Prolactin Potency of the Cephalic and the Caudal Lobe of the Anterior Pituitary in Relation to Broodiness in the Domestic Fowl

Nakajo, Seiichi; Tanaka, Katuhide

doi:10.3382/ps.0350990

Cited by 31 publications

(4 citation statements)

References 7 publications

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“…The present finding that pituitary prolactin content increases in the incubating hens is consistent with previous studies (Burrows and Byerly 1936;Saeki and Tanabe 1955;Nakajo and Tanaka 1956) in which prolactin content was determined by a bioassay using pigeon crop-sacs. The increased prolactin accumulation in the pituitary gland may be caused by the stimulation of prolactin synthesis when the hen went broody.…”

Section: Discussionsupporting

confidence: 93%

“…It is well established that the concentration of prolactin in broody hens increases in the pituitary gland {Burrows and Byerly 1936; Saeki and Tanabe 1955;Nakajo and Tanaka 1956) and the blood (Sharp, Scanes, Williams, Harvey and Chadwick 1979;Bedrak, Harvey and Chadwick1981;Lea, Dods, Sharp and Chadwick 1981;Shimada, Zadworny, Ishida and Sato 1986) during incubation. A similar increase in the concentration of plasma prolactin has been found in incubating turkeys (Burke and Dennison 1980;Proudman and Opel 1980;Lea and Sharp 1982;Wentworth, Proudman, Opel, Wineland, Zimmermann and Lapp 1983), ducks (Goldsmith and Williams 1980;Hall and Goldsmith 1983), ruffed grouse (Etches, Garbutt and Middleton 1979) and canaries (Goldsmith 1982).…”

Section: Introductionmentioning

confidence: 99%

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Increased Synthesis of Prolactin and Growth Hormone during Incubation in the Pituitary of Broody Nagoya Hens

Hoshino¹,

Wakita²

1989

Horm Metab Res

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Synthesis and release rates of prolactin and growth hormone (GH) in the anterior pituitary of laying and incubating broody chickens (Nagoya breed) were determined by a disc electrophoretic technique after in vitro incubation of anterior pituitaries with a labeled amino acid. Prolactin synthesis and release were two-fold higher in incubating than in laying hens, resulting in twofold increase in the concentration of prolactin in the gland. GH synthesis was three-fold higher in incubating than in laying hens but GH release was not affected by the incubation. GH concentration in the pituitary gland also increased in incubating hens. It is suggested that these changes in hormone synthesis, release, and concentrations are related to nesting behaviour and nutritional condition of incubating hens.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Increased Synthesis of Prolactin and Growth Hormone during Incubation in the Pituitary of Broody Nagoya Hens

Hoshino¹,

Wakita²

1989

Horm Metab Res

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“…Previously, the importance of hormones in the development of broodiness has been studied (Bates, Riddle, & Lahr, 1937;Nakajo & Tanaka, 1956;Nalbandov, Hochhauser, & Dugas, 1945;Saeki & Tanabe, 1955). However, Burrows and Byerly (1938) have shown that the environmental cues of darkness and heat affect the secretion of the hormone prolactin and, in turn, the development of the hen's broody response.…”

Section: Discussionmentioning

confidence: 99%

Maternal behavior in the domestic hen: The role of physical contact.

Maier¹

1963

Journal of Comparative and Physiological Psychology

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In 3 experiments the development of broodiness was studied in relation to restriction of physical contact between hen and chicks. Compared to control Ss, significantly fewer experimental Ss developed broodiness when isolated from physical contact with chicks by confinement in cages adjacent to chicks or above chicks (presumably normal position for brooding) and when contactual ventral surface of Ss was anesthetized to eliminate contact cues. In 3 parallel experiments on the maintenance of broodiness, it was found that Ss do not remain broody as long as control Ss when contact with chicks is eliminated by isolating chicks adjacent to or below Ss or by anesthetizing Ss contactual ventral surface.

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“…Injections of prolactin and/or estrogen caused an increase in mitoses. The cephalic anterior lobe has a higher content of prolactin than the caudal lobe, and this is particularly true in a laying bird or a non-broody bird, but during broodiness there is an increase in the content of prolactin in the caudal lobe, but no changes in the cephalic lobe (Nakajo and Tanaka, 1956). In hens receiving an electrical stimulation of the head (which is known to interrupt broodiness), they observed a decrease in prolactin potency of the caudal lobe.…”

Section: Parathyroids and Estrogen In Regulation Of Blood And Shell Cmentioning

confidence: 93%

A Survey of Recent Advances in Poultry Physiology

Sturkie

1958

Poultry Science

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Prolactin Potency of the Cephalic and the Caudal Lobe of the Anterior Pituitary in Relation to Broodiness in the Domestic Fowl

Cited by 31 publications

References 7 publications

Increased Synthesis of Prolactin and Growth Hormone during Incubation in the Pituitary of Broody Nagoya Hens

Increased Synthesis of Prolactin and Growth Hormone during Incubation in the Pituitary of Broody Nagoya Hens

Maternal behavior in the domestic hen: The role of physical contact.

A Survey of Recent Advances in Poultry Physiology

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