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You searched for: Subject community structure Remove constraint Subject: community structure Subject term cages Remove constraint Subject term: cages
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1. Organization of the New England Rocky Intertidal Community: Role of Predation, Competition, and Environmental Heterogeneity

Author:
Bruce A. Menge
Source:
Ecological monographs 1976 v.46 no.4 pp. 355-393
ISSN:
0012-9615
Subject:
Ascophyllum nodosum; Balanus; Fucus; Mytilus edulis; algae; cages; canopy; carnivores; community structure; conservation areas; experimental design; herbivores; interspecific competition; intraspecific competition; littoral zone; microhabitats; mussels; population ecology; predation; predators; prey species; shade; snails; species richness; spring; stainless steel; storms; summer; winter; Maine; Massachusetts; New England region
Abstract:
... The influences of predation, competition, biological disturbance, exposure to wave action, and inclination and heterogeneity of the substratum on the structure of the rocky intertidal community of New England were studied with a combination of experiments and observations at six areas in Maine and Massachusetts from 1972—1975. Several aspects of community structure (seasonal utilization of primary ...
DOI:
10.2307/1942563

2. Effect of Grazing and Browsing Fishes on the Zonation of Corals in Guam

Author:
Steve Neudecker
Source:
Ecology 1979 v.60 no.4 pp. 666-672
ISSN:
0012-9658
Subject:
Scleractinia; browsing; cages; community structure; corals; fish; fish feeding; grazing; habitats; mucus; reefs; Guam
Abstract:
... Controlled coral transplant experiments were used to determine the effect of piscine corallivores on growth, zonation, and distribution of scleractinian corals in Guam. Pocillopora damicornis L. generally occurs only on the reef flat, reef margin (crest), and in lagoon habitats of the Indo—West Pacific. Although P. damicornis grows in deeper reef habitats in the eastern Pacific, it is seldom found ...
DOI:
10.2307/1936602

3. An Experimental Analysis of Biological Factors Contributing to Stream Community Structure

Author:
Barbara L. Peckarsky; Stanley I. Dodson
Source:
Ecology 1980 v.61 no.6 pp. 1283-1290
ISSN:
0012-9658
Subject:
cages; community structure; habitats; invertebrates; predators; streams; Colorado; Wisconsin
Abstract:
... Densities of invertebrates were manipulated within stony substrate filled cages in a Wisconsin and a Colorado stream to test the effects of prey densities on colonizaiton of the cages by invertebrate predators and potential competitors. There was no difference between the number of predators colonizing cages with high initial prey densities and that the colonizing cages with zero initial prey dens ...
DOI:
10.2307/1939035

4. The Role of Fish Predation and Spatial Heterogeneity in Determining Benthic Community Structure

Author:
Ellen Gilinsky
Source:
Ecology 1984 v.65 no.2 pp. 455-468
ISSN:
0012-9658
Subject:
Chironomidae; Lepomis macrochirus; autumn; benthic organisms; cages; community structure; fish; habitats; herbivores; littoral zone; macroinvertebrates; macrophytes; predation; seasonal variation; sediments; spatial variation; species diversity; summer; winter
Abstract:
... The effects of predation and spatial heterogeneity on the benthic macroinvertebrates in the littoral zone of a pond were investigated in a year—long caging experiment. Bluegill sunfish stocked at three densities within the cages were used as the predator. Heterogeneity was manipulated using artificial macrophytes. The presence of plants led to increases both in species richness and in density of m ...
DOI:
10.2307/1941408

5. Community Responses to Variable Predation: Field Studies With Sunfish and Freshwater Macroinvertebrates

Author:
Mark J. Butler IV
Source:
Ecological monographs 1989 v.59 no.3 pp. 311-328
ISSN:
0012-9615
Subject:
Lepomis macrochirus; Odonata; cages; censuses; community structure; fish; freshwater; habitats; lakes; littoral zone; macroinvertebrates; nuclear power industry; predation; prey species; spatial variation; species abundance; Florida
Abstract:
... I studied the impact of variable predation by bluegill sunfish on macroinvertebrate prey in a North Florida lake. Underwater time—lapse cinematography and censuses of bluegill abundances in shallow, middepth, and deep habitats permitted estimation of predation intensity and variability within and among lake habitats. I then incorporated predation rates typical of the middepth zone in caging experi ...
DOI:
10.2307/1942604

