EFFECTS OF FEEDING OF CHONDRUS CRISPUS (IRISH MOSS) DURING THE GRAZING SEASON ON THE CONDITION AND FERTILITY OF SHROPSHIRE EWES

1979 ◽  
Vol 59 (1) ◽  
pp. 95-100
Author(s):  
D. BREWER ◽  
J. McLACHLAN ◽  
A. C. NEISH ◽  
A. TAYLOR ◽  
T. M. MacINTYRE
Keyword(s):  
Chondrus Crispus ◽  
Grazing Season ◽  
Irish Moss ◽  
Weight Gains ◽  
Dose Levels

Shropshire ewes grazing permanent pastures were dosed once weekly with Chondrus crispus (Irish Moss) from May to September or October during the years 1973 to 1977. The seaweed was fed at 250 g wet wt/wk/ewe by oesophageal tube. At these dose levels, C. crispus is not chronically toxic to grazing ewes. Both fertility and post-lactation weight gains of the C. crispus-dosed ewes on pasture were enhanced as compared to the control flock. By contrast, the performance of female lambs from the C. crispus-dosed ewes was indistinguishable from that of female lambs from the control flock.

scholarly journals The unique giant Irish moss (Chondrus crispus) from Basin Head: health assessment in relation to reference sites on Prince Edward Island

Botany ◽  
2018 ◽  
Vol 96 (11) ◽  
pp. 805-811 ◽  
Author(s):  
Paula Tummon Flynn ◽  
David Garbary ◽  
Irene Novaczek ◽  
Anthony Miller ◽  
Pedro A. Quijón
Keyword(s):  
Prince Edward Island ◽  
Health Assessment ◽  
Pulse Amplitude ◽  
Chondrus Crispus ◽  
Single Location ◽  
Irish Moss ◽  
Yield Values ◽  
The Common ◽  
Unique Strain ◽  
Resorcinol Method

Irish moss (Chondrus crispus Stackhouse) is a red alga that is common in Atlantic Canada. A unique strain of this species, the giant Irish moss, grows in a single location and is under strict protection. Unlike the common coastal form, the giant Irish moss reproduces solely by fragmentation and is found in gametophyte form. A 99.9% decline in giant Irish moss abundance (1999–2012) prompted this study to address two questions: whether the giant Irish moss remains 100% vegetative and gametophytic, and whether such decline is related to factors leading to a reduction in photosynthetic health. Six populations of the common Irish moss strain were compared with two populations of giant Irish moss, and their life history phases determined using a resorcinol method. The common Irish moss populations exhibited a 65%–86% ratio of gametophytic:tetrasporophytic fronds, while both giant strain populations were 100% gametophytic. Photosynthetic efficiency was measured with Pulse-Amplitude-Modulation (PAM) fluorometry and neither giant moss population had significantly different quantum yield values from the littoral populations. Hence, these analyses provided no evidence of giant Irish moss being exposed to particular sources of stress linked to water or habitat quality and alternative factors explaining the decline of this unique strain are proposed.

Potential utilization of a lambda carrageenan polysaccharide, derived from a cultivated, clonal strain of the red seaweed Chondrus crispus (Irish moss) against toxic actions of venom of Bothrops jararaca and B. jararacussu snakes

2020 ◽  
Vol 32 (6) ◽  
pp. 4309-4320
Author(s):  
Ana Cláudia Rodrigues da Silva ◽  
Kelly Ketely Granja Pereira ◽  
Alan Trevor Critchley ◽  
Eladio Flores Sanchez ◽  
André Lopes Fuly
Keyword(s):  
Red Seaweed ◽  
Chondrus Crispus ◽  
Clonal Strain ◽  
Bothrops Jararaca ◽  
Irish Moss

EFFECT OF PROCESSING AND STORAGE ON THE QUALITY OF GELOSE FROM IRISH MOSS (CHONDRUS CRISPUS)

1948 ◽  
Vol 26f (3) ◽  
pp. 160-167
Author(s):  
D. MacDougall
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
East Coast ◽  
Storage Temperature ◽  
Chondrus Crispus ◽  
Irish Moss ◽  
Optimum Ph ◽  
Processing And Storage ◽  
And Storage

