An Analysis of Techniques Used in Estimating Fish Populations in Streams, with Particular Reference to Large Non-Trout Streams

Cleary, Robert E.; Greenbank, John

doi:10.2307/3797081

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…Sampling effectiveness varies with species of fish (Larimore 1961), size of fish (Jung and Libosvarsky 1965), visibility and flow conditions (Paloumpis 1958), habitat structure (Gorman and Karr 1978), and a variety of other environmental factors (Cleary andGreenbank 1954, Mahon 1980). Since stations in R1-R3 had little instream cover and a uniform, narrow channel, they were sampled with a minnow drag seine (1.2 x 6 m) with 4.8-mm mesh.…”

Section: Fish Samplingmentioning

confidence: 99%

Fish Community Structure and Function along Two Habitat Gradients in a Headwater Stream

Schlosser¹

1982

Ecological Monographs

596

545

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The stream continuum concept suggests that the physical structure of the stream channel coupled with the hydrological cycle and energy inputs results in a consistent pattern of community structure and function along a stream. I evaluated this concept in a headwater fish community along two physical gradients: upstream to downstream and riffle to pool.Habitat diversity and volume increased from upstream to downstream, and from riffle to pool. Temporal variation in habitat diversity was greater upstream. Upstream, and in riffles, habitat volume tended to vary more with time. Fluctuations in rainfall regime caused annual variation in habitat, especially in volume. Benthic insect density was highest from autumn (October-November) through spring (May-June). Following emergence of adults in late spring, invertebrate densities were low in summer in areas with riparian vegetation, but were not lower where riparian vegetation was absent and stable substrates were present. Along a gradient of substrates from silt-sand to gravel-rock, insect production increased, as indicated by adults and pupae in the drift. Peak resource availability for insectivore-piscivore fishes occurred in late summer and autumn, due to increased abundance of young-of-the-year fish.Pool and raceway-pool habitat guilds and insectivore and insectivore-piscivore trophic guilds contained the largest number of species. Increases in species richness were primarily associated with the addition of deeper habitats. Species richness of the pool insectivore-piscivore guild was especially variable over time. Biomass in shallow areas consisted predominantly of generalized insectivores. In deep, stable habitats, generalized insectivores were replaced as the predominant trophic group by insectivore-piscivores and large benthic insectivores. Immigration of fish occurred in spring and autumn, the periods of highest resource availability. Immigration between midriver and headwater regions primarily involved older age classes (III+), and was associated with changes in flow regime, habitat structure, and seasonal dynamics of the resource base of particular trophic groups. Flow regime and habitat volume appeared to be important factors limiting immigration in autumn, especially in pool species.Habitat diversity (depth, current, and substrate; DCS) was significantly correlated with fish species diversity (FSD). However, considerable variation occurred in the relationship between the two variables, including: (I) FSD decreased in winter in shallow, less diverse habitats due to emigration, and increased in spring due to recolonization; (2) FSD increased in spring and autumn when resource availability increased; (3) FSD was least predictable from DCS in autumn, when flow regimes were low and large numbers of fish recruits were present; and (4) DCS did not predict FSD as accurately in temporally variable upstream areas where large numbers of small fish dominated the community, especially in areas with human disturbance.Young age groups (O-Il) were primarily found in shallow, ...

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Section: Fish Samplingmentioning

confidence: 99%

Fish Community Structure and Function along Two Habitat Gradients in a Headwater Stream

Schlosser¹

1982

Ecological Monographs

596

545

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“…Variation in capture probability (i.e., the proportion of available individuals captured) among sampling methods, environmental conditions, and species hinders our ability to effectively detect changes in stream-fish abundance and assemblage structure. The importance of addressing variable capture probability as a basis for sound management and conservation has long been recognized by stream-fish researchers (e.g., Cleary and Greenbank 1954;Larimore 1961). Despite improved analytical approaches to account for variable capture probability (e.g., Williams et al 2002;MacKenzie et al 2005;Royle et al 2013), catch-per-unit-effort (CPUE) remains the most common metric used to evaluate and monitor stream-fish populations (Gwinn et al 2016).…”

Section: R a F T Introductionmentioning

confidence: 99%

Sampling the stream landscape: improving the applicability of an ecoregion-level capture probability model for stream fishes

Mollenhauer

Mouser

Brewer

2018

Can. J. Fish. Aquat. Sci.

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Temporal and spatial variability in streams result in heterogeneous gear capture probability (i.e., the proportion of available individuals identified) that confounds interpretation of data used to monitor fish abundance. We modeled tow-barge electrofishing capture probability at multiple spatial scales for nine Ozark Highland stream fishes. In addition to fish size, we identified seven reach-scale environmental characteristics associated with variable capture probability: stream discharge, water depth, conductivity, water clarity, emergent vegetation, wetted width–depth ratio, and proportion of riffle habitat. The magnitude of the relationship between capture probability and both discharge and depth varied among stream fishes. We also identified lithological characteristics among stream segments as a coarse-scale source of variable capture probability. The resulting capture probability model can be used to adjust catch data and derive reach-scale absolute abundance estimates across a wide range of sampling conditions with similar effort as used in more traditional fisheries surveys (i.e., catch per unit effort). Adjusting catch data based on variable capture probability improves the comparability of data sets, thus promoting both well-informed conservation and management decisions and advances in stream-fish ecology.

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Quantitive Sampling of Marine Fishes - A Problem in Fish Behavior and Fishing Gear

Allen

1960

Proceedings of the First International Conference on Waste Disposal in the Marine Environment

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An Analysis of Techniques Used in Estimating Fish Populations in Streams, with Particular Reference to Large Non-Trout Streams

Cited by 6 publications

References 29 publications

Fish Community Structure and Function along Two Habitat Gradients in a Headwater Stream

Fish Community Structure and Function along Two Habitat Gradients in a Headwater Stream

Sampling the stream landscape: improving the applicability of an ecoregion-level capture probability model for stream fishes

Quantitive Sampling of Marine Fishes - A Problem in Fish Behavior and Fishing Gear

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