Larval Transport on the Atlantic Continental Shelf of North America: a Review

Epifanio, Charles E.; Garvine, Richard W.

doi:10.1006/ecss.2000.0727

Cited by 246 publications

(189 citation statements)

References 122 publications

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“…Due to the well-known negative influence of salinity on many zooplankton species (e.g. Hammer, 1993;Lansac-Tôha and Lima, 1993;Keller and Conlin, 1994;Williams, 1998;Epifanio and Garvine, 2001;Herbst, 2001;Ara, 2002;Derry et al, 2003;Toumi et al, 2005), one would expect to find lower rotifer richness and abundance at zones with higher salinity, but the opposite pattern was observed for the present study, salinity, richness and abundance showing higher values in the UZ. However, seasonally, salinity and rotifer numbers showed major contrasting patterns which were the most critical structuring forces on rotifer distribution in the present study.…”

Section: Discussioncontrasting

confidence: 65%

“…Wooldridge and Callahan, 2000;Fontaneto et al, 2006;Zakaria et al, 2007). Epifanio and Garvine (2001) also pointed out the physiological constraints of salinity on the larval stages of freshwater dwellers. On the other hand, many authors have detected a clear positive influence of freshwater on different zooplankton communities (Park and Marshall, 2000;Epifanio and Garvine, 2001;Kimmel et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Miracle and Serra, 1989;Hammer, 1993;Lansac-Tôha and Lima, 1993;Keller and Conlin, 1994;Onwudinjo and Egborge, 1994;Williams, 1998;Epifanio and Garvine, 2001;Herbst, 2001;Ara, 2002;Derry et al, 2003;Toumi et al, 2005;Fontaneto et al, 2006;Zakaria et al, 2007). However, despite these previously accomplished studies, new questions frequently arise and contrasting results suggest that the influence of environmental factors on species composition is site-dependent.…”

Section: Introductionmentioning

confidence: 99%

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Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)

et al. 2010

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The present study aimed at evaluating differences in rotifer distribution in three estuarine zones in an inverse estuary located in the Semiarid Region of Brazil. Zones were chosen based on their proximity to the ocean and river border as a means of reflecting a horizontal salinity gradient. High freshwater discharge during the rainy season was the major determinant of rotifer composition. On the other hand, due to higher salinity values during the dry season, very low values of species richness and abundance were observed in all zones. Therefore, the study highlights the constraints of salinity and the positive influence of seasonality and river proximity on rotifer species in a semiarid estuarine environment.Keywords: rotifera, zooplankton, salinity, tropical inverse estuary, Semiarid Brazil. Salinidade e descarga de água doce determinam a distribuição de rotíferos no estuário do Rio Mossoró (região semiárida do Brasil)Resumo O presente estudo objetivou avaliar diferenças na distribuição de rotíferos em três zonas estuarinas em um estuário inverso localizado na região semiárida do Brasil. As zonas foram escolhidas com base em suas proximidades com o oceano e a margem do rio de forma a representar um gradiente de salinidade horizontal. A forte entrada de água doce durante o período chuvoso foi o maior determinante da composição de rotíferos. Do outro lado, devido aos maiores valores de salinidade durante o período seco, valores muito baixos de riqueza de espécies e abundância foram observados em todas as zonas. Dessa forma, o estudo demonstra as restrições da salinidade e a influência positiva da sazonalidade e da proximidade com o rio sobre as espécies de rotíferos em um ambiente estuarino do semiárido.Palavras-chave: rotífera, zooplâncton, salinidade, estuário inverso tropical, semiárido do Brasil.

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Section: Discussioncontrasting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)

et al. 2010

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“…tidal flows, surface and subsurface currents and circulation) and active larval behaviour through horizontal and vertical movements (e.g. swimming, buuyancy control) (for fish see Boehlert and Mundy, 1988;Sponaugle and Cowen, 1997;Leis and Carson-Ewart, 1997;Forward et al, 1999;Epifanio and Garvine, 2001 and for crustaceans see Phillips, 1981;Sulkin, 1990;Young, 1995;Forward et al, 1997;Epifanio and Garvine, 2001). Interaction with water motion occurs at a range of scales, from near-substratum flow, which may influence the settlement process (centimetres-metres) (Butman, 1987;Breitburg et al, 1995) to Langmuir circulation and Ekman transport, tidal currents, internal waves, fronts, eddies and upwelling (100s metres-100s kilometres) (Phillips, 1981;Kingsford, et al, 1991;Shanks, 1995;Werner et al, 1997).…”

Section: Movements Of Eggs and Larvaementioning

confidence: 99%

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

Pittman

McAlpine

2003

Advances in Marine Biology

217

178

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“…Once released into the water column in estuaries with semidiurnal tides, the larvae are unusual in that they are retained in low-salinity areas of estuaries (Sandifer, 1973(Sandifer, , 1975Cronin, 1982;Lampert and Epifanio, 1982) and are not exported out of the estuary for development offshore as observed for many other species of crabs (Epifanio and Garvine, 2001). The mechanism for retention is that zoeae vertically migrate around the depth of no net horizontal motion of water.…”

Section: Retention Of Larvae In Estuaries and Vertical Migrationmentioning

confidence: 99%

Larval Biology of the CrabRhithropanopeus harrisii(Gould): A Synthesis

Forward

2009

The Biological Bulletin

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Abstract. This synthesis reviews the physiological ecology and behavior of larvae of the benthic crab Rhithropanopeus harrisii, which occurs in low-salinity areas of estuaries. Larvae are released rhythmically around the time of high tide in tidal estuaries and in the 2-h interval after sunset in nontidal estuaries. As in most subtidal crustaceans, the timing of larval release is controlled by the developing embryos, which release peptide pheromones that stimulate larval release behavior by the female to synchronize the time of egg hatching. Larvae pass through four zoeal stages and a postlarval or megalopal stage that are planktonic before metamorphosis. They are retained near the adult population by means of an endogenous tidal rhythm in vertical migration. Larvae have several safeguards against predation: they undergo nocturnal diel vertical migration (DVM) and have a shadow response to avoid encountering predators, and they bear long spines as a deterrent. Photoresponses during DVM and the shadow response are enhanced by exposure to chemical cues from the mucus of predator fishes and ctenophores. The primary visual pigment has a spectral sensitivity maximum at about 500 nm, which is typical for zooplankton and matches the ambient spectrum at twilight. Larvae can detect vertical gradients in temperature, salinity, and hydrostatic pressure, which are used for depth regulation and avoidance of adverse environmental conditions. Characteristics that are related to the larval habitat and are common to other crab larval species are considered.

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Larval Transport on the Atlantic Continental Shelf of North America: a Review

Cited by 246 publications

References 122 publications

Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)

Salinity and freshwater discharge determine rotifer distribution at the Mossoró River Estuary (Semiarid Region of Brazil)

Movements of Marine Fish and Decapod Crustaceans: Process, Theory and Application

Larval Biology of the CrabRhithropanopeus harrisii(Gould): A Synthesis

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