Reproduction in female Eptesicus regulus (Thomas) (Vespertilionidae), in south-western Australia

1978 ◽  
Vol 26 (2) ◽  
pp. 257 ◽  
Author(s):  
DJ Kitchener ◽  
SA Halse
Keyword(s):  
Reproductive Cycle ◽  
Western Australia ◽  
Museum Specimens ◽  
Histological Techniques ◽  
The Right

The reproductive cycle of female Eptesicus regulus is outlined from histological techniques on museum specimens collected in south-western Australia over the last 15 years. E. regulus is monoestrous and gives birth to a single young in November or December. It copulates in autumn and stores sperm over winter. Ovulation and fertilization is at the end of winter. Both ovaries are functional but pregnancy occurs only in the right horn.

Reproduction in female Chalinolobus morio (Gray) (Vespertilionidae) in South-Western Australia

1981 ◽  
Vol 29 (3) ◽  
pp. 305 ◽  
Author(s):  
DJ Kitchener ◽  
P Coster
Keyword(s):  
Reproductive Cycle ◽  
Western Australia ◽  
Reproductive Organs ◽  
Museum Specimens ◽  
Histological Techniques ◽  
The Right ◽  
Uterine Glands

The reproductive cycle of C. morio is outlined from examination of reproductive organs in situ and from histological techniques on Museum specimens collected in south-western Australia over the last 46 years. Changes in ovaries, endometria (and glands), epithelia lining tracts and Bartholin's glands are described. C. morio is monoestrous. It copulates in autumn and stores sperm in oviducts and uterine glands until ovulation in winter. Both ovaries are functional. Trans-uterine migration of the developing zygote is recorded. It normally gives birth to a single young, although occasionally to twins, between mid-September and mid-November. In the case of twins both uterine horns are gravid, otherwise only the right horn is gravid.

Reproduction in the Female White-Striped Mastiff Bat, Tadarida australis (Gray) (Molossidae)

1982 ◽  
Vol 30 (1) ◽  
pp. 1 ◽  
Author(s):  
DJ Kitchener ◽  
CJ Hudson
Keyword(s):  
Reproductive Tract ◽  
Reproductive Organs ◽  
Uterine Horn ◽  
Museum Specimens ◽  
Histological Techniques ◽  
Lactating Females ◽  
Young Of The Year ◽  
The Right ◽  
Reproductive Phases

The reproductive cycle of female T, australis is outlined from examination of reproductive organs in situ and from histological techniques on museum specimens collected in Australia, south of latitude 22�S., over the last 88 years. Features of the reproductive tract and ovaries during important repro- ductive phases are described. There is a marked asymmetry of the reproductive organs, only the right ovary and uterine horn being functional. T. australis is monoestrous; there is no indication of marked differences in the timing of reproductive phases between regional populations. A single, deeply embed- ded corpus luteum occupies up to 60% of the ovary and degenerates at about the time of parturition. Apparently, most females, including young of the year, become pregnant each year, and give birth to a single young, usually between mid-December and late January, although occasionally as late as the end of February. Most young are weaned by early May. There is a short anoestrus, which is probably restricted to early lactating females, followed by a relatively long pro-oestrus. Copulation, ovulation and fertilization occur around late August. There is no evidence of hibernation.

Reproduction in the common sheath-tailed bat, Taphozous georgianus (Thomas) (Microchiroptera : Emballonuridae), in Western Australia

1973 ◽  
Vol 21 (3) ◽  
pp. 375 ◽  
Author(s):  
DJ Kitchener
Keyword(s):  
Corpus Luteum ◽  
Western Australia ◽  
Reproductive Tract ◽  
Vas Deferens ◽  
Gestation Period ◽  
Early Winter ◽  
Male And Female ◽  
The Common ◽  
The Right

The reproductive and associated organs of both male and female T. georgianus are briefly described. In females, only the right ovary is functional and pregnancies occur only in the right horn. They are monovular and the corpus luteum occupies most of the ovary and is deeply embedded in its stroma. Females are monotocous and the gestation period is probably about 4 months, young being born from October to February. They are monestrous and there is an autumn and early winter dioestrousanoestrous period. Spermatozoa are not stored in the reproductive tract of females and copulation appears to coincide with the oestrous condition. In males, spermatogenesis proceeds throughout the year and spermatozoa are present in the epididymis and vas deferens in all months that males were collected (no records for December). Spermatozoa are also found in the ampulla of Henle and vesicula seminalis in most months of the year. The position of the testes varies with season: in summer they descend to the scrota1 sacs; in autumn, winter, and spring they are more abdominal.