6. Priority effects in coral reef fish communities

Author:
Glenn R. Almany
Source:
Ecology 2003 v.84 no.7 pp. 1920-1935
ISSN:
0012-9658
Subject:
Acanthuridae; Labridae; Muraenidae; Pomacentridae; cages; community structure; coral reefs; fish communities; grouper; juveniles; larvae; mortality; piscivores
Abstract:
... Demographically open communities are often viewed as stochastically structured assemblages because most colonizing juveniles arrive via unpredictable dispersal mechanisms. However, interactions between established residents and incoming juveniles may affect juvenile persistence in species‐specific ways and could therefore impose a degree of determinism on future community structure. Using 16 spati ...
DOI:
10.1890/0012-9658(2003)084[1920:PEICRF]2.0.CO;2

7. Removal experiment reveals limited effects of a behaviorally dominant species on ant assemblages

Author:
Heloise Gibb; Dieter F. Hochuli
Source:
Ecology 2004 v.85 no.3 pp. 648-657
ISSN:
0012-9658
Subject:
Iridomyrmex purpureus; baits; cages; community structure; fauna; foraging; sandstone; social dominance; surveys; Australia
Abstract:
... Ant communities are thought to consist of a competitive hierarchy of interacting species, with an assemblage of subordinate species being structured by a dominant species. Mensurative and behavioral studies suggest a significant role for competition in structuring ant communities, although there are few experimental studies to support this contention. We examined the effect of the dominant ant Iri ...
DOI:
10.1890/03-0007

8. Environmental impact of capture-based bluefin tuna aquaculture on benthic communities in the western Mediterranean

Author:
Vita, Rubén; Marin, Arnaldo
Source:
Aquaculture research 2007 v.38 no.4 pp. 331-339
ISSN:
1355-557X
Subject:
Thunnus thynnus; benthic zone; cages; community structure; environmental assessment; environmental impact; environmental monitoring; farmed fish; farms; fish culture; remediation; sediments; surveys; tuna; Mediterranean Sea
Abstract:
... Tuna farming is based on fishing bluefin tuna in their natural habit of the western Mediterranean and fattening them in floating cages. Although this type of aquaculture is expanding rapidly in the Mediterranean Sea, very little information is available for an environmental impact assessment and environmental monitoring of tuna ranching. Spatial and temporal scales of impact need to be established ...
DOI:
10.1111/j.1365-2109.2007.01649.x

9. Effects of fish-farm biodeposition on periphyton assemblages on artificial substrates in the southern Tyrrhenian Sea (Gulf of Castellammare, Sicily)

Author:
Mannino, Anna Maria; Sara, Gianluca
Source:
Aquatic ecology 2008 v.42 no.4 pp. 575-581
ISSN:
1386-2588
Subject:
fish culture; fish farms; aquatic plant culture; community structure; Phaeophyceae; community facilities; Cyanobacteria; periphyton; Chlorophyceae; cages; Rhodophyta; Bacillariophyceae; Tyrrhenian Sea; Sicily
Abstract:
... An algal assemblage growing on artificial substrata of fish-farm cages was investigated. Specifically, algal response to the effects of fish-farm facilities was studied, in order to identify a possible future descriptor of biodeposition impact. Some sites were positioned upstream of the farms (at least 750 m; 'controls') and other sites were positioned downstream of the farms ('impacts'). All site ...
DOI:
10.1007/s10452-007-9131-1

10. Herbivore species richness and feeding complementarity affect community structure and function on a coral reef

Author:
Burkepile, Deron E.; Hay, Mark E.
Source:
Proceedings of the National Academy of Sciences of the United States of America 2008 v.105 no.42 pp. 16201-16206
ISSN:
0027-8424
Subject:
cages; community structure; complementary foods; coral reefs; corals; ecosystems; feeding methods; fish; food webs; herbivores; infant feeding; macroalgae; mortality; species diversity
Abstract:
... Consumer effects on prey are well known for cascading through food webs and producing dramatic top-down effects on community structure and ecosystem function. Bottom-up effects of prey (primary producer) biodiversity are also well known. However, the role of consumer diversity in affecting community structure or ecosystem function is not well understood. Here, we show that herbivore species richne ...
DOI:
10.1073/pnas.0801946105
PubMed:
18845686
PubMed Central:
PMC2565647

11. Shading facilitates sessile invertebrate dominance in the rocky subtidal gulf of maine

Author:
Robert J. Miller; Ron J. Etter
Source:
Ecology 2008 v.89 no.2 pp. 452-462
ISSN:
0012-9658
Subject:
Ascidiacea; Bryozoa; Cirripedia; cages; community structure; corals; granite; larvae; macroalgae; mortality; phototaxis; predation; shade; tropics; water flow; Gulf of Maine
Abstract:
... Dramatic shifts in community composition occur between vertical and horizontal rocky surfaces in subtidal environments worldwide, yet the forces mediating this transition are poorly understood. Vertical rock walls are often covered by lush, diverse communities of sessile suspension‐feeding invertebrates, while adjacent horizontal substrates are dominated by algae, or corals in the tropics. Multipl ...
DOI:
10.1890/06-1099.1

