Seasonal abundance and vertical distribution of crab larvae from northern Patagonia (Argentina): implications for their transport in a biogeographic boundary region
| Autor: | Fernando Gaspar Dellatorre, Viviana Milano, Gustavo A. Lovrich, Nerina Delourdes Figueroa, Pedro J. Barón, Laura Rojas |
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| Rok vydání: | 2013 |
| Předmět: |
Larva
Ecology Ontogeny fungi Decapod Dispersal Ecología Aquatic Science Plankton Biology Seasonality Oceanography medicine.disease Ciencias Biológicas Larvae Abundance (ecology) medicine Biological dispersal Vertical migration Southwestern Atlantic Hydrography Diel vertical migration CIENCIAS NATURALES Y EXACTAS Ecology Evolution Behavior and Systematics |
| Zdroj: | Marine Biology Research. 10:37-50 |
| ISSN: | 1745-1019 1745-1000 |
| DOI: | 10.1080/17451000.2013.793805 |
| Popis: | In species with meroplanktonic larval phases, some reproductive traits (i.e. seasonality and larval behaviour) interact with hydrographic features to determine larval transport. This work reports the seasonal, diel and ontogenetic changes in vertical distribution of crab larvae in the boundary region between the Argentine and the Magellanic biogeographic provinces of the Atlantic coast off northern Patagonia (Golfo Nuevo; 42.75°S, 65.00°W). Larval seasonality was studied from 47 plankton hauls taken from August 2004 to July 2005. Vertical distribution was studied from 45 stratified plankton hauls carried out in August 2005, December 2005 and April 2006. Crab larval stages were detected throughout the year, but abundance was higher from midwinter to midsummer. Species from southern regions – Munida gregaria, Peltarion spinosulum and Halicarcinus planatus – were abundant during winter and aggregated mainly near the surface, regardless of the hour of the day. In contrast, species from northern regions – Platyxanthus patagonicus, Ovalipes trimaculatus, Leucippa pentagona, Leurocyclus tuberculosus, Cyrtograpsus spp. and Pachycheles chubutensis – were abundant during spring and summer and were usually aggregated near the surface during the night and dispersed in subsurface layers during the day. Ontogenetic changes in vertical distribution were not observed. Residual currents reported in the area (3–6 km·day−1) and duration of larval life (approximately 15–70 days) suggests a minimum potential transport on a 100-km scale. Biological information reported in this work could be explicitly incorporated in a circulation model to accurately predict larval transport and connectivity. Fil: Dellatorre, Fernando Gaspar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina Fil: Lovrich, Gustavo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Rojas, Laura. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina Fil: Milano, Viviana. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina Fil: Delourdes Figueroa, Nerina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina Fil: Baron, Pedro Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia; Argentina |
| Databáze: | OpenAIRE |
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