scholarly journals Parasite community structure of cod from Bear Island (Barents Sea) and Pomeranian Bay (Baltic Sea)

2011 ◽  
Vol 32 (3) ◽  
pp. 253-262 ◽  
Author(s):  
Ewa Sobecka ◽  
Ewa Łuczak ◽  
Beata Więcaszek ◽  
Artur Antoszek
Keyword(s):  
Community Structure ◽  
Baltic Sea ◽  
Parasite Species ◽  
Barents Sea ◽  
Parasite Community ◽  
Mean Values ◽  
Parasite Communities ◽  
Higher Taxa ◽  
The Baltic ◽  
Pomeranian Bay

Parasite community structure of cod from Bear Island (Barents Sea) and Pomeranian Bay (Baltic Sea) A total of 142 cods: 60 from the South-East Ground of Bear Island and 82 from the Pomeranian Bay (Baltic Sea) were examined for their ecto- and endoparasites. Twenty different parasite species, comprising one Myxosporea, three Cestoda, four Digenea, seven Nematoda, three Acanthocephala and two Crustacea were found. The parasite component communities comprised 1446 individuals (17 species, six higher taxa) from the Bear Island and 6588 individuals (nine species, three higher taxa) from Pomeranian Bay. The observed parasite host specificity was low, and the intensity in a single fish ranged from one to 279 specimens. The eudominant parasite species were Echinorhynchus gadi, Hemiurus levinseni and Contracaecum osculatum. The dominant parasite communities from the Bear Island were nematodes, but acanthocephalans dominated in cod from the Baltic Sea. It appears that one group of parasites, better adapted for the specific conditions of the macrohabitat, has replaced another. The most prevalent parasites were E. gadi, Anisakis simplex, C. osculatum and Hysterothylacium aduncum, and the mean values of crowding were the highest for E. gadi and Pomphorhynchus laevis. The nematode Camallanus lacustris was noted in this host species for the first time. Only six species of parasites were common to cod from both fishing grounds.

Helminth communities of yellow perch (Perca flavescens (Mitchill)): determinants of pattern

2000 ◽  
Vol 78 (4) ◽  
pp. 538-555 ◽  
Author(s):  
J P Carney ◽  
T A Dick
Keyword(s):  
Community Structure ◽  
Yellow Perch ◽  
Trophic Status ◽  
Lake Michigan ◽  
Parasite Species ◽  
Local Level ◽  
Perca Flavescens ◽  
Parasite Community ◽  
Green Bay ◽  
Parasite Communities

Twenty-eight parasite species were recorded from 504 yellow perch (Perca flavescens) collected from Dauphin Lake and Beaufort Lake, Manitoba, and Lake Winnebago, Green Bay, and Lake Michigan, Wisconsin. Four parasite species, Diplostomum spp., Urocleidus adspectus, Proteocephalus pearsei, and Raphidascaris acus, occurred in perch from all localities. Infracommunities and component communities were low in richness. The Dauphin Lake and Beaufort Lake samples had the richest parasite communities, while those in the Green Bay and Lake Michigan samples were the least rich. The effect of host size and age on parasite community structure was equivocal. A positive association between P. pearsei and Bothriocephalus cuspidatus and more multispecies infracommunities than expected provide evidence of nonrandom associations in the Manitoba samples, while the Wisconsin infracommunities were random associations. Significant infracommunity nestedness in all samples indicated nonrandom community organization and structure. Parasite faunas were richer in samples with complex invertebrate communities than in samples with complex fish communities. The trophic status of the aquatic system indirectly affected the parasite communities by limiting the variety of potential intermediate hosts. Predictions regarding relationships between parasite community structure and lake trophic status were not supported. We show that predictable patterns at the fine-scale local level of the parasite infracommunity and component communities of perch are best explained by a rich invertebrate community upon which the host feeds.

Results of measuring the aerosol characteristics in 80th cruise of RV “Akademik Mstislav Keldysh” on the route from the Baltic Sea to the Barents Sea

2021 ◽  
Vol 34 (7) ◽  
pp. 515-523
Author(s):  
S.M. Sakerin ◽  
D.M. Kabanov ◽  
D.A. Kalashnikova ◽  
I.A. Kruglinsky ◽  
V.I. Makarov ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Barents Sea ◽  
The Baltic Sea ◽  
The Barents Sea ◽  
The Baltic

scholarly journals Interannual variation in the metazoan parasite communities of bigeye trevally Caranx sexfasciatus (Pisces, Carangidae)

Parasite ◽  
2020 ◽  
Vol 27 ◽  
pp. 6 ◽  
Author(s):  
Juan Violante-González ◽  
Scott Monks ◽  
Yesenia Gallegos-Navarro ◽  
Nataly G. Santos-Bustos ◽  
Princessa J. Villalba-Vasquez ◽  
...  
Keyword(s):  
Species Composition ◽  
Parasite Species ◽  
Single Species ◽  
Parasite Community ◽  
Component Community ◽  
Metazoan Parasites ◽  
Parasite Communities ◽  
Local Fluctuations ◽  
Low Diversity ◽  
Abiotic Environmental Factors

