scholarly journals The continuation years of breeding pair and the example of divorce and remating of Gray-headed Lapwing

2018 ◽  
Vol 30 (2) ◽  
pp. 71-79
Author(s):  
Tatsuhiko KAWACHI
Keyword(s):  
Breeding Pair

scholarly journals Preparing for battle? Potential intergroup conflict promotes current intragroup affiliation

2010 ◽  
Vol 7 (1) ◽  
pp. 26-29 ◽  
Author(s):  
Andrew N. Radford
Keyword(s):  
Group Dynamics ◽  
Intergroup Conflict ◽  
Breeding Pair ◽  
Simple Consequence ◽  
Future Planning ◽  
Social Contracts ◽  
Evolution Of Sociality ◽  
Cooperatively Breeding ◽  
Intergroup Conflicts ◽  
Agonistic Support

Groups of human soldiers increase their affiliative behaviour when moving into combat zones. Despite numerous other species also competing as groups, little is known about how potential intergroup conflict might influence current intragroup affiliative behaviour in non-human animals. Here, I show that allopreening (when one individual preens another) increases in groups of cooperatively breeding green woodhoopoes ( Phoeniculus purpureus ) when they enter areas where conflicts with neighbours are more likely. Self-preening, which is an indicator of stress in other species, did not increase in conflict areas, suggesting that the change in affiliative behaviour is not the simple consequence of greater stress. Instead, because it is the dominant breeding pair that increase their preening of subordinate helpers, it is possible that current affiliative behaviour is being exchanged for agonistic support in any intergroup conflicts that might ensue. These results are important for our understanding of group dynamics, cooperation and the evolution of sociality, but also bring to mind the intriguing possibilities of social contracts and future planning in birds.

scholarly journals Breeding site fidelity, and breeding pair infidelity in the endangered Carnaby’s Cockatoo Calyptorhynchus latirostris

2018 ◽  
Vol 27 ◽  
pp. 59-74 ◽  
Author(s):  
Denis A. Saunders ◽  
Nicole E. White ◽  
Rick Dawson ◽  
Peter R. M. Mawson
Keyword(s):  
Western Australia ◽  
Site Fidelity ◽  
Breeding Site ◽  
Breeding Population ◽  
Breeding Pair ◽  
Breeding Attempt ◽  
The Stability

The ecology and behaviour of the endangered Carnaby’s Cockatoo Calyptorhynchuslatirostris have been studied in detail at Coomallo Creek in the northern wheatbelt of Western Australia from 1969 until the present. Results of research on this breeding population conducted on individually marked birds from 1970 to 1990 were compared with results from analyses of DNA taken from nestlings in the study area from 2003, 2005, and each year from 2009 to 2013. Analyses of DNA confirmed earlier findings about the stability of adult breeding pairs, and that females used the same breeding hollow they used previously, provided the hollow was not occupied when they returned to breed. When moving to another hollow, they chose a hollow in the same vicinity of the previous hollow. Analyses in 22 cases where DNA was obtained from both nestlings of a breeding attempt revealed that in six (27.3%) cases, the second egg was fertilised by a male not paired with the female. These extra-pair copulations were not suspected during the earlier study based on observations of individually marked birds.

scholarly journals Parental care in the buffy-tufted-ear marmoset (Callithrix aurita) in wild and captive groups

2000 ◽  
Vol 60 (4) ◽  
pp. 667-672 ◽  
Author(s):  
C. V. SANTOS ◽  
M. M. MARTINS
Keyword(s):  
Parental Care ◽  
Breeding Pair ◽  
Energetic Cost ◽  
Environmental Pressures ◽  
Infant Carrying ◽  
Captive Group ◽  
In Captivity ◽  
In The Wild ◽  
Wild Group ◽  
Callithrix Aurita

Studies on cooperative care of offspring in callitrichid primates are biased in favor of observations in captivity. In the wild, however, individuals have to deal with environmental pressures, which may influence their social behavior. We compared the individual effort attributed to parental care offered by members of a wild group (couple, plus a subadult helper) and two captive groups (A: couple, plus an subadult helper, B: couple, plus four adult helpers) of the buffy-tufted-ear marmoset, Callithrix aurita, from weeks 1-12 after the infants' birth. The carrier (breeding male and female or helper) and the infant's feeding (food sharing and foraging for food) were recorded. Up to week four, while the wild breeding pair shared infant carrying at similar proportions, the male from captive group A carried 100% of the time. Adult helpers from group B were the main carriers. Carrying behavior extended up to week 12 only in the wild group. Food provisioning to the infant was observed earlier in the groups wild and A, but general proportion of feeding records was lower in the wild than in captivity. Energetic cost of travelling and searching for food may be associated with equal division of carrying behavior by the wild breeding pair. Higher proportions of carrying in the groups wild and B may have delayed the development of the infants' motor skills required in foraging. Our data agree with previous studies: the father's lower investment in carrying when adult helpers are present and lower contribution of subadult non-reproductive members.

