Fishery of oceanic and coastal sharks in Colima, Jalisco and Michoacán. Shark fishery is one of the most important activities in the Mexican Pacific coast, nevertheless, there is few data available about the specific captures done by the fleet along the coast. This study describes fishery biology aspects of the shark species catched by the semi-industrial long-line fleet of Manzanillo. Monthly samplings were made on board of these vessels during an annual period from April 2006 to April 2007. Captured species composition (n=1 962 organisms) was represented by nine species. The one that sustains this fishery was Carcharhinus falciformis (88.12%), followed by Prionace glauca (8.21%). Low frequency species were represented by Sphyrna zygaena (1.78%), Alopias pelagicus (0.82%), Carcharhinus longimanus (0.45%). Furthermore, rare species were Alopias superciliosus (0.35%), Carcharhinus leucas (0.1%), Carcharhinus limbatus (0.1%) and Isurus oxyrinchus (0.05%). Fishery activity affected principally (60-92.70%) young males of C. falciformis, S. zygaena, C. longimanus and I. oxyrinchus; adult males (56-75%) of A. pelagicus, A. superciliosus, and C. limbatus; for P. glauca there were primarily female adults. For all the species found, females showed the bigger sizes when compared to males (with the exception of S. zygaena, that showed sexual dimorphism). Considering the lineal regressions made between precaudal length and total length, and, fork length and total length for C. falciformis, P. glauca, S. zygaena and A. pelagicus, the determination coefficients (r 2 ) showed that both lengths can be useful to obtain the total length of fish with some damage or absence of its caudal fin. The estimated fecundity for C. falciformis was of 3-7 offspring/female of 30-45cm LT (average of 40.57+2.03cm LT); and for P. glauca 5-52offspring/female of 5-18.6cm LT (average of 11.61±0.21cm LT). In the case of C. longimanus only one female was captured with a total of eight embryos, with an average of 45cm LT each; for this reason we assumed that the fishery areas do not coincide with the nursery oness for this species. According to the information obtained, we concluded that C. falciformis has a concurrent cycle and P. glauca a consecutive biannual one. Rev. Biol. Trop. 59 (2): 655-667. Epub 2011 June 01.

El estudio antropológico de los osarios megalíticos se ve frecuentemente obstaculizado por la excesiva fragmentación y desconexión anatómica de los restos óseos, lo cual supone un impedimento a la hora de realizar caracterizaciones poblacionales fiables. Por esta razón, la dentición se presenta como una fuente de estudio viable debido a una mejor conservación frente a otros elementos esqueléticos, ofreciendo además información valiosa acerca de los modos de vida de poblaciones antiguas. Los datos obtenidos en el dolmen de La Cabaña reflejan patrones dietarios propios de sociedades incipientemente agrícolas, con cierto consumo de alimentos cariogénicos, pero también sugieren el aprovechamiento de recursos silvestres y ganaderos. Por otro lado, no se han detectado diferencias significativas entre dentición permanente y decidua, lo que sugiere hábitos de consumo similares entre ambos grupos de edad.