Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico

Diadema mexicanum , a conspicuous inhabitant along the Mexican Pacific coast, is a key species for the dynamics of coral reefs; nevertheless, studies on population dynamics for this species are scarce. Monthly sampling was carried out between April 2008 and March 2009 at Isla Montosa and La Entrega,...

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Authors: Julia Patricia Díaz-Martínez, Francisco Benítez-Villalobos, Antonio López-Serrano
Format: article
Status:Published version
Publication Date:2015
Country:México
Institution:Universidad del Mar
Repository:Redalyc-UMAR
OAI Identifier:oai:redalyc.org:44943929014
Online Access:https://www.redalyc.org/articulo.oa?id=44943929014
https://www.redalyc.org/journal/449/44943929014/
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https://www.redalyc.org/journal/449/44943929014/44943929014.epub
https://www.redalyc.org/journal/449/44943929014/movil
Access Level:Open access
Keyword:Biología
Echinoidea
black urchin
Echinodermata
Population ecology
Mexican south Pacific
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spelling Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, MexicoJulia Patricia Díaz-MartínezFrancisco Benítez-VillalobosAntonio López-SerranoBiologíaEchinoideablack urchinEchinodermataPopulation ecologyMexican south PacificDiadema mexicanum , a conspicuous inhabitant along the Mexican Pacific coast, is a key species for the dynamics of coral reefs; nevertheless, studies on population dynamics for this species are scarce. Monthly sampling was carried out between April 2008 and March 2009 at Isla Montosa and La Entrega, Oaxaca, Mexico using belt transects. Population density was estimated as well as abundance using Zippin’s model. The relation - ship of density with sea-bottom temperature, salinity, pH, and pluvial precipitation was analyzed using a step by step multiple regression analysis. Spatial distribution was analyzed using Morisita’s, Poisson and negative binomial models. Natural mortality rate was calculated using modified Berry ’ s model. Mean density was 3.4 ± 0.66 ind·m -2 in La Entrega and 1.2 ± 0.4 ind·m -2 in Isla Montosa. Abundance of D. mexicanum in La Entrega was 12166 ± 25 individuals and 2675 ± 33 individuals in Isla Montosa. In Isla Montosa there was a positive relationship of density with salinity and negative with sea-bottom temperature, whereas in La Entrega there was not a significant relationship of density with any recorded environmental variable. Monthly mortality rate was 0.10 in La Entrega and 0.15 in Isla Montosa. Spatial distribution pattern was aggregated for both localities dur - ing the sampling period with oscillations in the intensity of aggregation. Higher density and abundance, and a low mortality rate, indicate better conditions for the population of D. mexicanum in La Entrega, contrasting with those of Isla Montosa where apparently there are more stressful conditions associated to stronger oceanographic conditions and a higher sedimentation rate resulting from the proximity of the Copalita River. Rev. Biol. Trop. 63 (Suppl. 2): 173-182. Epub 2015 June 01.Universidad de Costa Rica2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdf0034-7744https://www.redalyc.org/articulo.oa?id=44943929014https://www.redalyc.org/journal/449/44943929014/https://www.redalyc.org/journal/449/44943929014/html/https://www.redalyc.org/journal/449/44943929014/44943929014.epubhttps://www.redalyc.org/journal/449/44943929014/movilRevista de Biología Tropical (Costa Rica) Num.2 Vol.63reponame:Redalyc-UMARinstname:Universidad del Marinstacron:UMARenhttp://www.redalyc.org/revista.oa?id=449Revista de Biología Tropicalinfo:eu-repo/semantics/openAccessoai:redalyc.org:449439290142024-08-23T20:06:07Z
dc.title.none.fl_str_mv Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
title Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
spellingShingle Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
Julia Patricia Díaz-Martínez
Biología
Echinoidea
black urchin
Echinodermata
Population ecology
Mexican south Pacific
title_short Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
title_full Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
title_fullStr Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
title_full_unstemmed Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
title_sort Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico
dc.creator.none.fl_str_mv Julia Patricia Díaz-Martínez
Francisco Benítez-Villalobos
Antonio López-Serrano
author Julia Patricia Díaz-Martínez
author_facet Julia Patricia Díaz-Martínez
Francisco Benítez-Villalobos
Antonio López-Serrano
author_role author
author2 Francisco Benítez-Villalobos
Antonio López-Serrano
author2_role author
author
dc.subject.none.fl_str_mv Biología
Echinoidea
black urchin
Echinodermata
Population ecology
Mexican south Pacific
topic Biología
Echinoidea
black urchin
Echinodermata
Population ecology
Mexican south Pacific
description Diadema mexicanum , a conspicuous inhabitant along the Mexican Pacific coast, is a key species for the dynamics of coral reefs; nevertheless, studies on population dynamics for this species are scarce. Monthly sampling was carried out between April 2008 and March 2009 at Isla Montosa and La Entrega, Oaxaca, Mexico using belt transects. Population density was estimated as well as abundance using Zippin’s model. The relation - ship of density with sea-bottom temperature, salinity, pH, and pluvial precipitation was analyzed using a step by step multiple regression analysis. Spatial distribution was analyzed using Morisita’s, Poisson and negative binomial models. Natural mortality rate was calculated using modified Berry ’ s model. Mean density was 3.4 ± 0.66 ind·m -2 in La Entrega and 1.2 ± 0.4 ind·m -2 in Isla Montosa. Abundance of D. mexicanum in La Entrega was 12166 ± 25 individuals and 2675 ± 33 individuals in Isla Montosa. In Isla Montosa there was a positive relationship of density with salinity and negative with sea-bottom temperature, whereas in La Entrega there was not a significant relationship of density with any recorded environmental variable. Monthly mortality rate was 0.10 in La Entrega and 0.15 in Isla Montosa. Spatial distribution pattern was aggregated for both localities dur - ing the sampling period with oscillations in the intensity of aggregation. Higher density and abundance, and a low mortality rate, indicate better conditions for the population of D. mexicanum in La Entrega, contrasting with those of Isla Montosa where apparently there are more stressful conditions associated to stronger oceanographic conditions and a higher sedimentation rate resulting from the proximity of the Copalita River. Rev. Biol. Trop. 63 (Suppl. 2): 173-182. Epub 2015 June 01.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0034-7744
https://www.redalyc.org/articulo.oa?id=44943929014
https://www.redalyc.org/journal/449/44943929014/
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identifier_str_mv 0034-7744
url https://www.redalyc.org/articulo.oa?id=44943929014
https://www.redalyc.org/journal/449/44943929014/
https://www.redalyc.org/journal/449/44943929014/html/
https://www.redalyc.org/journal/449/44943929014/44943929014.epub
https://www.redalyc.org/journal/449/44943929014/movil
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv http://www.redalyc.org/revista.oa?id=449
dc.rights.none.fl_str_mv Revista de Biología Tropical
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Revista de Biología Tropical
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad de Costa Rica
publisher.none.fl_str_mv Universidad de Costa Rica
dc.source.none.fl_str_mv Revista de Biología Tropical (Costa Rica) Num.2 Vol.63
reponame:Redalyc-UMAR
instname:Universidad del Mar
instacron:UMAR
instname_str Universidad del Mar
instacron_str UMAR
institution UMAR
reponame_str Redalyc-UMAR
collection Redalyc-UMAR
repository.name.fl_str_mv
repository.mail.fl_str_mv
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