Rainfall induces time-lagged changes in the proportion of tropical aquatic hosts infected with metazoan parasites

Pech, Daniel; Aguirre-Macedo, M. Leopoldina; Lewis, J. W.; Vidal‐Martínez, Víctor M.

doi:10.1016/j.ijpara.2010.01.009

Cited by 26 publications

(27 citation statements)

References 33 publications

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“…quaternia in C. hippurus, along with the monthly patterns of ONI 1+2 (Statistica v.6 Statsoft © ). This analysis required data points equally spaced in time [12,13,54]. Each temporal data set was transformed into sine curves of the same amplitude or harmonic frequencies [55] and it was represented in a periodogram.…”

Section: Discussionmentioning

confidence: 99%

“…Parasites of aquatic organisms are sensitive to changes in abiotic factors, such as temperature [9,10,11], precipitation [12,13], salinity [14,15], hurricanes [16], the North Atlantic Oscillation (NAO) [8], EN [6] and ENSO [8]. Several studies have shown that climate change strongly affects performance, population dynamics and distribution of marine organisms [6,17,18,19].…”

Section: Introductionmentioning

confidence: 99%

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The 2015-2016 El Niño increased infection parameters of copepods on Eastern Tropical Pacific dolphinfish populations

et al. 2020

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The oceanographic conditions of the Pacific Ocean are largely modified by El Niño (EN), affecting several ecological processes. Parasites and other marine organisms respond to environmental variation, but the influence of the EN cycle on the seasonal variation of parasitic copepods has not been yet evaluated. We analysed the relation between infection parameters (prevalence and mean intensity) of the widespread parasitic copepods Caligus bonito and Charopinopsis quaternia in the dolphinfish Coryphaena hippurus and oceanography during the strong 2015-16 EN. Fish were collected from capture fisheries on the Ecuadorian coast (Tropical Eastern Pacific) over a 2-year period. Variations of sea surface temperature (SST), salinity, chlorophyll a (Chl-a), Oceanic Niño Index (ONI), total host length (TL) and monthly infection parameters of both copepod species were analysed using time series and cross-correlations. We used the generalised additive models for determine the relationship between environmental variables and infection parameters. The total body length of the ovigerous females and the length of the eggs of C. bonito were measured in both periods. Infection parameters of both C. bonito and Ch. quaternia showed seasonal and annual patterns associated with the variation of environmental variables examined (SST, salinity, Chl-a and ONI 1+2). Infection parameters of both copepod species were significantly correlated with ONI 1+2, SST, TL and Chl-a throughout the GAMLSS model, and the explained deviance contribution ranged from 16%-36%. Our results suggest than an anomaly higher than +0.5˚C triggers a risen in infection parameters of both parasitic copepods. This risen could be related to increases in egg length, female numbers and the total length of the ovigerous females in EN period. This study provides the first evidence showing that tropical parasitic copepods are sensitive to the influence of EN event, especially from SST variations. The observed behaviour of parasitic copepods likely affects the host populations and structure of the marine ecosystem at different scales.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The 2015-2016 El Niño increased infection parameters of copepods on Eastern Tropical Pacific dolphinfish populations

et al. 2020

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“…The strength of the interactions depends on many different factors, such as host behavior (Bush and Malenke 2008), the infection dose to which the host is exposed (Fellous and Koella 2009), or the order in which multiple infections occur (Lohr et al 2010;Hoverman et al 2013). Besides these intrinsic host properties, parasites can be largely affected by the environmental factors to which their hosts are exposed (Wolinska and King 2009;Karvonen et al 2010;Pech et al 2010;Vale et al 2011). Evidence for the relevance of these factors, with respect to single species infections, is amply present in a number of different systems: bacteria-phage interactions (Forde et al 2004), plant-pathogen interactions (Laine and Tellier 2008;Burdon and Thrall 2009), and invertebrate-pathogen interactions (McKenzie and Townsend 2007;Garbutt et al 2014;Hall et al 2013; for an overview see Schmid-Hempel 2011).…”

