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Pugnose eels, Simenchelys parasiticus (Synaphobranchidae) from the heart of a shortfin mako, Isurus oxyrinchus (Lamnidae) - Environmental Biology of Fishes

  • ️Kohler, Nancy E.
  • ️Thu May 01 1997

Abstract

A 395 kg shortfin mako, Isurus oxyrinchus (Lamnidae) landed at Montauk, New York in June of 1992 was found to contain two dead, but otherwise healthy appearing pugnose eels, Simenchelys parasiticus (Synaphobranchidae) within the lumen of its heart. The path along which the eels made their way into the shark's heart was not found. Histological examination of the shark's heart revealed the presence of medial hyperplasia and hypertrophy of small arterioles, multifocal arteriosclerosis, and relatively high numbers of capillaries per unit area. These phenomena were not observed in similar sections taken from hearts of six uninfected mako sharks. The stomachs of both eels were filled with blood, suggesting that they had been within the shark at least long enough to feed. Consideration of this new record along with the literature supports a trophic designation of facultative endoparasite for the species Simenchelys parasiticus.

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Authors and Affiliations

  1. Department of Ecology and Evolutionary Biology, The University of Connecticut, Storrs, CT, 06269-3043, U.S.A

    Janine N. Caira

  2. Tennessee Aquarium, One Broad Street, P.O. Box 11048, Chattanooga, TN, 37401-2048, U.S.A

    George W. Benz

  3. Department of Pathobiology, The University of Connecticut, Storrs, CT, 06269-3043, U.S.A

    Joanna Borucinska

  4. National Marine Fisheries Service, Northeast Fisheries Science Center, Narragansett, RI, 02882, U.S.A

    Nancy E. Kohler

Authors

  1. Janine N. Caira

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  2. George W. Benz

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  3. Joanna Borucinska

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  4. Nancy E. Kohler

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Caira, J.N., Benz, G.W., Borucinska, J. et al. Pugnose eels, Simenchelys parasiticus (Synaphobranchidae) from the heart of a shortfin mako, Isurus oxyrinchus (Lamnidae). Environmental Biology of Fishes 49, 139–144 (1997). https://doi.org/10.1023/A:1007398609346

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  • Issue Date: May 1997

  • DOI: https://doi.org/10.1023/A:1007398609346