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The stone moroko (Pseudorasbora parva), also known as the topmouth gudgeon, [1] is a fish belonging to the Cyprinidae family, native to Asia, but introduced and now considered an invasive species in Europe and North America. The fish's size is rarely above 8 cm and usually 2 to 7.5 cm (0.79 to 2.95 in) long.
Sphaerothecum destruens (the rosette agent) is a parasite of fish. [1] [2] It was first discovered in the United States in association with invasive species including topmouth gudgeon, but was found to be the causative agent of a disease in the UK affecting salmonid species such as Atlantic salmon and brown trout.
Gudgeon is the common name for a miniature barbel and a number of small freshwater fish of the families Butidae, Cyprinidae, Eleotridae or Ptereleotridae. Most gudgeons are elongate, bottom-dwelling fish , many of which live in rapids and other fast moving waters; however, many can be found in still waters.
The list was first updated in 2017 [3] and comprised 49 species. Since the second update in 2019, [4] 66 species are listed as IAS of EU concern. Since the third update in 2022, [5] 88 species are listed as IAS of EU concern, although the final inclusion of three of these species has been deferred to 2024, and one to 2027. [citation needed]
This is an impartial (not implicitly biased to a single governing body, the BRFC) and comprehensive record list of 310 British record freshwater fish, past and present, involving 60 species/sub-species of fish caught using the traditional angling method of rod and line. Records include the angler, species, weight, date, venue, also referenced ...
A controlled study comparing six native fish species with the introduced (and invasive) eastern mosquitofish (Gambusia holbrooki) on consuming larvae of the common banded mosquito (Culex annulirostris) in Brisbane found that the empire gudgeon was as efficient at eating mosquito larvae as the eastern mosquitofish and is a good candidate for ...
Japanese knotweed is seen in flower. Yellowish-white flower spikes appear in August and September, making now the best time of year to identify and report occurrences of this invasive species.
certain Ophiostoma species which cause Dutch elm disease. Ophiostoma ulmi; Ophiostoma himal-ulmi; Ophiostoma novo-ulmi; Pseudogymnoascus destructans; Uredo rangelii; Suillus and Rhizopogon are considered invasive in parts of the Southern Hemisphere, as they promote Pinaceae tree invasion. [2]