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Full-Text Articles in Animal Sciences
Effects Of Food Limitation On Growth, Body Condition And Metabolic Rates Of Non-Native Blue Catfish, Vaskar Nepal, Mary C. Fabrizio, Richard Brill
Effects Of Food Limitation On Growth, Body Condition And Metabolic Rates Of Non-Native Blue Catfish, Vaskar Nepal, Mary C. Fabrizio, Richard Brill
VIMS Articles
Establishment and range expansion of non-native species in novel habitats depend on their energetic requirements and food availability. Knowledge of growth and metabolic rates of non-native fishes at various food levels is particularly critical to inform models that assess their invasion potential. We compared growth rates, body condition and metabolic rates of juvenile blue catfish (Ictalurus furcatus), an invasive species in many lakes, coastal rivers and estuaries throughout the Eastern USA, at three ration levels: ad libitum (3.5% of fish body mass/d), two-third ad libitum and one-third ad libitum. All fish survived the entire duration of the experiment (4 months) …
Sublethal Effects Of Salinity And Temperature On Non-Native Blue Catfish: Implications For Establishment In Atlantic Slope Drainages, Vaskar Nepal, Mary C. Fabrizio
Sublethal Effects Of Salinity And Temperature On Non-Native Blue Catfish: Implications For Establishment In Atlantic Slope Drainages, Vaskar Nepal, Mary C. Fabrizio
VIMS Articles
The distribution and further range expansion of non-native blue catfish Ictalurus furcatus in coastal waters throughout the United States Atlantic slope depend, in part, on the salinity tolerance of the fish. However, temperature-mediated sublethal effects of increased salinities on blue catfish biology are not yet known. We assessed the effects of salinity and temperature on growth, body condition, body composition and food consumption of juvenile blue catfish in a controlled laboratory experiment. Temperature and salinity had an interactive effect on blue catfish biology, although most fish survived 112 days in salinities up to 10 psu. At salinities 9 psu) likely …
Invasive Blue Catfish In The Chesapeake Bay Region: A Case Study Of Competing Management Objectives, Mary C. Fabrizio, Vaskar Nepal, Troy D. Tuckey
Invasive Blue Catfish In The Chesapeake Bay Region: A Case Study Of Competing Management Objectives, Mary C. Fabrizio, Vaskar Nepal, Troy D. Tuckey
VIMS Articles
Freshwater fishes have been introduced outside their native range to establish recreational fisheries, but management conflicts arise when such introductions also result in potentially harmful effects on native species. In this case study, we focus on Blue Catfish Ictalurus furcatus, which were introduced in the Chesapeake Bay region and are now considered invasive. In many tidal tributaries, Blue Catfish have increased dramatically in abundance, expanded into high-salinity habitats (up to 21.8 psu), and negatively affected native species, prompting calls for the development of an effective management plan. However, management of this conflict species is complicated by multiple competing objectives, including …
High Salinity Tolerance Of Invasive Blue Catfish Suggests Potential For Further Range Expansion In The Chesapeake Bay Region, Vaskar Nepal, Mary C. Fabrizio
High Salinity Tolerance Of Invasive Blue Catfish Suggests Potential For Further Range Expansion In The Chesapeake Bay Region, Vaskar Nepal, Mary C. Fabrizio
VIMS Articles
In estuaries, salinity is believed to limit the colonization of brackish water habitats by freshwater species. Blue catfish Ictalurus furcatus, recognized as a freshwater species, is an invasive species in tidal rivers of the Chesapeake Bay. Salinity tolerance of this species, though likely to determine its potential range expansion and dispersal in estuarine habitats, is not well-known. To address this issue, we subjected blue catfish to a short-term salinity tolerance experiment and found that this species tolerates salinities higher than most freshwater fishes and that larger blue catfish tolerate elevated salinities for longer periods compared with smaller individuals. Our …