Relationship between Neuroendocrine Mechanisms Controlling Sexual Behaviour and Ovulation in Primates

2015 ◽  
pp. 286-293
Author(s):  
J. Herbert
Keyword(s):  
Sexual Behaviour ◽  
Neuroendocrine Mechanisms

scholarly journals Study of copulatory behaviour in old male rabbits

2021 ◽  
Vol 29 (1) ◽  
pp. 41
Author(s):  
Pedro Jiménez ◽  
Evelia Cuamatzi ◽  
Gabriela González-Mariscal
Keyword(s):  
Sexual Behaviour ◽  
Scent Marking ◽  
Lower Number ◽  
Test Duration ◽  
Male Rabbit ◽  
Young Males ◽  
Young Females ◽  
Neuroendocrine Mechanisms ◽  
B Test ◽  
Copulatory Behaviour

<p>Male rabbit sexual behaviour consists of a single mount followed immediately by ejaculation. In young bucks this pattern changes gradually as they reach sexual satiety in a day and sexual exhaustion after several daily tests. Little is known about the characteristics of sexual behaviour in old rabbits (aged 48-54 mo) within a day and across daily tests leading to sexual exhaustion. By using sexually receptive(young) females, changed within a session to maximise copulation, we found that: a) the inter-ejaculatory interval increased between the first and last days of testing; b) test duration was 3.1 h on day 1 and 0.5 h on day 15; c) the “miss rate” (i.e., mounts not accompanied by ejaculation) significantly increased from the first to the last day of testing, regardless of when this occurred in each individual buck; d) the total number of ejaculations displayed in a session significantly decreased between the first and the last day of testing in all males; e) scent-marking (“chinning”) frequency significantly decreased after copulation to satiety, relative to that quantified at baseline, and was restored the following day. Compared with young bucks our results indicate quantitative, rather than qualitative, differences in sexual behaviour associated with age in rabbits. Specifically, on day 1 old bucks spent a shorter time engaged in copulation and displayed a lower number of ejaculations before reaching satiety than young males. In contrast, the interval between ejaculatory events and the “miss rate” increased across test days in both old and young rabbits. These results merit investigating the neuroendocrine mechanisms underlying the display of such an active sexual behaviour by old rabbit bucks.</p>

The evolution of neuroendocrine mechanisms regulating sexual behaviour in female primates

2001 ◽  
Vol 13 (8) ◽  
pp. 599 ◽  
Author(s):  
Alan Dixson
Keyword(s):  
Sexual Behaviour ◽  
Extended Family ◽  
Neuronal Cell ◽  
Common Marmoset ◽  
Neuronal Cell Body ◽  
Sexual Receptivity ◽  
Intact Female ◽  
Neuroendocrine Mechanisms ◽  
Ovulatory Period ◽  
Marked Suppression

The common marmoset is a small New World primate that lives in extended family groups. Female marmosets show rhythmic changes in proceptivity during their 28-Day ovarian cycle, but fluctuations in sexual receptivity are relatively subtle. Receptivity persists even after ovariectomy and adrenalectomy in the female marmoset. In the intact female, increases in proceptivity at mid cycle are due to the activational effects of oestradiol. Treatment of the ovariectomized female with oestradiol-17β&lsquor; stimulates proceptivity and this effect is blocked by thermal or excitotoxic (neuronal cell body specific) lesions in the anterior or medial hypothalamus. Implantation of oestradiol into the anterior hypothalamus (via guide cannulae) also activates proceptivity. Luteinizing hormone releasing hormone (LHRH) may also form part of the neuroendocrine mechanism controlling proceptivity in the intact female, given that exogenous LHRH stimulates proceptivity in ovariectomized, oestrogen-primed marmosets. These effects of oestradiol (and LHRH) on proceptive displays are much more pronounced than any effects involving sexual receptivity. Conversely, treatment of the ovariectomized female with progesterone, at doses sufficient to produce luteal phase concentrations of circulating hormone, causes a marked suppression of proceptivity, but only small decreases in sexual receptivity. These experiments on marmosets remain some of the very few studies to define how hormones influence the brain and sexual behaviour in female primates. They support the conclusion that sexual receptivity is not under rigid neuroendocrine control in female anthropoids, and that there is no peri-ovulatory period of oestrus, such as occurs in most non-primate mammals.

