Influence of oceanographic dynamics on squid paralarvae distribution from the southern Mexican Pacific Ocean (rainy seasons 2007-2008)
Influence of the oceanographic dynamic in size distribution of cephalopod paralarvae from the southern Mexican Pacific Ocean (rainy seasons 2007 and 2008)
| dc.contributor | Instituto Politécnico Nacional | en-US |
| dc.contributor | Instituto Politécnico Nacional | es-ES |
| dc.creator | Aceves Medina, Gerardo | |
| dc.creator | De Silva-Dávila, Roxana | |
| dc.creator | Cruz Estudillo, Iván | |
| dc.creator | Durazo, Reginaldo | |
| dc.creator | Avendaño-Ibarra, Raymundo | |
| dc.date | 2017-05-22 | |
| dc.date.accessioned | 2020-11-05T13:36:05Z | |
| dc.date.available | 2020-11-05T13:36:05Z | |
| dc.identifier | http://lajar.ucv.cl/index.php/rlajar/article/view/vol45-issue2-fulltext-11 | |
| dc.identifier | 10.3856/vol45-issue2-fulltext-11 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/158920 | |
| dc.description | The Southern Mexican Pacific Ocean presents strong seasonal changes related with the rainy and the Tehuano wind seasons that generate different mesoscale processes affecting biological productivity and marine biodiversity. In this region, we analyzed the cephalopod paralarval community collected during July 2007 and May-June 2008 in relation to the regional oceanography in absence of Tehuano winds. The samples were collected with standard Bongo net tows and CTD hauls were performed to determine the structure of the water column. No significant changes in temperature at 10 m depth were registered among the analyzed seasons. Although the number of taxa, the community composition, and the total abundance of paralarvae were similar between seasons, the percentage of close to the hatching paralarvae (≤2.0 mm) was almost twice in May-June than during July. In July, paralarvae ≤2.0 mm distributed at the edge of the cyclonic and anticyclonic eddies, related to high temperatures, low chlorophyll a concentrations and low zooplankton volumes. During May-June the geostrophic currents determined the distribution of one coastal and one oceanic paralarval groups in high and low chlorophyll a concentrations respectively separated by the upwelling front and related also, to the edge of the cyclonic eastern eddy. The distribution of the SD Complex and Abraliosis paralarvae close to the hatching size over the continental shelf and oceanic zone suggests a coupling of these cephalopods reproduction with the regional productivity pulses. | en-US |
| dc.description | The southern Mexican Pacific Ocean presents seasonal changes related to the rainy season and Tehuano winds, which generate mesoscale processes affecting biological productivity and marine biodiversity. Size distributions of squid paralarvae collected in this region during the rainy season (July 2007 and May-June 2008) were analyzed in relation to regional oceanography. Samples were collected through oblique hauls, and CTD casts were used to determine the structure of the water column. Between surveyed periods, there were no significant changes in the water temperature at 10 m, but there were significant variations in the mixed layer depth (MLD). The number of taxa, community composition and total abundance of paralarvae were similar between periods. However, in July paralarvae ≤2.0 mm were distributed along the margins of cyclonic and anticyclonic eddies associated with high temperatures. In May-June, the MLD and high concentrations of chlorophyll a (Chl-a) determined the presence of a group of oceanic paralarvae and another of coastal paralarvae, separated by an upwelling front. The percentage of recently spawned paralarvae (≤2.0) nearly doubled during this period as a result of increased coastal sampling and high concentrations of Chl-a, indicating a coupling of adult reproduction with regional productivity. In the absence of winds, the mesoscale oceanographic complexity generates gradients and a differential effect on the distribution, transport and survival of cephalopod paralarvae. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Pontificia Universidad Católica de Valparaíso | en-US |
| dc.relation | http://lajar.ucv.cl/index.php/rlajar/article/view/vol45-issue2-fulltext-11/806 | |
| dc.source | Latin American Journal of Aquatic Research; Vol 45, No 2 (2017); 356-369 | en-US |
| dc.source | Plataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 45, No 2 (2017); 356-369 | es-ES |
| dc.source | 0718-560X | |
| dc.source | 0718-560X | |
| dc.subject | Gulf of Tehuantepec, hatching areas, Paralarvae, squid | en-US |
| dc.subject | Eddies, paralarvae, hatching areas, squid, Gulf of Tehuantepec | es-ES |
| dc.title | Influence of oceanographic dynamics on squid paralarvae distribution from the southern Mexican Pacific Ocean (rainy seasons 2007-2008) | en-US |
| dc.title | Influence of the oceanographic dynamic in size distribution of cephalopod paralarvae from the southern Mexican Pacific Ocean (rainy seasons 2007 and 2008) | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | en-US | |
| dc.type | es-ES |