Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 36 for “"Larval dispersal"”.
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Larval dispersal between hydrothermal vent habitats
… significant question in vent ecology. Planktonic larval forms provide a dispersive life stage for many species, but the exact mechanism and controls of dispersal are unknown. A description of larval distribution patterns, for which reliable identification of vent larvae is necessary, is critical …
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Larval dispersal between hydrothermal vent habitats
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1996.
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Tertiary marine prosobranchs: larval dispersal and geographic range
… 1978) and others have proposed that extensive larval dispersal allows marine invertebrate species to establish great geographic ranges; several studies along a single margin of an ocean basin have supported this proposal (Shuto, 1975; Hansen, 1978). This study makes use of the fossil record to …
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Trait-based modeling of larval dispersal in the Gulf of Maine
… species, population connectivity is driven by dispersal during a planktonic larval phase. The ability to obtain accurate, affordable, and meaningful estimates of larval dispersal patterns is therefore a key aspect of understanding marine ecosystems. Although field observations provide insight …
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Reproduction, settlement, and phenology of intertidal barnacles: implications for larval dispersal
… and, for crustaceans, smaller larvae; reduced larval dispersal distances; and reduced connectivity between coastal populations. However, these predictions are largely based on laboratory and modelling studies, with little observational research to explore how these interactions unfold in …
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Larval dispersal and population connectivity: implications for offshore renewable energy structures
… MRED arrays could provide stepping-stones for larval dispersal, mediating species range expansions or invasions. As common members of hard-substrate fouling communities and likely colonisers of MREDs, the larval dispersal processes of barnacles (Cirripedia: Thoracia) in the Firth of Lorn …
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Trait-based modeling of larval dispersal in the Gulf of Maine
… species, population connectivity is driven by dispersal during a planktonic larval phase. The ability to obtain accurate, affordable, and meaningful estimates of larval dispersal patterns is therefore a key aspect of understanding marine ecosystems. Although field observations provide insight …
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Reproduction, settlement, and phenology of intertidal barnacles: Implications for larval dispersal
… and, for crustaceans, smaller larvae; reduced larval dispersal distances; and reduced connectivity between coastal populations. However, these predictions are largely based on laboratory and modelling studies, with little observational research to explore how these interactions unfold in …
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Molecular Population Genetics of the Atlantic Sand Fiddler Crab, Uca Pugilator, Along the Atlantic Coast
… have a life cycle with an obligatory planktonic larval phase of 30-90 days, which might be expected to lead to widespread larval dispersal and consequent genetic homogeneity over considerable distances. However a large amount of morphological and behavioral variation is found between northern and …
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The Response of a protandrous species to exploitation, and the implications for management: a case study with patellid limpets
… a population fecundity model, a gamete dispersal model, and a fertilisation model. The model makes explicit account of sperm limitation, and is based upon data collected through field and laboratory investigations conducted as part of this thesis.<br/>The model was used to examine the …
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Geography, coloration and speciation in a genus of neotropical reef fishes (Gobiidae: Elacatinus)
… compared broad-scale distributions and presumed larval dispersal to infer the geographic barriers responsible for allopatric speciation. However, many marine clades show high species diversity in geographically restricted areas where barriers are not obvious and larval dispersal should bring …
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Abundance and Distribution of Early Life Stage Blue Crabs (Callinectes sapidus) in Lake Pontchartrain
… when assessing estuarine-wide C. sapidus post-larval dispersal processes.
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COMPARATIVE STUDY ON DROSOPHILA LARVAL LOCOMOTION AND NEUROMUSCULAR JUNCTION MORPHOLOGY
… these phenotypic differences. We describe larval peristaltic crawling in terms of speed, rate of contractions and dispersal efficiency. Comparisons across species show species-specific pattern of larval locomotion. Quantitative analyses on the NMJ anatomy reveal that the pattern of NMJ …
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Adult demography and larval processes in coastal benthic populations : intertidal barnacles in Southern California and Baja California
… by physical - biological interactions affecting larval dispersal and the demography of juvenile and adult individuals. This thesis focused on nearshore patterns of larval distribution and regional patterns in demography of intertidal barnacles in Southern and Baja California. Horizontal and …
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Geographical variation in the genus Astarte (Phylum Mollusca: Class Bivalvia) from the Yorktown and Jackson Bluff formations (early Pliocene) of the Atlantic coastal plain
… influencing geographical variation include larval dispersal strategy and the effect of the environment.
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Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galápagos Rift
… are punctuated by frequent physical disturbance. Larval dispersal among disjunct vent sites facilitates the persistence of sessile invertebrate species in these geologically and chemically dynamic habitats despite local extinction events. Regional population extension and rapid recolonization by …
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Adult demography and larval processes in coastal benthic populations intertidal barnacles in Southern California and Baja California
… by physical biological interactions affecting larval dispersal and the demography of juvenile and adult individuals. This thesis focused on nearshore patterns of larval distribution and regional patterns in demography of intertidal barnacles in Southern and Baja California. Horizontal and …
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Bet- hedging reproduction strategies in the massive Caribbean coral Favia fragum
… external fertilization success, appropriate larval dispersal and efficient coral recruitment. This study tested the ability of the brooding species Favia fragum to “hedge their bets” on reproductive strategies in the presence/ absence of lunar cues, a cue known to play an important role in …
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Sustainability of the gooseneck barnacle fishery in Asturias. Trends, drivers and lessons
… system. Next, we evaluated the effect of larval dispersal and landscape characteristics on the fishery and their management implications. Finally, we assessed how all these components led to a sustainable fishery despite the effect of external and internal feedbacks. The Asturian …
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Life history dynamics of nudibranch sibling species in the genus Dendronotus in the Gulf of Maine
<p>Two different larval types have been described for the nudibranch Dendronotus frondosus (Ascanius, 1774) in the Gulf of Maine. A taxonomic review of adults with planktrophic larvae and those with lecithotrophic larvae revealed regular differences in radula morphology, and no predictable …
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