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Wyświetlanie 1-15 z 20
Tytuł:
Adaptive response of parasites to the thermal factor
Autorzy:
Zharikova, T.
Izyumova, N.
Stepanova, M.
Powiązania:
https://bibliotekanauki.pl/articles/838530.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
water body
Monogenea
thermal factor
Dactylogyrus
chitinoid formation
copepod
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Astaxanthin, canthaxanthin and astaxanthin esters in the copepod Acartia bifilosa (Copepoda, Calanoida) during ontogenetic development
Autorzy:
Lotocka, M.
Styczynska-Jurewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/48096.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
canthaxanthin
Pomeranian Bay
ontogenetic development
astaxanthin
Baltic Sea
Calanoida
Acartia bifilosa
astaxanthin ester
Gdansk Gulf
Copepoda
copepod
Opis:
The contents of astaxanthin, canthaxanthin and astaxanthin esters were studied in natural populations of the copepod Acartia bifilosa from the Pomeranian Bay and Gulf of Gdańsk in the southern Baltic Sea. Samples dominated by any one of three developmental groups: (1) nauplii, (2) copepodids I–III and (3) copepodids IV–V and adults of Acartia bifilosa were analysed by means of high performance liquid chromatography (HPLC). As ontogenetic development progressed, significant changes occurred in the proportion of particular pigments in the total pigment pool of the various developmental groups. Astaxanthin and canthaxanthin occurred in all the groups, the former being clearly dominant. However, an increasing percentage of astaxanthin esters was recorded in the copepodids I–III, and even more in the copepodids IV–V and adults group. Most probably, astaxanthin is the main pigment active in copepod lipid metabolism. Carotenoid pigments in copepods very likely act as efficient free-electron quenchers and may be involved as antioxidants in rapid lipid metabolism. The exogenously feeding stages (late nauplii and copepodids) transform plant carotenoids taken from food and are evidently capable of metabolising astaxanthin by esterification and further degradation. It is emphasised that, according to literature data, astaxanthin esters may have an even higher quenching ability. It is suggested that crustacean carotenoid pigments, with their electron donor-acceptor abilities, may replace oxygen in peroxidation processes connected with lipid metabolism. The consequences of such a physiological role of astaxanthin for present-day estimations of energy balances in zooplankton communities are mentioned.
Źródło:
Oceanologia; 2001, 43, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental influence on infestation of the parasitic copepods, Ergasilus latus Fryer, 1960, in Sarotherodon melanotheron (Actinopterygii: Cichlidae), from coastal lagoons in Ghana
Autorzy:
Rokicki, J.
Armah, A.K.
Sywula, T.
Skorkowski, E.
Hristovski, N.
Stojanowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/5700.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
environmental factor
infestation
parasite
parasitic copepod
copepod
Ergasilus latus
Sarotherodon melanotheron Actinopterygii
Cichlidae
coastal lagoon
Ghana
Źródło:
Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epibionts (Paracineta) and parasites (Ellobiopsis) on copepods from Spitsbergen (Kongsfjorden area)
Autorzy:
Walkusz, W.
Rolbiecki, L.
Powiązania:
https://bibliotekanauki.pl/articles/48642.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
parasite
zooplankton
Paracineta
Ellobiopsis
Spitsbergen
Kongsfjorden area
body surface
copepod
epibiont
Opis:
Parasites of the genus Ellobiopsis and epibiontic ciliates of the genus Paracineta were found on the body surface of some copepod taxa collected in the Kongsfjorden area (west Spitsbergen, Svalbard) during summer 2002. Paracineta sp. individuals were noted in Metridia longa and Paraeuchaeta norvegica (0.5% of the population infected in each species). This study provides the first record of the presence of Paracineta sp. in the latter species. Remarkably, epibionts were attached exclusively to females. Calanus finmarchicus and C. glacialis were invaded by Ellobiopsis spp., but the level of infection was generally low (0.06% and 0.09% of the population infected, respectively). Parasite distribution within both host populations was similar – 80% of infected specimens were at copepodid stage V. This study also provides the first record of C. glacialis serving as a host to Ellobiopsis.
Źródło:
Oceanologia; 2007, 49, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of human-altered hydrographical setting on the copepod community structure in an extensive tropical estuary along the Southwest Coast of India
Autorzy:
Nagarathinam, A.
Retnamma, J.
Loganathan, J.
Singaram, P.
Arayillath, A.
Jose, A.K.
