Egg quality criteria in common dentex (Dentex dentex )

University of Salzburg, Salzburg, Salzburg, Austria
Aquaculture (Impact Factor: 1.88). 09/2006; 260:232-243. DOI: 10.1016/j.aquaculture.2006.06.028
Source: OAI

ABSTRACT The spawning quality, in terms of hatching rate, larval mortality at 3 and 5 days post-hatching (dph) and day of total mortality of two
broodstock groups of common dentex was evaluated for 1 month in 2005. Several biochemical parameters including total lipid content,
lipid class and fatty acid composition, carbohydrate content and metabolic enzyme activities were analysed in all the egg batches
collected. Comparison was carried out between low- (mortality at 3 dph higher than 35%) and high-quality (mortality at 3 dph lower than
10%) batches. No differences were observed in lipid content and/or lipid class and fatty acid composition although a slightly higher
content of neutral lipids was detected in high-quality batches. However, significant differences were obtained regarding carbohydrate
composition and the activity of enzymes such as alkaline phosphatase and pyruvate kinase being higher in low-quality egg batches.

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Available from: Alicia Estevez, Sep 26, 2015
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    • "mean ± SD = 0.288 ± 0.087; C.V. = 30.20%; Giménez et al., 2006), FAAs (r 2 = 0.605-0.875; mean ± SD = 0.700 ± 0.062; C.V. = 8.85%; Samaee et al., 2010), and non-Vtg-derived proteins (Samaee et al., unpublished data). "
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    ABSTRACT: This study represents the initial attempt to evaluate the effect of egg protein-bound amino acid (i.e., vitellogenin-derived PAAs) content on embryo/larva success in Dentex dentex. Viable eggs were obtained from a single female (i.e., intra-individual analysis) in captivity. Selected embryo/larva viability parameters (the egg floating rate, the hatching rate, and the larval survival rate at days 0 to 5 post-hatch) were determined. The egg batches were categorised in three groups (high-, medium-, and low-quality batches) based on the magnitude of their hatching rates. The protein-bound amino acid content of biometrically similar egg batches of varying quality was analysed. The content values for 12 proteinbound amino acids (i.e., essential PAAs: Thr, Met, Arg, Ile, Val, Phe, His; non-essential PAAs: Ala, Glu, Gly, Asp, and Ser) were significantly correlated with the embryo/larva viability parameters in an analysis performed in terms of their ratios. The egg protein-bound amino acid content was significantly correlated with the dentex larval survival rate at 3 and 5 days post-hatch, a critical period of survival that is problematic during the propagation of this species in captivity. The results of this study also offer statistical evidence for the effects of the interrelationships of the egg protein-bound amino acids on the relationships between the quantitative composition of the protein-bound amino acids and the viability parameters.
    Animal Biology 01/2013; 63(1):59-75. DOI:10.1163/15707563-00002394 · 0.60 Impact Factor
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    • "Anahtar Kelimeler: Dentex dentex, yumurta kalitesi, morfometri, embriyolojik gelişim. batch varies over the spawning season as well as the quality between egg batches (Gimenez et al., 2006). One of the main problems of common dentex is very carnivorous and cannibalistic species under intensive culture condition (Efthimiou et al., 1994). "
    • "batch varies over the spawning season as well as the quality between egg batches (Gimenez et al., 2006). One of the main problems of common dentex is that it is very carnivorous and cannibalistic species under intensive culture condition (Efthimiou et al., 1994). "
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    ABSTRACT: In this study, egg quality determination of common dentex (Dentex dentex) was investigated by using egg, yolk and oil globule diameter, from the first division to the hatching during natural and photoperiodic manipulation of spawning time. In the viable, floating eggs, the minimal and maximal diameter of the egg, yolk and oil globule were measured. Based on these measurements several parameters were calculated describing the shape of the egg, yolk and oil globule and the size relationship between these compartments. Hatching rate was calculated as 92% in natural spawning time (NST) and 61% photoperiodic manipulation of spawning time (PMST). Also, average egg diameter was measured as 0.949±0.038 mm in NST and 0.911±0.014 mm in PMST. In NST, egg diameter and yolk diameter of the eggs were significantly bigger than eggs in PMST (P<0.05). The morphometric parameters of oil globule could be accepted as an indicator for description of quality criteria of eggs.
    Turkish Journal of Fisheries and Aquatic Sciences 02/2011; 11(3). DOI:10.4194/1303-2712-v11_3_13 · 0.38 Impact Factor
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