Distribution and abundance of immature Tabanidae (Diptera) in a subarctic Labrador peatland

McElligott, Paul E.K.; Lewis, D. J.

doi:10.1139/z96-149

Cited by 7 publications

(4 citation statements)

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“…Francisella tularensis seroprevalence was lower for WH polar bears that had been previously captured near the town of Churchill. It is possible that polar bears in closer proximity to the coast find refuge from deer flies and horseflies (Tabanidae), which use peatland habitats for key aspects of their life cycle (McElligott & Lewis, 1996 ). However, although polar bears demographically segregate, with males staying along the coast (Derocher & Stirling, 1990b ) and adult females using inland areas (Derocher & Stirling, 1990a ), we did not find any significant difference in F. tularensis seroprevalence of males (49%) and females (55%).…”

Section: Discussionmentioning

confidence: 99%

Long‐term increases in pathogen seroprevalence in polar bears (Ursus maritimus) influenced by climate change

Pilfold

Richardson

Ellis

et al. 2021

Global Change Biology

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The influence of climate change on wildlife disease dynamics is a burgeoning conservation and human health issue, but few long‐term studies empirically link climate to pathogen prevalence. Polar bears (Ursus maritimus) are vulnerable to the negative impacts of sea ice loss as a result of accelerated Arctic warming. While studies have associated changes in polar bear body condition, reproductive output, survival, and abundance to reductions in sea ice, no long‐term studies have documented the impact of climate change on pathogen exposure. We examined 425 serum samples from 381 adult polar bears, collected in western Hudson Bay (WH), Canada, for antibodies to selected pathogens across three time periods: 1986–1989 (n = 157), 1995–1998 (n = 159) and 2015–2017 (n = 109). We ran serological assays for antibodies to seven pathogens: Toxoplasma gondii, Neospora caninum, Trichinella spp., Francisella tularensis, Bordetella bronchiseptica, canine morbillivirus (CDV) and canine parvovirus (CPV). Seroprevalence of zoonotic parasites (T. gondii, Trichinella spp.) and bacterial pathogens (F. tularensis, B. bronchiseptica) increased significantly between 1986–1989 and 1995–1998, ranging from +6.2% to +20.8%, with T. gondii continuing to increase into 2015–2017 (+25.8% overall). Seroprevalence of viral pathogens (CDV, CPV) and N. caninum did not change with time. Toxoplasma gondii seroprevalence was higher following wetter summers, while seroprevalences of Trichinella spp. and B. bronchiseptica were positively correlated with hotter summers. Seroprevalence of antibodies to F. tularensis increased following years polar bears spent more days on land, and polar bears previously captured in human settlements were more likely to be seropositive for Trichinella spp. As the Arctic has warmed due to climate change, zoonotic pathogen exposure in WH polar bears has increased, driven by numerous altered ecosystem pathways.

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Section: Discussionmentioning

confidence: 99%

Long‐term increases in pathogen seroprevalence in polar bears (Ursus maritimus) influenced by climate change

Pilfold

Richardson

Ellis

et al. 2021

Global Change Biology

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“…Areas with abundant water are likely to have high population of tabanids, as most tabanids require water for breeding and development (Mitzmain, 1913;Service, 1986;McElligott and Lewis, 1996;Butt et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Microsatellite typing and population structuring of Trypanosoma evansi in Mindanao, Philippines

McInnes¹,

Dargantes²,

Ryan³

et al. 2012

Veterinary Parasitology

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Please cite this article as: McInnes, L.M., Dargantes, A.P., Ryan, U.M., Reid, S.A., Microsatellite typing and population structuring of Trypanosoma evansi in Mindanao, Philippines, Veterinary Parasitology (2010), doi:10.1016/j.vetpar.2011 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. (ADN)) in Mindanao, Philippines were each successfully genotyped using a suite of 7 25 polymorphic microsatellites. The study identified 16 multi locus genotypes (MLG) within the T. 26 evansi isolates and evidence of the spread of surra outbreaks from one village to another, most 27 likely due to the movement of infected animals. Genotyping provided evidence of population 28 sub-structuring with 3 populations (I, II and III (only 1 isolate)) identified. The most abundant 29 population was II, which was the predominant population in ADS and SDS (p=0.022). In 30 addition, buffalo mortality was statistically higher in outbreak areas associated with isolates from 31 population I (13.6%) than with isolates from population II (6.9%) (p=0.047). The present study 32 has highlighted the utility of microsatellite loci to improve understanding of the epidemiology of 33 T. evansi and in tracking surra outbreaks. 34 35 KEYWORDS 36Trypanosoma evansi, surra, epidemic, microsatellites, DNA, Mindanao, Philippines. 37 38Page 3 of 43 A c c e p t e d M a n u s c r i p t 3 Introduction 39Trypanosoma evansi is endemic in Africa, the Middle East, Central and South America, and 40 many parts of Asia including the Philippines (OIE, 2008 with an outbreak in the North Samar province reported to have caused buffalo mortalities in 47 excess of a thousand over a 6-month period (Cresencio et al., 1994; Manuel, 1998). 48Surra was first introduced into the Philippines in the early 19 th century with the 49 importation of infected cavalry horses from China by the American forces during the American-50Spanish war (Manuel, 1998). The initial and successive surra cases which occurred in the 51Philippines were predominately reported as high mortalities of equines (Manresa, 1935; Randall 52 and Schwartz, 1936; Manuel, 1998). Mindanao, the second largest and southernmost island in 53 the Philippine archipelago appeared to be free of surra until 1989 when the first reported cases of 54 surra (38% equine and bovine mortality) were recorded in the southern Mindanao province of 55 Sarangani (Mercado, R. pers. comm., 2010). Subsequent to the Sarangani outbreak, further surra 56 outbreaks have occurred in a range of Mindanao provinces (Fig. 1). At present, the economic 57 losses due to surra in Mindanao have been estimated at US$1.58 million per year from every 1...

