Life history, ecology and parasite community structure in Soviet birds

Community structure of metazoan endoparasites of Anabas testudineus collected from an unpolluted and a polluted water body was determined. Out of 100 A. testudineus observed, 78% was parasitized by at least one species of endohelminth parasite. Eight metazoan endoparasites were recorded. Nematode showed higher prevalence than trematode. One species was accounted as satellite species and others as secondary. Larger hosts were more abundantly infected than the smaller ones as positive correlation was observed between the standard length of the hosts and the abundance/ prevalence of all parasites. Maximum parasite species followed a typical overdispersed type of distribution pattern. Parasite species richness was lower in fish from polluted (4) than unpolluted water (6). Per cent similarity of infestation between the sample hosts was high (55.73%). Three common parasite species from both sample hosts showed insignificant difference in intensity of infestation in relation to host habitat. Host sex had influenced infestation at infra?community but not at component community level. Interspecies association between parasites was strong in fish from unpolluted in comparision from polluted water. Hosts habitat quality also played an influential role in building parasite community, diversity and other associated community indices. DOI: http://dx.doi.org/10.3329/dujbs.v23i1.19823 Dhaka Univ. J. Biol. Sci. 23(1): 27-38, 2014

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Spatial and temporal repeatability in parasite community structure of tropical fish hosts

Parasitology ◽

10.1017/s0031182003003792 ◽

2003 ◽

Vol 127 (4) ◽

pp. 387-398 ◽

Cited By ~ 56

Author(s):

V. M. VIDAL-MARTÍNEZ ◽

R. POULIN

Keyword(s):

Community Structure ◽

Marine Fish ◽

Fish Species ◽

Cichlid Fish ◽

Positive Association ◽

Parasite Community ◽

Tropical Fish ◽

Freshwater Species ◽

Interspecific Associations ◽

Red Grouper

An assessment is made of the repeatability of parasite community structure in space for a marine fish, and in space and time for a freshwater fish from south-eastern Mexico. The marine fish species was the red grouper,Epinephelus morio(collected from 9 localities), and the freshwater species was the cichlid,Cichlasoma urophthalmus(collected from 6 localities: including monthly at 2 localities for 1 year, and bimonthly at 1 locality in 1990 and 1999). Pairwise interspecific associations and analyses of nested patterns in the distributions of parasite species among hosts were used in both fish species, with comparisons over time made only with the cichlid. Positive interspecific associations, and nested patterns were noted in some localities for both fish species, and/or at some sampling times for the cichlid fish. However, non-random patterns in the structure of parasite communities in these 2 host species only were observed sporadically. When present, nestedness in both fish species was apparently linked with a positive association between total infection intensities and fish size. Additionally, adjacent localities were more likely to display similar parasite community structure than distant ones. This preliminary result suggests that distance between localities is an important determinant of predictability in parasite community structure.

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Interactions between oak tannins and parasite community structure: Unexpected benefits of tannins to cynipid gall-wasps

Oecologia ◽

10.1007/bf00377292 ◽

1987 ◽

Vol 71 (2) ◽

pp. 254-261 ◽

Cited By ~ 69

Author(s):

M. L. Taper ◽

T. J. Case

Keyword(s):

Community Structure ◽

Parasite Community ◽

Gall Wasps

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Spatial and temporal predictability of the parasite community structure of a benthic marine fish along its distributional range

International Journal for Parasitology ◽

10.1016/j.ijpara.2005.07.016 ◽

2005 ◽

Vol 35 (13) ◽

pp. 1369-1377 ◽

Cited By ~ 42

Author(s):

M.T. González ◽

R. Poulin

Keyword(s):

Community Structure ◽

Marine Fish ◽

Parasite Community ◽

Distributional Range ◽

Temporal Predictability

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Assessing uncertainty of a multispecies size-spectrum model resulting from process and observation errors

ICES Journal of Marine Science ◽

10.1093/icesjms/fsv086 ◽

2015 ◽

Vol 72 (8) ◽

pp. 2223-2233 ◽

Cited By ~ 17

Author(s):

Chongliang Zhang ◽

Yong Chen ◽

Yiping Ren

Keyword(s):