Powiązania:
https://bibliotekanauki.pl/articles/2079004.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
mesozooplankton
copepod
multivariate analysis
saline water
sea water intrusion
aquatic environment
tropical estuary
India coast
Opis:
This study presents how human-altered hydrographical settings (flow restrictions) impacts the natural distribution and community structure of copepods in the Kochi Backwaters (KBW), the largest monsoonal estuary along the southwest coast of India. This study is primarily based on an extensive seasonal sampling in the KBW and their comparison with a historical data set. Thannermukkom Barrage (TB) was built in the southern section of the KBW in the 1970s to prevent saline water intrusion to the upstream during the non-monsoon periods. Thirteen locations (1—4 in the downstream, 5—9 in the midstream, and 10—13 in the upstream) were sampled in this study over the entire stretch of the KBW during the Pre-Southwest Monsoon (PRM), Southwest Monsoon (SWM), and Post-Southwest Monsoon (PSWM). The overall effect of TB in the KBW is a seaward push of mesohaline conditions during all seasons with varying intensities. In response to the seaward push of mesohaline conditions, copepods Acartiella keralensis, Acartia plumosa, Acartia sp., Pseudodiaptomus annandalei, Pseudodiaptomus serricaudatus, Euterpina acutifrons and Oithona brevicornis showed a corresponding spatial shift for their highest abundance and diversity from midstream during PRM to the downstream during the SWM/PSWM. Multivariate and IndVal analysis demarcated many indicator species of copepods of different hydrographical settings in the KBW. A comparison with the historical data set showed that there is an apparent long-term change in hydrography, copepod composition and community structure in the upstream of the KBW due to TB.
Źródło:
Oceanologia; 2021, 63, 1; 115-132
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of prey field variability on early cod larval survival: a sensitivity study of a Baltic cod Individual-based Model
Autorzy:
Schmidt, J.O.
Hinrichsen, H.-H.
Powiązania:
https://bibliotekanauki.pl/articles/48059.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Baltic Sea
individual-based model
calanoid copepod
Acartia
larva
Temora longicornis
predator-prey interaction
spatial variation
biophysical model
Centropages hamatus
cod
Pseudocalanus acuspes
Baltic cod
Opis:
Existing coupled biophysical models for Baltic larval cod drift, growth and survival use idealised constructed mean prey fields of nauplius distributions. These simulations revealed the best feeding conditions for Baltic cod larvae longer than 6 mm. For shorter, first feeding larvae (between 4.5 and 6 mm) pronounced differences in growth and survival were observed, which depend on food availability and to a lesser degree on ambient temperature. We performed runs with an Individual-based Model (IBM) for Baltic cod larvae in order to demonstrate how natural variability in prey abundance influences the survival success of first feeding larvae. In the Baltic, this larval stage lives mainly between 20 and 40 m depth and feeds exclusively on the nauplii of different calanoid copepods (Acartia spp., Pseudocalanus acuspes, Temora longicornis and Centropages hamatus). Prey data obtained from vertically stratified samples in the Bornholm Basin (Baltic Sea) in 2001 and 2002 indicate a strong variability at spatial and temporal scales. We calculated larval survival and growth in relation to natural variation of prey fields, i.e. species-specific nauplius abundance. The results of the model runs yielded larval survival rates from 60 to 100% if the mean size of nauplii species was taken and lower survival if prey consisted of early nauplius stages only.
Źródło:
Oceanologia; 2008, 50, 2; 205-220
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metazoan parasites of fish from the Lebsko Lagoon (Central Coast, Poland)
Pasożyty (Metazoa) ryb z jeziora Łebsko (wybrzeże środkowe, Polska)
Autorzy:
Morozinska-Gogol, J.
Powiązania:
https://bibliotekanauki.pl/articles/84988.pdf
Data publikacji:
2007
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
metazoan parasite
parasite
fish
Lebsko Lagoon
Polska
Digenea
Crustacea
metacercaria
Posthodiplostomum cuticola
Cyprinidae
prevalence
rudd
roach
Diplostomum
Tylodelphys clavata
copepod
Ergasilus sieboldi
Opis:
Throughout 3 years, a total of 721 various fish species, from the Łebsko Lagoon were examined. The most abundant groups of parasites were Digenea and Crustacea. Metacercariae of Posthodiplostomum cuticola (Nordmann, 1832) were found only in Cyprinidae (highest prevalence in rudd – 62.5%, and mean intensity in roach 12.71 indiv.). Metacercariae of Diplostomum spp. and Tylodelphys clavata (Nordmann, 1832), and also copepods Ergasilus sieboldi Nordmann, 1832 occurred in majority of examined fish species. The highest infection with Diplostomum spp. was noted in rudd (prev. 50.0%, int. 11.25 indiv.). T. clavata occurred with highest prevalence in pike (46.15%) and mean intensity amounted to 54.7 indiv. in perch. E. sieboldi was reported mostly from zander with typical for this fish Achtheres percarum (Nordmann, 1832) (prev. 75.0% and 92.86%; int. 6.0 indiv. and 10.92 indiv. respectively). Also nematode Anguillicola crassus (Kuwahara, Niimi and Hagaki, 1974) was noted with high prevalence 76.47% in eel. The remaining parasites species were noted less frequently.
