Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)

Detalles Bibliográficos
Autores principales:	Fraysse, Cintia, Malanga, Gabriela, Pérez, Analía F.
Formato:	Online
Idioma:	eng
Publicado:	Universidad de Costa Rica 2017
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/rbt/article/view/31689

id	RBT31689
record_format	ojs
spelling	RBT316892022-06-09T18:10:56Z Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea) Fraysse, Cintia Malanga, Gabriela Pérez, Analía F. Echinoculture β-carotene gonad histology gonad improvement Beagle Channel. The organoleptic characteristics of sea urchins gonads (size and color, among others) can be improved by artificial diets. Loxechinus albus is considered one of the most economically significant resources from the littoral-benthic systems in the South Pacific Ocean from Peru to Chile. The objective was to determine artificial diets effects on the organoleptic traits of gonads, reproductive condition, body growth and survival of Loxechinus albus. Two types of diets were administrated (low carotene content diet (LC): balanced food with 0.02% β-carotene and high carotene content diet (HC): balanced food with 0.045% β-carotene) for 16 weeks. As a measurement of growth rate, test diameter of sea urchins fed with artificial diets was measured at the beginning and at the end of the experiment. At both times, size (GI) and color (CI) of the gonads were recorded in ten individuals from each treatment and ten from the natural population (NP). Energy density (ED), energy content (EC) and total carotenes (TCC) were determined by calorimetry and spectrophotometry, respectively. Histological sections were examined microscopically and the sex was identified. Each female was assigned to a gametogenic stage (reproductive condition) and determined: number and diameter of the oocytes, gonadal area occupied by oocytes, and relative frequencies of reproductive stages. At the end of the experiment in relation to the NP, it was possible to achieve higher GI values for both artificial diets. The NP showed higher gonadal area occupied by oocytes and larger oocyte diameter at 16 weeks (P<0.01). In addition, individuals fed with both artificial diets, presented “growth” and “advanced growth” gonad stages (both times), while the NP individuals, presented stages of “prematurity”, “maturity” and “partial spawning” at week 16. The data shows the highest CI value for the HC diet at eight weeks (P<0.01). Moreover, TCC values for the NP were significantly higher at week 16 (P<0.01). Loxechinus albus is an appropriate species to be kept in captivity, as their mortality is very low, facilitating the achievement of long-term experiences of gonadal improvement. According to our data the optimal time to improve the organoleptic characteristics is eight weeks with a high carotene artificial diet, since optimal gonad coloration was reached, and GI values did not differ significantly from the ones achieved at the end of the experiment for both diets, or the ones shown in the NP. This is translated into a lower cost by a reduced cultivation time. Rev. Biol. Trop. 65(Suppl. 1): S207-S220. Epub 2017 November 01. Universidad de Costa Rica 2017-11-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf text/html https://revistas.ucr.ac.cr/index.php/rbt/article/view/31689 10.15517/rbt.v65i1-1.31689 Revista de Biología Tropical; Vol. 65 No. S1 (2017): Volume 65 – Supplement 1 – November 2017: Research on Echinoderms in Latin America IV; S207–S220 Revista de Biología Tropical; Vol. 65 Núm. S1 (2017): Volumen 65 – Suplemento 1 – Noviembre 2017: Estudios Latinoamericanos en Equinodermos IV; S207–S220 Revista Biología Tropical; Vol. 65 N.º S1 (2017): Volume 65 – Supplement 1 – November 2017: Research on Echinoderms in Latin America IV; S207–S220 2215-2075 0034-7744 10.15517/rbt.v65i1-1 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/31689/31335 https://revistas.ucr.ac.cr/index.php/rbt/article/view/31689/31366 Copyright (c) 2017 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
institution	Universidad de Costa Rica
collection	Revista de Biología Tropical
language	eng
format	Online
author	Fraysse, Cintia Malanga, Gabriela Pérez, Analía F.
spellingShingle	Fraysse, Cintia Malanga, Gabriela Pérez, Analía F. Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)
author_facet	Fraysse, Cintia Malanga, Gabriela Pérez, Analía F.
author_sort	Fraysse, Cintia
title	Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)
title_short	Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)
title_full	Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)
title_fullStr	Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)
title_full_unstemmed	Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)
title_sort	effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of loxechinus albus (echinodermata: echinoidea)
publisher	Universidad de Costa Rica
publishDate	2017
url	https://revistas.ucr.ac.cr/index.php/rbt/article/view/31689
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Effects of artificial diets with different carotene content on the organoleptic characteristics of the gonads and reproductive condition of Loxechinus albus (Echinodermata: Echinoidea)

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