The autecology of the chub, <i>Squalius cephalus</i> (L.), of the River Lugg and the Afon Llynfi

Hellawell, J. M.

doi:10.1111/j.1365-2427.1971.tb01545.x

Cited by 29 publications

(19 citation statements)

References 6 publications

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“…With the Cyprinidae, it is difficult to estimate accurately the age of fish older than ten years, since erosion on the scales can be extensive and may mask certain annuli (Philippart 1972). Various authors have shown that female chub often have a faster growth rate than males of VI -VU years old (Cragg Hine & Jones 1969, Hellawell 1971, Mann 1976. During the present study, the specimens were released into the water after taking of scales, and therefore, their sex could not be determined.…”

Section: Sampling Methodsmentioning

confidence: 64%

“…The highest growth rate is found in stations 4D and 6V. In stations ID and 3D, growth is very similar, at least up to eight years, and may be compared with those on the English river Lugg (Hellawell 1971). At station 2D, the values are lower and similar to those reported by Libowarsky (1956) for the Suratka (Czechoslovakia), a river that has been disturbed by the construction of a hydroelectric dam and by Philippart (1972) for the Belgian Berwine, a severely polluted river.…”

Section: Discussionmentioning

confidence: 88%

“…Fork lengths were measured with an accuracy of 0.5cm and a sample of scales was taken behind the dorsal fin, outside the lateral line (Vibert & Lagler 1961), between December 1994 and March 1995 at each station. The determination of age was achieved by scalimetric method (Libovsvarsky 1956, Balon 1962, Penaz 1968, Cragg Hine & Jones 1969, Hellawell 1971, Philippart 1972, Mann 1976. With the Cyprinidae, it is difficult to estimate accurately the age of fish older than ten years, since erosion on the scales can be extensive and may mask certain annuli (Philippart 1972).…”

Section: Sampling Methodsmentioning

confidence: 99%

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Influence of environmental variables on the growth ofLeuciscus cephalus(Linnaeus 1766), in the River Durance, South-east France

Bouchard¹,

Chappaz²,

Cavalli³

et al. 1998

Ann. Limnol. - Int. J. Lim.

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The chub, Leuciscus cephalus, colonizes the Durance river from its confluence with the Rhône river (alt. 13 m) up to the Serre Ponçon dam (alt. 780 m.). The Durance has been exposed to strong human pressure, notably dam construction, reduction of flow rate and perturbation of the natural zonation patterns. The linear growth of chub was studied by scale measurement at six stations in the Durance catchment area : two of which are located in its main tributaries, the Buech river and the Verdon. An analysis (ANOVA) of the mean size of fish from one to five years of age shows significant differences between the stations. Principal Component Analysis, in which the stations are characterized by eight nosological variables associated with the density of invertebrates and the number of degree-days above 12° and 22°C established a correlation between chub growth and species habitat, defined in terms of current flow rate, depth and substrate type and temperature. This correlation could be explained in two ways : 1-in slow-flowing homogenous riffle zone, the low water depth and absence of shelters limit the diversity of habitats and the biological richness; nevertheless the abundance of invertebrates does not seem to play an important role ; 2 -in zone of slow flowing riffles subjected to large daily and seasonal variations in water temperature, as in this mediterranean river, temperature might be quite high. Fish older than two years, therefore prefer zones of deep water, where the thermic inertia is stronger. Influences des variables

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Section: Sampling Methodsmentioning

confidence: 64%

Section: Discussionmentioning

confidence: 88%

Section: Sampling Methodsmentioning

confidence: 99%

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Influence of environmental variables on the growth ofLeuciscus cephalus(Linnaeus 1766), in the River Durance, South-east France

Bouchard¹,

Chappaz²,

Cavalli³

et al. 1998

Ann. Limnol. - Int. J. Lim.

