The impact of angler groundbait on benthic invertebrates and sediment respiration in a shallow eutrophic reservoir

1987 ◽  
Vol 46 (2) ◽  
pp. 137-150 ◽  
Author(s):  
Martin Cryer ◽  
Ron W. Edwards
Keyword(s):  
Benthic Invertebrates ◽  
Eutrophic Reservoir ◽  
Sediment Respiration ◽  
The Impact

Managing the Impacts of Human Activities on Fish Habitat: The Governance, Practices, and Science

2015 ◽  
Keyword(s):  
Benthic Invertebrates ◽  
Marine Mammals ◽  
Fish Habitat ◽  
Fishing Gear ◽  
Governance Practices ◽  
Coexisting Species ◽  
The Government ◽  
The Impact ◽  
Poor Infrastructure ◽  
Technical Measures

<em>Abstract.</em>—Mexico is an important producer of fish resources, contributing 1.5% to the total world production. However, most of the fisheries are overexploited or fished to the maximum sustainable level as a result of problems such as overexploitation, poor infrastructure, poaching, limited knowledge of fishing laws, high discard rates, weak fisheries institutions, and little ability to research and manage these difficulties. To solve these problems, the National Program of Fisheries and Aquaculture was established in order to achieve sustainability in Mexican fisheries with the participation of the government, the fishing industry and research institutions. The program has been implemented for the 22 main fisheries of the country, notably the tuna, shrimp and shark fisheries, for which technical measures have been implemented for controlling the catch, the effort and the impact on coexisting species. Specifically, these measures have been aimed at reducing the bycatch of marine mammals and turtles, demersal and benthopelagic fishes and benthic invertebrates. Also, measures have been implemented to mitigate impacts of fishing gear on the benthos and coral reefs. However, many issues still need to be resolved both for these and other lower revenue fisheries, which are important in terms of their effect on ecosystems.

Fish and Benthic Invertebrates: Community Concordance and Community–Environment Relationships

1993 ◽  
Vol 50 (12) ◽  
pp. 2641-2651 ◽  
Author(s):  
Donald A. Jackson ◽  
Harold H. Harvey
Keyword(s):  
Water Chemistry ◽  
Shallow Lakes ◽  
Benthic Invertebrates ◽  
Cold Water ◽  
Morphological Characteristics ◽  
Community Environment ◽  
South Central ◽  
Invertebrate Predators ◽  
Lake Morphology ◽  
The Impact

Fish and benthic invertebrates from 40 lakes in south-central Ontario showed significantly concordant patterns based on community structure. Fish communities were associated significantly with lake morphological characteristics, but were uncorrelated with water chemistry. Large, deep lakes differed from shallow lakes in their fish species, having richer faunas due to the additional cold-water species. Centrarchid species occurred more frequently in small, shallow lakes than in larger lakes. The invertebrate community was not correlated with lake morphology, but showed a significant association with water chemistry, principally lake pH. A strong contrast in the abundance of Chaoborus and Holopedium existed, but it was unclear whether this was due to a predator–prey relationship or to differences in acid tolerance. Although the lakes showed similar patterns in the composition of both communities, each community was associated with a different set of environmental factors. Biotic processes within and between communities explain this paradox in community–environment relationships. Such biotic interactions may involve direct processes such as fish predation on a particular invertebrate taxon or indirect factors, e.g., where fish limit the abundance of invertebrate predators, thereby limiting the impact of these invertebrate predators.

Small spate disturbance and the complexity of habitat architecture in Mountain River, Tasmania

1996 ◽  
Vol 47 (6) ◽  
pp. 851 ◽  
Author(s):  
BJ Robson
Keyword(s):  
Benthic Invertebrates ◽  
Base Flow ◽  
Temporal Context ◽  
Population Fluctuations ◽  
Mountain River ◽  
Similar Magnitude ◽  
Short Term ◽  
Before And After ◽  
Study Sites ◽  
The Impact

Densities of benthic invertebrates were counted over several weeks before and after a small winter spate (15.5 times base flow) in two riffle types of contrasting architectural complexity in Mountain River, Tasmania. Complex benthic architecture reduced the impact of this spate on invertebrate densities over the short term (seven days). Longer-term recovery (several weeks) was unaffected by riffle architecture, with one of the riffles recovering much more slowly than the others. Refuges from small spates in Mountain River may exist in mid channel in complex boulder-cobble riffles. Within its temporal context, the effects of the spate on the study sites were of a similar magnitude to other unexplained population fluctuations.

