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Showing 1 to 6 of 6 for “"Hydrozoa"”.
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OOGENESIS IN TUBULARIA LARYNX AND TUBULARIA INDIVISA (HYDROZOA, ATHECATA)
<p>In Tubularia larynx and T. indivisa, interstitial cells proliferate in the ectoderm of the gonophore stalk and peduncle of the raceme and migrate in the endoderm to the apex of the young gonophore buds where they proliferate in the endoderm to form the entocodon and germ cell mass. Eggs are …
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Biological studies of Bimeria franciscana (Hydrozoa: gymnoblastea) from the Petaluma River, California
<p>The athecate hydroid Bimeria franciscana Torrey has been found in estuarine habitats throughout the world. For this study B. franciscana was collected along the docks of the Petaluma River, California, a new collection site. Investigations on the appearance and biology of this hydroid have not …
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Integrating genomic, transcriptomic and developmental approaches to investigate coloniality and life cycle evolution in the Hydractiniidae (Hydrozoa: Cnidaria)
… life history characters of the cnidarian class Hydrozoa, including the transition from solitary to colonial forms, an elaboration of coloniality known as polyp polymorphism, and medusae (jellyfish) evolution and loss. While these characters have been repeatedly explored phylogenetically, …
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The Biology of a Colonial Hydroid
… found that the feeding reactions of three other Hydrozoa are controlled by reduced glutathione. Time-lapse cinematography of the colonies has revealed proximally-oriented peristaltic waves which apparently act to circulate nutrients through the colonies. These waves are rhythmic, and occur about …
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Life cycle evolution and systematics of Campanulariid hydrozoans
… and systematics. The Campanulariidae is a hydrozoan family with many life cycle variations, and provide an excellent model system to study life cycle evolution. Additionally, the unique campanulariid Obelia medusae may have been "re-invented" from ancestors without medusae. Chapter 1 …
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ΤΑ ΣΙΦΩΝΟΦΟΡΑ ΥΔΡΟΖΩΑ ΤΩΝ ΕΛΛΗΝΙΚΩΝ ΘΑΛΑΣΣΩΝ (ΜΟΡΦΟΤΑΞΟΝΟΜΙΑ, ΟΙΚΟΓΕΩΓΡΑΦΙΑ, ΙΣΤΟΛΟΓΙΑ)
ΘΕΜΑ ΕΙΝΑΙ Η ΜΕΛΕΤΗ ΤΩΝ ΣΙΦΩΝΟΦΟΡΩΝ ΤΩΝ ΕΛΛΗΝΙΚΩΝ ΘΑΛΑΣΣΩΝ, ΓΙΑ ΧΡΟΝΙΚΗ ΠΕΡΙΟΔΟ 10 ΕΤΩΝ. ΕΙΝΑΙ ΣΗΜΑΝΤΙΚΗ ΓΙΑΤΙ ΕΓΙΝΕ ΣΕ ΕΥΡΥ ΓΕΩΓΡΑΦΙΚΟ ΧΩΡΟ, ΠΟΥ ΚΑΛΥΠΤΕΙ ΣΧΕΔΟΝ ΟΛΑ ΤΑ ΕΛΛΗΝΙΚΑ ΠΕΛΑΓΗ (Β. ΚΑΙ Ν. ΑΙΓΑΙΟ) ΚΑΙ ΤΟΥΣ ΠΕΡΙΣΣΟΤΕΡΟΥΣ ΑΠΟ ΤΟΥΣ ΚΥΡΙΟΤΕΡΟΥΣ ΚΟΛΠΟΥΣ (Β. ΕΥΒΟΙΚΟΣ, ΣΑΡΩΝΙΚΟΣ, ΠΑΓΑΣΗΤΙΚΟΣ). …