This report presents the results of the fifth research cruise in the waters off Guiné-Bissau coast from 7 May to 5 July 1995, on board of the Portuguese RV “Capricórnio”. 33 plankton surveys using a FAO net were carried on.

A macrozoobenthos species list is provided, based on datasets originated from infra and circalittoral samples (4 to 120 m depth) collected in the marine waters from north to south of mainland Portugal. Species composition, density and wet weight biomass are provided. The data were collected in the framework of the of the EEMA Programme, whose aim was the Ecological Assessment of Water Masses in mainland Portugal.

The dataset provides a quantitative list of the macrozoobenthic taxa collected in the infra and circalittoral sandy bottom off Ericeira (central Portugal) in May 2001. The fauna was identified to species or family level. The aim was to characterize the macrozoobenthic composition of sandy sediments potentially suitable for beach nourishment, in order to assess the environmental impact of the dredging operations on the benthic communities.

The dataset provides a quantitative list of the benthic macrofauna taxa, identified to species level, which was collected from soft sediments in the Prof. Luiz Saldanha Marine Park (Arrábida, SW Portugal) between 2007 and 2009, at depths ranging from 10 to 100 m, aiming at describing community structure and distribution as well as classifying and mapping benthic habitats according to the EUNIS system.

A macrozoobenthos species list is provided, based on datasets originated from infra and upper circalittoral samples (10 to 53 m depth) collected in the soft sediment bottom off Sines within the marine area of the Southwest Alentejo and Vicentine Coast Natural Park (SW Portugal). Species composition and abundance per sampling station are provided.

The objective of this data collection was to study the structure of the mesopelagic ecosistem off the Northwestern Portuguese coast which is composed by planktonic and nectonics organisms. Mesopelagic organisms live during the day concentrating in big numbers in deeper depths while during the night migrates towards the upper layers. The data was collected aiming to study the composition and the Dynamics of the mesopelagic community and their trophic relations with the fish in the area. Data was collected with an Isaac-Kidd midwater trawl in May 1998 and 2000 and February 1999, together with environmental parameters as temperature, salinity, etc.

The objective of this data collection was to analise the daily vertical migration of decapod larvae in the water column in the northwestern portuguese coast and to assess its correlations with environmental parameteres. In order to do this plankton samples were collected with Bongo nets, LHPR multisampler and Neuston net in a area between the north western Portuguese coast and the 10 °W and between the 40° and 42°N and, aditionally at a fixed location during a 67 hours period, every two hours. In the fixed sampling point a plankton trap was also deployed. The data set presented corresponds to the zooplankton analysed in all the samples taken. This work is part of the ProRecruit project, which aimed to describe the spatial and temporal variability of the recruitment of coastal invertebrate species that show a planktonic larvar phase in their lifecylce, and understand the impact of environmental variables which may control its supply to the coastal systems.