Gadids and Alewives - Maine Center for Coastal Fisheries
... of species they prey upon is as great as cod, though haddock prefer smaller prey and while both are noted for gorging on herring spawn, haddock appear to do so more frequently than cod (Bigelow and Schroeder, 1953). Today, gut analyses show that GOM haddock consume fewer herring then those on George ...
... of species they prey upon is as great as cod, though haddock prefer smaller prey and while both are noted for gorging on herring spawn, haddock appear to do so more frequently than cod (Bigelow and Schroeder, 1953). Today, gut analyses show that GOM haddock consume fewer herring then those on George ...
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... above Punaluu Valley. However, on these occasions all individuals seen (except 2) were collected for captive propagation. These species are discussed in detail in Chapter 9.1. Surveys will be conducted for the remaining species (A. apexfulva, A. bulimoides, A. curta, A. leucorraphe, A. pulcherrima) ...
... above Punaluu Valley. However, on these occasions all individuals seen (except 2) were collected for captive propagation. These species are discussed in detail in Chapter 9.1. Surveys will be conducted for the remaining species (A. apexfulva, A. bulimoides, A. curta, A. leucorraphe, A. pulcherrima) ...
Islands as an Invasion Pathway for the Rusty Crayfish, Orconectes
... been invaded by the rusty crayfish. Water depth and distance from mainland did not seem to prevent colonization. A second, previously unidentified invader, Orconectes immunis, did not colonize islands isolated by depths greater than 12 meters. It was also found that each species weakly preferred cer ...
... been invaded by the rusty crayfish. Water depth and distance from mainland did not seem to prevent colonization. A second, previously unidentified invader, Orconectes immunis, did not colonize islands isolated by depths greater than 12 meters. It was also found that each species weakly preferred cer ...
A meso-predator release of stickleback promotes recruitment of
... glued on top of each of the algal substrates (bricks). We used the number of recruits over biomass since top-down control of algae is strongest at early life-stages (Lotze and Worm, 2000). Macroalgal tiles were sampled on 23 July. The number of recruits on each tile was counted under a dissecting mi ...
... glued on top of each of the algal substrates (bricks). We used the number of recruits over biomass since top-down control of algae is strongest at early life-stages (Lotze and Worm, 2000). Macroalgal tiles were sampled on 23 July. The number of recruits on each tile was counted under a dissecting mi ...
Parasitoids of European Butterflies
... Parasitoids of butterflies fall into two insect orders, Diptera and Hymenoptera. In both cases the adults are free-living and the larvae develop (whether solitarily or gregariously) by feeding on a single immature host which is killed as a result (cases of survival have occasionally been reported, es ...
... Parasitoids of butterflies fall into two insect orders, Diptera and Hymenoptera. In both cases the adults are free-living and the larvae develop (whether solitarily or gregariously) by feeding on a single immature host which is killed as a result (cases of survival have occasionally been reported, es ...
Non-target effects of insect biocontrol agents and trends in host
... Population models were developed for N. fraudator and used to estimate levels of population impact associated with particular levels of parasitism. The model indicated that field parasitism rates of 30% implied various levels of population impact depending on the weevil population’s reproductive rat ...
... Population models were developed for N. fraudator and used to estimate levels of population impact associated with particular levels of parasitism. The model indicated that field parasitism rates of 30% implied various levels of population impact depending on the weevil population’s reproductive rat ...
STATUS OF RARE WOODLAND PLANTS AND LICHENS 1.0
... light from felling or coppicing and semi-permanent or permanent glades or rides are important promoters of diversity. Coppicing produces particularly species rich, if temporary, communities (Rackham, 2003). Coppicing was a fundamental part of the character of lowland woodlands for centuries before ...
... light from felling or coppicing and semi-permanent or permanent glades or rides are important promoters of diversity. Coppicing produces particularly species rich, if temporary, communities (Rackham, 2003). Coppicing was a fundamental part of the character of lowland woodlands for centuries before ...
Love thy neighbor? reciprocal impacts between plant community
... top-down effects of herbivores may thus lead to increased community evenness and species richness (Carson and Root 2000, Hillebrand et al. 2007). Given that patterns of herbivory may be influenced by the local plant neighborhood, and damage due to herbivory can alter competitive dynamics among plants ...
... top-down effects of herbivores may thus lead to increased community evenness and species richness (Carson and Root 2000, Hillebrand et al. 2007). Given that patterns of herbivory may be influenced by the local plant neighborhood, and damage due to herbivory can alter competitive dynamics among plants ...
