scholarly journals Histomorphometric changes in the wing bones of the fruit bat,Pteropus poliocephalus, (Megachiroptera: Pteropidae) in relation to increased bone strain and the failure of a good (?) hypothesis

2010 ◽  
Vol 35 (2) ◽  
pp. 341-348 ◽  
Author(s):  
M. Bennett ◽  
M. Forwood
Keyword(s):  
Bone Strain ◽  
Fruit Bat ◽  
Pteropus Poliocephalus ◽  
Good Hypothesis

scholarly journals Cycle of the Seminiferous Epithelium in the Grey-headed Fruit Bat, Pteropus poliocephalus

1987 ◽  
Vol 40 (2) ◽  
pp. 203 ◽  
Author(s):  
MichaeI A McGuckin ◽  
Alan W Blackshaw
Keyword(s):  
Dna Synthesis ◽  
Meiotic Prophase ◽  
Seminiferous Epithelium ◽  
Nuclear Morphology ◽  
Fruit Bat ◽  
Pteropus Poliocephalus

The seminiferous epithelial cycle of wild P. poliocephalus could be divided into eight stages on the basis of cellular associations and nuclear morphology. The relative frequencies of the stages (1-8) were, respectively: 15'8,20'5,9'4,8'9,11'1,7'7,9'8, and 16�8%. The duration of the cycle was determined by intratesticular injection of [3Hlthymidine followed by autoradiography and estimated to be 16�0 days. The duration of meiotic prophase and spermiogenesis were both 23� 3 days. Spermatocyte DNA synthesis appeared to occur in leptotene primary spermatocytes in stage 2. The duration of spermatogenesis is similar to that in man although the organization of the cycle resembles that of rodents.

Daytime behaviour of the grey-headed flying fox Pteropus poliocephalus Temminck (Pteropodidae: Megachiroptera) at an autumn/winter roost.

2006 ◽  
Vol 28 (1) ◽  
pp. 7 ◽  
Author(s):  
K. A. Connell ◽  
U. Munro ◽  
F. R. Torpy
Keyword(s):  
Management Strategies ◽  
Reproductive Period ◽  
Urban Environments ◽  
Flying Foxes ◽  
Fruit Bat ◽  
Open Forest ◽  
Pteropus Poliocephalus ◽  
Baseline Information ◽  
Daytime Behaviour ◽  
Flying Fox

The grey-headed flying fox (Pteropus poliocephalus Temminck) is a threatened large fruit bat endemic to Australia. It roosts in large colonies in rainforest patches, mangroves, open forest, riparian woodland and, as native habitat is reduced, increasingly in vegetation within urban environments. The general biology, ecology and behaviour of this bat remain largely unknown, which makes it difficult to effectively monitor, protect and manage this species. The current study provides baseline information on the daytime behaviour of P. poliocephalus in an autumn/winter roost in urban Sydney, Australia, between April and August 2003. The most common daytime behaviours expressed by the flying foxes were sleeping (most common), grooming, mating/courtship, and wing spreading (least common). Behaviours differed significantly between times of day and seasons (autumn and winter). Active behaviours (i.e., grooming, mating/courtship, wing spreading) occurred mainly in the morning, while sleeping predominated in the afternoon. Mating/courtship and wing spreading were significantly higher in April (reproductive period) than in winter (non-reproductive period). Grooming was the only behaviour that showed no significant variation between sample periods. These results provide important baseline data for future comparative studies on the behaviours of flying foxes from urban and ?natural? camps, and the development of management strategies for this species.

scholarly journals Novel strains of Klebsiella africana and Klebsiella pneumoniae in Australian Fruit Bats (Pteropus poliocephalus)

2021 ◽  
Author(s):  
Fiona K McDougall ◽  
Kelly L Wyres ◽  
Louise M Judd ◽  
Wayne S J Boardman ◽  
Kathryn E Holt ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Resistance Genes ◽  
Multidrug Resistant ◽  
Sensu Stricto ◽  
The Public ◽  
Fruit Bat ◽  
Faecal Samples ◽  
Antimicrobial Resistance Genes ◽  
Pteropus Poliocephalus ◽  
Sequence Types

