Sentence examples for lice fish from inspiring English sources

To rid salmon of the lice, fish farmers spike their feed with a strong pesticide called emamectin benzoate, which when administered to rats and dogs causes tremors, spinal deterioration and muscle atrophy.

Beside vertebrates (bats and lampreys), in invertebrates hematophagous parasites are found amongst platyhelminths (flukes), nematodes (hookworms), annelids (leeches), molluscs and in arthropods with more than 14,000 hematophagous species, ranging from acarines (ticks) to insects (mosquitoes, sandflies, bugs, fleas, horseflies, midges, moths) and crustaceans (sea lice, fish lice) [ 1, 2].

Fish louse, also called carp louse, plural fish lice or carp lice, any member of the crustacean subclass Branchiura, a group of parasites of migratory marine and freshwater fishes.

Crustacean lice include fish lice (subclass Branchiura), copepod fish parasites (subclass Copepoda), and amphipod and isopod fish parasites (class Malacostraca).

Arithmetic mean and median abundance (number of lice per fish) and prevalence (number of fish with lice) values were calculated for each stage group of L. salmonis to characterize the level of infestation at each site.

The maximum infection intensity of C. clemensi was highest downstream of farms in 2007 (28 lice per fish) compared to upstream sites (16 lice per fish), and equal throughout the region in 2008 (9 lice per fish).

However, with the exception of 2006, mean abundance in all years dropped to below four lice per fish within a month of treatment initiation.

At 14.4 and 10.7 lice per fish respectively, the mean pre-treatment abundance of L. salmonis mobiles in 2003 and 2004 was approximately two to three times higher than in 2002, 2005 and 2006.

At 22 dpi the number of lice per fish ranged from 4 to 20 with mean 12.2 ± 1.8.

Infection intensity (lice per fish) is also reported in Figure  1 and Additional file 2: Table S1, and follows the same trend as the infection density.

Caligid copepods, also called sea lice, are fish ectoparasites, some species of which cause significant problems in the mariculture of salmon, where the annual cost of infection is in excess of €300 million globally.