STUDIES ON CORTICAL ALVEOLI IN SOME TELEOSTEAN EGGS<sup>1)</sup>

Kusa, Mamoru

doi:10.1111/j.1440-169x.1956.tb00064.x

Cited by 35 publications

(4 citation statements)

References 30 publications

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“…The cortical alveoli of M. robustus contain glucoproteins positive to PAS reaction, similar to documented in other teleost species (Kusa, 1956;Selman et al, 1988;Quagio-Grassiotto et al, 2014). The inner-acidophilic granules of the cortical alveoli seen in M. robustus and positive to PAS reaction were similar to those documented by , Wallace and Selman (1981), Yamamoto (1951aYamamoto ( , 1951b and Kusa (1956). According to Domínguez-Castanedo et al (2016), the cortical alveoli of M. robustus and F. heteroclitus are the largest reported in the literature.…”

Section: Primary Growth Stagesupporting

confidence: 84%

Ovarian structure, folliculogenesis and oogenesis of the annual killifish Millerichthys robustus (Cyprinodontiformes: Cynolebiidae)

Domínguez-Castanedo

Uribe

2019

Journal of Morphology

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Cellular aspects of oocyte development of the Mexican rivulus Millerichthys robustus were morphologically described in order to analyze ovarian function and the cellular recruitment dynamics associating it with life history strategies of annual killifishes. Millerichthys is an iteroparous batch spawner with continuous oocyte recruitment and indeterminate fecundity with asynchronous development of the follicles. It has two ovaries of cystovarian type, with a central lumen, which communicates with the outside through the caudal region of the ovary, that is, the gonoduct. From the walls of the ovary, irregular lamellae composed of germinal epithelium and vascularized stroma project. Oogenesis starts with oogonial proliferation, found alone or in nests within the germinal epithelium. The oogonia come into meiosis becoming oocytes and advancing to the chromatin nucleolus stage and to early primary growth stage. Folliculogenesis is completed in the primary growth stage and cortical alveoli step. Follicles moves toward the stroma, but they continue to be attached to the germinal epithelium through the basement membrane until ovulation. The inclusion of fluid yolk in the follicles during the secondary growth stage was observed. During ovulation, the follicle collapsed, the oocyte was released into the lumen, and the constitutive elements of the post‐ovulatory follicle complex remained in the stroma.

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Section: Primary Growth Stagesupporting

confidence: 84%

Ovarian structure, folliculogenesis and oogenesis of the annual killifish Millerichthys robustus (Cyprinodontiformes: Cynolebiidae)

Domínguez-Castanedo

Uribe

2019

Journal of Morphology

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“…Early investigators reported that upon fertilization, CABD begins at the animal pole, where a spermatozoon attaches, and ends at the vegetal pole in the goldfish (Tchou and Chen, 1936) and in the medaka (Yamamoto, 1939). The same phenomenon has since been observed in eggs of many teleosts (see Kusa, 1956). Now, it is well known that a wave-like CABD propagates from the animal pole to the vegetal pole upon fertilization, following an invisible fertilization wave, which starts from the sperm entry site in teleost eggs (Yamamoto, 1961).…”

Section: Discussionmentioning

confidence: 75%

Cortical alveolus breakdown in the eggs of the freshwater teleost Rhodeus ocellatus ocellatus

et al. 1990

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Cortical alveoli and their breakdown in the eggs of the rose bitterling were morphologically investigated. Cortical alveoli of various sizes existed in multiple layers within the cortical cytoplasm of each egg. Two types of cortical alveoli were recognized--one possessed homogeneous contents; the other possessed heterogeneous contents with electron-less dense spots. The eggs were activated by a penetrating spermatozoon or by immersion in fresh water. The immersion of the eggs into fresh water induced a wave of cortical alveolus breakdown (CABD), which was propagated from the vegetal pole to the animal pole. When eggs were inseminated in fresh water, CABD progressed from both the vegetal and the animal poles of the egg, and was complete within about 20 min. The contents of the cortical alveoli were released into the perivitelline space through a large opening formed by the fusion of the plasma and cortical alveolar membranes. For a short time after CABD, the smooth inner surfaces of the cortical alveoli were readily discernible from the rougher original plasma membrane. About 30 min after immersion in fresh water, the inner surfaces of the cortical alveoli were indistinguishable from the original egg surfaces. Aequorin-injected eggs became luminescent immediately after their immersion in fresh water. The luminescence reached a maximum level about 15 min later and subsided after roughly 30 min. The result shows that increase in intracellular free Ca ions occurs during CABD.

