Circannual vitellogenin levels in Chinese loach (Misgurnus anguillicaudatus)

Lv, Xuefei; Shao, Jing; Zhou, Qunfang; Song, Maoyong; Jiang, Guibin

doi:10.1007/s10641-007-9310-x

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…The loach, for a long time, had been considered as traditional Chinese medicine in folk remedies for treatment of hepatitis, osteomyelitis, carbuncles, inflammation and cancer, as well as for restoration to health in debilities caused by various pathogens and aging (Qin et al 2002), some active substances obtained from loach were proved to be of high medical value (Kimura et al 1994;Dong et al 2002;Huang 2005, 2006). Moreover, the loach can be used as an ideal model animal in genetics and toxicology (Khan and Arai 2000;Shao et al 2005;Lv et al 2006Lv et al , 2007Lv et al , 2008; Morishima et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Effects of the timing of initial feeding on growth and survival of loach (Misgurnus anguillicaudatus) larvae

Wang

et al. 2008

Aquacult Int

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The effects of delayed first feeding on growth and survival and starvation on the point-of-no-return of loach Misgurnus anguillicaudatus larvae were studied by evaluating morphometric characteristics under controlled conditions. Larvae began to feed exogenously at 3 days after hatching (DAH) and the PNR occurred between 9 and 10 DAH at 23 ± 1.0°C. The experimental design included a conventional feeding regime with initial feeding from 3 DAH as a control, delayed first feeding for 4, 5 and 6 DAH. Morphometric characteristics (head depth, body depth, eye diameter, mouth diameter, musculature height, total length and yolk sac volume) were evaluated under different initial feeding time (3, 4, 5 and 6 days after hatching). Loach larvae initiated first feeding at 4, 5 and 6 days after hatching achieved comparatively lesser growth performance in all morphometric characteristics than that of 3 days at the end of the experiment. By day 6, significant differences were observed between 3 and 6 days initial feeding larvae for all morphometric characteristics except eye diameter and mouth diameter. Similarly, significant differences were noticed between 3 and 5 days initial feeding. However, there were no significant differences in head depth, body depth, eye diameter, mouth diameter, and total length between 3 and 4 days initial feeding until 12 DAH. After 15 days rearing, significant differences in all morphometric characteristics appeared between 3 and 4 days initial feeding and followed to the end of the experiment. It was also observed that the yolk absorption in loach larvae was completed by 6 days irrespective of the differences in the initial feeding. The yolk volume of 4 and 5 DAH larvae initiated first feeding at 3 days (0.0125 ± 0.0015; 0.0077 ± 0.0009 mm 3 ) had significant differences compared with yolk volume of larvae initiated first feeding at 4 days (0.0081 ± 0.0011; 0.0039 ± 0.0004 mm 3 ), 5 days (0.0079 ± 0.0010; 0.0017 ± 0.0002 mm 3 ) and 6 days (0.0082 ± 0.0011; 0.0016 ± 0.0001 mm 3 ). Survival rates of four treatments were estimated daily for 30 days and significant differences were observed between the treatments at the end of the experiment. The final survival rate was higher when the loach larvae initiated feeding at 3 days (75.9%) when compared with 4 days (31.8%), 5 days (14.5%) and 6 days (6.4%). The present study suggests that the first feeding of loach larvae should be initiated at 3 DAH for achieving better growth and survival or else bad growth performance will engender if the first feeding is delayed.