Evaluation of Indicated Breeding Pair Criteria to Estimate Mallard Breeding Populations

2002 ◽  
Vol 66 (4) ◽  
pp. 985 ◽  
Author(s):  
Michael G. Brasher ◽  
Richard M. Kaminski ◽  
L. Wes Burger
Keyword(s):  
Breeding Pair ◽  
Breeding Populations

scholarly journals The Current Northernmost Breeding Pair of the California Gnatcatcher

Western Birds ◽  
2019 ◽  
Vol 50 (3) ◽  
pp. 188-193
Author(s):  
Michael C. Couffer
Keyword(s):  
Breeding Pair

scholarly journals Records of breeding in Wilson’s Plover Charadrius wilsonia with new localities for Brazil

2020 ◽  
Vol 80 (1) ◽  
pp. 81-86
Author(s):  
L. P. Andrade ◽  
R. M. Lyra-Neves ◽  
H. M. L. S. Andrade ◽  
U. P. Albuquerque ◽  
A. J. S. Siqueira ◽  
...  
Keyword(s):  
First Record ◽  
Coastal Areas ◽  
Northeastern Brazil ◽  
Breeding Pair ◽  
Domestic Cats ◽  
New Localities ◽  
Charadrius Wilsonia

Abstract Wilson’s Plover, Charadrius wilsonia, is widely distributed in coastal areas of the Americas. This report presents the first record of breeding in this species on Coroa do Avião Island, on the coast of Pernambuco, and in the estuary of the Cardoso and Camurupim rivers, on the coast of Piauí, in northeastern Brazil, extending the known area of reproduction of this species in this region. One breeding pair was observed on October 29th 2014 on Coroa do Avião Island, and a second pair was recorded on April 6th 2016 in the Cardoso/Camurupim estuary on the Piauí coast. Both the male and the female contributed to the incubation of the eggs. The nest on Coroa do Avião island was camouflaged by the local vegetation, but despite this, the eggs were attacked by a predator. Possible predators observed on the island included Caracara plancus and domestic cats and dogs.

Clutch parameters and reproductive success of a translocated population of red-crowned parakeet (Cyanoramphus novaezelandiae)

2008 ◽  
Vol 56 (6) ◽  
pp. 389 ◽  
Author(s):  
Luis Ortiz-Catedral ◽  
Dianne H. Brunton
Keyword(s):  
Reproductive Success ◽  
Clutch Size ◽  
Brood Size ◽  
Reproductive Output ◽  
Hatching Success ◽  
Natural Populations ◽  
Reproductive Potential ◽  
Breeding Pair ◽  
Brood Rearing ◽  
Breeding Seasons

At least four populations of the red-crowned parakeet (Cyanoramphus novaezelandiae) have been established via translocation within New Zealand over the last 40 years, but reproductive parameters of these populations have not been documented. We quantified differences in clutch parameters and reproductive success for a translocated population of this species on Tiritiri Matangi Island over two breeding seasons. Overall clutch parameters and estimates of reproductive success were consistent with reported values from natural populations. However, we found previously unreported differences in clutch size, hatching success and brood size between breeding seasons. The number of fledglings produced per breeding pair increased significantly from 1.4 to 3.4 fledglings during our two-year study. In contrast, egg volume and fertility per clutch did not vary during the same period. Overall, 7 eggs were laid per breeding pair but only 2.22 nestlings fledged, representing a 63.8% loss of initial reproductive potential. Losses during the incubation stage were caused by partial and total hatching failure, whereas starvation of nestlings caused all losses during the brood-rearing stage. Hatching success during our study was lower than that reported for wild populations of this and other parrot species, and remained lower even during the most productive breeding season. We found no cases of predation on eggs or nestlings during our study despite the presence of native and exotic avian predators on Tiritiri Matangi Island. We show that clutch size, brood size and changes in loss between breeding seasons are determinants of reproductive output in translocated red-crowned parakeet and also that reproductive output can vary greatly between breeding seasons. Finally, if reduced hatching success is the result of small founder size, management of parakeets should consider the movement of larger and more genetically diverse flocks.

Sign in / Sign up

Export Citation Format

Share Document