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Effects of Loma morhua (Microsporidia) infection on the cardiorespiratory performance of Atlantic cod Gadus morhua (L).

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The microsporidian Loma morhua infects Atlantic cod (Gadus morhua) in the wild and in culture and
results in the formation of xenomas within the gill filaments, heart and spleen. Given the importance
of the two former organs to metabolic capacity and thermal tolerance, the cardiorespiratory performance
of cod with a naturally acquired infection of Loma was measured during an acute temperature increase (2 °C h
1) from 10 °C to the fish’s critical thermal maximum (CTMax). In addition, oxygen consumption and swimming performance were measured during two successive critical swimming speed (Ucrit) tests at 10 °C. While Loma infection had a negative impact on cod cardiac function at warm temperatures, and on metabolic capacity in both the CTMax and Ucrit tests (i.e. a reduction of 30–40%), it appears that the Atlantic cod can largely compensate for these Loma-induced cardiorespiratory limitations. For example, (i) CTMax (21.0  0.3 °C) and Ucrit (~1.75 BL s
1) were very comparable to those reported in previous studies using uninfected fish from the same founder population; and (ii) our data suggest that tissue oxygen extraction, and potentially the capacity for anaerobic metabolism, is enhanced in fish infected
with this microsporidian.

Keywords: cardiac performance, critical thermal maximum, gill pathology, heart pathology, metabolism,oxygen consumption.

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Fish Diseases

No. Panggil

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Penerbit

: The Authors., 2016

Deskripsi Fisik

Journal of Fish Diseases 2016, 39, 189–204

Bahasa

English

ISBN/ISSN

doi:10.1111/jfd.1235

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

-

Subjek

Agriculture

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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