The role of acoustics in ecosystem-based fishery management

Koslow, J. Anthony

doi:10.1093/icesjms/fsp082

Cited by 74 publications

(45 citation statements)

References 69 publications

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“…Specifically, if this relationship between the habitat extent with landings or abundance estimates can be verified with additional years of data, then it could support the suggestion of an ecological, spatial indicator (sensu Woil lez et al 2009). This is of special importance for the Mediterranean basin, which is likely to become one of the regions most affected by the ongoing warming trend (Lejeusne et al 2010) and our ap proach can take advantage of the results of acoustic surveys that are regularly held for the monitoring of small pelagic fish stocks beyond the standard stock assessment purposes (Koslow 2009). …”

Section: Landings and Potential Habitatmentioning

confidence: 99%

Habitat suitability modelling for sardine Sardina pilchardus in a highly diverse ecosystem: the Mediterranean Sea

Tugores¹,

Giannoulaki²,

Iglesias³

et al. 2011

Mar. Ecol. Prog. Ser.

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Integrated information from different parts of the Mediterranean Sea was used to model the spatial and temporal variability of the distribution grounds of the sardine population. Acoustic data from the North Aegean Sea (Eastern Mediterranean), the Adriatic Sea (Central Mediterranean), the Sicily Channel (Central Mediterranean) and Spanish Mediterranean waters (Western Mediterranean) were analysed along with satellite environmental and bathymetric data to model the potential habitat of sardine during summer, autumn and early winter. Generalized additive models were applied in a presence−absence approach. Models were validated in terms of their predictive ability and used to construct maps exhibiting the probability of sardine presence throughout the entire Mediterranean basin as a measure of habitat adequacy for sardine. Bottom depth and sea surface temperature were the environmental variables that explained most of the data variability. Several areas along the Mediterranean coastline were indicated as suitable habitat for sardine in different seasons. An expansion of these areas over the continental shelf, up to 100 m depth, was consistently noticed from summer to winter. This was attributed to the horizontal movements of sardine related to spawning (i.e. winter period) and the peculiarities of the Mediterranean Sea where areas favouring growth, feeding and spawning processes tend to be localised and prevent a long range, offshore migration as opposed to large upwelling ecosystems. Moreover, within the study period, a positive relationship between the extent of sardine preferred habitat and landings was revealed for both summer and winter seasons throughout the entire Mediterranean Sea.

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Section: Landings and Potential Habitatmentioning

confidence: 99%

Habitat suitability modelling for sardine Sardina pilchardus in a highly diverse ecosystem: the Mediterranean Sea

Tugores¹,

Giannoulaki²,

Iglesias³

et al. 2011

Mar. Ecol. Prog. Ser.

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“…Although this study distinguished between major groups of organisms (schooling fish and mesozooplankton) based on their visual and morphometric characteristics, future studies could be improved by replacing the single frequency echosounder mooring with the increasingly available multi-frequency, splitbeam echosounders, which can provide information on target strength and improved target identification. The use of additional frequencies in combination with oceanographic buoy data could also improve the ability to include greater trophic levels, a goal for endto-end ecosystem models and studying predator-prey interactions (Koslow 2009).…”

Section: Discussionmentioning

confidence: 99%

Timing of forage fish seasonal appearance in the Columbia River plume and link to ocean conditions

Kaltenberg¹,

Emmett²,

Benoit‐Bird³

2010

Mar. Ecol. Prog. Ser.

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This study described the phenology and patterns of variability of forage fish and mesozooplankton populations near the Columbia River plume. Our objective was to identify the timing of the seasonal appearance of forage fish and to characterize the temporal patterns of abundance in relation to ocean conditions including zooplankton availability. Observations were collected at 2 stations in 2008 and 2009 using 200 kHz bio-acoustic moorings, and with bi-weekly net sampling surveys conducted at nearby stations to measure total fish density and relative species composition. Acoustic time series results revealed that the seasonal timing of acoustic schools, representing the forage fishes northern anchovy Engraulis mordax, whitebait smelt Allosmerus elongatus, and Pacific sardine Sardinops sagax, occurred abruptly, with specific dates of appearance identified at each station in mid-May in both years. Both 2008 and 2009 represented very similar years for the timing and strength of wind-driven coastal upwelling. The timing of forage fish appearances in these years was linked with ocean temperature and salinity data collected at a nearby oceanographic buoy but was poorly correlated with mesozooplankton abundance, which was highly variable and fluctuating over a period of hours to days. Fluctuations in zooplankton and forage fish populations drive many trophic interactions, including juvenile salmon, seabirds, and large predators (e.g. adult salmon) that rely on the timing and abundances of these populations and have significant implications for ecosystem based management.

