Changes in Embryonic Development and Hatching in<i>Chionoecetes opilio</i>(Snow Crab) With Variation in Incubation Temperature

Webb, Joel B.; Eckert, Ginny L.; Shirley, Thomas C.; Tamone, Sherry L.

doi:10.2307/25066619

Cited by 50 publications

(39 citation statements)

References 20 publications

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“…Along the Aleutian Islands, most mature females are distributed at depths between about 300 and 500 m (Blau et al, 1996) where temperatures vary from about 3.5 to 4.5 throughout the year (Stabeno et al, 2005). The increase in the number of degree-days necessary for development with increasing temperature also occurs in the blue king crab (Stevens et al, 2008) and snow crab (Webb et al, 2007).…”

Section: Discussionmentioning

confidence: 94%

“…Tanner crab (Chionoecetes bairdi) also undergo a diapause of 3-6 months after the gastrula stage (Swiney, 2008). In snow crab, the diapauses seem to be the mechanism for switching between a 1-year and 2-year brooding period (Moriyasu and Lanteigne, 1998;Webb et al, 2007), and, in both snow crab and Tanner crab, the purpose of varying the duration of embryonic development is likely to ensure that larval release coincides with the spring planktonic bloom (Swiney, 2008). It is probable that the golden king crab lacks a diapause stage because its larval development is lecithotrophic.…”

Section: Discussionmentioning

confidence: 99%

“…Climate change, that is, changes in temperature (Webb et al, 2007;Stevens et al, 2008), and ocean acidification (Long et al, 2013a;Long et al, 2013b) can have substantial effects on the early life histories of cold-water crabs. This study provides a baseline for future studies that examine either variability in embryo development times among different populations of the golden king crab or the effect of environmental variables on embryo development.…”

Section: Discussionmentioning

confidence: 99%

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Embryo development in golden king crab (Lithodes aequispinus)

Long¹,

Sant²

2016

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Abstract-The golden king crab (Lithodes aequispinus) is a commercially important species in Alaska waters with an asynchronous reproductive cycle and lecithotrophic larvae. In this study, we qualitatively and quantitatively describe embryo development for this species. Six female multiparous golden king crab were captured from the Aleutian Islands, Alaska, and mated in the laboratory. Their embryos were photographed on average once every 9 days throughout embryogenesis. We describe 13 stages of embryo development on the basis of both visual observations and embryo morphometrics from 1241 measured embryos. Embryo development was similar to that of other cold-water crab species, with the exceptions that 1) golden king crab did not have a diapause and 2) that the average percentage of the area occupied by the yolk at hatching, at about 40%, was much higher than that of other species. Both of these differences likely are attributable to the fact that the larvae are lecithotrophic and, therefore, do not need to synchronize hatch time with planktonic food availability but do need energy reserves to develop to the first crab stage. This study increases our understanding of the reproductive biology of the golden king crab and provides a baseline for future studies of embryo development.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Embryo development in golden king crab (Lithodes aequispinus)

Long¹,

Sant²

2016

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“…The mean dd adjvalue of about 2770 thus represents a rough estimate for predicting the date of larval hatching under a given temperature regime. Applied to the field situations in 2005/ 2006, 2006/2007 and 2007/2008 (and In a number of brachyuran decapods, resting stages (periods of diapause) have been demonstrated in the embryonic development which cannot be shortened significantly by raising the temperature (Wear 1974;Petersen 1995;Moriyasu and Lanteigne 1998;Webb et al 2007). By delaying larval release, resting stages may serve to synchronize larval development with optimal external condition e.g.…”

Section: Embryonic Development/incubation Periodmentioning

confidence: 99%

Potential impact of climate warming on the recruitment of an economically and ecologically important species, the European lobster (Homarus gammarus) at Helgoland, North Sea

