Long-term Pair Bonds in the Laysan Duck

2009 ◽  
Vol 121 (1) ◽  
pp. 187-190 ◽  
Author(s):  
Michelle H. Reynolds ◽  
James H. Breeden ◽  
Mark S. Vekasy ◽  
Tana M. Ellis
Keyword(s):  
Pair Bonds ◽  
Term Pair

scholarly journals Mate Attentiveness, Seasonal Timing of Breeding and Long-term Pair Bonding in the House Finch (Carpodacus mexicanus)

Behaviour ◽  
2004 ◽  
Vol 141 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Geoffrey Hill ◽  
Kevin McGraw
Keyword(s):  
Pair Bond ◽  
Egg Laying ◽  
Carpodacus Mexicanus ◽  
Timing Of Breeding ◽  
Pair Bonding ◽  
House Finches ◽  
Breeding Date ◽  
Pair Bonds ◽  
Term Pair

AbstractIn seasonally breeding birds, natural selection favors individuals that begin breeding earlier in a year because they produce more or higher quality offspring than those that begin breeding later. Among the factors that influence the timing of breeding, which include the age, health, competitive ability, or mate quality of individuals, is the longevity of the pair bond, with birds that remain mated across years initiating breeding earlier in the season than newly formed pairs. The behavioural interactions between pair members that may facilitate long-term pair bonding and early breeding onset have infrequently been studied, however. Here we report the relationship between male-female affiliative behaviour, pair-bond duration, and breeding date in house finches (Carpodacus mexicanus), a short-lived, socially monogamous passerine species in which the duration of pair bonds is highly variable within and among seasons. Finches that initiated breeding earliest in the season were those that had bred with one another in previous years. Early breeding males from returning pairs maintained significantly closer contact with their mate during the first egg-laying period of the year than did males from late-breeding, newly formed pairs. Similarly, early-breeding females from returning pairs followed their mate more closely in nest-vicinity flights during the fertile period than females from late-breeding, newly formed pairs. These results suggest that attributes of and interactions between both pair members may help to maintain stable breeding pairs and influence the timing of breeding in seasonally nesting, short-lived songbirds. Rather than advertising for or seeking extra-pair fertilization opportunities, high-quality pairs of finches may invest heavily in their mate to secure the pair bond and ensure high intrapair reproductive success.

The coevolution of long-term pair bonds and cooperation

2013 ◽  
Vol 26 (5) ◽  
pp. 963-970 ◽  
Author(s):  
Z. Song ◽  
M. W. Feldman
Keyword(s):  
Pair Bonds ◽  
Term Pair

Monogamous Mating System in the Hill Mynah Gracula Religiosa: The Role of Female–Female Aggression

2017 ◽  
Vol 10 (3) ◽  
pp. 134-138 ◽  
Author(s):  
Manee Archawaranon
Keyword(s):  
Female Aggression ◽  
Breeding Pair ◽  
Pair Bonding ◽  
Pair Bonds ◽  
Term Pair ◽  
Males And Females ◽  
Breeding Seasons ◽  
The Hill

This study aimed to discover whether the Hill Mynah Gracula religiosa forms pairs for a single breeding season or engages in long-term pair bonding, and to investigate the role of female aggression in maintaining pair bonds. Experiments were conducted on captive birds in Thailand between 2006 and 2013, and pair behaviours such as allopreening and aggression were observed four times every day. In the first experiment, when each breeding pair was preparing to rear a new clutch, pairs were placed in a new aviary with unfamiliar males and females with which they could potentially form relationships. Results indicated that breeding pairs stayed with the same mates over four continuous breeding seasons (2006–2009) without changing partners or taking additional mates. In a second experiment, the role of female aggression in maintaining long-term pair bonding was examined. Each breeding pair, when preparing to rear a new clutch, was placed in a new aviary with three unfamiliar females. The results showed that female breeders displayed vigorous aggression towards the other three females, forcing them to retreat from the pair; this behaviour was sustained over four continuous breeding seasons (2010–2013). Thus, it is suggested that the Hill Mynah engages in long-term pair bonding and that the aggression of the breeding female is an essential component in the maintenance of pair-bonds.

Women would like their Partners to be more Synchronized with them in their Sleep-Wake Rhythm

2014 ◽  
Vol 17 ◽  
Author(s):  
Christoph Randler ◽  
Selina Barrenstein ◽  
Christian Vollmer ◽  
Juan Francisco Díaz-Morales ◽  
Konrad S. Jankowski
Keyword(s):  
Sexual Dimorphism ◽  
Assortative Mating ◽  
Sleep Onset ◽  
Pair Bonds ◽  
Term Pair ◽  
The Difference ◽  
Ideal Partners

