Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi
Copepods play an important role in marine ecosystems as a direct link of energy transfer between primary producers and higher trophic level consumers, such as fish. In the Argentine Sea, the Patagonian stock of Argentine hake Merluccius hubbsi spawns from late austral spring (December) to early autu...
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todo:paper_09247963_v139_n_p433_Temperoni2023-10-03T15:46:00Z Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi Temperoni, B. Viñas, M.D. Martos, P. Marrari, M. Argentine Sea Copepod biodiversity Frontal features Merluccius hubbsi larvae Spawning ground Argentine Sea Copepod biodiversities Frontal features Merluccius hubbsi larvae Spawning grounds biodiversity energy flux fish frontal feature marine ecosystem nursery ground primary production recruitment (population dynamics) spatial analysis spawning ground tidal modeling trophic level Argentine Sea Atlantic Ocean Patagonia Copepoda Merluccius hubbsi Copepods play an important role in marine ecosystems as a direct link of energy transfer between primary producers and higher trophic level consumers, such as fish. In the Argentine Sea, the Patagonian stock of Argentine hake Merluccius hubbsi spawns from late austral spring (December) to early autumn (April) in the northern Patagonian shelf region (43°-45°30'S), in association with a highly productive tidal front system. Since hake larvae prey mainly upon copepods, the objective of this study was to assess the spatial variability in the abundance and diversity of these potential food items in different sectors of the front, as one of the possible factors affecting hake recruitment success. Two complementary mesh sizes (67 and 300. μm) were used to accurately target the entire copepod size spectrum. The copepod community was dominated by developmental stages < 1 mm in total length (eggs, nauplii, copepodites of cyclopoids and calanoids), and adults of the species Oithona helgolandica, Microsetella norvegica, Ctenocalanus vanus and Drepanopus forcipatus. Their spatial distribution was highly influenced by the across-shelf characteristics of the tidal front system, highlighting the impact of environmental features, mainly bottom temperature and salinity, in shaping the community. Abundances were higher in the transitional relative to the stratified sector of the system. Such sector would provide the appropriate conditions to sustain M. hubbsi larval growth resulting from high availability of adequate prey, the suitable thermal ranges, and the existence of retention mechanisms. © 2014 Elsevier B.V. Fil:Martos, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09247963_v139_n_p433_Temperoni |
| institution |
Universidad de Buenos Aires |
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I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentine Sea Copepod biodiversity Frontal features Merluccius hubbsi larvae Spawning ground Argentine Sea Copepod biodiversities Frontal features Merluccius hubbsi larvae Spawning grounds biodiversity energy flux fish frontal feature marine ecosystem nursery ground primary production recruitment (population dynamics) spatial analysis spawning ground tidal modeling trophic level Argentine Sea Atlantic Ocean Patagonia Copepoda Merluccius hubbsi |
| spellingShingle |
Argentine Sea Copepod biodiversity Frontal features Merluccius hubbsi larvae Spawning ground Argentine Sea Copepod biodiversities Frontal features Merluccius hubbsi larvae Spawning grounds biodiversity energy flux fish frontal feature marine ecosystem nursery ground primary production recruitment (population dynamics) spatial analysis spawning ground tidal modeling trophic level Argentine Sea Atlantic Ocean Patagonia Copepoda Merluccius hubbsi Temperoni, B. Viñas, M.D. Martos, P. Marrari, M. Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi |
| topic_facet |
Argentine Sea Copepod biodiversity Frontal features Merluccius hubbsi larvae Spawning ground Argentine Sea Copepod biodiversities Frontal features Merluccius hubbsi larvae Spawning grounds biodiversity energy flux fish frontal feature marine ecosystem nursery ground primary production recruitment (population dynamics) spatial analysis spawning ground tidal modeling trophic level Argentine Sea Atlantic Ocean Patagonia Copepoda Merluccius hubbsi |
| description |
Copepods play an important role in marine ecosystems as a direct link of energy transfer between primary producers and higher trophic level consumers, such as fish. In the Argentine Sea, the Patagonian stock of Argentine hake Merluccius hubbsi spawns from late austral spring (December) to early autumn (April) in the northern Patagonian shelf region (43°-45°30'S), in association with a highly productive tidal front system. Since hake larvae prey mainly upon copepods, the objective of this study was to assess the spatial variability in the abundance and diversity of these potential food items in different sectors of the front, as one of the possible factors affecting hake recruitment success. Two complementary mesh sizes (67 and 300. μm) were used to accurately target the entire copepod size spectrum. The copepod community was dominated by developmental stages < 1 mm in total length (eggs, nauplii, copepodites of cyclopoids and calanoids), and adults of the species Oithona helgolandica, Microsetella norvegica, Ctenocalanus vanus and Drepanopus forcipatus. Their spatial distribution was highly influenced by the across-shelf characteristics of the tidal front system, highlighting the impact of environmental features, mainly bottom temperature and salinity, in shaping the community. Abundances were higher in the transitional relative to the stratified sector of the system. Such sector would provide the appropriate conditions to sustain M. hubbsi larval growth resulting from high availability of adequate prey, the suitable thermal ranges, and the existence of retention mechanisms. © 2014 Elsevier B.V. |
| format |
JOUR |
| author |
Temperoni, B. Viñas, M.D. Martos, P. Marrari, M. |
| author_facet |
Temperoni, B. Viñas, M.D. Martos, P. Marrari, M. |
| author_sort |
Temperoni, B. |
| title |
Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi |
| title_short |
Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi |
| title_full |
Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi |
| title_fullStr |
Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi |
| title_full_unstemmed |
Spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the Argentine hake Merluccius hubbsi |
| title_sort |
spatial patterns of copepod biodiversity in relation to a tidal front system in the main spawning and nursery area of the argentine hake merluccius hubbsi |
| url |
http://hdl.handle.net/20.500.12110/paper_09247963_v139_n_p433_Temperoni |
| work_keys_str_mv |
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