Multivariate characterization of spawning and larval environments of small pelagic fishes in the Gulf of California

Aceves-Medina, Gerardo; Palomares-García, Ricardo; Gómez‐Gutiérrez, Jaime; Robinson, Carlos J.; Saldierna-Martínez, Ricardo J.

doi:10.1093/plankt/fbp056

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…The difference in prey requirements determined in laboratory and field studies may arise from the inability of net catches to sufficiently characterize in situ prey concentrations actually experienced by early feeding larvae in the wild that forage within patchy prey environments (MacKenzie & Kiørboe 1995, Peck et al 2013). There is strong evidence from field studies of the importance of high prey concentrations in habitats, as shown for the Pacific sardine Sardinops sagax, which preferentially spawns in habitats and during periods of enhanced food availability (Aceves-Medina et al 2009), which has been interpreted to be a reproductive strategy to enhance the probability of larval survival (Riveiro et al 2000).…”

Section: Vital Rates and Metabolic Balancementioning

confidence: 99%

Effects of prey concentration on ingestion rates of European sardine Sardina pilchardus larvae in the laboratory

Caldeira¹,

Santos²,

Ré³

et al. 2014

Mar. Ecol. Prog. Ser.

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The quantification of prey requirements for larval fish is essential to understand how environmental factors act to restrict suitable habitats and recruitment success in marine fish. The effect of prey concentration on ingestion rates of the European sardine Sardina pilchardus was estimated for larvae through 50 d post-hatch (dph) under controlled laboratory conditions at 15°C. Prey were nauplii and copepodites of the calanoid copepod Acartia grani, which were provided to larvae at 3 concentrations (0.5, 2 and 6 nauplii ml −1 and 0.1, 0.5 and 1 copepodites ml −1 ). Larvae were not able to capture copepod nauplii at the beginning of exogenous feeding, suggesting that early larvae depend on smaller prey types and/or less mobile prey than copepods. The mean size of prey found in the guts of sardine larvae increased from 145 to 348 μm for larvae of total length increasing from 6 to 18 mm, respectively. Maximum ingestion rates (232 ± 8.0 μg C larva −1 h −1 ) were reached at the highest prey concentration diet for individuals > 40 dph (1500 to 2500 μg C dry weight). These feeding rates are higher than values previously reported for the larvae of small pelagic fish. The inability of sardine larvae to feed at low prey concentrations, particularly during the first weeks of life, suggests that this species relies on and is adapted to forage within dense prey patches. Given this feeding strategy, bottom-up processes causing food limitation may strongly impact the survival and growth of sardine larvae.

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Section: Vital Rates and Metabolic Balancementioning

confidence: 99%

Effects of prey concentration on ingestion rates of European sardine Sardina pilchardus larvae in the laboratory

Caldeira¹,

Santos²,

Ré³

et al. 2014

Mar. Ecol. Prog. Ser.

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“…3a). Salinity and average density showed less variation than SST (34.71 and 24.7 kg m -3 , respectively); however, density decreased as a result of the increase in SST (2005 and2009) (Figs. 3a, 3b and 3c).…”

Section: Resultsmentioning

confidence: 95%

“…In this case, food production determines survival and reproductive success of small pelagic larvae (Lasker 1978, Lynn 2003, Logerwell and Smith 2001, McClatchie et al 2007, Planque et al 2007, Aceves-Medina et al 2009). Survival of first-feeding larvae improves when there is food of an adequate size and layered concentrations associated with a stable water column (Lasker 1978).…”

Section: Discussionmentioning

confidence: 99%

“…The spatial range and location of spawning can be critical for eggs and larvae due to interan-nual changes in population structure and geographic variations in environmental conditions (Planque et al 2007, Smith and Moser 2003, Emmett et al 2005, Ibaibarriaga et al 2007, Coombs et al 2006. However, few comprehensive surveys of eggs and larvae are available to determine preferred spawning locations and little is known of the stock structures of various important species (Agostini and Bakun 2002), which are influenced by physical processes that provide favourable habitat requirements for larval growth and survival (Lasker 1978, Parrish et al 1981, Bakun 1996, Logerwell and Smith 2001, Lynn 2003, McClatchie et al 2007, Planque et al 2007, Aceves-Medina et al 2009). …”

