Breeding Seasons and Migration

Marshall, A. J.

doi:10.1016/b978-1-4832-3143-3.50016-2

Cited by 62 publications

(25 citation statements)

References 96 publications

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“…Environmental extremes cause stress and interfere with reproduction (Marshall, 1961a;Mirande et al, 1997;Gee, 1995). In nondomestic birds, stress causes birds to stop laying eggs, to break eggs, and to kill chicks.…”

Section: Environmentmentioning

confidence: 98%

See 1 more Smart Citation

Reproduction in Nondomestic Birds: Physiology, Semen Collection, Artificial Insemination and Cryopreservation

Gee¹,

Bertschinger²,

Donoghue³

et al. 2004

Avian & Poul. Biolog. Rev.

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Pioneering work by Quinn and Burrows in the late 1930s led to successful artificial insemination (AI) programs in the domestic poultry industry. A variety of species specific modifications to the Quinn and Burrows massage technique made AI possible in nondomestic birds. Massage semen collection and insemination techniques span the entire range of species from sparrows to ostriches. Also, cooperative semen collection and electroejaculation have found limited use in some nondomestic species.Artificial insemination produces good fertility, often exceeding fertility levels in naturally copulating populations. However, aviculturists should explore other ways to improve fertility before resorting to AI. Artificial insemination is labor intensive and may pose risks to nondomestic birds as well as handlers associated with capture and insemination.Semen collection and AI makes semen cryopreservation and germ plasma preservation possible. Yet, semen cryopreservation techniques need improvement before fertility with frozen-thawed semen will equal fertility from AI with fresh semen.

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Section: Environmentmentioning

confidence: 98%

“…Changes in the environmental conditions (like photoperiod, temperature, and humidity) can have major impacts on reproductive condition (Marshall, 1961a;. Breeding birds transported between southern and northern hemispheres show inappropriate breeding responses and may take years to adapt to new environments (Lofts et al, 1971;Flieg, 1974).…”

Section: Seasonmentioning

confidence: 98%

Reproduction in Nondomestic Birds: Physiology, Semen Collection, Artificial Insemination and Cryopreservation

Gee¹,

Bertschinger²,

Donoghue³

et al. 2004

Avian & Poul. Biolog. Rev.

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“…1, Figs 2 and 3). Such testes also show the presence of lipid-sensitive material within the seminiferous tubules, which is indicative of a post-breeding condition in birds (Marshall, 1961;Lofts & Murtón, 1968) and reptiles (Lofts, Phillips & Tam, 1966).…”

Section: Discussionmentioning

confidence: 97%

“…Lipids are normally found in the testis at all stages of the spermatogenic cycle (Johnson, 1970), but the presence of massive quantities of lipids within the seminiferous tubules of birds has generally been accepted to indicate cessation of reproductive activity and the start of the photo-refractory period (Marshall, 1961;Lofts & Murtón, 1968). Tubular lipids are known to increase in abun¬ dance if spermatogenesis is impaired (Johnson, 1970), or parts of the testis become devoid of spermatozoa and testicular fluids (Turner & Johnson, 1971).…”

Section: Discussionmentioning

confidence: 98%

Spermiation and Sperm Transport in Passerine Birds

MIDDLETON

1974

Reproduction

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The testes and seminal sacs of thirty European goldfinches and twenty-one canaries collected from specific nests at known phases of the nest cycle were histologically examined. Although no relationship between a characteristic stage of gonadal development and a specific phase of the nest cycle could be established, the histological findings suggested a relationship between the functioning of the seminal sac and the process of spermiation. The histological results are reported and a hypothetical mechanism for spermiation and sperm transport in passerine birds is described.

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“…A similar phenomenon has been also recorded in some snakes (Lofts et al 1966) and in common frogs (Rana temporaria) (Lofts, 1965). Marshall (1961) suggests that the sequence is part of an endogenous rhythm that can occur even in the absence of any gonadotropic rhythm. Thus, even after complete removal of the adenohypothysis, Coombs and Marshall (1956) have reported that the interstitial cells of the domestic cockerels still renew themselves and develop a new generation of Leydig cells with some lipoidal and cholesterol-positive material.…”

Section: Resultsmentioning

confidence: 99%

Seasonal cycle of leydig cells in the Japanese Jungle Crow (Corvus macrorhynchos)

Islam

Aoyama

Sugita

2015

Asian J. Med. Biol. Res

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Abstract:The investigation was conducted to elucidate seasonal histomorphological changes of Leydig cells in Japanese Jungle crows (Corvus macrorhynchos). All adult crows (n=12) were killed for H&E staining. Histologic data of Leydig cells regarding their locations in the interstitium, appearance and disappearance of lipoidal materials in their cytoplasm, precursor cells and fibroblasts are studied. In the nonbreeding season, in the interstitium, clusters of Leydig cells were found in abundant number. They looked foamy, white and easily visible. Their nuclei were found small and are located eccentrically. During recrudescence, the Leydig cell became less foamy and less white. In peak breeding season, the Leydig cells showed bigger in size and the nuclei became prominent. Cytoplasmic lipoidal material was lowest and cytoplasm was found dense pink.

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Breeding Seasons and Migration

Cited by 62 publications

References 96 publications

Reproduction in Nondomestic Birds: Physiology, Semen Collection, Artificial Insemination and Cryopreservation

Reproduction in Nondomestic Birds: Physiology, Semen Collection, Artificial Insemination and Cryopreservation

Spermiation and Sperm Transport in Passerine Birds

Seasonal cycle of leydig cells in the Japanese Jungle Crow (Corvus macrorhynchos)

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