Seasonal variation of locomotor activity rhythm of<i>Orchestia gammarellus</i>in the supralittoral zone of Ghar Melh lagoon (North-East of Tunisia)

Jelassi, Raja; Ayari, Anas; Nasri–Ammar, Karima

doi:10.1080/09291016.2013.785695

Cited by 22 publications

(9 citation statements)

References 20 publications

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“…Dotted line in actograms represents the activity drift. Bohli et al 2006;Ayari & Nasri-Ammar 2012b), Orchestia gammarellus which is another detritivore species living in sympatry with O. montagui in Menzel Jmil (Jelassi et al 2013a(Jelassi et al , 2013bAyari et al 2015b), Deshayesorchestia deshayesii (Williams 1982(Williams , 1983Ayari & Nasri-Ammar 2012a), O. mediterranea and O. cavimana (Wildish 1970). our results revealed the presence of circadian and ultradian endogenous components in Orchestia montagui, with periods close to 24 and 12 h, respectively.…”

Section: Discussionsupporting

confidence: 57%

“…Talitrid amphipods represent one of the prevailing macrofaunal groups in sandy beaches (Dahl 1946;McLachlan & Jaramillo 1995) and other wetlands (Jelassi et al, 2012, Jelassi et al, 2013a, 2013b. These supralittoral decomposers of biological debris are regarded as a potential bio-indicator of the quality of sandy beaches (Griffiths et al 1983;Ketmaier et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Locomotor behaviour in males, females and groups ofOrchestia montagui(Amphipoda, Talitridae) in the supralittoral zone of Bizerte lagoon

Ayari

Jelassi

Ghemari

et al. 2016

Biological Rhythm Research

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Locomotor activity rhythm of Orchestia montagui was investigated under constant darkness in a population collected in spring from the supralittoral zone of Bizerte lagoon (northern region of Tunisia) at Menzel Jmil in spring. This rhythm was recorded in individual and groups of animal by infrared actography every 20 min by multichannel data loggers, at a constant temperature of 18 ± 0.5 °C. According to double-plotted actograms, wave forms and periodogram analysis, results revealed different locomotor pattern. However, locomotor activity rhythm of males was more stable than females. Furthermore, the mortality was statistically higher in unmixed groups than in mixed groups.

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Section: Discussionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Locomotor behaviour in males, females and groups ofOrchestia montagui(Amphipoda, Talitridae) in the supralittoral zone of Bizerte lagoon

Ayari

Jelassi

Ghemari

et al. 2016

Biological Rhythm Research

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“…Their activity was concentrated during the subjective night. This activity pattern was shown for many species of amphipods such as Orchestia gammarellus (Jelassi et al 2013a(Jelassi et al , 2013b, Deshayesorchestia deshayesii (Williams 1982;Williams 1983;Ayari & Nasri-Ammar 2012b), Orchestia mediterranea and Orchestia cavimana (Wildish 1970). In contrast, activity of Britorchestia brito occurred mainly during the subjective day.…”

Section: Discussionmentioning

confidence: 77%

“…Orchestia gammarellus (Jelassi et al 2013a;Ayari et al 2015), Orchestia mediterranea and Orchestia cavimana (Wildish 1970), Deshayesorchestia deshayesii (Williams 1982(Williams , 1983 Ayari & Nasri-Ammar 2012a), and Talitrus saltator (Williams 1980;Bohli et al 2006;Bregazzi & Naylor 1972;Nasri-Ammar & Morgan 2005a;Ayari & Nasri-Ammar 2012a, 2012b, whereas the tidal estuarine species Corophium volutator showed almost exclusively a semidiurnal tidal pattern (Hölmstrom & Morgan 1983) that in the sand beach amphipod Bathyporeia pelagica is modulated over a circadian period (Fincham 1970a(Fincham , 1970b.…”

