Citations with the tag: PREDATORY aquatic animals
Results 1 - 50
- THE FROGFISH.
Deloach, Ned; Deloach, Anna // Sport Diver; Feb2012, Vol. 20 Issue 1, p26
The article offers information on frogfish, a predatory fish that can move by gulping in water ejected through its gills.
- Vicious Fishes.
Alwang-Perrone, Kim // Boating; Oct2002, Vol. 75 Issue 10, p34
Reports on the existence of the predatory Asian snakehead fish in the U.S. Reason why it is considered to be a danger to endangered aquatic species; Penalties that will be imposed on those who would bring the fish to the country.
- Really weird, really wild!
Gordon, George; Wu, Norbert // National Geographic World; Apr99, Issue 284, p3
Provides information on why silvery jackfishes are swimming in circles. Use of the formation to avoid predators; Description of the jackfishes in the Sipadan, Pacific Ocean. INSET: Do it yourself..
- BOX JELLIES.
Seymour, Jamie; Sutherland, Paul A. // Nature Australia; Autumn2001, Vol. 26 Issue 12, p32
Provides information on the biology of box jellyfishes or Chironex fleckeri. Morphology of box jellyfishes; Role of the venom of box jellyfishes in their efforts to catch prey; Technique used to track box jellyfishes during rough weather. INSET: Box Jellyfishes.
- Anglers on line to tackle invading snakeheads.
Seymour, Jamie; Sutherland, Paul A. // Nature; 7/18/2002, Vol. 418 Issue 6895, p267
Reports on the discovery of the varacious predator snakehead from China in a pond in Maryland in June 2002. Speculation on the source of the snakehead; Threat posed by the predator for native freshwater species.
- A WOLF IN SHEEP'S CLOTHING.
GILLIGAN, JUSTIN // Diver Magazine; 2013, Vol. 38 Issue 3, p10
The article provides information on the behavior of harlequin shrimp, scientific name Hymenocera elegans, which looks beautiful but is a voracious predator of animals, and presents a photograph of it captured by the author at a menagerie located in Lembeh Strait, Indonesia.
- Chapter 3: The Kill.
Welsbacher, Anne // Killer Whales; 2002, p18
The chapter offers a look at how killer whales kill their prey. Killer whales eat a wide variety of prey. They use their teeth for tearing the prey apart. Killer whale pods can attack animals much larger than they are. They bite large chunks of flesh from the animal in order to weaken it. ...
- What best explains vigilance in elk: characteristics of prey, predators, or the environment?
Stewart Liley; Scott Creel // Behavioral Ecology;
We quantified the vigilance levels of elk (Cervus elaphus) preyed on by wolves (Canis lupus) in Yellowstone National Park, between January and May in 2005 and 2006, and used Akaikes information criterion to compare a set of 38 regression models for vigilance levels. These models combined up to 9...
- The role of the predatory trahira (Pisces: Erythrinidae) in structuring fish assemblages in lakes of a Neotropical floodplain.
Petry, Ana Cristina; Gomes, Luiz Carlos; Piana, Pitágoras Augusto; Agostinho, Angelo Antonio // Hydrobiologia; Aug2010, Vol. 651 Issue 1, p115
We performed an experimental manipulation of trahira Hoplias aff. malabaricus in a series of isolated lakes of the upper ParanÃ¡ River floodplain to evaluate its short-term impact on the structure of fish assemblages. The effects of trahira density (treatment groups: addition, removal, and...
Petry, Ana Cristina; Gomes, Luiz Carlos; Piana, Pitágoras Augusto; Agostinho, Angelo Antonio // Earthwatch: The Journal of Earthwatch Institute; Feb98, Vol. 17 Issue 1, p38
Describes the Earthwatch project lead by Kenneth Balcomb and Dr. Astrid van Ginneken on an investigation on the lifeways of an orca marine predator which will take place in Haro Strait, Puget Sound in Washington. Data to be gathered; Balcomb's examination on the orca society and the...
