What Science Brings to the Challenge of Recovering Species
... for one to six years before returning as adults to spawn in natal streams (Table 1, Groot & Margolis 1991). Five species of salmonids are obligately semelparous, and steelhead and coastal cutthroat trout can be iteroparous, making the fresh-tosaltwater migration two to three times before dying (Groo ...
... for one to six years before returning as adults to spawn in natal streams (Table 1, Groot & Margolis 1991). Five species of salmonids are obligately semelparous, and steelhead and coastal cutthroat trout can be iteroparous, making the fresh-tosaltwater migration two to three times before dying (Groo ...
Powder Subbasin Summary
... The headwater streams of the Powder River subbasin are located in the Blue and Wallowa mountains at elevations between 6,000 and 8,000 feet. The timing and amount of spring runoff is dependent on winter snowpack depth and condition as well as spring weather factors such as temperature and rainfall. ...
... The headwater streams of the Powder River subbasin are located in the Blue and Wallowa mountains at elevations between 6,000 and 8,000 feet. The timing and amount of spring runoff is dependent on winter snowpack depth and condition as well as spring weather factors such as temperature and rainfall. ...
andrés meynard pontificia universidad católica de
... population size (Ne) reconstructions of each of these four clusters (indicated by arrows) using the Beast software program.. .................................................................................................94 Figure 6. Phylogeographic scenarios for S. scurra clusters simulated in DYA ...
... population size (Ne) reconstructions of each of these four clusters (indicated by arrows) using the Beast software program.. .................................................................................................94 Figure 6. Phylogeographic scenarios for S. scurra clusters simulated in DYA ...
Studies on Baltic Sea mysids Martin Ogonowski Department of Systems Ecology
... abundance estimation. Since TS is more or less proportional to the size of objects, it is important to understand how, when and where different sizes are distributed in the water column. For this reason, efforts were made to decipher the underlying factors that govern vertical size distributions of ...
... abundance estimation. Since TS is more or less proportional to the size of objects, it is important to understand how, when and where different sizes are distributed in the water column. For this reason, efforts were made to decipher the underlying factors that govern vertical size distributions of ...
Rocky Intertidal Zone
... also increase during the daytime as photosynthesis proceeds but fall at night when only respiration occurs. Carbon dioxide accumulates, and pH may decline as respiration continues in isolated pools (Davenport and Woolmingon, 1981). Seasonal changes in climate add another temporal component to the fl ...
... also increase during the daytime as photosynthesis proceeds but fall at night when only respiration occurs. Carbon dioxide accumulates, and pH may decline as respiration continues in isolated pools (Davenport and Woolmingon, 1981). Seasonal changes in climate add another temporal component to the fl ...
native fish strategy forum 2007 - Murray
... Currently, the options for controlling carp, or any other invasive pest fish in the Murray-Darling system, are extremely limited. In small water bodies, biocides (mainly rotenone) can be used to kill carp, along with traps or selective draining of billabongs and swamps, both of which take advantage ...
... Currently, the options for controlling carp, or any other invasive pest fish in the Murray-Darling system, are extremely limited. In small water bodies, biocides (mainly rotenone) can be used to kill carp, along with traps or selective draining of billabongs and swamps, both of which take advantage ...
CBD Third National Report - Mauritius (English version)
... latest such deforestation took place in the 1970’s through to the early 1980’s when large areas of native vegetation were turned into forestry plantations (Cheke, 1987). These introductions have somehow deteriorated the landscape and greatly impoverished the habitat of the existing fauna. Very few n ...
... latest such deforestation took place in the 1970’s through to the early 1980’s when large areas of native vegetation were turned into forestry plantations (Cheke, 1987). These introductions have somehow deteriorated the landscape and greatly impoverished the habitat of the existing fauna. Very few n ...
This page was printed from the www.invadingspecies.com website
... by destroying large quantities of plant life, which is detrimental to some native fish populations and other animals that depend on aquatic vegetation for food, cover and spawning and nursery habitat. Since both types of carp can only digest about half of the plant material it eats, the rest is expe ...
