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The influence of temperature and salinity on the duration of embryonic developm...
Maranhão, Paulo; Marques, João CarlosThe effects of salinity and temperature on the duration of embryonic development, fecundity and growth of the amphipod Echinogammarus marinus Leach from the Mondego estuary (Portugal) were studied in laboratory experiments. Combinations of three temperatures (10, 15 and 20 °C) and four salinities (10, 15, 20 and 25 [per mille sign]) were used. The duration of embryonic development was 33 ± 0.7 d (mean Â...
Modelling the effects of salinity variation on Echinogammarus marinus Leach (Am...
Martins, Irene; Maranhão, Paulo; Marques, João CarlosEchinogammarus marinus (Amphipoda, Gammaridae) is the most abundant amphipod species in the intertidal rocky habitats of the Mondego estuary and it seems to constitute an important prey for upper trophic levels. The aim of the present model was to assess the impacts of salinity variations on the abundance and biomass of E. marinus. For model purposes, the size structure of the population was divided in four dif...
The influence of environmental factors on the population dynamics, reproductive...
Maranhão, Paulo; Bengala, Nuno; Pardal, Miguel; Marques, João CarlosThe population density of Echinogammarus marinusin the Mondego estuary changed throughout the year, with a maximum during spring. The lowest densities were found in the north arm of the estuary, and the highest ones in the inner areas of the south arm. Higher densities appeared associated with the presence of muddy deposits under Fucus vesiculosus (Phaeophyta) and also with the presence of green macroalgae biom...
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