W ciągu trzech lat (2000-2003) przebadano ryby z jeziora przymorskiego Łebsko. Łącznie zbadano 721 ryb z różnych gatunków. Stwierdzono obecność Monogenea, Digenea, Cestoda, Nematoda, Acanthocephala i Crustacea. Najliczniej występowały Digenea, które stanowiły prawie 78% zebranego materiału (Fig. 1). U ryb karpiowatych dominowały metacerkarie P. cuticola, lokujące się w tkance podskórnej, głównie u wzdręgi i płoci (odpowiednio 62,5% i 42%). Metacerkarie Diplostomum sp., T. clavata oraz skorupiaki E. sieboldi występowały u większości zbadanych gatunków ryb. Skorupiak Achtcheres percarum, znany z występowania u okonia i sandacza, w Łebsku został stwierdzony jedynie u sandacza. Pełne listy pasożytów wraz ze wskaźnikami zarażenia, zostaną przedstawione w kolejnych pracach, poświęconych poszczególnym gatunkom ryb.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2007, 11
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miocene cyclopid copepod from a saline paleolake in Mojave, California
Autorzy:
Holynska, M.
Leggitt, L.
Kotov, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/20781.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Miocene
cyclopid copepod
copepod
Copepoda
Cyclopidae
ontogenesis
biogeography
Barstow Formation
saline lake
paleontology
Mojave Desert
California
Opis:
There are remarkably few direct fossil records of Copepoda, which implies that current estimates of the lineage divergence times and inferences on the historical biogeography remain highly dubious for these small-sized crustaceans. The Cyclopidae, a predominantly freshwater copepod family with 1000+ species and distributed worldwide, has no fossil record at all. Recent collections from the middle Miocene Barstow Formation in Southern California resulted in ample material of finely preserved cyclopid fossils, including both adult and larval stages. To document the antennulary setation pattern in the adult and copepodid instars we used a coding system that is coherent between sexes and developmental stages. The majority of the cyclopid fossils, coming from saline lake environment, represent the modern genus Apocyclops, a euryhaline, thermophilic group occurring both in the New World and Old World. A new species Apocyclops californicus is described, based on the short medial spine and spiny ornamentation of the free segment of leg 5, spinule ornamentation of pediger 5, and well-developed protuberances of the intercoxal sclerite of leg 4. The presence of antennal allobasis and the features of the swimming legs unambiguously place the Miocene Apocyclops in the A. panamensis- clade, a predominantly amphi-Pacific group. The middle Miocene fossils with clear affinities to a subgroup of Apocyclops imply an early Miocene or Paleogene origin of the genus. Based on the geographic patterns of the species richness and morphology in Apocyclops and its presumed closest relative, genus Metacyclops, we hypothesize that: (i) the ancestor of Apocyclops, similar in morphology to some cave-dweller Metacyclops occurring today in the peri-Mediterranean region, might have arrived in North America from Europe via the Thulean North Atlantic bridge in the late Paleocene–early Eocene; (ii) Eocene termination of the Thulean land connection might have resulted in the divergence of Apocyclops from the Metacyclops stock.
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New record of Thecacineta calix (Ciliophora, Suctorea) from Florida coast, Gulf of Mexico
Autorzy:
Ingole, Baban
Chakraborty, Biswajit
Chatterjee, Tapas
Dovgal, Igor
Powiązania:
https://bibliotekanauki.pl/articles/1386357.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
Ciliate
Thecacineta calix
distribution
harpacticoid copepod
Florida
USA
orzęski
rozmieszczenie
widłonóg z rzędu Harpacticoida
Floryda
Opis:
The suctorian ciliate Thecacineta calix is reported off the coast of Panama, Florida (USA) epibiont on meiobenthic harpacticoid copepod. This is the first report of T. calix from Florida coast. The length of stalk in the present specimens, epibiont on harpacticoids, ranged from one seventh to one eighth of the lorica length.
Sysydlaczek Thecacineta calix został stwierdzony na wybrzeżu Florydy (USA) jako epibiont na widłonogu z rzędu Harpacticoida. Jest to pierwsze stwierdzenie tego gatunku na wybrzeżu Florydy. Długość nóżki u okazów epibiontów występujących na Herpacticoida, wahała się od jednej siódmej do jednej ósmej długości loriki.
Źródło:
Acta Biologica; 2020, 27; 143-147
2450-8330
2353-3013
Pojawia się w:
Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical studies of the influence of food ingestion on phytoplankton and zooplankton biomasses
Autorzy:
Dzierzbicka-Glowacka, L.