Schmalenbach

Franke

2010

Mar Biol

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A laboratory-based study was performed to assess the impact of climate warming on the recruitment of the endangered population of the European lobster (Homarus gammarus) at Helgoland (North Sea, German Bight). Egg-bearing females collected in situ just after spawning in late summer were subjected to various seasonal temperature regimes. Regimes with elevated temperatures (mild winters) resulted in a strong seasonal forward shift of larval hatching. Hatching took place at significantly lower temperatures than under regimes with normal winters. Experiments on larval development across a range of constant temperatures showed that no successful larval development occurred at temperatures below 14°C. Larval survival increased from 9% at 14°C to 80% at 22°C, while duration of larval development decreased correspondingly from 26 to 13 days. We hypothesize that an ongoing warming of the North Sea will strongly affect the recruitment success of the Helgoland lobster, mainly resulting from a decoupling of the seasonal peak appearance of larvae from optimal external conditions (temperature, food availability) for larval development.

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“…We demonstrate here that larvae hatching from larger ''winter eggs'' show higher absolute values of elemental (CHN) and biochemical constituents (lipid, protein) than larvae hatching from smaller ''summer eggs''. In crustaceans, larval traits at hatching are related to key variables associated with embryonic development (Gimé-nez and Anger 2001;Webb et al 2007). For example, the average egg incubation temperature exerts significant effects on the development time and bioenergetics of the embryo and influences the initial larval biomass at hatching (Paschke 1998;Fischer et al 2009).…”

Section: Discussionmentioning

confidence: 99%

Seasonal variations in larval biomass and biochemical composition of brown shrimp, Crangon crangon (Decapoda, Caridea), at hatching

Urzúa

Anger

2012

Helgol Mar Res

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The ''brown shrimp'', Crangon crangon (Linnaeus 1758), is a benthic key species in the North Sea ecosystem, supporting an intense commercial fishery. Its reproductive pattern is characterized by a continuous spawning season from mid-winter to early autumn. During this extended period, C. crangon shows significant seasonal variations in egg size and embryonic biomass, which may influence larval quality at hatching. In the present study, we quantified seasonal changes in dry weight (W) and chemical composition (CHN, protein and lipid) of newly hatched larvae of C. crangon. Our data revealed significant variations, with maximum biomass values at the beginning of the hatching season (February-March), a decrease throughout spring (April-May) and a minimum in summer (June-September). While all absolute values of biomass and biochemical constituents per larva showed highly significant differences between months (P \ 0.001), CHN, protein and lipid concentrations (expressed as percentage values of dry weight) showed only marginally significant differences (P \ 0.05). According to generalized additive models (GAM), key variables of embryonic development exerted significant effects on larval condition at hatching: The larval carbon content (C) was positively correlated with embryonic carbon content shortly after egg-laying (r 2 = 0.60; P \ 0.001) and negatively with the average incubation temperature during the period of embryonic development (r 2 = 0.35; P \ 0.001). Additionally, water temperature (r 2 = 0.57; P \ 0.001) and food availability (phytoplankton C; r 2 = 0.39; P \ 0.001) at the time of hatching were negatively correlated with larval C content at hatching. In conclusion, ''winter larvae'' hatching from larger ''winter eggs'' showed higher initial values of biomass compared to ''summer larvae'' originating from smaller ''summer eggs''. This indicates carry-over effects persisting from the embryonic to the larval phase. Since ''winter larvae'' are more likely exposed to poor nutritional conditions, intraspecific variability in larval biomass at hatching is interpreted as part of an adaptive reproductive strategy compensating for strong seasonality in plankton production and transitory periods of larval food limitation.

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Changes in Embryonic Development and Hatching inChionoecetes opilio(Snow Crab) With Variation in Incubation Temperature

Cited by 50 publications

References 20 publications

Embryo development in golden king crab (Lithodes aequispinus)

Embryo development in golden king crab (Lithodes aequispinus)

Potential impact of climate warming on the recruitment of an economically and ecologically important species, the European lobster (Homarus gammarus) at Helgoland, North Sea

Seasonal variations in larval biomass and biochemical composition of brown shrimp, Crangon crangon (Decapoda, Caridea), at hatching

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