Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/10912
Título: Preliminary results on light conditions manipulation in Octopus vulgaris (Cuvier, 1797) paralarval rearing
Autor: Garrido, Diego
Reis, Diana
Orol, Diego
Gonçalves, Rui
Martín, M.
Sykes, António V.
Rodríguez, Covadonga
Felipe, Beatriz
Zheng, Xiaodong
Lagos, Luis
Almansa, Eduardo
Palavras-chave: Blue filter
Octopus vulgaris
Paralarvae rearing
Polarized light
Reflection light
Data: 2017
Editora: MDPI
Resumo: High paralarvae mortality is a major bottleneck currently hindering the control over the lifecycle of common octopus (Octopus vulgaris Cuvier, 1797). It is believed that this problem might be related to either zoo-technical and/or nutritional aspects. The present paper is focused on the study of different zoo-technical aspects related to light conditions on the rearing of paralarvae, including the effects of polarization in prey ingestion, the use of a blue filter to simulate natural conditions, and the use of focused light to avoid reflections of the rearing tank’s walls. In the first experiment, O. vulgaris paralarvae ingestion of Artemia sp. and copepods (Tisbe sp.) was assessed under either normal or polarized light. In the second experiment, the effect of a blue filter with natural light or focused artificial light on growth and mortality was assessed over 15 days of rearing. Ingestion rate was not influenced by light polarization. Nonetheless, a significantly higher ingestion of Artemia sp. with respect to copepods was observed. The blue filter promoted the use of natural light conditions in Octopus paralarval culture, while focused light reduced the collision of the paralarvae against the walls. However, no significant differences were found in paralarval growth nor survival.
Peer review: yes
URI: http://hdl.handle.net/10400.1/10912
DOI: 10.3390/fishes2040021
ISSN: 2410-3888
Aparece nas colecções:CCM2-Artigos (em revistas ou actas indexadas)

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