Abstract The invasion of non-native species into an ecosystem can markedly alter the structure and functioning system. Yet, we have limited knowledge factors that determine success. Behavioural interactions been suggested as critical determinants success in animals, but exact mechanisms are less well known. We investigated if density-dependent behavioural could facilitated shrimp Palaemon elega...

During the Spanish colonial era, ships frequently transported mercury across Atlantic to New World be used in gold mining. As many of those eventually sank, shipwrecks may represent a local source contamination marine environment. In this context, evaluating coastal sediments and magnification food webs is crucial for understanding dynamics estimating exposure life locations where occurred. Thi...

Stages of merogony of a coccidian parasite were commonly observed during histological examination of the digestive tract of 7 crustacean species from Galician coastal waters. Study of the fine structure of these merogonial stages by transmission electron microscopy revealed the presence of a typical apicomplexan apical complex. Newly hatched Sepia officinalis obtained from egg masses, cultured ...

The geographic distributions of mercury-tolerant allozyme genotypes of the enzyme phosphoglucomutase in the shrimp Palaemon elegans and the enzyme phosphoglucose isomerase in the marine gastropod Monodonta turbinata were compared in a mercury-polluted site versus several unpolluted sites on the Israeli coast of the Mediterranean sea. We conclude that in both phosphoglucomutase and phosphoglucos...

Antennular chemoreception in aquatic decapods is well studied via the recording of single chemoreceptor neuron activity in the antennule, but global responses of the antennule (or antennae in insects) by electroantennography (EAG) has so far been mainly restricted to aerial conditions. We present here a well-established underwater EAG method to record the global antennule activity in the marine...

Transparency is an effective form of camouflage, but it must be present throughout the entire volume of an animal to succeed. Certain environmental stressors may cause physiological responses that increase internal light scattering, making tissue less transparent and more conspicuous to predators. We tested this in the transparent grass shrimp, Palaemonetes pugio, which is found in shallow estu...