- Different behaviour of North and Irish Sea cod.
Righton, David; Metcalfe, Julian; Connolly, Paul // Nature; 5/10/2001, Vol. 411 Issue 6834, p156
Provides information on a study which investigated the behavior of predatory fish cod in the North and Irish Sea. Differences in cod behavior; Behavioral patterns of the predatory fish; Foraging movements of the cod during summer; Monthly variation in the activity of the cod.
- 'Dino-dolphins' got the bends.
Righton, David; Metcalfe, Julian; Connolly, Paul // New Scientist; 5/26/2012, Issue 2866, p17
The article looks at a report in "Naturwissenschaften" by researcher Bruce Rothschild and team that found evidence of decompression sickness in ichthyosaur fossils in the late Jurassic and Cretaceous periods, but not in those from the Triassic, suggesting the introduction of large marine predators.
- Dirty-water Walleye.
Schnieders, Bernie // Ontario Out of Doors; Jul2005, Vol. 37 Issue 6, p22
This article presents information on walleyes. Water clarity is an important consideration for walleye anglers. The author compares low-clarity water with low light conditions, in which walleye commonly feed. Their great eyesight in dim light gives them an advantage over their forage. Inactive...
- Why the Long Neck?
Watson, Galadriel // Ask; Mar2005, Vol. 4 Issue 3, p3
Provides information on the long neck of marine reptile, Dinocephalosaurus orientalis. Definition of the reptile's name; Size of its neck; Use of its neck in hunting for prey.
- IT'S OFFICIAL: BONEFISH SPAWN OFFSHORE.
Watson, Galadriel // Sport Fishing; Sep2011, Vol. 26 Issue 8, p10
This section offers sportsfishing news briefs in the U.S. University of Massachusetts Amherst researcher Andy Danylchuk concluded that bonefish spawn offshore. The Census of Marine Life Tagging of Pacific Predators (TOPP) has released data from the largest research initiative ever conducted on...
- Fish Predation by the Water Snake Afronatrix anoscopus in a Guinean Rainforest Stream.
Trape, S�bastien; Guilhaumon, Fran�ois; Batd�, CeIIou // Journal of Freshwater Ecology; Sep2008, Vol. 23 Issue 3, p495
We collected fifty specimens of the colubrid water snake Afronatrix anoscopus during a single day in a 100 m section of a rainforest stream of southeastern Guinea. Food items were present in the digestive tracts of 17 specimens, with a significantly higher occurrence in females (48%) than in...
- Modelling Production and Biomasses of Prey and Predatory Fish in Lakes.
H�kanson, Lars; Boulion, Viktor V. // Hydrobiologia; Jan2004, Vol. 511 Issue 1-3, p125
This work presents a new dynamic model to predict two fundamental functional categories of fish in lakes, prey and predatory fish. The model has been developed within the framework of a more comprehensive lake ecosystem model, LakeWeb, which also accounts for phytoplankton, bacterioplankton, two...
- NO. 2 ORCA (KILLER WHALE).
Graham, Anna // Fierce Predators; 2006, p22
The article offers information on the orca or killer whale. The orca or killer whale is the second animal featured in the book "Fierce Predators." It is a toothed whale that is closely related to dolphins and porpoises. It is usually found in seas and oceans. It also prefers cool water. Orcas...
- Variabilidad temporal de la abundancia de Coralliophila abbreviata y Coralliophila caribaea (Mollusca, Coralliophilidae) en un arrecife coralino del Parque Nacional Morrocoy, Venezuela.
del M�naco, Carlos; Villamizar, Estrella; Narciso, Samuel // Revista de Biologï¿½a Tropical; jun2008, Vol. 56 Issue 2, p501
The mollusks Coralliophila abbreviata and C. caribaea are coral predators in the Caribbean Sea . We evaluated the temporal variability of abundance and size structure of C. abbreviata and C. caribaea in Cayo Sombrero, Morrocoy National Park, Venezuelar (September 2004 - August 2005). The density...
