Distribution of Spermatozoa in the Oviduct and Fertility in Domestic Birds

Ogasawara, F. X.; LORENZ, F. W.; BOBR, L. W.

doi:10.1530/jrf.0.0110033

Cited by 17 publications

(3 citation statements)

References 12 publications

(19 reference statements)

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“…Although commonly defined as ‘simple tubular invaginations’, SSTs are increasingly appreciated as being highly specialised, with an expanding body of evidence to suggest that the molecular and biochemical processes occurring within SSTs are complex and highly regulated (Bakst, 2011 ; Freedman et al., 2001 ; Hemmings et al., 2015 ; Holm et al., 2000 ; Khillare et al., 2018 ; Mendonca et al., 2019 ; Sasanami, 2017 ). The vagina is typically hostile to sperm: only 1% of inseminated sperm make it into storage (Bakst, 2011 ), and it is thought to be a selective process that probably ensures sperm with atypical morphology and physiology are inhibited from participating in fertilisation (Bakst, 1994 ; Bobr, Lorenz, & Ogasawara, 1964 ; Khillare et al., 2018 ; Ogasawara et al., 1966 ). Once accepted into SSTs, numerous compounds are produced that likely act to suppress sperm motility and provide protection from structural damage and oxidative stress (Bakst & Bauchan, 2015 ; Freedman et al., 2001 ; Holm et al., 2000 ; Huang et al., 2016 , 2017 ; Khillare et al., 2018 ; Matsuzaki et al., 2015 ; Mendonca et al., 2019 ; Sasanami, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…Although commonly defined as 'simple tubular invaginations', SSTs are increasingly appreciated as being highly specialised, with an expanding body of evidence to suggest that the molecular and biochemical processes occurring within SSTs are complex and highly regulated (Bakst, 2011;Freedman et al, 2001;Holm et al, 2000;Khillare et al, 2018;Mendonca et al, 2019;Sasanami, 2017). The vagina is typically hostile to sperm: only 1% of inseminated sperm make it into storage (Bakst, 2011), and it is thought to be a selective process that probably ensures sperm with atypical morphology and physiology are inhibited from participating in fertilisation (Bakst, 1994;Khillare et al, 2018;Ogasawara et al, 1966).…”

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The surprising complexity and diversity of sperm storage structures across Galliformes

Assersohn,

Richards,

Hemmings

2024

Ecology and Evolution

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In internal fertilisers, the precise timing of ovulation with the arrival of sperm at the site of fertilisation is essential for fertilisation success. In birds, mating is often not synchronised with ovulation, but instead females utilise specialised sperm storage tubules (SSTs) in the reproductive tract, which can ensure sperm are always available for fertilisation at the time of ovulation, whilst simultaneously providing a mechanism of post‐copulatory sexual selection. Despite the clear importance of SSTs for fertilisation success, we know little about the mechanisms involved in sperm acceptance, storage, and release. Furthermore, most research has been conducted on only a small number of species, based on which SSTs are usually assumed to look and function in the same way across all species. Here, we conduct a comparative exploration of SST morphology across 26 species of Galliformes. We show that SSTs, and the surrounding tissue, can vary significantly in morphology across species. We provide observational evidence that Galliformes exhibit at least 5 distinct categories of tubule types, including distinctive coiled and multi‐branched tubules, and describe 2 additional features of the surrounding tissue. We suggest functional explanations for variation in tubule morphology and propose next steps for future research. Our findings indicate that SSTs are likely to be far more variable than has previously been assumed, with potentially important consequences for our understanding of sperm storage in birds and post‐copulatory sexual selection in general.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

The surprising complexity and diversity of sperm storage structures across Galliformes

Assersohn,

Richards,

Hemmings

2024

Ecology and Evolution

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“…Alguns estudos sugerem a existência de um processo de seleção dos espermatozóides que permanecem na espermateca (OGASAWARA et al, 1966). Esses mecanismos de entrada e saída dos espermatozóides dos túbulos não estão bem caracterizados, mas sabe-se que somente espermatozóides móveis e morfologicamente normais adentram os túbulos de armazenamento .…”

Section: Introductionunclassified

Análise da compactação da cromatina de espermatozóides de galo (Gallus gallus) e determinação do seu período de armazenamento e distribuição na espermateca de galinhas doi: 10.5007/2175-7925.2011v24n2p65

Rodrigues

Moura²,

Silva³

et al. 2011

Biotemas

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ResumoOs objetivos desse trabalho foram encontrar alterações na compactação da cromatina dos espermatozóides de galo durante o armazenamento dos mesmos na espermateca das galinhas, observar a duração do período de armazenamento e estimar a variação na quantidade de espermatozóides armazenados nos segmentos cranial, médio e caudal da região da espermateca durante o período estudado. Foram utilizadas 48 matrizes pesadas da linhagem Cobb Avian 48 com 36 semanas de idade. Foi coletado material da junção uterovaginal das fêmeas por 23 dias após a cópula, sendo que, a cada quatro dias, seis fêmeas foram eutanasiadas para confecção de lâminas histológicas da região da espermateca. Foram encontrados espermatozóides por toda a extensão das espermatecas, sendo que esses se concentravam no segmento médio da junção uterovaginal. Não houve diferença estatística VLJQL¿FDWLYD QD TXDQWLGDGH GH HVSHUPDWR]yLGHV SUHVHQWHV QD HVSHUPDWHFD QR GHFRUUHU GRV GLDV GH H[SHULPHQWR Foram observadas grandes quantidades de células espermáticas até o 23º dia de coleta. Portanto, o período de armazenamento de espermatozóides em galinhas é de, no mínimo 23 dias. Palavras-chave: Espermateca, Espermatozóide, Galinha, Galo, Junção uterovaginal AbstractAnalysis of chromatin compaction and determination of the storage time and distribution of a rooster's (Gallus gallus) spermatozoa in the sperm storage tubules of hens. The objectives of this work were to elucidate alterations in the compaction of sperm chromatin during storage in the sperm storage tubules of fowl hens, to observe the storage time, and to estimate the variation in the amount of stored spermatozoa in the cranial, medium and caudal sections of the uterovaginal junction over a period of 23 days. For the analysis of the spermatozoa during storage in the sperm storage tubules of hens, 48 thirty-six-week-old meat chickens of the Cobb Avian 48 strain were used. Samples from the uterovaginal junction of the hens were collected for 23 days after the mating with the roosters, and six hens were euthanized every four days for the production of histological microscope slides. Spermatozoa Biotemas, 24 (2): 65-73, junho de 2011

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Structure of the avian oviduct with emphasis on sperm storage in poultry

Bakst

1998

J. Exp. Zool.

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The macroanatomy, histology, and fine structure of the avian oviduct is reviewed and related to its role in fertile egg production. The avian oviduct functions as a biological assembly line, beginning sequentially with the deposition of the albumen around the fertilized or unfertilized ovum, then the shell membrane, and lastly, the shell, all within 25 hr of ovulation. While in transit through the oviduct, the fertilized ovum progresses to the pre-gastrulation stage of development.

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Distribution of Spermatozoa in the Oviduct and Fertility in Domestic Birds

Cited by 17 publications

References 12 publications

The surprising complexity and diversity of sperm storage structures across Galliformes

The surprising complexity and diversity of sperm storage structures across Galliformes

Análise da compactação da cromatina de espermatozóides de galo (Gallus gallus) e determinação do seu período de armazenamento e distribuição na espermateca de galinhas doi: 10.5007/2175-7925.2011v24n2p65

Structure of the avian oviduct with emphasis on sperm storage in poultry

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