Chemoattraction of upstream migrating glass eelsAnguilla anguilla to earthy and green odorants

Sola, C. Ralph de

doi:10.1007/bf00002489

Cited by 41 publications

(40 citation statements)

References 26 publications

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“…In glass eels, the smell of inland waters is thought to provide a cue triggering the onset of swimming during STST (see Section 3.1), but also clues orienting movements towards rivers (Creutzberg 1961). Attraction is due to several earthy compounds (Sorensen 1986, Sola 1995, that may either attract or repel glass eels depending on environmental salinity (Sola and Tongiorgi 1996). It has been hypothesized that orientation towards earthy odorants during migration evolved because these compounds are indicative of habitat primary productivity (Sorensen 1986).…”

Section: Water Odour Migration and Habitat Selectionmentioning

confidence: 99%

Proximate and Ultimate Control of Eel Continental Dispersal

Édeline

Dufour

Élie

2009

Spawning Migration of the European Eel

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Section: Water Odour Migration and Habitat Selectionmentioning

confidence: 99%

Proximate and Ultimate Control of Eel Continental Dispersal

Édeline

Dufour

Élie

2009

Spawning Migration of the European Eel

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“…Olfaction is highly developed in glass eels (Sola et al 1993), and newly arriving glass eels are able to differentiate between water types-glass eels respond to a "bouquet of odours" (Sorensen 1986;Tosi et al 1990;Sola 1995) with those of decaying leaves being highly attractive, whereas odours from their conspecifics are only weakly attractive (Sorensen 1986). That these odours are consistently attractive has been proven by cross-tests of glass eels from different locations (Miles 1968).…”

Section: Species Compositionmentioning

confidence: 99%

Seasonal arrival patterns of juvenile freshwater eels(Anguillaspp.) in New Zealand

Jellyman¹,

Chisnall

Bonnett

et al. 1999

New Zealand Journal of Marine and Freshwater Research

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The arrival season of glass eels of both New Zealand species of freshwater eel, the shortfinned eel (Anguilla australis (Richardson)) and the longfmned eel (A. dieffenbachii (Gray)), was studied by electric fishing of 13 streams/rivers throughout east and west coasts of both North and South Islands at 14-day intervals. Sites were usually located at the most downstream riffle exposed at low tide, and sampled by single-pass electro fishing. The species composition was dominated by shortfins, with exceptions being west coast sites, one in the North Island and two in the South Island. From a comparison of species proportions in adjacent catchments, it was concluded that glass eels make choices about entry in particular water-types. As the stage of pigmentation advanced during the arrival season, "early stage" glass eels were defined and densities of these compared to show seasonal arrival patterns- M98073

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“…Vertical movements in the water column are cued by an internal circatidal clock, the rhythm of which is controlled by flow reversals (Wippelhauser & McCleave 1988). During STST, glass eels also orientate towards the mouth of rivers and up-estuary following olfactory cues from river waters (Sorensen 1986, Tosi & Sola 1993, Sola 1995. Larval feeding activity stops at the onset of metamorphosis (Schmidt 1909), and is resumed and conditioned at the glass eel stage by the acquisition of a new set of teeth and physiological development of the gut (Elie 1979, Tesch 2003.…”

Section: Introductionmentioning

confidence: 99%

Role of glass eel salinity preference in the control of habitat selection and growth plasticity in Anguilla anguilla

Édeline¹,

Dufour²,

Élie³

2005

Mar. Ecol. Prog. Ser.

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Eels colonize either marine, estuarine or freshwater habitats, with marine and estuarine eels tending to grow faster than freshwater eels. The reasons for these divergent migratory tactics and growth trajectories remain poorly understood. In order to investigate the role of salinity preferences of glass eels in the control of habitat selection and growth plasticity, we sorted different contingents of glass eels Anguilla anguilla through 2 consecutive salinity preference tests. This allowed us to study the link between salinity preference and locomotor activity (i.e. positive rheotaxis), and to distinguish contingents of glass eels that were either plastic or fixed in their preference for freshwater (FW) or saltwater (SW). Subsequently, we monitored somatic growth of the different contingents in controlled SW and FW rearing conditions. Preference for FW was linked to high locomotor activity, a behavioral pattern likely to promote colonization of FW habitats in the wild. Accordingly, FWC (FW contingent, i.e. glass eels that preferred FW twice) exhibited poor growth, similar to those observed in wild FW eel populations. In contrast, preference for SW was linked to low locomotor activity, and the SWC (SW contingent, i.e. glass eels that preferred SW twice) had high growth rates in SW, as observed in wild marine and estuarine populations. The PCC (plastic contingent, i.e. glass eels that swappped their salinity preference) had an intermediary growth status that could be related to the 'nomad' life style of eels migrating between different habitat types during their life. Growth was significantly higher in SW compared to FW in all contingents, indicating that habitat salinity may directly affect growth, irrespective of food availability. Our results demonstrated that glass eel salinity preference was linked to their locomotor activity and growth performance, and provided a comprehensive ecological mechanism for the control of habitat distribution and growth patterns observed in wild eel populations.

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Chemoattraction of upstream migrating glass eelsAnguilla anguilla to earthy and green odorants

Cited by 41 publications

References 26 publications

Proximate and Ultimate Control of Eel Continental Dispersal

Proximate and Ultimate Control of Eel Continental Dispersal

Seasonal arrival patterns of juvenile freshwater eels(Anguillaspp.) in New Zealand

Role of glass eel salinity preference in the control of habitat selection and growth plasticity in Anguilla anguilla

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