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Effects Of Temperature And Competition On Foraging In Indigenous Rock Cancer Irroratus And Recently Introduced Green Carcinus Maenas Crabs From Newfoundland And Labrador Canada
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Book Synopsis Effects of Temperature and Competition on Foraging in Indigenous Rock (Cancer Irroratus) and Recently Introduced Green (Carcinus Maenas) Crabs from Newfoundland and Labrador, Canada by : Kyle Alexander Matheson
Download or read book Effects of Temperature and Competition on Foraging in Indigenous Rock (Cancer Irroratus) and Recently Introduced Green (Carcinus Maenas) Crabs from Newfoundland and Labrador, Canada written by Kyle Alexander Matheson and published by . This book was released on 2012 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecophysiology of the European Green Crab (Carcinus maenas) and Related Species by : Dirk Weihrauch
Download or read book Ecophysiology of the European Green Crab (Carcinus maenas) and Related Species written by Dirk Weihrauch and published by Elsevier. This book was released on 2023-09-01 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecophysiology of the Green Shore Crab (Carcinus maenas) and Related Species: Mechanisms Behind the Success of a Global Invader provides an in-depth perspective of this devastatingly invasive coastal species. During the last 175 years, Carcinus maenas has spread around the globe by human activities. Because of its ability to flourish in a wide variety of ecosystems and outcompete native species it has been listed as one of the top 100 worst global invaders. Written by international experts, this book focuses on Carcinus maenas and discusses other brachyurans with similar physiologies as comparisons, including control systems and mechanisms used. This book serves as a valuable resource for researchers in marine biology and invasive biology, as well as for university lecturers, government or environmental agencies. Gathers all information on ecological physiology of this important species into one place Discusses how this one species of crab has managed to be spread around the globe and survive in many different environments Features a chapter by First Nations members on how this species may impact indigenous fisheries and culture
Book Synopsis Impacts of Newly Established Non-indigenous Green Crab (Carcinus Maenas) on Native Fauna in Placentia Bay, Newfoundland by : Melanie Anne Rossong
Download or read book Impacts of Newly Established Non-indigenous Green Crab (Carcinus Maenas) on Native Fauna in Placentia Bay, Newfoundland written by Melanie Anne Rossong and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent invasion of the European green crab (Carcinus maenas) populations in Placentia Bay, Newfoundland and Labrador (NL) raises great concern about potential impacts on local fisheries and native biodiversity. Green crab are highly adaptable and in both native and invaded areas, green crab are well established predators that can outcompete other similarly sized decapods. The main objectives of this thesis were to: 1) identify the native species that green crab compete with for resources; 2) determine the depths and substrate types in which these interactions likely occur; 3) assess the indirect effects of green crab on native crustaceans and their changes in behavior; 4) assess the impacts of green crab on benthic community structure; 5) compare the NL population with other Atlantic Canadian populations in terms of competitive abilities; and 6) compare morphological features of the NL population with other Atlantic Canadian populations. I found that green crab overlap in space and diet with both rock crab (Cancer irroratus) and American lobster (Homarus americanus), potentially leading to a shift in habitat. Laboratory studies on naïve juvenile lobster also suggested shifts in behavior related to green crab, in that lobster decreased foraging activity and increased shelter use in the presence of green crab. Benthic community analyses showed fewer species in mud, sand, and eelgrass sites heavily populated by green crab compared to sites without green crab, although results depended on the taxa involved and I could not eliminate environmental differences through a short term caging study. Foraging ability of green crab varied in intraspecific competition experiments, with populations from NL and Prince Edward Island dominating longer-established populations from Nova Scotia and New Brunswick. Additional studies excluded claw size as a factor driving these results and behavioral differences likely reflected differences in invasion time and population genetics. Overall, green crab in Placentia Bay appear to be altering community structure of benthic invertebrates through predation and they also appear to indirectly impact native crustaceans through competition.
Book Synopsis Synopsis of Biological Data on the Rock Crab, Cancer Irroratus Say by : Thomas E. Bigford
Download or read book Synopsis of Biological Data on the Rock Crab, Cancer Irroratus Say written by Thomas E. Bigford and published by . This book was released on 1979 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Interspecific Competition and Prey Odor on Foraging Behavior in the Rock Crab, Cancer Irroratus, Say by : James Salierno (D.)
Download or read book The Effects of Interspecific Competition and Prey Odor on Foraging Behavior in the Rock Crab, Cancer Irroratus, Say written by James Salierno (D.) and published by . This book was released on 2000 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interactions in the Marine Benthos by : Stephen J. Hawkins
Download or read book Interactions in the Marine Benthos written by Stephen J. Hawkins and published by Cambridge University Press. This book was released on 2019-08-29 with total page 535 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive account of how abiotic and biotic interactions shape patterns of coastal marine biodiversity and ecosystem processes globally.
