caa a22 4500 606226680 CHVBK 20210128101154.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s10641-014-0259-2 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0259-2 Population structure, production and feeding habit of the sand goby Pomatoschistus minutus (Actinopterygii: Gobiidae) in the Minho estuary (NW Iberian Peninsula) [Elektronische Daten] [A. Souza, E. Dias, J. Marques, C. Antunes, I. Martins] Estuaries are highly productive and heterogeneous ecosystems, and hence they provide an excellent opportunity to study the population structure and feeding patterns of euryhaline species like the sand goby Pomatoschistus minutus. In this context the population dynamics of the sand goby was investigated during 18months in the Minho estuary (NW Iberian Peninsula). The fish density varied significantly among estuarine areas and seasons, with most of the individuals being caught near the river mouth during the autumn (38% of the total). Males, females and juveniles were not spatially segregated, as well as fishes belonging to different size classes. The sand goby fed mostly on crustaceans (Frequency of Occurrence - FO) = 35%; Relative Abundance - RA = 40%), detritus (FO = 27%; RA = 23%) and annelids (FO = 15%; RA = 14%), with no obvious difference between the diet of males and females. The density (up to 20 times) and the secondary production (up to 16 times) of the sand goby were substantially higher than in other southern European estuaries. Our results highlighted that the population dynamics of the sand goby can vary considerably among nearby systems and that the Minho estuary, probably due to the lower temperature and salinity values and also the different water circulation regime found in this system when compared to other Iberian estuaries, promotes noticeable differences on the P. minutus population dynamics. Springer Science+Business Media Dordrecht, 2014 Competition nationallicence Diet nationallicence Fish nationallicence Minho estuary nationallicence Population ecology nationallicence Souza A. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal aut Dias E. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal aut Marques J. IMAR - CMA, Institute of Marine Research - Centre for Sea and Environment, Department of Life Sciences, University of Coimbra, 3004-517, Coimbra, Portugal aut Antunes C. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal aut Martins I. IMAR - CMA, Institute of Marine Research - Centre for Sea and Environment, Department of Life Sciences, University of Coimbra, 3004-517, Coimbra, Portugal aut Environmental Biology of Fishes Springer Netherlands 98/1(2015-01-01), 287-300 0378-1909 98:1<287 2015 98 10641 https://doi.org/10.1007/s10641-014-0259-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0259-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Souza A. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal aut NATIONALLICENCE 700 1- Dias E. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal aut NATIONALLICENCE 700 1- Marques J. IMAR - CMA, Institute of Marine Research - Centre for Sea and Environment, Department of Life Sciences, University of Coimbra, 3004-517, Coimbra, Portugal aut NATIONALLICENCE 700 1- Antunes C. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Rua dos Bragas 289, P 4050-123, Porto, Portugal aut NATIONALLICENCE 700 1- Martins I. IMAR - CMA, Institute of Marine Research - Centre for Sea and Environment, Department of Life Sciences, University of Coimbra, 3004-517, Coimbra, Portugal aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/1(2015-01-01), 287-300 0378-1909 98:1<287 2015 98 10641