Comparison of Three Methods for Studies of Stream Habitat Use by Young Brown Trout and Atlantic Salmon

Heggenes, Jan; Brabrand, Åge; Saltveit, S. J.

doi:10.1577/1548-8659(1990)119<0101:cotmfs>2.3.co;2

Cited by 135 publications

(102 citation statements)

References 20 publications

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“…To overcome this bias, a sampling technique using preinstalled anodes (BAIN et al, 1985) that surprise the fish within the cover habitat could be more efficient. Direct underwater observation may underestimate the use of cover in shallow, turbid, or fast-flowing water, in highly structured instream cover, and at low water temperature because fish are difficult to see (HEGGENES et al, 1990). Finally, despite its significant costs radiotelemetry provides a finer degree of spatial and temporal resolution and thus allows to determine the pattern of activity in relation with cover features and to quantify their function (ALLOUCHE et al, 1999).…”

Section: Assessment Of Biological Attributesmentioning

confidence: 99%

Nature and Functions of Cover for Riverine Fish.

Allouche¹

2002

Bull. Fr. Pêche Piscic.

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This review attempts to assess the nature and the role of cover for riverine fish assemblages. Although early identified as a key factor for fish distribution, especially for salmonids, cover (i.e. woody debris, undercut banks, boulders, turbidity...) still remains the variable least considered in the studies of fish habitat relationships. This is mainly due to the diversity of ecological functions of cover structures in fish assemblages. Cover structures are structuring components of fish habitat and contribute to the biological productivity of streams. But, at the individual scale, cover fulfils three main functions: protection against predators, visual isolation reducing competition, and hydraulic shelter. In fact, the use of cover by fish results from a trade-off between the costs and the benefits associated with its use. Although the relationships between fish and cover appear extremely complex and context-specific, a growing body of evidence highlights the potential role of cover for management purposes.Key-words : cover, shelter, riverine fish, fish habitat. NATURE ET FONCTIONS DU COUVERT POUR LES POISSONS LOTIQUES. RÉSUMÉCet article décrit la typologie ainsi que les fonctions du couvert pour les poissons lotiques. Identifié très tôt comme un facteur explicatif de la distribution des poissons, principalement chez les salmonidés, le couvert (i.e. débris ligneux, sous-berges, blocs, turbidité...) demeure néanmoins la variable la moins considérée dans l'étude des relations habitat-poissons. Ceci s'explique notamment par les fonctions écologiques très diverses que le couvert remplit vis-à-vis des assemblages piscicoles. Les structures pourvoyeuses de couvert sont des agents structurants de l'habitat piscicole et contribuent à la productivité biologique des cours d'eau. Au niveau du microhabitat du poisson, le couvert remplit trois fonctions majeures : anti-prédation, isolation visuelle limitant la compétition, et abri hydraulique. En fait, l'utilisation du couvert par les poissons résulte d'un compromis entre les coûts et les bénéfices associés d'où l'extrême complexité de cette relation qui semble plutôt spécifique à un contexte donné. Malgré les difficultés d'extrapolation, de nombreux travaux mettent en évidence la signification écologique ainsi que l'utilisation potentielle du couvert pour une gestion optimale des ressources piscicoles.Mots-clés : couvert, abri, poissons lotiques, habitat piscicole.

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Section: Assessment Of Biological Attributesmentioning

confidence: 99%

Nature and Functions of Cover for Riverine Fish.

Allouche¹

2002

Bull. Fr. Pêche Piscic.

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“…At each point, the water column depth (cm) and mean water velocity (nvs" 1 ) were measured. Also, the percentage of each of six substrate categories (Platts et ai, 1983), cover and shading were visually estimated to the nearest 5%-Cover was defined as any submerged structure beneath which fish could hide from an overhead view as well as undercut banks and overhanging vegetation less than 50 cm above the water surface (Heggenes et al, 1990). The pool/riffle ratio was also estimated at each sampling site.…”

Section: Study Areamentioning

confidence: 99%

Assessment of a brown troutSalmo truttapopulation in the River Gallo (central Spain): Angling effects and management implications (Salmonidae)

Almodóvar¹,

Nicola²

1998

Italian Journal of Zoology

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The brown trout population of the River Gallo (central Spain) was monitored every two months during 1996 to determine the current impact of angling. To evaluate the influence of additional parameters, physical habitat and food availability were also studied. To assess fishing pressure, trout harvest and angling exploitation, a partial creel census was conducted during the 1996 fishing season. Differences were found in densities and biomass between exploited (1182.4 fish ha -1 , 68.3 kg ha -1 ) and unexploited areas, the latter being markedly higher (3135.1 fish ha -1 , 208.2 kg ha -1 ). Production was quite superior in the unexploited area and decreased (from 144.5 kg ha -1 yr -1 to 37.2 kg ha -1 yr -1 ) as fishing pressure increased. However, no consistent differences were observed in growth, condition factor, age diversity, mortality, recruitment age and turnover ratio. Sport fishing seems to be the main negative factor influencing the balance within population of brown trout in the River Gallo and therefore management should be focused on more restrictive angling measures.

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“…Ils sont établis par synthèse bibliographique, enquêtes auprès d'experts ou mesures directes (BOVEE, 1982 ;HEGGENES et al, 1990). Certains auteurs ont proposé des courbes bivariées (HANSON, 1988 ;VOOS et LIFTON, 1988).…”

Section: Introductionunclassified

Simulation de l'habitat physique du barbeau fluviatile (Barbus barbus, L. 1758) : choix des modèles biologiques et sensibilité de la réponse

Pouilly¹,

Souchon²,

Roger³

1994

Bull. Fr. Pêche Piscic.

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Des courbes monovariées et des modèles multivariés de préférence d'habitat du barbeau, Barbus barbus, ont été établis à partir de données récoltées sur 3 cours d'eau. Dans les deux cas (monovarié et multivarié), trois modèles locaux, correspondant aux données d'une rivière, et un modèle général, regroupant l'ensemble des données, ont été établis. La qualité de la prédiction et la sensibilité de la réponse lors de la simulation des capacités d'accueil d'un cours d'eau révèlent : 1) que les modèles multivariés ont une valeur prédictive plus forte que les courbes de préférence, 2) que les modèles construits à partir de jeux de données locaux sont plus performants que les modèles généraux, et 3) que la perte de précision est moindre dans le cas du modèle général multivarié. Mots-clés : Préférences d'habitat, capacités d'accueil, modèles monovariés, modèles multivariés, Barbus barbus. PHYSICAL HABITAT SIMULATION OF BARBEL (BARBUS BARBUS, L. 1758) : SELECTION OF BIOLOGICAL MODELS BASED ON PREDICTABILITY CRITERIA. ABSTRACTHabitat suitability curves and habitat use factorial models were elaborated for Barbus barbus with data from 3 rivers. For the two cases, three local models, issued from data of one river, and one general model, constructed with all the data, were established. The predictive power and the sensitivity of the response showed that : 1) factorial models are better for prediction than monovariate models, 2) the local models were better than general models, and 3) the loss of predictive power was lower for the factorial general model than for the monovariate general model.

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Comparison of Three Methods for Studies of Stream Habitat Use by Young Brown Trout and Atlantic Salmon

Cited by 135 publications

References 20 publications

Nature and Functions of Cover for Riverine Fish.

Nature and Functions of Cover for Riverine Fish.

Assessment of a brown troutSalmo truttapopulation in the River Gallo (central Spain): Angling effects and management implications (Salmonidae)

Simulation de l'habitat physique du barbeau fluviatile (Barbus barbus, L. 1758) : choix des modèles biologiques et sensibilité de la réponse

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