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“…Several studies have demonstrated that temperature controls many biochemical processes of metabolic rate (Gillooly et al, 2001;Brown et al, 2004) and that a warmed temperature leads to an increase in basal and active metabolic rate as well as rates at which energy reserves are used by ectothermic organisms (Kassahn et al, 2009). Increases in the rate of physiological processes enable to raise fish activity among which locomotor (Lo´pez-Olmeda and Sa´nchez-Va´zquez, 2011) and foraging (Hathaway, 1927;Hellawell, 1971) activities.…”

Section: Discussionmentioning

confidence: 99%

“…B. barbatula buries in sediment for refuge and forages by sucking in large amounts of sediment, extracting a wide variety of small benthic invertebrates and plants, and releasing the sediment (Keith et al, 2011). P. toxostoma feeds mainly by grazing on benthic algae, diatoms and invertebrates (Chappaz et al, 1989;Keith et al, 2011), whereas S. cephalus is an opportunistic feeder eating both pelagic and benthic material (Hellawell, 1971;Keith et al, 2011). Both P. toxostoma and S. cephalus are also able to displace sediments when moving close to the streambed (see Statzner and Sagnes, 2008 for other cyprinid species; personal observation).…”

Section: Fish Speciesmentioning

confidence: 99%

Influence of temperature on surface sediment disturbance by freshwater fish: a microcosm experiment

Canal

Laffaille

Gilbert

et al. 2015

Ann. Limnol. - Int. J. Lim.

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-Water temperature is a key parameter that regulates activities of ectotherms (e.g., fish) and has been projected to rise in the future in the context of climate change. Surface sediment disturbance (SSD) is an important function performed by fish that modifies benthic habitat properties and may thus influence ecosystem functioning. However, the link between SSD by fish and temperature remains unexplored. In this study, we experimentally assessed the influence of two contrasted temperatures (10 versus 20 xC) on SSD by three freshwater fish species in aquaria. After 10 days, the total surface disturbed by the species was approximately 2-3 times higher at warm than at cold temperature but the number and area of patches disturbed by the species were not significantly different. The stone loach Barbatula barbatula, a benthic fish species, had a higher SSD activity (i.e., total surface disturbed, number and size of patches disturbed) both at cold and warm temperatures than two cyprinid species, chub Squalius cephalus and sofie Parachondrostoma toxostoma. On average, SSD by B. barbatula resulted in approximately two and three more patches than the cyprinid species at 10 and 20 xC, respectively, and the mean patch area disturbed by B. barbatula was about two times larger than the ones disturbed by the cyprinid species. The total surface disturbed by the cyprinids at warm temperature was roughly equivalent to the surface disturbed by B. barbatula at cold temperature. Our results thus suggest that SSD by fish could increase in future warmed conditions.

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Fish populations of a small lowland channelized river in England subject to long‐term river maintenance and management works

Swales

1988

Regul. Rivers: Res. Mgmt.

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Fish populations in the River Perry, a small lowland channelized river in England, were affected by long-term river maintenance and improvement works. Habitat diversity at two 'old channelized' sites was low compared with a downstream 'partially channelized' site and an unmodified site, wh,ere natural river features such as the pool-riffle pattern were more apparent. The fish community was low in diversity at all sites, with two running-water cyprinids, dace Leuciscus leuciscus (L.) and chub Leuciscus cephalm (L.), being the dominant fish species. Relative species composition varied between sites, with dace predominating at the 'old channelized' sites and chub increasingly dominant at the 'partially channelized' and unmodified sites. Population density and biomass estimates of dace were similar a t all sites, but chub were up three times more abundant at the 'partially channelized' and unmodified sites than at the 'old channelized' sites. Populations of dace and chub at the 'old channelized' sites contained a higher proportion of small fish than populations at the downstream sites, which exhibited a more balanced population structure. The growth rates of both dace and chub varied between sites. Low recaptures of marked dace suggested a highly mobile movement pattern while higher recapture rates of chub, particularly at the 'partially channelized' and unmodified sites, seemed t o indicate a more sedentary activity pattern. The conclusion of the study is that long-term river maintenance and management works may delay the morphological and biological recovery of lowland channelized rivers.

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The autecology of the chub, Squalius cephalus (L.), of the River Lugg and the Afon Llynfi

Cited by 29 publications

References 6 publications

Influence of environmental variables on the growth ofLeuciscus cephalus(Linnaeus 1766), in the River Durance, South-east France

Influence of environmental variables on the growth ofLeuciscus cephalus(Linnaeus 1766), in the River Durance, South-east France

Influence of temperature on surface sediment disturbance by freshwater fish: a microcosm experiment

Fish populations of a small lowland channelized river in England subject to long‐term river maintenance and management works

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