An Experimental Study of the Effect of Temperature on the Incubation Time, Development, and Growth of Pacific Sardine Embryos and Larvae

Lasker, Reuben

doi:10.2307/1441033

Cited by 86 publications

(53 citation statements)

References 2 publications

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“…January to May, 13 to 17°C) were also performed and generated similar results. Both laboratory and field observations report temperatures >13°C to be suitable for sardine egg and larval survival (Lasker 1964, Smith 1978, Parrish et al 1989, Bentley et al 1996. The upper limit of spawning is less clear, but hovers around 16°C for the California sardine stock (Lluch-Belda et al 1991).…”

Section: Methodsmentioning

confidence: 99%

Larval stage controls on Pacific sardine recruitment variability: high zooplankton abundance linked to poor reproductive success

Agostini¹,

Bakun²,

Francis³

2007

Mar. Ecol. Prog. Ser.

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Sardines inhabit some of the most highly productive areas of the ocean (upwelling areas). Despite this, those in the eastern Pacific appear to thrive during warm years characterized by low productivity. Among the explanations for the apparent sardine success during warm years are: (1) lowered predation pressure and (2) access to waters with higher food availability. We examine zooplankton abundance in the sardine Sardinops sagax larval habitat off the coast of southern California. According to our results, increased food availability (represented here by zooplankton abundance) cannot alone explain successful sardine year classes. It appears that zooplankton abundance may also be an index of predation pressure on larval stages, combining potential effects of (1) direct predation by zooplankton predators and (2) increased attraction of zooplanktivorus nekton. Accordingly, decreased predation pressure during warm years may be a major factor allowing bursts in sardine recruitment. These results suggest a need for modification of the traditional rather linear view of food web energy transfers. This view may neglect potential nonlinear feedbacks introduced in the food web by mortalities on the early life stages of higher trophic level organisms inflicted or mediated by lower trophic level organisms. KEY WORDS: Predation · Recruitment · Sardine · Trophic control · ZooplanktonResale or republication not permitted without written consent of the publisher

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Section: Methodsmentioning

confidence: 99%

Larval stage controls on Pacific sardine recruitment variability: high zooplankton abundance linked to poor reproductive success

Agostini¹,

Bakun²,

Francis³

2007

Mar. Ecol. Prog. Ser.

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“…The speed of yolk depletion depends on the surrounding water temperature. As soon as endogenous reserves have been consumed and morphological changes, such as a functional visual system, functional jaw formations and mouth gap opening allow successful foraging (Lasker 1964), prey availability is essential for the larvae. Therefore, knowledge about the duration and timing of early life stages is a prerequisite for understanding and interpreting match and mismatch situations between larval predators and their prey (Cushing 1972).…”

Section: Introductionmentioning

confidence: 99%

The influence of temperature on the development of Baltic Sea sprat (Sprattus sprattus) eggs and yolk sac larvae

et al. 2008

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In spring 2004 and 2005 we performed two sets of experiments with Baltic sprat (Sprattus sprattus balticus Schneider) eggs and larvae from the Bornholm Basin simulating ten different temperature scenarios. The goal of the present study was to analyse and parameterise temperature effects on the duration of developmental stages, on the timing of important ontogenetic transitions, growth during the yolk sac phase as well as on the survival success of eggs and early larval stages. Egg development and hatching showed exponential temperature dependence. No hatching was observed above 14.7°C and hatching success was significantly reduced below 3.4°C. Time to eye pigmentation, as a proxy for mouth gape opening, decreased with increasing temperatures from 17 days post hatch at 3.4°C to 7 days at 13°C whereas the larval yolk sac phase was shortened from 20 to 10 days at 3.8 and 10°C respectively. Maximum survival duration of non-fed larvae was 25 days at 6.8°C. Comparing the experimental results of Baltic sprat with existing information on sprat from the English Channel and North Sea differences were detected in egg development rate, thermal adaptation and in yolk sac depletion rate (YSDR). Sprat eggs from the English Channel showed significantly faster development and the potential to develop at temperatures higher than 14.7°C.North Sea sprat larvae were found to have a lower YSDR compared to larvae from the Baltic Sea. In light of the predictions for global warming, Baltic sprat stocks could experience improved conditions for egg development and survival.

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“…Resale or republication not permitted without written consent of the publisher hatching and accelerate the development of larval attributes, such as the pigmentation of the eye and the formation of the jaw (Lasker 1964). Generally, larvae incubated at higher temperatures are shorter at the time of hatching.…”

Section: Introductionmentioning

confidence: 99%

Inter-population differences in temperature effects on Engraulis ringens yolk-sac larvae

Llanos-Rivera¹,

Castro²

2006

Mar. Ecol. Prog. Ser.

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An Experimental Study of the Effect of Temperature on the Incubation Time, Development, and Growth of Pacific Sardine Embryos and Larvae

Cited by 86 publications

References 2 publications

Larval stage controls on Pacific sardine recruitment variability: high zooplankton abundance linked to poor reproductive success

Larval stage controls on Pacific sardine recruitment variability: high zooplankton abundance linked to poor reproductive success

The influence of temperature on the development of Baltic Sea sprat (Sprattus sprattus) eggs and yolk sac larvae

Inter-population differences in temperature effects on Engraulis ringens yolk-sac larvae

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