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Start Over Coverage 53-58

2. Larval development of Onchocamallanus bagarii (Nematoda: Camallanidae) in copepods

Creator:
De, Nimai C. and Maity, Rabindra N.
Format:
print
Type:
model:internalpart and TEXT
Subject:
Nematoda, Onchocamallanus, Copepoda, Mesocyclops, and development
Language:
English
Description:
Larval development of the nematode Onchocamallanus bagarii (Karve et Naik, 1951), recovered from the intestine of the fish Bagarius bagarius (Hamilton) was studied under laboratory conditions. The cyclopoid copepods Mesocyclops leuckarti (Claus) and M. crassus (Fischer) were infected with first-stage larvae from female uteri and maintained at temperatures 29-30°C. After being swallowed by the copepods, first-stage larvae burrow through the intestinal wall and reach the haemocoel of the copepods and there they grow and moult twice to attain the third and infective-stage. First-stage larvae become ensheathed after 65 hours of infection and second-stage larvae first appeared on day 3 post infection (p.i.). The second moult occurred on day 5 p.i. The larval stages occurring during development are described.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Photosynthesis and carbon import in developing leaves of groundnut (Arachis hypogaea L.)

Creator:
Ram, Sewa, Sharma, Aruna, and Sengupta, U.K.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
Rates of the net photosynthetic CO2 uptake the import of '“♦C-labelled assimilates in developing groundnut leaves on the 5"’, 9‘*' and I6"i positions from the stem base were followed over a 20 d maturation period. Maximum import of labelled assimilates into the leaf was observed on the 2"^ day after leaf emergence, when the developing leaf had attained 10-12 % of its fmal leaf area (% Aj). Thereafter, by the day the •‘^C-import rate declined rapidly and asymptotically to a near zero value. The rapid decline in import was offset by a rapid rise in /’n. Pjsj was first observed at 20-30 % Af. Maximum values were attained by the 6‘*’ day, irrespective of leaf area attained by the developing leaves, and were maintained up to the end of the experiment.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Senescence retarding effect of metal ions: Pigment and protein contents and photochemical activities of detached primary leaves of wheat

Creator:
Subhan, D. and Murthy, S. D. S.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
aluminium, carotenoids, chlorophyll, DCMU, electron transport, fluorescence, emission spectra, leaf senescence, magnesium, and potassium
Language:
Multiple languages
Description:
Al3+ significantly delayed the loss of chlorophyll (Chl), protein, and carotenoids when compared to K+ and Mg2+ during dark-induced senescence of detached primary leaves of Triticum aestivum. Thylakoid membranes isolated from Al3+ - treated leaves showed a better retention of photosystem (PS) 2, PS1, and whole chain electron transport activities than thylakoids of K+- or Mg2+-treated leaves. These ions protected the electron transport activities and restored the DCMU-dependent fluorescence increase of thylakoid membranes in a valency-dependent manner. Al3+ also delayed the change of excitation energy distribution during senescence. and D. Subhan, S. D. S. Murthy.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

6. The microecology of dactylogyrids (Monogenea: Dactylogyridae) on the gills of wild spotted rose snapper Lutjanus guttatus (Lutjanidae) from Mazatlan Bay, Mexico

Creator:
Soler-Jiménez, Lilia C. and Fajer-Ávila, Emma J.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
microhabitat, distribution, Pacific coast, Euryhaliotrema perezponcei, Euryhaliotrematoides sp., Haliotrematoides spinatus, Haliotrematoides plectridium, and Haliotrematoides guttati
Language:
English
Description:
The spatial distribution and coexistence of monogenean dactylogyrids was assessed on the gills of 63 specimens of wild spotted rose snapper, Lutjanus guttatus (Steindachner), caught in the Mazatlan Bay, Sinaloa, Mexico. Five species are reported: Euryhaliotrema perezponcei García-Vargas, Fajer-Ávila et Lamothe-Argumedo, 2008, Euryhaliotrematoides sp., Haliotrematoides spinatus Kritsky et Mendoza-Franco, 2009, H. plectridium Kritsky et Mendoza-Franco, 2009, and H. guttati García-Vargas, Fajer-Ávila et Lamothe-Argumedo, 2008. All except E. perezponcei and H. guttati represent new geographical records for the Pacific coast. The most prevalent dactylogyrid species was E. perezponcei (100%), H. plectridium and H. spinatus had >80% prevalence, and H. guttati and Euryhaliotrematoides sp. had the lowest prevalence. The mean abundance of H. plectridium and E. perezponcei was close to 60 parasites/fish, whereas Euryhaliotrematoides sp. and H. guttati had the lowest abundance. The dactylogyrid species exhibited a tendency for attachment to gill arch 2: 25% attachment occurring on gill arch 1, 30% on 2, 27% on 3 and 18% on 4, and showed a significant preference for the central sector of the gill (42%). Haliotrematoides plectridium had a preference for attachment to gill arches 2 and 3 and the central sector. Haliotrematoides spinatus tended to settle on the gill arches 2 and 3 and had a preference for the central sector. Euryhaliotrema perezponcei tended to settle on the gill arches 1 and 2 and the anterior gill sector. Euryhaliotrematoides sp. and H. guttati did not show a preference for any gill arch or sector. The intraspecific aggregation was stronger than the interspecific aggregation, indicating that all the dactylogyrid species on spotted rose snapper were aggregated, and there was no evidence of competition among the species.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public