Document
... • In parasitism, two organisms are living together where one organism is getting all the benefit and the other organism (the host) is receiving no benefit. The host may actually be harmed. ...
... • In parasitism, two organisms are living together where one organism is getting all the benefit and the other organism (the host) is receiving no benefit. The host may actually be harmed. ...
Rapid digestion of fish prey by the highly invasive `detritivore
... provided sufficient protein for fish body maintenance, and the second followed that if protein deficiency was responsible for the loss of body condition, then would an alternative form of protein be required (Bowen, 1979), thus triggering trophic plasticity in this species. In a subsequent study, Do ...
... provided sufficient protein for fish body maintenance, and the second followed that if protein deficiency was responsible for the loss of body condition, then would an alternative form of protein be required (Bowen, 1979), thus triggering trophic plasticity in this species. In a subsequent study, Do ...
pub3248leafrustofwheat
... The disease reduces the size and number of kernels per head. Grain from severely rusted plants is lower in test weight and protein content. Losses from leaf rust may be underestimated, however, because the disease never destroys an entire crop and seldom causes severe grain shriveling. Conditions ne ...
... The disease reduces the size and number of kernels per head. Grain from severely rusted plants is lower in test weight and protein content. Losses from leaf rust may be underestimated, however, because the disease never destroys an entire crop and seldom causes severe grain shriveling. Conditions ne ...
Seed Dispersal of Bactris glaucescens by the Pacu Fish
... the flooding season. Fish were weighed, measured (length and gape size), and dissected to remove stomachs and intestines immediately after collection. Stomach and intestine contents were examined and fruits and seeds were separated from other items and identified. We considered seed dispersal to be ...
... the flooding season. Fish were weighed, measured (length and gape size), and dissected to remove stomachs and intestines immediately after collection. Stomach and intestine contents were examined and fruits and seeds were separated from other items and identified. We considered seed dispersal to be ...
and surface-adapted fish populations?
... Immigrant inviability, where individuals from foreign, ecologically divergent habitats are less likely to survive, can restrict gene flow among diverging populations and result in speciation. I investigated whether a predatory aquatic insect (Belostoma sp.) selects against migrants between cave and ...
... Immigrant inviability, where individuals from foreign, ecologically divergent habitats are less likely to survive, can restrict gene flow among diverging populations and result in speciation. I investigated whether a predatory aquatic insect (Belostoma sp.) selects against migrants between cave and ...
Teacher Answer Key - Ecology Unit Plan
... Competition (sharks are after the same fish as the humans and will often steal the humans’ catch) ...
... Competition (sharks are after the same fish as the humans and will often steal the humans’ catch) ...
B.Sc. (General) degree
... equipment, Biological control programmes in Sri Lanka, Insect rearing methods, Household pests, Demonstrations on life stages of insect vectors that are of medical importance in Sri Lanka Plant Nematology Laboratory: Soil sampling for population studies of plant parasitic nematodes; Extraction of ne ...
... equipment, Biological control programmes in Sri Lanka, Insect rearing methods, Household pests, Demonstrations on life stages of insect vectors that are of medical importance in Sri Lanka Plant Nematology Laboratory: Soil sampling for population studies of plant parasitic nematodes; Extraction of ne ...
Monitoring Fish Movement Over Ranges of Scale
... As an industrial partner in the OTN project (Ocean Tracking Network) being managed from Dalhousie University in Halifax, NS Canada, Lotek provides LAT geolocation archival tags for large scale (oceanic) movement monitoring and MAP acoustic systems for fine scale (spatial and temporal) monitoring suc ...
... As an industrial partner in the OTN project (Ocean Tracking Network) being managed from Dalhousie University in Halifax, NS Canada, Lotek provides LAT geolocation archival tags for large scale (oceanic) movement monitoring and MAP acoustic systems for fine scale (spatial and temporal) monitoring suc ...
Lake Victoria - University of Liverpool
... Barbus sp.), Bagrus sp. , Schilbe sp. , Clarias sp. all catfish and some Haplochromis spp. Since 1985 food fish catches have fallen and remained low Combined pressure exerted by these species on stocks in lakes not considered significant as they are only part time predators and no problems in ...
... Barbus sp.), Bagrus sp. , Schilbe sp. , Clarias sp. all catfish and some Haplochromis spp. Since 1985 food fish catches have fallen and remained low Combined pressure exerted by these species on stocks in lakes not considered significant as they are only part time predators and no problems in ...
Chapter 4 - OneOcean.org
... too much labor and capital in the fishery which could have been put to more efficient use in other economic sectors. And, the fish stock is most likely being drawn down below sustainable levels. An action derived from this analysis suggests that fishing effort should be decreased by 20 to 30% or mor ...
