Nile Tilapia Oreochromis niloticus
... Intensively farmed fish can lead to the excretion of high concentrations of nutrients in the water, a process known as eutrophication. Increased nitrate and phosphate levels (from faeces or uneaten food) can cause algal blooms (including some toxic species) and mass fish mortality events. In Lago Pa ...
... Intensively farmed fish can lead to the excretion of high concentrations of nutrients in the water, a process known as eutrophication. Increased nitrate and phosphate levels (from faeces or uneaten food) can cause algal blooms (including some toxic species) and mass fish mortality events. In Lago Pa ...
Panthera pardus ssp. saxicolor, Persian Leopard
... http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T15961A5334217.en Copyright: © 2015 International Union for Conservation of Nature and Natural Resources Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written permission from the copyright hol ...
... http://dx.doi.org/10.2305/IUCN.UK.2008.RLTS.T15961A5334217.en Copyright: © 2015 International Union for Conservation of Nature and Natural Resources Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written permission from the copyright hol ...
Ecological Impacts of Non-native Freshwater Fishes (Cucherousset
... fishes across multiple levels of biological organization (ranging from the genome to the ecosystem) and conclude with a prospectus of needed areas of scientific inquiry to advance this understanding. Our investigation focuses on the negative impacts of fish introductions, although we readily acknowl ...
... fishes across multiple levels of biological organization (ranging from the genome to the ecosystem) and conclude with a prospectus of needed areas of scientific inquiry to advance this understanding. Our investigation focuses on the negative impacts of fish introductions, although we readily acknowl ...
reprint
... particular females. Whilst not affecting the overall comparisons between species, this could have been partly responsible for the large heterogeneity between individuals. However, in general, females did have access to healthy plants of both P. punctata and P. rubra, and it seems likely therefore th ...
... particular females. Whilst not affecting the overall comparisons between species, this could have been partly responsible for the large heterogeneity between individuals. However, in general, females did have access to healthy plants of both P. punctata and P. rubra, and it seems likely therefore th ...
Species disc. Concept
... in case no other information were available. If they had more information than morphology, they adapted their species concepts accordingly. ...
... in case no other information were available. If they had more information than morphology, they adapted their species concepts accordingly. ...
Markov Chain Analysis of Succession in a Rocky Subtidal Community
... the corresponding cellular automata. Models with time-invariant transition probabilities are homogeneous, finite-state Markov chains. Here, we use such a chain to analyze succession in a rocky subtidal community. A detailed statistical analysis of the model that examined the effects of spatial and t ...
... the corresponding cellular automata. Models with time-invariant transition probabilities are homogeneous, finite-state Markov chains. Here, we use such a chain to analyze succession in a rocky subtidal community. A detailed statistical analysis of the model that examined the effects of spatial and t ...
Plant–pollinator interactions and the assembly of plant
... plant–pollinator interactions, and we then address the potential role of phylogenetic approaches in this area. Three main processes by which plant-animal interactions influence community assembly Habitat filtering Ecological sorting, or habitat filtering (see Glossary), predicts that the environment ...
... plant–pollinator interactions, and we then address the potential role of phylogenetic approaches in this area. Three main processes by which plant-animal interactions influence community assembly Habitat filtering Ecological sorting, or habitat filtering (see Glossary), predicts that the environment ...
Can Nordic amphibians be saved?
... Amphibians are particularly threatened by the fragmentation and destruction of their habitat. Ponds and wetlands have widely been drained, filled in, or built over. If patches of suitable habitat become separated by longer distances, populations are no longer able to spread or interbreed. Small, iso ...
... Amphibians are particularly threatened by the fragmentation and destruction of their habitat. Ponds and wetlands have widely been drained, filled in, or built over. If patches of suitable habitat become separated by longer distances, populations are no longer able to spread or interbreed. Small, iso ...
Ecology and Evolution of Adaptive Morphological Variation in Fish
... Harvell1990). Various morphological structures in prey organisms’ function as efficient adaptations against predation, and these morphological defenses could be either constitutive or environmentally induced. Furthermore, recent findings have shown that predation may be involved in creating variatio ...
... Harvell1990). Various morphological structures in prey organisms’ function as efficient adaptations against predation, and these morphological defenses could be either constitutive or environmentally induced. Furthermore, recent findings have shown that predation may be involved in creating variatio ...
Species pool size and invasibility of island communities: a null
... differences in invasibility, holding local (plot-level) richness constant. The model used here is a generalized version of that in Herben et al. (2004). It is a dynamic lottery model, based on drawing individuals from two pools of identical species (native and exotic), with lottery processes of dist ...
... differences in invasibility, holding local (plot-level) richness constant. The model used here is a generalized version of that in Herben et al. (2004). It is a dynamic lottery model, based on drawing individuals from two pools of identical species (native and exotic), with lottery processes of dist ...
SOUTH DElTfl UlATfR R G f ~...
... know whether the impact of reduced flows on resident fishery is as great as the impact of the recent proliferation of non-native aquatic plants, for example. Higher flows would help somewhat to control these plants, but not in oxbows and other backwaters. Massive hyacinth growths have impeded migrat ...
... know whether the impact of reduced flows on resident fishery is as great as the impact of the recent proliferation of non-native aquatic plants, for example. Higher flows would help somewhat to control these plants, but not in oxbows and other backwaters. Massive hyacinth growths have impeded migrat ...
Shifts of the feeding niche along the size dimension of three
... Introduction A description of the trophic relationships among juvenile fish species is fundamental for understanding their functional role in the ecosystem (Meng and Powell 2003; Hajisamae 2009; Florin and Lavados 2010). Competition can increase the diversity of resource use within a natural populat ...
