Structural development of Pacific red snapper Lutjanus peru from hatching to the onset of first feeding

Successful rearing of larval fish requires culture conditions and feeding strategies matching the ontogenetic status of larvae. This study describes the external morphology and development of organs and structures involved in the feeding process (i.e. sensorial organs, mouthparts and digestive syste...

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Veröffentlicht in:Aquaculture research 2015-05, Vol.46 (5), p.1162-1174
Hauptverfasser: Zavala-Leal, Iram, Dumas, Silvie, López-Villegas, Edgar O., Peña, Renato, Contreras-Olguín, Mauricio, Flores-Montijo, Laura, De La Cruz-Agüero, José
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container_end_page 1174
container_issue 5
container_start_page 1162
container_title Aquaculture research
container_volume 46
creator Zavala-Leal, Iram
Dumas, Silvie
López-Villegas, Edgar O.
Peña, Renato
Contreras-Olguín, Mauricio
Flores-Montijo, Laura
De La Cruz-Agüero, José
description Successful rearing of larval fish requires culture conditions and feeding strategies matching the ontogenetic status of larvae. This study describes the external morphology and development of organs and structures involved in the feeding process (i.e. sensorial organs, mouthparts and digestive system) from hatching until first feeding in Pacific red snapper. Hatching occurred 26 h after fertilization at 26°C and total length (TL) was 2.45 ± 0.08 mm. The larvae showed an undifferentiated eye and digestive tract. At 48 hah, TL was 3.31 ± 0.12 mm. Yolk and oil globule were still present. The mouth was still closed, but the Meckel's, quadrate, hyoid and hyomandibular cartilages were present. The retina was formed by 5 layers, and a thin layer of pigment epithelium was observed in the outer nuclear layer (ONL). At 70 hah, TL was 3.44 ± 0.22 mm. A remnant of oil globule was still present. The mouth and anus were open. At 93 hah, the number of cones in the ONL of the retina have increased and there was more pigment in the pigment epithelial layer. A joint between Meckel's and the quadrate cartilage and also a joint between the hyomandibular cartilage and the skull were present. The presence of live feed was detected in the digestive tract of these larvae. Based on these observations, the Pacific red snapper larvae is functional to start ingesting live feed between the 3rd and 4th day after hatching.
doi_str_mv 10.1111/are.12272
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A joint between Meckel's and the quadrate cartilage and also a joint between the hyomandibular cartilage and the skull were present. The presence of live feed was detected in the digestive tract of these larvae. 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A joint between Meckel's and the quadrate cartilage and also a joint between the hyomandibular cartilage and the skull were present. The presence of live feed was detected in the digestive tract of these larvae. 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subjects early development
first feeding
Lutjanus peru
Pacific red snapper
title Structural development of Pacific red snapper Lutjanus peru from hatching to the onset of first feeding
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