Standing stock of Nyctiphanes simplex in the southern region of the California Current System

Silva-Dávila, Roxana De; Palomares-García, Ricardo; Martínez-López, Aída; Carballido-Carranza, M. A.

doi:10.1093/plankt/24.10.1057

Cited by 13 publications

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“…Because different methodologies and development phases (larvae, juvenile and adults) were used in previous estimations of N. simplex biomass production rates, e.g. using only preserved krill samples (Lavaniegos 1995, Gómez-Gutiérrez et al 1996, De Silva-Dávila & Palomares-García 1998, De Silva-Dávila et al 2002, it is also difficult to compare biomass production on both sides of the Baja California peninsula. A table summarizing all previous N. simplex body growth estimations is shown in De Silva- Dávila et al (2002).…”

Section: Nyctiphanes Simplex Biomass and Biomass Production Rates In mentioning

confidence: 99%

“…using only preserved krill samples (Lavaniegos 1995, Gómez-Gutiérrez et al 1996, De Silva-Dávila & Palomares-García 1998, De Silva-Dávila et al 2002, it is also difficult to compare biomass production on both sides of the Baja California peninsula. A table summarizing all previous N. simplex body growth estimations is shown in De Silva- Dávila et al (2002). In the Gulf of California, we estimated a total annual juvenile and adult biomass production rate (body growth, MPR, and EPR) of 71 mg DW m −3 yr ) (Gómez-Gutiérrez et al 1996).…”

Section: Nyctiphanes Simplex Biomass and Biomass Production Rates In mentioning

confidence: 99%

“…Multiple studies have estimated Nyctiphanes simplex biomass production rates along the west coast of Baja California peninsula (Lavaniegos 1995, Gómez-Gutiérrez et al 1996, De Silva-Dávila et al 2002 and in La Paz Bay (southwestern Gulf of California; De Silva-Dávila & Palomares-García 1998). However, all these studies estimated N. simplex productivity using only preserved specimens without any direct measurements of vital rates.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal growth, molt, and egg production rates of Nyctiphanes simplex (Crustacea: Euphausiacea) juveniles and adults in the Gulf of California

Gutiérrez¹,

Martínez-Gómez²,

Robinson³

2012

Mar. Ecol. Prog. Ser.

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Section: Nyctiphanes Simplex Biomass and Biomass Production Rates In mentioning

confidence: 99%

Section: Nyctiphanes Simplex Biomass and Biomass Production Rates In mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal growth, molt, and egg production rates of Nyctiphanes simplex (Crustacea: Euphausiacea) juveniles and adults in the Gulf of California

Gutiérrez¹,

Martínez-Gómez²,

Robinson³

2012

Mar. Ecol. Prog. Ser.

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“…Lavaniegos (1995) made the only study that simultaneously estimated these three components of N. simplex's secondary productivity. Body growth rate had been most recently estimated for this species (De Silva-Dá vila and Palomares-García, 1998;De Silva-Dá vila et al, 2002;Gó mez-Gutié rrez et al, 1996). Several studies have shown that Nyctiphanes female reproduction accounts for nearly 2% of total secondary production (Hosie and Ritz, 1983;Lavaniegos, 1995), although now it is known that this proportion of energy is close to 7% (Gó mez-Gutié rrez and Robinson, 2005).…”

Section: Introductionmentioning

confidence: 99%

Biology of the subtropical sac-spawning euphausiid Nyctiphanes simplex in the northwestern seas of Mexico: Interbrood period, gonad development, and lipid content

Gómez‐Gutiérrez

Rodrı́guez-Jaramillo²,

Ángel-Rodríguez³

et al. 2010

Deep Sea Research Part II: Topical Studies in Oceanography

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a b s t r a c tInterbrood period, gonad development, and total lipid content throughout the oogenesis and spermatogenesis processes of the subtropical euphausiid Nyctiphanes simplex were studied. Specimens were collected during six oceanographic cruises in Bahía Magdalena (March, July, and December 2004) and in the Gulf of California (November 2005 and January and July 2007). Females attained first spawning when $ 7.5 mm total length (4 52 days old). Histological evidence indicates that N. simplex females have group-synchronous ovaries, able to produce four broods per gonadic cycle, since ovigerous females develop simultaneously in three and four distinct substages (Oc1, Oc2, Oc3, and Oc4) in their gonads. Once females mature, as shown by pale pink gonads, they may reabsorb their gonads in o 4 days. Direct observations indicate that after a variable resting period, the formation of oogonia to vitellogenesis takes $ 3 days, investing $ 8% (4-14%) of weight-specific carbon body weight to reproduction (lipid approach) with an average interbrood period of 10 days (range: 7-26 days, estimated by three distinct methods). About 22% of the ovigerous females in the metanauplius stage show gonad development in vitellogenesis, likely spawning between 7 and 9 days. The rest of the female population have an interbrood period that is considerably 4 10 days. Embryonic development in the ovigerous sac last o 3 days (16 1C), hatching always as nauplius (usually 100% hatching success); the metanauplii are released from the ovigerous sac in a median of 5 days after spawning. Although sacspawning euphausiid species may have comparatively lower total fecundity than broadcast-spawning species, they seem to have relatively similar reproductive effort and higher hatching success that increases larval recruitment rates, compared to similar size temperate broadcast-spawners. This partially explains why sac-spawners of the genera Nyctiphanes, Nematoscelis, and Pseudeuphausia are numerically dominant euphausiids in several highly eutrophic temperate, subtropical, and tropical ecosystems. N. simplex males have a continuous spermatogenesis after they attain size at first maturity; continuously allocating $ 5.4% of weight-specific carbon to reproduction, results that are significantly different than previous assumptions that euphausiid male spermatogenesis is energetically insignificant.

