Comparative Studies on the Ecology of Asterina Gibbosa and A. Phylactica at Lough Ine

1984 ◽  
Vol 64 (1) ◽  
pp. 35-53 ◽  
Author(s):  
R. H. Emson ◽  
R. G. Crump
Keyword(s):  
Comparative Studies ◽  
Habitat Preferences ◽  
Wave Exposure ◽  
Ecological Separation

The distributions of Asterina gibbosa and A. phylactica in the Lough Ine area are described and compared. The species are shown to have different horizontal distributions with respect to wave exposure. Clear ecological separation is demonstrated where their distributions overlap as a result of micro-habitat preferences.

scholarly journals Space partitioning among damselfishes in the Caribbean coast of Panama: the role of habitat preferences

2012 ◽  
Vol 10 (3) ◽  
pp. 633-642 ◽  
Author(s):  
Laís de Carvalho Teixeira Chaves ◽  
Carlos Gustavo A Ormond ◽  
Elizabeth S. McGinty ◽  
Beatrice Padovani Ferreira
Keyword(s):  
Benthic Communities ◽  
Habitat Preferences ◽  
Fold Increase ◽  
Abundant Species ◽  
Wave Exposure ◽  
Habitat Specialization ◽  
Caribbean Region ◽  
Space Partitioning ◽  
Distributional Patterns ◽  
The Caribbean

This study aimed to assess abundance and habitat use by juvenile and adult damselfishes, as much as the benthic cover of different reefs on Isla Colon, Bocas del Toro, Panama. Reefs were selected considering different levels of wave exposure and depths. Damselfish and benthic communities were distinct between reefs. The most abundant species in the sheltered deeper reef was Stegastes planifrons followed by S. leucostictus, and they were also recorded in the sheltered shallower reef. Low densities of S. partitus and S. variabilis were also observed in the sheltered deeper reef, as these species are apparently restricted to higher depths. Additionally, these reefs presented patches with high cover of live and dead massive coral. Shallow depths presented high abundances of S. adustus, indicating a preference of this species for shallow habitats and exhibiting a two-fold increase in abundance at higher wave surge. Also, Microspathodon chrysurus reached higher numbers in shallow depths. Furthermore, the exposed reef presented a high cover (%) of algae groups and the fire-coral Millepora alcicornis, acknowledged as a preferred habitat for M. chrysurus and other reef fish. In this study, distinct habitat uses were observed, with patterns regulated by depth and/or wave exposure levels and/or availability of specific benthic cover. For site-attached species as damselfish, habitat specialization, competition and/or non-random recruitment patterns have been found to rule distributional patterns. Similar results for damselfish relative abundances were found compared to studies conducted within Panama and other reefs throughout the Caribbean region over three decades ago, indicating strong habitat affinity for the most abundant species. However, severe reductions of habitat availability following coral mass-mortality events may have disrupted their distributional patterns.

Further Comparative Studies on Ascites in Liver and Heart Disease

1950 ◽  
Vol 16 (1) ◽  
pp. 91-103 ◽  
Author(s):  
John A. Layne ◽  
F.R. Schemm ◽  
W.W. Hurst
Keyword(s):  
Heart Disease ◽  
Comparative Studies

A Reply to Kuder's Criticism of SVIB-KOIS Comparative Studies

1972 ◽  
Vol 5 (1) ◽  
pp. 306-309
Author(s):  
Arthur J. O'Shea ◽  
Mervin D. Lynch ◽  
Thomas F. Harrington
Keyword(s):  
Comparative Studies

The Use of Radioiodinated Congo Red in the Study of Amyloidosis

1963 ◽  
Vol 03 (01) ◽  
pp. 25-38
Author(s):  
Manuel Tubis ◽  
William Blahd ◽  
John Endow
Keyword(s):  
Rheumatoid Arthritis ◽  
Multiple Myeloma ◽  
Comparative Studies ◽  
Congo Red ◽  
Half Time ◽  
Positive Correlation ◽  
Autopsy Findings ◽  
Percentage Removal

SummaryA study of the removal of I131-labeled Congo red from the blood of amyloid, non-amyloid, multiple myeloma, rheumatoid arthritis and other patients is presented. The percentage removal of the labeled dye shows the same variation reported by many other workers using Bennhold’s test and its modifications.However, there seems to be a positive correlation between the percentage removal of the labeled dye and the presence of amyloid as revealed by biopsy and autopsy. The half-time of disappearance is also correlated with the amyloidosis.The availability of the I131-labeled dye permits the use of very small weights of the dye thereby drastically reducing the possibility of toxic and sometimes fatal reactions encountered with the unlabeled dye. The I131 present permits easy quantitation of the dye in the blood without separation of plasma and obviates the need of fasting. It also permits external counting and scanning of deposits in the organs containing the dye.The availability and use of the labeled dye may stimulate more comparative studies of the removal of the dye from the blood correlated with biopsy and autopsy findings.

The Importance of Comparative Studies

1977 ◽  
Vol 38 (02) ◽  
pp. 0395-0398 ◽  
Author(s):  
Christine Hawkey
Keyword(s):  
Comparative Studies
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