Seasonal activities of female barbel<i>Barbus barbus</i>(L.) in the River Ourthe (Southern Belgium), as revealed by radio tracking

Baras, Étienne; Cherry, Benoît

doi:10.1051/alr:1990029

Cited by 47 publications

(54 citation statements)

References 18 publications

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“…Samples were named according to their location and, within each location, were ranked by decreasing sizes, for example, Fréchoux1, Fréchoux2, etc. Samples from the different seasons taken at a particular location may not be comparable because (i) concerted population movements have previously been inferred from significant temporal variations in introgression (Chenuil et al, 2000) and (ii) migrations for reproduction are suspected in this hybrid zone (unpublished field and microsatellite data from spawning individuals) and were proven for B. barbus in other rivers (Hunt and Jones, 1974;Baras and Cherry, 1990;Lucas and Batley, 1996). Therefore, despite small female sample sizes, we were unable to analyse larger samples by pooling different dates for each location.…”

Section: Samples and Locationsmentioning

confidence: 99%

“…We investigate whether or not there are any differences at these loci between the sexes. We expected to find such differences because (i) an experimental cross between B. barbus and B. meridionalis (Philippart and Berrebi, 1990) revealed that hybrid dysgenesis (ie endogenous selection, independent of environment and attributed to the rupture of coadapted gene complexes) strongly varies among sexes, and (ii) there is direct evidence that dispersal patterns are different between male and female barbel (Baras and Cherry, 1990). …”

Section: Introductionmentioning

confidence: 99%

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Autosomal differences between males and females in hybrid zones: a first report from Barbus barbus and Barbus meridionalis (Cyprinidae)

Chenuil

Crespin

Pouyaud³

et al. 2004

Heredity

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International audienceNarrow hybrid zones are generally subjected to the action of two forces: dispersal, which tends to homogenise the hybridising taxa, and selection against hybrids, which, in contrast, produces steep clines of introgression for diagnostic markers. Although differences between sexes in dispersal abilities or in susceptibility to hybrid counterselection are common in hybrid zones, autosomal genetic differences between males and females have never been reported to our knowledge. Barbus barbus and Barbus meridionalis (Cyprinidae) form a hybrid zone along the Lergue river. By carrying out a genetic analysis of males and females in six samples from two central stations of the hybrid zone using codominant markers (six allozymes and four microsatellite loci), we revealed significant multilocus and monolocus differences between the sexes. This could reflect a genetic difference among sexes within a same cohort, caused either by a survival (or fertility) differential among sexes or by a sex-specific pattern of dispersal. Alternatively, this may be due to genetic differentiation between cohorts, since male and female barbel exhibit different maturation, growth and survival patterns leading to different age distributions among sexes, and particularly among reproducers

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Section: Samples and Locationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Autosomal differences between males and females in hybrid zones: a first report from Barbus barbus and Barbus meridionalis (Cyprinidae)

Chenuil

Crespin

Pouyaud³

et al. 2004

Heredity

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show abstract

“…For the common barbel (Barbus barbus) and nase (Chondrostoma nasus), which move between their resting habitats and feeding habitats on a daily basis (Baras 1997), as well as move seasonally to upstream spawning habitats (Baras & Cherry 1990;Huber & Kirchhofer 1998;Ovidio & Philippart 2008), habitat complementation is an important consideration. Indeed, numbers of these gregarious species in human-impacted rivers are dwindling, due in no small part to insufficient and unreachable spawning and nursery habitats (Maier 1997;Bo€ et et al 1999;Penczak & Kruk 2000).…”

Section: Introductionmentioning

confidence: 99%

Using a continuous riverscape survey to examine the effects of the spatial structure of functional habitats on fish distribution

Pichon¹,

Talès²,

Gorges³

et al. 2015

Journal of Freshwater Ecology

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To fill the gap between microhabitat and landscape scale habitat models for freshwater fish, it is becoming increasingly common practice to adopt a continuous view of riverscapes, thus allowing a better understanding of the processes in place at the river management level (segments of 1À100 km). The aim of this study was to test the effects of the spatial structure of habitat on fish distribution at this scale. Inferred habitat relationships were generated using spatial metrics adapted from landscape ecology. These were calculated for two species of multi-habitat cyprinid fish in a 25-km long segment of the Seine River. A spatially continuous survey was then designed to acquire fish sampling data relating to the riverscape. Explanatory models were devised to quantify the extent to which environmental and spatial variables could describe fish distribution patterns. Spatially continuous sampling of feeding habitats at dawn and dusk provided greater understanding of the spatial distribution of common barbel (Barbus barbus, L.) and nase (Chondrostoma nasus, L.). Fish observations were aggregated longitudinally in neighboring feeding habitat patches, with the highest abundance found in patches with the best local conditions. The species were present for large feeding patches, as well as for a higher proximity index for those patches. This result emphasized the importance of the supplementation of feeding habitats. By quantifying spatial habitat relationships using spatial metrics, it was possible to identify the best suited configuration of functional habitats to the needs of shoals. At present, most conservation work focuses on restoring local habitats. There is also growing interest in large-scale fish management, which has been encouraged by the advent of metapopulation theory. This study highlights the need for greater work at a third, intermediate scale that is no less significant: restoring daily and seasonal movements between functional habitats.

