A new tracking system for the measurement of diel locomotor rhythms in the Norway lobster, Nephrops norvegicus (L.)

Aguzzi, Jacopo; Sarriá, David; García, José A.; Rı́o, Joaquı́n Del; Sardà, Francisco; Mànuel, A.

doi:10.1016/j.jneumeth.2008.06.009

Cited by 30 publications

(18 citation statements)

References 40 publications

(37 reference statements)

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“…norvegicus is a nocturnal species showing out of burrow emergence at night time in shallow water depth areas where environmental illumination fits with our experimental conditions (i.e. 10 lx; Aguzzi et al, 2008). Such rhythmicity in the microcosm tank copes with field data on population rhythms by trawling where a single peak in capture is produced at night as result of massive population burrow emergence under darkness (Farmer, 1974;Chapman and Howard, 1979;Aguzzi et al, 2003).…”

Section: Discussionsupporting

confidence: 77%

“…Emergence is also modulated by social interaction in a fashion that is to date not clarified. Doubts on real stock size are reported by comparing field sampling data from trawling with more direct observations on individual behaviour in the laboratory (reviewed by Aguzzi and Sardà, 2008). Under isolating controlled conditions each individual expresses neat locomotor activity.…”

Section: Introductionmentioning

confidence: 99%

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A new morphometric implemented video-image analysis protocol for the study of social modulation in activity rhythms of marine organisms

Menesatti¹,

Aguzzi

Costa³

et al. 2009

Journal of Neuroscience Methods

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Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

A new morphometric implemented video-image analysis protocol for the study of social modulation in activity rhythms of marine organisms

Menesatti¹,

Aguzzi

Costa³

et al. 2009

Journal of Neuroscience Methods

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“…However, chronobiological studies have involved multiple crustacean species and are preferably comparative. Most common are studies on locomotory patterns, which are perhaps best documented for the shore crab Carcinus maenas (7,24,25), crayfish (26), and lobsters (27)(28)(29)(30). For C. maenas and species of commercial value such as Homarus americanus, rhythms related to moulting and reproduction have been well documented (31)(32)(33)(34)(35).…”

Section: Chronobiological Systems In Crustaceamentioning

confidence: 99%

Circadian clocks in crustaceans: identified neuronal and cellular systems

Strauß

Dircksen²

2010

Front Biosci

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Circadian rhythms are known for locomotory and reproductive behaviours, and the functioning of sensory organs, nervous structures, metabolism and developmental processes. The mechanisms and cellular bases of control are mainly inferred from circadian phenomenologies, ablation experiments and pharmacological approaches. Cellular systems for regulation summarised here comprise the retina, the eyestalk neuroendocrine X-organ-sinus gland system, several neuropeptides such as red pigment concentrating, hyperglycaemic and pigment-dispersing hormones, and factors such as serotonin and melatonin. No master clock has been identified, but a model of distributed clockwork involves oscillators such as the retinular cells, neurosecretory systems in the optic lobes, putative brain pacemakers, and the caudal photoreceptor. Extraretinal brain photoreceptors mediate entrainment. Comparative analyses of clock neurons and proteins known from insects may allow the identification of candidate clock neurons in crustaceans as putative homologues in the two taxa. Evidence for the existence of "insect-like" intracellular clock proteins and (light sensitive) transcription factors is scarce, but clock-, period-, and cryptochrome-gene products have been localised in the CNS and other organs rendering further investigations into crustacean clockwork very promising.

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“…This method provides interesting insight into species' biological clock regulation when catches are conducted concomitantly with measurements of physical factors that are key habitat parameters controlling rhythms (e.g. the light or tidal cycles as Zeitgeber; reviewed by Aguzzi et al 2008). However, the field study of biological rhythms has to be supported by observations of the anatomy and functional mechanisms of the sensory capabilities that each species displays (Naylor 2005).…”

Section: Introductionmentioning

confidence: 99%

Sensory constraints in temporal segregation in two species of anglerfish, Lophius budegassa and L. piscatorius

Colmenero¹,

Aguzzi²,

Lombarte³

et al. 2010

Mar. Ecol. Prog. Ser.

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The temporal segregation of 2 ecologically equivalent and sympatric species, the black anglerfish Lophius budegassa and white anglerfish L. piscatorius, was studied in relation to day-night behaviour and the underlying morphological variation in the sensory organs. Temporally scheduled trawl sampling was conducted on the western Mediterranean shelf, and diel fluctuations in catches were used as a proxy of behavioural rhythms. L. budegassa was more abundant at night than L. piscatorius, which mostly occurred in daytime catches. The observed differences in the timing of maximum activity (i.e. catches) were consistent with differences in otolith sagittae weight, eye/lens sizes and optical sensitivity. L. budegassa presented significantly heavier otolith sagittae than L. piscatorius, indicating that the behaviour of the black anglerfish is mostly acoustically driven (a typical characteristic of species living in dim light conditions). Preference for a dim light environment was also confirmed by the high optical sensitivity observed in this species achieved by enlarging the photoreceptors' diameter. In contrast, L. piscatorius showed larger eyes and lenses than L. budegassa, but only in individuals larger than 50 cm. Large eyes usually improve photon capture and the fineness with which the image is sampled; however, relatively low values of sensitivity and resolution were observed in large L. piscatorius. This indicates that a trade-off might exist between the increase in eye size as an adaptive response to the impending deep meso-and bathypelagic life and a visual constraint imposed by the quality of the water at the bottom level where contrast can be degraded by suspended particles. These results indicate that interspecific competition with sympatric and ecologically equivalent species may result in different adaptations to diurnal/nocturnal behaviour, which are sustained by morphological specialisations in sensory organs.

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A new tracking system for the measurement of diel locomotor rhythms in the Norway lobster, Nephrops norvegicus (L.)

Cited by 30 publications

References 40 publications

A new morphometric implemented video-image analysis protocol for the study of social modulation in activity rhythms of marine organisms

A new morphometric implemented video-image analysis protocol for the study of social modulation in activity rhythms of marine organisms

Circadian clocks in crustaceans: identified neuronal and cellular systems

Sensory constraints in temporal segregation in two species of anglerfish, Lophius budegassa and L. piscatorius

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