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Effect of closed v. intermittent-flow respirometry on hypoxia tolerance in the shiner perch Cymatogaster aggregata

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This study compares the critical oxygen saturation (O2crit) levels of the shiner perch Cymatogaster aggregata obtained using two different methods wherein hypoxia is induced either by the fish’s respiration (closed respirometry) or by degassing oxygen with nitrogen (intermittent-flow respirometry). Fish exhibited loss of equilibrium at a higher O2 saturation in the closed respirometry method when compared with the intermittent-flowmethod. Utilization of closed respirometry yieldedO2crit measurements that were almost twice as high as those obtained with intermittent-flow respirometry. The lower hypoxia tolerance in closed respirometry is consistent with additional stress, caused by a build-up of ammonia and carbon dioxide and a faster rate in dissolved oxygen decline. The results indicate that
these two methods of determining hypoxia tolerance in aquatic organisms are not comparable, and that much care should be given to method choice.

Key words: aquatic breathers; critical oxygen saturation level; hypoxic; physiology; respiration; stress.

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Fish Biology

No. Panggil

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Penerbit

: The Fisheries Society of the British Isles., 2016

Deskripsi Fisik

Journal of Fish Biology (2016) 88, 252–264

Bahasa

English

ISBN/ISSN

doi:10.1111/jfb.1283

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

Agriculture

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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