12. Natural densities of mesograzers fail to limit growth of macroalgae or their epiphytes in a temperate algal bed

Author:
Poore, Alistair G.B.; Campbell, Alexandra H.; Steinberg, Peter D.
Source:
Journal of ecology 2009 v.97 no.1 pp. 164-175
ISSN:
0022-0477
Subject:
Sargassum linearifolium; cages; community structure; epiphytes; field experimentation; fish; grazing; habitats; herbivores; invertebrates; macroalgae; plant communities; primary productivity; seagrasses
Abstract:
... 1. Herbivory is particularly intense in marine environments, with a higher proportion of primary productivity removed than in terrestrial habitats. Experimental manipulation of large herbivores (fish, urchins) has clearly documented their grazing impacts on algal and seagrass beds. Grazing impacts of mesograzers (small invertebrates such as amphipods and isopods) are, however, less understood due ...
DOI:
10.1111/j.1365-2745.2008.01457.x

13. Resource competition and shared natural enemies in experimental insect communities

Author:
Jones, Thomas S.; Godfray, H. Charles J.; van Veen, F. J. Frank
Source:
Oecologia 2009 v.159 no.3 pp. 627-635
ISSN:
0029-8549
Subject:
Acyrthosiphon pisum; Megoura viciae; Praon; Vicia faba; cages; carrying capacity; community structure; host plants; insect communities; interspecific competition; natural enemies; natural resources; parasitoids; population growth
Abstract:
... Much theory has been developed to explore how competition for shared resources (exploitation competition) or the presence of shared natural enemies (apparent competition) might structure insect and other communities. It is harder to predict what happens when both processes operate simultaneously. We describe an experiment that attempted to explore how shared natural enemies and resource competitio ...
DOI:
10.1007/s00442-008-1247-z
PubMed:
19082628

14. Relative influence of habitat complexity and proximity to patch edges on seagrass epifaunal communities

Author:
Moore, Eliza C.; Hovel, Kevin A.
Source:
Oikos 2010 v.119 no.8 pp. 1299-1311
ISSN:
0030-1299
Subject:
Zostera marina; biomass; cages; community structure; edge effects; fish; habitats; predation; predators; surveys; California
Abstract:
... Habitat structure at many scales influences faunal communities. Although habitat structure at different scales often covaries, studies rarely examine the relative effects of structure at multiple scales on faunal density and diversity. In shallow-water seagrass systems, epifaunal density at local scales generally increases with increased habitat structural complexity (e.g. shoot density per unit a ...
DOI:
10.1111/j.1600-0706.2009.17909.x

15. Do captive conditions favor shedding of parasites in the reared Atlantic bluefin tuna (Thunnus thynnus)?

Author:
I. Mladineo; T. Šegvić; M. Petrić
Source:
Parasitology international 2011 v.60 no.1 pp. 25-33
ISSN:
1383-5769
Subject:
Anisakis; Thunnus thynnus; aquaculture; cages; community structure; decision support systems; harvest date; longevity; models; monitoring; nestedness; parasites; parasitology; pathogens; rearing; species diversity; tuna
Abstract:
... Tuna (Thunnus spp.) has been characterized by long distance migrations, highly predatory behavior and longevity, all of which in turn, enable infections with a wide spectrum of different parasitic groups, reflecting in a remarkable diversity of tuna parasite communities. Since 2003, we have been monitoring parasite communities of Atlantic bluefin tuna (Thunnus thynnus) that are caught from the wil ...
DOI:
10.1016/j.parint.2010.09.007

16. Forestcheck: terrestrial vertebrate associations with fox control and silviculture in jarrah (Eucalyptus marginata) forest

Author:
Adrian F. Wayne; Graeme L. Liddelow; Matthew R. Williams
Source:
Australian forestry 2011 v.74 no.4 pp. 336-349
ISSN:
2325-6087
Subject:
reptiles; trees; forests; Tiliqua; pitfall traps; Eucalyptus marginata; ecosystems; frogs; harvesting; temporal variation; Acacia melanoxylon; autumn; community structure; monitoring; variance; foxes; species diversity; cages; logging; Bettongia; spring; Trichosurus vulpecula; Dasyurus; shelterwood systems; stand basal area; Vulpes vulpes; Western Australia
Abstract:
... Summary Terrestrial vertebrate associations with silviculture and other factors were investigated as part of the FORESTCHECK monitoring program in the jarrah (Eucalytpus marginata) forests of south-west Western Australia. A total of 48 integrated monitoring grids form the basis of this study—sampled over five years (2001–2006), across five ecosystem-defined regions (one sampled per year), each wit ...
DOI:
10.1080/00049158.2011.10676377

