Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery
Management of small-scale fisheries targeting sedentary stocks requires integration of information about processes operating and observable at different spatial and temporal scales. An integrated approach was developed with a scallop (Aequipecten tehuelchus) fishery in a small, semi-enclosed Patagon...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10543139_v68_n4_p696_Amoroso http://hdl.handle.net/20.500.12110/paper_10543139_v68_n4_p696_Amoroso |
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paper:paper_10543139_v68_n4_p696_Amoroso |
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paper:paper_10543139_v68_n4_p696_Amoroso2023-06-08T16:03:08Z Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery Coastal circulation Connectivity Metapopulation Remote sensing Scallop abundance bivalve coastal circulation connectivity fishing effort growth rate Landsat metapopulation remote sensing satellite data satellite imagery spatiotemporal analysis Atlantic Ocean San Jose Gulf San Matias Gulf Aequipecten tehuelchus Management of small-scale fisheries targeting sedentary stocks requires integration of information about processes operating and observable at different spatial and temporal scales. An integrated approach was developed with a scallop (Aequipecten tehuelchus) fishery in a small, semi-enclosed Patagonian basin as a demonstration case. Medium-resolution (30 m2) satellite (Landsat) data, used to identify circulation patterns, were combined with information from fishery surveys and recruitment experiments to link oceanographic processes with population dynamics. A frontal system splits San José Gulf (northern Argentine Patagonia) into two oceanographic domains (East and West) with distinct hydrographic regimes. In the West Domain, where circulation is highly advective and governed by turbulent vorticial fluxes, larval settlement on artificial collectors was insignificant over five reproductive seasons and no important scallop grounds were ever found. In the East Domain, where the main fishing grounds are, spat abundance varied between sites and years, but was always significant. Growth rates displayed strong clinal variation within the East Domain, decreasing clockwise away from the entrance to the Gulf and reflecting inferred circulation and gradual nutrient extinction. A physical mechanism capable of dispersing larvae over long distances towards the north, into the adjacent San Matias Gulf, was identified from Landsat images. The large-scale patterns of variation in growth, distribution, and recruitment of the Tehuelche scallop stock could not have been interpreted without an integrative approach to data assemblage and analysis, including satellite remote sensing. © 2010 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10543139_v68_n4_p696_Amoroso http://hdl.handle.net/20.500.12110/paper_10543139_v68_n4_p696_Amoroso |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Coastal circulation Connectivity Metapopulation Remote sensing Scallop abundance bivalve coastal circulation connectivity fishing effort growth rate Landsat metapopulation remote sensing satellite data satellite imagery spatiotemporal analysis Atlantic Ocean San Jose Gulf San Matias Gulf Aequipecten tehuelchus |
| spellingShingle |
Coastal circulation Connectivity Metapopulation Remote sensing Scallop abundance bivalve coastal circulation connectivity fishing effort growth rate Landsat metapopulation remote sensing satellite data satellite imagery spatiotemporal analysis Atlantic Ocean San Jose Gulf San Matias Gulf Aequipecten tehuelchus Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| topic_facet |
Coastal circulation Connectivity Metapopulation Remote sensing Scallop abundance bivalve coastal circulation connectivity fishing effort growth rate Landsat metapopulation remote sensing satellite data satellite imagery spatiotemporal analysis Atlantic Ocean San Jose Gulf San Matias Gulf Aequipecten tehuelchus |
| description |
Management of small-scale fisheries targeting sedentary stocks requires integration of information about processes operating and observable at different spatial and temporal scales. An integrated approach was developed with a scallop (Aequipecten tehuelchus) fishery in a small, semi-enclosed Patagonian basin as a demonstration case. Medium-resolution (30 m2) satellite (Landsat) data, used to identify circulation patterns, were combined with information from fishery surveys and recruitment experiments to link oceanographic processes with population dynamics. A frontal system splits San José Gulf (northern Argentine Patagonia) into two oceanographic domains (East and West) with distinct hydrographic regimes. In the West Domain, where circulation is highly advective and governed by turbulent vorticial fluxes, larval settlement on artificial collectors was insignificant over five reproductive seasons and no important scallop grounds were ever found. In the East Domain, where the main fishing grounds are, spat abundance varied between sites and years, but was always significant. Growth rates displayed strong clinal variation within the East Domain, decreasing clockwise away from the entrance to the Gulf and reflecting inferred circulation and gradual nutrient extinction. A physical mechanism capable of dispersing larvae over long distances towards the north, into the adjacent San Matias Gulf, was identified from Landsat images. The large-scale patterns of variation in growth, distribution, and recruitment of the Tehuelche scallop stock could not have been interpreted without an integrative approach to data assemblage and analysis, including satellite remote sensing. © 2010 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. |
| title |
Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| title_short |
Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| title_full |
Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| title_fullStr |
Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| title_full_unstemmed |
Zooming the macroscope: Medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| title_sort |
zooming the macroscope: medium-resolution remote sensing as a framework for the assessment of a small-scale fishery |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10543139_v68_n4_p696_Amoroso http://hdl.handle.net/20.500.12110/paper_10543139_v68_n4_p696_Amoroso |
| _version_ |
1768545703722745856 |