Excorallana delaneyi, N. Sp. (Crustacea: Isopoda: Excorallanidae) from the Northeastern Gulf of Mexico, with Observations on Adult Characters and Sexual Dimorphism in Related Species of Excorallana Stebbing, 1904

Stone, Ilya; Heard, Richard W.

doi:10.18785/grr.0802.11

Cited by 4 publications

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References 3 publications

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“…However, the first reports on E. berbicensis in freshwater fish were given in 1925 and 1936 by Van Name, who detected the parasite in the gills and tegument of L. grossidens from British Guiana. Later, in 1969, Monod reported the same corallanid species on gills of the shark N. brevirostris collected in freshwater areas of French Guiana, in the Amazon region (Stone & Head, 1989). Subsequently, the occurrence of E. berbicensis was reported in A. inermis of the Crustacean Collection of the National Institute of Amazonian Researches (Thatcher, 1995), probably originating from the state of Pará, in the eastern Amazon region, Brazil.…”

Section: Resultsmentioning

confidence: 95%

<b>Host-parasite interaction between crustaceans of six fish species from the Brazilian Amazon

Vasconcelos

Tavares‐Dias

2016

Acta Sci. Biol. Sci.

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ABSTRACT. Host-parasite interactions between crustaceans and six fish species (Psectrogaster falcata, Ageneiosus ucayalensis, Acestrorhynchus falcirostris, Hemiodus unimaculatus, Serrasalmus gibbus and Geophagus proximus) from a reservoir in eastern Amazon, northern Brazil, were investigated. Eight hundred and seventy-eight parasites belonging to three crustacean species, Excorallana berbicensis, Argulus chicomendesi and Ergasilus turucuyus, which parasitized the hosts' mouth, gills and tegument, were collected from 295 fish and examined. High infestation levels were caused by E. berbicensis on the body surface of the hosts. Excorallana berbicensis showed aggregate dispersion, except in S. gibbus, while E. turucuyus showed random dispersion in A. falcirostris. The host's sex did not influence infestation by E. berbicensis, and high parasitism failed to affect the body conditions of the fish. In the case of some hosts, rainfall rates, temperature, dissolved oxygen levels and water pH affected the prevalence and abundance of E. berbicensis, the dominant parasite species. Results revealed that the environment and life-style of the hosts were determining factors in infestations by parasites. Current assay is the first report on E. berbicensis for the six hosts, as well as on A. chicomendesi for G. proximus and P. falcata.Keywords: body condition, ectoparasites, environment, freshwater fish, infestation.Interação hospedeiro-parasite entre crustáceos de seis espécies de peixes da Amazônia brasileira ESUMO. O presente estudo investigou a fauna de crustáceos parasitos em Psectrogaster falcata, Ageneiosus ucayalensis, Acestrorhynchus falcirostris, Hemiodus unimaculatus, Serrasalmus gibbus e Geophagus proximus de um reservatório da Amazônia oriental, norte do Brasil, bem como as interações parasito-hospedeiro-ambiente. Foram coletados 878 parasitos pertencentes a três espécies de crustáceos, Excorallana berbicensis, Argulus chicomendesi e Ergasilus turucuyus, que infestaram a boca, brânquias e tegumento dos hospedeiros. Elevados níveis de infestação foram causados por E. berbicensis na superfície corporal dos hospedeiros. E. berbicensis mostrou dispersão agregada, exceto em S. gibbus, enquanto E. turucuyus teve dispersão randômica em A. falcirostris. O sexo dos hospedeiros não influenciou os níveis de infestação por E. berbicensis e o elevado parasitismo não afetou as condições corporais dos peixes. Para alguns hospedeiros, foram observadas correlações significativas da prevalência e abundância de E. berbicensis com a precipitação pluviométrica, temperatura, níveis de oxigênio dissolvido e pH da água. Os resultados indicaram que o ambiente e hábito de vida dos hospedeiros foram fatores determinantes nas infestações parasitárias encontradas. Esse é o primeiro relato de E. berbicensis para esses seis hospedeiros, A. chicomendesi para G. proximus e P. falcata e E. turucuyus para H. unimaculatus.Palavras-chave: condição corporal, ectoparasitos, ambiente, peixes de água doce, infestação.

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Section: Resultsmentioning

confidence: 95%

<b>Host-parasite interaction between crustaceans of six fish species from the Brazilian Amazon

Vasconcelos

Tavares‐Dias

2016

Acta Sci. Biol. Sci.

