The study of primary production from phytoplankton in estuarine regions is of basic importance, to projects of culture of oysters, shrimps and fishes. In this paper a study was made of the primary production in the Rio Curú's estuary (Ceará-Brasil), during the period from September, 1977 to May, 1978. We used the Winkler's method to make the measurement of productions. The data obtained on oxygen produced varied from 0.03 to 0.04 m LO2 |l| hour of light, for net production and 0.01 to 0.04 ml O2 |l| hour of light for the total production. Qualitative and quantitative studies were also made to obtain the dominant species and the most abundant and most frequent species.

Nesta nota, os autores registram a primeira ocorrência de Philometra lateolabracis Yamaguti, 1935, no Atlântico e em novo hospediero. Reportam também a presença de um macho de proporções diminutas encontrado em estreita relação com as fêmeas de Ph. lateolabracis; sendo os machos desta espécie desconhecidos, admitem a possibilidade deste minúsculo nematódeo tratar-se do macho da citada espécie.

In this paper the authors refere Philometra lateolabracis Yamaguti, 1935 for the first time from the Atlantic Ocean also as a new host record. They report the rpesence of one male of diminished dimensions, found in close relationship with the females of Ph. lateolabracis; as the male of this species is unknown, they admit the possibility of this small nematode be the male of this species.