Organogenesis and histological development of the wedge sole <Emphasis Type="Italic">Dicologoglossa cuneata</Emphasis> M. larva with special reference to the digestive system |
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Authors: | Marcelino Herrera Ismael Hachero-Cruzado Alicia Naranjo Juan Miguel Mancera |
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Institution: | 1.IFAPA Centro “Agua del Pino”,Cartaya,Spain;2.Departamento de Biología, Facultad de Ciencias del Mar y Ambientales,Universidad de Cádiz,Puerto Real,Spain |
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Abstract: | In this work, several features during the wedge sole larval development have been described. The newly hatched larva presented
an acidophilic yolk with some oil drops. The digestive tract began to differentiate at 1 DAH, with a loop being discernible.
The pancreas and liver were completely formed at 2 DAH, the former showing its typical basophilic acinar structure and acidophilic
zymogen granules. The first supranuclear vesicles in enterocytes were seen at 3 DAH. At 4 DAH, yolk reserves were completely
exhausted, the number of oesophagus and intestine mucous cells increased, and the heart was differentiated into four chambers:
the venous sinus, atrium, ventricle, and arterious bulb. The development was fast and almost all organs were differentiated
at 2 DAH. It is important to emphasize that gastric glands were not detected, a factor that should be considered when deciding
diet formulation and feeding strategies for the rearing of this species. |
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Keywords: | |
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