PARKER, STEVE // Pesces; 1997, p50
No abstract available.
- Shark Bite.
PARKER, STEVE // MotorBoating; Jul2005, Vol. 196 Issue 1, p22
The article reports that the great white shark rescued from the nets of a fishing boat and placed at the Monterey Bay Aquarium in California has begun eating the other sharks in captivity. The remaining soup-fin sharks that were sharing the tank have been moved after the incident.
- RELEASE THE KRAKEN!
Murch, Andy // Diver Magazine; Jun2012, Vol. 37 Issue 5, p26
The article focuses on Humboldt squid or Disidicus gigas. It says that Humboldt live far below the surface of the sea in which it deeper reaches the Gulf of California, Mexico. It states that Humboldts are voracious predators that drop an unbaited squid jig in the right place that snag an...
- Spatiotemporal patterns of distribution of large predatory sharks in Calabria (central Mediterranean, southern Italy).
Sperone1, Emilio; Parise, Giovanni; Leone, Agostino; Milazzo, Concerta; Circosta, Vincenzo; Santoro, Gloriano; Paolillo, Giuseppe; Micarelli, Primo; Tripepi, Sandro // Acta Adriatica; Jun2012, Vol. 53 Issue 1, p13
During the 2000-2009, a survey study on the spatiotemporal patterns of distribution of large predatory sharks was carried out in the Calabria region. A total of 12 species were recorded and among them the blue shark Prionace glauca and the bluntnose sixgill shark Hexanchus griseus were the most...
- Invasion of the jellyfish.
Sperone1, Emilio; Parise, Giovanni; Leone, Agostino; Milazzo, Concerta; Circosta, Vincenzo; Santoro, Gloriano; Paolillo, Giuseppe; Micarelli, Primo; Tripepi, Sandro // Geographical (Geographical Magazine Ltd.); Oct2006, Vol. 78 Issue 10, p10
This article reports on the rise in jellyfish numbers around the shores of the Mediterranean Sea. A recent survey by environmental group Oceana found more than ten jellyfish per square meter in some areas off the Spanish coast. The increased salinity of inshore waters due to reduced river flows,...
- Evolutionary tradeoff and equilibrium in an aquatic predatorâ€“prey system.
Jones, Laura E.; Ellner, Stephen P. // Bulletin of Mathematical Biology; Nov2004, Vol. 66 Issue 6, p1547
Due to the conventional distinction between ecological (rapid) and evolutionary (slow) timescales, ecological and population models have typically ignored the effects of evolution. Yet the potential for rapid evolutionary change has been recently established and may be critical to understanding...
- Top-down Effect of Fish Predation in Virginia Headwater Streams.
Wach, Elise; Chambers, Randolph M. // Northeastern Naturalist; 2007, Vol. 14 Issue 3, p461
We completed laboratory-feeding studies that demonstrated preference of the headwater stream fishes Gambusia holbrooki (Mosquitofish) and Clinostomus funduloides (Rosyside Dace) for smaller Gammarus pseudolimnaeus (amphipods) over larger ones. We also submerged oak leaf-litter bags in sections...
Wach, Elise; Chambers, Randolph M. // Time; 3/10/1924, Vol. 3 Issue 10, p22
The article offers information on several fish species that have other abilities, including the ability to stay out of water for a period of time. They include the climbing fish Anabas Scandens, a species of acanthopterygia fishes of the family Anabantidae that can climb trees to a height of six...
- CONTEXT DEPENDENCE OF NONLETHAL EFFECTS OF A PREDATOR ON PREY GROWTH.
Peacor, Scott D.; Werner, Earl E. // Israel Journal of Zoology; 2004, Vol. 50 Issue 2/3, p139
Predators can have a large influence on their prey through induced changes in prey phenotype. Such "nonlethal" predator effects have been abundantly demonstrated empirically in both terrestrial and aquatic systems. But the extent to which changes in species traits alter short-term responses such...