A comparative account of the reproductive cycles of five species of marine mussels (Bivalvia: Mytilidae) in the vicinity of Fremantle, Western Australia

1967 ◽  
Vol 18 (2) ◽  
pp. 175 ◽  
Author(s):  
BR Wilson ◽  
EP Hodgkin
Keyword(s):  
Reproductive Cycle ◽  
Western Australia ◽  
Marine Species ◽  
Spawning Season ◽  
Latitudinal Distribution ◽  
Marine Mussels ◽  
Reproductive Cycles ◽  
Determining Factor ◽  
Pacific Species

Descriptions are given of the reproductive cycles of five marine species of mussels. Two of these species have a southern Australian distribution and three are tropical Indo-Pacific species or have Indo-Pacific affinities. The reproductive cycles differ significantly, each species exhibiting a characteristic breeding pattern. A distinction is drawn between the season of gametogenic activity and the much narrower season of actual spawning. In four of the species the major features of the reproductive cycle correlate with latitudinal distribution. This is interpreted as evidence supporting the role of temperature as a principal determining factor in the control of broader aspects of the reproductive cycle (i.e. duration and season of gametogenic activity). Differences in finer details of the reproductive cycles (e.g. spawning season and number of spawning peaks) appear to be controlled by unknown factors besides temperature.

Reproductive cycle of purple clam, Amiantis purpurata (Bivalvia: Veneridae) in northern Patagonia (Argentina)

2005 ◽  
Vol 85 (2) ◽  
pp. 367-373 ◽  
Author(s):  
Enrique M. Morsan ◽  
Marina A. Kroeck
Keyword(s):  
Reproductive Cycle ◽  
Continuous Process ◽  
Early Summer ◽  
Maturation Stage ◽  
Reproductive Pattern ◽  
Oocyte Diameter ◽  
Histological Techniques ◽  
Northern Patagonia ◽  
History Of ◽  
Quantitative Indicators

The reproductive cycle of the purple clam (Amiantis purpurata) northern Patagonian population was studied throughout a 19-month period (September 1993–March 1995) using standard histological techniques and quantitative indicators (oocyte diameter distributions, oocytes per ocular field and relative oocyte area). In this species gametogenesis is a continuous process involving a complete gonadal restitution after the end of the reproductive season (no resting period). The proliferation phase occurs during the coldest half of the year (April to September) and maturation takes place during spring (September to December). Several partial emissions of gametes, with subsequent restitution of the gametogenic series, occur during the summer months. During the total maturation stage, oocytes never filled the whole alveolar area: maximum per cent of alveolar sections occupied by oocytes (46%) was observed in late spring–early summer. Implications of the reproductive pattern in the context of palaeogeographic history of northern Patagonia, and the isolation of this population are discussed.

Karripurcellia, a new pettalid genus (Arachnida : Opiliones : Cyphophthalmi) from Western Australia, with a cladistic analysis of the family Pettalidae

2003 ◽  
Vol 17 (3) ◽  
pp. 387 ◽  
Author(s):  
Gonzalo Giribet
Keyword(s):  
Western Australia ◽  
New Genus ◽  
Cladistic Analysis ◽  
Sister Group ◽  
Museum Specimens ◽  
Anal Glands ◽  
Australian Species ◽  
Species Cluster ◽  
The Family ◽  
Group Relationships

Examination of museum specimens belonging to the cyphophthalmid Gondwanan family Pettalidae has rendered a collection of specimens placed in the new genus Karripurcellia. The genus includes three species, K.�peckorum, sp. nov., K. sierwaldae, sp. nov. and K. harveyi, sp. nov., from the Pemberton area in Western Australia. These are the first cyphophthalmid species found outside Queensland in Australia. Karripurcellia, gen. nov. is distinguished from other Australian pettalids by the lack of modifications in the anal plate, as well as the lack of the typical male anal glands of pettalids, sironids and the stylocellid genus Fangensis Rambla, 1994. Two of the species, K. peckorum, sp. nov. and K. sierwaldae, sp. nov., live sympatrically and have been collected in the same litter samples in one locality. The proposition of the new genus is accompanied by a cladistic analysis of all pettalid genera and most species within each genus, with the exception of the species-rich genus Rakaia Hirst, 1925. The cladistic analysis supports the monophyly of the Karripurcellia, gen. nov. species, but their sister-group relationships are unclear. However, the remaining Australian species cluster with the pettalids from New Zealand and South Africa, but not with Karripurcellia, sp. nov.

