Capture Stress and the Bactericidal Competence of Blood and Plasma in Five Species of Tropical Birds

Matson, Kevin D.; Tieleman, B. Irene; Klasing, Kirk C.

doi:10.1086/501057

Cited by 202 publications

(233 citation statements)

References 41 publications

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“…Larger birds may also be more prone to internal injuries, breaks, cuts and leg injuries because their size increases their impact with the net. The stress response in birds is known to vary by species (Matson, Tieleman, & Klasing 2006;Cockrem 2007), but we found no evidence in the literature of a consistent trend with body mass that could explain why lighter birds were more prone to stress in our study. Smaller birds with faster metabolisms are known to thermoregulate differently than larger birds and thus respond differently to heat stress (Weathers 1981).…”

Section: Discussioncontrasting

confidence: 84%

How safe is mist netting? evaluating the risk of injury and mortality to birds

et al. 2011

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Summary1. The capture of birds using mist nets is a widely utilized technique for monitoring avian populations. While the method is assumed to be safe, very few studies have addressed how frequently injuries and mortalities occur and the associated risks have not been formally evaluated. 2. We quantified the rates of mortality and injury at 22 banding organizations in the United States and Canada and used capture data from five organizations to determine what kinds of incidents occur most frequently. Analyses focused on passerines and near-passerines, but other groups were included. We evaluated whether body mass, age, sex, mist net mesh size, month and time of day or frequency of capture are related to the risk or type of incident. We also compared the recapture histories over time between birds that were injured and those that were never injured for 16 species. 3. The average rate of injury was 0AE59%, while mortality was 0AE23%. Birds captured frequently were less at risk to incident. Body mass was positively correlated with incident and larger birds were at greater risk to predation, leg injuries, broken legs, internal bleeding and cuts, while smaller birds were more prone to stress, tangling-related injuries and wing strain. Rates of incident varied among species, with some at greater risk than others. We found no evidence for increased mortality over time of injured birds compared with uninjured birds. 4. We provide the first comprehensive evaluation of the risks associated with mist netting. Our results indicate that (1) injury and mortality rates below one percent can be achieved during mist netting and (2) injured birds are likely to survive in comparable numbers to uninjured birds after release. While overall risks are low, this study identified vulnerable species and traits that may increase a bird's susceptibility to incident that should be considered in banding protocols aimed at minimizing injury and mortality. Projects using mist nets should monitor their performance and compare their results to those of other organizations.

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Section: Discussioncontrasting

confidence: 84%

How safe is mist netting? evaluating the risk of injury and mortality to birds

et al. 2011

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“…We found that hemolysis and agglutination (measures of natural antibody levels and complement activation, respectively; Matson et al 2005) covaried positively, as found before in other avian species (Matson et al 2006). This correlation is expected because natural antibodies, responsible for hemagglutination, are also involved in the hemolysis process, as antibodies interact with the antigen (SRBC) to create complexes on which complement proteins responsible for lysis act (Matson et al 2005).…”

Section: Discussionsupporting

confidence: 85%

Sex-Specific Effects of High Yolk Androgen Levels on Constitutive and Cell-Mediated Immune Responses in Nestlings of an Altricial Passerine

Muriel

Pérez‐Rodríguez

Ortiz‐Santaliestra

et al. 2017

Physiological and Biochemical Zoology

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Avian embryos are exposed to yolk androgens that are incorporated into the egg by the ovulating female. These steroids can affect several aspects of embryo development, often resulting in increases in overall size or the speed of growth of different traits. However, several studies suggest that they also entail immune costs to the offspring. In this study, we explored whether variation in yolk androgen concentration affected several measures of the constitutive and cell-mediated immune axes in the spotless starling (Sturnus unicolor). Using a within-brood design, we injected different doses of androgens (testosterone and androstenedione) into the eggs. Our study showed that experimentally increased yolk androgens led to sex-specific immunosuppression in both the innate and adaptive axes of the immune system. Both cell-mediated immune response (CMI) and lysozyme activity decreased with increasing androgen levels injected into the egg in the case of male nestlings, whereas there were no effects on females. The effects that we found were always linear: no quadratic or threshold patterns were detected. We found no effects of the experimental treatment in hemolysis or agglutination capacity, but these measures were negatively correlated with CMI, suggesting negative correlation among different branches of the immune system. Blood (trypanosomes and hemosporidians) and intestinal (coccidia) parasites were not affected by the experimental increase of yolk androgen levels. Our results show that in our study species yolk androgens induce immunosuppression in some axes of the male nestling immune system. Further studies should analyze the proximate causes for these contrasting effects in different axes of the immune system and the reason for the differential impact on males and females.

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“…Using different mitogens (e.g., PHA, ConA, LPS), different lymphocyte subsets are targeted, providing information on more than one cell type (Fairbrother et al 2004). Although performance of this assay requires a specialized laboratory setting, it can be accomplished through fruitful collaborations among ecoimmunologists and more traditional immunologists, as is generally the case for other measures of immune function (e.g., Matson et al 2005Matson et al , 2006Millet et al 2007). The lymphocyte proliferation assayas do most assays of immune function-has some limitations in addition to its strengths (Fairbrother et al 2004;Demas et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…We assessed bactericidal competence of plasma following the method of Matson et al (2006), with a few modifications for use in garter snakes (Sparkman and Palacios 2009;Palacios et al 2011). A pellet of lyophilized E. coli (ATCC8739; Microbiologics, St.…”

Section: Bactericidal Competence Of Plasmamentioning

confidence: 99%

Complex Interplay of Body Condition, Life History, and Prevailing Environment Shapes Immune Defenses of Garter Snakes in the Wild

Palacios¹,

Cunnick²,

Bronikowski³

2013

Physiological and Biochemical Zoology

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The immunocompetence "pace-of-life" hypothesis proposes that fast-living organisms should invest more in innate immune defenses and less in adaptive defenses compared to slow-living ones. We found some support for this hypothesis in two lifehistory ecotypes of the snake Thamnophis elegans; fast-living individuals show higher levels of innate immunity compared to slow-living ones. Here, we optimized a lymphocyte proliferation assay to assess the complementary prediction that slowliving snakes should in turn show stronger adaptive defenses. We also assessed the "environmental" hypothesis that predicts that slow-living snakes should show lower levels of immune defenses (both innate and adaptive) given the harsher environment they live in. Proliferation of B-and T-lymphocytes of free-living individuals was on average higher in fast-living than slow-living snakes, opposing the pace-of-life hypothesis and supporting the environmental hypothesis. Bactericidal capacity of plasma, an index of innate immunity, did not differ between fast-living and slow-living snakes in this study, contrasting the previously documented pattern and highlighting the importance of annual environmental conditions as determinants of immune profiles of free-living animals. Our results do not negate a link between life history and immunity, as indicated by ecotype-specific relationships between lymphocyte proliferation and body condition, but suggest more subtle nuances than those currently proposed.

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Capture Stress and the Bactericidal Competence of Blood and Plasma in Five Species of Tropical Birds

Cited by 202 publications

References 41 publications

How safe is mist netting? evaluating the risk of injury and mortality to birds

How safe is mist netting? evaluating the risk of injury and mortality to birds

Sex-Specific Effects of High Yolk Androgen Levels on Constitutive and Cell-Mediated Immune Responses in Nestlings of an Altricial Passerine

Complex Interplay of Body Condition, Life History, and Prevailing Environment Shapes Immune Defenses of Garter Snakes in the Wild

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