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The article discusses the invasive round goby Apollonia melanostoma Trematodes. Four species comprise this genus in North American waters. N. umbellus is the sole species that has been described to parasitize fishes in Lake Erie of the Great Lakes. The metacercariae of N. umbellus are located in the muscles of relatively small-sized fishes. The skin, fins, gills, muscles, brain, eyes, gut, liver, spleen, kidneys, body cavity, and mesentery were examined for metazoan parasites. The metacercariae were first isolated from cysts. Parasite

Length and weight descriptive statistics are reported for 29 demersal fish species caught off the Madeira archipelago during three yearly surveys (1997, 2004 and 2005) using bottom long-lines from depths of 25–1150 m. Weight–length relationships were estimated for 18 of these species. The parameter b ranged between 2.737 in Polyprion americanus and 3.674 in Benthodesmus simonyi. Additionally, in 11 species, parameter a was calculated setting b = 3. To the authors’ knowledge all weight–length relationships presented herein are recorded for the first time from the Madeira area, and in the cases of Deania profundorum, Muraena helena and B. simonyi, are the first references worldwide. [ABSTRACT FROM AUTHOR]