Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico

Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico

The size and age composition was determined for pink abalone Haliotis corrugata and green abalone H. fulgens populations of Bahía Tortugas in the western coast of the Baja California Peninsula, Mexico, in October 1997. The biomass was estimated by means of a stratified random design using semiautono...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Gluyas-Millán, MG, Talavera-Maya, J
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2003
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/131
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:cienciasmarinas.com.mx:article-131
record_format ojs
spelling oai:cienciasmarinas.com.mx:article-1312019-04-29T18:37:30Z Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico Composición por tallas y edades de las poblaciones de abulón Haliotis fulgens y H. corrugatade la zona de Bahía Tortugas, Baja California Sur, México Gluyas-Millán, MG Talavera-Maya, J abalone Haliotis fulgens H. corrugata age size Bahía Tortugas Baja California Sur abulón Haliotis fulgens H. corrugata tallas edad Bahía Tortugas Baja California Sur The size and age composition was determined for pink abalone Haliotis corrugata and green abalone H. fulgens populations of Bahía Tortugas in the western coast of the Baja California Peninsula, Mexico, in October 1997. The biomass was estimated by means of a stratified random design using semiautonomous Hooka diving. The abalones were collected from 1 to 18 m of depth with a 10-m2 sampling unit. All shell lengths were measured and a subsample was taken to measure shell length, to weigh, to indentify sex and maturity stage and to collect the shells to determine the age in the rings of the spire. The size interval of the population accessible of H. corrugata was 55 to 180 mm for individuals 2+ to 16+ years old, with a mean length of 135.8 mm and mean age of 6.6 years. For H. fulgens, organism sizes ranged from 57 to 206 mm for individuals 1+ to 20+ years old, with a mean length of 154 mm and mean age of 5 years. Possible causes are discussed regading the difference in recruitment between H. fulgens and H. corrugata, the decrease of the oldest year class in both species, and the earlier spawning of H. corrugata to the light of the status of the resource and of the environmental conditions that prevailed during El Niño 1997-98. Se estimó la biomasa del abulón amarillo Haliotis corrugata y abulón azul H. fulgens, y se determinó su composición por tallas y edades para la zona de Bahía Tortugas, en la costa occidental de la Península de Baja California en octubre de 1997. Se usó un muestreo al azar estratificado. Por medio de buceo semiautónomo tipo Hooka se colectaron abulones entre 1 y 18 m de profundidad con una unidad muestral de 10 m2. Los abulones se midieron y se tomó una submuestra para medir longitud y peso, determinar el sexo y el estadio de madurez, y colectar las conchas para determinar la edad en los anillos de la espira. Los promedios de la talla y la edad de la población accesible de H. corrugata fueron 135.8 mm y 6.6 años, y los intervalos de tallas y edades encontrados fueron de 55 a 180 mm en individuos de 2+ a 16+ años. Para H. fulgens los promedios fueron 154.1 mm y 5 años, con un intervalo de tallas de 57 a 206 mm en individuos de 1+ a 20+ años de edad. Se discuten las posibles causas de la diferencia en reclutamiento entre el abulón azul y el abulón amarillo, la disminución de grupos de edad respecto a años anteriores, y el adelanto del desove de H. corrugata a la luz del estatus del recurso y de las condiciones ambientales que prevalecieron durante de El Niño 1997-98. Iniversidad Autónoma de Baja California 2003-03-06 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/131 10.7773/cm.v29i1.131 Ciencias Marinas; Vol. 29 No. 1 (2003); 89-101 Ciencias Marinas; Vol. 29 Núm. 1 (2003); 89-101 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/131/108
institution Ciencias Marinas
collection OJS
language eng
format Online
author Gluyas-Millán, MG
Talavera-Maya, J
spellingShingle Gluyas-Millán, MG
Talavera-Maya, J
Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico
author_facet Gluyas-Millán, MG
Talavera-Maya, J
author_sort Gluyas-Millán, MG
title Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico
title_short Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico
title_full Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico
title_fullStr Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico
title_full_unstemmed Size and age composition of the populations of abalone Haliotis fulgens and H. corrugata of Bahía Tortugas, Baja California Sur, Mexico
title_sort size and age composition of the populations of abalone haliotis fulgens and h. corrugata of bahía tortugas, baja california sur, mexico
description The size and age composition was determined for pink abalone Haliotis corrugata and green abalone H. fulgens populations of Bahía Tortugas in the western coast of the Baja California Peninsula, Mexico, in October 1997. The biomass was estimated by means of a stratified random design using semiautonomous Hooka diving. The abalones were collected from 1 to 18 m of depth with a 10-m2 sampling unit. All shell lengths were measured and a subsample was taken to measure shell length, to weigh, to indentify sex and maturity stage and to collect the shells to determine the age in the rings of the spire. The size interval of the population accessible of H. corrugata was 55 to 180 mm for individuals 2+ to 16+ years old, with a mean length of 135.8 mm and mean age of 6.6 years. For H. fulgens, organism sizes ranged from 57 to 206 mm for individuals 1+ to 20+ years old, with a mean length of 154 mm and mean age of 5 years. Possible causes are discussed regading the difference in recruitment between H. fulgens and H. corrugata, the decrease of the oldest year class in both species, and the earlier spawning of H. corrugata to the light of the status of the resource and of the environmental conditions that prevailed during El Niño 1997-98.
publisher Iniversidad Autónoma de Baja California
publishDate 2003
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/131
_version_ 1715723925152858112

Ejemplares similares