Changes in metabolic substrates during early development in anchoveta Engraulis ringens (Jenyns 1842) in the Humboldt Current

We assessed the ontogenetic changes in protein content and free amino acids (FAA) in eggs and early larvae of Engraulis ringens (anchoveta) off central Chile on different dates during the spawning season. On all sampling dates, a reduction in embryonic yolk-sac volume, proteins and FAA concentration...

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Bibliographic Details
Published in:Marine biology 2010-05, Vol.157 (5), p.1137-1149
Main Authors: Krautz, M. C, Vásquez, S, Castro, L. R, González, M, Llanos-Rivera, A, Pantoja, S
Format: Article
Language:English
Subjects:
Agnatha. Pisces
Amino acids
Anchovies
Animal and plant ecology
Animal, plant and microbial ecology
Aquaculture
Biological and medical sciences
Biological research
Biology, Experimental
Biomedical and Life Sciences
Chemical properties
Eggs
Engraulis ringens
Fish
Fishes
Freshwater & Marine Ecology
Fundamental and applied biological sciences. Psychology
Genetic aspects
Hatching
Larvae
Larval development
Life Sciences
Lipids
Marine
Marine & Freshwater Sciences
Marine biology
Microbiology
Oceanography
Offspring
Original Paper
Proteins
Sea water ecosystems
Spawning
Synecology
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
Zoology
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Summary:We assessed the ontogenetic changes in protein content and free amino acids (FAA) in eggs and early larvae of Engraulis ringens (anchoveta) off central Chile on different dates during the spawning season. On all sampling dates, a reduction in embryonic yolk-sac volume, proteins and FAA concentrations occurred during development. Protein electrophoresis (SDS-PAGE) of eggs and larvae showed at least 22 protein bands: 11 were consumed early and not detected after hatching. The proportion of essential FAA (EFAA) was higher than the proportion of non-essential FAA (NEFAA) in early eggs and in 7 day-old larvae (82.5-73% EFAA respectively). During egg development, the FAA pool was dominated by leucine, alanine and lysine, three amino acids contributing 35-44% of the total FAA in eggs. During larval development, histidine was the most abundant FAA. In July, total FAA constituted 13-18% of the egg dry weight. A similar proportion (45-51%) occurred in July between protein plus FAA and total lipids. The differences in egg size during the spawning season along with variability in batch composition suggests that the female spawning condition is a major factor determining egg quality and early offspring success.
ISSN:0025-3162
1432-1793
DOI:10.1007/s00227-010-1395-7