1 resultado para Shopper Demographics
em DigitalCommons - The University of Maine Research
Filtro por publicador
- ABACUS. Repositorio de Producción Científica - Universidad Europea (2)
- Academic Archive On-line (Karlstad University; Sweden) (1)
- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (4)
- Aquatic Commons (6)
- ArchiMeD - Elektronische Publikationen der Universität Mainz - Alemanha (1)
- Archive of European Integration (4)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (3)
- Aston University Research Archive (33)
- Avian Conservation and Ecology - Eletronic Cientific Hournal - Écologie et conservation des oiseaux: (1)
- B-Digital - Universidade Fernando Pessoa - Portugal (2)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (24)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (3)
- Biblioteca Digital de la Universidad Católica Argentina (1)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (4)
- Bioline International (5)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (55)
- Brock University, Canada (17)
- Brunel University (1)
- Bucknell University Digital Commons - Pensilvania - USA (2)
- CaltechTHESIS (3)
- Cambridge University Engineering Department Publications Database (2)
- CentAUR: Central Archive University of Reading - UK (12)
- Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
- Cochin University of Science & Technology (CUSAT), India (3)
- Collection Of Biostatistics Research Archive (1)
- Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
- CORA - Cork Open Research Archive - University College Cork - Ireland (7)
- Cornell: DigitalCommons@ILR (2)
- Dalarna University College Electronic Archive (1)
- Deakin Research Online - Australia (166)
- DI-fusion - The institutional repository of Université Libre de Bruxelles (1)
- Digital Archives@Colby (3)
- Digital Commons @ DU | University of Denver Research (2)
- Digital Commons @ Winthrop University (2)
- Digital Commons at Florida International University (45)
- Digital Peer Publishing (1)
- DigitalCommons - The University of Maine Research (1)
- DigitalCommons@The Texas Medical Center (49)
- DigitalCommons@University of Nebraska - Lincoln (5)
- DRUM (Digital Repository at the University of Maryland) (4)
- Duke University (13)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (4)
- FUNDAJ - Fundação Joaquim Nabuco (1)
- Glasgow Theses Service (2)
- Helda - Digital Repository of University of Helsinki (5)
- Indian Institute of Science - Bangalore - Índia (3)
- Institute of Public Health in Ireland, Ireland (1)
- Instituto Politécnico de Viseu (4)
- Instituto Politécnico do Porto, Portugal (1)
- Instituto Superior de Psicologia Aplicada - Lisboa (3)
- Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States (2)
- Memoria Académica - FaHCE, UNLP - Argentina (3)
- National Center for Biotechnology Information - NCBI (2)
- Nottingham eTheses (2)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (2)
- Portal de Revistas Científicas Complutenses - Espanha (3)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (60)
- Queensland University of Technology - ePrints Archive (183)
- REPOSITÓRIO ABERTO do Instituto Superior Miguel Torga - Portugal (1)
- Repositório Científico da Universidade de Évora - Portugal (1)
- Repositório Científico do Instituto Politécnico de Lisboa - Portugal (3)
- Repositorio de la Universidad de Cuenca (3)
- Repositório digital da Fundação Getúlio Vargas - FGV (8)
- Repositório do Centro Hospitalar de Lisboa Central, EPE - Centro Hospitalar de Lisboa Central, EPE, Portugal (1)
- Repositório Institucional da Universidade de Aveiro - Portugal (1)
- Repositório Institucional da Universidade Federal do Rio Grande do Norte (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (48)
- Repositorio Institucional Universidad EAFIT - Medelin - Colombia (1)
- Research Open Access Repository of the University of East London. (1)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (6)
- Savoirs UdeS : plateforme de diffusion de la production intellectuelle de l’Université de Sherbrooke - Canada (1)
- Scielo España (1)
- SerWisS - Server für Wissenschaftliche Schriften der Fachhochschule Hannover (2)
- South Carolina State Documents Depository (1)
- Universidad de Alicante (1)
- Universidad del Rosario, Colombia (21)
- Universidad Politécnica de Madrid (3)
- Universidade de Lisboa - Repositório Aberto (4)
- Universidade Federal do Pará (3)
- Universidade Federal do Rio Grande do Norte (UFRN) (11)
- Universidade Técnica de Lisboa (1)
- Université de Lausanne, Switzerland (5)
- Université de Montréal, Canada (6)
- University of Canberra Research Repository - Australia (2)
- University of Connecticut - USA (5)
- University of Michigan (18)
- University of Queensland eSpace - Australia (23)
- University of Southampton, United Kingdom (2)
- University of Washington (12)
- WestminsterResearch - UK (2)
- Worcester Research and Publications - Worcester Research and Publications - UK (2)
Resumo:
Pioneering work by J. Stan Cobb described how habitat architecture and body size scaling affect shelter-related behavior of American lobsters. Subsequent research suggested that shelter availability and competition could set local carrying capacity and demographics for this species. To determine how shelter spacing affects population density, the intensity of intraspecific competition and the distribution of body size for this species, I deployed sets of 10 identically sized artificial shelters spaced at distances of 2.5, 0.5, 1.0, 1.5 and 2.0 meters on otherwise featureless substrate at 10 m depth in mid-coast Maine, U.S.A. Five sets had two parallel strings of five opposing shelters and an additional linear string set 2 to apart without opposing shelters was the most widely separated treatment. Shelters spaced I m apart and closer had higher lobster population densities, more intraspecific competition and higher proportions of empty shelters. Surprisingly, lobsters there were also significantly smaller, declining from 62.7 mm to 50.9 on the carapace (CL) for 2 to linear to 0.25 m spaced shelters, respectively. Nearly all 932 lobsters measured in this study were juvenile (< 90 mm CL) and preharvestable (< 83 mm CL) sized, so mate selection and fishing effects were unlikely. At the scale of the experiment, larger lobsters leave or avoid areas of high lobster population density and intense competition for areas of low population density and relaxed competition (called "demographic diffusion"). Scuba surveys in coastal zones found lobster population densities scale with shelter densities and were highest in boulder habitat where, like the experiment, more than half the shelters were vacant. Fisheries independent scuba and trawl surveys in Maine's shallow coastal zone repeatedly recorded declines of preharvestable, lobsters larger than 60 turn CL in size and increases of those sizes offshore and in deep water. It is possible that this demographic diffusion is driven by behaviors associated with intraspecific shelter competition.