UV radiation effects on the embryos of anchoveta (Engraulis ringens) and common sardine (Strangomera bentincki) off central Chile

Marine and Freshwater Research - Tập 67 Số 2 - Trang 195 - 2016
Paulina Vásquez1, Alejandra Llanos‐Rivera2, LR Castro1, C. Fernández3,4,5,6,7
1Laboratorio de Oceanografía Pesquera y Ecología Larval (LOPEL), Departamento de Oceanografía and COPAS Sur Austral Program, PO Box 160-C Concepción, Universidad de Concepción, Concepción, Chile.
2Unidad de Biotecnología Marina, Facultad de Ciencias Naturales y Oceanográficas, PO Box 160-C Concepción, Universidad de Concepción, Concepción, Chile.
3COPAS SURAUSTRAL Program
4Centro FONDAP de Investigación en Dinámica de Ecosistemas Marinos de Altas Latitudes
5Interdisciplinary Center for Aquaculture Research = Centro Interdisciplinario de Investigación en Acuicultura Sustentable [Concepción, Chile]
6Laboratoire d'Océanographie Microbienne
7Universidad de Concepción - University of Concepcion [Chile]

Tóm tắt

It has been proposed that current levels of ultraviolet B (UVB) radiation could cause lethal or sublethal effects on fish embryos located in the upper layers of the water column. Observed levels of UVB off central Chile (36°S, 73°W) indicate that planktonic fish embryos could be exposed to harmful UVB radiation. From July 2011 to January 2012 embryos from anchoveta (Engraulis ringens) and common sardine (Strangomera bentincki) were used to test experimentally whether the UVB levels in central Chile produce lethal or sublethal effects in epipelagic fish embryos. Simultaneously, whether the embryos might be exposed to harmful UVB levels in the field was investigated. Our experimental results show that UVB may cause a decrease in hatching success, changes in buoyancy and embryonic malformations. These results, along with the observed vertical distribution of embryos and UVB radiation levels in the field during late spring suggest that lethal and sublethal effects may be occurring in the embryos of both species.

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Marine and Freshwater Research

Tập 67 Số 2

195

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