The Efficacy of Marine Protected Areas in Southern Leyte
... Biological diversity within the oceans is endangered worldwide and so management practices need to be undertaken to prevent further degradation of marine systems. The aim of this research was to quantify the success of a small-scale, community based marine protected area (MPA) in Southern Leyte, Phi ...
... Biological diversity within the oceans is endangered worldwide and so management practices need to be undertaken to prevent further degradation of marine systems. The aim of this research was to quantify the success of a small-scale, community based marine protected area (MPA) in Southern Leyte, Phi ...
Comparison of field methods for measuring surface
... that define habitat complexity, and the scale dependence of these interactions, have resulted in a diversity of definitions and ways of measuring habitat complexity (McCoy & Bell 1991, Sebens 1991). In tropical systems, few studies have addressed the relationship between habitat complexity and reef ...
... that define habitat complexity, and the scale dependence of these interactions, have resulted in a diversity of definitions and ways of measuring habitat complexity (McCoy & Bell 1991, Sebens 1991). In tropical systems, few studies have addressed the relationship between habitat complexity and reef ...
Parasites, ecosystems and sustainability: an ecological and complex
... lies a complexity that reflects the degree of dependence, of virulence, or both, and how these vary in time and space. The notion of dependence is relative, not absolute. As pointed out by Smyth (1994), a particular parasite may lie somewhere along the scale of 0% metabolic dependence (or being abso ...
... lies a complexity that reflects the degree of dependence, of virulence, or both, and how these vary in time and space. The notion of dependence is relative, not absolute. As pointed out by Smyth (1994), a particular parasite may lie somewhere along the scale of 0% metabolic dependence (or being abso ...
Atlantic Salmon (Salmo salar) imperilment in North Eastern North
... physiological “smolt window,” and the timing of seawater entry with environmental conditions such as temperature, food, and predators, or an ecological “environmental window.” ...
... physiological “smolt window,” and the timing of seawater entry with environmental conditions such as temperature, food, and predators, or an ecological “environmental window.” ...
interactive effects of predation and dispersal on
... predator communities can promote regional coexistence among species at lower trophic levels that cannot coexist locally (Shurin 2000b). For instance, species of amphibians, insects, and zooplankton often segregate between ponds with and without fish or salamander predators as a result of chains of i ...
... predator communities can promote regional coexistence among species at lower trophic levels that cannot coexist locally (Shurin 2000b). For instance, species of amphibians, insects, and zooplankton often segregate between ponds with and without fish or salamander predators as a result of chains of i ...
Fish Survey and Aquatic Assessment Report for Horsehead Lake
... earlier this year, trap nets were used as the primary means of collecting data on fish species. Due to unseasonably warm weather and variable ecological conditions, however, the Michigan State University team suggested expanding the research and advancing our understanding of the ecology of Horsehea ...
... earlier this year, trap nets were used as the primary means of collecting data on fish species. Due to unseasonably warm weather and variable ecological conditions, however, the Michigan State University team suggested expanding the research and advancing our understanding of the ecology of Horsehea ...
INFORMATION SHEET
... water system. The NFH consists of a fish ladder for adult salmon and steelhead, four holding ponds for adult fish, a spawning deck for egg removal and fertilization, two hatchery buildings (No. 1 and 2), six 10-ft by 400-ft raceways for rearing, and ancillary operations. The NFH’s current goal for f ...
... water system. The NFH consists of a fish ladder for adult salmon and steelhead, four holding ponds for adult fish, a spawning deck for egg removal and fertilization, two hatchery buildings (No. 1 and 2), six 10-ft by 400-ft raceways for rearing, and ancillary operations. The NFH’s current goal for f ...
Materials and Methods - Smithsonian Tropical Research Institute
... increased sedimentation and erosion, excess nutrient flow, altered food chains and changes in tidal flow (Alongi, 2002). These physical impacts may yet prove to have extensive ecological repercussions, which have only recently begun to be examined. Yet it is the possible connection between mangroves ...