The impact of hydromorphological restoration on river ecological status: a comparison of fish, benthic invertebrates, and macrophytes

Hydrobiologia ◽  
2012 ◽  
Vol 704 (1) ◽  
pp. 475-488 ◽  
Author(s):  
P. Haase ◽  
D. Hering ◽  
S. C. Jähnig ◽  
A. W. Lorenz ◽  
A. Sundermann
Keyword(s):  
Benthic Invertebrates ◽  
Ecological Status ◽  
The Impact

Nutrient-dependent recovery of Atlantic salmon streams from a catastrophic flood

2001 ◽  
Vol 58 (8) ◽  
pp. 1672-1682 ◽  
Author(s):  
Zhongyan Weng ◽  
Nandita Mookerji ◽  
Asit Mazumder
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Growth Rates ◽  
Benthic Invertebrates ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Recovery Phase ◽  
Stream Communities ◽  
Periphyton Biomass ◽  
The Impact

The impact of a major flood and recovery of the stream communities under contrasting nutrient conditions were studied in two second-order streams of Sainte-Marguerite River, Quebec. A massive flood during the summer of 1996 caused extensive displacement of the stream substratum and severe reductions in the abundance of all biota: periphyton, benthic invertebrates, juvenile Atlantic salmon (Salmo salar), and brook trout (Salvelinus fontinalis) (especially in the 0+ age-class). In the postflood recovery phase, nutrient-enriched sections recovered significantly more rapidly than the nonenriched sections. After 1 month, periphyton biomass in the enriched sections had increased to five times that of the preflood levels, and after 2 months, the invertebrate communities had recovered to preflood levels. Fish densities and growth rates also returned to normal levels more rapidly in the enriched sections. Our results suggest that nutrient-rich systems are more resilient to massive disturbances, and so, nutrient enrichment may represent a viable tool for restoring nutrient-limited systems.

scholarly journals Bioturbation enhances the aerobic respiration of lake sediments in warming lakes

2016 ◽  
Vol 12 (8) ◽  
pp. 20160448 ◽  
Author(s):  
Viktor Baranov ◽  
Jörg Lewandowski ◽  
Stefan Krause
Keyword(s):  
Lake Sediment ◽  
Carbon Metabolism ◽  
Seasonal Changes ◽  
Biogeochemical Cycles ◽  
Aerobic Respiration ◽  
Sediment Respiration ◽  
The Earth ◽  
Global Biogeochemical Cycles ◽  
The Impact ◽  
Benthic Animals

While lakes occupy less than 2% of the total surface of the Earth, they play a substantial role in global biogeochemical cycles. For instance, shallow lakes are important sites of carbon metabolism. Aerobic respiration is one of the important drivers of the carbon metabolism in lakes. In this context, bioturbation impacts of benthic animals (biological reworking of sediment matrix and ventilation of the sediment) on sediment aerobic respiration have previously been underestimated. Biological activity is likely to change over the course of a year due to seasonal changes of water temperatures. This study uses microcosm experiments to investigate how the impact of bioturbation (by Diptera, Chironomidae larvae) on lake sediment respiration changes when temperatures increase. While at 5°C, respiration in sediments with and without chironomids did not differ, at 30°C sediment respiration in microcosms with 2000 chironomids per m 2 was 4.9 times higher than in uninhabited sediments. Our results indicate that lake water temperature increases could significantly enhance lake sediment respiration, which allows us to better understand seasonal changes in lake respiration and carbon metabolism as well as the potential impacts of global warming.

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