Cerrar

No. de sistema: 000060467

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 200525m20209999xx^^r^p^o^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| s-ec---
044 _ _ a| xx
245 0 4 a| The 2015-2016 El Niño increased infection parameters of copepods on Eastern Tropical Pacific dolphinfish populations
506 _ _ a| Acceso en línea sin restricciones
520 1 _ a| 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.
520 1 _ a| 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.
530 _ _ a| Disponible en línea
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Copépodos
650 _ 4 a| Caligus bonito
650 _ 4 a| Charopinopsis quaternia
650 _ 4 a| Coryphaena hippurus
650 _ 4 a| Parásitos de peces
650 _ 4 a| Peces marinos
650 _ 4 a| El Niño oscilación del Sur
650 _ 4 a| Variables ambientales
650 _ 4 a| Oceanografía
651 _ 4 a| Playita Mía, Manta (Manabí, Ecuador)
700 1 _ a| Santana Piñeros, Ana María
e| autora
700 1 _ a| Cruz Quintana, Yanis
e| autora
700 1 _ a| May Tec, Ana Luisa
e| autora
700 1 _ a| Mera Loor, Geormery
e| autora
700 1 _ a| Aguirre Macedo, María Leopoldina
e| autora
700 1 _ a| Suárez Morales, Eduardo
e| autor
700 1 _ a| González Solís, David
e| autor
773 0 _
t| PLoS ONE
g| Volumen 15, número 5, artículo e0232737 (May 2020), p. 1-19
x| 1932-6203
856 4 1 u| https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0232737
z| Artículo electrónico
902 _ _ a| BG / MM
904 _ _ a| Mayo 2020
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
LNG eng
Cerrar
The 2015-2016 El Niño increased infection parameters of copepods on Eastern Tropical Pacific dolphinfish populations
Santana Piñeros, Ana María (autora)
Cruz Quintana, Yanis (autora)
May Tec, Ana Luisa (autora)
Mera Loor, Geormery (autora)
Aguirre Macedo, María Leopoldina (autora)
Suárez Morales, Eduardo (autor)
González Solís, David (autor)
Nota: Disponible en línea
Acceso en línea sin restricciones
Contenido en: PLoS ONE. Volumen 15, número 5, artículo e0232737 (May 2020), p. 1-19. ISSN: 1932-6203
No. de sistema: 60467
Tipo: Artículo
PDF


Inglés

"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."


  • Adobe Acrobat profesional 6.0 o superior