Spatial structure of the spider crab, Maja brachydactyla population: Evidence of metapopulation structure

Abstract

The Ceboruco stratovolcano (2,280 m.a.s.l.) is located in Nayarit, Mexico, at the western end of the Mexican volcanic belt, near several population centers and by the side of a strategic highway. During the last 1,000 years it has had, on the average, one eruption every 125 years. It last eruptive activity began in 1870, and during the following 5 years it presented superficial activity including vapor emissions, ash falls, and rhyodacitic lava flows along the southeast side. A data set consisting of 139 low-frequency volcanic-type earthquakes, recorded from March 2003 to July 2008 at the CEBN triaxial short period digital station on the southwestern side of the volcano, was classified according to waveform and spectral characteristics into four families: short duration, extended coda, bobbin, and modulated amplitude. Approximate hypocentral locations indicate that there is no particular location for events of any family, but rather that all events occur at different points within the volcano. The presence of ongoing volcanic-earthquake activity together with the ongoing vapor emissions indicate that the Ceboruco volcano continues to be active, and the higher occurrence rates of short-duration events, as compared with those for the other families, could indicate an increase in the stress in the volcanic edifice. This apparent stress increase, together with the fact that the last eruption occurred 143 years ago, tell us that the Ceboruco may be approaching a critical state, and may represent a hazard to the surrounding communities and economic activities. " 2013 Springer-Verlag Berlin Heidelberg.",,,,,,"10.1007/s00445-013-0755-9",,,"http://hdl.handle.net/20.500.12104/44648","http://www.scopus.com/inward/record.url?eid=2-s2.0-84883609943&partnerID=40&md5=36690c1c607bb363a2400bac84931036",,,,,,"10",,"Bulletin of Volcanology",,"1

12",,"75",,"Scopus

WOS",,,,,,"Ceboruco Volcano; Low-frequency earthquakes; Triaxial short period data; Volcanic hazard",,,,,,"Some insights about the activity of the Ceboruco Volcano (Nayarit, Mexico) from recent seismic low-frequency activity",,"Article" "46461","123456789/35008",,,"López Méndez, Graciela",,"2000",,,,,,,,,,"0187-7674",,"http://hdl.handle.net/20.500.12104/44682",,"Español",,,,"72",,"Confines de relaciones internacionales y ciencia política",,"50-52",,"12",,"CLASE",,,,,,,,"Condiciones económicas",,"Indicadores del empresario",,,,"journalArticle", "46505","123456789/35008",,,"López Méndez, Graciela",,"1997",,,,,,,,,,"0187-7674",,"http://hdl.handle.net/20.500.12104/44726",,"Español",,,,"57",,"Confines de relaciones internacionales y ciencia política",,"40-42",,"10",,"CLASE",,,,,,,,"Condiciones económicas",,"Indicadores del empresario",,,,"journalArticle", "46436","123456789/35008",,"Robles-Silva, L., Laboratorio de Salud Pública, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara (U de G), México.; Mercado-Martínez, F.J., Laboratorio de Salud Pública, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara (U de G), México.; Ramos-Herrera, I.M., Laboratorio de Salud Pública, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara (U de G), México.; Alcantara-Hernández, E., Laboratorio de Salud Pública, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara (U de G), México.; Moreno-Leal, N.C., Laboratorio de Salud Pública, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara (U de G), México.",,"Robles-Silva, L.

Mercado-Martinez, F.J.

Ramos-Herrera, I.M.

Alcantara-Hernandez, E.

Moreno-Leal, N.C.",,"1995",,"This article examines the relationship between sociodemographic factors and sources of support in non-insulin dependent diabetes mellitus patients living in a socially deprived area of Guadalajara, Mexico. A total of 121 diabetic subjects and the same number of caretakers, spouses and children, participated in the study. Findings show that some variables of diabetic individuals are associated with caretakers' age, sex and kinship. Moreover, sex distribution of children and family composition were also associated with sources of support. No association was found between disease characteristics and those of caretakers. The impact of these results on health services programs is discussed.",,,,,,,,,"http://hdl.handle.net/20.500.12104/44657","http://www.scopus.com/inward/record.url?eid=2-s2.0-0029303758&partnerID=40&md5=66faef736dc28b019a3b9b31e348f826",,,,,,"3",,"Salud Publica de Mexico",,"187

196",,"37",,"Scopus

WOS",,,,,,,,,,,,"Sources of support of individuals with diabetes in a deprived area of Guadalajara, Mexico [Las fuentes de apoyo de los individuos con diabetes en una zona marginal de Guadalajara, México.]",,"Article" "46428","123456789/35008",,,"López Méndez, Graciela",,"1999",,,,,,,,,,"0187-7674",,"http://hdl.handle.net/20.500.12104/44649",,"Español",,,,"68",,"Confines de relaciones internacionales y ciencia política",,"48-50",,"12",,"CLASE",,,,,,,,"Condiciones económicas",,"Indicadores del empresario",,,,"journalArticle", "46444","123456789/35008",,"Corgos, A., Grupo de Recursos Marinos y Pesquerías, Facultade de Ciencias, Universidade da Coruña, Rua da Fraga 10, E-15008 A Coruña, Spain, Departamento de Estudios para el Desarrollo Sustentable de Zonas Costeras, Universidad de Guadalajara, V. Gómez Farías #82, E-48980 San Patricio-Melaque, Jalisco, Mexico; Bernardez, C., Grupo de Recursos Marinos y Pesquerías, Facultade de Ciencias, Universidade da Coruña, Rua da Fraga 10, E-15008 A Coruña, Spain; Sampedro, P., Instituto Español de Oceanografía, Centro Oceanográfico de A Coruña, Paseo Marítimo Alcalde Francisco Vázquez, N 10 E-15001 A Coruña, Spain; Ver simo, P., Grupo de Recursos Marinos y Pesquerías, Facultade de Ciencias, Universidade da Coruña, Rua da Fraga 10, E-15008 A Coruña, Spain; Freire, J., Grupo de Recursos Marinos y Pesquerías, Facultade de Ciencias, Universidade da Coruña, Rua da Fraga 10, E-15008 A Coruña, Spain",,"Corgos, A.

Bernardez, C.

Sampedro, P.

Verisimo, P.

Freire, J.",,"2011",,"Distribution and spatial population structure of the spider crab, Maja brachydactyla, in the Ría de A Coruña (NW Spain) and adjacent coastal area was analysed. Sampling was done with experimental traps placed in three shallow bottom sampling stations and the central channel of the Ría, from December 1997 to November 1999. Crabs were tagged to study their movements on a small scale (1-10. km). Mean catches were substantially higher in the inner Ría station (Bastiagueiro) and were significantly higher in sandy substrates. Crabs inhabiting rocky bottoms moved to sandy bottoms from summer to autumn. Two local populations comprising mainly juveniles were identified -one located in Bastiagueiro and the other in Canide. There was no evidence of any major exchange between the juveniles of the two populations nor were juveniles observed to move towards deeper zones. Most of these juveniles reached maturity in summer and migrated to deeper waters. Adult catches and the recaptured specimens from both the experimental sampling and the commercial fishery indicate that the local Bastiagueiro population contributes a much greater number of individuals to the adult crab population in deep waters than does the Canide population. The spatial structure of the population of M. brachydactyla in the Ría de A Coruña may be defined as a part of a postlarval metapopulation made up of two shallow water local juvenile crab populations that migrate to deeper waters after attaining maturity. A pool of adults (and indirectly of larvae) from several local populations is formed in deeper waters. There is strong evidence that local populations are linked by larval dispersal. " 2011 Elsevier B.V.