Every-Other-Day Clutch-Initiation Synchrony In Ring-Billed Gulls (Larus Delawarensis)

2016 ◽  
Vol 128 (4) ◽  
pp. 760-765 ◽  
Author(s):  
Amanda G. Sandler ◽  
Libby C. Megna ◽  
James L. Hayward ◽  
Shandelle M. Henson ◽  
Cynthia M. Tkachuck ◽  
...  
Keyword(s):  
Larus Delawarensis ◽  
Clutch Initiation

Development of temperature regulation in young birds: evidence for a vocal regulatory mechanism in two species of gulls (Laridae)

1994 ◽  
Vol 72 (3) ◽  
pp. 427-432 ◽  
Author(s):  
Myra O. Wiebe ◽  
Roger M. Evans
Keyword(s):  
Body Temperature ◽  
Temperature Regulation ◽  
Regulatory Mechanism ◽  
Mammalian Species ◽  
Larus Argentatus ◽  
Herring Gulls ◽  
Stage Of Development ◽  
Larus Delawarensis ◽  
Regulate Body Temperature

Endothermic thermoregulation is absent in birds until after hatching, and usually requires several hours or days to become fully functional in the young. Cold-induced vocalizations that elicit brooding by a cooperative parent or surrogate constitute an additional thermoregulatory mechanism potentially available to neonates of some avian and probably some mammalian species. We show that newly hatched ring-billed gulls (Larus delawarensis) and herring gulls (Larus argentatus) exposed in the laboratory to moderate chilling (20 °C) had a significantly improved ability to regulate body temperature when rewarmed (34 °C) for brief, 4-min periods in response to cold-induced vocalizations. Spontaneous calling by unchilled yoked controls was ineffective in maintaining body temperature. When chicks reached 3 days of age, vocally regulated temperaturee did not differ from that attained by thermogenesis, but vocally induced periods of rewarming reduced the duration of temperature challenge. The ability to regulate body temperature through vocalizations precedes the development of endothermy in gulls and other species so far examined, and in some species extends functional thermoregulation back to the late embryonic (pipped egg) stage of development.

scholarly journals Field evaluation of a visual barrier to discourage gull nesting

2001 ◽  
Vol 7 (2) ◽  
pp. 143 ◽  
Author(s):  
P. A. Pochop ◽  
J. L. Cummings ◽  
R. M. Engeman
Keyword(s):  
Columbia River ◽  
Field Evaluation ◽  
Management Technique ◽  
Nesting Habitat ◽  
Control Zone ◽  
Larus Delawarensis ◽  
Polypropylene Fabric ◽  
Benton County ◽  
Bird Management ◽  
Salmon Smolt

Expanding gull populations along the Columbia River have been implicated in depredations to threatened and endangered migrating salmon smolt. We tested a visual barrier made of woven black polypropylene fabric to discourage gull nesting. The barrier was installed on Upper Nelson Island, Benton County, Washington, in parallel rows spaced 5 m apart. Gulls used 87% of the 7.9 ha island as nesting habitat and we estimated >21 000 gull nests, 80% Ring-billed Gull Larus delawarensis and 20% California Gull L. califomicus nests. The zone with fencing had 84% fewer nests than the control zone. Silt fencing showed potential as a nonlethal bird management technique.

Avian Influenza Prevalence and Viral Shedding Routes in Minnesota Ring-Billed Gulls (Larus delawarensis)

2018 ◽  
Vol 63 (sp1) ◽  
pp. 120 ◽  
Author(s):  
Todd Froberg ◽  
Francesca Cuthbert ◽  
Christopher S. Jennelle ◽  
Carol Cardona ◽  
Marie Culhane
Keyword(s):  
Avian Influenza ◽  
Viral Shedding ◽  
Larus Delawarensis

scholarly journals Effects of External Oiling and Rehabilitation on Hematological, Biochemical, and Blood Gas Analytes in Ring-Billed Gulls (Larus delawarensis)

2019 ◽  
Vol 6 ◽  
Author(s):  
Nicholas G. Dannemiller ◽  
Katherine E. Horak ◽  
Jeremy W. Ellis ◽  
Nicole L. Barrett ◽  
Lisa L. Wolfe ◽  
...  
Keyword(s):  
Blood Gas ◽  
Larus Delawarensis

scholarly journals Copulation Behavior, Mate Guarding, and Paternity in the Semipalmated Plover

The Condor ◽  
2000 ◽  
Vol 102 (1) ◽  
pp. 231-235 ◽  
Author(s):  
Yuri Zharikov ◽  
Erica Nol
Keyword(s):  
Large Time ◽  
Mate Guarding ◽  
Breeding Birds ◽  
Visual Contact ◽  
Energy Investment ◽  
Extra Pair Paternity ◽  
Multilocus Dna Fingerprinting ◽  
Clutch Initiation ◽  
Charadrius Semipalmatus ◽  
Copulation Behavior

Abstract We present behavioral observations and multilocus DNA fingerprinting data on Semipalmated Plovers (Charadrius semipalmatus) breeding in the sub-Arctic. We predicted that, where a large time/energy investment by males during incubation and chick-rearing is crucial for successful reproduction, both extra-pair copulation and fertilization rates would be low. Extra-pair copulations were infrequent (7% of total copulations), as were within pair copulations (0.44 hr−1). Copulations occurred, on average 6.2 days prior to clutch initiation. Males spent 64% of their time in visual contact with their mates. Mate guarding during the laying period was significantly more pronounced in coastal neighborhoods of breeding birds than among solitary-nesting pairs. Extra-pair fertilizations occurred in 4% of families resulting in an extra-pair paternity rate of 4.7%.