Parasite communities in Caranx sexfasciatus were characterized and analyzed to determine any interannual variations in structure and/or species composition. In total, 422 C. sexfasciatus were collected from Acapulco Bay, Mexico, between May 2016 and March 2019. Thirty-two taxa of metazoan parasites were identified: five Monogenea, thirteen Digenea, one Acanthocephala, one Cestoda, three Nematoda, seven Copepoda, and two Isopoda. Monogeneans were the most frequent and abundant parasite species in all sampling years. Parasite species richness at the component community level varied significantly from 8 (May 2016) to 25 (March 2019) and was similar to previous reports for other species of Carangidae. The component communities and infracommunities in C. sexfasciatus were characterized by low parasite species numbers, low diversity, and dominance of a single species (the monogenean Neomicrocotyle pacifica). Parasite community structure and species composition varied between sampling years and climatic seasons. Seasonal or local fluctuations in some biotic and abiotic environmental factors probably explain these variations.

Intestinal helminth parasites in flounderPlatichthys flesusfrom the River Thames: an infracommunity analysis

2004 ◽  
Vol 78 (4) ◽  
pp. 297-303 ◽  
Author(s):  
S. Guillen-Hernandez ◽  
P.J. Whitfield
Keyword(s):  
Parasite Species ◽  
Parasite Community ◽  
Intestinal Helminth ◽  
Helminth Parasites ◽  
Intermediate Hosts ◽  
Component Community ◽  
Parasite Communities ◽  
High Prevalence ◽  
Marine Influence ◽  
River Thames

AbstractAn analysis was undertaken of intestinal helminth communities in flounderPlatichthys flesusfrom two sites on the River Thames. A comparison was made between helminth community richness and diversity from these sites at the component and infracommunity levels. At the component community level, a richer and more diverse parasite community was found in flounder from the Tilbury location (marine influence) than that from the Lots Road location (freshwater influence). At the infracommunity level, more parasite species and parasite individuals per host were found at Lots Road and the percentage of similarity values were low at both locations. Helminth species with high prevalence values in the parasite communities of the flounder are the dominant species in any individual fish, harbouring multi-specific infections. The presence of more invertebrate species, which are intermediate hosts in the helminth life cycle in the Thames, fish vagility and the high prevalence and abundance values ofPomphorhynchus laevisin the flounder, may explain the differences between the two locations.

scholarly journals Community structure analysis of endoparasitic helminths of Anabas testudineus from unpolluted and polluted sites of a freshwater body of Dhaka

2014 ◽  
Vol 23 (1) ◽  
pp. 27-38
Author(s):  
Md Osman Ghani ◽  
Aminul Islam Bhuiyan ◽  
Jannatul Bushra
Keyword(s):  
Community Structure ◽  
Parasite Species ◽  
Parasite Community ◽  
Community Diversity ◽  
Polluted Water ◽  
Component Community ◽  
Anabas Testudineus ◽  
Host Sex ◽  
Host Habitat ◽  
Insignificant Difference

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. Host’s 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

Seasonal variability of phytoplankton in the shallow waters of the southern Baltic Sea

2018 ◽  
Vol 33 (1) ◽  
pp. 9-15
Author(s):  
Iwona Zabroś ◽  
Marlena Mioskowska
Keyword(s):  
Baltic Sea ◽  
Temporal Distribution ◽  
Environmental Parameters ◽  
Spatial And Temporal Variability ◽  
Sample Collection ◽  
The Baltic Sea ◽  
Mean Values ◽  
Southern Baltic Sea ◽  
Southern Baltic ◽  
The Baltic

The Baltic Sea is characterized by a seasonal variation of phytoplankton structure. These organisms are particularly sensitive to changes in various environmental parameters. Cyclic, recurring annually fluctuation of species composition, abundance and biomass of phytoplankton is a consequence of these changes. Spatial and temporal variability of particular groups of phytoplankton is not the same in different areas of the Baltic Sea. The purpose of this work was to determine the spatial and temporal distribution of phytoplankton in three chosen areas of the coastal zone of the southern Baltic Sea (Ustka, Poddąbie and Rowy) in the period of November 2014 - September 2016. Mean values of abundance and biomass of phytoplankton for the surveyed areas were typical for this type of coastal waters. In each of the surveyed areas the same dominat species in terms of the abundance and biomass were observed. A growth of diatoms was recorded only in the area of Ustka, which could have been caused by the inflow of river waters. Seasonal surveys of phytoplankton indicated that in the case of the studies regarding this parameter – taxonomic composition, abundance and biomass in the same surveyed area were similar at the three research stations (e.g. 75-80%), depending on the season of the year. On this basis, it was concluded that, whether carrying out the monitoring of phytoplankton or planned investments, the sample collection frequency had a greater significance than the number of research stations.

