Habitat quality affects the condition of Barbus sclateri in Mediterranean semi-arid streams

We investigated the site level relationships between fish condition and environmental variables in Sclater's barbel, Barbus sclateri, from semi-arid streams in the south-eastern Iberian Peninsula. These freshwater ecosystems are characterized by strong seasonal fluctuations in flow levels (droughts and floods) as a consequence of their irregular hydrological regime on both an annual and pluriannual scale. We analysed the relationships between 11 ecosystem variables [conductivity, oxygen concentration, water temperature, pH, seasonal water flow, dominant substrate, submerged vegetation, QBR (Riparian Ecosystems Quality Index), BMWP' (Spanish version of the Biological Monitoring Working Party), fish refuge index and fish density] and fish condition by comparing mass–length relationships of nine populations of Sclater's barbel located in five sub-basins with different environmental conditions. Fish condition differed between the populations studied and was mainly dependent on the ecological variables related with water flow and, consequently, the physical structure of the streams, which is directly related to substrate and fish refuge.

[1]  M. Herrera,et al.  Age structure, growth and reproduction of Leuciscus pyrenaicus in an intermittent stream in the Guadalquivir river basin, southern Spain , 1995 .

[2]  N. Mundahl.  Heat Death of Fish in Shrinking Stream Pools , 1990 .

[3]  F. J. Oliva-Paterna,et al.  Age, growth and reproduction of Cobitis paludica in a seasonal stream , 2002 .

[4]  Brian R. Murphy,et al.  Evaluation of the Relative Weight (Wr ) Index, with New Applications to Walleye , 1990 .

[5]  M. Soriguer,et al.  Reproductive strategies of two species of cyprinids in a stream with Mediterranean regimen (SW Spain). , 2000 .

[6]  G. Seber.  The estimation of animal abundance and related parameters , 1974 .

[7]  Neil B. Metcalfe,et al.  Effects of an environmental perturbation on the social behaviour and physiological function of brown trout , 2001, Animal Behaviour.

[8]  Calvin Zippin,et al.  The Removal Method of Population Estimation , 1958 .

[9]  T. Bolger,et al.  The selection of suitable indices for the measurement and analysis of fish condition , 1989 .

[10]  Carolina Solà,et al.  QBR [Calidad del Bosque de Ribera]: un indice rapido para la evaluacion de la calidad de los ecosistemas de ribera , 1998 .

[11]  Stephen G. Sutton,et al.  Relationships among Fat Weight, Body Weight, Water Weight, and Condition Factors in Wild Atlantic Salmon Parr , 2000 .

[12]  M. Torralva,et al.  Effect of river regulation on the life‐history patterns of Barbus sclateri in the Segura river basin (south‐east Spain) , 1997 .

[13]  N. P. Fornells,et al.  QBR: un índice rápido para la evaluación de la calidad de los ecosistemas de ribera , 1998 .

[14]  E. Stanley,et al.  Condition, Growth, and Reproductive Styles of Fishes Exposed to Different Environmental Regimes in a Prairie Drainage , 2000, Environmental Biology of Fishes.

[15]  J. Giudicelli,et al.  Caractéristiques abiotiques et hydrobiologiques des eaux courantes méditerranéennes: Avec 1 figure et 1 tableau dans le texte , 1985 .

[16]  I. Schlosser.  Environmental variation, life history attributes, and community structure in stream fishes: Implications for environmental management and assessment , 1990 .

[17]  M. Herrera,et al.  Age, growth and reproduction of the barbel, Barbus sclateri (Günther, 1868), in a first-order stream in southern Spain , 1988 .

[18]  G. Uetz,et al.  Estimating fitness : a comparison of body condition indices , 1996 .

[19]  Benigno Elvira.  Conservation status of endemic freshwater fish in Spain , 1995 .

[20]  C. Granado-Lorencio,et al.  Spawning period and migration of three species of cyprinids in a stream with Mediterranean regimen (SW Spain) , 1992 .

[21]  E. García‐Berthou,et al.  Multivariate analysis of covariance in morphometric studies of the reproductive cycle , 1993 .

[22]  C. Fernández‐Delgado,et al.  The life‐history patterns of Barbus bocagei sclateri (Günther, 1868) in a tributary stream of the Guadalquivir River basin, southern Spain , 1992 .

[23]  A. Vila-Gispert,et al.  Use of the condition of Mediterranean barbel (Barbus meridionalis) to assess habitat quality in stream ecosystems , 2000 .

[24]  M. Herrera,et al.  The age, growth and reproduction of Chondrostoma polylepis willkommi in a seasonal stream in the Guadalquivir River basin (southern Spain) , 1994 .

[25]  M. Herrera,et al.  Age structure, growth and reproduction ofRutilus lemmingii in an intermittent stream of the Guadalquivir river basin, southern Spain , 1995, Hydrobiologia.

[26]  C. Granado-Lorencio,et al.  Seasonal changes in condition, nutrition, gonad maturation and energy content in barbel, Barbus sclateri, inhabiting a fluctuating river , 1997, Environmental Biology of Fishes.

[27]  A. Vila-Gispert,et al.  Mass‐length relationship of Mediterranean barbel as an indicator of environmental status in South‐west European stream ecosystems , 2001 .

[28]  P. Maitland,et al.  Future prospects for the freshwater fish fauna of the north Mediterranean region , 1995 .

[29]  J. M. Hernández.  LA ICTIOFAUNA CONTINENTAL DE LA CUENCA DEL RIO SEGURA. EVOLUCIÓN HISTÓRICA Y ESTADO ACTUAL , 1986 .

[30]  J. Hutchings,et al.  The evolution of alternative mating strategies in variable environments , 1994, Evolutionary Ecology.

[31]  C. Granado-Lorencio,et al.  Seasonal variations in the physiological status and energy content of somatic and reproductive tissues of chub , 1997 .

[32]  J. Dunham,et al.  Incorporating Stream Level Variability into Analyses of Site Level Fish Habitat Relationships: Some Cautionary Examples , 1997 .

[33]  W. J. Matthews,et al.  Spatial and Temporal Patterns in Fish Assemblage Structure of an Intermittent Texas Stream , 1992 .

[34]  W. J. Matthews,et al.  Patterns in Freshwater Fish Ecology , 1998, Springer US.

[35]  P. Jurajda.  Effect of channelization and regulation on fish recruitment in a flood plain river , 1995 .

[36]  E. Balon.  How dams on the River Danube might have caused hybridization and influenced the appearance of a new cyprinid taxon , 2004, Environmental Biology of Fishes.

[37]  I. Schlosser.  Critical landscape attributes that influence fish population dynamics in headwater streams , 1995, Hydrobiologia.

[38]  María Luisa Suárez Alonso,et al.  Aplicación del índice de calidad del bosque de ribera, QBR (Munné et al., 1998) a los cauces fluviales de la cuenca del río Segura , 2000 .

[39]  A. Almodóvar,et al.  Effects of a small hydropower station upon brown trout Salmo trutta L. in the River Hoz Seca (Tagus basin, Spain) one year after regulation , 1999 .

[40]  H. Hawkes,et al.  Biological surveillance of rivers: By J. M. Hellawell, Water Research Centre, Stevenage and Medmenham, 332 pp. 1978. £4.00 , 1979 .