Benefit of dietary seaweed (Ascophyllum nodosum) extract in reducing heat strain and fescue toxicosis: a comparative evaluation

Spiers, Donald E.; Eichen, P. A.; Leonard, M. J.; Wax, Laura E.; Rottinghaus, George E.; Williams, J. E.; Colling, D. P.

doi:10.1016/j.jtherbio.2004.08.059

Cited by 24 publications

(18 citation statements)

References 9 publications

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“…Treatment with the same strain of microalga in cows (26) and a brown alga (Ascophyllum nodosum) in steers (12) showed a reduction in feed intake under heat stress. On the other hand, Spiers et al (12) speculated that the algae might influence metabolic heat production by decreasing intake. The reasons for the discrepancies between the present case and the others are not clear but differences in type of algae and the diet or inclusion rate are a potential explanation.…”

Section: Discussionmentioning

confidence: 95%

“…The addition of microalgae did not affect skin temperature or respiration rate (P > 0.05). However, in a number of similar studies on lambs, core body temperature was decreased by supplementing different algae products during heat stress (12,15,16). In the current study, without influencing the intake, the microalga Schizochytrium limacinum enhanced final mean body weights and daily weight gain by 1.64% and 29.3%, respectively (Table 3).…”

Section: Discussionmentioning

confidence: 99%

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Influence of supplementing diet with microalgae (Schizochytrium limacinum)on growth and metabolism in lambs during the summer

Sucu¹,

Udum²,

Güneş³

et al. 2017

Turk J Vet Anim Sci

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Influence of supplementing diet with microalgae (Schizochytrium limacinum)on growth and metabolism in lambs during the summer

Sucu¹,

Udum²,

Güneş³

et al. 2017

Turk J Vet Anim Sci

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“…Ascophyllum nodosum is processed in a meal form from brown seaweed and marketed as Tasco (Acadian Seaplants Limited, Dartmouth, Nova Scotia, Canada). Previous work (Spiers et al, 2004;Williams et al, 2009) showed that Tasco-14 fed at 1% of diet DM had a short-term effect in reducing T core of beef steers exposed to heat stress. With limited studies conducted with dairy cows, the objective was to evaluate the ability of Tasco to alleviate the effects of heat stress under fluctuating ambient temperature (T a ) and humidity conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Several approaches have been used to alleviate heat stress in dairy cows, including management and feeding strategies. Although no feed additives have effectively reduced heat stress, some evidence exists that brown seaweed (Ascophyllum nodosum) may decrease core body temperature (T core ) for the short term (Spiers et al, 2004;Archer et al, 2007) and improve immune function during heat stress, without affecting performance (Allen et al, 2001;Fike et al, 2001;Saker et al, 2001). Ascophyllum nodosum is processed in a meal form from brown seaweed and marketed as Tasco (Acadian Seaplants Limited, Dartmouth, Nova Scotia, Canada).…”

Section: Introductionmentioning

confidence: 99%

Effect of Ascophyllum nodosum on alleviation of heat stress in dairy cows

Pompeu

Williams

Spiers

et al. 2011

The Professional Animal Scientist

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on alleviation of heat stress in dairy cows. Thirty-two cows were randomly assigned (randomized complete block design) to 4 treatments: control-1 (C-1); control for period 2 and 0.50% Tasco for period 3 (C-.5T); 0.25% Tasco (0.25T); 0.50% Tasco (0.5T). The study was divided into 3 periods: period 1 (7 d; adaptation to Calan Gate system); period 2 [28 d; C-1 and C-.5T representing the control (CON)]; period 3 (28 d; C-.5T was changed to 0.50% Tasco to evaluate duration of feeding Tasco and other groups remained unchanged). Respiration rate and rump and ear skin temperatures were measured at 0700, 1600, and 1900 h. Core body temperature was recorded every 20 min with telemetric temperature transmitters in the reticulum. Tasco had no effect (P > 0.10) on milk production, but DMI was occasionally less (P < 0.05) for 0.25T cows than for CON cows in period 2. The rump skin temperature of 0.25T cows was reduced (P < 0.05) for some hours in period 2 and for some days in period 3. Linear regression of core body temperature and rump skin temperature versus ambient temperature in period 3 revealed less (P < 0.05) increase for 0.25T than for the control as ambient temperature increased. These results suggest that inclusion of 0.25% Tasco reduced body temperature response to increasing ambient temperature and sustained milk production, even with reduced DMI. No benefit of 0.50% Tasco was seen when fed for 28 or 56 d. Limited benefits of Tasco were observed in this study.

