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No. de sistema: 000041989

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008 _ _ 170316m20179999xx^^r^p^^^^^^z0^^^a0eng^d
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245 0 0 a| Annual egg production rates of calanoid copepod species on the continental shelf of the Eastern Tropical Pacific off Mexico
506 _ _ a| Acceso electrónico sólo para usuarios de ECOSUR
520 1 _ a| We provide the first estimations of calanoid copepod egg production rates (EPR) in the Eastern Tropical Pacific over an annual cycle (January–December 2011). Gravid females were collected twice monthly and incubated for 12 h without food to estimate EPR, weight-specific fecundity (Gf), spawning success (SS, percentage of females to spawn out of the total species incubated per month and season) and egg hatching success (EHS). This study reports the average EPR of 10 species and the monthly EPR and Gf of four planktonic calanoid copepods (Centropages furcatus, Temora discaudata, Pontellina sobrina, and Nannocalanus minor) that spawned with enough frequency to infer their seasonal reproductive patterns. These species showed distinct seasonal reproductive strategies. Most copepod species spawned sporadically with large EPR variability, while three copepod species reproduced throughout the year (C. furcatus, T. discaudata and P. sobrina) and N. minor spawned only during the mixed period (Feb–May). The four species had relatively similar average EPR (C. furcatus 16, T. discaudata 18, P. sobrina 13, and N. minor 12 eggs fem−¹ day−¹). These are the first EPR estimations of P. sobrina and its previously known reproductive period is expanded. A Canonical Correspondence Analysis (CCA) was used to analyze EPR and species abundance of all calanoid copepods (40 spp.) collected throughout the time series in relation to temperature, salinity, mixed layer depth (MLD), dissolved oxygen, and chlorophyll a (Chl-a) concentrations to identify the variables that best explained the copepod abundance variability.
520 1 _ a| Temperature, Chl-a, and salinity had the strongest effect on the biological variables, linked to seasonal and episodic upwelling-downwelling processes in the surveyed area. As a result of moderate upwelling events and seasonal variation of environmental conditions, it appears relatively few species are capable of maintaining continuous reproduction under the relatively higher temperatures and strong fluctuations of food availability that exist in this coastal habitat of the Eastern Tropical Pacific.
650 _ 4 a| Copépodos
650 _ 4 a| Centropages furcatus
650 _ 4 a| Temora discaudata
650 _ 4 a| Nannocalanus minor
650 _ 4 a| Pontellina sobrina
650 _ 4 a| Producción de huevos
650 _ 4 a| Variables ambientales
650 _ 4 a| Zoogeografía
650 _ 4 a| Zooplancton
651 _ 4 a| Bahía de Navidad (Jalisco, México)
651 _ 4 a| Océano Pacífico
700 1 _ a| Kozak, Eva Rose
e| autora
n| 55448061600
700 1 _ a| Franco Gordo, María del Carmen
c| Dra.
e| autora
700 1 _ a| Palomares García, Ricardo
e| autor
700 1 _ a| Gómez Gutiérrez, Jaime
e| autor
700 1 _ a| Suárez Morales, Eduardo
e| autor
773 0 _
t| Estuarine, Coastal and Shelf Science
g| Vol. 184 (January 2017), p. 138–150
x| 0272-7714
900 _ _ a| Solicítelo con su bibliotecario/a
902 _ _ a| GOG / MM
904 _ _ a| Marzo 2017
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
LNG eng
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*Solicítelo con su bibliotecario/a
Annual egg production rates of calanoid copepod species on the continental shelf of the Eastern Tropical Pacific off Mexico
Kozak, Eva Rose (autora)
Franco Gordo, María del Carmen (autora)
Palomares García, Ricardo (autor)
Gómez Gutiérrez, Jaime (autor)
Suárez Morales, Eduardo (autor)
Nota: Acceso electrónico sólo para usuarios de ECOSUR
Contenido en: Estuarine, Coastal and Shelf Science. Vol. 184 (January 2017), p. 138–150. ISSN: 0272-7714
No. de sistema: 41989
Tipo: Artículo
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Inglés

"We provide the first estimations of calanoid copepod egg production rates (EPR) in the Eastern Tropical Pacific over an annual cycle (January–December 2011). Gravid females were collected twice monthly and incubated for 12 h without food to estimate EPR, weight-specific fecundity (Gf), spawning success (SS, percentage of females to spawn out of the total species incubated per month and season) and egg hatching success (EHS). This study reports the average EPR of 10 species and the monthly EPR and Gf of four planktonic calanoid copepods (Centropages furcatus, Temora discaudata, Pontellina sobrina, and Nannocalanus minor) that spawned with enough frequency to infer their seasonal reproductive patterns. These species showed distinct seasonal reproductive strategies. Most copepod species spawned sporadically with large EPR variability, while three copepod species reproduced throughout the year (C. furcatus, T. discaudata and P. sobrina) and N. minor spawned only during the mixed period (Feb–May). The four species had relatively similar average EPR (C. furcatus 16, T. discaudata 18, P. sobrina 13, and N. minor 12 eggs fem−¹ day−¹). These are the first EPR estimations of P. sobrina and its previously known reproductive period is expanded. A Canonical Correspondence Analysis (CCA) was used to analyze EPR and species abundance of all calanoid copepods (40 spp.) collected throughout the time series in relation to temperature, salinity, mixed layer depth (MLD), dissolved oxygen, and chlorophyll a (Chl-a) concentrations to identify the variables that best explained the copepod abundance variability."

"Temperature, Chl-a, and salinity had the strongest effect on the biological variables, linked to seasonal and episodic upwelling-downwelling processes in the surveyed area. As a result of moderate upwelling events and seasonal variation of environmental conditions, it appears relatively few species are capable of maintaining continuous reproduction under the relatively higher temperatures and strong fluctuations of food availability that exist in this coastal habitat of the Eastern Tropical Pacific."