Ticks as a Factor in Nest Desertion of California Brown Pelicans

King, Kirke A.; Keith, James O.; Mitchell, Christine A.; Keirans, James E.

doi:10.2307/1367739

Cited by 43 publications

(25 citation statements)

References 10 publications

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“…Alternatively, recruitment can be influenced indirectly by disease effects that change maternal behaviors such as foraging, avoiding predators, and caring for young. For example, parasitism can compromise nutritional status and alter maternal care, and, in so doing, reduce offspring survival (King et al, 1977;Birkhead and Perrins, 1985;Festa-Bianchet, 1988;Davidar and Morton, 1993;Harshman and Zera, 2007).…”

Section: Introductionmentioning

confidence: 99%

Estimating Chronic Wasting Disease Effects on Mule Deer Recruitment and Population Growth

Dulberger

Hobbs

Swanson³

et al. 2010

Journal of Wildlife Diseases

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ABSTRACT:Chronic wasting disease (CWD), a prion disease of mule deer (Odocoileus hemionus), accelerates mortality and in so doing has the potential to influence population dynamics. Although effects on mule deer survival are clear, how CWD affects recruitment is less certain. We studied how prion infection influenced the number of offspring raised to weaning per adult ($2 yr old) female mule deer and subsequently the estimated growth rate (l) of an infected deer herd. Infected and presumably uninfected radio-collared female deer were observed with their fawns in late summer (August-September) during three consecutive years (2006)(2007)(2008) in the Table Mesa area of Boulder, Colorado, USA. We counted the number of fawns accompanying each female, then used a fully Bayesian model to estimate recruitment by infected and uninfected females and the effect of the disease on l. On average, infected females weaned 0.95 fawns (95% credible interval50.56-1.43) whereas uninfected females weaned 1.34 fawns (95% credible interval51.09-1.61); the probability that uninfected females weaned more fawns than infected females was 0.93). We used estimates of prevalence to weight recruitment and survival parameters in the transition matrix of a three-age, single-sex matrix model and then used the matrix to calculate effects of CWD on l. When effects of CWD on both survival and recruitment were included, the modeled l was 0.97 (95% credible interval 5 0.82-1.09). Effects of disease on l were mediated almost entirely by elevated mortality of infected animals. We conclude that although CWD may affect mule deer recruitment, these effects seem to be sufficiently small that they can be omitted in estimating the influences of CWD on population growth rate.

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Section: Introductionmentioning

confidence: 99%

Estimating Chronic Wasting Disease Effects on Mule Deer Recruitment and Population Growth

Dulberger

Hobbs

Swanson³

et al. 2010

Journal of Wildlife Diseases

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“…There, at least 15 hollow totara trees had harboured for long periods the presumed single colony of Mystacina (estimated at 200-300 individuals). Why this colony had used so many roosts is not known, but build up of mites and/or ticks could lead to desertion of roosts, just as birds have deserted colonies overrun by ticks (Feare, 1976;King et al, 1977).…”

Section: Discussionmentioning

confidence: 99%

Mite infestation (Acari: Laelapidae) of New Zealand short-tailed bats,Mystacina tuberculata, in captivity

Heath

Julian

Daniel

et al. 1987

Journal of the Royal Society of New Zealand

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An infestation of the endangered New Zealand short-tailed bat, Mystacina tuberculata Gray 1843, by a new species of mesostigmatid mite is described, together with the mite's life history. All six bats of a zoo colony died of septicaemia in circumstances which strongly suggest that the presence of the mites or their feeding caused a severe irritation, wh ich incited the bats to lacerate their own ears. These self-inflicted injuries may have allowed microorganisms, growing on extravasated fluids, to enter the lesions and kill the bats. This type of self-inflicted injury has apparently not been reported before for wild or captive Chiroptera.

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“…Death of the nestlings may result from transmission of a lethal Soldado-like arbovirus from the tick (Converse et al 1975). Infestations also are known to reduce brood size in Texas (King et al 1977a(King et al , 1977b. We think the actual importance of this tick to the AWP probably depends on air temperature.…”

Section: Bird Healthmentioning

confidence: 96%

“…As indicated above, they are not specific to the AWP, but they infect several different aquatic birds. King et al (1977a) found that three deserted brown pelican nests in Aransas National Wildlife Refuge, Texas, yielded 2,389 adult and nymphal specimens of the tick. This and perhaps another species (Ornithodoros denmarki) probably caused nest desertion by the brown pelican in Gulf of California nests.…”

Section: Bird Healthmentioning

confidence: 99%

“…This and perhaps another species (Ornithodoros denmarki) probably caused nest desertion by the brown pelican in Gulf of California nests. Scratching and preening behavior occurred from 32-68% of the morning and afternoon observation times in areas where desertion was greatest (King et al 1977b). Death of the nestlings may result from transmission of a lethal Soldado-like arbovirus from the tick (Converse et al 1975).…”

Section: Bird Healthmentioning

confidence: 99%

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Parasites of the American White Pelican

Overstreet

Curran

2005

GCR

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Metazoan symbionts, including parasites, infecting the American white pelican (AWP) Pelecanus erythrorhynchos comprise a list of 75 species, 7 of which are new host records. Several new geographic records are also presented, but generally these have a low value because of the migratory nature of the bird. Evidence suggests that some parasites, mostly flies and other arthropods but also nematodes and digeneans, produce detrimental behavioral or pathologic changes in the AWP. Some of the arthropods transmit microbial agents to the pelican. Two digeneans that have the AWP as a definitive host harm and even kill their catfish intermediate host, especially in aquaculture, and another causes abnormalities and mortality in amphibians. Some of the arthropods with low hostspecificity can potentially transmit harmful microbial agents to humans and domestic animals. A few avian bloodflukes, intestinal flukes, and nematodes can potentially cause "swimmers itch," gastroenteritis, and "anisakiasis," respectively, in humans. Because of the life cycles of some helminths, presence of those worms can provide an indication as to the dietary items of a specific pelican individual, where the individual has been, and how long it has been present in an area. Feather mites, lice, and diplostomoid digeneans serve as good parasites to indicate phylogenetic relationships among different pelican species as well as relationships among the Pelecanidae and other families such as the Sulidae.

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Ticks as a Factor in Nest Desertion of California Brown Pelicans

Cited by 43 publications

References 10 publications

Estimating Chronic Wasting Disease Effects on Mule Deer Recruitment and Population Growth

Estimating Chronic Wasting Disease Effects on Mule Deer Recruitment and Population Growth

Mite infestation (Acari: Laelapidae) of New Zealand short-tailed bats,Mystacina tuberculata, in captivity

Parasites of the American White Pelican

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