Salinity preference behaviour in<i>Carcinus</i>

Thomas, Nicholas; Lasiak, TA; Naylor, E.

doi:10.1080/10236248109386988

Cited by 30 publications

(19 citation statements)

References 7 publications

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“…The general assumption is that salinities with osmolalities near the osmolality of the blood (isosmotic) minimize the physiological cost of osmoregulation, allowing more energy for other processes, such as growth and reproduction (Lankford & Targett, 1994; Cardona, 2000; Hurst & Conover, 2002). Two different types of salinity preference apparatus have been used: salinity gradient tanks that present a continuum of different salinities (Davenport, 1972; Keiser & Aldrich, 1976; Moser, 1988; Chung, 2001) and salinity choice chambers with pre‐established salinities which appear to work well for crustaceans (Thomas et al , 1981; McGaw & Naylor, 1992 a , b ; McGaw, 2001). The main limitation of both of these experimental set‐ups is that they often require a very shallow depth to prevent vertical stratification, thus precluding the testing of relatively large, mobile organisms, such as L. griseus .…”

Section: Introductionmentioning

confidence: 99%

Salinity selection and preference of the grey snapper Lutjanus griseus: field and laboratory observations

Serrano

Grosell

Serafy

2010

Journal of Fish Biology

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Field observations were supplemented with laboratory experiments to reveal patterns of salinity selection and preference for grey snapper Lutjanus griseus (c. 21 cm total length, L(T)), an ecologically and economically important species in the south-eastern U.S.A. Fish abundance data were examined from a long-term field survey conducted in the mangrove habitats of Biscayne Bay, Florida, where salinities ranged from <1 to 40. First, regression analyses indicated significant, positive linear relationships with salinity for both L. griseus frequency of occurrence and concentration (density when present). These patterns are inconsistent with physiological expectations of minimizing energetic osmoregulatory costs. Next, the salinity preference and swimming activity of 11 L. griseus (ranging from 18 to 23 cm L(T)) were investigated using a newly developed electronic shuttlebox system. In the laboratory, fish preferred intermediate salinities in the range of 9-23. Swimming activity (measured in terms of spontaneous swimming speed) followed a parabolic relationship with salinity, with reduced activity at salinity extremes perhaps reflecting compensation for higher osmoregulatory costs. It is suspected that the basis of the discrepancy between laboratory and field observations for size classes at or near maturity ultimately relates to the reproductive imperative to move towards offshore (high-salinity) coral-reef habitats, a necessity that probably overrides the strategy of minimizing osmoregulatory energetic costs.

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Section: Introductionmentioning

confidence: 99%

Salinity selection and preference of the grey snapper Lutjanus griseus: field and laboratory observations

Serrano

Grosell

Serafy

2010

Journal of Fish Biology

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“…There are marked halokinetic responses to reduce salinity, whether applied suddenly (Taylor and Naylor, 1977;Thomas et al, 1981) or sinusoidally (Bolt and Naylor, 1985), and such responses appear to be purely exogenous. In contrast, The phase relation of the activity peaks to the salinity cycle of a, crabs exposed to a salinity cycle with low salinity timed to coincide with expected high tide, (data from Figure 4).…”

Section: Discussionmentioning

confidence: 93%

“…There is evidence to support the hypothesis that rhythmic activity in Carcinus is modulated by the release of a peptidic neurodepressing hormone (NDH) from the eyestalk neurosecretory complex , but previous attempts to test that hypothesis have studied the effects of tissue ablation only on the persistence or absence of endogenous rhythmicity. Now, in view of the complexity of the responses of Carcinus to salinity cycles (Taylor and Naylor, 1977, Thomas et al, 1981, Bolt and Naylor, 1985, it is of particular interest to make a comparative study of the effects of eyestalk ablation on the exogenous and endogenous aspects of the crab's locomotor rhythm.…”

Section: Introductionmentioning

confidence: 99%

Entrainability by salinity cycles of rhythmic locomotor activity in normal and eyestalk ablatedcarcinus maenas(L).

Bolt

Naylor

1986

Marine Behaviour and Physiology

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The temporal patterns of spontaneous locomotor activity were compared in normal and eyestalk ablated crabs. Study of entrainment of such patterns to simulate tidal cycles of salinity change entails separation of the exogenous responses to low salinity and endogenous circatidal rhythmicity which is re-phased by episodes of normal ambient salinity. A method to transform rhythmic data to emphasise separate rhythmic patterns of behaviour was therefore developed, and patterns of reentrainment to ambient salinity cues were established.Having established the normal pattern of entrainment, experiments were then carried out on eyestalk-ablated crabs. In such animals it was found that the exogenous responses to low salinity episodes of imposed salinity cycles were not affected but the entrainment responses to ambient salinity episodes were lost. In addition, eyestalkless crabs, unlike controls, showed no evidence of free-running endogenous rhythmicity after entrainment in a salinity cycle.

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“…Green crabs in an estuary appear to become habituated to episodes of falling salinity, crabs retained in the estuary clearly exhibiting tidal and daily rhythmic locomotor patterns as though they were on the open shore, with no apparent mechanism to induce escape. This initial high halokinesis (Taylor & Naylor, 1977), presumed to enable the crabs to avoid adverse salinities (Thomas et al, 1981;Ameyaw-Akumfi & Naylor, 1987), would also account for differences in choice behaviour between the red and green crabs (McGaw & Naylor, in press). Exposure to constant low salinity in winter has been shown in Carcinus to induce a locomotor rhythm of circatidal periodicity (Bolt & Naylor, 1985;.…”

Section: Discussionmentioning

confidence: 99%

Distribution and rhythmic locomotor patterns of estuarine and open-shore populations ofCarcinus maenas

McGaw¹,

Naylor²

1992

J. Mar. Biol. Ass.

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Populations of Carcinus maenas (Crustacea: Decapoda) from an estuary and from the open shore were compared for salinity tolerance and rhythmic locomotor activity. Estuarine crabs were shown to be predominantly green; red and orange individuals were rare within the estuary in contrast to the open shore. Red crabs were less able to tolerate prolonged exposure to low salinity than green crabs. Spontaneous circatidal rhythms of locomotor activity were similar in red and green forms, but red crabs from the open shore reacted earlier, and were more active upon salinity reduction, than green crabs from the estuary which also showed rapid habituation to episodes of salinity change.

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Salinity preference behaviour inCarcinus

Cited by 30 publications

References 7 publications

Salinity selection and preference of the grey snapper Lutjanus griseus: field and laboratory observations

Salinity selection and preference of the grey snapper Lutjanus griseus: field and laboratory observations

Entrainability by salinity cycles of rhythmic locomotor activity in normal and eyestalk ablatedcarcinus maenas(L).

Distribution and rhythmic locomotor patterns of estuarine and open-shore populations ofCarcinus maenas

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