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O-4 CONDITIONAL ESTIMATION IN AN EXPONENTIAL MODELSmail MahdiDepartment of Computer Science, Mathematics and Physics, Cave HillPreliminary test procedure is often used in statistical inference to fit appropriate models for data sets.In analysis of variance, the procedure is used to test whether interactions of higher order aresignificant before doing the final inference. In this paper, we present an overview of this procedureand apply it to estimate the parameters of an exponential population. We also present a study on theaccuracy of the proposed estimator.O-5 MONGOOSE PREDATION ON ISLAND FAUNA:AN EXPERIMENTAL TEST IN A JAMAICAN DRY FORESTByron S. Wilson and Peter VogelDepartment of Life Sciences, MonaAn overriding theme in the extinction of island reptiles is the introduction (by man) of potentmammalian predators such as dogs, cats, rats, and most notoriously, the Indian mongoose, Herpestesauropunctatus (Pimm, 1986, Case and Bolger 1991). Although the evidence for the role of themongoose in causing reptile extinctions is largely correlative, it is nevertheless overwhelming(Barbour 1930, Case and Bolger 1991). Island extinctions following the introduction of themongoose have been reported frequently, especially in the Caribbean (Case and Bolger 1991,Schwartz and Henderson 1991, Corke 1992). Besides man, no exotic predator has ever beenimplicated in so many island extinctions. In Jamaica alone, the mongoose has been associated withthe extinction or near extinction of at least two endemic birds and four endemic reptiles.Unfortunately, little experimental research effort has been directed at the mongoose issue.Here we describe research aimed at determining the efficacy of using mongoose control as a longtermmanagement strategy for preserving biodiversity. Specifically, we outline an experimentalstudy that seeks to determine the community-wide consequences of mongoose removal. We haveestablished experimental (=mongoose removal) and control (no mongoose removal) plots in theinterior of the Hellshire Hills, and are currently employing a variety of census techniques to study theresponse of selected prey species of the mongoose. In particular, we are using an extensive series ofpitfall traps to index the abundance of terrestrial species such as lizards, snakes, and largearthropods (e.g., arachnids,insects). In addition, we are using survey techniques to estimate the relative abundance of theCaribbean ground dove, and have established mark-recapture plots to examine the demographicresponse of Anolis lizards. Hence, our efforts focus on elucidating the demographic response ofdiverse taxa to the experimental removal of a potent exotic predator.In this presentation we will document the effectiveness of our mongoose removal program, andpresent some preliminary results concerning the demographic responses of targeted species. We alsoreport on some exciting results from our on-going efforts to document biodiversity in the HellshireHills. Specifically, we describe the discovery of a population of the rare and beautiful Jamaicanlizard, the Blue-tailed galliwasp -- known to science from only two specimens -- both collected over50 years ago at Portland Ridge in Clarendon.24
We thus not only document that the species still exists, but also delineate a major range extension forthe species. In addition, we highlight the recent collection of two endemic snake species notpreviously recorded from the Hellshire Hills -- the Jamaican boa (or "yellow snake"), and a form ofWest Indian dwarf boa (unresolved taxonomically at the time of this writing).ReferencesBarbour, T. (1930). Some faunistic changes in the Lesser Antilles. Proc. New England Zool. Club.11:73-85.Case, T. J. & D. T. Bolger (1991). The role of introduced species in shaping the distribution andabundance of island reptiles. Evolutionary Ecology 5:272-290.Corke, D. (1992). The status and conservation needs of the terrestrial herpetofauna of theWindward Islands (West Indies). Biological Conservation 62:47-58.Pimm, S. L. (1986). Community stability and structure. Pages 309-329 in M. E. Soule, editor.Conservation biology: the science of scarcity and diversity. Sinauer Associates, Inc.Sunderland, Massachusetts, USA.Schwartz, A. & R. W. Henderson (1991). Amphibians and reptiles of the West Indies:descriptions, distributions, and natural history. University of Florida Press, Gainesville,Florida, USA.O-6 THE ABUNDANCE AND DISTRIBUTION OF EPIBENTHICBRYOZOANS ON THE ROOTS OF RHIZOPHORA MANGLE INAND AROUND KINGSTON HARBOUR, JAMAICAMarcia Marilyn Chevannes CrearyCentre for Marine Sciences, MonaThe abundance and distribution of the bryozoan species on the prop roots