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Krieger, Jens; Fleig, Richard

doi:10.1023/a:1007843306186

Cited by 13 publications

(1 citation statement)

References 38 publications

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“…Yolk resorption during the first life stages occurs through the yolk syncytial layer (Krieger & Fleig, 1999), as observed in this study. The time for mouth opening is variable among species (Santos & Godinho, 1996 occurring at 5-6 days post-hatching for the erythrinid species studied, when the stomach was completely formed indicating transition to exogenous feeding.…”

Section: Embryogenesis and Early Larval Developmentsupporting

confidence: 72%

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

Gomes

Scarpelli

Arantes

et al. 2007

Journal of Fish Biology

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Oocyte morphology, embryogenesis and early larval development were compared in Hoplerythrinus unitaeniatus, Hoplias lacerdae and Hoplias malabaricus (Characiformes: Erythrinidae) by macroscopical, histological, histochemical and ultrastructural analyses. The eggs of the three species were yellowish and adhesive, containing carboxyl and sulphate radicals in the glycoconjugates of the zona radiata. A complex surface arrangement was identified in oocytes of H. unitaeniatus and H. lacerdae, while H. malabaricus had a simple oocyte surface pattern. Lectin histochemistry revealed different carbohydrate terminal residues in cortical alveoli, outer zona radiata and follicular cells of the three species. At the animal pole, the oocyte surface topography surrounding the micropyle was species-specific. The micropylar cell was ConApositive, suggesting the presence of carbohydrates with mannose/glucose terminal residues that could have a role during fertilization. The erythrinids exhibited a prolonged embryonic and larval development compared to other Characiformes, a reproductive strategy used for increasing offspring protection. Early development proceeded most rapidly in H. unitaeniatus, followed by H. malabaricus and then H. lacerdae, which could have more developed parental care behaviour. An adhesive organ composed of secretory prismatic cells protruding from the cephalic region of the three erythrinid larva allowed them to attach to one another during development. Reproductive behaviour and early developmental strategies were similar in the three species, but the oocyte surface morphology suggests a close relationship between H. unitaeniatus and H. lacerdae.

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Section: Embryogenesis and Early Larval Developmentsupporting

confidence: 72%

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

Gomes

Scarpelli

Arantes

et al. 2007

Journal of Fish Biology

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Utilization of Yolk: Transition from Endogenous to Exogenous Nutrition in Fish

Jaroszewska

Dąbrowski

2011

Larval Fish Nutrition

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The Nature of Exocytosis in the Yolk Trophoblastic Layer of Silver Arowana (Osteoglossum bicirrhosum) Juvenile, the Representative of Ancient Teleost Fishes

Jaroszewska

Dąbrowski

2009

The Anatomical Record

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We have chosen the silver arowana (Osteoglossum bicirrhosum), a representative of the most ancient teleost family Osteoglossidae, to address the question of yolk nutrients utilization. Silver arowana have particularly large eggs (1-1.5 cm of diameter) and a unique morphology of the yolk. We present evidence that the yolk cytoplasmic zone (ycz) in the ''yolksac juveniles'' is a very complex structure involved in sequential processes of yolk hydrolysis, lipoprotein particles synthesis, their transport, and exocytosis. Vacuoles filled with yolk granules in different stages of digestion move from the vitellolysis zone through the ycz to be emptied into the microvillar interspace in the process of exocytosis. The area of the ycz with the abundance of the mitochondria must play an important role in providing energy for both the transport of vacuoles and the release of their contents. Therefore, we postulate that the function of yolk syncytial layer (ysl) as the ''early embryonic patterning center'' transforms in fish larvae or yolksac juveniles into a predominantly specialized role as the yolk trophoblastic layer (ytl) involved in yolk nutrients utilization. In addition to discovering the mechanism of transformation of the ysl function into ytl function, we suggest that the machinery involved in nutrient mobilization and exocytosis in yolk of arowana yolksac juveniles can be very attractive system for studies of regulatory processes in almost all secretory pathways in animal cells.

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Cited by 13 publications

References 38 publications

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

Comparative oocyte morphology and early development in three species of trahiras from the São Francisco River basin, Brazil

Utilization of Yolk: Transition from Endogenous to Exogenous Nutrition in Fish

The Nature of Exocytosis in the Yolk Trophoblastic Layer of Silver Arowana (Osteoglossum bicirrhosum) Juvenile, the Representative of Ancient Teleost Fishes

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