Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin

The spatial distribution of an intertidal population of the barnacle Balanus amphitrite was studied close to a sewage outfall near Quequén, Argentina (38° 34′ S, 58° 38′ 30″ W). All individuals within an area of 0.8 m2 were mapped during 12 censuses, from September 1990 to May 1993. Population densi...

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Autores principales: López Gappa, J., Calcagno, J.A., Tablado, A.
Formato: JOUR
Materias:
Argentina
Balanus amphitrite
Barnacle
Sewage
Spatial pattern
barnacle
popualtion density
population density
spatial pattern
spatial pattern]
Argentina, Buenos Aires Province, Quenquen
Cirripedia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00188158_v357_n1-3_p129_LopezGappa
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00188158_v357_n1-3_p129_LopezGappa
record_format dspace
spelling todo:paper_00188158_v357_n1-3_p129_LopezGappa2023-10-03T14:15:48Z Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin López Gappa, J. Calcagno, J.A. Tablado, A. Argentina Balanus amphitrite Barnacle Sewage Spatial pattern barnacle popualtion density population density spatial pattern spatial pattern] Argentina, Buenos Aires Province, Quenquen Balanus amphitrite Cirripedia The spatial distribution of an intertidal population of the barnacle Balanus amphitrite was studied close to a sewage outfall near Quequén, Argentina (38° 34′ S, 58° 38′ 30″ W). All individuals within an area of 0.8 m2 were mapped during 12 censuses, from September 1990 to May 1993. Population density within the study area varied between 401 and 99 ind m-2. Spatial pattern was analysed using mean distances to the nearest neighbour (NND), goodness of fit tests between observed and expected frequency distributions of NND, and analysis of crowding. The spatial pattern of the population was clumped during most of the study period. This trend persisted, although not reaching statistical significance, when the population density decreased as a consequence of mortality and failure of successive annual recruitments. The cohort recruited in summer 1992 (49 individuals) was randomly distributed relative to adult barnacles already present within the study area. No consistent relationship was observed between mortality and NND. © 1997 Kluwer Academic Publishers. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00188158_v357_n1-3_p129_LopezGappa
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Balanus amphitrite
Barnacle
Sewage
Spatial pattern
barnacle
popualtion density
population density
spatial pattern
spatial pattern]
Argentina, Buenos Aires Province, Quenquen
Balanus amphitrite
Cirripedia
spellingShingle Argentina
Balanus amphitrite
Barnacle
Sewage
Spatial pattern
barnacle
popualtion density
population density
spatial pattern
spatial pattern]
Argentina, Buenos Aires Province, Quenquen
Balanus amphitrite
Cirripedia
López Gappa, J.
Calcagno, J.A.
Tablado, A.
Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin
topic_facet Argentina
Balanus amphitrite
Barnacle
Sewage
Spatial pattern
barnacle
popualtion density
population density
spatial pattern
spatial pattern]
Argentina, Buenos Aires Province, Quenquen
Balanus amphitrite
Cirripedia
description The spatial distribution of an intertidal population of the barnacle Balanus amphitrite was studied close to a sewage outfall near Quequén, Argentina (38° 34′ S, 58° 38′ 30″ W). All individuals within an area of 0.8 m2 were mapped during 12 censuses, from September 1990 to May 1993. Population density within the study area varied between 401 and 99 ind m-2. Spatial pattern was analysed using mean distances to the nearest neighbour (NND), goodness of fit tests between observed and expected frequency distributions of NND, and analysis of crowding. The spatial pattern of the population was clumped during most of the study period. This trend persisted, although not reaching statistical significance, when the population density decreased as a consequence of mortality and failure of successive annual recruitments. The cohort recruited in summer 1992 (49 individuals) was randomly distributed relative to adult barnacles already present within the study area. No consistent relationship was observed between mortality and NND. © 1997 Kluwer Academic Publishers.
format JOUR
author López Gappa, J.
Calcagno, J.A.
Tablado, A.
author_facet López Gappa, J.
Calcagno, J.A.
Tablado, A.
author_sort López Gappa, J.
title Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin
title_short Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin
title_full Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin
title_fullStr Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin
title_full_unstemmed Spatial pattern in a low-density population of the barnacle Balanus amphitrite Darwin
title_sort spatial pattern in a low-density population of the barnacle balanus amphitrite darwin
url http://hdl.handle.net/20.500.12110/paper_00188158_v357_n1-3_p129_LopezGappa
work_keys_str_mv AT lopezgappaj spatialpatterninalowdensitypopulationofthebarnaclebalanusamphitritedarwin
AT calcagnoja spatialpatterninalowdensitypopulationofthebarnaclebalanusamphitritedarwin
AT tabladoa spatialpatterninalowdensitypopulationofthebarnaclebalanusamphitritedarwin
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