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An Atlas of Development of the Sea Urchin Echinometra Lucunter Utilizing Differential Interference Contrast, Light, and ...

Permanent Link: http://ncf.sobek.ufl.edu/NCFE003258/00001

Material Information

Title: An Atlas of Development of the Sea Urchin Echinometra Lucunter Utilizing Differential Interference Contrast, Light, and Scanning Electron Microscopy
Physical Description: Book
Language: English
Creator: Marcus, Lauren
Publisher: New College of Florida
Place of Publication: Sarasota, Fla.
Creation Date: 2003
Publication Date: 2003

Subjects

Subjects / Keywords: Sea Urchin
Echinometra lucunter
Development
Genre: bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract: The development of the sea urchin Echinometra lucunter has not been studied due to the fact its egg is highly pigmented. In this study, sections of embryos and whole embryos viewed with DIC, light, and SEM were used to observe development. In contrast to other species, the blastocoelic cavity of Echinometra lucunter expands during morphogenesis. The cleavage cavity widens during primary mesenchyme cell (PMC) ingression, one to two cleavage cycles before the embryo hatches from the fertilization envelope. During the mesenchyme blastula stage, the PMCs appear rounded up in rows from the hyaline layer to the blastocoel, ingressing into the blastocoel in rows appearing as a 'basket'. Primary invagination begins with the formation of bottle cells that cause the elongated vegetal plate cells to buckle into the blastocoel. The short, wide archenteron, or primitive gut, now resides within the blastocoel. Secondary elongation of the archenteron is limited due to the close proximity of the archenteron to the animal pole following primary invagination. Ventral curving of the prism is concurrent with thickening and stretching of the triradiate spicules. By the 2 arm pluteus, the larval gastrointestinal tract and skeleton are formed. A self sufficient 4 arm pluteus larvae is the result of early development.
Statement of Responsibility: by Lauren Marcus
Thesis: Thesis (B.A.) -- New College of Florida, 2003
Electronic Access: RESTRICTED TO NCF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE
Bibliography: Includes bibliographical references.
Source of Description: This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Local: Faculty Sponsor: Morrill, John

Record Information

Source Institution: New College of Florida
Holding Location: New College of Florida
Rights Management: Applicable rights reserved.
Classification: local - S.T. 2003 M3
System ID: NCFE003258:00001

Permanent Link: http://ncf.sobek.ufl.edu/NCFE003258/00001

Material Information

Title: An Atlas of Development of the Sea Urchin Echinometra Lucunter Utilizing Differential Interference Contrast, Light, and Scanning Electron Microscopy
Physical Description: Book
Language: English
Creator: Marcus, Lauren
Publisher: New College of Florida
Place of Publication: Sarasota, Fla.
Creation Date: 2003
Publication Date: 2003

Subjects

Subjects / Keywords: Sea Urchin
Echinometra lucunter
Development
Genre: bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract: The development of the sea urchin Echinometra lucunter has not been studied due to the fact its egg is highly pigmented. In this study, sections of embryos and whole embryos viewed with DIC, light, and SEM were used to observe development. In contrast to other species, the blastocoelic cavity of Echinometra lucunter expands during morphogenesis. The cleavage cavity widens during primary mesenchyme cell (PMC) ingression, one to two cleavage cycles before the embryo hatches from the fertilization envelope. During the mesenchyme blastula stage, the PMCs appear rounded up in rows from the hyaline layer to the blastocoel, ingressing into the blastocoel in rows appearing as a 'basket'. Primary invagination begins with the formation of bottle cells that cause the elongated vegetal plate cells to buckle into the blastocoel. The short, wide archenteron, or primitive gut, now resides within the blastocoel. Secondary elongation of the archenteron is limited due to the close proximity of the archenteron to the animal pole following primary invagination. Ventral curving of the prism is concurrent with thickening and stretching of the triradiate spicules. By the 2 arm pluteus, the larval gastrointestinal tract and skeleton are formed. A self sufficient 4 arm pluteus larvae is the result of early development.
Statement of Responsibility: by Lauren Marcus
Thesis: Thesis (B.A.) -- New College of Florida, 2003
Electronic Access: RESTRICTED TO NCF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE
Bibliography: Includes bibliographical references.
Source of Description: This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Local: Faculty Sponsor: Morrill, John

Record Information

Source Institution: New College of Florida
Holding Location: New College of Florida
Rights Management: Applicable rights reserved.
Classification: local - S.T. 2003 M3
System ID: NCFE003258:00001

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