Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Effects Of Hurricane Katrina On Freshwater Fish Assemblages In A Small Coastal Tributary Of Lake Pontchartrain, Louisiana, Martin O'Connell
Effects Of Hurricane Katrina On Freshwater Fish Assemblages In A Small Coastal Tributary Of Lake Pontchartrain, Louisiana, Martin O'Connell
Martin T O'Connell
Hurricane Katrina struck southeastern Louisiana on 29 August 2005 and thereby created an opportunity to examine the effects of a catastrophic storm on fish assemblages in a coastal stream. Bayou Lacombe is a small (46.1 river kilometers), primarily freshwater stream that drains into the northeastern portion of Lake Pontchartrain, a large oligohaline estuary located north of New Orleans. In summer 2005 (prior to the hurricane), three upstream and three downstream reaches of Bayou Lacombe were surveyed by electrofishing. These same six reaches were resurveyed in the summer of 2006 to assess the effects of the hurricane on fish assemblages. There …
After The Storm: Post-Katrina Reflections From Afs Members In Louisiana And Mississippi, Martin O'Connell
After The Storm: Post-Katrina Reflections From Afs Members In Louisiana And Mississippi, Martin O'Connell
Martin T O'Connell
No abstract provided.
Ichthyofaunal And Habitat Associations Of Distinct Populations Of Southern Redbelly Dace, Phoxinus Erythrogaster (Teliostei: Cyprinidae) In Mississippi, Martin O'Connell
Ichthyofaunal And Habitat Associations Of Distinct Populations Of Southern Redbelly Dace, Phoxinus Erythrogaster (Teliostei: Cyprinidae) In Mississippi, Martin O'Connell
Martin T O'Connell
Twenty-two field sites in W-central Mississippi were surveyed for southern red- belly dace Phoxinus erythrogaster to characterize habitat and ichthyofaunal associations of these 'endangered' disjunct populations. Phoxinus erythrogaster occurred at only six sites. Data assessed similarity among all sites and described microhabitat associations of P erythro- gaster. Five species, including Semotilus atromaculatus, Campostoma anomalum, Etheostoma whipplei, P erythrogaster and Pimephales notatus, comprised 95% of the total number of in- dividuals collected at P erythrogaster sites. Standardized abundance (number per seine haul) for S. atromaculatus was consistently high among all P erythrogaster sites, whereas standard- ized abundance for C. anomalum, P …
Assessment Of Rarity Of The Blackmouth Shiner Notropis Melanostomus (Cyprinidae) Based On Museum And Recent Survey Data, Martin O'Connell
Assessment Of Rarity Of The Blackmouth Shiner Notropis Melanostomus (Cyprinidae) Based On Museum And Recent Survey Data, Martin O'Connell
Martin T O'Connell
Accurate knowledge of an organism's distribution is necessary for conserving species with small or isolated populations. A perceived rarity may only reflect inadequate sampling effort and suggest the need for more research. We used a recently developed method to evaluate the distribution of a rare fish species, the blackmouth shiner Notropis melanostomus Bortone 1989 (Cyprinidae), which occurs in disjunct populations in Mississippi and Florida. Until 1995, N. melanostomus had been collected from only three localities in Mississippi, but in 1995, eight new localities were discovered. We analyzed museum records of fish collections from Mississippi, Florida, and Alabama to compare sampling …
Fish Assemblage Stability Over Fifty Years In The Lake Pontchartrain Estuary; Comparisons Among Habitats Using Canonical Correspondence Analysis, Martin O'Connell, Robert Cashner, Christopher Schieble
Fish Assemblage Stability Over Fifty Years In The Lake Pontchartrain Estuary; Comparisons Among Habitats Using Canonical Correspondence Analysis, Martin O'Connell, Robert Cashner, Christopher Schieble
Martin T O'Connell
We assessed fish assemblage stability over the last half century in Lake Pontchartrain, an environmentally degraded oligohaline estuary in southeastern Louisiana. Because assemblage instability over time has been consistently associated with severe habitat degradation, we attempted to determine whether fish assemblages in demersal, nearshore, and pelagic habitats exhibited change that was unrelated to natural fluctuations in environmental variables (e.g., assemblage changes between wet and dry periods). Collection data from three gear types (trawl, beach seine, and gill nets) and monthly environmental data (salinity, temperature, and Secchi depth) were compared for four collecting periods: 1954 (dry period), 1978 (wet period), 1996–1998 …
Freshwater Fishes Of South Carolina By Fred C. Rohde, Rudolf G. Arndt, Jeffrey W. Foltz, And Joseph M. Quattro With Photographs By Fred C. Rohde-Book Review, Martin O'Connell
Freshwater Fishes Of South Carolina By Fred C. Rohde, Rudolf G. Arndt, Jeffrey W. Foltz, And Joseph M. Quattro With Photographs By Fred C. Rohde-Book Review, Martin O'Connell
Martin T O'Connell
No abstract provided.