Interrenal and thyroid development in red drum (Sciaenops ocellatus): Effects of nursery environment on larval growth and cortisol concentration during settlement

Pérez-Domínguez, Rafael; Holt, G. Joan

doi:10.1016/j.ygcen.2005.10.006

Cited by 29 publications

(17 citation statements)

References 36 publications

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“…at 19°C (Cahu and Zambonino-Infante 1994;Zambonino-Infante and Cahu 2001). In the present study, these developmental delays could also have contributed to a growth depression as long as the sea bass larvae were exposed to hypoxia, as already observed in fish larvae (Perez-Dominguez and Holt 2006;Wexler et al 2011). We also found a down-regulation of CS/COX activity ratio in the HT group during hypoxia exposure.…”

Section: Discussionsupporting

confidence: 85%

Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae

Vanderplancke

Claireaux

Quazuguel

et al. 2014

Fish Physiol Biochem

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Since European sea bass (Dicentrarchus labrax) larvae occurred in coastal and estuarine waters at early life stages, they are likely to be exposed to reduced dissolved oxygen waters at a sensitive developmental stage. However, the effects of hypoxia at larval stage, which depend in part on fish species, remain very poorly documented in European sea bass. In the present study, the impacts of an experimental exposure to a chronic moderate hypoxia (40 % air saturation) between 30 and 38 days post-hatching on the physiological and developmental traits of European sea bass larvae were assessed. This study was based on the investigation of survival and growth rates, parameters related to energy metabolism [Citrate Synthase (CS) and Cytochrome-c Oxidase (COX) activities], and biological indicators of the maturation of digestive function [pancreatic (trypsin, amylase) and intestinal (Alkaline Phosphatase "AP" and Aminopeptidase-N "N-LAP") enzymes activities]. While condition of hypoxia exposure did not induce any significant mortality event, lower growth rate as well as CS/COX activity ratio was observed in the Hypoxia Treatment group. In parallel, intestinal enzyme activities were also lower under hypoxia. Altogether, the present data suggest that sea bass larvae cope with moderate hypoxia by (1) reducing processes that are costly in energy and (2) regulating mitochondria functions in order to respond to energy-demand conditions. Both these effects are associated with a delay in the maturation of the digestive function.

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Section: Discussionsupporting

confidence: 85%

Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae

Vanderplancke

Claireaux

Quazuguel

et al. 2014

Fish Physiol Biochem

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“…In Dentex dentex, the first follicle was detected before mouth opening (3 dah) (Santamaría et al 2004). In Sciaenops ocellatus it occurs before the complete yolk consumption (3 dah) (Domínguez and Holt 2006), for Sparus aurata at 4 dph (Power 2001) and for S. senegalensis the first follicles were also observed on the first feeding (4 dah) (Delgado et al 2006). For cobia, the first follicle was observed before the first feeding on the 1 st dah, being, as far as we know, the only studied pelagic species with an early thyroid follicle development.…”

Section: Discussionmentioning

confidence: 92%

Thyroid gland development in Rachycentron canadum during early life stages

Otero

Rodrigues

Sampaio

et al. 2014

An. Acad. Bras. Ciênc.

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The aim of this study was to describe the ontogeny of thyroid follicles in cobia Rachycentron canadum. Larvae were sampled daily (n=15 -20) from hatching until 15 dah (days after hatching). Following, larvae were sampled every two days by 28 dah; a new sample was taken at 53 dah. The samples were dehydrated, embedded in Paraplast, and sections of 3 µm were dewaxed, rehydrated and stained with HE and PAS. A single follicle was already present 1 dah and three follicles were found 8 dah. The number of follicles increased up to 19 on 53 dah. The diameter of follicles and follicular cell height were lower 1 dah (6.83 ± 1.00 and 4.6 ± 0.01 µm), but increased from 8 dah (24.03 ± 0.46 μm e 6.43 ± 0.46 μm). From 8 dah, the presence of reabsorption vesicles was observed in the colloid and from the 19 dah some follicles did not present colloid. The early thyroid follicle appearance in cobia larvae as well as the high quantity of follicles without colloid and/or with vesicles even after the metamorphosis, might be the explanation of the fast growth of the cobia.

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“…Afterward, chloroform (200 ll), methanol (50 ll), and barbital buffer (50 ll; 0.1 M, pH = 8.6) were added to the remaining dried extract in the tubes shaken horizontally for 10 min. The supernatants containing thyroid hormones were transferred to clean tubes and dried at 45°C for 4 h. The dried extracts were dissolved by barbital buffer (1 ml) containing 0.1 % gelatin and kept at -70°C until use (Tagawa and Hirano 1987;Perez-Dominguez and Holt 2006).…”

Section: Methodsmentioning

confidence: 99%

Growth performance and thyroid hormones of Caspian kutum, Rutilus frissi, juveniles in response to dietary carbohydrate levels

et al. 2014

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The aim of this study was to evaluate the effects of a practical diet containing different carbohydrate levels on growth rate, feed utilization, and thyroid hormones (T3 and T4) of Caspian kutum fingerlings. Fish with an initial average weight of 0.8 ± 0.2 g were fed five formulated isonitrogenous and isoenergetic diets with different carbohydrate levels of 15, 20, 25, 30 and 35 % in triplicate groups for 10 weeks. Based on the results, growth performance of Rutilus frissi was significantly affected by the dietary carbohydrate levels (P \ 0.05). Maximum weight gain, specific growth rate, and protein efficiency ratio was observed in the fish fed diet with 35 % carbohydrate. Results of thyroid hormones showed that T4 levels were not significantly different by different carbohydrate levels (P [ 0.05). The highest amount of T4 was observed in kutum juveniles fed with a carbohydrate level of 15 %. The levels of T4 were significantly affected by dietary carbohydrate levels (P \ 0.05) with the highest amount in kutum juveniles fed 15 % of carbohydrate. In conclusion, this study indicates that increasing carbohydrate levels from 15 to 35 %, with no negative effects on growth parameters in R. frissi juveniles, leads to an efficient protein ratio and optimal growth. Moreover, no clear correlation was found between fish growth and thyroid hormones.

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Interrenal and thyroid development in red drum (Sciaenops ocellatus): Effects of nursery environment on larval growth and cortisol concentration during settlement

Cited by 29 publications

References 36 publications

Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae

Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae

Thyroid gland development in Rachycentron canadum during early life stages

Growth performance and thyroid hormones of Caspian kutum, Rutilus frissi, juveniles in response to dietary carbohydrate levels

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