Survival mechanisms of the central mudminnow (Umbra limi), fathead minnow (Pimephales promelas) and brook stickleback
(Culea inconsrans) for low oxygen in winter.
Selective predation upon pelvic phenotypes of brook stickleback
, Culaea inconstans, by northern pike, Esox lucius.
Four fish were collected, including three Creek Chubs (Semotilus atromaculatus) and a Brook Stickleback (55 mm standard length, HSU 3186).
However, the Brook Stickleback has been found in Nebraska since at least the early part of the last century.
Brook stickleback (Culaea inconstans [Kirtland]), a new addition to the upper Colorado River Basin fish fauna.
Age 0 brassy minnow and blackchin shiner were present in only 1 of 10 yr and redbelly dace, brook stickleback, and yellow perch in 3 of 10 yr.
Brassy minnow, redbelly dace, and brook stickleback exhibited primarily downstream movement during high discharge conditions but upstream movement under other flow conditions [ILLUSTRATION FOR FIGURES 7 AND 8 OMITTED].
For instance, over the 4-yr sampling period, 25% of the upstream movement of brook stickleback, 44% of the upstream movement of blackchin shiner, and 95% of the downstream movement of largemouth bass each occurred within different 2-d periods.
Furthermore, of the seven predominant species moving upstream on the elevated flow side of the stream, three species (brook stickleback, pumpkinseed sunfish, and black bullhead) accounted for 84% of the individuals.
In this study we continue to build the brook stickleback database by systematically examining the courtship repertoires from four geographically disjunct populations belonging to the Mississippi lineage (Sutherland Creek, Nebraska) and the Atlantic lineage (Tooley Creek, Southern Ontario; Algonquin Park, Central Ontario and Two Mile Creek, New York).
Adult brook stickleback were collected using minnow traps in early May of 2004 and 2006 from Sutherland Creek, Nebraska (41[degrees]08'13"N, 101[degrees]07'28"W); in 2004 from Two Mile Creek, New York (42[degrees]05'52"N, 78[degrees]26'38"W); in 1993 from Ring-Neck Pond, Algonquin Park, Ontario (45[degrees]34'52"N, 78[degrees]23'19"W) and in 1992 and 2006 from Tooley Creek, Ontario (43[degrees]52'11"N, 78[degrees]46'53"W).
Explorations into the interaction between genetic divergence and the intensity of both pre and postmating isolation between the allopatric brook stickleback lineages are currently being undertaken in our lab.
A descriptive analysis of the aggressive behavior of the male brook stickleback, Culaea inconstans.
Our results are consistent with Patton (1997) who found five of the six native species (brook stickleback absent) contained with our model averaged parameter estimates (that did not contain zero within 95% confidence intervals) with the plains topminnow in Wyoming streams.
When mean CPUE for all six native species were compared at all sites only two species, creek chub and brook stickleback had higher abundances at sites absent of plains topminnow.