Preliminary observations indicated that the shrimp Crangon crangon (L.) appeared to be affected by the level of the ambient noise expressed as sound pressure. The significance of ~ t s metabolic response was studied by comparing its ammonia excretion rate under usual laboratory conditions E (= +25 dB pbar-l) to its rate under sound-proof conditions C (= -4 dB pbar-l). The relationship between t...

A new species of portunid crab (Brachyura: Portunidae) from southern Madagascar and central Philippines is described. Monomia calla sp. nov. is most similar in morphology to M. lecromi (Moosa, 1996) from the Chesterfield Islands in the southwestern Pacific Ocean, and M. rubromarginata (Lanchester, 1900) from the South China Sea, Singapore, Malay Archipelago and the northern half of Australia. T...

Alpheus echiurophilus sp. nov. (Crustacea: Decapoda: Caridea: Alpheidae) is described based on material from Japan (Ryukyu Islands) and Vietnam (Nha Trang Bay); an additional, morphologically slightly different specimen from Madagascar (Nosy-Bé) is preliminarily referred to A. cf. echiurophilus sp. nov., awaiting collection of additional material and/or genetic comparison. All specimens of the ...

Invasive species are a key driver of global environmental change, with frequently strong negative consequences for native biodiversity and ecosystem processes. Understanding competitive interactions between invaders and functionally similar native species provides an important benchmark for predicting the consequences of invasion. However, even though having a broad dietary niche is widely cons...

a Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, 1090 GT Amsterdam, The Netherlands b Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK c Department of Botany and Zoology, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa d Queensland Centre for Biodiversity, Queensland Museum, Brisbane, Qld. 4101, Australia ...

The brachyuran crabs are iteroparous species which present a high diversification of reproduction patterns, which may have evolved as a species-specific response to environmental conditions. Tropical species commonly present a year-round reproduction due to stable environment conditions. Goniopsis cruentata is a crab species widely distributed along the Western Atlantic, inhabiting practically ...

Two species of the Acanthephyridae, Acanthephyra brevicarinata Hanamura, 1984, and A. brevirostris Smith, 1885, are reported for the Pacific coast of Mexico. The number of known localities for A. brevicarinata, a species endemic to the eastern Pacific, is increased from 24 to 70 and the number of specimens on records from 160 to 363. New distribution limits are provided for this species, from 2...