Studies of the accessory glands of male marsupials

Rodger, John C.; Hughes, RL

doi:10.1071/zo9730303

Cited by 51 publications

(46 citation statements)

References 8 publications

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“…Similarmente ao que ocorre na maioria dos marsupiais, as glândulas sexuais acessórias de Metachirus são a próstata e as glândulas bulbouretrais (Rodger & Hughes 1973, Setchell 1977, Temple-Smith 1984Tyndale-Biscoe & Renfree 1987, Dawson et al 1988, Ribeiro & Nogueira 1982, Nogueira 1989, Martinelli 1990, Costa et al 1994, Costa 1995, 1996, Barros et al 2003, Cruz et al 2011a, 2011b, Nogueira 2012, Lima et al 2013.…”

Section: Discussionunclassified

“…O formato de "cenoura" parece ser o predominante nas espécies americanas (Setchell 1977, Martan 1983, Garcia & Gonçalves 1984, Dawson et al 1988, Nogueira 1988, Martinelli 1990, Barros et al 2003 na família Didelphidae), entretanto, uma espécie da família Caenolestidae (C. obscurus) apresenta a próstata em forma de coração (Setchell 1977, Tyndale-Biscoe & Renfree 1987, Dawson et al 1988. De acordo com Rodger & Hughes (1973), Temple-Smith (1984) e Dawson et al (1988), a próstata com forma de coração também está presente em marsupiais australianos.…”

Section: Discussionunclassified

Section: Microtarsus)unclassified

“…De acordo com Rodger & Hughes (1973) e Temple-Smith (1984, mucossubstâncias neutras ou ácidas são os principais tipos de secreção prostática em espécies australianas. Lípides e proteínas também contribuem em pequenas quantidades.…”

Section: Microtarsus)unclassified

“…Devido às diferenças de segmentação da próstata entre marsupiais americanos e australianos (Rodger & Hughes 1973, Dawson et al 1988, tornou-se difícil comparar os segmentos prostá-ticos entre os dois grupos. De acordo com Rodger & Hughes (1973) e Temple-Smith (1984, mucossubstâncias neutras ou ácidas são os principais tipos de secreção prostática em espécies australianas. A presença de mucossubstâncias neutras e ácidas, glicogênio e proteínas na próstata é registrada em espécies de marsupiais da família Didelphidae já estudados, havendo diferenças, entre as espécies, com relação ao teor e ao local de produção destas substâncias (Hruban et al 1965, Martan & Allen 1965, Ribeiro 1981, Martan 1983, Garcia & Gonçalves 1984, Nogueira et al 1984, Martinelli et al 1991, Costa 1995, Carvalho 1996.…”

Section: Introductionunclassified

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Morfologia e histoquímica das glândulas sexuais acessórias de Metachirus nudicaudatus, Didelphidae-Marsupialia

et al. 2016

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ABSTRACT.-Costa S.F., Nogueira J.C., Zangeronimo M. This paper describes the morphology and distribution of glycogen and mucous substances in the prostate and the bulbourethral glands of Metachirus nudicaudatus (Geoffroy, 1803), the only species of the genus. The prostate is surrounded by the tunica adventitia, and muscle and stroma is formed by connective urethral mucosa. The glandular parenchyma consists of secretory tubules, scattered throughout the connective tissue of the urethral mucosa which differs histologically and histochemically in cranial, middle, and caudal segments of the prostate. These morpho-histochemical differences are also observed in the outer, middle and inner parts of the tubular epithelium of each prostatic segment. In general, prostatic segments secrete neutral mucous substances, and the caudal segment also produces glycogen. The three pairs of bulbourethral glands (lateral, intermediate and medial) are surrounded by a capsule of dense connective tissue and skeletal striated muscle. The glandular parenchyma is formed by tubules or branched tubuloacinar, covered by simple epithelium which is characteristic for each pair of glands. The lateral bulbourethral glands and the medial bulbourethral glands produce neutral mucous substances and the secretion of the intermediate bulbourethral glands consists of neutral mucous substances, carboxylated acids, and sulfated acids. The M. nudicaudatus does not have ampullary glands, seminal vesicles or coagulating glands.

