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Exogonadal Oogenesis in a Temperate Holothurian
The Biological Bulletin, 2007Unusual structures were detected on the visceral peritoneum of the ovarian tubules in about 5%-10% of female sea cucumbers (Cucumaria frondosa) collected off Newfoundland, eastern Canada. The condition varied from mild to severe, with localized castration observed in the most heavily affected tubule sections.
Jean-François, Hamel +3 more
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The Biological Bulletin, 1909
1. In Leptosynapta inhœrens autotomy occurs regularly when unfavorable conditions of environment arise. Experiments with Thyone briareus did not show more than 35 per cent. of cases of autotomy, even under the most favorable circumstances for its occurrence.2. The mechanism involved in autotomy is quite different in the two genera.
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1. In Leptosynapta inhœrens autotomy occurs regularly when unfavorable conditions of environment arise. Experiments with Thyone briareus did not show more than 35 per cent. of cases of autotomy, even under the most favorable circumstances for its occurrence.2. The mechanism involved in autotomy is quite different in the two genera.
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Chemical Analysis of Holothurian Sclerites
Nature, 1958THE Holothuroidea differ from all other echinoderm classes in having a greatly reduced skeletal system. Typically, external plates are absent, while a peripharyngeal crown, anal plates, madreporite and spicules are usually present. Of these, the endoskeletal spicules (or ossicles), formed in superficial dermal layers, constitute the outstanding ...
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Ionic distribution and fluxes in holothurian tissues
Comparative Biochemistry and Physiology Part A: Physiology, 1974Abstract 1. 1. Ion content and distribution were determined in intestine and muscle of the holothurian Isostichopus badionotus. 2. 2. Intestinal cell potassium was 240 μ-equiv/g cell water proximally, 252 in mid gut and 121 distally, cell sodium was 246, 296 and 566 respectively; cell chloride was 223, 302 and 231. 3. 3.
I P, Zanders, F C, Herrera
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On the occurrence of vanadium in holothurians
Comparative Biochemistry and Physiology, 1962Abstract Vanadium analyses on nine species of holothurians, representing five genera, and including three species of Stichopus , failed to confirm the report of Phillips (1918) of a high concentration of vanadium in holothurians. Vanadium was found only in traces, 12 p.p.m. of dry weight, in the viscera and body fluids of Stichopus japonicus .
L S, CIERESZKO +3 more
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Statistical Analysis of Holothurian Sclerites
Micropaleontology, 1959The classification at present applied in the study of fossil holothurian sclerites is briefly outlined, and a major difficulty in the selection of valid criteria for the "speciation" of such microfossils is discussed. Groups of morphologically similar sclerites (morphogroups) derived from the Recent holothurians Holothuria impatiens (Forskael) and ...
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Commensal turbellarians from Bermuda holothurians
Canadian Journal of Zoology, 1980An investigation of some of the echinoderm fauna of the Bermuda Islands for endocommensal rhabdocoel turbellarians was conducted during June 1973 and produced new information concerning the biology of these worms. In addition to the identification of new host records for Anoplodiera voluta and Wahlia macrostylifera, a possible new species in the genus
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The psolid holothurian genus Lissothuria
Proceedings of the United States National Museum, 1967NH-Invertebrate Zoology ; si-staff ; NMNH ...
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The nutritional value of holothurians
Russian Journal of Marine Biology, 2015In the current decade, holothurians are becoming more popular among researchers due to the recently obtained data about the chemical structures and physiological activities of bioactive ingredients that are extracted from these marine invertebrates. In Southeast Asia, Japan, Korea, and China, the use of these animals as a valuable food product and an ...
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