... increased sedimentation and erosion, excess nutrient flow, altered food chains and changes in tidal flow (Alongi, 2002). These physical impacts may yet prove to have extensive ecological repercussions, which have only recently begun to be examined. Yet it is the possible connection between mangroves ...
AN ECOLOGICAL OVERVIEW OF POECILIID FISHES Gary K. Meffe
... mangrove swamps. Within deserts alone, poeciliids cover a wide habitat range, including rocky and fluctuating arroyos, constant and chemically harsh springs, small to large rivers, productive cienegas, and a variety of man-made ecosystems. The diversity of habitats used by the family and individual ...
... mangrove swamps. Within deserts alone, poeciliids cover a wide habitat range, including rocky and fluctuating arroyos, constant and chemically harsh springs, small to large rivers, productive cienegas, and a variety of man-made ecosystems. The diversity of habitats used by the family and individual ...
On the methodology of feeding ecology in fish
... considered final, but best to fix modalities for further studies on resource utilization by fish. ...
... considered final, but best to fix modalities for further studies on resource utilization by fish. ...
Strategic Plan for Lake Champlain Fisheries Miscellaneous Publication 2010-03
... Fisheries between Canada and the United States, which was ratified on October 11, 1955. It was organized in April 1956 and assumed its duties as set forth in the Convention on July 1, 1956. The Commission has two major responsibilities: first, develop coordinated programs of research in the Great La ...
... Fisheries between Canada and the United States, which was ratified on October 11, 1955. It was organized in April 1956 and assumed its duties as set forth in the Convention on July 1, 1956. The Commission has two major responsibilities: first, develop coordinated programs of research in the Great La ...
A Conceptual Framework For Conservation Hatchery
... annually into the Pacific Ocean from North American hatcheries. On the Columbia River alone, nearly 100 hatcheries produce about 200 million fish, which provide up to 80% of the fish in several key fisheries. However, despite the great success of production hatcheries, the final decades of the Twent ...
... annually into the Pacific Ocean from North American hatcheries. On the Columbia River alone, nearly 100 hatcheries produce about 200 million fish, which provide up to 80% of the fish in several key fisheries. However, despite the great success of production hatcheries, the final decades of the Twent ...
IN VITRO CINNAMON AGAINST BACTERIAL PATHOGENS OF FISH
... due to elevated mortality rates and decreased productivity1. However, microorganisms which are naturally occurring as opportunistic pathogens invade the tissue of a host and render them susceptible to infection2. Bacterial infections of fish and fish products may influence human health either direct ...
... due to elevated mortality rates and decreased productivity1. However, microorganisms which are naturally occurring as opportunistic pathogens invade the tissue of a host and render them susceptible to infection2. Bacterial infections of fish and fish products may influence human health either direct ...
Michigan Department of Natural Resources 2005-10 Status of the Fishery Resource Report
... Game fish species such as walleye, northern pike, smallmouth bass, and largemouth bass comprised 56.7% of the catch by number. Bluegills, pumpkinseed sunfish, and yellow perch were also well represented in the survey totals. Only 1 muskellunge was captured. Walleye ranged in length from 7-25 inches ...
... Game fish species such as walleye, northern pike, smallmouth bass, and largemouth bass comprised 56.7% of the catch by number. Bluegills, pumpkinseed sunfish, and yellow perch were also well represented in the survey totals. Only 1 muskellunge was captured. Walleye ranged in length from 7-25 inches ...
life history and reproduction of fish
... -fertility = reproductive performance of an individual or a population, often measured as number of viable offspring produced per spawning season fecundity = number of eggs an animal produces during each reproductive cycle; the potential reproductive capacity of an organism or population. Usually in ...
... -fertility = reproductive performance of an individual or a population, often measured as number of viable offspring produced per spawning season fecundity = number of eggs an animal produces during each reproductive cycle; the potential reproductive capacity of an organism or population. Usually in ...
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.