Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast

Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast

Notoacmea biradiata (Reeve, 1855) is an abundant intertidal limpet on the rocky shore of the Colombian Pacific coast. This paper reports a field factorial experiment on shell-size variation of N. biradiata as a response to two independent factors: intertidal gastropod density and shore height above...

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Autores principales: Giraldo, A, Gómez, C, Rodríguez, E
格式: Online
语言:eng
出版: Iniversidad Autónoma de Baja California 2002
在线阅读:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/228
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spelling oai:cienciasmarinas.com.mx:article-2282019-04-30T19:14:45Z Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast Tamaño de la concha de Notoacmea biradiata (Archaeogastropoda: Acmaeidae) como respuesta a la densidad de gasterópodos y altura intermareal en la costa pacífica de Colombia Giraldo, A Gómez, C Rodríguez, E Notoacmea limpet intertidal rocky shore Pacific Ocean Colombia Notoacmea patelas playa rocosa intermareal Océano Pacífico Colombia Notoacmea biradiata (Reeve, 1855) is an abundant intertidal limpet on the rocky shore of the Colombian Pacific coast. This paper reports a field factorial experiment on shell-size variation of N. biradiata as a response to two independent factors: intertidal gastropod density and shore height above sea level. Four rocky shores were selected on the Colombian Pacific coast, two in Gorgona Island and two in Utr?Cove. The intertidal gastropods density was determined in each rocky shore using the transect-quadrant technique. Significant differences were observed in the gastropod densities between study sites: low density in the rocky shores of Utr?Cove and high density in the rocky shores of Gorgona Island (P < 0.009). A factorial sampling was conducted to determine the effect of the density and height on the shore over shell-length, shell-height and shell-thickness. A twoway ANOVA and a least-squared regression was used to determine whether the shell-sizes differ between varying densities and shore heights. Intertidal gastropod density was found to be the dominant factor in determining basal shell length (ANOVA, P < 0.001) and shell height (ANOVA P < 0.05) changes. Thus, at low population densities the shells are larger and taller. The height on the shore did not influence the shell-size of N. biradiata (ANOVA, P > 0.30). Notoacmea biradiata (Reeve, 1855) es un gasterópodo patelado abundante en las playas rocosas intermareales del Pacífico colombiano. En este estudio se presentan los resultados de un experimento factorial sobre la variación en el tamaño de la concha de N. biradiata como respuesta a dos factores independientes: la densidad de gasterópodos intermareales y la altura intermareal. Para el estudio, se seleccionaron cuatro playas rocosas intermareales en el Pacífico colombiano, dos en la Isla Gorgona y dos en la Ensenada de Utría. Se determinó la densidad de gasterópodos intermareales en cada sitio utilizando la técnica del transectocuadrante. Se encontraron diferencias significativas de densidad entre los sitios de estudio: baja densidad en las playas rocosas de la Ensenada de Utría y alta densidad en las playas rocosas de la Isla Gorgona (P < 0.009). Se realizó un muestreo factorial para evaluar el efecto de la densidad de gasterópodos y la altura intermareal sobre la longitud, altura y grosor de la concha. Se utilizó un análisis de varianza de dos vías y un análisis de regresión lineal para establecer las diferencias en el tamaño de la concha debido a la densidad o a la altura intermareal. Los resultados obtenidos sugieren que la densidad de gasterópodos intermareales determina las variaciones de la longitud de la abertura (P < 0.001) y altura de la concha (P < 0.05), encontrando conchas grandes y altas en zonas de baja densidad, mientras que la altura intermareal no fue fuente de varianza para el tamaño de la concha (ANOVA, P > 0.30). Iniversidad Autónoma de Baja California 2002-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/228 10.7773/cm.v28i3.228 Ciencias Marinas; Vol. 28 No. 3 (2002); 237-246 Ciencias Marinas; Vol. 28 Núm. 3 (2002); 237-246 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/228/195
institution Ciencias Marinas
collection OJS
language eng
format Online
author Giraldo, A
Gómez, C
Rodríguez, E
spellingShingle Giraldo, A
Gómez, C
Rodríguez, E
Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast
author_facet Giraldo, A
Gómez, C
Rodríguez, E
author_sort Giraldo, A
title Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast
title_short Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast
title_full Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast
title_fullStr Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast
title_full_unstemmed Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast
title_sort shell-size variation of notoacmea biradiata (archaeogastropoda: acmaeidae) as a response to gastropod density and height in shore in the colombian pacific coast
description Notoacmea biradiata (Reeve, 1855) is an abundant intertidal limpet on the rocky shore of the Colombian Pacific coast. This paper reports a field factorial experiment on shell-size variation of N. biradiata as a response to two independent factors: intertidal gastropod density and shore height above sea level. Four rocky shores were selected on the Colombian Pacific coast, two in Gorgona Island and two in Utr?Cove. The intertidal gastropods density was determined in each rocky shore using the transect-quadrant technique. Significant differences were observed in the gastropod densities between study sites: low density in the rocky shores of Utr?Cove and high density in the rocky shores of Gorgona Island (P < 0.009). A factorial sampling was conducted to determine the effect of the density and height on the shore over shell-length, shell-height and shell-thickness. A twoway ANOVA and a least-squared regression was used to determine whether the shell-sizes differ between varying densities and shore heights. Intertidal gastropod density was found to be the dominant factor in determining basal shell length (ANOVA, P < 0.001) and shell height (ANOVA P < 0.05) changes. Thus, at low population densities the shells are larger and taller. The height on the shore did not influence the shell-size of N. biradiata (ANOVA, P > 0.30).
publisher Iniversidad Autónoma de Baja California
publishDate 2002
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/228
_version_ 1715723944947875840

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