EFFECT OF NICOTINE ON SEXUAL BEHAVIOUR OF MUTANT STRAIN (CURLED) OF DROSOPHILLA MELANOGASTER

2018 ◽  
Vol 24 (1) ◽  
Author(s):  
SHAMIM AKHTER CHOUDHARY
Keyword(s):  
Mutant Strain ◽  
Sexual Behaviour ◽  
Virgin Female ◽  
P Value ◽  
Pooled Data ◽  
Mating Latency ◽  
Males And Females ◽  
Food Medium ◽  
Food Media ◽  
Dose Dependent

In the present study, an attempt was made to study the effect of plant extract on Sexual behaviour of Mutant Strain (Curled) of Drosophila melanogaster. The LC50 has been estimated with 1% of the food media. The virgin females and males were isolated and fed with normal food media for three days. Then sub-lethal concentrations of 0.625 μl / 100 ml food, 1.2 μl /100 ml food, 2.5μl /100 / food of nicotine were mixed in food medium and allowed in flies to feed for two days. Then appropriate combination of untreated / treated males and females were introduced into the mating chamber. Courtship latency, mating latency and copulation duration were studied. After observation of the behaviour, mated flies were allowed to produce progeny. The sexual behaviour of bachelor male and virgin female obtained in the progeny was also studied. The pooled data were analyzed by student t-test and the result indicates p-value significant at 0.05 levels. The courtship latency was affected by in treatment but it is neither dose dependent nor sex dependent.

HEMMUNG VON TESTOSTERONABHÄNGIGEN DIFFERENZIERUNGSVORGÄNGEN DER MÄNNLICHEN RATTE NACH DER GEBURT

1967 ◽  
Vol 54 (2) ◽  
pp. 227-240 ◽  
Author(s):  
F. Neumann ◽  
J. D. Hahn ◽  
M. Kramer
Keyword(s):  
Sexual Behaviour ◽  
Cyproterone Acetate ◽  
Post Partum ◽  
Sexual Attitude ◽  
Normal Male ◽  
Corpora Lutea ◽  
List Type ◽  
Newborn Rats ◽  
Neonatal Treatment ◽  
Triangular Shape

ABSTRACT Male newborn rats were injected with 2 mg of an antiandrogen (1,2α-methylene-6-chloro-pregna-4,6-dien-17α-ol-3,20-dione-17α-acetate = cyproterone acetate) daily from their 1st to their 14th day of life. The following effects of this treatment were observed in these animals after onset of sexual maturity: 84% of the animals are unable to reproduce. Penis: the frenulum is broadened to a lamina of triangular shape, which almost completely prevents the preputium from being pushed back. These males show a rather insufficient male sexual behaviour towards females in oestrus. After castration and ovar implantation, some of the treated animals show true corpora lutea and at attempts of cohabitation partially female sexual behaviour towards normal male animals. From these results it can be concluded, that differentiation of the penis is not completed at the time of birth. The infertility of the animals may be caused by the penile changes (difficulties with intromission) as well as by the aimless sexual behaviour. This aimless sexual behaviour, the ability to produce true corpora lutea and finally their partially female sexual attitude under the influence of the hormones from the implanted ovaries led to the conclusion, that the above described neonatal treatment apparently inhibited testosterone-depending post partum developments of sexual differentiation in hypothalamic centers.

Oxytocin modulates olfaction-related behaviour and essential for onset of sexual behaviour in both sexes of mice

2013 ◽  
Author(s):  
Sunil Dhungel ◽  
Dilip Rai ◽  
Katsuhiko Nishimori ◽  
Yasuhiko Kondo ◽  
Yasuo Sakuma
Keyword(s):  
Sexual Behaviour
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