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.
- 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..
- Anglers on line to tackle invading snakeheads.
Gordon, George; Wu, Norbert // 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.
- 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.
- 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, Pit�goras 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 Paran� River floodplain to evaluate its short-term impact on the structure of fish assemblages. The effects of trahira density (treatment groups: addition, removal, and...
- 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.
- 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. ...
Welsbacher, Anne // 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...
- 'Dino-dolphins' got the bends.
Welsbacher, Anne // 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.
- 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.
- 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...
- 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...
- 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...
- BELOW THE SURFACE, THE GREAT LAKES ARE SUFFERING FROM
Wach, Elise; Chambers, Randolph M. // 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...
- 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...
- 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, Mari� B.; de Astarloa, Juan M. �az // 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...
- 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...
- First report on the importance of alien gobiids in the diet of native piscivorous fishes in the lower Vistula River (Poland).
Plachocki, Dariusz; Kobak, Jaroslaw; 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...
- Evolutionary tradeoff and equilibrium in an aquatic predator�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...
- 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 Biolog�a 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.
- 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...
- 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...
- 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...
Sperone1, Emilio; Parise, Giovanni; Leone, Agostino; Milazzo, Concerta; Circosta, Vincenzo; Santoro, Gloriano; Paolillo, Giuseppe; Micarelli, Primo; Tripepi, Sandro // 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...
- Impact of Bythotrephes invasion on zooplankton communities in acid-damaged and recovered lakes on the Boreal Shield.
Strecker, Angela L.; Arnott, Shelley E. // Canadian Journal of Fisheries & Aquatic Sciences; Nov2005, Vol. 62 Issue 11, p2450
Invasive species introductions into freshwater ecosystems have had a multitude of effects on aquatic communities. Few studies, however, have directly compared the impact of an invader on communities with contrasting structure. Historically high levels and subsequent reductions of acid deposition...
- Muscle enzymes reveal walleye (Sander vitreus) are less active when larger prey (cisco, Coregonus artedi) are present.
Kaufman, Scott D.; Gunn, John M.; Morgan, George E.; Couture, Patrice // Canadian Journal of Fisheries & Aquatic Sciences; May2006, Vol. 63 Issue 5, p970
Optimal foraging behaviour in walleye (Sander vitreus) was tested in eight lakes: four containing large prey (cisco, Coregonus artedi) and four without cisco. All eight lakes contained small prey (yellow perch, Perca flavescens). Activity costs and growth potential of walleye were estimated...
- 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...
- 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...
- Spatio-temporal variability in the distribution of epi- and meso-pelagic acoustic backscatter in the Irminger Sea, North Atlantic, with implications for predation onCalanus finmarchicus.
Anderson, C.I.H.; Brierley, A. S.; Armstrong, F. // Marine Biology; Apr2005, Vol. 146 Issue 6, p1177
The deep scattering layers of the North Atlantic, including the Irminger Sea, contain many predators of the key copepod speciesCalanus finmarchicus. Previous seasonally restricted studies have described the deep acoustic scattering layers of the Irminger Sea as �ubiquitous�. They have shown...
- Going deep: common murres dive into frigid water for aggregated, persistent and slow-moving capelin.
Hedd, April; Regular, P.; Montevecchi, W.; Buren, A.; Burke, C.; Fifield, D. // Marine Biology; Feb2009, Vol. 156 Issue 4, p741
Owing to the necessity of delivering food to offspring at colonies, breeding seabirds are highly constrained in their foraging options. To minimize constraints imposed by central-place foraging and to optimize foraging behavior, many species exhibit flexible foraging tactics. Here we document...
- Comparative vulnerability to predators, and induced defense responses, of eastern oysters Crassostrea virginica and non-native Crassostrea ariakensis oysters in Chesapeake Bay.
Newell, Roger I. E.; Kennedy, Victor S.; Shaw, Kristi S. // Marine Biology; Aug2007, Vol. 152 Issue 2, p449
Management agencies are considering introducing the Suminoe oyster Crassostrea ariakensis into Chesapeake Bay, USA. It is unknown if the growth of feral populations of this non-native oyster would be regulated by the same predators that once controlled the abundance of the native eastern oyster...
- Parental care in Salamandrina perspicillata (Amphibia, Salamandridae): egg defence against caddisfly larvae.
Boscherini, Andrea; Romano, Antonio // North-Western Journal of Zoology; 2011, Vol. 7 Issue 1, p167
Vertebrates exhibit different degrees and modes of parental care. Among Amphibia, most families are known to perform some form of parental care, but parental care behaviours in Salamandridae (82 species) are extremely rare (only three species). We report an egg-guarding behaviour in the Italian...
- 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 prey�s 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 species...
- The position of the retinal area centralis changes with age in Champsocephalus gunnari (Channichthyidae), a predatory fish from coastal Antarctic waters.