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“…En esta condición se encuentran Agromyzidae, Chloropidae y Sarcophagidae. Aunque con presencia numérica baja, se registró la presencia de Tabanidae y Simuliidae; las larvas de las moscas tabánidos son habitantes comunes de turberas boreales y subárticas (McElligott & Lewis, 1996). En el área, Tabanidae está principalmente representada por el género Dasybasis; las larvas de especies de este género usan las vegas como hábitat donde desarrollarse (González, 2002(González, , 2004(González, , 2014.…”

Section: Discussionunclassified

Efecto de la condición hídrica de vegas altoandinas del desierto transicional de Chile sobre algunas características comunitarias de su dipterofauna

Cepeda-Pizarro

Pizarro-Araya

González

2016

Idesia

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RESUMENEn relación con los invertebrados, el conocimiento acerca de la biota de las vegas altoandinas del norte-centro de Chile es claramente asimétrico. En este trabajo, mediante el empleo de trampas de intercepción de caída y aérea, se estudió la dipterofauna de tres vegas diferentes en su condición hídrica. Del total capturado, la vega húmeda aportó el 52,1%; la vega seca, el 38,3% y la vega mésica, el 9,6%. Se registró la presencia de 29 familias, estimándose un máximo de 30. Por tipo de vega se registraron pequeñas diferencias en el número de familias comunes y exclusivas. Entre vegas, mientras Muscidae dominó numéricamente en la vega seca; Muscidae y Chironomidae codominaron en la vega mésica; a su vez, Chironomidae y Sphaeroceridae lo hicieron en la vega húmeda. Se detectó un efecto de la condición hídrica de la vega sobre las relaciones entre familias de su abundancia relativa. Este efecto se observó igualmente en las comparaciones de diversidad y equitabilidad. El agua está siendo un recurso cada vez más escaso en la región desértica de Chile. Por ello, vegas como las estudiadas en esta ocasión están en un estado muy vulnerable. Este trabajo aporta antecedentes que muestran que no solo los elementos bióticos mayores de estas unidades de paisaje están en situación de riesgo, sino que también los elementos menos conspicuos de ellas, pero no menos importantes por ser la base de muchas de las cadenas alimentarias y los procesos de descomposición de la materia que tienen lugar en el ambiente andino.Palabras clave: Andes semiáridos, biodiversidad, diptera, ecosistemas de montaña, pastizales húmedos, insectos andinos. ABSTRACT Regarding the invertebrates, knowledge about the biota of the Andean peatlands of north-central IntroducciónDonde las condiciones orográficas y de humedad de los Andes desértico-transicionales de Chile lo permiten, se forman las vegas altoandinas (Squeo et al., 1994(Squeo et al., , 2006a. Considerando que estas unidades del paisaje andino-desértico son importantes proveedores de servicios (i.e. focos de biodiversidad, almacenamiento de agua y provisión de recursos forrajeros, ecoturismo), que están sujetos a una presión antrópica incremental por los recursos que contienen, y a la acción de A. ARTÍCULOS DE INVESTIGACIÓN / RESEARCH PAPERS

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Distribution and abundance of immature Tabanidae (Diptera) in a subarctic Labrador peatland

Cited by 7 publications

References 6 publications

Long‐term increases in pathogen seroprevalence in polar bears (Ursus maritimus) influenced by climate change

Long‐term increases in pathogen seroprevalence in polar bears (Ursus maritimus) influenced by climate change

Microsatellite typing and population structuring of Trypanosoma evansi in Mindanao, Philippines

Efecto de la condición hídrica de vegas altoandinas del desierto transicional de Chile sobre algunas características comunitarias de su dipterofauna

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