Ciclo de mudas e taxas de crescimento de Metamysidopsis elongata atlantica (Crustacea, Mysidacea) cultivado em diferentes temperaturas e salinidades

Abstract

ABSTRACT. Moulting cycle and growth rate of Metamysidopsis elongata atlantica (Crustacea, Mysidacea) reared at different temperatures and salinities. Metamysidopsis elongata atlantica (Bascescu, 1968) was reared in the laboratory at different combinations of temperature (13, 20, and 25°C) and salinity (25, 30, and 35‰) to estimate the intermoult period and carapace growth rate. Temperature affected both intermoult period and growth rate of the animals. Mysids reared at 13°C had longer intermoult periods than those reared at 20 and 25°C. While animals reared at 13°C had the longest longevity, females did not develop marsupium when reared at this temperature. Growth rate estimated for mysids aged between 0 to 14 days (age at the onset of maturity) was 0.02 mm/day, 0.04 mm/ day, and 0.05 mm/day for animals reared at 13°C, 20°C, and 25°C, respectively. KEYWORDS.Crustacea, Mysidae, Metamysidopsis elongata atlantica, growth rate, molts. (Bascescu, 1968) foi cultivada em laboratório em diferentes combinações de temperatura (13, 20, and 25°C) e salinidade (25, 30, and 35‰) para estimar o período de intermuda e a taxa de crescimento da carapaça. A temperatura afetou o período de intermuda e a taxa de crescimento dos animais. Misidiáceos criados a 13°C tiveram maiores períodos de intermuda que aqueles cultivados a 20 and 25°C. Enquanto animais criados a 13°C tiveram maior longevidade, fêmeas não desenvolvem marsúpio quando cultivadas nesta temperatura. A taxa de crescimento estimada para misidáceos entre 0 a 14 dias (idade no início da maturidade) foi 0,02 mm/dia, 0,04 mm/dia, e 0,05 mm/dia para animais cultivados respectivamente a 13°C, 20°C e 25°C. RESUMO. Metamysidopsis elongata atlantica PALAVRAS-CHAVE.Crustacea, Mysidae, Metamysidopsis elongata atlantica, taxa de crescimento, mudas.

Revision of mysids (Crustacea: Peracarida: Mysida) zoogeographical distribution in the south-west Atlantic (0° to 40°S)

“…Metamysidopsis e. atlantica usually is the most abundant and common species in coastal and estuarine waters of the south/south-east Brazilian coast (Bersano, 1994;Tararam et al, 1996;authors' own unpublished data), consequently it is the most studied species in this region. Studies relating to rearing techniques, feeding rates, moulting cycle, growth and response to gradients of temperature and salinity were carried out under laboratory conditions (Rörig et al, 1997;Gama & Zamboni, 1999;Gama et al, 2002Gama et al, , 2006Gama et al, , 2011 distribution Brazil: São Paulo, Ubatuba (Bȃcescu, 1968c), São Sebastião (Fries, 1999), Una do Prelado River (Lansac Tôha & Lima, 1993) and Cananeia estuary (Almeida Prado, 1973Prado, , 1974Tararam et al, 1996); Santa Catarina (Rörig et al, 1997; south-west atlantic mysids geographical distribution Resgalla, 2011); Rio Grande do Sul, Tramandaí Beach (Avila et al, 2009), Lagoa dos Patos estuary (Gama, 2008;Avila et al, 2011) and Cassino Beach (Bersano, 1994;Avila et al, 2011).…”

“…Later, studies by local and foreign scientists broadened the knowledge about regional mysid species richness with the description of new species from Brazilian (Bȃcescu, 1968a(Bȃcescu, , b, c, 1969(Bȃcescu, , 1984(Bȃcescu, , 1986Silva, 1970aSilva, , b, 1971aSilva, , b, 1972Silva, , 1974Silva, , 1979aReis & Silva, 1987; and Argentine waters (Hoffmeyer, 1993;Carcedo et al, 2013). To date, a limited amount of investigations concerning their biology (Loureiro Fernandes & Gama, 1996;Rörig et al, 1997;Gama & Zamboni, 1999;Gama et al, 2002Gama et al, , 2006Gama et al, , 2011, distribution and/or population structure Almeida Prado, 1973González, 1974;Silva, 1979b;Hoffmeyer, 1990;Tavares & Bond-Buckup, 1990; Tararam et al, 1996;Bond-Buckup & Tavares, 1998;Fries, 1999;Calliari et al, 2001Calliari et al, , 2007Schiariti et al, 2004Schiariti et al, , 2006Viñas et al, 2005;Cardelli et al, 2006;Borzone et al, 2007;Gama et al, 2007;Calil & Borzone, 2008;Gama, 2008) have been completed in the south-west Atlantic. In the late 1990s, Murano (1999) performed the most comprehensive review available to date of the mysidacean fauna (orders Mysida and Lophogastrida) of the South Atlantic Ocean, considering marine coastal and deep waters, including geographical and vertical distribution, detailed descriptions and illust...…”

Dial behavioral responses of Metamysidopsis elongata atlantica (Crustacea, Mysida) to gradients of salinity and temperature

“…This species was recorded in southeastern Brazil (Cananéia, state of São Paulo) (ALMEIDA-PRADO, 1974), as well as inhabiting the surf zone of sandy beaches (GAMA & ZAMBONI, 1999;GAMA et al, 2002;GAMA et al, 2006) and the surrounding area of Patos Lagoon Estuary in the state of Rio Grande do Sul (southern Brazil) (LOPES et al, 2006).…”