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“…Making use of the information on the additional dimension, many old but also new ecological and stock-related questions can now be reinvestigated (Koslow 2009). For example, the functioning of pelagic schools could be elucidated by studying the relationship between school structure and school dynamics, for example by tracking schools in 3D (Trygonis et al 2009) and relating the two to environmental conditions on different spatial scales (Bertrand et al 2008).…”

Section: Perspectivesmentioning

confidence: 99%

“…Implementation of an ecosystem approach to fisheries management will require a wealth of information, not only on the biomass of exploited species but also on the relationship between predators and preys, on species relations in schools, on relations between schooling patterns and environmental conditions, etc. Acoustics in general and the ME70 in particular are going to be an essential tool for ecosystem studies (Koslow 2009). In conclusion, much progress has been made, but even more is still ahead.…”

Section: Perspectivesmentioning

confidence: 99%

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Overview of recent progress in fisheries acoustics made by Ifremer with examples from the Bay of Biscay

Trenkel

Berger

Bourguignon

et al. 2009

Aquat. Living Resour.

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-This paper provides an overview of the progress Ifremer has made recently in fisheries acoustics and the study of small pelagic fish by: i) pushing observation frontiers using a range of platforms including an autonomous underwater vehicle, AUV, ii) developing measuring instruments and methods and iii) studying fish distributions. Presently, information from several frequencies of single-beam echosounders is routinely collected together with data from the ME70 multibeam echosounder. For onboard data acquisition control the HERMES software was developed. The new MOVIES 3D software includes modules for simultaneous realistic 3D visualisation and post-processing such as bottom detection, school extraction and calculation of descriptors and integration of all acoustic data. Several data analysis methods are being developed and some initial results are presented. Finally, results on the spatial distribution of small pelagic fish schools in the Bay of Biscay illustrate the role that acoustics can play, and are already playing, in the implementation of an ecosystem approach to fisheries. Key words:Multibeam echosounder / Oceanographic AUV / Pelagic fish / Fisheries acoustics Résumé -Cet article présente une vue d'ensemble des avancées récentes de l'Ifremer en acoustique halieutique et une étude des petits poissons pélagiques tenant compte : i) de l'extension des limites de l'observation, en utilisant une gamme diverse de plates-formes dont un engin sous-marin autonome (AUV), ii) des développements méthodologiques et d'instruments de mesures, iii) de l'étude de la répartition des poissons. Désormais, les données de plusieurs fré-quences des sondeurs mono-faisceaux sont collectées en routine en parallèle à celles du sondeur multifaisceau ME70. Le logiciel HERMES a été développé pour le contrôle de l'acquisition des données à bord. Le nouveau logiciel MOVIES 3D comprend des modules de visualisation réaliste en 3D et de post-traitement (dont la détection du fond, l'extraction de bancs et le calcul de leurs descripteurs ainsi que l'intégration de toutes les données acoustiques). Plusieurs méthodes d'analyse de données sont en cours de développement et quelques premiers résultats sont présentés. Enfin, les résultats relatifs à la répartition spatiale des bancs de petits poissons pélagiques dans le golfe de Gascogne illustrent le rôle actuel et potentiel de l'acoustique dans la mise en place d'une approche écosystémique des pêches.

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The role of acoustics in ecosystem-based fishery management

Cited by 74 publications

References 69 publications

Habitat suitability modelling for sardine Sardina pilchardus in a highly diverse ecosystem: the Mediterranean Sea

Habitat suitability modelling for sardine Sardina pilchardus in a highly diverse ecosystem: the Mediterranean Sea

Timing of forage fish seasonal appearance in the Columbia River plume and link to ocean conditions

Overview of recent progress in fisheries acoustics made by Ifremer with examples from the Bay of Biscay

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