Gamidactylus hoplius sp. n. (COPEPODA, POECILOSTOMATOIDA, VAIGAMIDAE) DAS FOSSAS NASAIS DE Hoplias malabaricus (BLOCH, 1794) (CHARACIFORMES, ERYTHRYNIDAE) DA AMAZÔNIA BRASILEIRA

Abstract

RESUMO -Gamidactylus hoplius sp, n. foi coletada nas fossas nasais de Hoplias maiabaricus.A nova espécie é semelhante a Gamidactylus jaraquensis e a Gamidactylus bryconis, por possuir antena com uma garra terminal e um espinho móvel subterminal no terceiro segmento, além de um par de fortes retroestiletes laterais móveis, no primeiro somito toracico. Difere das duas espécies conhecidas na forma e posição dos retroestiletes e na ornamentação das pernas. ABSTRACT -Gamidactylus hoplius sp. n. was collected from nasal fossae of Hoplias maiabaricus. The new species resembles Gamidactylus jaraquensis and Gamidactylus bryconis in having antennae with moveable spine distally on the third segment and terminal claw, and a pair of strong moveable lateral retrostylets on the first thoracic somite. The new species can be distinguished from its two congeners by the shape and position of the retrostylets and by the armature of the legs.

Parasitism By Gussevia asota In Gills Of Juveniles Of Astronotus ocellatus Cultured In The Peruvian Amazon

“…Due to its zootechnical characteristics, the A. ocellatus is considered a species with great potential for management in controlled environments aiming human nutrition and ornamental purposes. However, to allow the breeding to become entirely feasible, it turns out the necessity to solve the problem of diseases and parasites upsurge affecting this species in controlled environments, as a consequence of intensive farming under inadequate management (Varella and Malta 1995). Therefore, with the gradual increase of intensive and semi-intensive fish farming in the Peruvian Amazon, there is a need for constant monitoring of the fish for the diagnosis and timely control of infestations by monogeneans.…”

Gamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of serrasalmid fishes from the Três Marias Reservoir, Upper São Francisco River, Minas Gerais State, Brazil

“…Later, Thatcher and Boeger (1984a, b, c) described three other genera and species of this family, namely: Gamidactylus jaraquensis, Gamispatulus schizodontis and Gamispinus diabolicus, respectively. Subsequently, Gamidactylus bryconis was described from Brycon pellegrini Holly, 1929 = B. amazonicus (Spix et Agassiz, 1829) and B. melanopterus (Cope, 1872) by Varella (1995) and Gamidactylus hoplius from Hoplias malabaricus (Bloch, 1794) by Varella and Malta (1996). All of these species were found in the Amazon River Basin.…”

Morfologia dos estágios de Náuplios e Copepodito i de Perulernaea gamitanae thatcher & paredes, 1985 (Crustacea: Cyclopoida: Lernaeidae), parasita do Tambaqui Colossoma macropomum (cuvier, 1818), (Osteichthyes: Characidae), cultivados em laboratório(1)

“…Geralmente, somente a fêmea é parasita. Fixa-se ao hospedeiro, podendo ser encontrada em diversos locais do corpo, como: cavidade bucal, cavidade branquial, fossas nasais, nadadeiras e pele (Thatcher, 1991;Varella, 1992;1995;Malta, 1995a;1995b;1995c;1995d;Malta & Varella, 1996a;1996b).…”