“Missouri Invasions” draft 11Nov00
... Zooplankton sampling and analysis. Zooplankton samples were collected with two or more vertical tows (total length 20m), using a 25cm diameter zooplankton net (mesh = 200 µm). The sample volume (982 L) should detect densities of D. lumholtzi over one per m3. The tows were pooled into one sample, ana ...
... Zooplankton sampling and analysis. Zooplankton samples were collected with two or more vertical tows (total length 20m), using a 25cm diameter zooplankton net (mesh = 200 µm). The sample volume (982 L) should detect densities of D. lumholtzi over one per m3. The tows were pooled into one sample, ana ...
Pelagic Organism Decline Progress Report: 2007 Synthesis of Results
... based primarily on information collected through August 2007. We also introduce important new information from fall 2007 (highlighted in italics) to reflect the fact that important additional progress has been made in recent months. These newer results are primarily included in the discussions of co ...
... based primarily on information collected through August 2007. We also introduce important new information from fall 2007 (highlighted in italics) to reflect the fact that important additional progress has been made in recent months. These newer results are primarily included in the discussions of co ...
Ecological Role of Dry-Habitat Chimpanzees (Pan troglodytes
... First and foremost, I would like to thank my advisory committee Kaye Reed, Leanne Nash, and Gary Schwartz for their patience, support, and guidance throughout my entire graduate career. I am especially grateful to my chair, Kaye Reed, for the immediate responses to late night emails, long-distance s ...
... First and foremost, I would like to thank my advisory committee Kaye Reed, Leanne Nash, and Gary Schwartz for their patience, support, and guidance throughout my entire graduate career. I am especially grateful to my chair, Kaye Reed, for the immediate responses to late night emails, long-distance s ...
Succession in plankton communities
... 150 µmol kg-1 more inorganic carbon than the 2120 µmol kg-1 that would be expected ...
... 150 µmol kg-1 more inorganic carbon than the 2120 µmol kg-1 that would be expected ...
Johnson habitat quality
... or we can measure variables for animals and populations in different habitats to reveal variation in habitat quality. In measuring habitats directly, we should, of course, be concerned with critical resources, such as food and nest sites, but habitat is far more than the vegetation and resources sur ...
... or we can measure variables for animals and populations in different habitats to reveal variation in habitat quality. In measuring habitats directly, we should, of course, be concerned with critical resources, such as food and nest sites, but habitat is far more than the vegetation and resources sur ...
COSEWIC assessment and status report on the Behr`s Hairstreak
... Criterion A (Decline in Total Number of Mature Individuals): Not applicable. Criterion B (Small Distribution Range and Decline or Fluctuation): Meets Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v). The EO and IAO are both below thresholds, the species is considered severely fragmented because it ...
... Criterion A (Decline in Total Number of Mature Individuals): Not applicable. Criterion B (Small Distribution Range and Decline or Fluctuation): Meets Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v). The EO and IAO are both below thresholds, the species is considered severely fragmented because it ...
Review of non-native species policy: report of the Working
... habitats are affected. Invasive non-native species also damage economic interests, such as agriculture, forestry and infrastructure, and can threaten public health. Thus the problems caused by invasive non-native species are serious; so serious that the introduction of invasive non-native species is ...
... habitats are affected. Invasive non-native species also damage economic interests, such as agriculture, forestry and infrastructure, and can threaten public health. Thus the problems caused by invasive non-native species are serious; so serious that the introduction of invasive non-native species is ...
Jaguarundi CH Petition Backup
... critical habitat is effective in promoting recovery of listed species, but the Jaguarundi has never been granted critical habitat protection. Habitat protection is the most important way that the Jaguarundi can be safeguarded in the U.S. The Jaguarundi is known to still occur in south Texas, using d ...
... critical habitat is effective in promoting recovery of listed species, but the Jaguarundi has never been granted critical habitat protection. Habitat protection is the most important way that the Jaguarundi can be safeguarded in the U.S. The Jaguarundi is known to still occur in south Texas, using d ...
Functional diversity - Centre d`étude de la forêt
... degradation (Vinther et al. 2003) and bioturbation (Solan et al. 2004) may represent patterns of resource use, but may also result from other requirements. For example, bioturbation can result from shelter building. Thus, one could produce a functional classification of organisms based on one set of ...