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“…En la CSO, los grupos obtenidos a partir del análisis de correspondencia canónica se relacionaron con los 2 ambientes predominantes: el productivo y frío de primavera y el poco productivo y cálido de otoño. Sin embargo, la gran mayoría de los taxones (grupo 2) no se distribuyó en una única masa de agua, lo cual refleja la ausencia de correlaciones con la temperatura y salinidad, así como la presencia característica de una variabilidad oceanográfica con típicamente 3 masas de agua cálidas, que es alta comparada con la registrada en la región central de la penín-sula y más al norte (Lynn y Simpson 1987, De Silva-Dávila et al 2002. Una amplia variedad de respuestas individuales de las especies a la estacionalidad del medio es de esperarse, debido a que cada especie o grupos de especies (neríticas, oceánicas) presentan estrategias reproductivas diferentes (Moreno et al 2009).…”

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Seasonal changes in paralarval cephalopod communities on the southwest coast of Baja California Sur (spring and autumn 2003)

2018

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A. We recorded seasonal changes in the paralarval cephalopod communities collected off the southwestern coast of Baja California Sur, Mexico, during 2003. Simultaneous surface and oblique trawls were carried out with CalCOFI-type nets and CTD casts during spring and autumn 2003 on board the R/V Río Suchiate (Secretaría de Marina), at 85 sampling stations (Magdalena Bay to Cape San Lucas). The paralarval cephalopod community predominantly showed tropical affinity in both seasons. During autumn, 11 tropical taxa, 2 cosmopolitan taxa, and one temperate taxon were incorporated to the paralarval community recorded previously in spring and were associated with the decrease in Subarctic Water and the entrance of warm water masses to the study region, modifying the community indexes between seasons. The canonical correspondence analysis showed 2 groups significantly correlated with chlorophyll a concentrations and zooplankton volumes. Oblique tows provide better information on the paralarval cephalopod community, while surface tows can be an efficient method for monitoring and evaluating the hatching areas of the jumbo Pacific squid Dosidicus gigas through their paralarvae, which are included in the Sthenoteuthis oualaniensis-Dosidicus gigas complex (SD complex).Key words: paralarvae, community structure, SD complex, Baja California Sur. R .Se registró el cambio estacional en las comunidades de paralarvas de cefalópodos recolectadas frente a la costa suroccidental de Baja California Sur, México, durante 2003. Para lo anterior, se realizaron arrastres superficiales y oblicuos simultáneos con redes tipo CalCOFI y lances de CTD en 85 estaciones de muestreo (de bahía Magdalena a cabo San Lucas) durante primavera y otoño de 2003 a bordo del B/I Río Suchiate (Secretaría de Marina). La comunidad de paralarvas de cefalópodos fue mayormente tropical en ambas temporadas. Durante el otoño se adicionaron 11 taxones tropicales, 2 cosmopolitas y 1 templado a la comunidad registrada previamente en primavera, todos relacionados con la disminución de Agua Subártica y el ingreso de masas de agua cálida a la región; esto modificó los índices comunitarios entre las temporadas. El análisis de correspondencia canónica mostró la formación de 2 grupos correlacionados significativamente con la concentración de clorofila a y el volumen de zooplancton. Los arrastres oblicuos dan mayor información sobre la comunidad de paralarvas, mientras que los superficiales resultan eficientes para el seguimiento y la evaluación de las áreas de eclosión del calamar gigante del Pacífico, Dosidicus gigas, a través de sus paralarvas incluidas en el complejo Sthenoteuthis oualaniensis-Dosidicus gigas (complejo SD).Palabras clave: paralarvas, estructura de la comunidad, complejo SD, Baja California Sur.

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Standing stock of Nyctiphanes simplex in the southern region of the California Current System

Cited by 13 publications

References 13 publications

Seasonal growth, molt, and egg production rates of Nyctiphanes simplex (Crustacea: Euphausiacea) juveniles and adults in the Gulf of California

Seasonal growth, molt, and egg production rates of Nyctiphanes simplex (Crustacea: Euphausiacea) juveniles and adults in the Gulf of California

Biology of the subtropical sac-spawning euphausiid Nyctiphanes simplex in the northwestern seas of Mexico: Interbrood period, gonad development, and lipid content

Seasonal changes in paralarval cephalopod communities on the southwest coast of Baja California Sur (spring and autumn 2003)

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