By Geoffrey A. Boxshall, Danielle Defaye
Sea lice are critical pests of commercially farmed fish and this booklet offers the 1st targeted evaluate in their biology and latest tools of keep watch over. It offers comprehensively with either the natural and utilized points of sea lice biology and covers a variety of issues to make it helpful to practitioners and researchers alike.
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Advances in Marine Biology was once first released in 1963 below the founding editorship of Sir Frederick S. Russell, FRS. Now edited by way of D. W. Sims (Marine organic organization Laboratory, Plymouth, UK), with an the world over well known Editorial Board, the serial publishes in-depth and updated studies on quite a lot of themes to be able to attract postgraduates and researchers in marine biology, fisheries technological know-how, ecology, zoology, and organic oceanography.
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Additional info for Pathogens Of Wild And Farmed Fish: Sea Lice (Ellis Horwood Series in Aquaculture and Fisheries Support)
1991) The developmental stages of Lepeophtheirus salmonis (Krøyer, 1937) (Copepoda: Caligidae). Can. J. Zool. 29 1571–1593. Kabata, Z. (1972) Developmental stages of Caligus clemensi (Copepoda: Caligidae). J. Fish. Res. Board Canada 29 1571–1593. G. (1963) Life history of the caligid copepod Lepeophtheirus dissimulatus Wilson, 1905 (Crustacea: Caligoida). Pac. Sci. 17, 195–242. M. (1955) A new piscicola copepod belonging to the genus Caligus from Matusima Bay. Bull. Biogeogr. Soc. Japan 16 135–140.
From this stage onwards, the black pigment found in the free-swimming stages disappears, but brown pigment is distributed widely throughout the cephalothorax. An area around the eyes is without pigment in this and all following stages. Furthermore, brown pigment is concentrated in bands posteriorly in the cephalothorax and in the urosome. A new accessory seta has developed on the medial surface of the distal segment of the antenna, close to the base of the terminal claw (Fig. 4d). This seta is not mentioned by Johnson and Albright (1991), but the antenna of chalimus II of Lepeophtheirus pectoralis (Müller) carries two small setae and a small conical process on its apex (Boxshall 1974).
The larva has a shape similar to the adult except for the urosome segments (Fig. 6c). The urosome has distinct segments. The genital complex has ovoid lateral margins which diverge posteriorly. There is a posterolateral and ventral extension of the complex representing the fifth leg with four setae, and cuticular folds are present on the anterolateral margins. Brown pigment is scattered all over the larva, except on the posterior part of the abdomen and the caudal rami. The pigment may be concentrated along suture lines in the cephalothorax and laterally in the genital complex.