Over the past decade human associated multidrug resistant (MDR) and hypervirulent Klebsiella pneumoniae lineages have been increasingly detected in wildlife. This study investigated the occurrence of K. pneumoniae species complex (KpSC) in grey-headed flying foxes (GHFF), an Australian fruit bat. Thirty-nine KpSC isolates were cultured from 275 GHFF faecal samples (14.2%), comprising K. pneumoniae (sensu stricto) (n=30), Klebsiella africana (n=8) and Klebsiella variicola subsp. variicola (n=1). The majority (79.5%) of isolates belonged to novel sequence types (ST), including two novel K. africana STs. This is the first report of K. africana outside of Africa and in a non-human host. A minority (15.4%) of GHFF KpSC isolates shared STs with human clinical K. pneumoniae strains, of which, none belonged to MDR clonal lineages that cause frequent nosocomial outbreaks, and no isolates were characterised as hypervirulent. The occurrence of KpSC isolates carrying acquired antimicrobial resistance genes in GHFF was low (1.1%), with three K. pneumoniae isolates harbouring both fluoroquinolone and trimethoprim resistance genes. This study indicates that GHFF are not reservoirs for MDR and hypervirulent KpSC strains, but they do carry novel K. africana lineages. The health risks associated with KpSC carriage by GHFF are deemed low for the public and GHFF.

scholarly journals Are Megabats Flying Primates? Contrary Evidence from a Mitochondrial DNA Sequence

1988 ◽  
Vol 41 (3) ◽  
pp. 327 ◽  
Author(s):  
S Bennett ◽  
LJ Alexander ◽  
RH Crozier ◽  
AG Mackinlay
Keyword(s):  
Mitochondrial Dna ◽  
Dna Sequence ◽  
Dna Sequences ◽  
Phylogenetic Analyses ◽  
Fruit Bats ◽  
Fruit Bat ◽  
Pteropus Poliocephalus ◽  
Connection System ◽  
Considerable Doubt ◽  
Contrary Evidence

Bats (Chiroptera) are divided into the suborders Megachiroptera (fruit bats, 'megabats') and Microchiroptera (predominantly insectivores, 'microbats'). It had been found that megabats and primates share a connection system between the retina and the midbrain not seen in microbats or other eutherian mammals, and challenging but plausible hypotheses were made that (a) bats are diphyletic and (b) megabats are flying primates. We obtained two DNA sequences from the mitochondrion of the fruit bat Pteropus poliocephalus, and performed phylogenetic analyses using the bat sequences in conjunction with homologous Drosophila, mouse, cow and human sequences. Two trees stand out as significantly more likely than any other; neither of these links the bat and human as the closest sequences. These results cast considerable doubt on the hypothesis that megabats are particularly close to primates.

scholarly journals Seasonal Changes in Spermatogenesis (Including Germ Cell Degeneration) and Plasma Testosterone Concentration in the Grey-headed Fruit Bat, Pteropus poliocephalus

1987 ◽  
Vol 40 (2) ◽  
pp. 211 ◽  
Author(s):  
MichaeI A McGuckin ◽  
Alan W Blackshaw
Keyword(s):  
Germ Cell ◽  
Breeding Season ◽  
Cell Loss ◽  
Plasma Testosterone ◽  
Cell Degeneration ◽  
Fruit Bat ◽  
Pteropus Poliocephalus ◽  
Maximal Plasma ◽  
Testicular Size ◽  
Tubule Diameter

Maximal testicular size of P. poliocephalus occurred during the February-March-April period (autumn breeding season) associated with maximal plasma levels of testosterone (121' 5 � 23� 4 nmol/I). Testicular size decreased after the breeding season concomitant with a decrease in plasma testosterone (7'6 � 1�7 nmol/I). Histologically, regressive changes were observed in the testis after the breeding season including a decrease in seminiferous tubule diameter and a decrease in Leydig cell nuclear diameter. Significant germ cell loss occurred during the breeding season (44%) mainly during the final spermatogonial division and meiosis and increased in regressed testes (69%), being accentuated chiefly at meiosis. All regressed testes showed some sperm production although it was much reduced after the breeding season; however, optimal fertility appears to be restricted to autumn by the large increases in testosterone secretion which only occur at this time.

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