Section: Introductionmentioning

confidence: 99%

Diet quality determines interspecific parasite interactions in host populations

Lange

Reuter

Ebert

et al. 2014

Ecology and Evolution

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The widespread occurrence of multiple infections and the often vast range of nutritional resources for their hosts allow that interspecific parasite interactions in natural host populations might be determined by host diet quality. Nevertheless, the role of diet quality with respect to multispecies parasite interactions on host population level is not clear. We here tested the effect of host population diet quality on the parasite community in an experimental study using Daphnia populations. We studied the effect of diet quality on Daphnia population demography and the interactions in multispecies parasite infections of this freshwater crustacean host. The results of our experiment show that the fitness of a low-virulent microsporidian parasite decreased in low, but not in high-host-diet quality conditions. Interestingly, infections with the microsporidium protected Daphnia populations against a more virulent bacterial parasite. The observed interspecific parasite interactions are discussed with respect to the role of diet quality-dependent changes in host fecundity. This study reflects that exploitation competition in multispecies parasite infections is environmentally dependent, more in particular it shows that diet quality affects interspecific parasite competition within a single host and that this can be mediated by host population-level effects.

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“…Prevalence was taken in this study as the number of instances of disease expressed in percentage in a known population, at a designated time, without distinction between old and new cases (Thrusfield 2007). The percentage of infected host (PIH) is defined as the number of hosts of one species infected with one or more infectious agent in a sample divided by the total number of hosts of that species within a discrete time (Pech et al 2010). A Kruskal-Wallis non-parametric ANOvA was used to test differences in histological anomalies between juvenile and adult shrimps and among months.…”

Section: Molecular Methods For Viral Detectionmentioning

confidence: 99%

Diez meses de análisis de las enfermedades en especímenes silvestres de <i>Litopenaeus setiferus</i> en el Sur del Golfo de México

Río-Rodríguez

Pech

Soto-Rodríguez

et al. 2013

RBT

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Diez meses de análisis de las enfermedades en especímenes silvestres de Litopenaeus setiferus en el Sur del Golfo de México. The development of shrimp aquaculture in Mexican coasts of the Gulf of Mexico began to be explored using the Pacific white shrimp Litopenaeus vannamei in the mid 90´s. Many concerns over the risk of disease transmission to the economically important native penaeids, have been the main deterrent for the aquaculture of L. vannamei in the region. Concurrently, more than 10 years of research experience on the aquaculture suitability of the native Litopenaeus setiferus from the Terminos Lagoon, in the Yucatán Peninsula, have been accumulated. The aim of this study was then to determine the seasonal variations of the naturally acquired diseases and the possible detection of exotic pathogens. For this, random subsamples (n~60) of juveniles L. setiferus were collected from monthly captures. In order to detect the widest range of pathogens, including infectious hypodermal and hematopoietic necrosis (IHHNv) and white spot syndrome (WSSv) viruses, both histopathological and molecular methods were employed. Monthly prevalence (%) was calculated for every finding. We were able to detect a total of 16 distinct histological anomalies, most of which the presumptive aetiological agent was readily identified. PCR results for viruses were negative. For some pathogens and symbionts, the prevalence was significantly different between the adult and juvenile populations. Prevalence of diseases tended to be higher in juvenile shrimp than in adults. The results of this study indicated that L. setiferus carry a wide variety of pathogens and symbionts that seem to be endemic to penaeids of the Gulf of Mexico, and those juveniles were more conspicuous to acquire pathogens and symbionts than adults. Rev. Biol. Trop. 61 (3): 1175-1188. Epub 2013 September 01.

show abstract

Rainfall induces time-lagged changes in the proportion of tropical aquatic hosts infected with metazoan parasites

Cited by 26 publications

References 33 publications

The 2015-2016 El Niño increased infection parameters of copepods on Eastern Tropical Pacific dolphinfish populations

The 2015-2016 El Niño increased infection parameters of copepods on Eastern Tropical Pacific dolphinfish populations

Diet quality determines interspecific parasite interactions in host populations

Diez meses de análisis de las enfermedades en especímenes silvestres de <i>Litopenaeus setiferus</i> en el Sur del Golfo de México

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