Reproduction in Abra Alba (Wood) and Abra Tenuis (Montagu) (Tellinacea: Scrobiculariidae)

1980 ◽  
Vol 60 (2) ◽  
pp. 465-479 ◽  
Author(s):  
P. Laskaridou Nott
Keyword(s):  
Reproductive Cycle ◽  
Coastal Waters ◽  
Seasonal Changes ◽  
Dominant Species ◽  
Benthic Communities ◽  
Great Abundance ◽  
Indirect Methods ◽  
Histological Techniques ◽  
North West ◽  
Marine Bivalves

Abra alba and Abra tenuis are closely related marine bivalves. They both inhabit similar types of sandy-mud sediments but they prefer different localities. The smaller A. tenuis is found in a few scattered intertidal mudflats, whereas A. alba is more widely distributed and in great abundance in the coastal waters of north-west Europe. The latter can be found at any depth between low-water mark and 80 m (Tebble, 1966; Ansell, 1974) and often forms the dominant species of shallow water benthic communities.The reproductive cycle of the two species has been studied and compared as a part of a wider ecological investigation. There is minimal literature concerning the reproduction of A. tenuis but A. alba has received a lot of attention, because it forms a major source of food for flatfish. However, most of the earlier investigations are confined to the time that spawning occurs with the evidence derived from either the time of the year that larvae appear in the plankton (Lebour, 1938; Jorgensen, 1946; Fosshagen, 1965; Muus, 1973; Rasmusen, 1973), or the time of the year that juveniles first appear in the bottom samples (Orton, 1924; Ford, 1925; Stephen, 1932). The inadequacy of such indirect methods has been discussed by Seed (1969,1975, 1976). Ansell (1974) derived the reproductive cycle of A. alba from seasonal changes in the biochemical composition. In the present investigation, histological techniques have been used, since they are considered to offer the most reliable information about the reproductive cycle (Seed, 1969, 1975, 1976).

scholarly journals The Male Reproductive Cycle of the Spotted Toad-Headed Agama,Phrynocephalus maculatus, in Iran

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Soheila Rahmani ◽  
Vida Hojati
Keyword(s):  
Reproductive Cycle ◽  
Arid Regions ◽  
Tunica Albuginea ◽  
Reproductive Activity ◽  
Seminal Vesicles ◽  
Adult Males ◽  
Germinal Layer ◽  
Histological Studies ◽  
The Right ◽  
Semnan Province

The spotted toad-headed agama,Phrynocephalus maculatus, distributed in the central and southeastern arid regions of Iran, belongs to the Agamidae family. In this research, the male reproductive cycle of this species was studied from 5 April to 5 August, 2013. Totally, 40 adult males were collected at midday from southern deserts of Damghan County, located in Semnan Province of Iran. Testes were removed and processed for morphometric and histological studies. The spermatogenic cycle begins from early April, mating occurs in mid-May, and it ends in August. Maximum reproductive activity occurs in early June and reduces from early July and ends in August. The numbers of seminal vesicles were 33–127 and their diameter varied between 69.0 and 258.3 microns. The diameter of tunica albuginea varied between 3.0 and 8.1 microns. The diameter of germinal layer varied between 10.0 and 110.0 microns. There were significant differences in macroscopic and microscopic testicular characters between months. Also, there were no significant differences in the testicular and hemipenal characters between the left side and the right side of body. Since spermatogenesis occurs from April through August,P. maculatusfollows an associated reproductive cycle typical for temperate species.

scholarly journals On the Bennelongia barangaroo lineage (Crustacea, Ostracoda) in Western Australia, with the description of seven new species

