Upper Lethal and Preferred Temperatures of the Slimy Sculpin, <i>Cottus cognatus</i>

Symons, Philip E. K.; Metcalfe, J. L.; Harding, G. D.

doi:10.1139/f76-022

Cited by 15 publications

(15 citation statements)

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“…The results from the CCA analysis corroborate other studies focusing on small-scale environmental factors that influence fish abundance. The influence of temperature on stream fish distributions has been well documented (Symons et al 1976;Drake and Taylor 1996;Taniguchi et al 1998). Canopy cover was also a significant predictor of fish species abundance in the study watershed.…”

Section: Discussionmentioning

confidence: 70%

Stream Fish Assemblages in Relation to Landscape Position and Local Habitat Variables

2005

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The relative influence of local habitat variables and stream network position on fish assemblages was evaluated in this study of first‐order through third‐order streams within the Beaverkill–Willowemoc watershed in New York. We compared fish distribution and abundance over local and landscape scales by surveying 69 randomly selected tributaries within this 775‐km2 watershed. We used watershed‐level metrics of stream link magnitude, branch link, confluence link, downstream link, and stream order to evaluate the importance of stream network position upon fish assemblages. Results of canonical correspondence analysis indicated that six factors significantly influenced fish species abundance in our study watershed. The proportion of fine substrate, canopy cover, in‐stream vegetation, and water temperature were the four local habitat factors related to the abundance of fish species in this watershed; confluence link and stream order were the stream network position measures with the greatest influence on fish assemblages. Our results show that stream fish assemblages in the study watershed were influenced by a combination of small‐scale habitat variables and stream position within a watershed network. The significance of confluence link relative to that of other link measures designed to evaluate stream network position has never been previously established in a direct comparison. The usefulness of confluence link to characterize fish assemblages is consistent with efforts to identify metrics that are relevant to both watershed network geomorphology and ecology.

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Section: Discussionmentioning

confidence: 70%

Stream Fish Assemblages in Relation to Landscape Position and Local Habitat Variables

2005

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“…Covariates for survival.-The slimy sculpin is a coldwater fish; its upper lethal limit is around 258C (Symons et al 1976). Therefore, it was expected that maximum temperature (MT) would negatively impact survival.…”

Section: Methodsmentioning

confidence: 99%

Apparent Survival and Detection Estimates for PIT‐Tagged Slimy Sculpin in Five Small New Brunswick Streams

Keeler¹,

Breton²,

Peterson³

et al. 2007

Trans Am Fish Soc

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The slimy sculpin Cottus cognatus is an abundant and widespread benthic fish that inhabits cold lakes and rivers in North America. The objective of this study was to estimate survival and detection probabilities for slimy sculpin in relation to several environmental and biological predictors. Passive integrated transponder (PIT) tags were implanted into 337 adult slimy sculpin in five tributaries of the Kennebecasis River, New Brunswick, Canada. A portable PIT tag antenna was used to search for marked individuals from June 2003 to July 2004. Cormack–Jolly–Seber open population models were used to test several predictions and to estimate apparent survival and detection probabilities. We found that survival was high (73–99%) among sampling events; the average period was about 4 weeks (range, <1–22 weeks). Survival was positively related to fish length and negatively related to maximum stream discharge. The mean detection probability of tagged sculpin was 0.80, but it varied among sampling events and with respect to the minimum electrical current of our antenna and the percentage of boulder substrate at the site. This study demonstrates that a portable PIT tag system can be used in conjunction with capture–mark–recapture models to acquire an understanding of the basic life history characteristics of slimy sculpin and possibly other small‐bodied fish in freshwater systems.

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“…Avoidance may become a favorable strategy and fish must either move out of warmer sites or remain and risk mortality. As a cool‐water stenotherm, the sculpin has a narrow temperature range with an upper lethal limit of approximately 23 to 25°C [9,10] and, thus, would be unable to survive in waters above 25°C for very long [11]. In the present study, all sites with temperatures ≥25°C were devoid of YOY sculpin.…”

Section: Discussionmentioning

confidence: 79%

Impacts of nonpoint inputs from potato farming on populations of slimy sculpin (Cottus cognatus)

Gray¹,

Curry²,

Munkittrick³

2005

Enviro Toxic and Chemistry

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The potential influence of agricultural activity, particularly potato cultivation, on slimy sculpin populations (Cottus cognatus) was examined at 19 rivers of New Brunswick, Canada. Comparisons with forested streams resulted in differences in fish density, size, and reproductive performance. Young-of-the-year (YOY) sculpin were present only at two of 11 agricultural sites, though they were present at all nine forested sites. Sediment deposition was greatest at agricultural sites, with increased fine sediments deposited. Larger, coarse sands were deposited at two sites with active forest operations. Temperature had a stronger correlation than sedimentation with sculpin size and density in the agricultural region. Agricultural catchments were warmer than in forested catchments (median = 16.0 and 13.3 degrees C, respectively). Body size of slimy sculpin was correlated positively and YOY densities correlated negatively with temperature, and sites with temperatures > or = 25 degrees C were devoid of YOY sculpin. Our data indicate there is a significant effect of temperature on slimy sculpin populations in rivers of potato farming areas, highlighting the importance of examining indirect factors when investigating possible impacts of nonpoint source agricultural inputs. Indirect factors such as sediment deposition and temperature need to be considered in order to discriminate accurately the chronic impacts of agricultural chemicals on fish populations.

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Upper Lethal and Preferred Temperatures of the Slimy Sculpin, Cottus cognatus

Abstract: The upper lethal and preferred (96-h LT50) temperatures of slimy sculpin (Cottus cognatus) acclimated at 20 C are 25.0 and 13 C, respectively.

Cited by 15 publications

References 0 publications

Stream Fish Assemblages in Relation to Landscape Position and Local Habitat Variables

Stream Fish Assemblages in Relation to Landscape Position and Local Habitat Variables

Apparent Survival and Detection Estimates for PIT‐Tagged Slimy Sculpin in Five Small New Brunswick Streams

Impacts of nonpoint inputs from potato farming on populations of slimy sculpin (Cottus cognatus)

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