of the red mangrove,Rhizophore mangle, at diverse locations around Kingston Harbour are described. Specificenvironmental parameters were examined to investigate their relative effects on the pattern ofabundance and distribution observed. The study was carried out in four mangrove areas (PortRoyal, Great Salt Pond, Dawkins Pond and Hunt's Bay) over a 15 month period between September1994 and December 1995 and included a total of 12 stations.The submerged roots of some mangrove tree species provide a natural substrate for the attachmentof a variety of sessile organisms including bryozoans. The phylum bryozoa is characterized byhaving lophophores and are mainly marine colonial organisms forming encrustations or tufts on anassortment of substrates. They are found in a variety of habitats around Kingston Harbour whichexhibit differing degrees of exposure to pollution.This study identified 18 species of bryozoa inhabiting the rhizophore community. Diversity wasfound to be highest in Port Royal with 16 species while Hunt's Bay had the lowest diversity havingonly 3 species. Great Salt Pond and Dawkins Pond had 8 and 3 species respectively.25
Page 1 and 2: _________________________PROCEEDING
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Page 6 and 7: FREE ORAL PRESENTATIONSChemistry Le
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Page 10 and 11: GEOLOGY____________________________
Page 12 and 13: POSTER PRESENTATIONSDisplayed in De
Page 14 and 15: P-20 The compatibility of a thiodan
Page 16 and 17: P-37 Genetic diversity in dasheens
Page 18 and 19: P-55 Trinidad clays as a potential
Page 20 and 21: B. Bark beetles (3 species). The ba
Page 22 and 23: Figure:Population of adult weevils,
Page 26 and 27: Six growth forms were observed, all
Page 28 and 29: The difference in coral cover among
Page 30 and 31: Examination of whole and sectioned
Page 32 and 33: Ultimately one of the aims of many
Page 34 and 35: Table:Concentrations of chlorpyrifo
Page 36 and 37: Table: Half life of Miral 500CS on
Page 38 and 39: Nucleotide sequence analysis of the
Page 40 and 41: Regardless of the level of fertiliz
Page 42 and 43: Various morphological, physiologica
Page 44 and 45: O-25 HAIMEA ALTA AND HAIMEA OVUMSER
Page 46 and 47: A complete thermodynamic descriptio
Page 48 and 49: One of the promising methods of det
Page 50 and 51: We aim at producing a model which c
Page 52 and 53: in comparison to the function f giv
Page 54 and 55: The scripting language described he
Page 56 and 57: O-36 CRYPTOGRAPHY AND THE INFORMATI
Page 58 and 59: ABSTRACTS OF POSTER PRESENTATIONS__
Page 60 and 61: The varied range of effects to the
Page 62 and 63: P-5 THE USE OF INFORMATION SYSTEMS
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Page 66 and 67: P-9 INDIVIDUAL ZOOPLANKTON SPECIES
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M. tuberculata was found only at tw
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Thiara granifera is gregarious, pro
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The population of the CLM in Jamaic
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The present studies were undertaken
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P-21 ANTIFEEDANT PROPERTIES OF VARI
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ReferencesClarke-Harris, D.O. (1998
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Mansingh, A., Robinson, D.E. and Da
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P-24 THE NEW JAMAICA SEISMOGRAPH NE
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P-26 JUPITER LANDSLIDE, RIO GRANDE
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P-27 BIOSTRATIGRAPHIC INVESTIGATION
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P-28 EVALUATION OF MEDIA, METHODS O
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P-31 PHYSIOLOGICAL ECOLOGY OF TEN P
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2. Stavely, J.R., Steadman, J.R. 19
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P-36 IDENTIFICATION, DISTRIBUTION,
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Todd G. A., Daniels M. J. and Callo
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P-42 QUANTIFICATION AND IDENTIFICAT
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P-46 A STUDY OF VIBRIO SPECIES IN R
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P-49 INDOOR LEVELS OF NO2 MEASURED
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Qualitative assessment of these sig
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P-55 TRINIDAD CLAYS AS A POTENTIAL
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The procedure was applied to the Pi
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