... by destroying large quantities of plant life, which is detrimental to some native fish populations and other animals that depend on aquatic vegetation for food, cover and spawning and nursery habitat. Since both types of carp can only digest about half of the plant material it eats, the rest is expe ...
New Zealand as ecosystems - Department of Conservation
... They, in turn, make up myriad, ‘thermo-dynamically open systems that are out of equilibrium’ 8 , each a self-regulating, shifting mosaic in continuous flux but with functional, historical and evolutionary limits. The result has been a more holistic view of the relationships among plants, animals, an ...
... They, in turn, make up myriad, ‘thermo-dynamically open systems that are out of equilibrium’ 8 , each a self-regulating, shifting mosaic in continuous flux but with functional, historical and evolutionary limits. The result has been a more holistic view of the relationships among plants, animals, an ...
A LITERATURE REVIEW of THE ECOLOGICAL EFFECTS of
... These may also have been in Zostera beds (see paragraph below on vegetation beds). ...
... These may also have been in Zostera beds (see paragraph below on vegetation beds). ...
Introduction. - Trace: Tennessee Research and Creative Exchange
... plant traits (i.e., phenotypes). Neighbor genotype always explained more variation in focal plant belowground productivity than focal plant aboveground productivity. Because the plants used in the experiment were limited by nutrient availability, this result suggests that neighbor genotype variation ...
... plant traits (i.e., phenotypes). Neighbor genotype always explained more variation in focal plant belowground productivity than focal plant aboveground productivity. Because the plants used in the experiment were limited by nutrient availability, this result suggests that neighbor genotype variation ...
SoE 2016 Biodiversity report (PDF - 10.3 MB)
... and benefits need to be well understood, particularly given the growing need to use translocation to meet environmental conditions of approval of development applications. The past 5 years have seen an increase in effort to trial ‘future proofing’ of wild populations of threatened species in new are ...
... and benefits need to be well understood, particularly given the growing need to use translocation to meet environmental conditions of approval of development applications. The past 5 years have seen an increase in effort to trial ‘future proofing’ of wild populations of threatened species in new are ...
Abalone - Dauphin Island Sea Lab
... Dead organisms beneath the rearing tank should be removed and a good water flow provided ...
... Dead organisms beneath the rearing tank should be removed and a good water flow provided ...
Steneck. Status of Bonaire`s Coral Reefs 2015
... Finally, the recent increase in coastal development is evident in town. While this development may appear innocuous, the increased number of visitors and residents may have unintended consequences for the coral reef. For example, there are large piles of white sand at Front Porch. This may improve t ...
... Finally, the recent increase in coastal development is evident in town. While this development may appear innocuous, the increased number of visitors and residents may have unintended consequences for the coral reef. For example, there are large piles of white sand at Front Porch. This may improve t ...
Marron - Department of Fisheries
... Marron are preyed upon by native water rats, tortoises, birds (such as cormorants), fish such as freshwater cobbler and introduced species such as redfin perch and trout – as well as bigger marron. Marron are crepuscular, meaning they are most active just after sunset. ...
... Marron are preyed upon by native water rats, tortoises, birds (such as cormorants), fish such as freshwater cobbler and introduced species such as redfin perch and trout – as well as bigger marron. Marron are crepuscular, meaning they are most active just after sunset. ...
ingram et al 2012 evolution - Zoology, UBC
... predation. Stickleback repeatedly colonized small lakes from the ocean at the end of the last ice age (about 12,000 years ago). In contrast to a few lakes in which benthic and limnetic specialist species pairs have evolved, most lakes contain a single “solitary” stickleback population that feeds on ...
... predation. Stickleback repeatedly colonized small lakes from the ocean at the end of the last ice age (about 12,000 years ago). In contrast to a few lakes in which benthic and limnetic specialist species pairs have evolved, most lakes contain a single “solitary” stickleback population that feeds on ...
do similar communities develop in similar sites? a test
... identify distinct sets of communities. Community structure and function may be comparable in sensitivity for detecting change but need to be compared at equivalent scales. Dispersal (as evidenced by colonization history) was a regulator of new zooplankton communities, because it did not occur rapidl ...
