Variation in Vitamin C content of sprat larvae (Sprattus sprattus) in the Irish Sea

Hapette, A. M.; Coombs, S. H.; Williams, R.; Poulet, S. A.

doi:10.1007/bf01313469

Cited by 11 publications

(7 citation statements)

References 37 publications

(32 reference statements)

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Section: Discussionmentioning

confidence: 57%

“…However, although they share similar feeding preferences, it is possible that sprat growth is not limited by food availability to the same extent as dab larvae (<13 mm). Hapette et al (1991) found no significant differences in condition (vitamin C content per unit weight) of sprat larvae from stratified and mixed sites despite the presence of higher prey concentrations in the stratified waters. Furthermore, research conducted on sprat larvae in the German Bight of the North Sea recorded no significant differences in growth rates in stratified and mixed sites (Ré and Gonçalves, 1993) and found no relationship between sprat larval condition and available food using lipid and elemental analysis (Håkanson et al, 1994).…”

Section: Spatial Variability In Growth and Conditionmentioning

confidence: 57%

“…Although extensive research has been carried out to examine feeding conditions for fish larvae within the WIS, few studies have investigated directly the spatial and temporal variability of larval growth and condition in this region. Hapette et al (1991) examined the variation in nutritional condition (vitamin C content) of sprat (Sprattus sprattus) larvae along a transect in the Irish Sea. They found no significant differences in the vitamin C content per unit weight between larvae from stratified and mixed waters.…”

Section: Introductionmentioning

confidence: 99%

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Temporal and spatial variability in growth and condition of dab (Limanda limanda) and sprat (Sprattus sprattus) larvae in the Irish Sea

Lee

Danilowicz

Dickey‐Collas³

2006

Fisheries Oceanography

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Variability in the high mortality rate during early life stages is considered to be one of the principal determinants of year-class variability in fish stocks. The influence of water column stability on the spatial distribution of fish larvae and their prey is widely acknowledged. Water column stability may also impact growth through the early life history of fishes, and consequently alter the probability of survival to maturity by limiting susceptibility to predation and starvation. As a test of this concept, the variability in condition and growth of dab (Limanda limanda) and sprat (Sprattus sprattus) larvae was investigated in relation to seasonal stratification of the water column in the north-western Irish Sea. RNA/DNA ratios and otolith microincrement analysis were used to estimate nutritional status and recent growth rates of larvae captured on four cruises in May and June of 1998 and 1999. Dab and sprat larvae were less abundant in 1999 and were in poorer condition with lower growth rates than in 1998. Dab larvae of <13 mm also exhibited spatial variability with higher RNA/DNA ratios at the seasonal tidal-mixing front compared with stratified and mixed water masses. However, the growth and nutritional status of sprat larvae was uncorrelated to water column stability, meaning the more favourable feeding conditions generally associated with the stratified pool and tidal-mixing front in the Irish Sea were not reflected in the growth and condition of these larvae. This suggests that the link between stability, production and larval growth is more complicated than inferred by some previous studies. The existence of spatio-temporal heterogeneity in the growth and condition of these larvae has implications for larval survival and the recruitment success of these species in the Irish Sea.

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Section: Discussionmentioning

confidence: 57%

Section: Spatial Variability In Growth and Conditionmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

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Temporal and spatial variability in growth and condition of dab (Limanda limanda) and sprat (Sprattus sprattus) larvae in the Irish Sea

Lee

Danilowicz

Dickey‐Collas³

2006

Fisheries Oceanography

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“…After this period (start of exogenous feeding in Tables 2 to 4) their length is ca 9.0 mm (0.7 mg wet wt) for herring and 6.0 mm (0.5 mg wet wt) for sprat (Ojaveer 1981, Hudd 1982, Hapette et al 1991. At this age, the larvae start to feed, and they have lost 20 % in weight (von Gamble et al 1985).…”

Section: Methodsmentioning

confidence: 99%

Food consumption of larval, young and adult herring and sprat in the Baltic Sea

Arrhenius¹,

Hansson²

1993

Mar. Ecol. Prog. Ser.

