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Topic: Piscivorous

In the News (Thu 31 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Interactions between fish and aquatic macrophytes in inland waters
		The favourable effect of macrophytes on the recruitment of piscivorous perch is shown by the increasing size of perch during the plant expansion in the lake.
		Once a fish assemblage with piscivorous perch and pike is established, this favours the maintenance of abundant submersed macrophytes as the piscivores keep in check the zooplankton-feeding and bottom-feeding cyprinids (Scheffer, 1990).
		(1995) pointed out that the potential indirect effect of piscivores reducing the predation pressure upon grazing zooplankton through behavioural changes of zooplanktivores may be an important mechanism in enhancing the stability of submersed macrophytes in shallow lakes.
	www.fao.org /DOCREP/006/X7580E/X7580E06.htm (2008 words)

	abstracts
		All early piscivores were hatched early in the summer, but many early-hatched members of the 1994 cohort did not shift to piscivory in their first summer of life.
		The life history characteristics and trophic interactions of fish species that were predominantly zooplanktivorous and ultimately piscivorous were contrasted to assess their effect on interactions between cohorts of age-0 fish and zooplankton.
		Ultimately piscivorous fish species were found to have a lower potential to affect zooplankton communities because of low reproductive potential and rapid trophic ontogeny.
	www.yale.edu /post_lab/people/post_abstracts.html (3160 words)

	[No title]
		Of the 12,487 SRB salmonids detected at Bonneville Dam, the percentages subsequently detected on piscivorous bird colonies in the Columbia River estuary ranged from 6.1% for fall chinook salmon to 24.2% for steelhead (Table 3).
		Of the 34,384 non-SRB salmonids detected at Bonneville Dam the percentages subsequently detected on piscivorous bird colonies in the Columbia River estuary ranged from 2.3 for fall chinook salmon to 13.4% for coho salmon.
		Percentages of these salmonids that were subsequently detected on piscivorous bird colonies in the Columbia River estuary ranged from 2.0% for chinook salmon of unknown run-type to 9.3% for coho salmon (Table 4).
	www.nwfsc.noaa.gov /research/divisions/fed/avianpredation2001.htm (2635 words)

	Haertel_etal_02 (Site not responding. Last check: 2007-09-19)
		For the latter point, piscivorous and non-piscivorous fish population sizes were assessed by multiple mark-recapture experiments and piscivorous consumption was quantified by bioenergetics modelling.
		Piscivorous fish biomass accounted for about 30 % of total fish biomass, and top-down control of third trophic level biomass was intense.
		While pike predation was mainly restricted to the littoral zone, piscivorous perch foraged in the open water during daytime.
	www.uni-konstanz.de /fish-ecology/Haertel_etal_02.html (299 words)

	2005 Draft Season Summary
		We initiated a study in 1997 to investigate the impacts of piscivorous colonial waterbirds on the survival of juvenile salmonids (Oncorhynchus spp.) in the lower Columbia River (Roby et al.
		Terns, cormorants, and pelicans were strictly piscivorous, whereas the three gull species consumed a diverse array of food types.
		Colony size and diet composition of piscivorous waterbirds on the lower Columbia River: Implications for losses of juvenile salmonids to avian predation.
	www.columbiabirdresearch.org /Background.htm (2147 words)

	Salt Marsh Productivity
		Piscivorous fishes regularly entered the marsh via creeks and ditches to prey upon marsh fishes, and piscivorous birds aggregated following major fish migrations to the marsh surface or to deep habitats.
		Pronounced peaks in piscivorous fish CPUE occurred within the impoundment in Jul, Sep, Apr, and Jun. During low water levels in Dec - Mar, piscivorous fish CPUE was low despite the high concentration of fish in deep habitats.
		Piscivorous fish may not have been able to take advantage of increased prey denisties during this period due to low activity as a result of low winter water temperatures.
	cars.er.usgs.gov /posters/Coastal_Ecology/Salt_Marsh_Productivity/salt_marsh_productivity.html (692 words)

	CSIRO PUBLISHING - Marine & Freshwater Research
		Abundances of piscivorous fish were estimated, the contribution of fish to their diets was measured and the trophic link between these fish and seagrass beds was assessed with stable isotopes.
		Piscivorous fishes were common in seagrass and included eight species from seven families (33% by abundance).
		The propensity for piscivorous fish to include seagrass-associated fish in their diets, their perennial presence in seagrass and the strong putative contribution by seagrass to their nutrition, suggest that seagrass habitats can be valuable habitat for piscivorous fishes.
	www.publish.csiro.au /?paper=MF05082 (281 words)

