bluehead

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  • noun

Synonyms for bluehead

small Atlantic wrasse the male of which has a brilliant blue head

References in periodicals archive ?
Prior to the two-pass mark-recapture electrofishing, we already had tagged 24 bluehead suckers captured during 2006 in Reach 1 and 132 bluehead suckers captured during 2007-2009 in Reach 2 as part of other sampling efforts.
We characterized structure of size classes of the population for each reach we studied by categorizing the length at initial capture of each bluehead sucker sampled during 2006-2009 using 10-mm size bins.
5 by 66 cm) only in Reach 1 and installed it in a 1-m deep run in a location that had a high concentration of bluehead suckers.
We calculated annual rates of survival of bluehead suckers in Reach 1 using a combination of active-recapture data during electrofishing surveys performed in 2006-2009 and passive detection from the PIA.
We considered potential effects of three candidate-limiting factors for bluehead suckers in the Weber River and compared the relative contribution of these factors between the two reaches we studied: densities of brown trout changes with the hydrologic regime post-construction of the mainstem dam, and effects of an altered thermal regime.
RESULTS--Abundance of bluehead suckers >150 mm total length was greater in Reach 2 (546; 95% CI423-772) than in Reach 1 (225; 95% CI 141-416), but densities were comparable between the two reaches (Table 1).
In Reach 2, we observed multiple size classes of bluehead suckers with 200-300 mm total length being dominate size classes.
Bluehead suckers moved longer distances in Reach 2 than in Reach 1.
We actively recaptured or passively detected on the PIA 110 bluehead suckers in Reach 1 (fish were PIT-tagged starting in 2006); the longest movement was 2.
Bluehead suckers were more active during night than in day at the PIA in Reach 1.
Based on our top model, annual survival of bluehead suckers in Reach 1 was high with an annual mean of 77% (95% CI = 39-95%) and a small decrease in survival and increase in variability across years.
Abundance of brown trout was six times greater than abundance of bluehead suckers in Reach 2 as compared to 50 times greater in Reach 1 (Table 1).
DISCUSSION--Reversing the rangewide decline of the bluehead sucker has been hampered by a general lack of information about this species.
in contrast, recruitment of bluehead suckers in Reach 1 was nearly absent.
In addition to failure of recruitment, restricted movement might contribute to declines in bluehead suckers.