| antibacterial activity in four marine crustacean decapods. | a search for antibacterial activity in different body-parts of pandalus borealis (northern shrimp), pagurus bernhardus (hermit crab), hyas araneus (spider crab) and paralithodes camtschatica (king crab) was conducted. dried samples were extracted with 60% (v/v) acetonitrile, containing 0.1% (v/v) trifluoroacetic acid, and further extracted and concentrated on c18 cartridges. eluates from the solid phase extraction were tested for antibacterial, lysozyme and haemolytic activity. antibacterial act ... | 2002 | 12194450 |
| conservation in the first internal transcribed spacer region (its1) in hematodinium species infecting crustacean hosts found in the uk and newfoundland. | parasitic dinoflagellates in the genus hematodinium infect a number of decapod crustaceans in waters off the uk, including the norway lobster nephrops norvegicus and the edible crab cancer pagurus. this study investigated sequence variability in the first internal transcribed spacer (its1) region of the ribosomal rna complex of hematodinium spp. infecting n. norvegicus, c. pagurus, and pagurus bernhardus from 4 locations in the uk and from the hematodinium sp. infecting chionoecetes opilio from ... | 2007 | 17629120 |
| transition from sea to land: olfactory function and constraints in the terrestrial hermit crab coenobita clypeatus. | the ability to identify chemical cues in the environment is essential to most animals. apart from marine larval stages, anomuran land hermit crabs (coenobita) have evolved different degrees of terrestriality, and thus represent an excellent opportunity to investigate adaptations of the olfactory system needed for a successful transition from aquatic to terrestrial life. although superb processing capacities of the central olfactory system have been indicated in coenobita and their olfactory syst ... | 2012 | 22673356 |
| distribution of centrifugal neurons targeting the soma clusters of the olfactory midbrain among decapod crustaceans. | to determine the distribution of two systems of centrifugal neurons innervating the soma clusters of the olfactory midbrain across decapod crustaceans, brains of the following nine species comprising most infraorders were immunostained with antibodies against dopamine and the neuropeptides substance p and fmrfamide: macrobrachium rosenbergii, homarus americanus, cherax destructor, orconectes limosus, procambarus clarkii, astacus leptodactylus, carcinus maenas, eriocheir sinensis and pagurus bern ... | 1997 | 9106436 |
| the environmental impacts of three different queen scallop (aequipecten opercularis) fishing gears. | the negative impact of demersal fishing gears on the marine environment may be mitigated by utilizing less damaging fishing gears. within this context three queen scallop fishing gears were tested for their catch efficiencies and their environmental impact on benthos: a traditional 'newhaven' dredge, a new dredge design with a rubber lip instead of the traditional teeth as its main new design feature and an otter trawl. both, the new dredge and the otter trawl showed high catches and relatively ... | 2012 | 22119657 |
| levels of polybrominated diphenyl ether (pbde) flame retardants in animals representing different trophic levels of the north sea food web. | the levels of individual pbde congeners were investigated in the invertebrate species whelk (buccinum undatum), seastar (asterias rubens), and hermit crab (pagurus bernhardus), the gadoid fish species whiting (merlangius merlangus) and cod (gadus morhua), and the marine mammal species harbor seal (phoca vitulina) and harbor porpoise (phocoena phocoena). these species are all important representatives of different trophic levels of the north sea food web. all six major pbde congeners detected (bd ... | 2002 | 12380070 |
| seed predation by the shore crab carcinus maenas: a positive feedback preventing eelgrass recovery? | there is an increasing interest to restore the ecosystem services that eelgrass provides, after their continuous worldwide decline. most attempts to restore eelgrass using seeds are challenged by very high seed losses and the reasons for these losses are not all clear. we assess the impact of predation on seed loss and eelgrass establishment, and explore methods to decrease seed loss during restoration in the swedish northwest coast. in a laboratory study we identified three previously undescrib ... | 2016 | 27977802 |
| comparative brain architecture of the european shore crab carcinus maenas (brachyura) and the common hermit crab pagurus bernhardus (anomura) with notes on other marine hermit crabs. | the european shore crab carcinus maenas and the common hermit crab pagurus bernhardus are members of the sister taxa brachyura and anomura (together forming the taxon meiura) respectively. both species share similar coastal marine habitats and thus are confronted with similar environmental conditions. this study sets out to explore variations of general brain architecture of species that live in seemingly similar habitats but belong to different major malacostracan taxa and to understand possibl ... | 2012 | 22374330 |
| physiological responses of three crustacean species to infection by the dinoflagellate-like protist hematodinium (alveolata: syndinea). | this is the first study comparing physiological responses of three decapod species to infection by parasites of the genus hematodinium, which belongs to the dinoflagellate-like syndinea. responses varied profoundly between the crabs carcinus maenas and cancer pagurus (brachyura), but also differed to those of hermit crabs, pagurus bernhardus (anomura). osmoregulatory capacity was reduced significantly in hematodinium-infected c. maenas, haemolymph ph increased in parasitised c. pagurus and p. be ... | 2010 | 20600085 |
| hematodinium sp. (alveolata, syndinea) detected in marine decapod crustaceans from waters of denmark and greenland. | five decapod crustacean species were examined for presence of the parasitic dinoflagellate hematodinium spp. (alveolata, syndinea) by morphological methods (colour and pleopod methods) as well as by pcr and nested pcr with hematodinium-specific primers. nephrops norvegicus, pagurus bernhardus and liocarcinus depurator were sampled by trawling in danish waters and chionoecetes opilio and hyas araneus were sampled by trapping off the west coast of greenland. the existence of hematodinium has not p ... | 2010 | 21166315 |
| a preliminary health survey of the hermit crab, pagurus bernhardus, on the southwest coast of ireland. | during october and november of 2011 and 2012, 229 hermit crabs, pagurus bernhardus, were randomly collected from the intertidal shore at three locations along the southwest coast of ireland. this is the first survey to assess the health status of this crustacean in ireland. carapace length and the sex of each crab were recorded. crabs were screened for parasites by histology and the intensity and prevalence of infection was determined. crabs of varying carapace length were screened. the only par ... | 2015 | 25794493 |
| structural and functional characterization of haemocyanin from the anemone hermit crab dardanus calidus. | oxygen-binding to haemocyanin (hc) is generally an exothermic process, with overall enthalphy of oxygenation varying from species to species. a number of crustacean hcs showed a null or reduced enthalphy of oxygenation, among others, the anomuran pagurus bernhardus and paralithodes camtscaticae possess a completely temperature-independent oxygen-binding in a wide range of temperature and ph. functional analysis performed on purified native, hexameric and dodecameric hc forms of the anemone hermi ... | 2008 | 17984120 |