2004
DOI: 10.1590/s1519-69842004000300017
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Reproductive aspects of marine cladocerans Penilia avirostris and Pseudevadne tergestina (Crustacea, Branchiopoda) in the outer part of Guanabara Bay, Brazil

Abstract: The objective of this study was to report on some aspects of marine cladoceran reproduction in Guanabara Bay. Samples were collected during 1985 using a conical net with 200 microm mesh. Two species were identified: Penilia avirostris and Pseudevadne tergestina. Both species disappeared from the plankton in winter. Two months before this phenomenon, parthenogenetic females displayed reduction in brood size, while gamogenetic individuals appeared among the populations. This sequence of events is generally typic… Show more

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Cited by 18 publications
(9 citation statements)
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“…Dormant stages of marine zooplankton (e.g., copepods, cladocerans, rotifers) occur in the sediments of temperate, sub-tropical and tropical bays and estuaries (Kasahara et al 1974;Snell et al 1983;Marazzo & Valentin 2004). The production of diapausing eggs by freshwater zooplankton species has been well-known for more than a century (Hairston & Kearns 2002).…”
Section: Introductionmentioning
confidence: 99%
“…Dormant stages of marine zooplankton (e.g., copepods, cladocerans, rotifers) occur in the sediments of temperate, sub-tropical and tropical bays and estuaries (Kasahara et al 1974;Snell et al 1983;Marazzo & Valentin 2004). The production of diapausing eggs by freshwater zooplankton species has been well-known for more than a century (Hairston & Kearns 2002).…”
Section: Introductionmentioning
confidence: 99%
“…Marine cladocerans present higher densities in coastal waters, but in a certain time of the year they can become rare (MARAZZO; VALENTIN, 2004). The Pleopis schmackeri (Poppe 1889) species has unknown ecological characteristics, due to low abundance and rare presence in tropical and coastal and tropical waters (MARAZZO, 2002).…”
mentioning
confidence: 99%
“…enquanto Tang et al (1995) e Marazzo & Valentin (2004b) (Gliwicz & Lampert, 1994). Em condições não favoráveis, cladóceros de água doce produzem ovos em menor quantidade, porém de maior tamanho, aumentando assim a chance de sobrevivência dos embriões (Guisande & Gliwicz, 1992).…”
Section: Dinâmica Populacionalunclassified
“…Indivíduos gamogênicos costumam representar uma baixa porcentagem da população, especialmente no meio marinho, onde as condições são mais estáveis do que em águas continentais (Hairston & Cáceres, 1996). No entanto, no presente estudo organismos gamogênicos representaram uma porcentagem menor (máximo de 1%) do que a encontrada na baía de Guanabara (36,5%; Marazzo & Valentin, 2004b) e no Mar Catalão (1 -20%; Atienza et al, 2008). A reprodução sexuada geralmente ocorre quando as condições ambientais estão adversas (Onbé, 1985).…”
Section: Dinâmica Populacionalunclassified
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