Thermal related variations of seasonal and daily spawning periodicity in Barbus barbus

Baras, Étienne

doi:10.1111/j.1095-8649.1995.tb01617.x

Cited by 17 publications

(19 citation statements)

References 6 publications

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“…This distinct activity pattern, with a peak of activity at twilight, has been observed previously in several species (red morrow, Cheilodactylus fuscus, Lowry and Suthers, 1998; the seabass, Dicentrarchus labrax, Bégout and Lagardère, 1995;Bégout-Anras et al, 1997;Bégout-Anras and Lagardère 1998; the brown trout Salmo trutta, Ovidio et al, 1998Ovidio et al, , 2002. Nocturnal and crepuscular activity was usually suggested to be a response to reduced predation risk (Heggens et al, 1993;Jonsson and Jonsson, 1993), an adaptation to prey availability, or optimal foraging strategy in relation to the water temperature (Baras, 1995). For S. salpa, it would be necessary to track more individuals in different seasons to interpret this particular behaviour pattern.…”

Section: Discussionmentioning

confidence: 99%

Diel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)

Jadot

Ovidio

Voss

2002

Aquatic Living Resources

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In the Mediterranean Sea, the fish Sarpa salpa (Sparidae) is the only vertebrate grazer of Posidonia oceanica meadows. In order to gain knowledge about the behaviour of S. salpa and a better understanding of the meadow's primary production recycling, an original study was designed using ultrasonic telemetry to investigate activity patterns and space utilisation in the field. During June-September 2000, we compared diel movements of six adult S. salpa (249-317 mm FL and 313-633 g) in the Bay of Calvi. These fish were tagged by intraperitoneal insertion of ultrasonic transmitters. Their positions were recorded with a directional hydrophone from a small boat with an accuracy between 10 and 50 m, depending on the local environment. The tracking duration ranged from 3 to 22 days (average 11.8 ± 7.3). Locations were performed from at least dawn to dusk or early night, and one fish was tracked during the entire 24-h cycle. Fish were more mobile during the twilight periods, but statistical analysis indicated individual differences for the precise period of mobility. Two major behavioural patterns were observed: first, the fish remained in close vicinity of the harbour during the day and moved away to the north or the south at dusk to access nocturnal sites, occupying a home range of about 4.3 ha. The second behavioural pattern involved persistent occupation of the same sites during day and night within a relatively restricted home range (about 0.8 ha). Great variation in mobility was found and the same individual fish could show both kinds of behaviour. © 2002 Ifremer/CNRS/Inra/IRD/Cemagref/Éditions scientifiques et médicales Elsevier SAS. All rights reserved. RésuméRythmes d'activité de Sarpa salpa (Sparidés) dans un herbier de Posidonia oceanica : étude par télémétrie acoustique en mer Méditerranée, Corse. En Méditerranée, la saupe (S. salpa) est le seul poisson brouteur de l'herbier à P. oceanica. Améliorer nos connaissances sur le comportement de S. salpa permet une meilleure compréhension du recyclage de la production primaire de l'herbier. De juin à septembre 2000, 6 saupes (249-317 mm FL et 313-633 g) capturées dans la baie de Calvi, proche du port de Stareso ont été équipées d'un émetteur à ultrason par une insertion péritonéale et leurs positions ont été enregistrées avec un hydrophone directionnel à bord d'un bateau, avec une précision de 10 à 50 m, en fonction de l'environnement local. Les poissons ont été suivis de 3 à 22 j (moyenne 11,8 ± 7,3 j) et ont été localisés en continu depuis l'aube jusqu'au crépuscule ou au début de la nuit. Un individu a été localisé sur un cycle complet de 24 h. Les individus suivis semblent en général plus mobiles durant l'aube et le crépuscule, même si des différences individuelles ont été observées. Deux principaux types de comportements ont été constatés : (1) la saupe reste à proximité du port durant le jour et se déplace ensuite au crépuscule vers le Nord ou le Sud et occupe des espaces vitaux qui peuvent s'étendre jusqu'à 4,3 ha, (2) le comportement correspond à un...

