21 research outputs found
Interpreting Intra-site Spatial Patterns in Seasonal Contexts: an Ethnoarchaeological Case Study from the Western Alps
Morphological and behavioral embryology and spontaneous diapause in the African killifish, Aphyosemion gardneri
Cell cycle regulation during development and dormancy in embryos of the annual killifish Austrofundulus limnaeus
Numerical simulation of cohesive sediment transport: intercomparison of several numerical models
Five different numerical models are used to reproduce estuarine cohesive sediment transport and intercomparisons are made of the resulting predictions. Comparison with test cases have shown that the numerical treatment of cohesive sediment is very sensitive to model parameters and formulations, and requires good calibration. Some of the specific processes that have been developed through the MAST.3-COSINUS European project are used here to improve the ability of numerical models to reproduce the sediment behaviour in real estuaries. Despite this progress, it is shown that numerical models results still have many limitations, and their results should always be interpreted with great care
Three dimensional numerical modelling of cohesive sediment transport processes in estuarine environments
SIGLEAvailable at INIST (FR), Document Supply Service, under shelf-number : 26165 C, issue : a.1996 n.12 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
The influence of temperature on the embryonic development of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes, Rivulidae)
The present study aims to provide data about the time required for Cynopoecilus melanotaenia kept at different temperatures to complete embryonic development. This information can be valuable for optimizing laboratory culture and facilitating future use of this species as a test organism in toxicity tests. Temperature effects on hatching rate are presented as well as information related to embryonic development stages. Eggs were observed daily, from start to finish of embryonic development. Thirteen developmental stages were described. Eggs were kept at two constant temperatures (20°C and 25°C) and at a variable ambient temperature (16-25°C - mean = 21°C, sd = 1.95), to determine developmental rate (velocity) at each temperature. A shorter incubation period was necessary to complete development at 25° ± 1°C. However, all embryos kept at this temperature hatched with morphological defects, which prevented their survival. No significant difference in developmental time period (p = 0.05) was observed at the 20°C and 16°-25°C (mean = 21°C, sd = 1.95) temperatures