Book Synopsis השפעת מצבי פער בינאישי ומהות התפקיד המבוצע על התנהגות תחרותית של ילדים בשתי קבוצות גיל by :
Download or read book השפעת מצבי פער בינאישי ומהות התפקיד המבוצע על התנהגות תחרותית של ילדים בשתי קבוצות גיל written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Global Invader by : Sylvia Behrens Yamada
Download or read book Global Invader written by Sylvia Behrens Yamada and published by . This book was released on 2001 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Writing to educate those concerned with sea life in the Pacific Northwest, Yamada (zoology, Oregon State U., Corvallis) traces the generally devastating impact of the invasive European green crab with reference to research carried out in New England, California, Oregon, South Africa, Australia, and Tasmania. A full description of the biology and life history of the European green crab is provided, along with photos, glossary, list of references, and descriptive table of Pacific Northwest crabs. Annotation copyrighted by Book News, Inc., Portland, OR.
Book Synopsis Prey Selection by Young Green Crabs (Carcinus Maenas), Rock Crabs (Cancer Irroratus) and American Lobsters (Homarus Americanus) in the Gulf of Maine by : Joseph Sungail
Download or read book Prey Selection by Young Green Crabs (Carcinus Maenas), Rock Crabs (Cancer Irroratus) and American Lobsters (Homarus Americanus) in the Gulf of Maine written by Joseph Sungail and published by . This book was released on 2010 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intertidal zone in the Gulf of Maine supports large populations of three species of decapods. Young green crabs (Carcinus maenas), rock crabs (Cancer irroratus) and American lobsters (Homarus americanus) co-exist in close proximity and forage on similar prey species. Competition for prey resources could have major implications for the populations of these predators. This experimental study focuses on determining the potential for interspecific competition between these decapods for prey resources. Young green crabs (25 - 35 mm carapace width), rock crabs (25 - 35 mm carapace width) and American lobsters (25 - 35 mm carapace length) were collected along with the prey species blue mussels (Mytilus sp.), rock barnacles (Semibalanus balanoides) and common southern kelp (Saccarina latissima) from the intertidal of the southern section of Saco Bay in the Gulf of Maine.l Claw measurements were taken, prey size and prey species preference were tested and caloric value of prey was determined. Morphological measurements indicated that all three decapod species had different sized chela relative to body size. The three predators preferred similar sized mussels and barnacles, and had similar handling times for both of these prey species. None of the three predator species consumed measurable amounts of kelp. Rock crabs and lobsters preferentially selected mussels over barnacles, while green crabs consumed equal amounts of both prey species. The preferred mussel size was smaller than the calculated optimum while the optimal barnacle size was eaten. These results suggest that while green crabs, rock crabs and lobsters have differing claw morphologies, they select similar prey and consume prey at the same rate. Therefore there is a possibility of intense interspecific competition among these predators.
Book Synopsis Biological Invasions in Marine Ecosystems by : Gil Rilov
Download or read book Biological Invasions in Marine Ecosystems written by Gil Rilov and published by Springer Science & Business Media. This book was released on 2008-11-12 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological invasions are considered to be one of the greatest threats to the integrity of most ecosystems on earth. This volume explores the current state of marine bioinvasions, which have been growing at an exponential rate over recent decades. Focusing on the ecological aspects of biological invasions, it elucidates the different stages of an invasion process, starting with uptake and transport, through inoculation, establishment and finally integration into new ecosystems. Basic ecological concepts - all in the context of bioinvasions - are covered, such as propagule pressure, species interactions, phenotypic plasticity, and the importance of biodiversity. The authors approach bioinvasions as hazards to the integrity of natural communities, but also as a tool for better understanding fundamental ecological processes. Important aspects of managing marine bioinvasions are also discussed, as are many informative case studies from around the world.
Book Synopsis Physiological Responses of the Crabs Carcinus Maenas and Cancer Irroratus to the Combined Challenges of Digestion and Low Salinity by : Chantelle Marie Penney
Download or read book Physiological Responses of the Crabs Carcinus Maenas and Cancer Irroratus to the Combined Challenges of Digestion and Low Salinity written by Chantelle Marie Penney and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Osmoregulation and digestion are energetically demanding processes that typically result in an increase in metabolic rate. Crabs that move into low salinity environments to feed must be able to balance the demands of both processes. However, achieving this balance may pose greater challenges for weak osmoregulators and conformers than for stronger regulators. In this study, the rate of oxygen consumption (MO2) of green crabs (Carcinus maenas, an efficient osmoregulator) and rock crabs (Cancer irroratus, a weak osmoregulator) was examined as a function of feeding and salinity. MO2 increased over 2-fold in both species after feeding in 32‰ and returned to pre-fed values in 17-20 hours. When fasted crabs were given an acute hyposaline exposure (24 and 16‰ for C. irroratus; 16 and 8‰ for C. maenas), MO2 increased and remained elevated with lower salinities resulting in higher peak values for MO2. When challenged with low salinity after feeding, C. maenas responded with an immediate addition of the MO2 due to feeding upon that due to salinity stress, whereas C. irroratus reacted with a delayed increase in MO2 following the salinity drop. Several aspects of their physiology and behaviour were investigated in an attempt to explain these differences. Although protein synthesis is reported to account for the majority of the postprandial increase in MO2, this did not appear to be the case in this study. There was no effect of feeding or low salinity on protein synthesis rates in the leg, gills, or hepatopancreas of either species, and this suggests that protein synthesis can continue in low salinity as long as substrates are available. Further, the behaviour (i.e. activity) of the crabs and aspects of their mechanical digestion could not explain the differences in MO2. C. irroratus became more active than C. maenas in low salinity, and C. irroratus exhibited a trend towards a decrease in gut contraction rate which resulted in longer transit times of the meal through the gut in this species. This reduction in gastric processing may have stemmed from an inability of C. irroratus to regulate osmotic water onload as efficiently as C. maenas, and this likely delayed the additive effect of the metabolic demands of digestion and salinity stress.
