| digenean larvae parasitizing cerastoderma edule (bivalvia) and nassarius reticulatus (gastropoda) from ria de aveiro, portugal. | this work reviews the significant community of digenean trematodes observed infecting the edible cockle, cerastoderma edule, and the snail nassarius reticulatus in the channel of s. jacinto, ria de aveiro estuary, portugal. the digenea observed comprise 15 species, belonging to the families bucephallidae (1), echinostomatidae (4), gymnophallidae (3), lepocreadiidae (1), microphallidae (1), monorchiidae (1), renicolidae (1), strigeidae, (1), and zoogonidae (2). the species were studied by light m ... | 2006 | 16729689 |
| assessment of inshore/offshore tributyltin pollution gradients in the northwest portugal continental shelf using nassarius reticulatus as a bioindicator. | imposex and organotin tissue contamination were assessed in nassarius reticulatus (l.) populations in the northwest portuguese continental shelf between 2002 and 2005 over an area of 735 km2, involving 366 sampling sites. the objective was to evaluate the dispersion of tributyltin (tbt) from inshore sources inside the ria de aveiro estuary into the adjacent deeper sea and to assess endocrine disruption in the netted whelk n. reticulatus, using imposex as a biomarker. the highest levels of tbt ti ... | 2006 | 17220091 |
| integrative assessment of organotin contamination in a southern european estuarine system (ria de aveiro, nw portugal): tracking temporal trends in order to evaluate the effectiveness of the eu ban. | organotin (ot) compounds have been used as biocide agents in antifouling paints since the mid 1960s and are now ubiquitous in the marine environment. due to their high toxicity to non-target species they were banned from antifouling paints in the european union in 2003 (2002/62/ec directive). the aim of the present work is to assess any obvious decline of the ot environmental levels at ria de aveiro (nw portugal) after the ban. the organotins - monobutyltin (mbt), dibutyltin (dbt), tributyltin ( ... | 2007 | 17727897 |
| cercaria sevillana n sp, a new cercaria (digenea: microphallidae) from nassarius reticulatus (l) (mollusca: prosobranchia) in portugal. | cercaria sevillana n. sp. (digenea: microphallidae) was discovered infecting the gonads and digestive gland of the prosobranch nassarius reticulatus (l.) (nassariidae) collected from the ria de aveiro, portugal. cercariae were obtained by natural emission and were studied under a differential interference contrast microscope and scanning electron microscope (sem). c. sevillana n. sp. is identical to the cercaria found by dolgikh (1965) in the same mollusc host from the black sea, but erroneously ... | 2002 | 12510162 |