2013 ◽  
Author(s):  
Koen Martens ◽  
Stuart Halse ◽  
Isa Schön
Keyword(s):  
New Species ◽  
Western Australia ◽  
Molecular Evidence ◽  
Nominal Species ◽  
Rock Pools ◽  
Additional Species ◽  
Coi Sequences ◽  
The Right ◽  
Genetic Species Concept ◽  
Genetic Species

The ostracod genus Bennelongia De Deckker & McKenzie, 1981 is endemic to Australia and New Zealand. Extensive sampling in Western Australia (WA) revealed a high specific and largely undescribed diversity. Here, we describe seven new species belonging to the B. barangaroo lineage: B. timmsi sp. nov., B. gnamma sp. nov., B. hirsuta sp. nov., B. ivanae sp. nov., B. mcraeae sp. nov., B. scanloni sp. nov. and B. calei sp. nov., and confirm the presence of an additional species, B. dedeckkeri, in WA. For five of these eight species, we could construct molecular phylogenies and parsimonious networks based on COI sequences. We also tested for cryptic diversity and specific status of clusters with a statistical method based on the evolutionary genetic species concept, namely Birky’s 4 theta rule. The analyses support the existence of these five species and a further three cryptic species in the WA B. barangaroo lineage. The molecular evidence was particularly relevant because most species described herein have very similar morphologies and can be distinguished from each other only by the shape, size and position of the antero-ventral lapel on the right valve, and, in sexual populations, by the small differences in shape of the hemipenes and the prehensile palps in males. Four species of the WA B. barangaroo lineage occur in small temporary rock pools (gnammas) on rocky outcrops. The other four species are mainly found in soft bottomed seasonal water bodies. One of the latter species, B. scanloni sp. nov., occurs in both claypans and deeper rock pools (pit gnammas). All species, except for B. dedeckkeri, originally described from Queensland, have quite clearly delimited distributions in WA. With the seven new species described here, the genus Bennelongia now comprises 25 nominal species but several more await formal description.

312 An Evaluation of the Clinical and Histological Effects of High Dose Radiosurgery on the Rat Dorsal Root Ganglion

Neurosurgery ◽  
2017 ◽  
Vol 64 (CN_suppl_1) ◽  
pp. 266-267
Author(s):  
Ezequiel Goldschmidt ◽  
Wendy Fellows-Mayle ◽  
Erin Paschel ◽  
Ajay Niranjan ◽  
John Flickinger ◽  
...  
Keyword(s):  
Dorsal Root Ganglion ◽  
Dorsal Root ◽  
The Body ◽  
Male Rats ◽  
High Dose ◽  
Sprague Dawley ◽  
Histopathological Response ◽  
Histological Techniques ◽  
Sensory Deficits ◽  
The Right

Abstract INTRODUCTION Stereotactic radiosurgery (SRS) is a safe and effective technique to create lesions of the brain and trigeminal nerve (TGN) in order to achieve neuromodulation. The lumbar dorsal root ganglion (DRG) contains the body of the sensory neurons responsible for pain sensitivity and can be targeted to treat chronic and debilitating pain in the extremities. Neuromodulation of the DRG might therefore improve chronic peripheral pain. This study was performed to determine the feasibility as well as clinical and histological effects of delivering high dose SRS targeted to the lumbar DRG in a rat model. METHODS Four Sprague Dawley male rats underwent 80 Gy maximum dose single-fraction SRS to the left L5 and L6 DRG using the Leksell Gamma Knife Icon (Elekta, Atlanta, GA) with onboard cone-beam CT imaging using 4 mm diameter collimators. The right L5 and L6 DRGs served as the controls. The animals were evaluated for motor and sensory deficits every two weeks. Two animals were sacrificed at 3 and two at 6 months after SRS. The lumbar spines were harvested and decalcified. Common histological techniques (Masson trichrome, Prussian blue) were used to assess for fibrosis and demyelination. RESULTS >No detectable motor or sensory deficits were seen in any animal. Histological changes including fibrosis and loss of myelin were noted to the left L5 and L6 DRGs, but not the right side control DRGs. Fibrotic changes within the vertebral body were also evident on the treated sides of the vertebral bodies. CONCLUSION We were able to detect a demyelinating histopathological response from SRS delivered to the DRG in rats. Since such changes mimic those seen after trigeminal SRS in experimental animals, we hypothesize that radiosurgery may be a potential option in chronic spinal radicular pain amenable to neuromodulation.

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