- Using bone measurements to estimate the original sizes of bluefish (Pomatomus saltatrix) from digested remains.
Wood, Anthony D. // Fishery Bulletin; Apr2005, Vol. 103 Issue 2, p461
Presents a study that used bone measurements to estimate the original sizes of bluefish, or Pomatomus saltatrix, from digested remains. Importance of the ability to estimate the original size of an ingested prey item; Materials and methods used; Analysis of the consumption rates of key...
- BELOW THE SURFACE, THE GREAT LAKES ARE SUFFERING FROM
Wood, Anthony D. // National Wildlife (World Edition); Dec2004/Jan2005, Vol. 43 Issue 1, p64
Provides information on the study "Ecosystem Shock: The Devastating Impacts of Invasive Species on the Great Lakes Food Web," by the National Wildlife Federation (NWF), released in October 2004. Information on several predatory species; Views of Andy Buchsbaum, director of Great Lakes Natural...
- Feeding habits of the Magellan skate: effects of sex, maturity stage, and body size on diet.
Barbini, Santiago A.; Scenna, Lorena B.; Figueroa, Daniel E.; Cousseau, Mariá B.; de Astarloa, Juan M. íaz // Hydrobiologia; Mar2010, Vol. 641 Issue 1, p275
The aim of this study was to evaluate the effects of sex, maturity stage, and body size on the diet of the Magellan skate, Bathyraja magellanica, in the Southwest Atlantic off Argentina, by examining stomach contents using a multiple hypothesis modeling approach. Relationships between the number...
- First report on the importance of alien gobiids in the diet of native piscivorous fishes in the lower Vistula River (Poland).
Płąchocki, Dariusz; Kobak, Jarosław; Kakareko, Tomasz // Oceanological & Hydrobiological Studies; 2012, Vol. 41 Issue 2, p83
We conducted a snapshot study to check the importance of non-native Ponto-Caspian gobies (monkey and racer goby) in the diet of native obligate (northern pike, pikeperch) and facultative (Eurasian perch) predators in the Vistula River 3-4 years after the appearance of aliens. In total 71 fish...
- The influence of aquatic predators on mosquito abundance in animal drinking troughs in New Zealand.
Zuharah, Wan Fatma; Lester, Philip J. // Journal of Vector Ecology; Dec2010, Vol. 35 Issue 2, p347
The occurrence and abundance of mosquito populations may be associated with the abundance of predators. We examined the relationship between aquatic predators and populations of mosquitoes in animal water troughs in Waikanae, New Zealand. We also investigated the effects of water volume and...
- Fish predation on sea urchins on the Great Barrier Reef.
Young, M.; Bellwood, D. // Coral Reefs; Sep2012, Vol. 31 Issue 3, p731
Predators are important for regulating adult sea urchin densities. Here, we employ remote underwater video cameras to record diurnal predation on tethered sea urchins at Lizard Island on the Great Barrier Reef (GBR). We identified four fish predators of adult sea urchins ( Balistoides...
- ALTERING LIFE HISTORY TRAITS: A SIZE-SELECTIVE PREDATOR DECREASES THE SIZE OF ITS PREY.
Bennice, Chelsea O.; Conroy, Joseph D.; Culver, David A. // Ohio Journal of Science; Mar2008, Vol. 108 Issue 1, pA-10
Predators negatively influence prey primarily through decreasing their total abundance. However, size-selective predators may also decrease fecundity through selective removal of large, more fecund individuals. Removal of large individuals may decrease trophic efficiency by decreasing the energy...
- COMPARATIVE ECOLOGY OF EURYHALINE AND FRESHWATER PREDATORS IN A SUBTROPICAL FLOODPLAIN RIVER.