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“…Flabelliferan isopods have often been found in cavities and canals in sponges in the North Atlantic (ARNDT 1933;PEARSE 1932;DOUNAS & KOUKOURAS 1986;STONE & HEARD 1989). At the Faroe Islands both adults and juveniles of A. ventrosa were found in oscular cavities in 5. ponderosus.…”

Section: The Sponges As Foodmentioning

confidence: 99%

The fauna associated with outer shelf and upper slope sponges (Porifera, Demospongiae) at the Faroe Islands, northeastern Atlantic

Klitgaard

1995

Sarsia

141

132

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At least 242 epi-and infauna species were found, of which 115 are reported as sponge associates for the first time in the North Atlantic. Sixty species, 19 genera and 1 family are recorded for the first time from the Faroes. Two hundred and twenty-five taxa were found as epifauna on the sponges, three taxa occurred as infauna and 14 taxa both as epi-and infauna.The morphology of the sponges influences the occurrence and composition of the represented fauna. Thus, the largest number of taxa were present on sponges having a spicule 'fur'. A number of species showed preference for the oscular cavities of S. ponderosus and the incurrent furrow of T. levis and T. valdiviae. Only one sponge predator, Hanleya nagelfar, was found. The majority of the associated fauna uses the sponges as a substratum. Three categories of direct effect of interactions between the sponges and the associated fauna are proposed. The results of the present investigation show that demosponges constitute a substratum for a large number of benthic taxa on the outer shelf and upper slope in the northeastern Atlantic, and that the scarcity of earlier reports is a result of insufficient investigation. It is suggested that the fauna associated with sponges in temperate to cold waters is facultative, representing the fauna of the local geographical area. This is in contrast to the large number of apparently obligate associates of Porifera in warm tropical waters.

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“…Other cryptic isopods, besides the one we found (Williams and Williams 1987), hyperparasitically infect the brood pouches of isopods. Stone and Heard (1989) found a new cryptic isopod in the serial fish isopod* Excorallana delaneyi Stone & Heard, 1989. Many species of cryptic isopods remain undescribed.…”

Section: Further Life Historymentioning

confidence: 99%

Life Cycle and Life History Strategies of Parasitic Crustacea

Williams

Bunkley-Williams

2019

Parasitic Crustacea

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Different parasitic life strategies are described including four new life cycles: complex rebrooding, micro-male, mesoparasite and prey-predator transfer. Four new life cycle behaviours are named: nursery hiding, mid-moult stage, positive precursor (intraspecific antagonism) and negative precursor (ambush strategy). Further strategies discussed are opossum attack, double parasitism (doubling of the normal reproductive set), duplex arrangement (separated male-female pairs), simple rebrooding, and describing how displaced parasites and superinfections may partly elucidate life cycles. Proportional stunting masks life history effects of parasitism; cuckoo copepods are true parasites and not just associates; burrowing barnacles (acrothoracicans) are not parasites. Further findings based on life cycle information: branchiurans and pentastomes are possibly not related; firefly seed shrimp are not parasites; copepod pre-adult life cycle stages are common in the western pacific but rare in Caribbean; harpacticoids on vertebrates are not parasites; cuckoo copepods are true parasites; explained the importance of pennellid intermediate hosts. Crustacean parasite life cycles are largely unknown (1% of species). Most crustacean life cycles represent minor modifications from the ancestral freeliving mode. Crustacean parasites have less complex and less modified life cycles than other major parasite groups. This limits their exploitation of, and effectiveness, in parasitism. However, these life cycles will be an advantage in Global Change. Most metazoan parasites will be eliminated while crustaceans (and nematodes) will inherit the new world of parasites.

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Excorallana delaneyi, N. Sp. (Crustacea: Isopoda: Excorallanidae) from the Northeastern Gulf of Mexico, with Observations on Adult Characters and Sexual Dimorphism in Related Species of Excorallana Stebbing, 1904

Cited by 4 publications

References 3 publications

<b>Host-parasite interaction between crustaceans of six fish species from the Brazilian Amazon

<b>Host-parasite interaction between crustaceans of six fish species from the Brazilian Amazon

The fauna associated with outer shelf and upper slope sponges (Porifera, Demospongiae) at the Faroe Islands, northeastern Atlantic

Life Cycle and Life History Strategies of Parasitic Crustacea

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