The role of estrogen and progesterone in the regulation of reproductive behaviour in female ring doves (Streptopelia risoria) under long vs. short photoperiods

1976 ◽  
Vol 54 (9) ◽  
pp. 1409-1422 ◽  
Author(s):  
N. R. Liley
Keyword(s):  
Hormone Treatment ◽  
Reproductive Behaviour ◽  
Egg Laying ◽  
Nest Building ◽  
Short Photoperiod ◽  
Streptopelia Risoria ◽  
Ring Doves ◽  
Long Photoperiod ◽  
Marked Tendency

Female ring doves held under long (16 h per day) or short (8 h per day) photoperiods were treated daily for 15 days with saline, estrogen, or progesterone, alone or in combination. Seven days after the start of hormone therapy females were placed with reproductively active males for 4 h per day for 9 days. There was no difference in egg-laying, courtship, and nest-building by control birds under the two photoregimes.Ovarian follicles remained small in all birds receiving hormone treatment. Oviducts of birds receiving progesterone alone remained small in the short-photoperiod group, but at long photoperiods oviducts became enlarged. Estrogen stimulated oviduct growth at both photoperiods. The combined hormone treatment resulted in considerably greater oviduct development than estrogen alone, and in this case the oviducts of birds under long photoperiod were significantly heavier than those of short-photoperiod birds.Female soliciting and nest-building activity remained low in progesterone-treated females under short photoperiod, but increased rapidly under long photoperiod. Birds treated with estrogen and estrogen and progesterone performed considerable soliciting and nest-building. There was a marked tendency for birds under long-photoperiod conditions to be more active in nest-oriented behaviour. Copulatory behaviour by the female (begging and sexual crouch) occurred infrequently in all hormone-treated birds.

Physiological maturation and reproductive behaviour of female doves (Streptopelia risoria) held under long and short photoperiods

1976 ◽  
Vol 54 (3) ◽  
pp. 343-354 ◽  
Author(s):  
N. R. Liley
Keyword(s):  
Nest Site ◽  
Reproductive Behaviour ◽  
Egg Laying ◽  
Nest Building ◽  
Short Photoperiod ◽  
Courtship Behaviour ◽  
Male And Female ◽  
Streptopelia Risoria ◽  
Long Photoperiod

Female doves were held under long (16 h per day), or short (8 h per day) photoperiod and exposed to actively courting males for 4.5 h per day for 15 days. The occurrence of egg laying and nest building was recorded daily. Behavioural observations were recorded for 15 min on alternate days.Seven out of eight long-photoperiod females laid eggs, whereas only one of nine short-photoperiod females began egg laying. Soliciting by the female and nest building involving male and female are the best indicators of a female's readiness to begin breeding. The occurrence of these activities is correlated with the growth of follicles and oviduct. Copulation and associated behaviours are not correlated with follicle and oviduct growth, and appear to be controlled by factors different from those governing courtship behaviour associated with the nest site.

ROLE OF GONADOTROPHIN RELEASING HORMONES IN THE REPRODUCTIVE BEHAVIOUR OF FEMALE RING DOVES (STREPTOPELIA RISORIA)

1977 ◽  
Vol 74 (1) ◽  
pp. 37-45 ◽  
Author(s):  
MEI-FANG CHENG
Keyword(s):  
Reproductive Behaviour ◽  
Courtship Behaviour ◽  
High Dose ◽  
Thyrotrophin Releasing Hormone ◽  
Releasing Hormone ◽  
Streptopelia Risoria ◽  
Female Behaviour ◽  
Lh Rh ◽  
Lh Releasing Hormone ◽  
Ring Doves

This work was carried out to determine whether gonadotrophin releasing hormone(s) (GnRH) plays a role in the courtship behaviour of female ring doves. In particular, it tests the hypothesis that a high dose of oestrogen suppresses the synergistic action of GnRH with oestrogen which is required to elicit courtship behaviour. The hypothesis was formulated to provide an explanation for a finding in a previous study that ovariectomized ring doves treated with a high dose of oestrogen, paradoxically, failed to show courtship behaviour. In the present study, treatment with synthetic LH releasing hormone (RH) enabled such birds to show typical female behaviour, thus supporting the hypothesis. This LH-RH effect was not apparently mediated by LH or progesterone since treatment with LH or progesterone failed to induce courtship behaviour. In addition, LH-RH can synergise with sub-threshold doses of oestrogen to induce both nest-soliciting and squatting behaviour. This portion of the LH-RH effect complements similar results reported for the rat. Finally, the results of thyrotrophin releasing hormone point to the specificity of LH-RH and the results of an anti-ovulation LH-RH analogue agree with the LH-RH effect.

