Temporal and Spatial Distribution Patterns of Echinoderm Larvae in La Parguera, Puerto Rico
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| Format: | Artículo científico |
| Langue: | en |
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Universidad de Costa Rica
2010
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| _version_ | 1876481779262554112 |
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| author | Stacey M. Williams |
| author_facet | Stacey M. Williams |
| contents | Temporal and Spatial Distribution Patterns of Echinoderm Larvae in La Parguera, Puerto Rico Stacey M. Williams Jorge García-Sais Biología larvae Caribbean Puerto Rico Echinodermata Diadema antillarum This study describes temporal and spatial abundance patterns of echinoderm larvae in La Parguera, Puerto Rico. For the temporal study, larvae were sampled by a series of monthly tows taken with a 64um mesh net between the new and full moon from April 2005 to July 2006, September 2006 and August 2007. In order to measure spatial variation of echinoderm larval bundances, oblique tows were taken with 64 and 202μm mesh nets at seven different sites within the shelf, at the shelf-edge, and at a nearby oceanic stations during August 2007. Overall, Echinoidea (sea urchin) exhibited the highest abundance with a total of 11 921 larvae, representing 52.5% of the total collection. Ophiuroidea (brittle star) ranked second in abundance with 45.6% of the total larvae. Holothuroidea (sea cucumber) and Asteroidea larvae (sea star) accounted for less than 2% of the total echinoderm larval collection. Early larval stages (2-8 day old) of Diadema antillarum represented 20% of the total Echinoidea larvae. There was no marked seasonal trend of echinoderm larval abundance; Echinoidea and Ophiuroidea larvae were present in all monthly samples indicating that reproduction occurs year-round. Peak abundances of later-stage Echinoidea larvae were observed during January, July and October and of later-stage Ophiuroidea larvae during June, August and October. The observed peaks of later-stage larval abundances may be indicative of higher recruitment activity during these months. There was a significant difference of echinoderm larval abundance between spatial stations, with higher abundances collected at the shelf-edge. Later-stage (~24 day old) D. antillarum larvae were mostly collected at shelf-edge and oceanic locations. In addition, the 64mm mesh net was more efficient for collection of echinoderm larvae than the 202mm mesh net. Rev. Biol. Trop. 58 (Suppl. 3): 81-88. Epub 2010 October 01. 2010 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44920949008 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.58 |
| format | Artículo científico |
| id | redalyc_44920949008 |
| institution | Redalyc |
| language | en |
| publishDate | 2010 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Temporal and Spatial Distribution Patterns of Echinoderm Larvae in La Parguera, Puerto Rico Stacey M. Williams Biología larvae Caribbean Puerto Rico Echinodermata Diadema antillarum Temporal and Spatial Distribution Patterns of Echinoderm Larvae in La Parguera, Puerto Rico Stacey M. Williams Jorge García-Sais Biología larvae Caribbean Puerto Rico Echinodermata Diadema antillarum This study describes temporal and spatial abundance patterns of echinoderm larvae in La Parguera, Puerto Rico. For the temporal study, larvae were sampled by a series of monthly tows taken with a 64um mesh net between the new and full moon from April 2005 to July 2006, September 2006 and August 2007. In order to measure spatial variation of echinoderm larval bundances, oblique tows were taken with 64 and 202μm mesh nets at seven different sites within the shelf, at the shelf-edge, and at a nearby oceanic stations during August 2007. Overall, Echinoidea (sea urchin) exhibited the highest abundance with a total of 11 921 larvae, representing 52.5% of the total collection. Ophiuroidea (brittle star) ranked second in abundance with 45.6% of the total larvae. Holothuroidea (sea cucumber) and Asteroidea larvae (sea star) accounted for less than 2% of the total echinoderm larval collection. Early larval stages (2-8 day old) of Diadema antillarum represented 20% of the total Echinoidea larvae. There was no marked seasonal trend of echinoderm larval abundance; Echinoidea and Ophiuroidea larvae were present in all monthly samples indicating that reproduction occurs year-round. Peak abundances of later-stage Echinoidea larvae were observed during January, July and October and of later-stage Ophiuroidea larvae during June, August and October. The observed peaks of later-stage larval abundances may be indicative of higher recruitment activity during these months. There was a significant difference of echinoderm larval abundance between spatial stations, with higher abundances collected at the shelf-edge. Later-stage (~24 day old) D. antillarum larvae were mostly collected at shelf-edge and oceanic locations. In addition, the 64mm mesh net was more efficient for collection of echinoderm larvae than the 202mm mesh net. Rev. Biol. Trop. 58 (Suppl. 3): 81-88. Epub 2010 October 01. 2010 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44920949008 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.58 |
| title | Temporal and Spatial Distribution Patterns of Echinoderm Larvae in La Parguera, Puerto Rico |
| topic | Biología larvae Caribbean Puerto Rico Echinodermata Diadema antillarum |
| url | https://www.redalyc.org/articulo.oa?id=44920949008 |