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Section: Discussionmentioning

confidence: 99%

Diel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)

Jadot

Ovidio

Voss

2002

Aquatic Living Resources

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“…It has been suggested that the circadian clock of freshwater fish shows more plasticity than its marine counterpart, which implies that freshwater fish might modify their activity pattern, even changing their nocturnal behavior to diurnal if needed and vice versa (Helfman, 1981;Cook and Bergersen, 1988;Baras, 1995;Naruse and Oishi, 1996). However, recent studies have concluded that circadian activity rhythms in tench are driven by an internal circadian clock, which is, however, strongly influenced by light.…”

Section: Introductionmentioning

confidence: 99%

Influence of Light Intensity on Plasma Melatonin and Locomotor Activity Rhythms in Tench

Vera

López‐Olmeda

Bayarri

et al. 2005

Chronobiology International

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Melatonin production by the pineal organ is influenced by light intensity, as has been described in most vertebrate species, in which melatonin is considered a synchronizer of circadian rhythms. In tench, strict nocturnal activity rhythms have been described, although the role of melatonin has not been clarified. In this study we investigated daily activity and melatonin rhythms under 12:12 light-dark (LD) conditions with two different light intensities (58.6 and 1091 microW/cm2), and the effect of I h broad spectrum white light pulses of different intensities (3.3, 5.3, 10.5, 1091.4 microW/cm2) applied at middarkness (MD) on nocturnal circulating melatonin. The results showed that plasma melatonin in tench under LD 12:12 and high light conditions displayed rhythmic variation, where values at MD (255.8 +/- 65.9 pg/ml) were higher than at midlight (ML) (70.7 +/- 31.9 pg/ml). Such a difference between MD and ML values was reduced in animals exposed to LD 12: 12 and low light intensity. The application of 1 h light pulses at MD lowered plasma melatonin to 111.6 +/- 3.2 pg/ml (in the 3.3-10.5 microW/cm2 range) and to 61.8 +/- 18.3 pg/ml (with the 1091.4 microW/cm2 light pulse) and totally suppressed nocturnal locomotor activity. These results show that melatonin rhythms persisted in tench exposed to low light intensity although the amplitude of the rhythm is affected. In addition, it was observed that light pulses applied at MD affected plasma melatonin content and locomotor activity. Such a low threshold suggests that the melatonin system is capable of transducing light even under dim conditions, which may be used by this nocturnal fish to synchronize to weak night light signals (e.g., moonlight cycles).

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“…Around Lake Tana, rains usually start late in the afternoon causing a fast rise in the tributaries' water level which has decreased again the following morning. This probably explains why Lake Tana labeobarbs are nocturnal spawners, unlike other barbs (e.g., Barbus barbus, Baras, 1995). The lower risk of predation in shallow waters during the night (Dgebuadze et al, 1999) might also be involved.…”

Section: Migrationmentioning

confidence: 99%

Riverine spawning and reproductive segregation in a lacustrine cyprinid species flock, facilitated by homing?

Palstra¹,

Graaf²,

Sibbing³

2004

Animal Biol

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This paper aims at assessing the reproductive segregation within the endemic Barbus (renamed Labeobarbus) species flock of Lake Tana (Ethiopia). Migration, followed by temporal and spatial reproductive segregation in the upstream tributaries of two inflowing rivers was studied systematically over the 1999 and 2000 spawning seasons. Physical events that may trigger lacustrine migration and characterise suitability of spawning grounds were analysed. Six species migrate 30-40 km upstream Gumara River during declining flow, just after the rainy season. Spawning occurs in the well-oxygenated gravel beds of four Gumara tributaries. Eight 'large barb' species were absent from the rivers, or found only incidentally, thus segregating them at a macro-spatial scale from the six river-spawners. The missing species spawn either in the lake or in other rivers not sampled. Long distance migration and species-specific spawning sites suggest that homing may have facilitated reproductive isolation and speciation. A fine-tuning between homing and gonad development is suggested since females reach spawning maturity only as they arrive at the spawning grounds. This study provides convincing evidence for reproductive segregation, and contributes in unravelling the evolution of this unique Labeobarbus species flock. Collective migration and riverine spawning of six Labeobarbus species makes them very vulnerable for overfishing at the spawning areas.

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Thermal related variations of seasonal and daily spawning periodicity in Barbus barbus

Abstract: In 1993, nocturnal spawning activities were observed in the diurnal spawning cyprinid Barbus barbus. This behaviour is interpreted as a response to exceptionally high daily thermal amplitudes, regarded as the sign of an unpredictable environment.

Cited by 17 publications

References 6 publications

Diel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)

Diel activity of Sarpa salpa (Sparidae) by ultrasonic telemetry in a Posidonia oceanica meadow of Corsica (Mediterranean Sea)

Influence of Light Intensity on Plasma Melatonin and Locomotor Activity Rhythms in Tench

Riverine spawning and reproductive segregation in a lacustrine cyprinid species flock, facilitated by homing?

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