Miyazaki, T.; Iwami, T.; Meyer-Rochow, V. // Polar Biology; Aug2011, Vol. 34 Issue 8, p1117
Histological examinations of the topographical distribution and the area of highest density (the area centralis: AC) of presumed retinal ganglion cells found in the retina in 0- to 6-year-old Champsocephalus gunnari revealed differences between younger and older fish. Individuals of up to 2...
- The presence of scavengers increases the vulnerability of juvenile abalone to predatory fish.
KIYOMOTO, Setuo // Fisheries Science; Jun2007, Vol. 73 Issue 3, p732
The article explores the effect of scavengers on abalone, Haliotis discus discus, especially in the situation where predatory fishes exist. Tank experiments were carried out using wrasse, one of the major predatory fish for abalone juvenile just after release, and a saprophagous gastropod...
- Snakehead Discovery.
KIYOMOTO, Setuo // New York State Conservationist; Feb2006, Vol. 60 Issue 4, p29
The article reports on the discovery by the New York State Department of Environmental Protection staff of northern snakehead fish in a New York City lake in June 2005. The snakehead is a predatory fish popular both as exotic food and as aquarium fish. Their introduction into U.S. waters has the...
- Geographical differences in the feeding patterns of red rockfish (Sebastes capensis) along South American coasts.
Barrientos, Claudio A.; Gonz�lez, M. Teresa; Moreno, Carlos A. // Fishery Bulletin; Oct2006, Vol. 104 Issue 4, p489
Feeding habits and feeding strategy of red rockfish (Sebastes capensis) were studied from fish captured along most of the range of this species in coastal waters of South America. Stomach contents of 613 individuals, collected during 2003, were analyzed. Fish were obtained from six locations...
- Gape Limitation, Prey Size Refuges and the Top�down Impacts of Piscivorous Largemouth Bass in Shallow Pond Ecosystems.
Nowlin, Weston H.; Drenner, Ray W.; Guckenberger, Kirk R.; Lauden, Mark A.; Alonso, G. Todd; Fennell, Joseph E.; Smith, Judson L. // Hydrobiologia; Jun2006, Vol. 563 Issue 1, p357
Top�down control of phytoplankton biomass through piscivorous fish manipulation has been explored in numerous ecological and biomanipulation experiments. Piscivores are gape-limited predators and it is hypothesized that the distribution of gape sizes relative to distribution of body depths of...
- The Shrimp Caridina nilotica in Lake Victoria (East Africa), Before and After the Nile Perch Increase.
Goudswaard, Kees; Witte, Frans; Wanink, Jan // Hydrobiologia; Jun2006, Vol. 563 Issue 1, p31
The shrimp Caridina nilotica is a major prey of the introduced Nile perch in Lake Victoria. In spite of heavy predation, the density of shrimps increased after the Nile perch boom and the concomitant disappearance of the haplochromine cichlids. In the same period, the mean size of gravid shrimps...
- Horizontal dynamics of zooplankton in subtropical Lake Blanca (Uruguay) hosting multiple zooplankton predators and aquatic plant refuges.
Iglesias, Carlos; Goyenola, Guillermo; Mazzeo, Nestor; Meerhoff, Mariana; Rod�, Elena; Jeppesen, Erik // Hydrobiologia; May2007, Vol. 584 Issue 1, p179
In the subtropics, the effects of macrophytes on trophic interactions are more complex than in temperate lakes. Fish, particularly the smallest species and individuals, aggregate in high numbers in the vegetation, and a strong predation pressure on zooplankton by shrimps and invertebrates, such...
- Changes in amphipod densities among macroalgal habitats in day versus night collections along the Western Antarctic Peninsula.
Aumack, Craig F.; Amsler, Charles D.; McClintock, James B.; Baker, Bill J. // Marine Biology; Aug2011, Vol. 158 Issue 8, p1879
mphipods along the western Antarctic Peninsula appear to gain refuge from predators by associating with chemically defended macroalgae rather than palatable macroalgae. However, nothing is known about amphipod activity at night. If foraging on non-chemically defended macroalgae regularly occurs,...
- How long can we keep fishing to feed fish?
Gosline, Anna // New Scientist; 10/2/2004, Vol. 184 Issue 2467, p16
The article cites a study related to over-harvesting of small fish to feed farmed salmon. This is threatening marine ecosystems worldwide, according to a report commissioned by respected environmental organizations. Feed for farmed fish consists of up to 80 per cent fishmeal and oil, because...
- Biomechanics: Deadly strike mechanism of a mantis shrimp.
Patek, S. N.; Korff, W. L.; Caldwell, R. L. // Nature; 4/22/2004, Vol. 428 Issue 6985, p819
Stomatopods (mantis shrimp) are well known for the feeding appendages they use to smash shells and impale fish. Here we show that the peacock mantis shrimp (Odontodactylus scyllarus) generates an extremely fast strike that requires major energy storage and release, which we explain in terms of a...