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“…Temporal variations in the migration rate of fish in rivers (Godoy, 1959(Godoy, , 1967(Godoy, , 1975Bonetto & Pignalberi, 1964;Bonetto et al, 1971;Petrere Jr., 1985;Quirós, 1988;Agostinho et al, 1993) and in fish ladders (Malmqvist, 1980;Baras & Cherry, 1990;Mallen-Cooper, 1999), and the accumulation of migrating fish immediately downstream from the barrier to migration are well documented (Mallen-Cooper, 1999;Taylor et al, 2001;Gehrke et al, 2002, among many others). However, studies of the motivations that lead neotropical species to ascend passage mechanisms are rare (Capeleti & Petrere Jr., 2006;Pompeu & Martinez, 2006).…”

Section: Introductionmentioning

confidence: 99%

Movements through a fish ladder: temporal patterns and motivations to move upstream

et al. 2007

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Fish passages are constructed with the aim of reestablishing connectivity between critical habitats, in order to sustain those species that move over a large area during their lives. The upstream movements of most of the known migratory species are made for purposes of reproduction (adults) or dispersal (juveniles). The present study was conducted at the ladder constructed at Lajeado Dam (Luis Eduardo Magalhães Hydroelectric Power), on the Tocantins River. The objective was to assess whether there is a temporal pattern in the abundance of fish below the dam and in the ladder, that correlates with their breeding seasons. Additionally, it was examined whether reproduction is the predominant motivation of the shoals of fish that ascend the ladder. Samples were taken monthly from November, 2002 through October, 2003, downriver from the dam with gillnets, and in the resting pools of the fish ladder with cast nets. The analysis of seasonality in the aggregation of the shoals was based on the temporal variations in abundance and species richness. The possibility of a reproductive motivation for ascending the ladder was inferred from the frequency of the stages of gonadal development. However, during the entire study period we observed a high frequency of individuals with gonads in the pre-vitellogenic stage for all analyzed species, both downriver from the dam (97%) and in the fish ladder (98%). These findings suggest that there was no reproductive motivation for the aggregation of the fish downstream and for their entry into the ladder. On the other hand, the dominance of these stages downriver suggests that the spawning habitats are distant, and that the upstream movements occur for other reasons such as dispersal and search for more appropriate habitats for feeding and growth. The entrance into the ladder resulted more from rheophilic behavior, which is more pronounced in migratory species, than from an endogenous motivation linked to reproductive migration.Os mecanismos de transposição de peixes em barragens visam restabelecer a conectividade entre habitats críticos à manutenção para as espécies que tenham uma ampla área de vida. Os movimentos ascendentes da maioria das espécies migradoras conhecidas são realizados por motivação reprodutiva (adultos) ou dispersiva (juvenis). Neste contexto, o presente estudo tem como objetivo avaliar se existe um padrão temporal na abundância de peixes a jusante da barragem e na escada da UHE Lajeado (UHE Luis Eduardo Magalhães, rio Tocantins) que segue a sazonalidade reprodutiva. Adicionalmente, busca avaliar se reprodução é a motivação predominante dos cardumes que ascendem a escada. Para isto, as amostragens foram realizadas mensalmente de novembro de 2002 a outubro de 2003 a jusante da barragem, com o uso de redes de espera, e nos tanques de descanso da escada, com tarrafas. A análise da sazonalidade na agregação dos cardumes foi baseada nas variações temporais de abundância e riqueza de espécies, enquanto a motivação reprodutiva para a ascensão foi inferida a partir da freqüên...

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Seasonal activities of female barbelBarbus barbus(L.) in the River Ourthe (Southern Belgium), as revealed by radio tracking

Cited by 47 publications

References 18 publications

Autosomal differences between males and females in hybrid zones: a first report from Barbus barbus and Barbus meridionalis (Cyprinidae)

Autosomal differences between males and females in hybrid zones: a first report from Barbus barbus and Barbus meridionalis (Cyprinidae)

Using a continuous riverscape survey to examine the effects of the spatial structure of functional habitats on fish distribution

Movements through a fish ladder: temporal patterns and motivations to move upstream

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