Community structure of digenean parasites of sparid and labrid fishes of the Mediterranean sea: a new approach

Parasitology ◽  
1999 ◽  
Vol 119 (6) ◽  
pp. 635-648 ◽  
Author(s):  
P. SASAL ◽  
N. NIQUIL ◽  
P. BARTOLI
Keyword(s):  
Spatial Distribution ◽  
Mediterranean Sea ◽  
Digestive Tract ◽  
Parasite Species ◽  
Parasite Community ◽  
Community Studies ◽  
Biological Factors ◽  
Parasite Communities ◽  
The Mediterranean ◽  
First Time

The aim of this work was to study the structure of the parasite communities of Digeneans of 2 families of Teleost fishes (Sparidae and Labridae) of the Mediterranean sea. We tried to quantify the importance of both the microhabitat requirements of the parasite species and the effect of host biological factors on the parasite communities. We applied, for the first time in parasite community studies, the Canonical Correspondence Analysis (CCA) to analyse (i) the spatial distribution of parasite species within the digestive tract of the hosts; (ii) the host's biological factors (such as diet, host length, gregariousness and abundance) that may influence this spatial distribution of parasite species. Our results showed that potential microhabitats were vacant in the 2 host families studied revealing a lack of niche saturation because either there was little inter- and/or intraspecific competition or there were enough available space and resources within the host. Our results also indicated that the position of the parasite in the digestive tract is much more important than host biological factors for the structure of parasite community. Finally, we highlight the potential use of the CCA method for controlling for phylogenetic constraints in multi-species analyses.

scholarly journals The northern European shelf as increasing net sink for CO<sub>2</sub>

2020 ◽  
Author(s):  
Meike Becker ◽  
Are Olsen ◽  
Peter Landschützer ◽  
Abdirhaman Omar ◽  
Gregor Rehder ◽  
...  
Keyword(s):  
Baltic Sea ◽  
North Sea ◽  
Barents Sea ◽  
The Baltic Sea ◽  
Surface Ocean ◽  
The North ◽  
Northern European ◽  
The Barents Sea ◽  
The North Sea ◽  
The Baltic

Abstract. We developed a simple method to refine existing open ocean maps towards different coastal seas. Using a multi linear regression we produced monthly maps of surface ocean fCO2 in the northern European coastal seas (North Sea, Baltic Sea, Norwegian Coast and in the Barents Sea) covering a time period from 1998 to 2016. A comparison with gridded SOCAT v5 data revealed standard deviations of the residuals 0 ± 26 μatm in the North Sea, 0 ± 16 μatm along the Norwegian Coast, 0 ± 19 μatm in the Barents Sea, and 2 ± 42 μatm in the Baltic Sea.We used these maps as basis to investigate trends in fCO2, pH and air-sea CO2 flux. The surface ocean fCO2 trends are smaller than the atmospheric trend in most of the studied region. Only the western part of the North Sea is showing an increase in fCO2 close to 2 μatm yr−1, which is similar to the atmospheric trend. The Baltic Sea does not show a significant trend. Here, the variability was much larger than possibly observable trends. Consistently, the pH trends were smaller than expected for an increase of fCO2 in pace with the rise of atmospheric CO2 levels. The calculated air-sea CO2 fluxes revealed that most regions were net sinks for CO2. Only the southern North Sea and the Baltic Sea emitted CO2 to the atmosphere. Especially in the northern regions the sink strength increased during the studied period.

scholarly journals The northern European shelf as an increasing net sink for CO<sub>2</sub>

2021 ◽  
Vol 18 (3) ◽  
pp. 1127-1147
Author(s):  
Meike Becker ◽  
Are Olsen ◽  
Peter Landschützer ◽  
Abdirhaman Omar ◽  
Gregor Rehder ◽  
...  
Keyword(s):  
Baltic Sea ◽  
North Sea ◽  
Barents Sea ◽  
The Baltic Sea ◽  
Surface Ocean ◽  
The North ◽  
Northern European ◽  
The Barents Sea ◽  
The North Sea ◽  
The Baltic

Abstract. We developed a simple method to refine existing open-ocean maps and extend them towards different coastal seas. Using a multi-linear regression we produced monthly maps of surface ocean fCO2 in the northern European coastal seas (the North Sea, the Baltic Sea, the Norwegian Coast and the Barents Sea) covering a time period from 1998 to 2016. A comparison with gridded Surface Ocean CO2 Atlas (SOCAT) v5 data revealed mean biases and standard deviations of 0 ± 26 µatm in the North Sea, 0 ± 16 µatm along the Norwegian Coast, 0 ± 19 µatm in the Barents Sea and 2 ± 42 µatm in the Baltic Sea. We used these maps to investigate trends in fCO2, pH and air–sea CO2 flux. The surface ocean fCO2 trends are smaller than the atmospheric trend in most of the studied regions. The only exception to this is the western part of the North Sea, where sea surface fCO2 increases by 2 µatm yr−1, which is similar to the atmospheric trend. The Baltic Sea does not show a significant trend. Here, the variability was much larger than the expected trends. Consistently, the pH trends were smaller than expected for an increase in fCO2 in pace with the rise of atmospheric CO2 levels. The calculated air–sea CO2 fluxes revealed that most regions were net sinks for CO2. Only the southern North Sea and the Baltic Sea emitted CO2 to the atmosphere. Especially in the northern regions the sink strength increased during the studied period.

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