... degradation (Vinther et al. 2003) and bioturbation (Solan et al. 2004) may represent patterns of resource use, but may also result from other requirements. For example, bioturbation can result from shelter building. Thus, one could produce a functional classification of organisms based on one set of ...
Spatial Pattern Enhances Ecosystem Functioning in an African
... more productive than were simulated landscapes with randomly distributed mounds. The estimated means for all response variables in the over-dispersed landscape were .99.9th percentile of the means obtained from the 1,000 randomly generated landscapes (Figure 4). Because the mean values of all variab ...
... more productive than were simulated landscapes with randomly distributed mounds. The estimated means for all response variables in the over-dispersed landscape were .99.9th percentile of the means obtained from the 1,000 randomly generated landscapes (Figure 4). Because the mean values of all variab ...
Recovery Strategy for the Butler`s Gartersnake (Thamnophis butleri
... programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2002, c.29) (SARA), the federal competent ministers are responsible for the preparation of recovery strategies for listed Extirpated, Endangered, and Threatened species and are re ...
... programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2002, c.29) (SARA), the federal competent ministers are responsible for the preparation of recovery strategies for listed Extirpated, Endangered, and Threatened species and are re ...
Management plan in Estonia
... hunting, but with annual quota of only 20 speciemen, the probability is as high as 22-40%. The main cost of maintaining a viable large carnivore population is preying on domestic animals, but with current practice of livestock breeding in Estonia the risk is rather small. Among game ungulates, wolfs ...
... hunting, but with annual quota of only 20 speciemen, the probability is as high as 22-40%. The main cost of maintaining a viable large carnivore population is preying on domestic animals, but with current practice of livestock breeding in Estonia the risk is rather small. Among game ungulates, wolfs ...
- NDLScholarship
... provisions are inadequate to the task of protecting biodiversity threatened by rampant habitat destruction. Thus "[elndangered species have been used as a whipping post for the left and the right, to no one's advantage."5 Most of the dispute has centered on the ESA's ban on activities on private pro ...
... provisions are inadequate to the task of protecting biodiversity threatened by rampant habitat destruction. Thus "[elndangered species have been used as a whipping post for the left and the right, to no one's advantage."5 Most of the dispute has centered on the ESA's ban on activities on private pro ...
Conference program and abstracts. International - CITA-A
... University of Michigan Contact: [email protected] Species richness varies dramatically across the surface of the Earth. The latitudinal diversity gradient is a striking example of this variation, but many physiographically-comparable regions are characterized by disparate patterns of species divers ...
... University of Michigan Contact: [email protected] Species richness varies dramatically across the surface of the Earth. The latitudinal diversity gradient is a striking example of this variation, but many physiographically-comparable regions are characterized by disparate patterns of species divers ...
Effects of rainbow trout (Oncorhynchus mykiss)
... most commonly assumed to cause such declines, competition for food (Tyler et al. 1998b) and transfer of pathogens from trout to amphibians (Kiesecker et al. 2001) are also possible. At the landscape scale, introduced trout may reduce connectivity among amphibian populations leading to fragmentation, ...
... most commonly assumed to cause such declines, competition for food (Tyler et al. 1998b) and transfer of pathogens from trout to amphibians (Kiesecker et al. 2001) are also possible. At the landscape scale, introduced trout may reduce connectivity among amphibian populations leading to fragmentation, ...
Vernal Pool Fairy Shrimp
... Recolonization opportunities are also diminished when physical barriers, such as development or lack of vernal pool habitat, isolate populations from one another or inhibit transport of cysts. Isolated populations are potentially more susceptible to inbreeding depression, which can result in local e ...
... Recolonization opportunities are also diminished when physical barriers, such as development or lack of vernal pool habitat, isolate populations from one another or inhibit transport of cysts. Isolated populations are potentially more susceptible to inbreeding depression, which can result in local e ...
potential mechanisms underlying the displacement of native red
... for significant main effects. ANOVA was also used to test for the effect of bullfrogs (present or absent), density (low or high), and resource distribution on the amount of time spent feeding by red-legged frog tadpoles. An additional analysis, comparing the time spent moving, used a comparable ANOV ...
... for significant main effects. ANOVA was also used to test for the effect of bullfrogs (present or absent), density (low or high), and resource distribution on the amount of time spent feeding by red-legged frog tadpoles. An additional analysis, comparing the time spent moving, used a comparable ANOV ...