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“…In no case did the level of administered seed exceed 20% of the diet. in earlier whole-seed diets that produced hyperthermia (5 μg EV • kg -1 BW • d -1 , Al-Haidary et al, 2001;9 μg EV • kg -1 BW • d -1 , Burke et al, 2001; 10 μg EV • kg -1 BW • d -1 , Spiers et al, 2004) and a reduction in FI (Burke et al, 2001). However, the 40 μg EV • kg -1 BW • d -1 used in the present study was also administered as whole seed in a recent study (Scharf et al, 2012).…”

Section: Treatmentsmentioning

confidence: 99%

Use of different levels of ground endophyte-infected tall fescue seed during heat stress to separate characteristics of fescue toxicosis1

Spiers

Wax

Eichen

et al. 2012

Journal of Animal Science

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Studies of fescue toxicosis using whole seed diets show reduced feed intake and thermoregulatory ability, but much of the seed passes undigested through the animal. Cattle were fed ground tall fescue seed at different levels to potentially facilitate digestion and absorption of toxins and identify toxin sensitivity for major characteristics of the condition [i.e., hyperthermia, reduced feed intake (FI), reduced blood prolactin]. Steers (n = 18; 350 kg BW) were housed in the Brody Climatology Laboratory at thermoneutrality (TN; 19°C) and randomly assigned to daily diet treatments with either ground endophyte-infected [E+; low and high doses at 20 and 40 μg ergovaline/(kg BW/d), respectively] or endophyte-free [E-; control at 0 μg ergovaline/(kg BW/d)] tall fescue seed. After 12 d at TN, animals received 2 d of transition to heat stress (HS; 36°C daytime, 25°C nighttime) and maintained for 14 more days. Cattle were fed twice daily at 0800 and 1600 h, with water ad libitum. Feed intake was measured at 0700 h, with skin and rectal temperatures, and respiration rate at 0600, 1100, 1600, and 2100 h. Blood was sampled on selected days for prolactin and leptin determinations. Steers fed ground E+ diet decreased (P ≤ 0.0001) FI below controls at TN, with no dose effect. Maximum FI reduction with E+ treatment was 25% at TN, with an additional 46% decrease during HS (P ≤ 0.05). By the end of HS, E+ FI increased (P > 0.05) to that of E-, suggesting recovery. Prolactin was reduced (P ≤ 0.05) in high E+ cattle below controls at study end. Leptin blood concentrations were unaffected by E+ treatment (P > 0.05) but was reduced (P ≤ 0.05) by the end of HS. Pattern of rectal temperature response to HS showed a more rapid initial increase and decline for both E+ groups compared with controls (P ≤ 0.05). Skin temperature was the only variable that identified E+ dose differences. Although there were no treatment differences at TN, skin temperature was lower (P ≤ 0.05) for high E+ steers compared with controls during HS when air temperature was reduced each day. In general, FI was more responsive to E+ toxins than body temperature or blood prolactin, declining even at TN and exhibiting dynamic activity during HS. Although body temperature response to E+ toxins appears to stabilize during HS, this is misleading as rapid change in air temperature exposes effects on skin temperature.

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Benefit of dietary seaweed (Ascophyllum nodosum) extract in reducing heat strain and fescue toxicosis: a comparative evaluation

Cited by 24 publications

References 9 publications

Influence of supplementing diet with microalgae (Schizochytrium limacinum)on growth and metabolism in lambs during the summer

Influence of supplementing diet with microalgae (Schizochytrium limacinum)on growth and metabolism in lambs during the summer

Effect of Ascophyllum nodosum on alleviation of heat stress in dairy cows

Use of different levels of ground endophyte-infected tall fescue seed during heat stress to separate characteristics of fescue toxicosis1

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