Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front
Whitemouth croaker (Micropogonias furnieri) larvae obtained and hydrographic data collected in the Rio de la Plata estuary (35°S-56°W) between 1987 and 2000 were used to explore the early life stages spatial and temporal distribution patterns and their relation to oceanographic features. The spatial...
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todo:paper_02727714_v82_n4_p557_Braverman2023-10-03T15:15:22Z Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front Braverman, M.S. Acha, E.M. Gagliardini, D.A. Rivarossa, M. fish larvae larvae retention Río de la Plata estuary (35°S-56°W) salinity front Sciaenids turbidity front estuarine environment larva oceanography salinity sampling spatial distribution temporal distribution turbidity Rio de la Plata South America Argyrosomus macrophthalmus Micropogonias furnieri Sciaenidae Whitemouth croaker (Micropogonias furnieri) larvae obtained and hydrographic data collected in the Rio de la Plata estuary (35°S-56°W) between 1987 and 2000 were used to explore the early life stages spatial and temporal distribution patterns and their relation to oceanographic features. The spatial distribution, restricted to a band in the inner part of the estuary, coincided with the bottom salinity front and the maximum turbidity zone (MTZ, turbidity front). Larvae were present during the warmest months (October through May) within a range of 14-24.5 °C temperature and 0.9-33 salinity. A vertically stratified sampling performed in the region where the largest abundance was found (December 2005 and March 2006) was used to test the hypothesis that larvae retention occurs in the bottom salinity front. The vertically stratified sampling showed larvae throughout the water column with high predominance in the river-estuary transition zone. A positive correlation between abundance and the bottom salinity horizontal gradient was found. The size analysis showed that the largest individuals (>10 mm SL), probably undergoing the settlement process, inhabited near the bottom and that the smallest (<10 mm SL) were present in the whole water column. Length distribution along the front showed no trend. Results support the estuarine retention hypothesis of previous studies on whitemouth croaker gravid females, eggs distribution and outcomes from a numerical simulation model. Retention in the salinity front/MTZ would allow larvae to benefit from food accumulation in the region, the high turbidity level provide shelter against predators and retention in the estuary secure closeness to the main nursery ground. © 2009 Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02727714_v82_n4_p557_Braverman |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
fish larvae larvae retention Río de la Plata estuary (35°S-56°W) salinity front Sciaenids turbidity front estuarine environment larva oceanography salinity sampling spatial distribution temporal distribution turbidity Rio de la Plata South America Argyrosomus macrophthalmus Micropogonias furnieri Sciaenidae |
| spellingShingle |
fish larvae larvae retention Río de la Plata estuary (35°S-56°W) salinity front Sciaenids turbidity front estuarine environment larva oceanography salinity sampling spatial distribution temporal distribution turbidity Rio de la Plata South America Argyrosomus macrophthalmus Micropogonias furnieri Sciaenidae Braverman, M.S. Acha, E.M. Gagliardini, D.A. Rivarossa, M. Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front |
| topic_facet |
fish larvae larvae retention Río de la Plata estuary (35°S-56°W) salinity front Sciaenids turbidity front estuarine environment larva oceanography salinity sampling spatial distribution temporal distribution turbidity Rio de la Plata South America Argyrosomus macrophthalmus Micropogonias furnieri Sciaenidae |
| description |
Whitemouth croaker (Micropogonias furnieri) larvae obtained and hydrographic data collected in the Rio de la Plata estuary (35°S-56°W) between 1987 and 2000 were used to explore the early life stages spatial and temporal distribution patterns and their relation to oceanographic features. The spatial distribution, restricted to a band in the inner part of the estuary, coincided with the bottom salinity front and the maximum turbidity zone (MTZ, turbidity front). Larvae were present during the warmest months (October through May) within a range of 14-24.5 °C temperature and 0.9-33 salinity. A vertically stratified sampling performed in the region where the largest abundance was found (December 2005 and March 2006) was used to test the hypothesis that larvae retention occurs in the bottom salinity front. The vertically stratified sampling showed larvae throughout the water column with high predominance in the river-estuary transition zone. A positive correlation between abundance and the bottom salinity horizontal gradient was found. The size analysis showed that the largest individuals (>10 mm SL), probably undergoing the settlement process, inhabited near the bottom and that the smallest (<10 mm SL) were present in the whole water column. Length distribution along the front showed no trend. Results support the estuarine retention hypothesis of previous studies on whitemouth croaker gravid females, eggs distribution and outcomes from a numerical simulation model. Retention in the salinity front/MTZ would allow larvae to benefit from food accumulation in the region, the high turbidity level provide shelter against predators and retention in the estuary secure closeness to the main nursery ground. © 2009 Elsevier Ltd. All rights reserved. |
| format |
JOUR |
| author |
Braverman, M.S. Acha, E.M. Gagliardini, D.A. Rivarossa, M. |
| author_facet |
Braverman, M.S. Acha, E.M. Gagliardini, D.A. Rivarossa, M. |
| author_sort |
Braverman, M.S. |
| title |
Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front |
| title_short |
Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front |
| title_full |
Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front |
| title_fullStr |
Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front |
| title_full_unstemmed |
Distribution of whitemouth croaker (Micropogonias furnieri, Desmarest 1823) larvae in the Río de la Plata estuarine front |
| title_sort |
distribution of whitemouth croaker (micropogonias furnieri, desmarest 1823) larvae in the río de la plata estuarine front |
| url |
http://hdl.handle.net/20.500.12110/paper_02727714_v82_n4_p557_Braverman |
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