascardia galli in grey pelican, 1 (100%) trematode ova in purple heron, 3 (23.07%) Raillietina sp., 2 (15.38%) Eimeria ocyst in silver pheasant, 2 (25%) Ascaris sp. in macaw, 12 (46.15%) Ascaris sp., 3 (11.53%) Eimeria oocyst in parakeet and 4 (100%) Tetrameres sp. in Indian open-billed storks.

Seasonal and Sexual Variation in mRNA Expression of Selected Adipokine Genes Affecting Fat Deposition and Metabolism of the Emu (Dromaius Novaehollandiae)

Emus are farmed for fat production. Oil rendered from their back and abdominal fat pads has good anti-oxidant and anti-inflammatory properties and has ingredients that promote cell growth. Our objective is to examine the mRNA expression of 7 emu adipokine genes (eFABP4, eSCD1, eAdipoQ, eAdipoR1, eAdipoR2, Lept and eLepR) to identify gene markers that may help improve emu fat production. Back and abdominal fat tissues from 11 adult emus were biopsied at four time points (April, June, August and November). Total RNA was isolated and cDNA was synthesized. Gene specific primers were designed for partial cloning fragments to amplify the open reading frame of the 7 genes. Lept was not expressed in emu fat tissue. Nucleotides and amino acids sequences of the 6 expressed gene were compared with homologs from other species and phylogenetic relationships established. Seasonal mRNA expression of each gene was assessed by quantitative RT-PCR and differential expression analysed by the 2−ΔΔCT method. The temporal mRNA expression pattern of the genes and the fat gain (kg) between time points association with gene expression level were determined. More whole-genome scanning studies are needed to develop novel molecular markers that can be applied to improve fat production in emus.

Gross anatomical studies on the femur, tibio-tarsus and fibula of emu (Dromaius novaehollandiae)

The study was conducted on three adult emu birds of 2-3 years of age. The femur was a relatively short, but thickbone, measuring about 23±0.43 cm in length.The fovea capitiswas absent.The large trochanter major was at the same level as the head.A large pneumatic foramen was present on the caudal surface of the femur, medioventrally to the trochanter major. Distal extremity of femur showed a trochlea anteriorly and two condyles posteriorly.The tibio-tarsus waslongest and formed by the fusion of the tibia and proximal row of tarsalbones.The average length was 43±0.68 cm, was almost twice as long as the femur.The cranial part of the proximal end was greatly expanded which formed a large ridge, the proximal end of which was divided to form lateraland medial cranial ridges.The distal end showed lateral and medial condyles cranially and a trochlea with symmetrical ridges caudally. The fibula was shorter than the tibia, measuring about 29±0.23 cm in length with a prominent head.

Eggs of extinct dwarf island emus retained large size

Islands off southern Australia once harboured three subspecies of the mainland emu ( Dromaius novaehollandiae ), the smaller Tasmanian emu ( D. n. diemenensis ) and two dwarf emus, King Island emu ( D. n. minor ) and Kangaroo Island emu ( D. n. baudinianus ), which all became extinct rapidly after discovery by human settlers. Little was recorded about their life histories and only a few historical museum specimens exist, including a number of complete eggs from Tasmania and a unique egg from Kangaroo Island. Here, we present a detailed analysis of eggs of dwarf emus, including the first record of an almost complete specimen from King Island. Our results show that despite the reduction in size of all island emus, especially the King Island emu that averaged 44% smaller than mainland birds, the egg remained similar sized in linear measurements, but less in volume and mass, and seemingly had a slightly thinner eggshell. We provide possible reasons why these phenomena occurred.

Observational study on the breeding performance of emus (Dromaius novaehollandiae) in Brazil

ABSTRACT The objective of this study was to describe emus’ breeding performance in Brazil at different ages, grouped in couples or colonies. The duration of the breeding season and the production of eggs per female housed were recorded, and the productivity and breeding variables were associated with the variation of the photoperiod. The total production of the flock was 180 eggs, and the breeding season lasted 167 days (April-September), a period with an average of 11 h and 11min of daylight. The breeding season lasted 113, 133 and 82 days, the numbers of eggs produced per female were 7.29, 25.67 and 17.3, and productivity values were 31.6, 38.6, and 45.4% in the groups of birds with ages of two, four and seven years, respectively. The breeding season in 2016 occurred between April and August in Brazil. Older birds tended to start breeding later. The production rate observations indicated that earlier peak production was associated with lower egg production potential. Finally, there was a tendency for better breeding performance of birds housed in couples than in groups with more birds.