... identify distinct sets of communities. Community structure and function may be comparable in sensitivity for detecting change but need to be compared at equivalent scales. Dispersal (as evidenced by colonization history) was a regulator of new zooplankton communities, because it did not occur rapidl ...
Carp (Cyprinus carpio L.) impacts and recruitment in Australian
... The only way to understand long-term impacts in wetlands is by long-term experimental manipulation, which has not occurred in Australia. Research on long-term (≥ 1 year) Carp impacts on native fish or other wetland biota is not explicitly addressed in strategies for future Carp research (CCCG 2000b) ...
... The only way to understand long-term impacts in wetlands is by long-term experimental manipulation, which has not occurred in Australia. Research on long-term (≥ 1 year) Carp impacts on native fish or other wetland biota is not explicitly addressed in strategies for future Carp research (CCCG 2000b) ...
Illinois Biodiversity Basics
... us. The challenge now is to learn as much as we can to gain a new perspective on our place in the natural world, so that not only will we be better able to protect living things, but we’ll also create a more sustainable and responsible society. The diversity of life on earth shapes and nourishes eve ...
... us. The challenge now is to learn as much as we can to gain a new perspective on our place in the natural world, so that not only will we be better able to protect living things, but we’ll also create a more sustainable and responsible society. The diversity of life on earth shapes and nourishes eve ...
How top consumers structure food webs with multiple pathways of
... Smith and Slobodkin (1960) in their seminal paper. These authors argued that, given the surplus of green plant biomass in natural communities, grazers seem not to be limited by ...
... Smith and Slobodkin (1960) in their seminal paper. These authors argued that, given the surplus of green plant biomass in natural communities, grazers seem not to be limited by ...
Sea lamprey (Petromyzon marinus) control in the Lake Champlain
... important about sea lamprey is that they prefer to prey on fish species with small scales and thin skin: fish like the Atlantic salmon (Salmo salar) and the lake trout (Salvelinus namaycush) (NYSDEC, 2012). Sea lamprey do not always kill their hosts. Studies on the Great Lakes, where populations of ...
... important about sea lamprey is that they prefer to prey on fish species with small scales and thin skin: fish like the Atlantic salmon (Salmo salar) and the lake trout (Salvelinus namaycush) (NYSDEC, 2012). Sea lamprey do not always kill their hosts. Studies on the Great Lakes, where populations of ...
GLRI Action Plan - Great Lakes Restoration Initiative
... The lands and waters of the Great Lakes are like no other place. In a world where fresh surface water is increasingly in demand, the region contains some 20 percent of it. At a time when people are not looking as much to faraway places for respite, the Great Lakes offer some of the most majestic nat ...
... The lands and waters of the Great Lakes are like no other place. In a world where fresh surface water is increasingly in demand, the region contains some 20 percent of it. At a time when people are not looking as much to faraway places for respite, the Great Lakes offer some of the most majestic nat ...
PhD Thesis - Universidad Autónoma de Madrid
... environmental and anthropogenic causes. Thereby, in this doctoral thesis, we carried out different investigations to study the behavioural and physiological stress responses of several small mammal species to different environmental and human factors. Behavioral responses to predation risk, interspe ...
... environmental and anthropogenic causes. Thereby, in this doctoral thesis, we carried out different investigations to study the behavioural and physiological stress responses of several small mammal species to different environmental and human factors. Behavioral responses to predation risk, interspe ...
Annexes_HLG_NS_JR_discardplan_demersal_03062015
... relatively small proportion of total Scottish landings (~ 10 % in 2013, ICES, 2014), creelcaught Nephrops attract high prices in the live export market and can provide an important source of income for small local boats. To the west of Scotland, creel fishing accounted for 17 % of landings in the No ...
... relatively small proportion of total Scottish landings (~ 10 % in 2013, ICES, 2014), creelcaught Nephrops attract high prices in the live export market and can provide an important source of income for small local boats. To the west of Scotland, creel fishing accounted for 17 % of landings in the No ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.