Spatial and temporal distribution of larval fishes in a large tidal river.

There are few published studies of larval fish assemblages from unregulated, tidal freshwater rivers. Patterns in the spatial and temporal distribution of larval fishes in the Mattaponi River were examined. Sampling took place on a weekly basis from February through August, 2006 and 2007. Larval fishes were categorized by taxa, reproductive guild, and residency guild. Group comparisons using multi-response permutation procedures (MRPP) indicated significant spatial and temporal differences in assemblage composition on multiple scales. Differences in assemblage composition were analyzed using non-metric multidimensional scaling (NMS). Interannual differences were attributable to anadromous and semi-migratory species. Seasonal differences were attributable to herrings, perches, and minnows. Both interannual and seasonal differences in assemblage composition may have been a result of changes in discharge. Spatial (i.e. longitudinal) variation of the larval fish assemblage differed by tidal regime. NMS and MRPP identified a distinct tidal freshwater larval fish assemblage. Tidal freshwater habitats may act as ecotones between marine and riverine ecosystems.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Biology

Year dc:date.available

2010

Author dc:creator

• Seelig, Harold

Contributors dc:contributor

• Greg Garman

• Biology
• Life Sciences

Statement dc:rights

• © The Author

Identifier

https://scholarscompass.vcu.edu/etd/79

OAI identifier oai:identifier

oai:scholarscompass.vcu.edu:etd-1078