The Fall in Rectal Temperature Seen Before Parturition in Sheep

Ewbank, Roger

doi:10.1530/jrf.0.0190569

Cited by 26 publications

(17 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Lactational anestrus is thought to be due to suppression of hypothalamic-pituitary-ovarian function [27,28]. The phenomenon described herein where the body temperature decreases before parturition, indicates that body temperature measurements can be useful for predicting of parturition, similar to other domestic species [29][30][31][32][33][34]. Of note, this decreased body temperature was not observed in Maggie's second abnormal parturition with a stillborn calf.…”

Section: Pregnancy Period Periparturient Body Temperature and Concenmentioning

confidence: 65%

Study on Reproduction of Captive Marine Mammals

Katsumata

2010

J. Reprod. Dev.

View full text Add to dashboard Cite

Abstract. The reproductive endocrinological characteristics of beluga, killer whale, spotted seal and bottlenose dolphin were evaluated and used in conjunction with applied reproductive research to enhance captive breeding programs. Results from 8 y of biweekly serum progesterone determination in a female beluga indicated that sexual maturity occured at approximately age 13, two to seven estrous cycles, lasting 37 ± 3.9 days, per yr began in April-May every year. Rectal temperature was positively correlated with serum progesterone levels and negatively associated with behavioral estrus. In five cases of pregnancy of two female killer whale, positive relationship was found between serum progesterone concentration and temperature during the first period of 18 month-gestation. In the normal parturitions (n=4), rectal temperature decreased 0.8 C lower than average rectal temperature during pregnancy. Sexual maturity of female killer whales occurred at age nine. Yearly contraception in the mono-estrus captive spotted seals (n=10) using a single dose of the progestagen (proligestone TM ; 5 or 10 mg/kg s.c.) was achieved in 94% (33/35) of the attempts over 5 yr when the hormone was administered two months prior to the breeding season. Artificial insemination trials (n=4) were conducted in female bottlenose dolphin (n=3) using fresh and frozen-thawed semen. Estrus synchronization using regumate (27 days) resulted in ovulation occurring 19 to 24 days post withdrawal. Conception was confirmed in 75% of the attempts, with two females successfully delivering calves. ousing dolphins in Japanese aquariums first began in the1950's, and only recently the era of promoting captive breeding has arrived [1]. Traditional research with marine mammals in Japan has come from post-mortem analysis of animals collected during whaling operations. However, many questions concerning biology and physiology of these animals cannot be learned using these methods. As a result, more emphasis is being placed on using captive animals for non-invasive research programs. Utilizing captive colonies of marine species has been possible to determine growth rates, sexual maturation, breeding period, copulatory behavior, gestation period, labor, parenting, and weaning. The breeding season and the estrous cycle of female bottlenose dolphins [2] were described with endocrine studies of captive animals, and it was found that some delphinids were spontaneous ovulators because ovulation occurred without males [3][4][5]. Analyzing serum progesterone concentrations, early pregnancy diagnosis was established and reproductive performance was improved [6,7]. For the male bottlenose dolphin, the seasonality of spermatogenesis and sperm characteristics were described through analysis of yearly changes in spermatozoa production and testosterone excretion [8][9][10][11]. For pinnipedia, it has been demonstrated that they have a period of delayed implantation, which are regulated by photo period and can be affected by nutritional variations [12,13]. In addition, shortly ...

show abstract

Section: Pregnancy Period Periparturient Body Temperature and Concenmentioning

confidence: 65%

Study on Reproduction of Captive Marine Mammals

Katsumata

2010

J. Reprod. Dev.

View full text Add to dashboard Cite

show abstract

“…A relationship between the ovarian cycle and body temperature has been also reported for several species of marsupials, such as the Tasmanian bettong (Bettongia gaimardi) [9], common wombats (Vombatus ursinus) [10] and marine mammals such as the beluga (Delphinapterus leucas) [11]. Furthermore, in some mammals, such as sheep [12], cattle [8], bottlenose dolphins (Tursiops truncates gilli) [13] and killer whales (Orcinus orca) [14], a decrease in body temperature has been observed from several hours to several days before parturition. Therefore, it may be possible to predict the time of parturition.…”

Section: )mentioning

confidence: 72%

Relationship Between Body Temperature and Ovarian Cycle in Asian and African Elephants