Section: Introductionmentioning

confidence: 99%

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Abundance patterns of early stages of the Pacific sardine (<i>Sardinops sagax</i>) during a cooling period in a coastal lagoon south of the California Current

et al. 2012

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SUMMARY: Abundance patterns of eggs and larvae of the Pacific sardine, Sardinops sagax (Jenyns, 1842), in Bahía Magdalena, Baja California Sur, were analysed during a cooling period south of the California Current from 2005 to 2009. The thermohaline characteristics and zooplankton abundance were good descriptors of the potential spawning habitat. Individual quotient analyses showed a predominance of eggs and larvae within a SST range of 16 to 18°C, at low salinities (33.9-34.1) and at low density gradient variability (0.009-0.029), associated with deeper waters (25-40 m) near the main entrance, where the transparency was intermediate (6-8 m) and zooplankton abundance was relatively high (>316 ml/1000 m 3 ). Increments within different class intervals meant that neither dissolved inorganic nitrogen (DIN), phosphates nor chlorophyll a predominated. The large interannual fluctuations in sardine spawning activity and preferential temperatures observed in historical and recent data suggest that two sardine stocks spawn in Bahia Magdalena: one stock spawned in the period 1981-1989 and one stock spawned in the period 1997-2009. The influence of cooling and warming periods as additional components of the regional environmental framework is analysed and discussed.Keywords: Pacific sardine, small pelagic fishes, fish eggs and larvae, hydrologic conditions, Bahia Magdalena, California Current. RESUMEN: Patrones de abundancia de los estadios tempranos de la sardina del Pacífico (SardinopS Sagax) durante un periodo de enfriamiento en una laguna costera al sur de la corriente de California. -Los patrones de abundancia de huevos y larvas de la sardina del Pacífico, Sardinops sagax, en Bahía Magdalena, Baja California Sur, fueron analizados durante un periodo de enfriamiento al sur de la Corriente de California de 2005 a 2009. La combinación de las características termohalinas y abundancia del zooplancton fueron buenos indicadores del hábitat potencial del desove. El análisis individual de cocientes mostró una predominancia de huevos y larvas en el intervalo de temperatura superficial del mar entre 16 y 18°C, a baja salinidad (33.9-34.1), y valores bajos de la diferencia del gradiente de densidad (0.009-0.029) asociados a las aguas profundas (25-40 m) cercanas a la entrada principal, donde la profundidad de transparencia fue intermedia (6-8 m), y la abundancia del zooplancton fue relativamente alta (>316 ml/1000 m 3 ). El Nitrógeno Inorgánico Disuelto (DIN), fosfatos y clorofila a no revelan una clara predominancia, debido a incrementos en diferentes intervalos de clases. La amplia fluctuación interanual de la actividad reproductiva de la sardina y temperaturas preferenciales observadas en datos históricos y recientes sugiere la reproducción de dos poblaciones en Bahía Magdalena (1981-1989 y 1997-2009). La influencia de los periodos de enfriamiento y calentamiento como complemento de marco ambiental regional es analizada y discutida.Palabras clave: sardina del Pacífico, peces pelágicos pequeños, huevos y larvas, condiciones hid...

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“…The dominant species have a seasonal spawning period, as in the case for the dominant species registered in this study: Engraulis mordax, Citharichtys fragilis, Leuroglossus stilbius and Sardinops sagax . These species spawn from the last days of November to the spring months (Green-Ruiz & Hinojosa-Corona, 1997; Hammann et al ., 1998; Moser et al ., 1974; Aceves et al ., 2009; Sánchez-Velasco et al ., 2009). Therefore, this study is representative of winter, and shows relations between the mesoscale hydrographic structures and the fish larval habitats, which were not known.…”

Section: Discussionmentioning

confidence: 99%

The effects of a tidal-mixing front on the distribution of larval fish habitats in a semi-enclosed sea during winter

2014

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We examined the effect of a tidal-mixing front on the three-dimensional distribution of larval fish habitats (LFHs) in the Midriff Archipelago Region in the Gulf of California during winter. Zooplankton and environmental variables were sampled from 0 to 200 m in 50 m strata. Four LFHs were defined in association with the front, two on the northern side and two on the southern side. The northern LFHs were: (1) the Mainland Shelf Habitat, located from the surface to 100 m depth on the north-east mainland shelf, characterized mainly by the presence of Citharichtys fragilis; and (2) the Wide Distribution Habitat, extending from north-west to south across the front from the surface to 200 m depth, dominated by the ubiquitous Engraulis mordax. The southern LFHs were: (3) the Eddy Zone Habitat, defined nearly on an anticyclonic eddy, with the highest larval abundance and richness from the surface to 100 m depth, dominated by Leuroglossus stilbius; and (4) the Southern Gulf Habitat, associated with low temperature waters from the southern Gulf of California, dominated by southern-gulf species (e.g. Scomber japonicus and Sardinops sagax). Despite the weak stratification and low thermal contrast ( 1.58C) across the south front compared to summer ( 38C), our results demonstrate that the frontal zone may influence the formation of planktonic habitats even during generally homogeneous periods, which may also be relevant in other regions of the world.

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Multivariate characterization of spawning and larval environments of small pelagic fishes in the Gulf of California

Cited by 10 publications

References 23 publications

Effects of prey concentration on ingestion rates of European sardine Sardina pilchardus larvae in the laboratory

Effects of prey concentration on ingestion rates of European sardine Sardina pilchardus larvae in the laboratory

Abundance patterns of early stages of the Pacific sardine (<i>Sardinops sagax</i>) during a cooling period in a coastal lagoon south of the California Current

The effects of a tidal-mixing front on the distribution of larval fish habitats in a semi-enclosed sea during winter

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