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Unexpected high genetic diversity at the extreme Northern geographic limit of T...
Almada, V. C.; Almada, F.; Francisco, S. M.; Castilho, Rita; Robalo, J. I.The longspined bullhead (Taurulus bubalis, Euphrasen 1786) belongs to the family Cottidae and is a rocky shore species that inhabits the intertidal zones of the Eastern Atlantic since Iceland, southward to Portugal and also the North Sea and Baltic, northward to the Gulf of Finland, with some occurrences in the northern Mediterranean coasts eastward to the Gulf of Genoa. We analysed the phylogeographic patterns...
Genetic evidence fails to discriminate between Macroramphosus gracilis Lowe 183...
Robalo, J. I.; Sousa-Santos, C.; Cabral, H.; Castilho, Rita; Almada, V. C.Fish belonging to the genus Macroramphosus are distributed throughout the Atlantic, Indian and PaciWc oceans. Some authors consider this genus monotypic, Macroramphosus scolopax being the only valid species. Other authors consider (based on several morphological and ecological characters) that another species (Macroramphosus gracilis) exists and occurs frequently in sympatry with the Wrst one. Intermediat...
Social modulation of sex steroid concentrations in the urine of male cichlid fi...
Oliveira, R. F.; Almada, V. C.; Canario, Adelino V. M.The relationship between urinary concentrations (free + sulfates + glucuronides) of the steroids testosterone (T), 11-ketotestosterone (11KT), 17α, 20ß-dihydroxy-4-preg- nen-3-one (17,20ß-P) and 17a,20a-dihydroxy-4-preg- nen-3-one (17,20α-P), and the social behavior of males of the cichlid fish Oreochromis mossambicus was inves- tigated. After 8 days of isolation none of the steroids were good predictors of soci...
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