Powiązania:
https://bibliotekanauki.pl/articles/47575.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
biomass
nutrient
zooplankton
food ingestion
phytoplankton
mathematical model
marine ecosystem
herbivorous copepod
Opis:
This paper presents the numerical simulations of the influence of food ingestion by a herbivorous copepod on phytoplankton and zooplankton biomasses (PZB) in the sea. The numerical studies were carried out using the phytoplankton- -zooplankton-nutrient-detritus PhyZooNuDe biological upperla yer model. This takes account both of fully developed primary production and regeneration mechanisms and of daily migration of zooplankton. In this model the zooplankton is treated not as a ‘biomass’ but as organisms having definite patterns of growth, reproduction and mortality.
Źródło:
Oceanologia; 2002, 44, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parameterisation of a population model for Acartia spp. in the Southern Baltic Sea. Part 2. Egg production
Autorzy:
Dzierzbicka-Glowacka, L.
Lemieszek, A.
Zmijewska, M.I.
Powiązania:
https://bibliotekanauki.pl/articles/48730.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
environment condition
Baltic Sea
Gdansk Deep
Acartia
population model
copepod
egg production
Opis:
The paper describes the modelling ofeg g production in Acartia spp. under changing environmental conditions in the southern Baltic Sea (Gdańsk Deep). The hypothesis (Sekiguchi et al. 1980) that the food-saturated rate of egg matter production is equivalent to specific growth rate ofco pepods is applied. The average number ofeggs produced per day by one Acartia female is obtained as a function ofg rowth rate, i.e. by multiplying exp gN3 − 1 from the growth rate of the nauplius stage equation by Wfemale/Wegg. The copepod model, reduced to a zerodimensional population model calibrated for Acartia spp. under the environmental conditions typical ofthe southern Baltic Sea, was used to determine the effects of temperature and food concentration on the growth rate ofeac h oft he model stages (see Part 1 – Dzierzbicka-Głowacka et al. 2009 – this issue). In this part, egg production as a function of the above parameters is evaluated. The rate of reproduction during the seasons in the upper layer ofthe Gdańsk Deep is also determined.
Źródło:
Oceanologia; 2009, 51, 2; 185-201
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Report of Trematosoma rotunda (Ciliophora, Suctorea) as epibiont on harpacticoid copepod from western Indian coast
Autorzy:
Chatterjee, Tapas
Dovgal, Igor
Jadhav, Mahesh
Nanajkar, Mandar
Powiązania:
https://bibliotekanauki.pl/articles/1386388.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
epibiont ciliate
copepod
India
Arabian Sea
epibiontyczne orzęski
oczliki
Indie
Morze Arabskie
Opis:
Suctorian ciliate Trematosoma rotunda (Allgén, 1952) is reported here for the first time as epibiont on a harpacticoid copepod collected from Mandovi river estuarine mouth, Goa, west coast of India, Arabian Sea. The description of the species, synonymy, data on species distribution and host taxa are also presented in this study.
Po raz pierwszy odnotowano gatunek orzęska Trematosoma rotunda (Allgén, 1952) jako epibionta na Herpacticoida zebranym z ujścia rzeki Mandovi, Goa, zachodnie wybrzeże Indii, Morze Arabskie. W pracy przedstawiono opis gatunku, synonimizację oraz dane dotyczące rozmieszczenia gatunków i taksonów żywicieli.
Źródło:
Acta Biologica; 2020, 27; 109-116
2450-8330
2353-3013
Pojawia się w:
Acta Biologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seasonal composition and population density of zooplankton in Lake Timsah, Suez Canal, Egypt
Autorzy:
El-Sherbiny, M.M.
Al-Aidaroos, A.M.
Gab-Alla, A.
Powiązania:
https://bibliotekanauki.pl/articles/47480.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
cladoceran
composition
copepod
dissolved oxygen
diversity
Egypt
Lake Timsah
mollusc
physicochemical condition
population density
rotifer
salinity
Suez Canal
zooplankton
Opis:
Zooplankton composition and abundance were investigated seasonally at ten sites in Lake Timsah and the adjacent, connected western lagoon in relation to the physicochemical conditions. A total of 42 taxa (including larval stages) were identified, among them 21 species of copepods, 6 rotifers, 5 cladocerans, 1 chaetognath and 1 urochordate. Copepods represented the predominant component (77.7% of the total community), followed by rotifers, molluscs, cladocerans and (9.2, 4.7 and 3.9% respectively), while other groups collectively formed about 4.5% of the total zooplankton population. Summer was the most productive season with an average count of 40 864 individuals m−3. The dominant copepod species were Paracalanus crassirostris and Oithona nana representing 28.3 and 24.3% of the total zooplankton respectively. The total zooplankton count, including copepods, and its dominant species showed significant positive correlations with temperature, pH and total phytoplankton density. However, negative correlations were detected between densities of rotifers, and salinity and dissolved oxygen.
Źródło:
Oceanologia; 2011, 53, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
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