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Gamete spawning and fertilization in the gymnolaemate bryozoan Membranipora membranacea.
The Biological Bulletin; 10/1/1994; Temkin, M.H.; 5725 words
; Introduction In 1966, Silen reported that external cross-fertilization occurred in two gymnolaemate bryozoan species, Electra posidoniae and E. crustulenta. This report contradicted the 100-year-old belief that internal self-fertilization is obligatory in this group of hermaphroditic invertebrates
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Waveform dynamics of spermatozeugmata during the transfer from paternal to maternal individuals of Membranipora membranacea.
The Biological Bulletin; 2/1/2004; Temkin, M.H. Bortolami, S.B.; 6584 words
; Introduction Fertilization success for many benthic marine invertebrates is dependent on the transfer of sperm or an aggregate of sperm from males to females through the water column (see Franzen, 1956, 1998; Ryland and Bishop, 1993). Sperm aggregates may be either encapsulated (spermatophores) or
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Changes in larval morphology in the evolution of benthic development by Patiriella exigua (Asteroidea: Asterinidae), a comparison with the larvae of Patiriella species with planktonic development.
The Biological Bulletin; 6/1/1995; Byrne, M.; 6329 words
; Introduction The sea star Patiriella exigua (Lamarck) is a conspicuous component of the intertidal echinoderm fauna of southeastern Australia and is a member of a sympatric group of Patiriella species distributed around the south coast from Western Australia to north Queensland (Dartnall, 1971;
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PROGRAM OF THE 44TH ANNUAL MEETING.
Bulletin of the New Jersey Academy of Science; 3/22/1999; 21103 words
; MORNING AND AFTERNOON TECHNICAL SESSIONS GENERAL POSTER SESSION MATRIX PROTEINS AND ESTROGEN AFFECT PROLIFERATION OF DERMAL FIBROBLASTS AND KERATINOCYTES KAREN KOSKOWICZ, S. HANRAHAN, K. McFADDEN (STUDENTS); NEENA PHILIPS Biology Department, Georgian Court College, Lakewood, NJ 08701 Tissue
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Evaluation of coelioscopic splenic biopsy and cloacoscopic bursa of fabricius biopsy techniques in pigeons (Columba livia).(Original Studies)
Journal of Avian Medicine and Surgery; 12/1/2006; Hernandez-Divers, Stephen J. Wilson, G. Heather Lester, Vanessa K. Hernandez-Divers, Sonia M. Latimer, Kenneth S. Ritchie, Branson W.; 3239 words
; Abstract: Techniques for endoscopic biopsy of the spleen and bursa of Fabricius were evaluated in 71 juvenile and adult white Carneau pigeons (Columba livia). Splenic biopsy was performed under isoflurane anesthesia by a left lateral approach to the coelom from behind the last rib. From within the
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The structure and mode of function of the water vascular system of a brittlestar, Ophioderma appressum.
The Biological Bulletin; 2/1/1995; Ferguson, John C.; 5132 words
; Introduction One of the most distinctive characteristics of echinoderms is their water vascular system - a unique arrangement of fluid-filled coelomic passages and associated parts. The general form of these structures in the different echinoderm classes has been summarized by Hyman (1955) and
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Madreporite function and fluid volume relationships in sea urchins.
The Biological Bulletin; 12/1/1996; Ferguson, John C.; 5107 words
; Introduction Sea urchins, like many other echinoderms, possess a conspicuous sieve-like opening to the exterior, the mad-reporite. This structure might be expected to have a function in fluid volume regulation, but no such role has ever been demonstrated. The madreporite is attached to a ciliated
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Evidence for sequential hermaphroditism in Sabellastarte spectabilis (polychaeta: sabellidae) in Hawai'i (1).
Pacific Science; 10/1/2006; Bybee, David R. Bailey-Brock, Julie H. Tamaru, Clyde S.; 3101 words
; Abstract: Understanding the reproductive characteristics of Sabellastarte spectabilis (Grube, 1878), an economically important polychaete worm collected for the aquarium trade, is essential to the development of artificial propagation and conservation of coral reefs. The purpose of this study was
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Morphogenesis and organogenesis in the regenerating planktotrophic larvae of asteroids and echinoids.
The Biological Bulletin; 10/1/2002; Vickery, Minako S. Vickery, Michael C.L. McClintock, James B.; 6819 words
; Introduction Regeneration has been described at both the cellular and the tissue level in many animals including planarians, crustaceans, reptiles, and amphibians (Goss, 1969; Mattson, 1976; Baguna et al., 1989; Martin, 1997; Hopkins, 2001). Many adult echinoderms, including asteroids, ophiuroids,
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Respiratory and acid-base physiology of the purple sea urchin, Strongylocentrotus purpuratus, during air exposure: presence and function of a facultative lung.
The Biological Bulletin; 8/1/2002; Burnett, Louis Terwilliger, Nora Carroll, Amy Jorgensen, Darwin Scholnick, David; 6599 words
; Introduction Intertidal organisms experience bouts of exposure to air, or emersion; these bouts vary in duration with the motility of the organism and the magnitude of the tide. Many intertidal organisms take up oxygen from the air during air exposure and thus sustain aerobic metabolism (deFur,
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