Section: Introductionmentioning

confidence: 99%

Endogenous activity rhythm inTalitrus saltator,Britorchestia brito(Crustacea, Amphipoda) andTylos europaeus(Crustacea, Isopoda) from Barkoukech Beach (Tabarka, Tunisia)

Jelassi

Ayari

Nasri–Ammar

2015

Biological Rhythm Research

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The locomotor activity rhythm of three supralittoral crustacean species, Tylos europaeus (terrestrial isopod) and Britorchestia brito and Talitrus saltator (amphipod, Talitridea), was investigated in Barkoukech Beach. The rhythm was monitored in individual animals in spring under continuous darkness and constant temperature.Results revealed that whatever the species, actograms and mean activity curves showed that specimens of Tylos europaeus and Talitrus saltator concentrated their activity during the subjective night; whereas, Britorchestia brito concentrated its activity during the subjective day. The three species exhibited a circadian locomotor rhythm with mean circadian period respectively equal to 24h41'±0h44', 24h46'±0h55' and 25h21'±1h16'.The most stable locomotor rhythm was found in Talitrus saltator (0.444±0.246).Furthermore, individuals of Tylos europaeus were significantly more active (10h47'±2h52') than the two amphipods.Differences in the activity patterns of the three species will be discussed as an adaptative strategy to respond to interspecific competitive interactions.

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“…In Tunisia, amphipod communities inhabiting the supralittoral zone of wetlands, other than sandy beaches (Jelassi and Nasri-Ammar 2013;Jelassi et al 2012;Jelassi et al 2013a), have not received much attention. Thus, aims of this study were to produce a list of amphipod species collected in the supralittoral zones of different lagoons, to estimate species richness, abundance, and density, and we focus on environmental factors that may control their spatial distribution.…”

Section: Introductionmentioning

confidence: 99%

Biodiversity of Talitridae family (Crustacea, Amphipoda) in some Tunisian coastal lagoons

et al. 2015

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Background: Although wetlands were remarkable habitats with their fauna and flora diversity, few studies have been devoted to the study of amphipod distribution in this type of environment. To study both qualitatively and quantitatively amphipod community, surveys were conducted during the spring season in ten coastal lagoons ranging from subhumid to arid bioclimatic stage. At each station, eight quadrats of 50 × 50 cm were randomly placed. Amphipods were preserved in alcohol 70°C. In the laboratory, the specimens collected were identified and counted. Meanwhile, analyses of organic matter, particle size, and heavy metals from the soil taken from each station were made. Results: A total of 1,340 specimens of amphipods were collected, and eight species belonging to Talitridae family were identified. Species richness ranges from one species collected in the supralittoral zone of El Bcherliya (Ghar El Melh lagoon) and eight species in the supralittoral zone of Bizerte lagoon. In this last station, the relative abundance of amphipods was significantly higher (36.04%, N = 483). In addition, the diversity indices of Simpson, Shannon-Weaver, and equitability shows that the highest species diversity characterizes this same station while the community was more balanced in opposite El Boughaz (Ghar El Melh lagoon) (J″ = 0.996). Conclusions: The spatial distribution of different amphipod species depends on edaphic (heavy metals, granulometry, organic matter) and climatic (temperature, humidity) factors.

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Seasonal variation of locomotor activity rhythm ofOrchestia gammarellusin the supralittoral zone of Ghar Melh lagoon (North-East of Tunisia)

Cited by 22 publications

References 20 publications

Locomotor behaviour in males, females and groups ofOrchestia montagui(Amphipoda, Talitridae) in the supralittoral zone of Bizerte lagoon

Locomotor behaviour in males, females and groups ofOrchestia montagui(Amphipoda, Talitridae) in the supralittoral zone of Bizerte lagoon

Endogenous activity rhythm inTalitrus saltator,Britorchestia brito(Crustacea, Amphipoda) andTylos europaeus(Crustacea, Isopoda) from Barkoukech Beach (Tabarka, Tunisia)

Biodiversity of Talitridae family (Crustacea, Amphipoda) in some Tunisian coastal lagoons

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