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Morphological and histological changes in digestive tract development during starvation in the miiuy croaker
Shan, Xiujuan1,2; Quan, Hanfeng3; Dou, Shuozeng4
2016-04-01
Source PublicationFISH PHYSIOLOGY AND BIOCHEMISTRY
Volume42Issue:2Pages:529-546
SubtypeArticle
AbstractA histological method was used to describe the ontogenetic development of the digestive tract of laboratory-reared miiuy croaker (Miichthys miiuy) and to evaluate the effects of short-term food deprivation on the morphology and histology of the digestive tract. Larvae and juveniles were maintained at 24 A degrees C in a thermostatically controlled system. Three starvation experiments were conducted during different developmental stages: 1-7 days after hatching (dah; prior to benthic swimming); 26-35 dah (during settling); and 42-53 dah (after benthic swimming). According to the structural changes in the ontogenetic development of the digestive tract, three stages were observed. The first stage was from hatching to 3 dah; the digestive tract was undifferentiated in newly hatched larvae and then showed remarkable morphological changes and differentiation. During this period, larvae depended on endogenous nutrition. The second stage (4-20 dah) was a critical period in which larvae transitioned from endogenous feeding to exogenous feeding and the digestive tract fully differentiated into the buccopharynx, oesophagus, stomach, anterior intestine and posterior intestine. Goblet cells and vacuoles appeared in the digestive tract, and pharyngeal teeth and taste buds developed. During the third stage (20-36 dah), the gastric glands developed and the stomach differentiated into the fundic, cardiac and pyloric regions. At 25 dah, pyloric caeca developed and mucosal folds and spiral valves were clearly distinguishable. After 30 dah, the digestive tract did not undergo any noticeable differentiation, indicating the complete development of the digestive system. The wet weight and SGR (specific growth rate) of miiuy croaker larvae and juveniles greatly decreased when they were deprived of food, and compensatory growth was observed in re-feeding juveniles. The livers of starved larvae and juveniles were atrophied and dark coloured, the intestines were transparent and thin, and the stomach cubages were reduced. The histological effects of starvation were mainly evident in the degeneration of cells in digestive organs, as seen in the shrinkage and separation of cells and the loss of intercellular substances in the liver, pancreas, intestine and stomach. These changes became more severe with increased duration of starvation. In addition, the histological structure of the digestive tracts of starved larvae and juveniles partly recovered after re-feeding, and the effects of starvation on miiuy croaker were age dependent.
KeywordMiiuy Croaker Miichthys Miiuy Digestive Tract Ontogenetic Development Histology Starvation
DOI10.1007/s10695-015-0157-3
Indexed BySCI
Language英语
WOS IDWOS:000372961400012
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/126246
Collection海洋生态与环境科学重点实验室
Affiliation1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Marine Fisheries Resource, Minist Agr, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266235, Peoples R China
3.Fisheries Inst Mindong, Ningde 352100, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Shan, Xiujuan,Quan, Hanfeng,Dou, Shuozeng. Morphological and histological changes in digestive tract development during starvation in the miiuy croaker[J]. FISH PHYSIOLOGY AND BIOCHEMISTRY,2016,42(2):529-546.
APA Shan, Xiujuan,Quan, Hanfeng,&Dou, Shuozeng.(2016).Morphological and histological changes in digestive tract development during starvation in the miiuy croaker.FISH PHYSIOLOGY AND BIOCHEMISTRY,42(2),529-546.
MLA Shan, Xiujuan,et al."Morphological and histological changes in digestive tract development during starvation in the miiuy croaker".FISH PHYSIOLOGY AND BIOCHEMISTRY 42.2(2016):529-546.
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