Helminths of Sebastes alutus (Pisces: Teleostei) from the northeastern Pacific

Abstract

Incidences and intensities of infection for 19 species of helminths recovered from Sebastes alutus are presented. Seven are regarded as new host records. Lecithophyllum anteroporum Margolis, 1958 is placed in synonymy with L. botryophorum (Olsson, 1868) Odhner, 1905.

Two new species of Acanthocotyle Monticelli, 1888 (Monogenea: Acanthocotylidae), parasites of two deep-sea skates (Elasmobranchii: Rajiformes) in the South-East Pacific

“…in N. maculata could be the result of a transfer of the parasite between fishes during capture. A similar reason was suggested to explain the presence of A. williamsi (as Pseudacanthocotyla williamsi ) in the teleost Sebastes alutus (Gilbert) (Scorpaeniformes) [32]. Surprisingly, this species was also recorded from the gills of another teleost fish, Reinhardtius hippoglossoides (Walbaum) (Pleuronectiformes) [33].…”

“…During 2016, three major contributions to the taxonomy of elasmobranchs were published [34–36]. Accordingly, hosts for Acanthocotyle are included not only in the Rajidae [32] but also in the Arhynchobatidae [34, 35]. The specificity of Acanthocotyle , at least at the family level, requires clarifying the systematics of the Rajiformes.…”

“…Regarding hosts of the Rajiformes, a search in the ISI Web of Sciences (1975–2018) and Scopus (1990–2018), using as search criteria “Rajidae”, “Rajiformes” and “parasites”, yielded 46 references (excluding records from freshwater Rajiformes) that include parasitological records for just 61 host species. The known species count of Rajiformes is 287 [36], and the geographical range of distribution of members of this order includes from tropical to polar seas, and from shallow to deep-waters in the Atlantic, Indian and Pacific Ocean [32] and only 14 species of Rajiformes have been recorded as host for members of Acanthocotyle . As stated in a previous study [40], Rajidae have particularly been neglected in terms of limited sampling effort when studying cestodes.…”

Nematode Parasites of Rockfish (Sebastes spp.) and Cod (Gadus spp.) from Waters near Kodiak Island Alaska, USA

“…Pacific rockfish, in particular, represent an important fishery resource in the northeast Pacific [8,9]. Although there are many studies that have specifically focused on rockfish [8], few quantitative studies of nematode parasites of rockfish [10,11] and cod are available in recent times and from one geographic location, and none are available from the southwestern Gulf of Alaska near Kodiak Island [1]. As environments change, parasite distribution or abundances will likely also change.…”

Copépodos Parásitos Del Pez Vermillon Sebastes Miniatus (Pisces: Scorpaenidae) en Las Costas De Baja California (Pacífico Noreste)

“…The Spearman rank correlation analyses showed that there were no significant relationships between abundance and Kabata (1990) and recently C. sebastidis female and male were described for the fish Sebastes oculatus by Castro & Gonzalez (2005). Clavella parva C. B. Wilson, 1912 has been found in Sebastes aleutinus (Jordan & Evermann, 1898), S. elongatus Ayres, 1859, S. bobcocki (Thompson, 1915) and S. caurinus Richardson, 1844 in the North Pacific (Sekerak & Arai, 1977), S. alutus (Gilbert, 1890) and S. auriculatus Girard, 1854 in British Columbia (Wilson, 1915;Sekerak & Arai, 1977), S. serranoides (Eigenmann & Eigenmann, 1890) in central California (Love et al, 1984), S. diploproa in British Columbia (Kabata, 1970), S. maliger in the North Pacific (Kabata, 1988) and S. melanops Girard, 1856 in Alaska (Wilson, 1915) Kabata, 1973 have been reported in 12 of the 65 Sebastes species recorded in this region (Love et al, 2002). It is important to mention that species of genus Lepeophtheirus have also been reported in other fish hosts and are very common in cultured fish (Johnson et al, 2004).…”