Embryonic Development, Larval Rearing, and Digestive Tract and Enzyme Ontogeny of Hilsa Shad, Tenualosa ilisha

A good understanding of a given species' embryology is important to settle the larval rearing bases when juveniles are required for culture purposes or conservation programs. Changes in embryonic morphology, protein concentration, and protein type occurring in prawn eggs were analyzed in the present work. Berried females of Macrobrachium tenellum were collected in the Colotepec River, Oaxaca, Mexico. The eggs were taken from the ovigerous mass and embryonic stages classified by their color. Morphological changes in the embryos allowed identifying six embryonic stages based on color, egg size, and morphological features. Determinations of the protein extract were executed in SDS-PAGE (electrophoresis in polyacrylamide gels) and, subsequently, proteomic analyses were also performed. Protein bands along embryonic development and their molecular weights are presented and commented.

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Ontogeny of the digestive tract in shi drum (Umbrina cirrosa L.) reared using the mesocosm larval rearing system

Aquaculture ◽

10.1016/j.aquaculture.2006.06.001 ◽

2006 ◽

Vol 260 (1-4) ◽

pp. 357-368 ◽

Cited By ~ 33

Author(s):

Mario M. Zaiss ◽

Ioannis E. Papadakis ◽

Eric Maingot ◽

Pascal Divanach ◽

Constantinos C. Mylonas

Keyword(s):

Digestive Tract ◽

Larval Rearing

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Embryology and early ontogeny of an anemonefish Amphiprion ocellaris

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315407054227 ◽

2007 ◽

Vol 87 (4) ◽

pp. 1025-1033 ◽

Cited By ~ 13

Author(s):

Inayah Yasir ◽

Jian G. Qin

Keyword(s):

Coral Reef ◽

Embryonic Development ◽

Digestive Tract ◽

Coral Reef Fish ◽

Ventral Surface ◽

Early Ontogeny ◽

Egg Activation ◽

Pectoral Fins ◽

Vegetal Pole ◽

Blood Formation

The present study describes the embryonic development and early ontogeny of Amphiprion ocellaris from fertilization to post hatching. Anemonefish spontaneously spawned at 27–28°C. The newly laid eggs were orange in colour and elliptical in shape (1.8×0.8 mm). Melanin appeared as a black mass situated at the vegetal pole in mature eggs. This is rarely seen in eggs of other fish species. We documented developmental times at 27–28°C to egg activation (0.5 h), cleavage (4 h), blastula (11.5 h), gastrula (20 h), neurula (24.5 h), somite (28.5 h), turnover (72 h), blood formation (113 h) and internal ear and jaw formation (144 h). Hatching occurred 152 h after fertilization. On day 4, the eye buds were pigmented and melanophores formed on the ventral surface of the embryo. Internal ear and gill formation were completed on day 5 and coincided with movement of the opercula and pectoral fins. The mouth formed on day 6 and the digestive tract appeared on day 7. By day 10, the yolk was fully absorbed and a substantial amount of food was observed in the gut. Dark and orange pigments were dispersed and aggregated through muscle contractions by day 14, but red pigments did not appear until the fish were three months old. This study contributes to a further understanding of the embryology and the early ontogeny of damselfish and may help improve the culture of coral reef fish.

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Induction of Spontaneous Captive Spawning, Embryonic Development and Larval Rearing in Mystus cavasius

International Journal of Current Microbiology and Applied Sciences ◽

10.20546/ijcmas.2018.704.074 ◽

2018 ◽

Vol 7 (04) ◽

pp. 652-658

Author(s):

Rekha Das ◽

Himanshu Priyadarshi ◽

Satya Prakash ◽

Chandan Debnath ◽

Lopamudra Sahoo ◽

...

Keyword(s):

Embryonic Development ◽

Larval Rearing

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Histomorphological study of the gut developmental pattern in early life history stages of featherback, Chitala chitala (Hamilton)

Archives of Polish Fisheries ◽

10.1515/aopf-2015-0003 ◽

2015 ◽

Vol 23 (1) ◽

pp. 25-35 ◽

Cited By ~ 3

Author(s):

Anisa Mitra ◽

Pratap Kumar Mukhopadhyay ◽

Sumit Homechaudhuri

Keyword(s):

Digestive Tract ◽

Early Life History ◽

Larval Rearing ◽

Straight Tube ◽

Gastric Glands ◽

Life History Stages ◽

Freshwater Aquaculture ◽

Chitala Chitala ◽

Candidate Species ◽

Rearing Techniques

Abstract The present study was conducted to observe morphological and histological changes in the developing digestive system during the ontogeny of featherback, Chitala chitala (Hamilton), from hatching to 30 days post hatch (dph). Three significant stages were identified during digestive tract development in featherback: (1) endotrophic (0-8 dph), (2) endoexotrophic (8-12 dph), and (3) exotrophic (12-30 dph). At hatching, the mouth was closed and the digestive tract was a straight tube. At 8 dph, the mouth was opened and the appearance of the esophagus was observed. Between 6-8 dph, the primordial liver and exocrine pancreas were observed. Intestinal enterocyte activity was observed before stomach development. The esophageal goblet cells, teeth, and taste buds developed 2 days after the opening of the mouth, at the time of exogenous feeding. The development of the stomach, gastric glands, and pyloric caeca took place between the 7 and 12 dph. Except the increase in size and complexity of the structures, no noticeable changes were observed after 12 dphin C. chitala during the experiment. Our findings in the current work provide valuable information which might be useful for improving current larval rearing techniques of this promising new candidate species for freshwater aquaculture diversification.

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