156

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The total food consumption of herring Clupea harengus L. and sprat Sprattus sprattus (L.), the dominant zooplanktivorous fish in the Baltic Sea, was estimated from published data on abundances, growth, mortality rates and diets uslng a bioenergetics model. The annual food consumption was 5.0 X 107 tonnes for herring and 2.4 X 107 tonnes for sprat. For herring ca 90 % of the food consumed was zooplankton and the rest n~ysids and benthos. Larvae and young-of-the-year (YOY) of sprat and herring accounted for 50 and 45% of the total consumption respectively. Peak consumption rates occurred in August-September. Our estimate for annual consumption of zooplankton by clupeids in the Baltic sea is 4 times higher than previous estimates. One major explanation for this is that we included the consumption by YOY and 1 yr old fish. Our simulations also show that a diet shift, from a mix of zooplankton, mysids and amphipods to only zooplankton, could have a significant effect on fish growth rate. At a fixed biomass consumption, the lower energy density of zooplankton would mean that thls shift would decrease growth by about 25 % for older age groups. This decrease is similar to that observed in the Baltlc Sea in the late 1980s.

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“…High concentrations have been measured in gonads, eggs, and fry of different fish species (Dabrowski 1977;Sandnes and Braekkan 1981;Dabrowski 1991;Hapette et al 1991;Dabrowski and Blom 1994). Ascorbate deficiency causes an impaired hatching rate in rainbow trout (Oncorhynchus mykiss, formerly Salmo gairdneri) eggs (Sandnes et al 1984), and a high ascorbate requirement in embryonic development has been demonstrated by Sato et al (1987).…”

Section: Introductionmentioning

confidence: 99%

Ascorbic acid in the gonads of North Sea dab (Limanda limanda) during the reproductive cycle

Saborowski¹,

Koprivnjak²,

Sisak³

et al. 1997

Journal canadien des sciences halieutiques et aquatiques

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Total ascorbic acid was measured in the gonads of North Sea dab (Limanda limanda) throughout one reproductive cycle. In the ovaries, the concentration of ascorbate began to increase during the resting period in summer and reached maximum values of 400 µg⋅g fresh weight (fw) -1 at the onset of ovary maturation in fall. Concentrations declined rapidly towards the spawning period in spring and reached the lowest values of 80-100 µg⋅g fw -1 . The maximum deposition of ascorbate in the ovaries amounted to 2.5 mg⋅organ -1 and occurred in late winter, corresponding to the beginning of the spawning period. In the testes, ascorbate concentrations were lower than in the ovaries, reaching a maximum of 170 µg⋅g fw -1 in early fall. The lowest values of 20-60 µg⋅g fw -1 appeared in winter and spring. In the testes the highest deposition of ascorbate amounted to 110 µg⋅organ -1 and appeared at the beginning of maturation. The sexual differences and seasonal variations are discussed in relation to the reproductive biology of dab.Résumé : L'acide ascorbique total a été mesuré dans les gonades des poissons Limande (Limanda limanda) de la mer du nord durant un cycle reproductif complet. Dans les ovaires les concentrations de l'acide ascorbique total commencent à augmenter durant la période de repos (été), et atteignent des valeurs maximales de 400 µg⋅g poids frais (pf) -1 durant l'automne; c'est à dire au début de la croissance des ovaires. Au printemps, les concentrations ont chuté rapidement avant la période de fraye, et ont atteint des concentrations minimales de 80 à 100 µg⋅g pf -1 . Vers la fin de l'hiver, la déposition maximale de l′acide ascorbique était de 2.5 mg⋅organe -1, correspondant au début de la période de fraye. Au début de l′automne, dans les testicules, les concentrations de l'acide ascorbique total étaient moins que dans les ovaires atteignant une valeur maximale de 170 µg⋅g pf -1 . En hiver et au printemps, des concentrations minimales de 20 à 60 µg⋅g pf -1 ont été atteintes. Au début de la maturation, la déposition d′acide ascorbique dans les testicules était de 110 µg⋅organe -1 . La différence sexuelle et les cycles saisonièrs sont mis en relation avec la biologie de reproduction du limande.

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Variation in Vitamin C content of sprat larvae (Sprattus sprattus) in the Irish Sea

Abstract: Abstract. Sprat (Sprattus sprattus) eggs and larvae were sampled from plankton and the Irish

Cited by 11 publications

References 37 publications

Temporal and spatial variability in growth and condition of dab (Limanda limanda) and sprat (Sprattus sprattus) larvae in the Irish Sea

Temporal and spatial variability in growth and condition of dab (Limanda limanda) and sprat (Sprattus sprattus) larvae in the Irish Sea

Food consumption of larval, young and adult herring and sprat in the Baltic Sea

Ascorbic acid in the gonads of North Sea dab (Limanda limanda) during the reproductive cycle

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