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Section: Discussionunclassified

Section: Microtarsus)unclassified

Section: Introductionunclassified

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Morfologia e histoquímica das glândulas sexuais acessórias de Metachirus nudicaudatus, Didelphidae-Marsupialia

et al. 2016

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Seasonal changes in the reproductive anatomy of maleAntechinus stuartii (Marsupialia: Dasyuridae)

1997

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Male Antechinus stuartii (Marsupialia: Dasyuridae) undergo significant endocrinological changes during their life history. The endocrine changes are associated with complete male mortality. The accessory reproductive tract of males is important for seminal plasma production, and changes associated with the reproductive cycle were not described in detail by earlier studies. The present study sought to describe some of the seasonal changes in structure of the male accessory reproductive tract in relation to the known hormonal changes. The epididymis, prostate, and bulbourethral glands are relatively undifferentiated in February and May, a time when plasma concentrations of testosterone are known to be low. By July, considerable hypertrophy and differentiation of the accessory reproductive tract are observed. This is most obvious in the bulbourethral glands, which change from being indistinguishable from one another in February and May to being three large morphologically and histologically distinct glands in July. The hypertrophy and secretory activity continue into August, the breeding season. These findings correlate with the hormonal profiles found in other studies of A. stuartii. J Morphol 231:261–275, 1997. © 1997 Wiley‐Liss, Inc.

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The features of sperm maturation in the epididymis of a marsupial, the brushtailed possum Trichosurus vulpecula

Temple-Smith

Bedford

1976

Am. J. Anat.

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Possum spermatozoa undergo a distinctive process of maturation in the epididymis, as shown by change in the properties of the sperm surface, by modification of their morphology and by their increasing capacity for progressive motility. Modification of the sperm surface over the head and tail is demonstrated by the different affinities of sperm from successive regions of the epididymis for FITC-conjugated wheat germ agglutinin and concanavalin A, and for cationic ferric oxide colloidal particles. Changes in sperm head morphology are caused by (1) a dramatic reshaping and consolidation of the acrosome in which excess plasma membrane overlying it is sloughed as a cluster of vesicles, (2) a reorientation of the nucleus almost parallel to the axis of the tail and (3) distal movement of the droplet from its initial envelopment of the nucleus to an eccentric position on the anterior segment of the midpiece. Spermatozoa released from the testis and caput epididymidis are essentially immotile or exhibit only lazy uncoordinated movements, whereas many from the corpus and most from the more distal regions of the epididymis display an energetic, progressive motility imparted by a rapid and stiff tail beat of narrow arc. This maturation of the capacity for motility is accompanied by an enhanced stability of the dense fibers and sheath, which became more resistant to the disruptive action of SDS and DTT, and by changes in the ultrastructure of the sperm tail. These include modification of the matrix of the mitochondria and also an unusual differentation of the midpiece into two distinct segments. The anterior segment is defined by profuse peri-mitochondrial stacks of membranes which developed as spermatozoa pass through the epididymis. These membranes, although prominent in mature spermatozoa fixed in situ, appear sparse and disorganised in spermatozoa fixed after 15 to 30 minutes of active motility in physiological medium, suggesting their possible utilisation in motile spermatozoa. The posterior segment is characterised by a thick peri-mitochondrial cytoplasmic sleeve, by spirally arranged parallel fibrous bands immediately beneath the plasma membrane and, subsequently, as spermatozoa pass into the lower corpus epididymidis, by rows of flask-shaped surface invaginations which develop between the spiral bands. Despite broad similarities in the features of sperm maturation in this marsupial and in eutherian mammals, there are distinct differencesin the structural organisation of their spermatozoa, particularly in the pserm head. Until more is known of the details of fertilisation in marsupials the significance of these differences will remain unclear.

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Studies of the accessory glands of male marsupials

Cited by 51 publications

References 8 publications

Morfologia e histoquímica das glândulas sexuais acessórias de Metachirus nudicaudatus, Didelphidae-Marsupialia

Morfologia e histoquímica das glândulas sexuais acessórias de Metachirus nudicaudatus, Didelphidae-Marsupialia

Seasonal changes in the reproductive anatomy of maleAntechinus stuartii (Marsupialia: Dasyuridae)

The features of sperm maturation in the epididymis of a marsupial, the brushtailed possum Trichosurus vulpecula

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