No evidence of extra-pair paternity or intraspecific brood parasitism in the Imperial Shag Phalacrocorax atriceps

Calderón, Luciano; Svagelj, Walter S.; Quintana, Flavio; Lougheed, Stephen C.; Tubaro, Pablo L.

doi:10.1007/s10336-011-0754-6

Cited by 10 publications

(6 citation statements)

References 43 publications

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“…In the analysis, the error rate of genotyping was set to 0.025 as suggested by Wang ( 2004 ). We did not allow for multiple maternity within broods, as despite a large body of molecular paternity studies in Phalacrocorax genus and other genera from Suliformes order (Graves et al 1993 ; Baumgarten et al 2001 ; Dearborn et al 2001 ; Anderson and Boag 2006 ; Baião and Parker 2009 ; Calderón et al 2012 ), no sound empirical evidence was found for either conspecific brood parasitism or quasi parasitism in this group of birds (reviewed in Yom-Tov 2001 ; Griffith et al 2004 ). Secondly, we tested for full-sibling relationships using likelihood ratio tests based on Queller and Goodnight’s r (Queller and Goodnight 1989 ; Goodnight and Queller 1999 ) implemented in KINGROUP v2 (Konovalov et al 2004 ).…”

Section: Methodsmentioning

confidence: 99%

Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location

Minias

Wojczulanis‐Jakubas

Rutkowski

et al. 2016

Behav Ecol Sociobiol

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Centres of avian colonies are usually associated with reduced predation risk and, thus, attract individuals of high quality, while poor-quality individuals are relegated to peripheral zones. Assuming that the incidence of extra-pair paternity (EPP) is dependent on individual quality, we could expect lower incidence of extra-pair offspring in the central parts of colonies. On the other hand, central pairs often nest in higher densities, which might increase EPP rate. To test these hypotheses, we sampled 124 great cormorant Phalacarocorax carbo sinensis chicks from 30 broods from different zones of a colony and genotyped them at seven highly polymorphic microsatellite loci. Sibship reconstruction confirmed the presence of at least one extra-pair chick in 30.0 % of broods. We found that EPP varied significantly between the zones of the colony, with higher incidence of extra-pair broods in the peripheral zone (53.3 vs. 6.7 % of broods). Centre-edge difference in EPP was consistent with the expected distribution of pair quality and suggested that poor-quality peripheral females were more likely to solicit extra-pair interactions, possibly to gain ‘good genes’ for their offspring. By contrast, we found no evidence for density dependence in EPP rate, indicating that likelihood of raising extra-pair offspring was not constrained by limited availability of local males. The results indicate that spatial randomization of sampling within avian colonies is critical to obtain robust estimations of EPP for non-solitary species. To our knowledge, this study provides the first evidence for the centre-edge difference in EPP within a breeding colony of birds.

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Section: Methodsmentioning

confidence: 99%

Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location

Minias

Wojczulanis‐Jakubas

Rutkowski

et al. 2016

Behav Ecol Sociobiol

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“…The Imperial Shag is a colonial ground-nesting seabird where both parents play an active role in the care and feeding of chicks throughout the breeding cycle ( Johnsgard, 1993 ). This monogamous seabird usually lays a three-egg clutch that hatches asynchronously over 4–5 days ( Svagelj and Quintana, 2011a , Svagelj and Quintana, 2011b , Calderón et al., 2012 ). This hatching pattern results in age and size asymmetry between chicks, where the probability of fledging drastically decreases with hatching order ( Svagelj and Quintana, 2011a ).…”

Section: Introductionmentioning

confidence: 99%

Lousy chicks: Chewing lice from the Imperial Shag, Leucocarbo atriceps

Leonardi

Quintana

2017

International Journal for Parasitology: Parasites and Wildlife

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Forty-one imperial shag chicks were sampled for lice during the breeding season of 2014 in Punta León, Argentina. We found 2 lice species, Pectinopygus turbinatus infesting the body and Piagetiella caputincisum present in the oral cavity of the birds. This constitutes the first host record for P. turbinatus and the first record for the continental Argentina for P. caputincisum. Ninety-three percent of the chicks were infested by at least one lice species. P. turbinatus was present in all of the lousy chicks, while P. caputincisum infested 84.2% of them. The mean intensity was 29.5 and the range 1–129. There was no difference in prevalence, mean intensity or mean abundance between louse species. However, we found differences among the pattern of infestation of each species. Imperial shag chicks were infested by their parents during their first days of life by P. turbinatus, mainly in nymphal stage and by P. caputincisum as adult lice. Our results showed differences among lice species that could be related to the restrictions that lice from seabirds faced during their life cycle.

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“…One such strategy is nest parasitism, in which the costs of parental investment are transferred to other individuals. However, anti-parasitic strategies of hosts may end up counterbalancing the extra benefits that a parasite can derive in not caring for their own offspring (Lezalová-Piálková 2011, Calderón et al 2012). In species characterized by alloparental care, there is a division in the costs of caring for offspring among individuals that breed in close proximity to one another or that have a level of kinship that justifies their investment through increased inclusive fitness.…”

Section: Introductionmentioning

confidence: 99%

WHEN THE FLEDGLINGS RED-FOOTED BOOBIES (Sula sula) ACQUIRE FLIGHT CAPACITY

Rodrigues¹,

Araújo²,

Arruda³

2016

Oecol. Aust.

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The high cost of parental care may sometimes result in a conflict of interest between parents and offspring. To achieve the benefits of producing viable offspring and/or additional breeding opportunities, tropical seabirds must be able to afford the costs of searching for food in an oligotrophic environment. In order to verify the behavioral variation of Red-footed Boobies (Sula sula) during the late phase of its development, over a 12 week period was recorded the behavior of 15 fledglings. The behavioral records were made with the instantaneous focal animal method in windows of 15 minutes and records every minute. Records of feeding, agonism and frigates attacks were recorded ad libitum during the days of observation. No differences in the frequency of activities displayed by offspring at advanced stages of fledgling development, or in the frequency of parental presence during the transitional period to full capacity for flight were detected. On the other hand, it was observed that fledglings synchronized their presence at the nest with that of the adults even after achieving full flight capacity and that during periods of absence neighboring offspring were likely to occupy vacant nests. We speculate that with this behavior they apparently are trying to acquire, opportunistically, extra food resources from other, not directly related adults. However, we did not observe any fledgling being fed by a non-related adult. We also recorded the expression of aggressive behaviors of a fledgling towards a neighboring fledgling on the nest. These observations suggest the presence of a behavioral strategy in this species that is motivated by the continuously high demand for sustenance as the frequency of parental provisioning declines during the more advanced stages of offspring development. Although we did not verify changes in the fledglings' behavioral repertoire, the occurrence of agonistic behavior among them suggests that they must try alternative strategies to get food while not quite ready to live independently.

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No evidence of extra-pair paternity or intraspecific brood parasitism in the Imperial Shag Phalacrocorax atriceps

Cited by 10 publications

References 43 publications

Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location

Spatial patterns of extra-pair paternity in a waterbird colony: separating the effects of nesting density and nest site location

Lousy chicks: Chewing lice from the Imperial Shag, Leucocarbo atriceps

WHEN THE FLEDGLINGS RED-FOOTED BOOBIES (Sula sula) ACQUIRE FLIGHT CAPACITY

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