Kusuda

Wakimoto

Sato

et al. 2007

Journal of Reproduction and Development

View full text Add to dashboard Cite

Abstract. The aim of the present study was to investigate whether changes in body temperature are related to the ovarian cycle in elephants. Rectal, tongue or fecal temperature was measured for 2 Asian and 5 African elephants using an electric thermometer. Evaluation of ovarian cycles was based on the changes in serum or fecal progestin. The mean ± SD values of the rectal, tongue, and fecal temperatures were 36.3 ± 0.3 (2 Asian), 36.2 ± 0.5 (1 African) and 36.5 ± 0.3 C (4 African), respectively; the fecal temperature was the highest of the 3 temperatures (P<0.01). The longitudinal changes in body temperatures correlated with the ovarian cycle, with higher temperatures occurring during the luteal phase. The fecal temperatures of one acyclic African elephant did not change cyclically. These results suggest that measurement of body temperature can be used to easily evaluate the ovarian cyclicity of an individual animal, although it might not be able to determine the ovarian cycle length. Key words: Fecal temperature, Ovarian cycle, Progesterone, Rectal temperature, Tongue temperature (J. Reprod. Dev. 53: [1099][1100][1101][1102][1103][1104][1105] 2007) he body temperature and thermoregulatory behavior of the elephant have been studied for many years [1,2]. The methods used to measure the body temperatures of elephants include insertion of a clinical thermometer into the rectum (rectum temperature), insertion of a clinical thermometer into feces immediately after defecation (fecal temperature) and direct measurement of the temperature of urine midstream during urination (urinary temperature) [1,3]. It has been believed that measurement of the urine temperature is suitable for body temperature measurement because a large amount of urine is stored deep within the elephant's body [1]. However, measurement of the fecal temperature is a simple and safe method for large mammals such as the elephant [3]. It has been reported that the fecal temperature well reflects an elephant's rectal temperature and that the values are very similar [1]. The normal range of the rectal temperature of Asian (Elephas maximus) and African elephants (Loxodonta africana) is 36 to 37 C [4,5], and a fever of 38 C is considered significant [5].In female humans and chimpanzees (Pan troglo-

show abstract

“…Body temperature is one indicator that changes during the periods of pregnancy, parturition, and lactation. A drop in body temperature below normal levels before parturition has been observed in several mammals, such as cattle [2,3], sheep [4], dogs [5], and rats [6,7]. Therefore, it may be possible to use body temperature changes before parturition to predict the onset of parturition in other mammal species, and this might be useful in determining when to give obstetrical assistance to increase the offspring survival rate.…”

mentioning

confidence: 99%

Body Temperature and Circulating Progesterone Levels before and after Parturition in Killer Whales (Orcinus orca)

et al. 2006

View full text Add to dashboard Cite

Abstract. Killer whales were used to evaluate peripartum changes and interactions between body temperature and circulating progesterone concentration. Daily body temperature was measured between 0800 h and 0830 h before activity. Body temperature clearly increased during the first phase of pregnancy, and this was followed by a gradual decline until full term. The initial increase was paralleled by circulating levels of progesterone. A decrease in body temperature was first detected on day 5 (p<0.01) before parturition, and body temperature decreased significantly every 2 days until delivery. Five days before delivery, body temperature was 0.3 C lower than the mean value during the pregnancy period, and the decrease was more marked on day 1 before delivery (0.8 C). Serum progesterone levels during pregnancy showed a general pattern of initial rapid elevation (increasing phase), followed by a gradual decline (decreasing phase) throughout the remainder of pregnancy. However, statistically significant correlations between body temperature and progesterone pattern were only found only during the increasing phase. These results suggest that monitoring body temperature variation can be considered valuable for predicting impending parturition in killer whales.

show abstract

The Fall in Rectal Temperature Seen Before Parturition in Sheep

Cited by 26 publications

References 2 publications

Study on Reproduction of Captive Marine Mammals

Study on Reproduction of Captive Marine Mammals

Relationship Between Body Temperature and Ovarian Cycle in Asian and African Elephants

Body Temperature and Circulating Progesterone Levels before and after Parturition in Killer Whales (Orcinus orca)

Contact Info

Product

Resources

About