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“…In these steps, cortical alveoli of Millerichthys robustus reached their largest size and were arranged in a single continuous layer, similar to what was observed by Bazzoli and Godinho () in the characid Roeboides paranensis . The size of these structures was larger than those recorded by Anderson () in the syngnathid Syngnathus fuscus (12 µm); Kusa () in the gasterosteids Pungitius pungitius and P. tymensis (25 µm); Kudo () in the cyprinids Carassius gibelio auratus (25 µm); Cyprinus carpio and C. auratus (28 µm); Selman et al () in Danio rerio (25 µm); and Mester et al () in the percid Perca fluviatilis (30 µm); and the esocid Esox lucius (35 µm). However, it was similar to those of the cyprinodontiform killifish Fundulus.…”

Section: Discussionmentioning

confidence: 79%

Morphological development of the structures related to annualism in the ovarian follicle of the killifish Millerichthys robustus (Costa,1995) (Teleostei: Cyprinodontiformes)

Domínguez-Castanedo

Uribe

Rosales‐Torres

2016

Journal of Morphology

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Ovaries of five females of the annual fish teleost species Millerichthys robustus were processed, and the development of the cortical alveoli, zona pellucida and secondary envelope during oogenesis were described. We also documented the origin of the cortical alveoli in time and space similar to the Balbiani body; the synthesis of three generations of cortical alveoli and an active zona pellucida prior to vitellogenesis, which is implicated in the entry of oils to the interior of the oocyte. We found that in this species, the diameter of the alveoli is greater than in the other teleost fish species reported in the literature, except for Fundulus heteroclitus, in which the diameter is similar. The thickness of the zona pellucida recorded in M. robustus is the greatest reported to date. Likewise, two periods of secondary envelope deposition were documented: filaments during pre-vitellogenesis and, subsequently, trapeze-shaped projections during the maturation of the oocytes. We report about development of structures that are considered key for the survival of embryos in annual fish during the long periods of diapause in their extreme habitats. The development of peripheral structures described here probably reflects the changes in the physiology of the oocytes in M. robustus. J. Morphol. 277:1219-1230, 2016. © 2016 Wiley Periodicals, Inc.

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STUDIES ON CORTICAL ALVEOLI IN SOME TELEOSTEAN EGGS¹⁾

Cited by 35 publications

References 30 publications

Ovarian structure, folliculogenesis and oogenesis of the annual killifish Millerichthys robustus (Cyprinodontiformes: Cynolebiidae)

Ovarian structure, folliculogenesis and oogenesis of the annual killifish Millerichthys robustus (Cyprinodontiformes: Cynolebiidae)

Cortical alveolus breakdown in the eggs of the freshwater teleost Rhodeus ocellatus ocellatus

Morphological development of the structures related to annualism in the ovarian follicle of the killifish Millerichthys robustus (Costa,1995) (Teleostei: Cyprinodontiformes)

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STUDIES ON CORTICAL ALVEOLI IN SOME TELEOSTEAN EGGS1)

Cited by 35 publications

References 30 publications

Ovarian structure, folliculogenesis and oogenesis of the annual killifish Millerichthys robustus (Cyprinodontiformes: Cynolebiidae)

Ovarian structure, folliculogenesis and oogenesis of the annual killifish Millerichthys robustus (Cyprinodontiformes: Cynolebiidae)

Cortical alveolus breakdown in the eggs of the freshwater teleost Rhodeus ocellatus ocellatus

Morphological development of the structures related to annualism in the ovarian follicle of the killifish Millerichthys robustus (Costa,1995) (Teleostei: Cyprinodontiformes)

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STUDIES ON CORTICAL ALVEOLI IN SOME TELEOSTEAN EGGS¹⁾