	Inter Research » MEPS » v222 » p279-290
		There is considerable evidence that, in addition to large piscivorous fishes, small juvenile fishes are extensively preyed upon both by juveniles of the large piscivorous species and by a range of other small species that include a large component of fish in their diets.
		Not only are small piscivores numerous, but because of their size they are much more likely to access shallow waters than large piscivores.
		Even when the full range of piscivorous fishes are considered, it is not clear that the question of the abundance of piscivores in shallow waters should be the real focus of interest.
	www.int-res.com /abstracts/meps/v222/p279-290 (385 words)

	Jennifer Newbrey
		Evidence for long-term abundance fluctuations of piscivorous birds in North Dakota from a fossil record of fish populations responding to climate change.
		Piscivorous bird species richness was highest on large lakes with a high pH.
		Many species of piscivorous birds were common and widespread regardless of the degree of human development, indicating that habituation to humans may be occurring.
	www.ndsu.edu /ndsu/jnewbrey (1462 words)

	IRRITATOR THE PISCIVOROUS
		On 10/28/96, Darren Naish says: > Dino-artist Steve White has suggested (basing his logic on the idea > that _Irritator_ was a piscivore) that the animal may have had big > intermeshing teeth like, say, the pterosaur _Caeradactylus_, but > this is also merely speculative.
		If this association is indeed the root of his perception of its piscivorous nature, the idea stems from the much-publicized description of _Baryonyx_ as a piscivore, since it was discovered with the remains of partly digested fish scales inside its ribcage; its semi-conical teeth and elongate crocodile-like snout added to the idea.
		But to call it (and through association, all its relatives) piscivorous when it was more likely simply an opportunistic omnivore, is both imprecise and misleading.
	dml.cmnh.org /1996Nov/msg00067.html (442 words)

	Conservation Ecology: Considering other consumers:fisheries, predators, and Atlantic herring in the Gulf of Maine (Site not responding. Last check: 2007-09-19)
		In addition, piscivorous fish and seabirds are important predators of herring.
		In the present study, by estimating the consumption of herring by marine mammals, we aimed to quantitatively assess the importance of herring as a prey species for marine mammal predators in the Gulf of Maine.
		Understanding the significance of consumption by these large predators and by other predators such as piscivorous fish is critical for determining whether current levels of resource extraction are appropriate.
	sunsite.wits.ac.za /eco/vol7/iss1/art2/main.html (5237 words)

	Jennifer Newbrey 2001
		The objectives of this study were to determine the influence of lake characteristics, cottage development, and human disturbance on habitat selection of 14 species of piscivorous birds.
		Fifty-three lakes located primarily in Vilas and Oneida Counties were randomly selected and surveyed for the presence of each species along shoreline transects in a boat or canoe.
		Our results suggest that many species of piscivorous birds were common and widespread including common loons, great blue herons, bald eagles, and belted kingfishers (Ceryle alcyon) regardless of the degree of human development.
	www.uwsp.edu /cnr/wicfru/2001/Projects/JNewbrey.htm (305 words)

	Caspian Tern EA comments by ABC and others
		This 3-year study will analyze predation rates of various piscivorous birds at dam sites, how these affect salmonid survival, and cost-benefit analyses of these actions, in addition to seeking out a better understanding of the population dynamic of several bird species in the region.
		While there is no doubt that cormorants and terns are effective pursuit piscivores, their preference for the slowest or most visible prey may considerably bias the estimations being used to calculate the total number of salmonids being consumed.
		There is no documentation of the actual effects on piscivorous birds, bird predation in the context of other sources of salmonid mortality, the cost-effectiveness of this program, how WS uses differing methods of control, when lethal measures are taken, or the diet of piscivorous birds.
	www.abcbirds.org /policy/tern_comments.htm (3331 words)