... Introduction A description of the trophic relationships among juvenile fish species is fundamental for understanding their functional role in the ecosystem (Meng and Powell 2003; Hajisamae 2009; Florin and Lavados 2010). Competition can increase the diversity of resource use within a natural populat ...
A fast PCR assay to identify Meloidogyne hapla, M
... In Dutch agriculture, an increase of populations of the root-knot nematodes Meloidogyne hapla, M. chitwoodi, and the recently described M. fallax has been observed in recent years. The most affected crops are potato, carrot, beet, and scorzonera. The seriousness of the situation is seen from the fac ...
... In Dutch agriculture, an increase of populations of the root-knot nematodes Meloidogyne hapla, M. chitwoodi, and the recently described M. fallax has been observed in recent years. The most affected crops are potato, carrot, beet, and scorzonera. The seriousness of the situation is seen from the fac ...
The role of past and present management in the rural landscape
... habitats results in the biological impoverishment of what is left (Harrison & Bruna 1999). The species-area relationship is a long known ecological theory which states that smaller areas of habitat support fewer species and vice versa (Arrhenius 1921), mediated by the effect of distance from a large ...
... habitats results in the biological impoverishment of what is left (Harrison & Bruna 1999). The species-area relationship is a long known ecological theory which states that smaller areas of habitat support fewer species and vice versa (Arrhenius 1921), mediated by the effect of distance from a large ...
The Use of Extant Non-Indigenous Tortoises as a Restoration Tool
... island (North & Bullock 1986). We believe, therefore, that the loss of tortoises would have initiated this degeneration of the native grassland community, to the extent that modern botanists did not include it in their classification of Mascarene habitats (Vaughan & Wiehe 1937). Today, remnant patch ...
... island (North & Bullock 1986). We believe, therefore, that the loss of tortoises would have initiated this degeneration of the native grassland community, to the extent that modern botanists did not include it in their classification of Mascarene habitats (Vaughan & Wiehe 1937). Today, remnant patch ...
Changing Seascapes, Stochastic Connectivity, and Marine
... accurate determinations of connectivity are critical to our ability to govern and maintain ecological systems (Possingham et al. 2000; Lubchenco et al. 2003). However, regardless of its importance, connectivity remains poorly understood for many systems. This is especially true for one particular pr ...
... accurate determinations of connectivity are critical to our ability to govern and maintain ecological systems (Possingham et al. 2000; Lubchenco et al. 2003). However, regardless of its importance, connectivity remains poorly understood for many systems. This is especially true for one particular pr ...
The Endangered Species Act: What Do We Mean by Species?
... following hybridization. Outbreeding depression can occur in the immediate hybrids, in subsequent hybrid generations or in backcrosses to the parent species. 49 Yet, hybridization can be an important tool in conserving endangered species. Some three years later, the problem of hybrids between subspe ...
... following hybridization. Outbreeding depression can occur in the immediate hybrids, in subsequent hybrid generations or in backcrosses to the parent species. 49 Yet, hybridization can be an important tool in conserving endangered species. Some three years later, the problem of hybrids between subspe ...
Annotated Literature Review
... name implies, it was imported over here and somehow made its way into the river system, and now has taken over. There are multiple ways that this fish may have got into the river, and that is probably where the research will start. They could have been introduced accidentally or intentionally, by so ...
... name implies, it was imported over here and somehow made its way into the river system, and now has taken over. There are multiple ways that this fish may have got into the river, and that is probably where the research will start. They could have been introduced accidentally or intentionally, by so ...
Modeling Populations2
... The interaction between alleles and environment shapes the direction of the change in allele frequencies resulting in evolution of adaptable traits. ...
... The interaction between alleles and environment shapes the direction of the change in allele frequencies resulting in evolution of adaptable traits. ...
Study of fragmented fossil diatoms using an invariant
... parasitology of the wild “botete diana” show the existence of a diverse parasitic fauna. Monogeneans and digeneans have been identified and when the fish are transferred to captivity, parasites with a direct life - cycle reproduce rapidly resulting in parasitic diseases that can lead to fish mortali ...
... parasitology of the wild “botete diana” show the existence of a diverse parasitic fauna. Monogeneans and digeneans have been identified and when the fish are transferred to captivity, parasites with a direct life - cycle reproduce rapidly resulting in parasitic diseases that can lead to fish mortali ...
Evaluating the “recovery level” of endangered species without prior
... by the mongoose (Amami rabbit, the Otton frog, Amami tip-nosed frog, and Amami Ishikawa’s frog) at four time points ranging from 2003 to 2011. We estimated the carrying capacities of these species using the logistic growth model combined with the effects of mongoose predation and environmental heter ...
... by the mongoose (Amami rabbit, the Otton frog, Amami tip-nosed frog, and Amami Ishikawa’s frog) at four time points ranging from 2003 to 2011. We estimated the carrying capacities of these species using the logistic growth model combined with the effects of mongoose predation and environmental heter ...
IMPACT: Toward a framework for understanding the
... impact is that any biomass (or space, or energy) controlled by the invader constitutes resources no longer available to competitors or prey. Some studies have tracked the abundance of an invader at a single site as a measure of the increasing impact at that site (e.g., Anable et al. 1992). However, ...
... impact is that any biomass (or space, or energy) controlled by the invader constitutes resources no longer available to competitors or prey. Some studies have tracked the abundance of an invader at a single site as a measure of the increasing impact at that site (e.g., Anable et al. 1992). However, ...