| proterometra autraini n. sp. (digenea: azygiidae) from michigan's upper peninsula and a key to species of proterometra. | life stages of proterometra autraini n. sp. (digenea: azygiidae) from the au train river, au train, michigan are described, with emphasis on the cercarial stage. progenetic cercariae develop in rediae in the snail elimia livescens and emerge seasonally from mid-summer to mid-autumn. cercariae emerge naturally between 1000 and 2100 hr edt. adults were retrieved from several naturally infected fish species. specimens of cottus bairdi (n = 16) displayed the greatest prevalence (75%), mean intensity ... | 1995 | 7776132 |
| distribution, prevalence, and pathology of a microsporidian infecting freshwater sculpins. | microsporidian infections are common in many fish species, yet detailed studies of these parasites in ecologically important wild populations are rare. phylogenetic analysis using rdna sequence data and parasite morphology indicate that mottled sculpin cottus bairdii and slimy sculpin c. cognatus are hosts for glugea sp. microsporidia in the northern usa. glugea sp. is common in the michigan populations sampled for this study, and prevalence was ≥ 70% in 4 of 6 infected populations (range -4 to ... | 2016 | 27025307 |
| complex postglacial recolonization inferred from population genetic structure of mottled sculpin cottus bairdii in tributaries of eastern lake michigan, u.s.a. | this study used analyses of the genetic structure of a non-game fish species, the mottled sculpin cottus bairdii to hypothesize probable recolonization routes used by cottids and possibly other laurentian great lakes fishes following glacial recession. based on samples from 16 small streams in five major lake michigan, u.s.a., tributary basins, significant interpopulation differentiation was documented (overall fst= 0·235). differentiation was complex, however, with unexpectedly high genetic sim ... | 2016 | 27616022 |
| congener patterns of persistent organic pollutants establish the extent of contaminant biotransport by pacific salmon in the great lakes. | in the great lakes, introduced pacific salmon (oncorhynchus spp.) can transport persistent organic pollutants (pops), such as polychlorinated biphenyls (pcbs) and polybrominated diphenyl ethers (pbdes), to new environments during their spawning migrations. to explore the nature and extent of pop biotransport by salmon, we compared 58 pcb and 6 pbde congeners found in spawning salmon directly to those in resident stream fish. we hypothesized that stream fish exposed to salmon spawners would have ... | 2016 | 26641658 |
| lateral line stimulation patterns and prey orienting behavior in the lake michigan mottled sculpin (cottus bairdi). | information contained in the spatial excitation pattern along arrayed sensors in the lateral line system of lake michigan mottled sculpin, as well as other surface-feeding fish and amphibians, is thought to play a fundamental role in guiding prey-orienting behaviors. however, the way in which prey location is encoded by the excitation pattern and used by the nervous system to direct orienting behaviors is largely unknown. in this study, we test the hypothesis that mottled sculpin use excitation ... | 2009 | 19137317 |
| hydrodynamic image formation by the peripheral lateral line system of the lake michigan mottled sculpin, cottus bairdi. | lake michigan mottled sculpin (cottus bairdi) have a lateral-line-mediated prey-capture behaviour that consists of an initial orientation towards the prey, a sequence of approach movements, and a final strike at the prey. this unconditioned behaviour can be elicited from blinded sculpin in the laboratory by both real and artificial (vibrating sphere) prey. in order to visualize what lake michigan mottled sculpin might perceive through their lateral line when approaching prey, we have combined an ... | 2000 | 11079380 |
| rhabdochona cotti (nematoda: rhabdochonidae) in mottled sculpins, cottus bairdi, from the ford river, michigan. | a total of 933 mottled sculpins, cottus bairdi girard (cottidae), was examined for rhabdochona cotti from april 1983 through november 1986 from 3 localities (up-river, middle, down-river) in the ford river in michigan's upper peninsula. the prevalence and mean intensity of r. cotti were highest in sculpins from the middle (37%) and up-river localities (2.0), respectively. the intensity of r. cotti significantly increased with host length at the middle and down-river localities. rhabdochona cotti ... | 1995 | 7776140 |