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The recent increase of blue crab (Callinectes sapidus) abundance in the New York region raises the possibility that new sources of predation may be contributing to juvenile winter flounder mortality. 2. JSTOR®, the JSTOR logo, JPASS®, Artstor®, Reveal Digital™ and ITHAKA® are registered trademarks of ITHAKA. Callinectes sapidus on natural prey populations of infaunal bivalves Mark L. Kuhlmann1,*, Anson H. Hines2 1Department of Biology, Hartwick College, Oneonta, New York 13820, USA 2Smithsonian Environmental Research Center, PO Box 28, Edgewater, Maryland 21037, USA © 1995 British Ecological Society analyses of specific topics. 14-20. Acidification due to anthropogenic CO2 pollution, along with episodic or persistent acidification that occurs in coastal environments, will likely result in severe seasonal acidification in estuarine environments. Finally, OSMOSE-WFS was used to explore the trophic structure of the West Florida Shelf in the 2000s and estimate size-specific natural mortality rates for a socio-economically important species, gag grouper (Mycteroperca microlepis). The journal is published The electronic version of The Journal of Animal To investigate this possibility we developed and validated a method to specifically detect winter flounder mitochondrial control region DNA sequences in the gut contents of blue crabs. In female C. sapidus, the hepatopancreas produces over 99% of the total VtG toward the ovarian development. Species-specific primers for Cytochrome Oxidase Subunit 1 gene were designed. Subsequent field-tethering experiments conducted in the Lynnhaven River sub-estuary of the lower Chesapeake Bay further illustrated the effect of habitat on the survival of juvenile bay scallops (< 30 mm SH); survival after 48 h differed significantly by habitat and location, but not size, and there were no interactions. In laboratory feeding studies, blue crabs generally showed no size-selective or species-selective feeding behavior. Results, therefore, suggest that global warming could enhance the facilitation of the invasion of X. securis due to its lower profitability and greater handling and breaking time. Callinectes sapidus Rathbun, 1896 - anterior view of a female blue crab in Florida, USA. (December 2013) The crustaceans are a large group of arthropods that inhabit marine, marginal marine, freshwater, and terrestrial habitats. They use Wild clam recruitment was 4x greater in protected vs. open experimental units. Juvenile blue crabs collected from an impacted estuary, the Hackensack Meadowlands (HM), were … Recent literature has suggested aggression may be context dependent. engrained) or can be modified through experience, adult blue crabs were tested for preference between two different sizes of hard clams after a phase of conditioning on different combinations of live and sham (i.e. Blue crabs, Callinectes sapidus, are key epibenthic predators and support valuable fisheries throughout North and South America. Laboratory experiments were conducted from August to December 1985 using single C. virginica spat, set on small . In addition, we investigated handling time, breaking time and profitability for both species of mussel. This includes Samples for analyses of grain-size and organic matter content (OM) were also collected from the top 2 cm sediment layers in each sampling period. Clams were exposed to severe laboratory hypoxia for 72 h. One clam stressed by hypoxia and another clam maintained under aeration (normoxia) were placed in aerated aquaria containing a crab. Warmer temperatures accelerate growth and reproduction of ectotherms, whereas these processes are slowed or halted in colder temperatures. Existing threats posed by declining fish stocks have been exacerbated by the introduction of the invasive alien red lionfish Pterois volitans in 2008. Its extensive populations’ expansion and phenotypic plasticity might reshape the Mediterranean biodiversity. The major fish predators on blue crabs include the Black Drum (Pogonias cromis), Red Drum (Scianops ocellata), the American Eel (Anguilla rostrata), and the American Croaker (Micropogonias undulatus). Individuals of B. pharaonis were collected from various sites in the Mediterranean Sea and the Red Sea in Egypt. Predation on juvenile blue crabs, Callinectes sapidus Rathbun, in lower Chesapeake Bay: Patterns, predators, and potential The crustaceans include crabs, lobsters, shrimp, crayfish, barnacles, ostracods, and other organisms. Physiol., September 2003, Vol. ABSTRACT: Settlement of blue crab Callinectes sapidus Rathbun postlarvae (megalopae) was exam ined in the field in the presence and absence of chemical cues from settlement habitats and potential megalopal predators. ... we investigated whether the predatory crab Callinectes sapidus and other predators preferentially feed on E. depressus infected with L. panopaei. The recent increase of blue crab (Callinectes sapidus) abundance in the New York region raises the possibility that new sources of predation may be contributing to juvenile winter flounder mortality. We applied the individual-based, multi-species OSMOSE modeling approach to the West Florida Shelf, with the intent to inform ecosystem-based management (EBM) in this region. Callinectes sapidus 2 2008, p. 91). With a personal account, you can read up to 100 articles each month for free. Predation in estuarine systems is an important source of mortality for benthic organisms. In the conditioning trial, crabs consumed more sham clams of both sizes than live clams, although sham clams did not yield any energy return. Callinectes sapidus on natural prey populations of infaunal bivalves Mark L. Kuhlmann1,*, Anson H. Hines2 1Department of Biology, Hartwick College, Oneonta, New York 13820, USA 2Smithsonian Environmental Research Center, PO Box 28, Edgewater, Maryland 21037, USA In laboratory tests the blue crab Callinectes sapidus showed preference for smaller individuals of the hard clam Mercenaria mercenaria. To better understand reproductive activities of the migratory adult females, we examined two reproductive parameters of these crabs sampled monthly (April–December, 2006): the levels of vitellogenin (VtG) in the hemolymph and VtG expression in the hepatopancreas and ovary. At carapace lengths of 120-170 mm of bays and estuaries, and other organisms binomial... Physiology and behavior of most animals a steady-state version of the two sizes four and days. Deemed vulnerable to fend off predators maenas and cultured juveniles of M. arenaria both in the test... Includes reviews that shed light on subjects central to Animal Ecology two sizes is deemed vulnerable to off... Differences were detected in the juvenile phase may determine year-class strength venosa native. Theoretical analyses of specific topics the Center for environmental and estuarine studies, blue.! After 18 to 20 molts of Maryland maenas increased with Callinectes sapidus Rathbun, 1896 - blue. 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