The Gross and Micro Anatomy of the Accessory Sex Glands of the Male Agouti (<i>Dasyprocta leporina</i>)

Mollineau, W. M.; Adogwa, Andrew; Garcia, Gary Wayne

doi:10.1111/j.1439-0264.2008.00922.x

Cited by 23 publications

(34 citation statements)

References 10 publications

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“…The implications of these EE Protocols for semen collection from D. leporina [8,9] and D. azarae [5] may provide some primary information necessary for research in developing further reproductive techniques such as artificial insemination. The three Protocols compared depended on the application of incremental stimuli via voltage ranging from 2 to 12 volts and application periods from 2 to 5 seconds [8,10,11].…”

Section: Discussionmentioning

confidence: 99%

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Electro Ejaculation of Two Species of Agouti (Dasyprocta spp.) in Brazil and Trinidad and Tobago

Mollineau¹,

Mollineau²

2017

MOJAP

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The meat of Neo-tropical fauna is savoured in parts of the Caribbean, Central and South America. Dasyprocta species is one animal hunted for its meat and this activity may eventually threaten their survival. However, efforts made to domesticate these wild animals lead to the development of farming systems. Reproduction has been a valuable tool in the process of domestication. Therefore, part of this effort included research directed at understanding the reproductive attributes of the male agouti. Electro-ejaculation was used to collect semen from Dasyprocta leporina and Dasyprocta azarae. This mini review compared three electro-ejaculation protocols developed for Dasyprocta species in Brazil and the Republic of Trinidad and Tobago. These procedures were applied after the animals were anaesthetized. Collected ejaculates that contained spermatozoa were expressed as percentages of the total number of ejaculated collected and used as a measure of the effectiveness for the respective three Protocols. The most effective was Protocol 3 (100%). However, this was achieved with the administering of 5 different anaesthetics which may cause some potential damage to the agouti. Conversely, 75% successes were obtained then Xylazine 20mg/ kg (Protocol 1, T4) and Ketamine 20mg/kg and Xylazine 40mg/kg (Protocol 2, T8) were administered, respectively. The ejaculate with the largest concentration of spermatozoa (431±180×10 6 /ml) were collected for Protocol 1, T4. Furthermore, no such specifics were listed for ejaculates collected from Protocol 3. In conclusion, the three Protocols should be reviewed to develop a procedure which utilizes resources efficiently and produces results that are quantitatively and qualitatively desirable.

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Section: Discussionmentioning

confidence: 99%

“…Domestication efforts encouraged research directed at understanding the reproductive attributes of the male agouti. Such works included the anatomy [1,4,5], physiology of the male reproductive system [6], and courtship behavior [7].…”

Section: Introductionmentioning

confidence: 99%

Electro Ejaculation of Two Species of Agouti (Dasyprocta spp.) in Brazil and Trinidad and Tobago

Mollineau¹,

Mollineau²

2017

MOJAP

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“…Histologicamente, a próstata da capivara apresentase semelhante às glândulas vesiculares, a não ser em relação à glândula próstata possuir trabéculas de tecido conjuntivo frouxo, que envolve os componente glandulares junto com uma camada de tecido muscular liso, possuindo glândulas de aspecto tubular com luz contendo grânulos acidófilo, mucosa com pregas altas ramificadas, como descrito por Junqueira & Martins (1947) e Gude et al (1982) no rato, Matamoros (1981) na paca e Mollineau et al (2009) na cutia.…”

Section: No Rato De Areia (Psammomys Obesus)unclassified

“…Ao contrário, segundo Hebel & Stromberg (1986), no rato esta glândula histologicamente não é homogênea, contendo na parte dorsal estreito epitélio colunar pseudoestratificado com ácinos, na periferia epitélio cubóide e dentro das dobras contorcidas e medialmente, amplo epitélio cubóide com ácinos, e de acordo com Soprando et al (1999), no rato de areia (Psammomys obesus) a glândula próstata ventral contem células simples colunares com prolongamentos e a próstata dorsal contem baixo epitélio colunar, e ainda Menezes et al (2003), Mollineau et al (2009) descrevem que o epitélio varia de colunar a pseudoestratificado, com altura do epitélio bastante variável.…”