Effect of pinealectomy on photoperiodic gonadal response of Indian palm squirrel, Funambulus pennanti

1987 ◽  
Vol 65 (4) ◽  
pp. 833-836 ◽  
Author(s):  
C. Haldar-Misra ◽  
M. Srivastava
Keyword(s):  
Pineal Gland ◽  
Experimental Period ◽  
Short Photoperiod ◽  
Gonadal Activity ◽  
Reproductive Axis ◽  
Testicular Regression ◽  
Long Photoperiod

The role of the pineal gland in mediating the effects of photoperiod on the reproductive axis is not well established in tropical mammals. Indian palm squirrels (Funambulus pennanti) were exposed to experimental long (16L:8D) and short (6L:18D) photoperiods. It was observed that the testes regressed in response to short photoperiod, while during the long photoperiod the gonads were active. When squirrels were maintained for a long experimental period (130 days) under the short photoperiodic schedule (6L:18D), gonadal regrowth eventually occurred even though the photoperiod was the same one that initially induced testicular regression. Pinealectomized animals maintained the gonadal activity even in short photoperiod, suggesting that the effect of photoperiod is mediated through the pineal gland.

The role of male nest building in post-mating sexual selection in the monogamous red-necked grebe

Behaviour ◽  
2012 ◽  
Vol 149 (1) ◽  
pp. 81-98 ◽  
Author(s):  
Michał Gąska ◽  
Przemysław Grela ◽  
Janusz Kloskowski
Keyword(s):  
Interspecific Interactions ◽  
Egg Laying ◽  
Nest Building ◽  
Nest Size ◽  
Breeding Cycle ◽  
Nest Construction ◽  
Time Activity ◽  
Relative Contribution ◽  
Podiceps Grisegena

AbstractIn monogamous birds, early male parental effort, such as nest building, may serve as a post-mating sexually-selected display allowing female assessment of male quality. We examined the functional significance of male nest building and the potential role of nest size as a sexually-selected signal in the red-necked grebe ( Podiceps grisegena), a species with high mate fidelity. Time-activity budgets showed that no behaviour was performed exclusively by one sex in the pre-laying period, but males spent significantly more time nest building and were more often involved in aggressive intra- and interspecific interactions. Nest building in pairs attempting a second brood was also performed predominantly by males. Greater participation in nest construction by males allowed females to allocate more time to self-maintenance activities in the period prior to egg-laying. The positive relationship found between the relative contribution of males to nest building and later to brood provisioning indicates that male nest building is an honest indicator of future paternal effort. Males obtained copulations solicited by females proportionally to the time spent on nest building, and the extent of male participation in nest construction was of importance for explaining variation in clutch size. Nest size itself is not very likely to be sexually selected in red-necked grebes, as it was found to depend on nest site conditions such as water depth and exposure to wave action. We suggest that greater investment of males in energetically demanding pre-laying activities is functionally similar to post-mating courtship feeding; it constitutes males’ indirect contribution to clutch production and may help to negotiate the relative investment each sex makes in the different stages of the breeding cycle. The results support the idea that, in monogamous birds, naturally selected male characters related to parental care may evolve into important sexual signals to females, although not into extreme displays.

ROLE OF TESTOSTERONE IN PROGESTERONE-INDUCED INCUBATION BEHAVIOUR IN MALE RING DOVES (STREPTOPELIA RISORIA)

1969 ◽  
Vol 44 (1) ◽  
pp. 13-22 ◽  
Author(s):  
JUDITH M. STERN ◽  
D. S. LEHRMAN
Keyword(s):  
Reproductive Cycle ◽  
Testosterone Propionate ◽  
Male Courtship ◽  
Courtship Display ◽  
Streptopelia Risoria ◽  
Incubation Behaviour ◽  
Ring Doves ◽  
Relationship Of ◽  
Synergistic Relationship

SUMMARY The effectiveness of progesterone (100 μg./day, × 7) in inducing incubation behaviour in male ring doves is markedly diminished by castration. Priming with testosterone propionate (200 μg./day, × 14) restored the effectiveness of progesterone in eliciting this behaviour to the levels in intact males. The synergistic relationship of these two hormones with regard to incubation behaviour contrasts with the inhibition by progesterone of an androgen-dependent male courtship display, the bowing-coo. The behavioural changes observed after these endocrine treatments are fully consistent with the normal sequence of changes in behaviour characterizing the transition from the courtship phase to the incubation phase of the reproductive cycle.

Maintenance and reproductive behaviour in the freshwatre prawn Macrobrachium australiense Holthuis (Crustacea : Decapoda : Palaemonidae)

1982 ◽  
Vol 33 (4) ◽  
pp. 629 ◽  
Author(s):  
CL Lee ◽  
DR Fielder
Keyword(s):  
Reproductive Behaviour ◽  
Egg Laying ◽  
Nest Building ◽  
Successful Mating ◽  
Food Search ◽  
Alarm Reaction ◽  
Maintenance Behaviour

Seven categories of maintenance behaviour have been recognized and described for M. australiense. These are 'normal stance', 'body cleaning', 'locomotion', 'food search and feeding', 'defaecation'. 'alarm reaction', and 'moulting'. These behaviour patterns are compared with similar patterns described previously for other caridean prawns. Behaviour patterns leading to successful mating in M. australiense include 'courtship and nest building', 'copulation', and 'egg-laying'. Ripe females seek out dominant males, which then build a nest. The male protects the female in the nest during pro-ecdysis and the pair copulate after the female moults. Eggs are usually laid within 12 h of copulation.

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