A Study of Aortic Rupture and Performance as Influenced by Selection for Hypertension and Hypotension in the Turkey

Krista, L. M.; Waibel, P. E.; Shoffner, Robert N.; Sautter, J. H.

doi:10.3382/ps.0490405

Cited by 33 publications

(18 citation statements)

References 11 publications

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“…This is 8% greater than the divergence of the previous generation. The males have a higher mean blood pressure than females as reported previously by Krista et al (1970). The means of the hypotensive lines A, B and C are shown on the diagonal of Table 1.…”

Section: Resultssupporting

confidence: 55%

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Strain Crosses Within and Between Lines of Turkeys Selected for High and Low Blood Pressure

et al. 1971

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Section: Resultssupporting

confidence: 55%

“…The parent strains of Broad White turkeys (A, B and C) and the development of the hypertensive lines A', B' and C and hypotensive lines A, B and C were described by Krista et al (1970). These lines comprised the stocks for the high, low and strain crosses.…”

Section: Methodsmentioning

confidence: 99%

Strain Crosses Within and Between Lines of Turkeys Selected for High and Low Blood Pressure

et al. 1971

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“…(1983), using the same line of turkeys, have reported a more severe aortic atherosclerosis in the high blood pressure line. There was no effect of selection for increased or decreased blood pressure on hatchability of fertile eggs, fertility, egg production, or weight gain (Krista, et al, 1970).…”

Section: Introductionmentioning

confidence: 99%

“…As part of this study we also determined the distribution of spermatozoa across size classes. (Krista et al, 1970, ShofFner et al, 1971. A total of 21 male turkeys were used for this study.…”

Section: Introductionmentioning

confidence: 99%

Effects of exercise conditioning on semen characteristics from hyper‐ and hypotensive lines of turkeys

Krista

Pierson

McDANIEL

et al. 1985

British Poultry Science

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Twenty-one male Broad Breasted White turkeys which had been selected for high or low blood pressure were put on an exercise regimen to determine its effect on semen quality. Eleven were from the hypertensive line and 10 from the hypotensive line. Eleven (6 hypertensive and 5 hypotensive) turkeys were placed on an exercise regime of walking (herding) about 1 mile daily for 6 weeks before the experiment began, and then for a further 6 weeks during semen collection. Semen was collected from 11 turkeys on the exercise regime and 10 nonexercised control birds which were kept in their experimental pens during the trial. Both hypertensive and exercised groups showed an improved semen colour score at the first collection period (P less than or equal to 0.09). Only the exercised group showed a significantly (P less than or equal to 0.05) better score than the control group during periods 2 and 3. The hypertensive line showed significantly higher spermatozoa count than the hypotensive line during the first collection period. There was no effect of either exercise or selection for high or low blood pressure on semen volume.

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“…While all the above studies have used several mammalian species as experimental models there is evidence that birds, too, may develop hypertension. In turkeys (13) and chickens (31) hypertensive as well as hypotensive lines are described. In the hypertensive line in turkeys a five times higher incidence of aortic rupture was observed in comparison to the hypotensive *) Supported by the Alexander von Humboldt Foundation line implying a relationship between the level of blood pressure and vascular degenerative processes.…”

Section: Introductionmentioning

confidence: 99%

Blood pressure and arginine vasotocin in normonatremic and hypernatremic ducks

et al. 1985

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As a model to study effects of chronic, excessive salt loading on circulation, Pekin ducks were adapted to 2% saline solution as their sole water supply, while fresh-water-adapted animals were used as controls. Due to the development of salt-eliminating glands, salt-adapted ducks are able to cope indefinitely with this salt stress which means a daily ingestion of 5-6 g NaCl per kg body weight per day, associated with a chronic elevation of plasma osmolality and plasma sodium by 5-8% above normal and an up to 3-fold increase of antidiuretic hormone concentration in comparison to animals maintained on fresh water. Salt loading for up to 14 months did neither increase arterial mean, nor diastolic, nor pulse pressure. On the contrary, arterial mean and diastolic pressure were slightly lower in the salt-adapted than in the fresh-water-adapted animals, while pulse pressure and heart rate did not differ. Circulatory adaptation to removal and reinfusion of 10% of the estimated blood volume was identical in salt-water and fresh-water-adapted ducks. It is concluded that even excessive chronic salt loading resulting in chronic hyperosmolality with high plasma levels of sodium and antidiuretic hormone does not alter hemodynamic adaptation, provided that efficient compensating mechanisms are at the animal's disposal.

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A Study of Aortic Rupture and Performance as Influenced by Selection for Hypertension and Hypotension in the Turkey

Abstract: METHODSThree strains of Broad White turkeys (strains A, B, and C) were used to develop the hypertensive and hypotensive blood 405 at

Cited by 33 publications

References 11 publications

Strain Crosses Within and Between Lines of Turkeys Selected for High and Low Blood Pressure

Strain Crosses Within and Between Lines of Turkeys Selected for High and Low Blood Pressure

Effects of exercise conditioning on semen characteristics from hyper‐ and hypotensive lines of turkeys

Blood pressure and arginine vasotocin in normonatremic and hypernatremic ducks

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