Book Synopsis Temperature and Predator Effects on Green Crabs (Carcinus Maenas) and Their Distribution in South Slough National Estuarine Research Reserve by :
Download or read book Temperature and Predator Effects on Green Crabs (Carcinus Maenas) and Their Distribution in South Slough National Estuarine Research Reserve written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The invasive green crab (Carcinus maenas) has increased in abundance and distribution among Oregon's estuaries. Its global success in establishing in new environments and tolerance for abiotic stressors, such as temperature, raises concern for C. maenas to negatively influence native crab species, especially given global climate change. To improve in predicting invasion impacts, this work analyzed the results from a controlled tank experiment at Portland State University and the field data on a population of C. maenas in South Slough National Estuarine Research Reserve (SSNERR). The aquarium experiment documented predation pressure on C. maenas across a range of temperatures (9° to 30°C) and predatory crabs Callinectes sapidus, Cancer productus, and, as a control C. maenas. The behavioral responses of prey C. maenas were observed across temperature and predator combinations. There were five categories of behavioral responses measured in time duration. The west Atlantic C. sapidus preyed heavily on C. maenas, especially at warmer water temperatures; however, east Pacific C. productus preyed much less on C. maenas and only at the cold temperatures, suggesting different trajectories of biotic resistance across the coasts as waters warm. Crab behavior aligned with the predation findings. For example, C. productus were most active at 9°C and all died at 27°C and higher. In tanks with C. productus, C. maenas were most aggressive at warm temperatures. In contrast C. maenas spent more time feeding at 9°C when in tanks with C. sapidus and, surprisingly, also with C. productus. Crab trap data from SSNERR was plotted on a map to identify surrounding habitat and bottom substrate of areas with high catch per unit effort (CPUE) of C. maenas in the last six years. Mean CPUE of C. maenas was below five throughout the SSNERR region with sites closest to the mouth of the estuary having the highest CPUE rates. Little structure was surrounding trapping sites; however, there was seagrass at sites with the highest CPUE of C. maenas. The mean CPUE difference of native species prior to (2002-2016) and following (2016-2021) C. maenas abundance increase in 2016 was compared to the mean CPUE of C. maenas in the last six years. Results indicated no correlation between the CPUE of C. maenas influencing the difference of CPUE of native crab species. The tolerance and predation avoidance demonstrated from prey C. maenas in warmer temperatures indicate their ability to acclimate and/or adapt in stressful climate change conditions of higher water temperatures. This is of concern due to the increasing potential to negatively affect Oregon native crab species, such as C. productus over time.
Book Synopsis Crabs in Cold Water Regions by : A. J. Paul
Download or read book Crabs in Cold Water Regions written by A. J. Paul and published by Alaska Sea Grant College Program. This book was released on 2002 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international group of specialists presented these 53 papers at the sixth crab symposium in the Lowell Wakefield symposium series at the U. of Alaska in January of 2001. The main themes include crab life cycles, reproductive biology and behavior, recruitment and population dynamics, fisheries and stock assessment, environment and habitat, and fisheries management. Individual papers present the results of research on topics that include the bitter crab syndrome in Tanner crab, re-stratification of red king crab assessment, population structure of blue king crab, habitat use by juvenile crabs, the impact of the European green crab in the Pacific, and use of tag recapture data to estimate natural mortality. Annotation copyrighted by Book News, Inc., Portland, OR.
Book Synopsis Population Dynamics and Interactions Between Invasive Green Crabs (Carcinus Maenas) and Native Rock Crabs (Cancer Irroratus) in Intertidal Zones of the Upper Bay of Fundy by : Hannah Kienzle
Download or read book Population Dynamics and Interactions Between Invasive Green Crabs (Carcinus Maenas) and Native Rock Crabs (Cancer Irroratus) in Intertidal Zones of the Upper Bay of Fundy written by Hannah Kienzle and published by . This book was released on 2015 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies in Adaptation by : Steve Rebach
Download or read book Studies in Adaptation written by Steve Rebach and published by John Wiley & Sons. This book was released on 1983 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Competitive Constraints on Foraging the Shore Crab Carcinus Maenas by : Andrew David Evans
Download or read book Competitive Constraints on Foraging the Shore Crab Carcinus Maenas written by Andrew David Evans and published by . This book was released on 1992 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecological Assessment of the Invasive European Green Crab (Carcinus Maenas) in Newfoundland 2007-2009 by :
Download or read book Ecological Assessment of the Invasive European Green Crab (Carcinus Maenas) in Newfoundland 2007-2009 written by and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