	The strategy used by some piscivorous cone snails to capture their prey: the effects of their venoms on vertebrates and ... (Site not responding. Last check: 2007-09-19)
		The strategy used by some piscivorous cone snails to capture their prey: the effects of their venoms on vertebrates and on isolated neuromuscular preparations
		The study of their strategy to capture the prey and details of their radula's morphology revealed that all of them used a `hook and line' strategy which consists of immobilizing the prey rapidly before engulfing it.
		The venoms from these piscivorous species clearly elicit, when injected into fish, an excitotoxic shock characterized by a sudden tetanus of the prey.
	www1.elsevier.com /cdweb/views/article.htt?jnl=00410101&iss=7&vol=37&pii=S004101019800227 (288 words)

	Yale Department of Ecology & Evolutionary Biology
		Theory predicts that a large cohort of ultimately piscivorous fish (e.g., largemouth bass) can strongly influence pelagic community structure, first through zooplanktivory and then through piscivory as the cohort progresses through its trophic ontogeny.
		My work with largemouth bass confirms theoretical predictions that piscivorous fish can affect food web structure at multiple temporal scales; however, it also shows that direct effects of ultimately piscivorous fish on zooplankton community structure are short-lived because largemouth bass move rapidly from feeding on zooplankton to feeding on benthic invertebrates and fish.
		I have also worked to combine long-term population data and with short-term mechanistic observations to evaluate mechanisms influencing recruitment of largemouth bass through multiple life history stages.
	www.yale.edu /eeb/post/research.htm (1647 words)

	NAA :: National Aquaculture Association :: One Industry, One Voice
		Piscivorous birds can cause significant predation on farm raised fish and shellfish.
		Birds may also serve as disease vectors spreading pathogens amongst fish farms or transferring pathogens from the wild to a fish farm.
		Control of piscivorous birds can be difficult and expensive.
	www.nationalaquaculture.org /pages/bird.html (272 words)

	Factors Influencing Lacustrine Habitat Selection of Piscivorous Birds of Northern Wisconsin (Site not responding. Last check: 2007-09-19)
		The objective of this study was to determine the influence of these four factors on habitat selection by 14 species of piscivorous birds using resource selection functions.
		Many species of piscivorous birds were common and widespread regardless of the degree of human development, which may indicate that some habituation to humans may be occurring.
		In addition, density dependent factors may have precluded identification of optimal lake characteristics for some piscivorous birds species due to habitat saturation.
	www.uwsp.edu /cnr/wicfru/2002/Projects/JNewbrey.htm (265 words)

	Surface Water Ambient Toxics Monitoring Program (SWAT), Bureau of Land and Water Quality, Maine Department of ...
		Assessing the impacts of methylmercury on piscivorous wildlife using a wildlife criterion value based on the Common Loon, 1998-2002
		Assessing the impacts of methylmercury on piscivorous wildlife using a wildlife criterion value based on the Common Loon, 1998-2003
		There are also separate full reports of the 'Loon Effects Study', summarized in the Lakes Module, and a report of the 'Caged Mussel Dioxin Bioassay' and 'Caged Mussel PCB Study', summarized in the Special Studies module.
	www.state.me.us /dep/blwq/docmonitoring/swat/older_materials.htm (538 words)

	Party Fish and some amazing cards
		Piscivorous has 2h 2d (four of a kind, twos).
		Piscivorous checks, BB bets, UTG folds, UTG+2 calls, MP2 calls $2.50 (All-In), MP3 folds, CO calls, Button folds, Piscivorous calls, BB calls, UTG+2 calls.
		Piscivorous checks, BB bets, UTG+2 folds, CO calls, Piscivorous calls.
	www.internettexasholdem.com /phpbb2/-vp121075.html (724 words)

	Seattle Audubon Society \| Piscivorous Birds
		Piscivorous (or fish-eating) birds are often blamed for declines in fish populations in our region.
		For now, however, the Terns will continue to nest on East Sand Island where they are guaranteed at least 6 acres of suitable habitat.
		Seattle Audubon has identified eleven habitats at risk that are critical to the survival of the birds and wildlife we care about.
	seattleaudubon.org /conservation.cfm?id=66 (826 words)

	ARS \| Publication request: CAN MANIPULATING WATER COLOR DETER PISCIVOROUS BIRD ACTIVITY WITHIN AN ARTIFICIAL ENVIRONMENT (Site not responding. Last check: 2007-09-19)
		This study was an attempt to test and predict piscivorous bird use and avoidance within an artificial habitat (fish ponds).
		Preassessment of ponds were classified as 'preferred' or 'avoided' by piscivorous birds (namely, double-crested cormorants, great blue herons, and great egrets).
		Ecological significance of these findings within an artificial environment should be tested within these avian's natural habitats and potentially could be used to predict probability of piscivorous bird use.
	www.ars.usda.gov /research/publications/publications.htm?seq_no_115=196770 (350 words)

