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Parasites communities in the clingfish Gobiesox marmoratus from Central Chile

100%

Munoz G.

Acta Parasitologica

2014

tom 59

nr 1

This study investigated the factors (i.e., season, locality, sampling year, total length and maturity stage of the hosts) that might influence the structure of parasite populations and communities in the clingfish Gobiesox marmoratus. The parasite community was described and analyzed using numerical descriptors, such as prevalence, intensity and species richness, between factors previously mentioned. A total of 260 clingfish were collected from 2 localities of central Chile, four seasons and during 3 year cycles (from July 2006 to July 2009). In the whole clingfish sample, 668 parasites were found, which belonged to 14 parasite taxa; 9 of them were new records in G. marmoratus. Parasite infracommunity richness ranged 0–3 species, although 1 trematode species, Helicometrina nimia, represented 80% of all parasites collected and was the most abundant and prevalent parasite species. The average of parasite abundance and intensity (± SD) was 2.5 ± 8.2 and 7.5 ± 12.7, respectively. Generalized linear model showed that parasite communities were influenced by season, locality, sampling year, and maturity stage when considering the abundance and intensity of parasites. For the parasite richness, only the locality and maturity of fish was determinant for explaining the differences. The populations and communities of the parasite variations were variable due to differences in fish body length because prevalence, abundance and intensity of parasites significantly correlated with the fish body length. Concordantly, maturity fish were longer than immature fish. Thus, clingfish from El Tabo were longest and mature, which harbored higher parasite richness than those fish from Las Cruces.

Source and significance of genetic polymorphism of selected parasitic Protozoa

80%

Majewska A. C. , Sulima P.

Wiadomości Parazytologiczne

1998

tom 44

nr 3

Survey of plant-parasitic nematodes associated with yams in Ogun and Osum States of Nigeria

70%

Adegbite A. A. , Saka J. O. , Agbaje G. O. , Osuloye F. O.

Journal of Plant Protection Research

2008

tom 48

nr 4

421-428

A survey was conducted to determine the types, frequency and population of plant parasitic nematodes associated with the soils and roots of Yam (Dioscorea species) in all the Local Government Areas of Ogun and Osun States of Nigeria using random sampling soil and root and pie pan modification of Baerman funnel for plant parasitic nematode extraction. Ten and nine genera of plant parasitic nematodes were encountered both from the soils and root samples from the two States. Plant parasitic nematodes recovered included Scutellonema spp., Meloidogyne spp., Pratylenchus spp., Trichodorus spp., Helicotylenchus spp., Radopholus spp., Longidorus spp., Xiphinema spp., Rotylenchulus spp and Aphelenchoides species. Scutellonema spp., Meloidogyne spp., and Pratylenchus spp were most widely distributed with frequency ratings of 70, 65 and 60% respectively in soil samples from Ogun State and in the root samples the three genera predominated with 60, 55 and 45% frequency ratings respectively. Meloidogyne spp., Scutellonema spp., and Pratylenchus spp were most widely distributed with frequency ratings of 65, 45 and 35% respectively in soil samples from Osun State and in the root samples the three genera predominated with 55, 35 and 35% frequency ratings respectively.

W celu określenia występowania typów, częstotliwości występowania oraz populacji pasożytniczych dla roślin nicieni związanych z glebą i korzeniami słodkiego ziemianka (gatunku Dioscorea) przeprowadzono lustrację wszystkich państwowych lokalizacji w stanach Ogun i Osun, przy wykorzystaniu zmodyfikowanej metody polegającej na użyciu lejka Baermana. W próbkach ziemi i korzeni pochodzących z tych stanów wykryto odpowiednio dziesięć i dziewięć najczęściej spotykanych rodzajów nicieni. Były to gatunki: Scutellonema spp., Meloidogyne spp., Pratylenchus spp., Trichodorus spp., Helicotylenchus spp., Radopholus spp., Longidorus spp., Xiphinema spp., Rotylenchulus spp., i Aphelenchoides spp., Scutellonema spp., Meloidogyne spp., i Pratylenchus spp należały do najpospoliciej spotykanych, a częstotliwośc ich występowania w próbach ziemi wynosiła odpowiednio 70, 65 i 60% ze stanu Ogun, natomiast w próbach korzeni znajdowano je w ilości 60, 55 i 45%. W stanie Osun w ziemi najczęściej stwierdzano gatunki Meloidogyne - 65%, Scutellonema - 45% i Pratylenchus - 35%. Natomiast w próbach korzeni częstotliwość ich występowania wynosiła odpowiednio 55, 35 i 35%.