Life History ◽

Community Structure ◽

Fisheries Management ◽

Dynamic Models ◽

Environmental Variability ◽

Size Spectrum ◽

Sampling Errors ◽

Fishing Activity ◽

Scale Parameters ◽

Spectrum Model

AbstractEcosystem models, specifically multispecies dynamic models, have been increasingly used to project impacts of fishing activity on the trophodynamics of ecosystems to support ecosystem-based fisheries management. Uncertainty is unavoidable in modelling processes and needs to be recognized and properly quantified before models are utilized. Uncertainty was assessed in this study for a multispecies size-spectrum model that quantifies community structure and ecological characteristics. The uncertainty was assumed to result from errors in fish life-history and metabolic scale parameters, environmental variability, fishing variability, and sampling errors. Given the same level of imprecision, metabolic scale parameters had the dominant influence on the uncertainty of the size spectrum modelling results, followed by life-history parameters. Both types of errors led to “scenario uncertainty”, suggesting the possible existence of alternative states of community structure. Environmental variability, fishing variability, and observation errors resulted in “statistical uncertainty”, implying that such uncertainty can be described adequately in statistical terms. The results derived from such a simulation study can provide guidance for identifying research priorities to help narrow the gap in scientific knowledge and reduce the uncertainty in fisheries management.

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Community Structure and Biomass of Euphausiids in the Bay of Fundy

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f82-045 ◽

1982 ◽

Vol 39 (2) ◽

pp. 326-334 ◽

Cited By ~ 16

Author(s):

D. W. Kulka ◽

S. Corey ◽

T. D. Iles

Keyword(s):

Life History ◽

Community Structure ◽

Vertical Migration ◽

High Intensity ◽

Sampling Scheme ◽

Bay Of Fundy ◽

Migration Patterns ◽

Life History Stages ◽

Diurnal Vertical Migration ◽

Meganyctiphanes Norvegica

Seven species of euphausiids were found in the Bay of Fundy: Meganyctiphanes norvegica, Thysanoessa inermis, T. longicaudata, T. raschii, T. gregaria, Euphausia krohnii, and Nematoscelis megalops (listed in descending order of abundance). A high-intensity sampling scheme during November and March facilitated detailed distributional studies which revealed that M. norvegica, T. inermis, and T. longicaudata each had a specific stationary center of abundance in the study area, and each species performed a different pattern of diurnal vertical migration. Meganyctiphanes norvegica formed 90% (constituting 70 kt) of the euphausiids. The last four species were occasional immigrants from areas south of the Bay of Fundy. From the relationships between life history stages, vertical migration patterns, distribution, and currents in the Fundy Region, we suggest that these euphausiid species form stocks.Key words: euphausiids, Meganyctiphanes norvegica, Thysanoessa inermis, Thysanoessa longicaudata, biomass, community structure, stock, Bay of Fundy

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Temperature regimes impact coral assemblages along environmental gradients on lagoonal reefs in Belize

10.1101/036400 ◽

2016 ◽

Author(s):

Justin H. Baumann ◽

Joseph E. Townsend ◽

Travis A. Courtney ◽

Hannah E. Aichelman ◽

Sarah W. Davies ◽

...

Keyword(s):

Life History ◽

Community Structure ◽

Coral Reefs ◽

Coral Species ◽

Environmental Gradients ◽

Coral Community ◽

Life History Strategies ◽

Percent Cover ◽

Chl A ◽

Reef System

AbstractCoral reefs are increasingly threatened by global and local anthropogenic stressors such as rising seawater temperature, nutrient enrichment, sedimentation, and overfishing. Although many studies have investigated the impacts of local and global stressors on coral reefs, we still do not fully understand how these stressors influence coral community structure, particularly across environmental gradients on a reef system. Here, we investigate coral community composition across three different temperature and productivity regimes along a nearshore-offshore gradient on lagoonal reefs of the Belize Mesoamerican Barrier Reef System (MBRS). A novel metric was developed using ultra-high-resolution satellite-derived estimates of sea surface temperatures (SST) to classify reefs as exposed to low (lowTP), moderate (modTP), or high (highTP) temperature parameters over 10 years (2003 to 2012). Coral species richness, abundance, diversity, density, and percent cover were lower at highTP sites relative to lowTP and modTP sites, but these coral community traits did not differ significantly between lowTP and modTP sites. Analysis of coral life history strategies revealed that highTP sites were dominated by hardy stress tolerant and fast-growing weedy coral species, while lowTP and modTP sites consisted of competitive, generalist, weedy, and stress-tolerant coral species. Satellite-derived estimates of Chlorophyll-a (chl-a) were obtained for 13-years (2003-2015) as a proxy for primary production. Chl-a concentrations were highest at highTP sites, medial at modTP sites, and lowest at lowTP sites. Notably, thermal parameters correlated better with coral community traits between site types than productivity, suggesting that temperature (specifically number of days above the thermal bleaching threshold) played a greater role in defining coral community structure than productivity on the MBRS. Dominance of weedy and stress-tolerant genera at highTP sites suggests that corals utilizing these two life history strategies may be better suited to cope with warmer oceans and thus may warrant protective status under climate change.

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