TL;DR: Ten species of prosobranch gastropod veligers collected from the open waters of the North Atlantic Ocean have been identified by comparison of their larval shells with the protoconchs of identifiable juvenile or adult museum specimens.
Abstract: 1. Ten species of prosobranch gastropod veligers collected from the open waters of the North Atlantic Ocean have been identified by comparison of their larval shells with the protoconchs of identifiable juvenile or adult museum specimens. The larvae described are those of Cymatium parthenopeum (von Salis), Cymatium nicobaricum (Roding), and Charonia variegata (Lamarck) belonging to the family Cymatiidae; Tonna galea (Linne) and Tonna maculosa (Dillwyn) belonging to the family Tonnidae; Phalium granulatum (Born) belonging to the family Cassidae; Thais haemastoma (Linne), a muricid; Philippia krebsii (Morch), an architectonicidae; Smaragdia viridis (Linne), a neritid; and Pedicularia sicula Swainson belonging to the family Ovulidae.2. The geographical distribution of the veligers of these ten gastropod species has been determined in the North and tropical Atlantic from approximately eight hundred and fifty plankton tows. The relationship between the North and Equatorial Atlantic circulation and the dispersa...
TL;DR: In this paper, it was shown that veliger larvae, probably referable to Cymatium parthenopeum (von Salis), are commonly found throughout the Gulf Stream and North Atlantic drift and the average rate of transport of surface waters between the Bahamas and the Azores, computed from drift-bottle records, is 0·4 knots.
TL;DR: Evidence of what appears to be physiological specialization for prolonged delay of metamorphosis was found in larvae of this prosobranch gastropod.
Abstract: Larvae of the shallow-water marine gastropod Cymatium parthenopeum show no appreciable shell calcification and no demonstrable growth as they disperse across the Atlantic Ocean. Evidence of what appears to be physiological specialization for prolonged delay of metamorphosis was found in larvae of this prosobranch gastropod.
TL;DR: Giant Clam Mariculture and Ranellid Gastropods: Growth Rates and Consumption of Prey by Cymatium spp and Implications for the Ocean-Nursery Culture of Tridacnid Clams.
Abstract: xii 1 Introduction: Giant Clam Mariculture and Ranellid Gastropods 11 Giant Clams (Bivalvia: Tridacnidae) 1 Anatomy and Biology of the Tridacnidae 1 12 Mariculture of Giant Clams 3 The History of Giant Clam Mariculture 3 Giant Clam Culture Technology 3 Ocean-Nursery Culture of Tridacnid Clams 5 Predation in Tridacnid Mariculture 6 1 3 Ranellidae 8 Habitat Preferences of Ranellid Predators of Tridacnids 10 Ranellid Predators of Other Cultured Bivalves 12 Aims and Scope of the Present Work 13 2 Feeding Behavior of Cymatium spp Introduction 14 Materials and Methods 16 Feeding Methods 16 Preference Experiments 17 Time Required byC muricinum to KillT gigas 17 Results 18 Feeding Methods 18 Preference Experiments 21 Time Required by C muricinum to KillT gigas 23 Discussion 24 Feeding Methods 24 Prey Preference 25 Time Required byC muricinum to KillT gigas 27 Implications for the Ocean-Nursery Culture of Tridacnid Clams 27 EvolutionaryAdaptations of Bivalves to Ranellid Predation 28 3 Growth Rates and Consumption of Prey by Cymatium spp 3