Effect of thyroid hormones on activity dynamics of enzymes of intestinal mucosa of juvenile roach Rutilus rutilus

Кузьмина, В. В.; Левин, Б. А.; Vei, Lyu; Rusanova, P. V.

doi:10.1134/s003294521005005x

Cited by 6 publications

(8 citation statements)

References 14 publications

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“…Inhibition of function of thyroid glands by thiourea treatment led to distinguishable retardation of growth rate and developmental rate in both species (Fig. 1, Kuz’mina et al., 2010).…”

Section: Discussionmentioning

confidence: 89%

“…Addition of exogenous triiodothyronine induced slight retardation of growth rate, but accelerated developmental rate. A possible cause for slower growth in TH‐treated fish is a higher metabolic activity estimated by enzyme activity for the common roach (Kuz’mina et al., 2010). Inhibition of function of thyroid glands by thiourea treatment led to distinguishable retardation of growth rate and developmental rate in both species (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Body size determines the number of scales in cyprinid fishes as inferred from hormonal manipulation of developmental rate

Левин

Bolotovskiy

Levina

2012

Journal of Applied Ichthyology

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Summary In experiment with hormonal manipulation of developmental rate (alteration of thyroid status) of two cyprinid species, Abramis brama and Rutilus rutilus, we found that number of scales strongly correlates with body size at the moment of first scale appearance. If squamation development starts earlier and at a shorter body length, it results in reduction of scale numbers. If squamation development starts later and at a larger body length, the number of scales is increased. Calculated distances between scales at the moment of their appearance are the same in the different experimental groups despite of acceleration or retardation of developmental rate and a corresponding change in the number of scales (decreasing and increasing). It suggests that size of body at the moment of scale initiation determines the number of scales. Induced heterochrony in initiation of squamation is one of the mechanisms, which is evidently responsible for intraspecies variability in scale numbers and might be considered a relevant reason for differences between close‐related species in case of evolutionary fixed heterochronies of scale initiation. Another plausible path for diversity in scale number is a change in distance between forming scales that seems to be more appropriate for species represented phylogenetically more distant lineages.

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“…Inhibition of function of thyroid glands by thiourea treatment led to distinguishable retardation of growth rate and developmental rate in both species (Fig. 1, Kuz’mina et al., 2010).…”

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Body size determines the number of scales in cyprinid fishes as inferred from hormonal manipulation of developmental rate

Левин

Bolotovskiy

Levina

2012

Journal of Applied Ichthyology

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“…In contrast, several authors reported a significant increase in growth expressed as TL of fish larvae exposed to TH (Inui & Miwa ; Ayson & Lam ). However, Kuz′mina, Levin, Vei and Rusanova () and Landines et al . () observed that growth rates in Rutilus rutilus and piracanjuba (Brycon orbignyanus) declined after T 3 exposure, despite the marked effects of T 3 effects on organ differentiation.…”

Section: Discussionmentioning

confidence: 99%

Stimulatory effect of thyroid hormones improves larval development and reproductive performance in alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus)

et al. 2013

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Development of alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus) larvae was evaluated after exposure of embryos to thyroid hormones (TH) by two different methods of administration. For the first method, alligator gar embryos were placed in a water bath with triiodothyronine (T3; 1 ppm for 2 h), and control treatment embryos were placed in a water bath without T3. For the second method, spotted gar adult males and females were injected with different TH during induced spawning: a group was injected with T3 [20 mg kg−1 body weight (BW)], a second group with thyroxine (T4; 20 mg kg−1 BW), a third group with thyroid‐stimulating hormone (TSH; 4 IU kg−1BW) and a control group with dimethyl sulfoxide. Both methods resulted in increases in the concentrations of T3 and T4 in embryos of both species. An increase in the alkaline enzymatic activity of TH‐treated larvae was observed as well as an increase in the RNA:DNA, RNA:Dry weight and DNA:Dry weight ratios at hatching. Some positive effects of TH application were: a significant increase in the hatching rate of spotted gar larvae from TH‐injected parents and a higher percentage of successful spawns. Evenness of larval sizes and a higher survival rate were observed in alligator gar larvae. Snout development was accelerated by TH treatment in both species.

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“…Kuzmina et al . () suggested that the mechanisms of influence of T3 on the induction of synthesis of digestive hydrolases in fish seem to be related to those of induction of the synthesis of other molecules of protein. It is probable that hormones interact with one another in the regulation of development and their additive or synergistic effects (Ban ).…”

Section: Discussionmentioning

confidence: 99%

Effect of cortisol and triiodothyronine bath treatments on the digestive enzyme profile and growth ofCatla catlalarvae during ontogenic development

2016

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Digestive enzyme profile is a good indicator of the nutritional and health status of the fish. The present investigation aims to evaluate the effect of exogenous bath treatment of hormones, cortisol and triiodothyronine, on the digestive enzyme activities and growth of carp Catla catla (Ham.) during ontogenic development. Catla larvae (4 days old) were given bath treatment with cortisol (hydrocortisone, 0.2 mg L À1 ), 3,5,3 0 -triiodothyronine (T3, 2.5 mg L À1 ) and a combination of cortisol and T3 for 30 min. Digestive enzyme profile was recorded on every third day and was continued for 30 days. Larvae were fed with live food for initial 14 days and then weaned to mix feeding of live food and prepared diet. Significantly (P < 0.05) higher amylase, total protease, trypsin, chymotrypsin, lipase, chitinase and chitinobiase activities were found in the hormone-treated groups compared to the control one during ontogenic development. Among the treated groups, amylase activity was highest in cortisol-treated larvae. Total protease, trypsin, chymotrypsin, lipase, chitinase and chitinobiase activities were significantly (P < 0.05) higher in larvae exposed at combined treatment of cortisol and T3 compared to the other two groups in most sampling days. Average length, weight and specific growth rate of treated larvae were higher compared to the control one. The combined bath treatment of cortisol and triiodothyronine influenced the digestive enzyme activities of catla larvae and thereby enhanced the growth at early developmental stage. This helps the larvae to overcome the problems associated with early developmental stage.

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Effect of thyroid hormones on activity dynamics of enzymes of intestinal mucosa of juvenile roach Rutilus rutilus

Cited by 6 publications

References 14 publications

Body size determines the number of scales in cyprinid fishes as inferred from hormonal manipulation of developmental rate

Body size determines the number of scales in cyprinid fishes as inferred from hormonal manipulation of developmental rate

Stimulatory effect of thyroid hormones improves larval development and reproductive performance in alligator gar (Atractosteus spatula) and spotted gar (Lepisosteus oculatus)

Effect of cortisol and triiodothyronine bath treatments on the digestive enzyme profile and growth ofCatla catlalarvae during ontogenic development

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