Calibración de un modelo alométrico para evaluar la producción foliar de Zostera marina L.

In this paper a mathematical model to predict the foliage production of Z. marina es proposed. This model presents the foliage production expressed in dry weight, as function of length and width of the leaves. The calibration of the model was made with samples taken in two different levels of exposure in Bahía Falsa, San Quintín, Baja California, México. The high values of the determination coefficient and the small values of the standard errors of the fitting data as well as the parameters found by the regression, and the small values of the absolute and standard errors between the observed and calculated values, indicate that the model is adequate.En este trabajo se propone un modelo matemático para predecir la producción foliar de Z. marina, expresada como peso seco en función del largo y ancho de las hojas. La calibración del modelo se realizó con muestras colectadas a dos diferentes niveles de exposición, en Bahía Falsa, San Quintín, Baja California, México. Los elevados de los coeficientes de determinación, los bajos valores de los errores estándar, tanto de los ajustados como de los parámetros obtenidos y los bajos valores de los errores estándar y absoluto, entre los valores encontados y los calculados, indican que el modelo es adecuado

Delivery of zooplankton to the surf zone during strong internal tidal forcing and onshore winds in Baja California

Various physical mechanisms are implicated in the transport of zooplankton to the outer edge of the surf zone, which is the final barrier before reaching the adult habitat of many meroplanktonic organisms. To explore these physical mechanisms, we measured the abundance of zooplankton in the surf zone hourly for 3 consecutive days during strong internal tidal forcing while concurrently measuring winds, currents, and seawater temperature. Strong temperature changes in the water column that were associated with internal tidal bores, as well as onshore coastal winds, coincided with peaks in abundance of barnacle cyprids, gastropods, and bryozoan larvae in the surf zone. This study supports the hypothesis that both internal tidal bores and onshore winds can accumulate zooplankton nearshore, and that these transport mechanisms may act in concert

Structure and Composition of the Polychaete Community from Bahia San Quintin, Pacific Coast of Baja California, Mexico

Volume: 104Start Page: 75End Page: 9

Sexual life and dysfunction after maternal morbidity: a systematic review

Because there is a lack of knowledge on the long-term consequences of maternal morbidity/near miss episodes on women´s sexual life and function we conducted a systematic review with the purpose of identifying the available evidence on any sexual impairment associated with complications from pregnancy and childbirth