Yolk Absorption Rate and Mouth Development in Larvae of Dormitator latifrons (Perciformes: Eleotridae)
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Autor/a
Reyes-Mero, Byron Manuel
Santana-Piñeros, Ana María
Muñoz-Chumo, Leonela Griselda
Cruz-Quintana, Yanis
Fecha de publicación
2022-12-07ISSN
2410-3888
Resumen
Fish larvae suffer high starvation mortality during the transition from yolk absorption to exogenous feeding, and the size of the developing buccal structures limits the food they can consume. Determining the suitable timing and size of live or inert foods could decrease this mortality. We described mouth development and determined the yolk absorption rate and point-of-no-return (PNR) of Dormitator latifrons larvae. One male and one female specimen were induced to spawn using salmon GnRHa implants, and 45 of their larvae were sedated and observed under a microscope every 24 h to measure total length, standard length, yolk sac length, yolk sac width, oil globule length, oil globule width, width of the oesophagus, and length of the upper and lower jaw longitudinal. The growth model, maximum mouth opening, daily survival, and starvation period were determined. The larval growth was fastest during the first 24 h post−hatching (HPH) at 28 ± 1 °C with an average increase of 625.42 µm in total length and 573.51 µm in standard length. The highest percentage of yolk absorption (52%) occurred within 24 HPH and at 96 HPH the yolk sac was completely reabsorbed. The PNR was reached at 156.41 HPH (p < 0.05). At 96 HPH, the upper and lower jaw were distinguishable by mouth movements. Our results suggest that the larvae of D. latifrons should be fed at 96 HPH with prey measuring 50–65 µm.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
637 - Productos de los animales domésticos, de la caza y de la pesca
Páginas
9
Publicado por
MDPI
Publicado en
Fishes
Citación
Reyes-Mero, Byron Manuel, Ana María Santana-Piñeros, Leonela Griselda Muñoz-Chumo, Yanis Cruz-Quintana, and Enric Gisbert. 2022. "Yolk Absorption Rate And Mouth Development In Larvae Of Dormitator Latifrons (Perciformes: Eleotridae)". Fishes 7 (6): 375. doi:10.3390/fishes7060375.
Número del acuerdo de la subvención
MICIU/Programa Estatal de I+D+I orientada a los retos de la sociedad/117RT0521/ES/Estrategias de desarrollo y mejora de la producción de larvas de peces en Iberoamerica/LARVAplus
Program
Aqüicultura
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