AbstractMen sleep shorter and go to bed and get up later than women, thus they are later chronotypes. This difference between the sexes is most pronounced between puberty and menopause indicating the possibility that morningness is subject to sexual dimorphism related to reproductive aspects. The objective of the study was to compare the sleep-wake behavior of women with their actual partners and with their preferred partners. As a hypothesis, we expect some assortment in mating concerning chronotype (with the actual partner), but we also expect a higher synchronization with a preferred ideal partner. 167 women were analyzed in this study (mean age: 23.0 ± 2.57 (SD) years). Mated women were earlier chronotypes than their partners (t= –2.051,p= .042,d= .34) but the difference was small (11:02 min ± 1:04 min). The results of the present study showed women preferring a partner synchronized to their own sleep-wake-rhythm more than their actual partners were. The above result was true either for single facets of the sleep-wake rhythm (e.g. bed time, sleep onset) or for midpoint of sleep on free days – an indicator of actual chronotype: women’s and their partners’ correlation of midpoint of sleep was lower (r= .513) than women’s and their ideal partners’ correlation (r= .855). Amongst various sleep-wake measures, women particularly preferred a partner going to bed at the same time. Assortative mating according to sleep-wake rhythm exists, but women for long-term pair-bonds would like their partners far more synchronized.

scholarly journals Extra-Pair Fertilizations in Sandhill Cranes Revealed Using Microsatellite DNA Markers

The Condor ◽  
2006 ◽  
Vol 108 (4) ◽  
pp. 970-976
Author(s):  
Matthew A. Hayes ◽  
Hugh B. Britten ◽  
Jeb A. Barzen
Keyword(s):  
Dna Markers ◽  
Microsatellite Dna ◽  
Breeding Population ◽  
Grus Canadensis ◽  
Pair Bonds ◽  
The Social ◽  
Microsatellite Dna Markers ◽  
Term Pair ◽  
Sandhill Cranes

AbstractAbstractThe presence of extra-pair fertilizations (EPF) in a dense breeding population of Sandhill Cranes (Grus canadensis) was examined using six microsatellite DNA markers. In this long-lived species that maintains long-term pair bonds, 4.4%–11% of 45 chicks were not genetically related to one social parent, and extra-pair chicks were present in 5.6%–22% of 18 family groups. Two confirmed extra-pair chicks were from different broods of the same pair that was socially bonded for a minimum of 12 years. The social male was rejected as the genetic father of both of these chicks. Three other potential cases of EPF (two cases in which the social male was rejected as the genetic parent, one in which the social female was rejected) could also have resulted from mate replacement prior to sampling. The range of EPF in this population of Sandhill Cranes is similar to that of other species with similar mating systems. In the confirmed cases of EPF, the female was able to increase her individual reproductive success without losing her territory.

scholarly journals Long-Term Pair Bonds in Harlequin Ducks

The Condor ◽  
2000 ◽  
Vol 102 (1) ◽  
pp. 201-205 ◽  
Author(s):  
Cyndi M. Smith ◽  
Fred Cooke ◽  
Gregory J. Robertson ◽  
R. Ian Goudie ◽  
W. Sean Boyd
Keyword(s):  
British Columbia ◽  
Breeding Site ◽  
Histrionicus Histrionicus ◽  
Pair Bonds ◽  
Previous Season ◽  
Harlequin Ducks ◽  
Term Pair ◽  
Wintering Area

Abstract We documented the frequency of pair reunion in Harlequin Ducks (Histrionicus histrionicus) on breeding streams in Alberta, and at a molting/wintering area in southwestern British Columbia. As long as their mate is alive, Harlequin Duck pairs reunite on the wintering area and return to the breeding stream together. Pairs reunite even if the female is unsuccessful at breeding the previous season, which suggests that reuniting with the same mate year after year is important. Some males that have lost their mate and fail to re-pair on the wintering area show fidelity to their former breeding site.

Further Evidence of Long-Term Pair Bonds in Ducks of the Genus Bucephala

The Auk ◽  
1987 ◽  
Vol 104 (3) ◽  
pp. 521-522 ◽  
Author(s):  
Gilles Gauthier
Keyword(s):  
Pair Bonds ◽  
Term Pair

Sexual Roles in the Dot-Winged Antwren (Microrhopias quixensis), a Tropical Forest Passerine

The Auk ◽  
1983 ◽  
Vol 100 (4) ◽  
pp. 920-925 ◽  
Author(s):  
Russell Greenberg ◽  
Judy Gradwohl
Keyword(s):  
Egg Production ◽  
Prey Type ◽  
Sexual Roles ◽  
Pair Bonds ◽  
Nestling Period ◽  
Term Pair ◽  
Foraging Ability ◽  
Maintenance Behavior

Abstract Dot-winged Antwrens maintain long-term pair bonds on year-long territories in tropical forests and woodland of Central and South America. Pairs partition breeding-related activities nearly equally. Like other antbirds (Formicariidae), both sexes incubate and brood. Both sexes participate equally in territorial maintenance behavior, which primarily involves active border displays. Initial investment in offspring is possibly equalized by long-term nuptial feeding of females by males. Overall, both sexes contribute equally to nestling care, although considerable variation is observed between nests, much of which probably results from variation in the foraging ability of parents. Females feed young consistently less often than do males during the early part of the nestling period and may be recovering from depletion of reserves resulting from egg production. In most pairs females bring more spiders than do males. This difference in prey type is unexpected, because the pair forages close together in the same microhabitat and their bill size is similar. Pairs are distinct in their interactions: some pairs have a rigid feeding order, and others do not.

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