BLEWETT, DAVID A.; STEVENS, PHILIP W.; CALL, MARVIN E. // Florida Scientist; Spring2013, Vol. 76 Issue 2, p166
Euryhaline predatory fishes use river systems in south Florida, but the degree to which they compete with resident freshwater fish predators is unknown. The objectives of this study were to determine the abundance, distribution, habitat, and diet of a large diadromous euryhaline predator (common...
- Multiple selection pressures influence Trinidadian guppy (Poecilia reticulata) antipredator behavior.
Christopher N. Templeton; Walter M. Shriner // Behavioral Ecology; Jul2004, Vol. 15 Issue 4, p673
Animals alter their behavior to avoid a variety of different types of predators. Trinidadian guppies (Poecilia reticulata) have been an important system for examining the evolution of antipredator behavior because geographically isolated populations experience different amounts of aquatic...
- A RECORD OF INVASIVE BLACK CATFISH (Trachelyopterus lucenai) PREDATION BY THE NEOTROPICAL RIVER OTTER (Lontra longicaudis) IN RESTINGA OF RIO GRANDE, SOUTHERN BRAZIL.
Porciuncula, Rafael Almeida; Quintela, Fernando Marques // IUCN Otter Specialist Group Bulletin; Jan2010, Vol. 27 Issue 1, p50
Trachelyopterus lucenai (Siluriformes: Auchenipteridae) is an invasive fish in restinga of Rio Grande, Rio Grande do Sul State, southern Brazil. In April 2007 remains of T. lucenai were found in the stomach of an individual of Lontra longicaudis which was run over near a pluvial channel in the...
- Optimisation and mathematical explanation: doing the LÃ©vy Walk.
Baron, Sam // Synthese; Feb2014, Vol. 191 Issue 3, p459
The indispensability argument seeks to establish the existence of mathematical objects. The success of the indispensability argument turns on finding cases of genuine extra-mathematical explanation (the explanation of physical facts by mathematical facts). In this paper, I identify a new case of...
- A New Saurichthyiform (Actinopterygii) with a Crushing Feeding Mechanism from the Middle Triassic of Guizhou (China).
Wu, Feixiang; Chang, Mee-mann; Sun, Yuanlin; Xu, Guanghui // PLoS ONE; Dec2013, Vol. 8 Issue 12, p1
Background: Equipped with an effective predatory feeding mechanism enhanced by large and sharp teeth, pointed snout and elongate body, saurichthyiform fishes are considered common fish-eaters in the early Mesozoic aquatic ecosystems. Additionally, because of the similar body plan across species,...
- Invasion biology of Ponto-Caspian onychopod cladocerans (Crustacea: Cladocera: Onychopoda).
Panov, Vadim; Rodionova, Natalie; Bolshagin, Pavel; Bychek, Eugene // Hydrobiologia; Aug2007, Vol. 590 Issue 1, p3
We review the patterns of recent range expansions and the biology of the invasive Ponto-Caspian predatory onychopod cladocerans: Cercopagis pengoi, Evadne anonyx, Podonevadne trigona, Cornigerius maeoticus and Cornigerius bicornis. Recent invasions of C. pengoi, E. anonyx and C. maeoticus into...
- Multiple predator effects result in risk reduction for prey across multiple prey densities.
Vance-Chalcraft, Heather D.; Soluk, Daniel A. // Oecologia; Jul2005, Vol. 144 Issue 3, p472
Investigating how prey density influences a preyï¿½s combined predation risk from multiple predator species is critical for understanding the widespread importance of multiple predator effects. We conducted experiments that crossed six treatments consisting of zero, one, or two predator...
- The invasive predator Bythotrephes induces changes in the vertical distribution of native copepods in Lake Michigan.
Bourdeau, Paul; Pangle, Kevin; Peacor, Scott // Biological Invasions; Nov2011, Vol. 13 Issue 11, p2533
Invasive predators can have large negative effects on native prey populations. The susceptibility of native prey to invasive predators may depend on their ability to respond behaviorally to the presence of these non-native predators. In a field survey conducted in Lake Michigan over several...
