Back to Search
Start Over
Trophic Ecology of Olympic Mudminnow (Novumbra hubbsi) in Lake Ozette, Washington
- Source :
- Northwest Science. 92:267
- Publication Year :
- 2018
- Publisher :
- Northwest Scientific Association, 2018.
-
Abstract
- Washington State's only endemic fish, Olympic mudminnow (Novumbra hubbsi), was listed as state “Sensitive” in 1999 due to a small range and concern about population declines and threats, including impacts from nonnative competitors and predators. We investigated the trophic ecology of Olympic mudminnow to identify habitat and foraging specialization across three sites in Lake Ozette (Olympic National Park, Washington), and evaluate evidence for resource interactions with sympatric fish species. Stable isotopes of carbon and nitrogen from dominant co-occurring fish—yellow perch (Percaflavescens), prickly sculpin (Cottus asper), and northern pikeminnow (Ptychocheilus oregonensis)—were evaluated for evidence of competition with and predation on Olympic mudminnow using trophic niche overlap and stable isotope mixing models. Evidence from co-occurrence and isotope analyses supported spatial and trophic segregation of Olympic mudminnow, and reduced likelihood of competitive and predatory relationships. Of the sympatric fish examined, prickly sculpin may be the most likely to experience biotic interactions with Olympic mudminnow. These results are consistent with other research demonstrating strong habitat and microhabitat specialization by Olympic mudminnow and suggest that access to these favored habitats may be an important mediating factor in defining the potential for biotic interactions with other species, including nonnative fishes.
- Subjects :
- 0106 biological sciences
education.field_of_study
biology
Ecology
010604 marine biology & hydrobiology
media_common.quotation_subject
Population
Northern pikeminnow
biology.organism_classification
010603 evolutionary biology
01 natural sciences
Competition (biology)
Predation
Geography
Novumbra hubbsi
Sculpin
education
Cottus asper
Ecology, Evolution, Behavior and Systematics
media_common
Trophic level
Subjects
Details
- ISSN :
- 0029344X
- Volume :
- 92
- Database :
- OpenAIRE
- Journal :
- Northwest Science
- Accession number :
- edsair.doi...........b638d1ea4111292d390d31a4b45cd190