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Αρχική    Effect of peptide diets on fish skeletal development  

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Κωδικός Πόρου 000461067
Τίτλος Effect of peptide diets on fish skeletal development
Άλλος τίτλος Μελέτη της επίδρασης της διατροφής με ενσωμάτωση ολιογοπεπτιδίων στη σκελετική ανάπτυξη των ιχθύων
Συγγραφέας Πρίντζη, Αλίκη Σ
Σύμβουλος διατριβής Κουμουνδούρος, Γεώργιος
Μέλος κριτικής επιτροπής Mazurais, David
Zambonino-Infante, Jose-Luis
Καρακάσης, Ιωάννης
Λύκα, Κωνσταντία
Σπηλιανάκης, Χαράλαμπος
Panserat, Stephane
Περίληψη The increasing demands of large-scale aquaculture production across the world tend to prioritize quantity over the welfare conditions of the reared animals and the quality of the final products. Body shape is among the critical parameters of fish quality, especially concerning the species which are marketed as a whole (Fragkoulis et al., 2017a). Beyond the dependence on genotype and environment, body shape is susceptible to increased variability induced by the appearance of skeletal deformities. Therefore, optimizing fish skeletal quality is an emerging issue, especially for aquaculture species (Boglione and Costa, 2011). This emergence is mainly correlated with the increased prevalence of skeletal abnormalities affecting not only farmed fish species but also the laboratory raised (Boglione et al., 2013b; Dietrich et al., 2021; Printzi et al., 2021b). Concerning the Mediterranean hatcheries, the mean abnormalities frequency is reported between 7-20% of the annual production with the possibility of reaching even higher levels under certain conditions (Georgakopoulou et al., 2010; Koumoundouros, 2010). In the case of gill-cover deformities for example, they have been reported to affect up to 80% of the farmed gilthead seabream (Sparus aurata) (Andrades et al., 1996; Verhaegen et al., 2007). Skeletal abnormalities development has been correlated with downgraded biological performance of the individuals (e.g., growth, survival, swimming performance, feed conversion ratio, susceptibility to stress and diseases; Basaran et al., 2007; Kent et al., 2004; Koumoundouros et al., 2002; Lijalad and Powell, 2009; Matsuoka, 2003; Schwebel et al., 2018), which therefore can negatively affect the production cost and market value (Gavaia et al., 2002; Koumoundouros, 2010). As a result, nowadays, skeletal deformities represent a valuable index of animal welfare (Huntingford et al., 2006). By successfully copying with skeletal abnormalities development, the aquaculture sector could not only optimize the product quality but simultaneously comply with the European legislation about animal-friendly husbandry practices (fish farming with respect to the biological characteristics and different species-specific needs; Giménez-Candela et al., 2020). Thus, a better understanding of the development of skeletal deformities in fish is of increasing necessity. Extensive research over the last decades has identified several causative factors acting upon specific developmental windows for the induction of skeletal deformities (Boglione et al., 2013b). Beyond the extended awareness of the aquaculture sector today, the latter continue to appear even in well-studied species (e.g., seabass, Dicentrarchus labrax and seabream), as a result of inappropriate rearing procedures (Loizides et al., 2014b). To copy with their unpredictable development, new tools are available today (e.g., morphometrics for skeletal deformities prediction, Fragkoulis and Koumoundouros, 2021; key-performanceindicators for identification of skeletal quality predictors, Kourkouta et al., 2022) targeting the early identification of the skeletal deformities and therefore a cost-efficient management of the hatchery production. Moreover, utilizing recent knowledge over skeletal abnormalities induction in a standardized way (e.g., swimming challenge test for haemal lordosis induction; Kihara et al., 2002; Printzi et al., 2021a), can emerge as a valuable method of rearing parameters evaluation. Through this controlled introduction of a specific deformity under standard conditions, it is possible to evaluate the effect of nutritional and/or abiotic stimuli on the skeletal development and integrity of the individuals by a simple comparison. Consequently, the examination of the nutritional and/or abiotic effects on fish skeletal development and integrity is now possible even after the end of the larval stage. Thus, reversing the role of deformities from results to accurate tools allows current research to move towards their prevention or recovery. Within this frame, an early evaluation of the possible nutrient effects on larval and post-larval skeletal elements could be achieved, enabling the development of appropriate diets for optimal skeletal development. The following sections introduce the skeletal abnormalities in fish, with a description of the main typologies observed, their causative factors and their recovery potential. Increased attention is then drawn into the tools of skeletal abnormalities induction that are available today, with emphasis on the swimming challenge tests (SCT) for evaluating the vertebral columns’ integrity in post-larval individuals. A detailed insight into the main teleosts skeletal tissues and their plasticity is provided afterwards. Finally, the last sections are dedicated to early fish nutrition, revealing the main challenges that larval finfish production faces today. Soon after establishing the basic key-points in early larval digestive function, the nutritional effects on teleost musculoskeletal development are also discussed according to the nutrient group (lipids, proteins, vitamins, minerals).
Φυσική περιγραφή 194 σ. : πίν., σχήμ., εικ. ; 30 εκ.
Γλώσσα Αγγλικά
Θέμα Early developmental stages
Skeletal deformities
Πρώιμα οντογενετικά στάδια
Σκελετικές παραμορφώσεις
Ημερομηνία έκδοσης 2023-12-20
Συλλογή   Σχολή/Τμήμα--Σχολή Θετικών και Τεχνολογικών Επιστημών--Τμήμα Βιολογίας--Διδακτορικές διατριβές
  Τύπος Εργασίας--Διδακτορικές διατριβές
Εμφανίσεις 6

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