Plankton studies in a mangrove environment: V. salinity tolerances of some planktonic crustaceans

Abstract

The salinity tolerances of adult females of some relevant species of planktonic copepods were studies in a mangrove region of the estuarine type, at 25º south latitude. Results showed a wide range in the salinity tolerances for the adultfemales of all the species studied. Based on these experiments the following order of salinity tolerance can be proposed: Pseudodiaptomus acutus > Euterpina acutifrons > Acartia lilljeborgi > Oithona ovalis > Centropages furcatus > Temora stylifera. A mechanism for the maintenance of Pseudodiaptomus acutus at certain regions of the area studied is proposed, based on experimental and field results. It seems probable, thus that salinity is an important factor in the distribution of some members of the zooplankton in this region.

Spatial and temporal distribution in density and biomass of two Pseudodiaptomus species (Copepoda: Calanoida) in the Caeté river estuary (Amazon region - North of Brazil)

“…Conversely, Tundisi & Matsumura-Tundisi (1968) and Araujo (1996) reported a positive and significant correlation between the same species and salinity. Moreover, the dominance of P. acutus in terms of density in areas of high salinity in the vicinity of river mouths (Medeiros, 1983;Santana-Barreto et al, 1991) was described as typical for mangrove areas, bays and estuaries (Montú & Cordeiro, 1998).…”

Tropical Ecological Systems

“…In Maracaibo estuary it is never present in the mouth but is very abundant through a mean salinity range of 2 to 10 0/00. Tundisi and Tundisi (1968) found that copepods migrate toward the bottom during high tide as the light intensity increases and are carried toward the upper reaches of the estuary with the countercurrent. If the circulation were the only process influencing the size of the population throughout the estuary, then distribution would be proportional to that of the fresh water.…”

“…The combined effect of these factors and the nutrient input by land drainage, mainly during the summer, could affect the timing of the phytoplankton growth and the selection of the nanno-and microplankton (Tundisi, 1970). 3.…”

Checklist dos Copepoda Calanoida de água doce do Estado de São Paulo

“…Para elaboração da lista de espécies dos Copepoda Calanoida de água doce do Estado de São Paulo, foram consultadas as seguintes referências bibliográficas: Sars (1901), Van Douwe (1911, Brandorff (1976), Wright (1936aWright ( ,1936bWright ( ,1937, Tundisi & Matsumura-Tundisi (1968), Tundisi (1980) Sendacz & Kubo (1982), MatsumuraTundisi (1986), Matsumura-Tundisi & Tundisi (2003), BIOTA/ FAPESP (Programa... 2003), Dussart & Matsumura-Tundisi (1986), Matsumura-Tundisi (2008), Matsumura-Tundisi et al (2010). (Wright 1936b, Wright, 1938, Sendacz & Kubo 1982, Programa BIOTA/FAPESP 2003 N. iheringi Wright (1935) 1, 3,4,5,7,9,10,14,15,19,21,22,23,25,26,27,28,31,32,34, 37,39,40,41,42,43,44,52,53,54,55,56 ,59,60,61,79,82…”