	A. piscivorous Age Records - Experts Forum at VenomousReptiles.org
		In some of my old Books, I have seen cases of Cottonmouth Living to the Ripe Old Age of 25 Years.
		I am asking this, because the Snake I found Dead in the Road the other Morning, looked to be very, very Old.
		Check our help page for help using, or send questions, comments, or suggestions to the Manager.
	www.venomousreptiles.org /forums/Experts/25360 (773 words)

	Kehde: Opportunistic white bass can turn voraciously piscivorous 05/29/05
		For as long as several old-time anglers around here can remember, stretching back into the early 1970s, Memorial Day has marked a significant juncture in the yearly goings on of the white bass at Perry Lake.
		White bass, however, are exceeding opportunistic feeders, and in a wink, they can turn voraciously piscivorous.
		For instance, during one of those rapid gastronomical changes around Memorial Day, an area angler once witnessed a 14-inch white bass attempting to engulf an 8-inch channel catfish.
	www.cjonline.com /stories/052905/out_nedkehde.shtml (773 words)

	IngentaConnect THE PISCIVOROUS BARBS OF LAKE TANA (ETHIOPIA): MAJOR QUESTIONS ON... (Site not responding. Last check: 2007-09-19)
		Preliminary data suggest that the major prey species of these piscivores (up to 90 cm length), in contrast to previous reports, is not Barbus trispilopleura, but at least two other diploid `small barb' species (< 10 cm).
		Being the major target of commercial fisheries, knowledge on these piscivorous fish stocks and their prey species is required for aiming at sustainable fisheries.
		Preliminary data show a serious decline of fish stocks, most probably largely due to overexploiting their spawning grounds.
	www.ingentaconnect.com /content/brill/njz/2000/00000050/00000002/art00008 (249 words)

	Rapid evolution of muscle fibre number in post-glacial populations of Arctic charr Salvelinus alpinus -- Johnston et ...
		The specimens of piscivorous (PI), large benthic (LB), planktivorous (PL) and dwarf benthic (DB) morph illustrated are close to the maximum body size found.
		The data points represent dwarf benthic morphs (open circles), planktivorous morphs (open triangles, large benthic morphs (filled circles) and piscivorous morphs (filled triangles).
		Piscivorous morphs, 35.8 cm FL (C) and 50.6 cm (D).
	jeb.biologists.org /cgi/content/full/207/25/4343 (8040 words)

	IngentaConnect Food consumption and growth of two piscivorous fishes, the mandar...
		IngentaConnect Food consumption and growth of two piscivorous fishes, the mandar...
		Food consumption and growth of two piscivorous fishes, the mandarin fish and the Chinese snakehead
		You will be able to remove this item from your shopping cart at any time before you have completed check-out.
	www.ingentaconnect.com /content/ap/jb/1998/00000053/00000005/art00772 (274 words)

	USTFA Policies
		Piscivorous birds can cause significant predation on farm raised trout.
		Birds may serve as pathogen vectors spreading pathogens amongst fish farms or transferring pathogens from the wild to a fish farm.
		Depredation permits can be obtained but these are not usually timely or effective.
	www.ustfa.org /industry/policy.html (1541 words)

	A Summary of the Available Tissue Quality Criteria and Guidelines for the Protection of Wildlife
		Non-carcinogenic final fish flesh criteria for piscivorous wildlife
		1 in 100 cancer risk criteria for piscivorous wildlife
		Unfiltered, sum of all formulations,wet weight, in whole fish to protect birds and mammals
	wvlc.uwaterloo.ca /biology447/modules/module1/tiswildl.html (207 words)

	US EPA - AED - Risks of Multiple Stressors to Common Loons and Other Piscivorous Bird Populations
		Risks of Multiple Stressors to Common Loons and Other Piscivorous Bird Populations
		This web application was developed as part of an EPA project to determine the risks of multiple stressors to common loons and other piscivorous birds.
		This has been done in conjunction with researchers in the northeastern United States and Canada concerned with the threat of mercury and/or threats to the common loon in this geographic area.
	www.epa.gov /aed/html/wildlife/index.html (201 words)

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