Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem
Time-series of fishing position, landings, satellite-derived sea-surface temperature and chlorophyll a concentrations were used to relate the spatial-temporal distribution of the Argentine hake Merluccius hubbsi with seasonal oceanographic processes in San Matías Gulf. Also, the seasonal effect of f...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v9_n4_p394_OcampoReinaldo http://hdl.handle.net/20.500.12110/paper_17451000_v9_n4_p394_OcampoReinaldo |
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paper:paper_17451000_v9_n4_p394_OcampoReinaldo2023-06-08T16:28:19Z Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem Natural resources distribution satellite-derived data sustainable management tidal front trawl fishery catch per unit effort chlorophyll a ecological impact fishing effort gadoid natural resource oceanography population structure satellite data sea surface temperature spatial distribution sustainable development time series analysis trawling Atlantic Ocean Patagonia San Matias Gulf Time-series of fishing position, landings, satellite-derived sea-surface temperature and chlorophyll a concentrations were used to relate the spatial-temporal distribution of the Argentine hake Merluccius hubbsi with seasonal oceanographic processes in San Matías Gulf. Also, the seasonal effect of fishing on the hake population structure was analysed. During summer the fleet was concentrated over the area of the frontal system, obtaining the best catch-per-unit-effort (CPUE) of hake in relatively deep waters. In autumn, the dispersion of the fleet due to a reduction in CPUE coincided with the dissipation of the front, suggesting that the distribution and shoaling of the Argentine hake is associated with seasonal thermal structures. In spring, the thermal structure of the waters and the chlorophyll a blooms seem to modulate the timing of spawning of hake, which occurs mainly in October-November. In addition, the fleet captured a higher proportion of females in the gonadal recovery stage during warm months (November-April). While winter catches (May-October) consisted mainly of males, the intense summer fishing may result in a high impact on the female population. This information is relevant to design of spatial management tools intended to provide biological sustainability to the hake fishery. © 2013 Copyright Taylor and Francis Group, LLC. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v9_n4_p394_OcampoReinaldo http://hdl.handle.net/20.500.12110/paper_17451000_v9_n4_p394_OcampoReinaldo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Natural resources distribution satellite-derived data sustainable management tidal front trawl fishery catch per unit effort chlorophyll a ecological impact fishing effort gadoid natural resource oceanography population structure satellite data sea surface temperature spatial distribution sustainable development time series analysis trawling Atlantic Ocean Patagonia San Matias Gulf |
| spellingShingle |
Natural resources distribution satellite-derived data sustainable management tidal front trawl fishery catch per unit effort chlorophyll a ecological impact fishing effort gadoid natural resource oceanography population structure satellite data sea surface temperature spatial distribution sustainable development time series analysis trawling Atlantic Ocean Patagonia San Matias Gulf Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem |
| topic_facet |
Natural resources distribution satellite-derived data sustainable management tidal front trawl fishery catch per unit effort chlorophyll a ecological impact fishing effort gadoid natural resource oceanography population structure satellite data sea surface temperature spatial distribution sustainable development time series analysis trawling Atlantic Ocean Patagonia San Matias Gulf |
| description |
Time-series of fishing position, landings, satellite-derived sea-surface temperature and chlorophyll a concentrations were used to relate the spatial-temporal distribution of the Argentine hake Merluccius hubbsi with seasonal oceanographic processes in San Matías Gulf. Also, the seasonal effect of fishing on the hake population structure was analysed. During summer the fleet was concentrated over the area of the frontal system, obtaining the best catch-per-unit-effort (CPUE) of hake in relatively deep waters. In autumn, the dispersion of the fleet due to a reduction in CPUE coincided with the dissipation of the front, suggesting that the distribution and shoaling of the Argentine hake is associated with seasonal thermal structures. In spring, the thermal structure of the waters and the chlorophyll a blooms seem to modulate the timing of spawning of hake, which occurs mainly in October-November. In addition, the fleet captured a higher proportion of females in the gonadal recovery stage during warm months (November-April). While winter catches (May-October) consisted mainly of males, the intense summer fishing may result in a high impact on the female population. This information is relevant to design of spatial management tools intended to provide biological sustainability to the hake fishery. © 2013 Copyright Taylor and Francis Group, LLC. |
| title |
Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem |
| title_short |
Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem |
| title_full |
Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem |
| title_fullStr |
Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem |
| title_full_unstemmed |
Spatial patterns of the Argentine hake Merluccius hubbsi and oceanographic processes in a semi-enclosed Patagonian ecosystem |
| title_sort |
spatial patterns of the argentine hake merluccius hubbsi and oceanographic processes in a semi-enclosed patagonian ecosystem |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17451000_v9_n4_p394_OcampoReinaldo http://hdl.handle.net/20.500.12110/paper_17451000_v9_n4_p394_OcampoReinaldo |
| _version_ |
1768543628905414656 |