Seasonal and interannual variations in size, biomass and chemical composition of the eggs of North Sea shrimp, Crangon crangon (Decapoda: Caridea)

Urzúa, Ángel; Paschke, Kurt; Gebauer, Paulina; Anger, Klaus

doi:10.1007/s00227-011-1837-x

Cited by 61 publications

(46 citation statements)

References 78 publications

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“…The methodology used in this study is described only briefly, as it is largely the same as explained in details in a recent paper dealing exclusively with the embryonic phase of C. crangon (Urzúa et al 2012). …”

Section: Methodsmentioning

confidence: 99%

“…Total length (TL), dry weight (W), elemental composition (CHN) and proximate biochemical composition (total protein and lipid) of newly hatched larvae Newly hatched larvae were taken in regular intervals (approximately monthly) for parallel determinations of total length (TL), dry weight (W), elemental composition (contents of carbon, hydrogen and nitrogen; collectively CHN) and proximate biochemical composition (total protein and lipid), which were measured with standard techniques (for recent description of details, see Urzúa and Anger 2011;Urzúa et al 2012). The energy content was estimated from biochemical data (Winberg 1971), because conversions from CHN data (Salonen et al 1976) tend to underestimate the energy content more strongly than conversions from biochemical composition (Anger 2001;Urzúa et al 2012).…”

Section: Sampling and Maintenance Of Ovigerous Femalesmentioning

confidence: 99%

“…During this extended period, this species shows significant seasonal variations in size and biomass of newly laid eggs (Boddeke 1982;Urzúa et al 2012). However, the question remains, whether seasonal variations in egg biomass directly translate to variations in larval quality at hatching, as suggested by studies of larval tolerance of food limitation (Paschke et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…However, the question remains, whether seasonal variations in egg biomass directly translate to variations in larval quality at hatching, as suggested by studies of larval tolerance of food limitation (Paschke et al 2004). We therefore explored relationships between previously published data of biomass and chemical composition of eggs (Urzúa et al 2012), water temperature during embryogenesis (Wiltshire et al 2010) and larval biomass at hatching, which may indicate ''latent'' or ''carry-over effects'' between successive early life-history phases (Harrison et al 2011). …”

Section: Introductionmentioning

confidence: 99%

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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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Section: Methodsmentioning

confidence: 99%

Section: Sampling and Maintenance Of Ovigerous Femalesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…For each sample, parallel determinations of dry weight (W) and contents of carbon (C), nitrogen (N), total lipid, and protein were carried out with standard techniques (Urzúa & Anger, 2011;Urzúa et al, 2012), considering these constituents as proxies of organic matter. Moreover, carapace length (CL) was microscopically measured in first-stage juveniles, indicating the increment in body size achieved during the period of total larval development.…”

Section: Larval Rearingmentioning

confidence: 99%

Growth, elemental and proximate biochemical composition of larval Amazon River prawn, Macrobrachium amazonicum, reared under different salinity conditions

Hayd

Anger

Urzúa

2017

lajar

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ABSTRACT. In the aquaculture of prawns in inland facilities, the supply with natural seawater is technically difficult and expensive, while the use of artificial salt may be suboptimal due to unfavorable ionic composition. In the present study, Amazon River prawn, Macrobrachium amazonicum, were reared from hatching through nine larval stages to the first juvenile instar, comparing four experimental conditions with two salinities (5, 10) and two different types of salt (artificial, natural). Larval biomass growth was measured in terms of changes in dry weight (W), contents of carbon and nitrogen (C, N), and proximate biochemical composition (lipid, protein); moreover, body size (carapace length, CL) was measured in first-stage juveniles. After passing through the nonfeeding first larval stage, later stages showed an exponential increase in values of biomass per individual. Rates of increase differed significantly among treatments, showing generally lower growth in experiments with artificial vs. natural salt, and at 5 vs. 10. The same response pattern was found also in CL of early juvenile shrimps. Similar but mostly weaker effects were observed in the percentage C, N, lipid, and protein values (in % of W), and in the C: N mass ratio. Our data indicate that larval rearing of M. amazonicum is feasible with artificial salts and at lower than commonly used standard salinity (10). This makes the cultivation of this species feasible also in aquaculture facilities located at large distance from the coast, where a reduction of costs and logistic investments may compensate for reduced larval growth and production of smaller juveniles. However, these salinity effects on offspring production have to be taken into account in comparisons of growth data from different laboratories and locations.

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Differential physiological responses to oxygen availability in early life stages of decapods developing in distinct environments

et al. 2015

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Seasonal and interannual variations in size, biomass and chemical composition of the eggs of North Sea shrimp, Crangon crangon (Decapoda: Caridea)

Cited by 61 publications

References 78 publications

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

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

Growth, elemental and proximate biochemical composition of larval Amazon River prawn, Macrobrachium amazonicum, reared under different salinity conditions

Differential physiological responses to oxygen availability in early life stages of decapods developing in distinct environments

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