17. Influence of fish cage farming on water quality and plankton in fish ponds: A case study in the Rift Valley and North Shoa reservoirs, Ethiopia

Author:
Fasil Degefu; Seyoum Mengistu; Michael Schagerl
Source:
Aquaculture 2011 v.316 no.1-4 pp. 129-135
ISSN:
0044-8486
Subject:
Anabaenopsis; Copepoda; Oreochromis niloticus; Pediastrum; Rotifera; ammonium nitrogen; cage culture; cages; case studies; community structure; fish; fish culture; fish feeds; fish ponds; fish waste; highlands; nutrient content; nutrients; oxygen; phosphorus; phytoplankton; valleys; water quality; water reservoirs; zooplankton; Ethiopia
Abstract:
... The potential impact of Nile Tilapia (Oreochromis niloticus) cage culture on water quality and pelagic community composition was investigated in two Ethiopian small water bodies, one located in the highlands (Yemlo) and the other in the Great Rift Valley (Allage). This study was designed to assess the difference between the cages and open water in relation to those water quality changes attributab ...
DOI:
10.1016/j.aquaculture.2011.03.010

18. Effects of tribasic copper chloride on growth, copper status, antioxidant activities, immune responses and intestinal microflora of blunt snout bream (Megalobrama amblycephala) fed practical diets

Author:
Xian-Ping Shao; Wen-Bin Liu; Kang-Le Lu; Wei-Na Xu; Wei-Wei Zhang; Ying Wang; Jie Zhu
Source:
Aquaculture 2012 v.338-341 no. pp. 154-159
ISSN:
0044-8486
Subject:
Megalobrama amblycephala; animal growth; antioxidant activity; cages; chlorides; community structure; copper; feed conversion; feed supplements; fish feeding; immune response; intestines; kidneys; liver; microorganisms; weight gain
Abstract:
... A study was conducted to investigate the effects of dietary tribasic copper chloride on growth, copper status, antioxidant activities, immune responses and intestinal microflora in blunt snout bream, Megalobrama amblycephala. Eight practical diets containing different levels of copper (0, 3, 6, 9, 25, 50, 100 and 150mg Cukg⁻¹) from tribasic copper chloride were fed to blunt snout bream (31g of ini ...
DOI:
10.1016/j.aquaculture.2012.01.018

19. Influence of a dominant consumer species reverses at increased diversity

Author:
Margarita Brandt; Jon D. Witman; Angel I. Chiriboga
Source:
Ecology 2012 v.93 no.4 pp. 868-878
ISSN:
0012-9658
Subject:
Lytechinus; Tripneustes; Ulva; algae; benthic organisms; cages; community structure; ecosystems; grazing; habitats; islands; species diversity; Galapagos Islands
Abstract:
... Theory and experiments indicate that changes in consumer diversity affect benthic community structure and ecosystem functioning. Although the effects of consumer diversity have been tested in the laboratory and the field, little is known about effects of consumer diversity in the subtidal zone, one of the largest marine habitats. We investigated the grazing effects of sea urchins on algal abundanc ...
DOI:
10.1890/10-1785.1

20. Meiofauna as an indicator for assessing the impact of fish farming at an exposed marine site

Author:
Simone Mirto; Michele Gristina; Mauro Sinopoli; Giulia Maricchiolo; Lucrezia Genovese; Salvatrice Vizzini; Antonio Mazzola
Source:
Ecological indicators 2012 v.18 no. pp. 468-476
ISSN:
1470-160X
Subject:
Copepoda; Nematoda; Polychaeta; biodiversity; cages; carbon; chemistry; community structure; fish culture; fish farms; lipids; proteins; sediments; Mediterranean Sea; Sicily
Abstract:
... This study aimed to detect the impact of organic loads due to biodeposition from a fish farm in an exposed area of the Strait of Sicily, Mediterranean Sea. Sediment chemistry and meiofaunal assemblages were investigated on a seasonal basis at four stations: two from the impacted area and two control stations. The presence of the cages induced a significant accumulation of proteins, lipids and biop ...
DOI:
10.1016/j.ecolind.2011.12.015