Transmission of Corynosoma australe (Acanthocephala: Polymorphidae) from fishes to South American sea lions Otaria flavescens in Patagonia, Argentina
Por:
Hernández-Orts J.S., Montero F.E., García N.A., Crespo E.A., Raga J.A., García-Varela M., Aznar F.J.
Publicada:
1 feb 2019
Ahead of Print:
1 ene 2019
Resumen:
Acanthocephalans display a two-host life cycle that involves arthropods
as intermediate hosts and vertebrates as definitive hosts. Some species
also use paratenic hosts to bridge the trophic gap between both
obligatory hosts. However, the relative role of these paratenic hosts in
the transmission to definitive hosts has seldom been assessed
quantitatively. We report on infection patterns of cystacanths of
Corynosoma australe Johnston, 1937 in 20 common teleost species and the
Argentine shortfin squid Illex argentinus (Castellanos) from the
Patagonian shelf of Argentina. We also explore the role of different
fish species in the transmission of C. australe to the most important
definitive host in the area, i.e. the South American sea lion Otaria
flavescens Shaw. Cystacanths of C. australe were found in all host
species except Heliconus lahillei Norman, Merluccius hubbsi Marini and
I. argentinus. In eight fish species, the prevalence of C. australe was
>50% and mean intensity >4, i.e. Acanthistius patachonicus (Jenyns),
Nemadactylus bergi (Norman), Paralichthys isosceles Jordan, Percophis
brasiliensis Quoy & Gaimard, Prionotus nudigula Ginsburg, Scomber
colias Gmelin, Raneya brasiliensis (Kaup) and Xystreurys rasile
(Jordan). Two surveys on the trophic ecology of South American sea lions
in the study area consistently found a generalist diet dominated by M.
hubbsi, and data on the frequency of occurrence and number of other fish
and cephalopod species in stomach contents strongly suggest that only R.
brasiliensis may play a prominent role in the transmission of C.
australe. This result raises interesting questions on the costs of
paratenicity.
Filiaciones:
Hernández-Orts J.S.:
Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos Almirante Storni (CIMAS – CCT CONICET – CENPAT), San Antonio Oeste, Río Negro, Argentina
CIMAS CCT CONICET CENPAT, Ctr Invest Aplicada & Transferencia Tecnol Recurs, San Antonio Oeste, Rio Negro, Argentina
Montero F.E.:
Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Parque Científico, Universidad de Valencia, Paterna, Valencia, Spain
Univ Valencia, Inst Cavanilles Biodiversidad & Biol Evolut, Parque Cient, Valencia, Spain
García N.A.:
Laboratorio de Mamíferos Marinos, Centro para el Estudio de Sistemas Marinos (CESIMAR – CCT CONICET – CENPAT), Puerto Madryn, Chubut, Argentina
CESIMAR CCT CONICET CENPAT, Ctr Estudio Sistemas Marinos, Lab Mamiferos Marinos, Puerto Madryn, Chubut, Argentina
Crespo E.A.:
Laboratorio de Mamíferos Marinos, Centro para el Estudio de Sistemas Marinos (CESIMAR – CCT CONICET – CENPAT), Puerto Madryn, Chubut, Argentina
CESIMAR CCT CONICET CENPAT, Ctr Estudio Sistemas Marinos, Lab Mamiferos Marinos, Puerto Madryn, Chubut, Argentina
Raga J.A.:
Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Parque Científico, Universidad de Valencia, Paterna, Valencia, Spain
Univ Valencia, Inst Cavanilles Biodiversidad & Biol Evolut, Parque Cient, Valencia, Spain
García-Varela M.:
Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México (UNAM), Mexico City, Mexico
Univ Nacl Autonoma Mexico, Inst Biol, Dept Zool, Mexico City, DF, Mexico
Aznar F.J.:
Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Parque Científico, Universidad de Valencia, Paterna, Valencia, Spain
Univ Valencia, Inst Cavanilles Biodiversidad & Biol Evolut, Parque Cient, Valencia, Spain
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