... too much labor and capital in the fishery which could have been put to more efficient use in other economic sectors. And, the fish stock is most likely being drawn down below sustainable levels. An action derived from this analysis suggests that fishing effort should be decreased by 20 to 30% or mor ...
The ecological setting of North Sea fisheries
... Archaeological evidence indicates that man has been an important fish consumer from early ages onwards and over wide geographical areas. Apparently, exploita tion of natural fish resources does rarely lead to their extinction. Yields taken by marine fisheries have proved to be sustainable for centur ...
... Archaeological evidence indicates that man has been an important fish consumer from early ages onwards and over wide geographical areas. Apparently, exploita tion of natural fish resources does rarely lead to their extinction. Yields taken by marine fisheries have proved to be sustainable for centur ...
Lakeshore Woody Habitat in Review
... three meters depth. Johnson (1993) found that bluegill selected both horizontal and vertically oriented structure over open water, with a slight preference for vertical over horizontally oriented artificial structures. Newbrey et al. (2005) found increasing complexity of branching to be positively a ...
... three meters depth. Johnson (1993) found that bluegill selected both horizontal and vertically oriented structure over open water, with a slight preference for vertical over horizontally oriented artificial structures. Newbrey et al. (2005) found increasing complexity of branching to be positively a ...
Bacterial infections from aquatic species
... 1966 and discovered 35 invasive cases, occurring in patients at an average age of 43 years, who had been treated with immune impairment systemic steroids or chemotherapy, or had acquired immunodeficiency syndrome (AIDS). Sixty percent of these patients had tenosynovitis, 17% had septic arthritis and ...
... 1966 and discovered 35 invasive cases, occurring in patients at an average age of 43 years, who had been treated with immune impairment systemic steroids or chemotherapy, or had acquired immunodeficiency syndrome (AIDS). Sixty percent of these patients had tenosynovitis, 17% had septic arthritis and ...
lake richmond fish survey
... within the thrombolites. The damage that this feral species is causing to the iconic thrombolites requires urgent assessment. Long-term trapping to eliminate the population is strongly recommended, if done within the context of the management plan for the Rockingham Lakes Regional Park Management Pl ...
... within the thrombolites. The damage that this feral species is causing to the iconic thrombolites requires urgent assessment. Long-term trapping to eliminate the population is strongly recommended, if done within the context of the management plan for the Rockingham Lakes Regional Park Management Pl ...
Changing Communities of Baltic Coastal Fish
... Sea, Sea of Azov, and their tributaries. They generally inhabit shallow areas of the sea and lower to middle reaches of rivers in brackish or fresh water, but have been known to overwinter in water as deep as 60m. Round gobies are voracious feeders and consume a wide variety of benthic organisms. In ...
... Sea, Sea of Azov, and their tributaries. They generally inhabit shallow areas of the sea and lower to middle reaches of rivers in brackish or fresh water, but have been known to overwinter in water as deep as 60m. Round gobies are voracious feeders and consume a wide variety of benthic organisms. In ...
2004-05 New
... stocking (Haas and Schaeffer, 1992), the bay was further subjected to fluctuating nutrient levels and a wave of invading non-native species such as zebra mussels, white perch (Morone americana), round goby, and zooplankton species (Cercopagis pengoi, Bythotrephes). The invasion of zebra mussels in e ...
... stocking (Haas and Schaeffer, 1992), the bay was further subjected to fluctuating nutrient levels and a wave of invading non-native species such as zebra mussels, white perch (Morone americana), round goby, and zooplankton species (Cercopagis pengoi, Bythotrephes). The invasion of zebra mussels in e ...
Myxobolus cerebralis
Myxobolus cerebralis is a myxosporean parasite of salmonids (salmon, trout, and their allies) that causes whirling disease in farmed salmon and trout and also in wild fish populations. It was first described in rainbow trout in Germany a century ago, but its range has spread and it has appeared in most of Europe (including Russia), the United States, South Africa and other countries. In the 1980s, M. cerebralis was found to require a tubificid oligochaete (a kind of segmented worm) to complete its life cycle. The parasite infects its hosts with its cells after piercing them with polar filaments ejected from nematocyst-like capsules.Whirling disease afflicts juvenile fish (fingerlings and fry) and causes skeletal deformation and neurological damage. Fish ""whirl"" forward in an awkward, corkscrew-like pattern instead of swimming normally, find feeding difficult, and are more vulnerable to predators. The mortality rate is high for fingerlings, up to 90% of infected populations, and those that do survive are deformed by the parasites residing in their cartilage and bone. They act as a reservoir for the parasite, which is released into water following the fish's death. M. cerebralis is one of the most economically important myxozoans in fish, as well as one of the most pathogenic. It was the first myxosporean whose pathology and symptoms were described scientifically. The parasite is not transmissible to humans.