Comparative analysis of genetic variability among the sympatric shrimps Palaemon elegans and the highly commercialised P. serratus
Inés
González-Castellano1, 2*,
Zeltia
Torrecilla1, 2,
Alejandra
Perina1, 2, 3,
Nacho
Alborés2,
Ana
M.
González-Tizón1, 2 and
Andrés
Martínez-Lage1, 2
-
1
University of A Coruña, Department of Biology, Centro de Investigaciones Científicas Avanzadas (CICA), Spain
-
2
University of A Coruña, Department of Biology, Spain
-
3
AllGenetics & Biology SL, Spain
The common littoral shrimp Palaemon serratus (Pennant, 1777) and the rockpool shrimp P. elegans Rathke, 1873 are both marine shrimps with a wide native geographical distribution throughout the Atlantic Ocean (from the North Sea to Mauritania and Namibia, respectively), the entire Mediterranean Sea and the Black Sea. Palaemon serratus inhabits the intertidal and subtidal soft-sediment of estuaries and rocky bottoms covered with seagrass and algae. On the other hand, P. elegans is common in tidal rockpools and seagrass meadows and it also can be found in slightly brackish water close to river mouths. Although these species are morphologically similar, only P. serratus is under a high commercial exploitation in European countries such as UK, Ireland, Portugal and Spain. Specifically in Galicia (NW Spain), in the last decade 48-91 tonnes were traded per year, a worth of 2 million €/year. Here, a comparative population genetics analysis between these two Palaemon species was carried out. Three temporal cohorts from Ártabro Gulf (Galicia) were sampled for each species. Mitochondrial marker cytochrome c oxidase subunit I (COI) was amplified and sequenced in 159 and 110 individuals of P. serratus and P. elegans, respectively. Genetic diversity and demographic parameters for each cohort of each species were obtained and compared to detect temporal intraspecific differences and interspecific differences. Genetic differentiation between cohorts of the same species was assessed thorough pairwise FST indices. Effective population size (Ne) was also estimated for both species and it was compared between them. Overexploitation could lead to outbreeding depression and stock decline due to loss of genetic variability and low effective population size. Differences in population parameters between P. serratus and P. elegans could reveal the fishing effect over P. serratus in Galicia, in order to guarantee a sustainable management.
Keywords:
shrimp,
genetic variability,
cohort,
mitochondrial marker,
exploitation
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:
González-Castellano
I,
Torrecilla
Z,
Perina
A,
Alborés
N,
González-Tizón
AM and
Martínez-Lage
A
(2019). Comparative analysis of genetic variability among the sympatric shrimps Palaemon elegans and the highly commercialised P. serratus.
Front. Mar. Sci.
Conference Abstract:
IMMR'18 | International Meeting on Marine Research 2018.
doi: 10.3389/conf.FMARS.2018.06.00075
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Received:
28 Apr 2018;
Published Online:
07 Jan 2019.
*
Correspondence:
Mrs. Inés González-Castellano, University of A Coruña, Department of Biology, Centro de Investigaciones Científicas Avanzadas (CICA), A Coruña, E-15071, Spain, ines.gonzalez.castellano@udc.es