- Northern pike ( Esox lucius) in a warming lake: changes in population size and individual condition in relation to prey abundance.
Winfield, Ian; James, J.; Fletcher, Janice // Hydrobiologia; Mar2008, Vol. 601 Issue 1, p29
Climate change is anticipated to have differential effects on the salmonid and percid-cyprinid components of lake fish communities, which may in turn impact the foraging conditions and so population biology of top aquatic predators including northern pike ( Esox lucius Linnaeus). Since the...
- Tuolumne River: 93 percent of juvenile salmon consumed by predators.
Winfield, Ian; James, J.; Fletcher, Janice // Western Farm Press Exclusive Insight; 2/28/2013, p10
The article discusses the finding that 93% of juvenile salmon in the Tuolumne River in California is eaten by predators. The reports was prepared by the Federal Energy Regulatory Commission as part of relicensing process of Don Pedro Dam. The finding underscores the errors in a proposal by the...
- Predatory Impacts of Two Introduced Crab Species: Inferences from Microcosms.
Tyrrell, Megan C.; Guarino, Patricia A.; Harris, Larry G. // Northeastern Naturalist; 2006, Vol. 13 Issue 3, p375
We utilized microcosms that mimicked the rocky intertidal community to examine the predatory impacts of two introduced crab species. Carcinus maenas and Hemigrapsus sanguineus, on naturally occurring assemblages of organisms on rocks in the laboratory and in the field. The two crab species had...
- Can native species crucian carp Carassius auratus recognizes the introduced red swamp crayfish Procambarus clarkii?
Fengjin Cai; Zhengjun Wui; Nan He; Zhenxing Wang; Chengming Huang // Current Zoology; 2011, Vol. 57 Issue 3, p330
Procambarus clarkii is native to the south-central United States (Louisiana) and northeastern Mexico, and is a highly efficient predator that poses a damager to native species after its introduction or invasion. In its natural habitat, P. clarkii consumes Carassius auratus, however, whether C....
- Dietary Selection Among Different Size Classes of Larval Ambystoma jeffersonianum (Jefferson Salamanders).
Bardwell, Jeff H.; Ritzi, Christopher M.; Parkhurst, James A. // Northeastern Naturalist; 2007, Vol. 14 Issue 2, p293
This study examines changes in the frequency/abundance of prey selection among five size classes of 183 Ambystoma jeffersonianum (Jefferson Salamanders) within a natural, unmanipulated environment. Significant differences were found in prey selection among size classes in vertebrate and...
- Potential risks of natural mercury levels to wild predator fish in an Amazon reservoir.
Silva, Grazyelle; Filipak Neto, Francisco; Silva de Assis, Helena; Bastos, Wanderley; Oliveira Ribeiro, Ciro // Environmental Monitoring & Assessment; Aug2012, Vol. 184 Issue 8, p4815
Mercury (Hg) is a toxic metal that bioaccumulates in aquatic organisms and along food chain. Many studies have reported the problem of mercury exposure in aquatic systems from Amazon basin, but very few have focused on the potential risks to wild fish. The present study reports the...
- FIRST RECORD OF THE MICRO-PREDATOR Huttonella bicolor (Hutton, 1834) (GASTROPODA, STREPTAXIDAE) ON RIO DE JANEIRO CITY, BRAZIL.
dos Santos, Sonia Barbosa; Viana, Tiago Abreu; Fonseca, Francielle Cardoso // BiociÃªncias; Jun2008, Vol. 16 Issue 2, p145
The article focuses on a study on the first record of the micro-predator Huttonella bicolor in Rio de Janiero, Brazil. Researchers at the MaracanÃ£ Campus of the University of the State of Rio de Janeiro (UERJ) found 11 adult shells and four adult living specimens during the course of the...