Age-related variation in song repertoire size and repertoire sharing of yellow warblers (Dendroica petechia)

1986 ◽  
Vol 64 (9) ◽  
pp. 1926-1929 ◽  
Author(s):  
Susan E. Cosens ◽  
Spencer G. Sealy
Keyword(s):  
Reproductive Success ◽  
Dendroica Petechia ◽  
Repertoire Size ◽  
Song Repertoire ◽  
Fledging Success ◽  
Related Variation ◽  
Age Related ◽  
Yellow Warblers ◽  
Clutch Initiation

Songs of male yellow warblers (Dendroica petechia), ranging from 1 to 6 years of age, were recorded in the spring and summer of 1984. Recorded repertoire size and number of songs shared with neighbours varied positively with age in the spring but not in summer. Neither clutch initiation date nor fledging success varied with age or number of songs shared but both measures of reproductive success varied with size of recorded song repertoire.

COLLABORATIVE TACTICS FOR NESTSITE SELECTION BY PAIRS OF BLUE FOOTED BOOBIES

Behaviour ◽  
2002 ◽  
Vol 139 (11-12) ◽  
pp. 1383-1412 ◽  
Author(s):  
Hugh Drummond ◽  
Miriam Calderón-De Anda ◽  
Carmen Perez ◽  
Judy Stamps
Keyword(s):  
Reproductive Biology ◽  
Veto Power ◽  
Male And Female ◽  
Communication Signal ◽  
Joint Decisions ◽  
Clutch Initiation ◽  
A Site ◽  
Behavioural Strategies

AbstractThe dual concern model suggests that pairs of animals can use four different behavioural strategies to resolve disputes that arise when making joint decisions. Based on their reproductive biology, we predicted that mated pairs of blue footed boobies would use one of these strategies, collaboration, when deciding on a location for their nest. Many of the behaviour tactics diagnostic of collaboration were observed in boobies. For instance, nestsite selection was accompanied by extensive exchanges of a specialized communication signal (nestpointing), rates of nestpointing at a given site were strongly related to the likelihood that a pair would select that site for their nest, couples in which the male and female 'disagreed' about the merits of an initial site went on to investigate additional sites together ('expanding the pie'), individuals pointed at maximal rates at a site only after their partner had already pointed at that same site ('feeling out procedures'), and both sexes appeared to have 'veto power' over potential nestsites, in the sense that a site was virtually never accepted for the nest if one of the two partners failed to point at that site prior to clutch initiation. These results support the hypothesis that mated pairs of blue footed boobies may use collaborative tactics when selecting a nestsite; descriptive accounts suggest that similar tactics may occur in other birds in which mated pairs jointly decide on the location for their nest.

scholarly journals Sexual Selection and Tail-Length Dimorphism in Scissor-Tailed Flycatchers

The Auk ◽  
2001 ◽  
Vol 118 (1) ◽  
pp. 167-175 ◽  
Author(s):  
Jonathan V. Regosin ◽  
Stephen Pruett-Jones
Keyword(s):  
Sexual Dimorphism ◽  
Tail Length ◽  
Female Tail ◽  
Monogamous Species ◽  
Female Quality ◽  
Early Arrival ◽  
Socially Monogamous ◽  
Breeding Grounds ◽  
Clutch Initiation ◽  
Beak Length

Abstract Scissor-tailed Flycatchers (Tyrannus forficatus) exhibit elongated tails in both sexes, and sexual dimorphism in tail length. At Fort Sill, Oklahoma, during 1991 and 1992, Scissor-tailed Flycatchers exhibited sexual dimorphism (male–female) in tail length (1.48), with more moderate sexual dimorphism in wing length (1.09) and beak length (1.04). Based on an analysis of museum specimens, immature birds (<1 year of age) of both sexes in their first calendar year exhibited significantly shorter tails than adults (measured in the field). Furthermore, tail length was highly variable among both sexes relative to other morphological traits. Male tail length was correlated with early clutch initiation by the male's mate and, in 1991, with larger clutch size. Similarly, female tail length was correlated with early clutch initiation, and, in one year, larger clutches. Longer-tailed females also tended to arrive earlier on the breeding grounds in 1992, the only year for which such data were available. Assortative mating by tail length was observed. Those findings support the hypothesis that tail length is a sexually selected trait in this socially monogamous species, and that female tail length may be correlated with measures of female quality (e.g. early arrival and breeding, large clutches). However, confounding effects of age on tail length make it difficult to distinguish among various hypotheses for evolution of elongated tails in this species.

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