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Section: Introductionmentioning

confidence: 99%

Effects of the timing of initial feeding on growth and survival of loach (Misgurnus anguillicaudatus) larvae

Wang

et al. 2008

Aquacult Int

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“…Plasma vitellogenin concentration has been shown to peak during vitellogenesis (i.e. before spawning) in several other species, including Chinese loach Misgurnus anguillicaudatus (Lv et al, 2009), Senegalese sole (Guzmán et al, 2008), amberjack (Mandich et al, 2004) and gilthead seabream (Mosconi et al, 1998). On the other hand, vitellogenin in the more closely related Atlantic halibut peaked during spawning (Methven et al, 1992).…”

Section: Discussionmentioning

confidence: 99%

Oocyte development and vitellogenin production in Northwest Atlantic Greenland halibut Reinhardtius hippoglossoides

Rideout¹,

Morgan²,

Lambert³

et al. 2012

J. Northw. Atl. Fish. Sci.

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Histological data presented here supports the notion of an uncommon oocyte development pattern for Greenland halibut, with two simultaneous groups of developing oocytes in the ovary, the larger group developing for the upcoming spawning season and the smaller group developing for next year (i.e. the duration of vitellogenesis is > 1 yr.). We analyzed blood samples collected from wild fish as well as fish that were part of the first documented study of Greenland halibut reproductive development in captivity in order to explore the annual cycle of vitellogenin production for this species. Despite the unusual oocyte development strategy there were no obvious differences in seasonal vitellogenin profiles versus fish with more traditional oocyte development strategies. Blood plasma vitellogenin levels generally peaked prior to or during spawning for those fish that successfully spawned, while patterns were highly variable for fish that did not spawn. Maximum plasma vitellogenin levels observed were 25 mg/ml and within the range of values observed for other fish species. Continued refinements in husbandry and experimental protocols for the study of Greenland halibut in captivity will provide a valuable tool for examining aspects of the species' biology that are difficult to ascertain based on sampling of only wild fish.

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“…In addition, fish are easy to work with and their endocrine systems are similar to those of higher vertebrates. Moreover, studies have demonstrated that fish suffer from the interference of EDCs in their habitats and entire life cycle (Lv et al 2009). Therefore, the majority of the investigations on EDCs have focused on the aquatic environment using fish as experimental models (Pait and Nelson 2003).…”

Section: Introductionmentioning

confidence: 99%

Molecular cloning and mRNA expression of the vitellogenin and nuclear receptor gene induced by 17β-estradiol in the mud carp, Cirrhinus molitorella

Liang

Fang

2011

Ecotoxicology

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Vitellogenins (VTGs), the precursors of yolk proteins, are crucial for the embryonic development of teleosts, and have also been studied extensively as biomarkers for environmental estrogenic mimics. The cDNA of a VTG was isolated from the liver of male mud carp (Cirrhinus molitorella) following induction by 17β-estradiol (E(2)) using 3'- and 5'-RACE methods. It was 4,216 bp in length, and encoded a putative protein of 1,342 amino acids. This putative VTG contained complete portions of lipovitellin I (LVI) and phosvitin, but lacked the C-terminal half of LVII and was thus classed as a type I vitellogenin. In addition, the partial cDNA of estrogen receptors (ERα and ERβ) and androgen receptors (AR) were cloned. The mRNA expression of VTG, ERα, ERβ and AR were examined in the liver of juvenile mud carp exposed to E(2) (0, 5, 50 and 500 ng/l) in the water for 2, 4, 6 and 8 days. Quantitative reverse transcription PCR (RT-PCR) revealed a significant increase in transcript levels of VTG and ERα but not of ERβ and AR. VTG and ERα were expressed in a time-dose-dependent manner. Our results imply that ERα may be the principal subtype that regulates VTG, and that VTG mRNA of mud carp is an ideal biomarker to detect environmental estrogens.

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Circannual vitellogenin levels in Chinese loach (Misgurnus anguillicaudatus)

Cited by 9 publications

References 24 publications

Effects of the timing of initial feeding on growth and survival of loach (Misgurnus anguillicaudatus) larvae

Effects of the timing of initial feeding on growth and survival of loach (Misgurnus anguillicaudatus) larvae

Oocyte development and vitellogenin production in Northwest Atlantic Greenland halibut Reinhardtius hippoglossoides

Molecular cloning and mRNA expression of the vitellogenin and nuclear receptor gene induced by 17β-estradiol in the mud carp, Cirrhinus molitorella

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