Irish moss (Chondrus crispus) from Canada's east coast was used to study possible improvements in the production and storage of gelose. The optimum pH for the extraction of gelose from Irish moss was between 6 and 7. Fine leaf particles, which prevent rapid filtration, were readily removed by supercentrifuging. Comparison of drum drying and drying from the frozen state showed that the former caused a marked lowering of viscosity but had little effect on suspending power or jelly strength. The logarithm of the viscosity determined by means of a MacMichael viscosimeter was related directly to the concentration; therefore, viscosity measurements can be corrected for the moisture content of the samples. The effect of storage temperature on deterioration was greater than the effect of relative humidity. Samples stored at 0° and 40° F. for 12 weeks showed no significant changes in viscosity or suspending power, whereas those stored at 80° and 120° F. deteriorated very rapidly. Material was vacuum ice-dried to 2% moisture without damage but the quality decreased when the extracts were stored at high temperatures.

Productivity of S. 59 red fescue with and without S. 184 white clover under hill conditions: 1. Animal performance

1975 ◽  
Vol 84 (2) ◽  
pp. 265-272 ◽  
Author(s):  
D. A. Davies
Keyword(s):  
White Clover ◽  
Growth Rates ◽  
Live Weight ◽  
Early Spring ◽  
Individual Growth ◽  
Grazing Season ◽  
Red Fescue ◽  
Significant Difference ◽  
Weight Gains ◽  
Second Year

SUMMARYAn appraisal of the value of S. 59 red fescue (Festuca rubra L.) for grazing was made using ewes and lambs (Clun Forest in 1969, Welsh Mountain in 1970) at a site 305 m O.D. in mid-Wales. S. 23 perennial ryegrass (Lolium perenne L.) was used as a control, and the value of S. 184 white clover (Trifolium repens L.) in conjunction with both grasses was examined.In the first year, under a rotational grazing regime at a fixed stocking rate of 22 ewes and single lambs/ha, lamb live-weight gains were significantly poorer on S. 59/S. 184 and significantly better on S. 23/S. 184 than on either of the pure grass swards. For the 130 days grazing season, mean daily lamb live-weight gains were 157, 126, 78 and 120 g on S. 23/S. 184, S. 23, S. 59/S. 184 and S. 59 treatments respectively.During the second year lamb growth rates on S. 59/S. 184 improved by 59%, whereas those on the other treatments were marginally lower than in 1969. Stocking rates were increased on the grass swards and decreased on the grass/clover swards for most of the grazing period in the second year in accordance with herbage availability. No significant difference was detected between the four treatments in total lamb liveweight production as a result of better individual growth rates on the grass/clover swards.In both years wide variations were recorded between treatments at different periods within the grazing season. Red fescue swards maintained superior lamb production in early spring and late autumn, but were inferior to ryegrass in mid-summer.

Ostertagiasis in calves. I. The effect of control measures on infection levels and body weight gains during the grazing season in Denmark

1976 ◽  
Vol 2 (3) ◽  
pp. 259-272 ◽  
Author(s):  
SV AA Henriksen ◽  
R.J. Jørgensen ◽  
P. Nansen ◽  
KR Sejrsen ◽  
J. Brolund Larsen ◽  
...  
Keyword(s):  
Body Weight ◽  
Control Measures ◽  
Grazing Season ◽  
Weight Gains

Fishing and catch characteristics of an eastern Canadian Irish moss (Chondrus crispus Stackh.) dragraker

Hydrobiologia ◽  
1987 ◽  
Vol 151-152 (1) ◽  
pp. 341-347
Author(s):  
J. D. Pringle ◽  
D. J. Jones ◽  
R. E. Semple
Keyword(s):  
Chondrus Crispus ◽  
Irish Moss

Outplant Method for Phenological Studies of Chondrus crispus in Mechanically Harvested Beds

1978 ◽  
Vol 35 (3) ◽  
pp. 336-338 ◽  
Author(s):  
L. A. Hanic ◽  
J. D. Pringle
Keyword(s):  
Key Words ◽  
Field Conditions ◽  
Chondrus Crispus ◽  
Irish Moss ◽  
Long Term Studies

A method is described employing a primary pottery unit for seeding and growing Chondrus crispus Stackhouse and a secondary concrete platform for support and protection. The combined units facilitate long-term studies where frequent removal of plants for observation is required and where field conditions are adverse. Key words: Chondrus crispus, Irish moss, seeding, outplanting method

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