Acta Adriatica, Vol. 46 No. 1, 2005.
Izvorni znanstveni članak
Dynamics of the Acartia genus (Calanoida: Copepoda) in a temperate shallow estuary (the Mondego estuary) on the western coast of Portugal
Ulisses Miranda Azeiterio
Sónia Cotrim Maques
Luís Miguel Russo Viera
Manuel Ramiro Dias Pastorinho
Pedro Alfaia Barcia Ré
Mário Jorge Pereira
Fernando Manuel Raposo Morgado
Sažetak
The purpose of this work was to review the dynamics of the Acartia species in the Mondego estuary (a temperate North-Atlantic shallow estuary in Western Portugal) in a genus integrated perspective. The Acartia genus is represented in the system by the species Acartia clausi and Acartia tonsa; the samples were taken between July 1999 and June 2000, with 63 and 125 µm mesh size nets, and between January 2003 and January 2004, with a 335 µm mesh size net, in the downstream and upstream areas of the estuary. Significant differences in abundance were found between months and sampling stations for the two species (ANOVA, P < 0.05). A. clausi dominated in the downstream estuary, registering peaks in June (156 ind. m-3) and September (73 ind. m-3); in the upstream estuary this species showed a maximum of density in September (35 ind. m-3). A. tonsa dominated in the upstream estuary with peaks of abundance occurring in December (2372 ind. m-3) and October (1056 ind. m-3) in the downstream estuary this species exhibited higher abundance in August (52 ind. m-3). The two species of the genus coexist in time exhibiting a strong spatial segregation behavior in the estuary.
Ključne riječi
estuaries; Mondego estuary; Copepoda; Acartia; ecology
Hrčak ID:
74
URI
Datum izdavanja:
1.6.2005.
Posjeta: 2.935 *