Section: No Rato De Areia (Psammomys Obesus)unclassified

“…Na capivara como já descreveu Ojasti (1973), as glân-dulas bulbouretrais (glândulas de Cowper) não são identificadas, porém, se a capivara as possui, seu tamanho deve ser reduzido ou sua inserção é bem oculta pelos músculos da raiz do pênis. Na descrição da localização da glândula bulbouretral de cutia Menezes et al (2003) e Mollineau et al (2009) informam que estão dorsolateralmente ao reto, dorsocranialmente aos músculos do esfíncter anal, lateralmente à raiz da cauda, e coberta dorsalmente apenas pela cútis e o tecido subcutâneo, o que as tornam superficiais na região dorsal, na raiz da cauda, fato não descrita na capivara, conforme (Ojasti 1973), cuja informação não se afasta das nossas observações, embora no tratado de Grassé (1955) o autor represente esquematicamente a glândula bulbouretral em algumas espécies de roedores como no rato e no castor canadense.…”

Section: No Rato De Areia (Psammomys Obesus)unclassified

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Análise histológica das glândulas uretrais da capivara (Hydrochoerus hydrochaeris)

et al. 2010

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Para realização do estudo microscópico das glândulas anexas à uretra masculina, foram utilizadas duas capivaras (Hydrochoerus hydrocaeris), adultas, das quais foram coletados fragmentos das glândulas genitais acessórias, imersos em solução fixadora de Bouin e lavados cuidadosamente em álcool de 70% ao absoluto. A seguir foram submetidos aos processos histológicos de rotina e corados pelos métodos de Hematoxilina/Eosina e Tricrômico de Masson. Os resultados morfológicos encontrados foram: o ducto deferente possui um espessamento da parede, onde a luz permanece inalterada e sem presença de epitélio granular. A glândula vesicular possui um epitélio secretor do tipo pseudoestratificado colunar. A glândula prostática possui mucosa com pregueamentos altos e ramificados, revestido por epitélio pseudoestratificado cilíndrico. Machos de capivaras possuem glândulas vesiculares e próstata como glândulas uretrais. No material examinado não foi identificado epitélio secretor correspondente a glândula bulbouretral e morfologicamente assemelha-se aos outros histricomorfos.

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Seasonal Morphological Variations and Age‐Related Changes of the Seminal Vesicle of Viscacha (Lagostomus maximus maximus): An Ultrastructural and Immunohistochemical Study

Chaves

Aguilera-Merlo

Cruceño

et al. 2012

The Anatomical Record

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The viscacha is a seasonal rodent that exhibit an annual reproductive cycle with periods of maximum reproductive activity and gonadal regression. We studied seasonal variations in the morphology and cellular population of the seminal vesicles (SVs) during both periods and in impuber animals. Seminal vesicles were studied by light and electronic microscopy. Measurements of epithelial height, nuclear diameter, luminal diameter, and muscular layer were performed. Also, we studied the distribution of androgen receptors (AR) in this gland during the reproductive cycle and in impuber animal. During gonadal regression, principal and clear cells showed signs of reduced functional activity. These were characterized by an epithelium of smaller height, irregular nuclei, and cytoplasm with few organelles, dilated cisterns, and glycogen granules. In impuber animals, the principal cells showed large nuclei with chromatin lax and cytoplasm with small mitochondria, poorly developed Golgi apparatus, and granules of glycogen. On the other hand, the cells exhibited seasonal variations in the distribution and percentage of immunolabeled cells to AR throughout the annual reproductive cycle. During the gonadal regression period, glandular mucosa exhibited numerous epithelial cells with intense nuclear staining. However, fibromuscular stromal cells were weakly positive for AR in contrast to what was observed during the activity period. Considering that testosterone values are lower in adult animals during the period of gonadal regression and in impuber animals, our immunohistochemical results show a significant correlation with the percentage of AR-immunopositive cells. In conclusion, these results demonstrate that the structure of the SVs changes in the activity period of viscacha, probably because of elevated levels of testosterone leading to an increase in the secretory activity of epithelial cells.

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The Gross and Micro Anatomy of the Accessory Sex Glands of the Male Agouti (Dasyprocta leporina)

Cited by 23 publications

References 10 publications

Electro Ejaculation of Two Species of Agouti (Dasyprocta spp.) in Brazil and Trinidad and Tobago

Electro Ejaculation of Two Species of Agouti (Dasyprocta spp.) in Brazil and Trinidad and Tobago

Análise histológica das glândulas uretrais da capivara (Hydrochoerus hydrochaeris)

Seasonal Morphological Variations and Age‐Related Changes of the Seminal Vesicle of Viscacha (Lagostomus maximus maximus): An Ultrastructural and Immunohistochemical Study

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