Reproductive effort and T-lymphocyte cell-mediated immunocompetence in female pied flycatchers Ficedula hypoleuca

Moreno, Juan; Sanz, Juan José; Arriero, Elena

doi:10.1098/rspb.1999.0750

Cited by 125 publications

(115 citation statements)

References 37 publications

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“…However, unlike eiders, passerines may be able to compensate for increased incubation demands by increasing their food intake. In contrast, experimental alteration of brood size during chick feeding in passerine birds, which presumably increase nestling provisioning rate, have been found to result in a negative relationship between brood size and measures of humoral immunocompetence (Deerenberg et al 1997;Nordling et al 1998;Moreno et al 1999;Saino et al 2002;but see Bruun 2002;Ilmonen et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Cost of reproduction in a long-lived bird: incubation effort reduces immune function and future reproduction

et al. 2005

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Life-history theory predicts that increased current reproductive effort should lead to a fitness cost. This cost of reproduction may be observed as reduced survival or future reproduction, and may be caused by temporal suppression of immune function in stressed or hard-working individuals. In birds, consideration of the costs of incubating eggs has largely been neglected in favour of the costs of brood rearing. We manipulated incubation demand in two breeding seasons (2000 and 2001) in female common eiders (Somateria mollissima) by creating clutches of three and six eggs (natural range 3-6 eggs). The common eider is a long-lived sea-duck where females do not eat during the incubation period. Mass loss increased and immune function (lymphocyte levels and specific antibody response to the non-pathogenic antigens diphtheria and tetanus toxoid) was reduced in females incubating large clutches. The increased incubation effort among females assigned to large incubation demand did not lead to adverse effects on current reproduction or return rate in the next breeding season. However, large incubation demand resulted in long-term fitness costs through reduced fecundity the year after manipulation. Our data show that in eiders, a long-lived species, the cost of high incubation demand is paid in the currency of reduced future fecundity, possibly mediated by reduced immune function.

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Section: Discussionmentioning

confidence: 99%

Cost of reproduction in a long-lived bird: incubation effort reduces immune function and future reproduction

et al. 2005

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“…These results add to the growing body of evidence supporting an energetic trade-off between immune function and other life-history traits. For example, studies in birds have shown that immune function is negatively related to reproductive effort (Ardia, 2005;Deerenberg et al, 1997;Lochmiller and Deerenberg, 2000;Moreno et al, 1999;Norris and Evans, 2000), growth rate (Mauck et al, 2005) and rapid feather growth during moult (Martin, 2005). Likewise, experimentally inducing immune responses leads to a decrease in body condition (Sanz et al, 2004) and nestling growth (AlonsoAlvarez and Tella, 2001).…”

Section: Discussionmentioning

confidence: 99%

Constitutive immune function in European starlings,Sturnus vulgaris, is decreased immediately after an endurance flight in a wind tunnel

Nebel

Bauchinger

Buehler

et al. 2012

Journal of Experimental Biology

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SUMMARYLife-history theory predicts that animals face a trade-off in energy allocation between performing strenuous exercise, such as migratory flight, and mounting an immune response. We experimentally tested this prediction by studying immune function in European starlings, Sturnus vulgaris, flown in a wind tunnel. Specifically, we predicted that constitutive immune function decreases in response to training and, additionally, in response to immediate exercise. We compared constitutive immune function among three groups: (1) ʻuntrainedʼ birds that were kept in cages and were not flown; (2) ʻtrainedʼ birds that received flight training over a 15day period and performed a 1-4h continuous flight, after which they rested for 48h before being sampled; and (3) ʻpost-flightʼ birds that differed from the ʻtrainedʼ group only in being sampled immediately after the final flight. A bird in our trained group represents an individual during migration that has been resting between migratory flights for at least 2days. A bird in our post-flight group represents an individual that has just completed a migratory flight and has not yet had time to recover. Three of our four indicators (haptoglobin, agglutination and lysis) showed the predicted decrease in immune function in the post-flight group, and two indicators (haptoglobin, agglutination) showed the predicted decreasing trend from the untrained to trained to post-flight group. Haptoglobin levels were negatively correlated with flight duration. No effect of training or flight was detected on leukocyte profiles. Our results suggest that in European starlings, constitutive immune function is decreased more as a result of immediate exercise than of exercise training. Because of the recent emergence of avian-borne diseases, understanding the trade-offs and challenges faced by long-distance migrants has gained a new level of relevance and urgency.

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“…Many studies have shown that parasites are important in parental care strategies (Christe et al 1994;Merilä and Allander 1995;Moreno et al 1999;Tripet et al 2002). Young animals have naive immune systems, as they have not been exposed to a wide variety of pathogens (Hutchings et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Early Ontogenetic Diet in Gray Wolves, <em>Canis lupus</em>, of Coastal British Columbia

et al. 2006

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Within populations, different age classes often consume dissimilar resources, and provisioning of juveniles by adults is one mechanism by which this can occur. Although the diet of Gray Wolves (Canis lupus) has been studied extensively, the diet of pups is largely unknown. We examined faeces deposited by altricial pups and adult providers during the first two months following birth at two den sites over two years on the central coast of British Columbia, Canada. Pups and adult wolves consumed similar species, and Black-tailed Deer (Odocoileus hemionus) constituted most of the diet for both age groups. Pup and adult diet, however, diverged. Specifically, adult deer occurred significantly less frequently in the diet of pups than in the diet of adult wolves, which suggests that adults selectively provisioned pups. We speculate that this may relate to adaptive strategies of adult wolves to provide their offspring with food of optimal nutritional value or reduced parasitic burden, and/or logistic factors associated with provisioning such as prey transportability and availability.

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Reproductive effort and T-lymphocyte cell-mediated immunocompetence in female pied flycatchers Ficedula hypoleuca

Cited by 125 publications

References 37 publications

Cost of reproduction in a long-lived bird: incubation effort reduces immune function and future reproduction

Cost of reproduction in a long-lived bird: incubation effort reduces immune function and future reproduction

Constitutive immune function in European starlings,Sturnus vulgaris, is decreased immediately after an endurance flight in a wind tunnel

Early Ontogenetic Diet in Gray Wolves, <em>Canis lupus</em>, of Coastal British Columbia

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