Study of the reproductive cycle of cockle (Cerastoderma edule, Linnaeus, 1758), from Lagoa de Óbidos, Leiria, Portugal
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1
Centro de Ciências do Mar e do Ambiente (IPLeiria), Portugal
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2
Centro de Ciências do Mar (CCMAR), Portugal
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3
Instituto Português do Mar e da Atmosfera (IPMA), Portugal
Increasing the knowledge about the reproductive cycle of the cockle species in Lagoa de Óbidos is of great important, essential even, for improving the population management in order to establish the collecting pattern, such as the closed season, due to this being a highly explored species in Lagoa de Óbidos. Thus, the present study describes the reproductive cycle of the Cerastoderma edule species in Lagoa de Óbidos (Portugal), through the histological analysis of the gonad development, biochemical composition (protein, glycogen and total lipids) as well as condition rate, for a ten month period (September 2016 to June 2017). Besides these parameters, water temperature, chlorophyll a and organic matter suspension were monitored. The reproductive cycle of cockles started with gametogenesis in September, followed by the mature stage from February through April and spawning March to June. The condition index remained stable along this period except for a significant rise at the beginning of gametogenesis and also higher levels of suspended organic matter. Cycles of nutrients storage and usage have shown that the accumulated energy is stored as proteins, glycogen and total lipids before gametogenesis, being proteins the predominant dry tissue constituent of the cockles. The glycogen showed the highest values between September and December, which were needed for the gametogenesis process, and that the lowest levels after the spawning. In the case of lipids, the highest values were in February and April corresponding to the beginning of maturation and spawning, respectively.This population follows a conservative strategy, which allows them to quickly recover the gonadal levels after spawning, possibly because they have enough food. The insight gained by this study may be an extremely important contribution for the management of cockle population in Lagoa de Óbidos and may contribute to the development of the aquaculture of this species.
Acknowledgements
This study had the support of Fundação para a Ciência e Tecnologia (FCT), through the strategic project UID/MAR/04292/2013 granted to MARE.
Keywords:
Cockle,
Cerastoderma edule,
reproductive cycle,
Biochemical composition,
condition index,
Lagoa de Óbidos.
Conference:
IMMR'18 | International Meeting on Marine Research 2018, Peniche, Portugal, 5 Jul - 6 Jul, 2018.
Presentation Type:
Poster Presentation
Topic:
Biodiversity, Conservation and Coastal Management
Citation:
Trindade
AB,
Pires
PJ,
Teixeira
S,
Ferreira
AR,
Machado
D,
Anjos
CM,
MENDES
SL,
Matias
D,
Joaquim
S and
Baptista
TM
(2019). Study of the reproductive cycle of cockle (Cerastoderma edule, Linnaeus, 1758), from Lagoa de Óbidos, Leiria, Portugal.
Front. Mar. Sci.
Conference Abstract:
IMMR'18 | International Meeting on Marine Research 2018.
doi: 10.3389/conf.FMARS.2018.06.00154
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Received:
30 Apr 2018;
Published Online:
07 Jan 2019.
*
Correspondence:
Miss. Ana B Trindade, Centro de Ciências do Mar e do Ambiente (IPLeiria), Peniche, Portugal, biatrindade_93@hotmail.com