Skip to content

Research at St Andrews

From siphonophores to deep scattering layers: uncertainty ranges for the estimation of global mesopelagic fish biomass

Research output: Contribution to journalArticle

Abstract

The mesopelagic community is important for downward oceanic carbon transportation and is a potential food source for humans. Estimates of global mesopelagic fish biomass vary substantially (between 1 and 20 Gt). Here, we develop a global mesopelagic fish biomass model using daytime 38 kHz acoustic backscatter from deep scattering layers. Model backscatter arises predominantly from fish and siphonophores but the relative proportions of siphonophores and fish, and several of the parameters in the model, are uncertain. We use simulations to estimate biomass and the variance of biomass determined across three different scenarios; S1, where all fish have gas-filled swimbladders, and S2 and S3, where a proportion of fish do not. Our estimates of biomass ranged from 1.8 to 16 Gt (25–75% quartile ranges), and median values of S1 to S3 were 3.8, 4.6, and 8.3 Gt, respectively. A sensitivity analysis shows that for any given quantity of fish backscatter, the fish swimbladder volume, its size distribution and its aspect ratio are the parameters that cause most variation (i.e. lead to greatest uncertainty) in the biomass estimate. Determination of these parameters should be prioritized in future studies, as should determining the proportion of backscatter due to siphonophores.
Close

Details

Original languageEnglish
Pages (from-to)718-733
JournalICES Journal of Marine Science
Volume76
Issue number3
Early online date19 Apr 2018
DOIs
Publication statusPublished - May 2019

    Research areas

  • Myctophids, DSLs, Acoustics, Swimbladder, Pneumatophore, Scattering models , Resonance

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Internal lee waves and baroclinic bores over a tropical seamount shark ‘hot-spot’

    Hosegood, P. J., Nimmo-Smith, W. A. M., Proud, R., Adams, K. & Brierley, A. S., Mar 2019, In : Progress in Oceanography. 172, p. 34-50 17 p.

    Research output: Contribution to journalArticle

  2. Use of micronekton data and models to improve ecology of top predators

    Proud, R. & Brierley, A. S., 30 Nov 2018, Zenodo. 23 p.

    Research output: Book/ReportCommissioned report

  3. Biogeography of the global ocean's mesopelagic zone

    Proud, R., Cox, M. J. & Brierley, A. S., 9 Jan 2017, In : Current Biology. 27, 1, p. 113-119 7 p.

    Research output: Contribution to journalArticle

Related by journal

  1. ICES Journal of Marine Science (Journal)

    Simon Northridge (Member of editorial board)
    2016 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

  2. ICES Journal of Marine Science (Journal)

    Sophie Caroline Smout (Editor)
    1 Dec 201530 Dec 2015

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

  3. ICES Journal of Marine Science (Journal)

    Simon Northridge (Editor)
    20122015

    Activity: Publication peer-review and editorial work typesEditor of research journal

  4. ICES Journal of Marine Science (Journal)

    Sophie Caroline Smout (Reviewer)
    20112013

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

Related by journal

  1. Effect of temporal and spatial resolution on identification of fishing activities in small-scale fisheries using pots and traps

    Mendo, T., Smout, S., Russo, T., D’Andrea, L. & James, M., 28 Apr 2019, In : ICES Journal of Marine Science. Advance article, 9 p.

    Research output: Contribution to journalArticle

  2. Ecological best practice in decommissioning: a review of scientific research

    Fortune, I. S. & Paterson, D. M., 27 Sep 2018, In : ICES Journal of Marine Science. Advance article

    Research output: Contribution to journalReview article

  3. Disentangling the relative merits and disadvantages of parentage analysis and assignment tests for inferring population connectivity

    Christie, M., Meirmans, P., Gaggiotti, O. E., Toonen, R. & White, C., 1 Jul 2017, In : ICES Journal of Marine Science. 74, 6, p. 1749-1762

    Research output: Contribution to journalArticle

  4. Foraging behaviour and prey consumption by grey seals (Halichoerus grypus)-spatial and trophic overlaps with fisheries in a marine protected area

    Vincent, C., Ridoux, V., Fedak, M. A., McConnell, B. J., Sparling, C. E., Leaute, J. P., Jouma'a, J. & Spitz, J., 1 Nov 2016, In : ICES Journal of Marine Science. 73, 10, p. 2653-2665 13 p.

    Research output: Contribution to journalArticle

ID: 252882849