Chromosome-level genome assembly and annotation of largemouth bronze gudgeon (Coreius guichenoti).

Coreius guichenoti, mainly distributed in upstream regions of the Yangtze River China, is currently on the brink of extinction and listed as national secondary protected animal. In this study, we aimed to obtain the chromosome-level genome of C. guichenoti using PacBio and Hi-C techniques.

Effect of Different Opening Diet on the Growth, the Structure of the Digestive Tract and Digestive Enzyme Activity of Larval and Juvenile .

One of the crucial factors influencing the growth and viability of larvae and juveniles is their opening diets. The objective of this study was to identify suitable initial feed options for larvae and juveniles. A total of 1200 newly hatched with an average weight of 18.

Effects of water temperature on growth performance, digestive enzymes activities, and serum indices of juvenile Coreius guichenoti.

This study was conducted to determine the optimal temperature for Juvenile Coreius guichenoti, which is critically endangered in China. Test fish with an initial body weight range of 17.60-18.

Assessment of eutrophication and nitrogen and phosphorus carrying capacity before and after removing pen culture (2013-2018) in Lake Changhu, China.

In this study, the eutrophication levels and nitrogen and phosphorus carrying capacities of Lake Changhu in Jingzhou, Hubei Province, China, were measured using the trophic level index (TLI) and Dillon model for the first time. The measurements were taken before (2013 and 2015) and after (2017 and 2018) the removal of pen aquaculture from the lake. The lake was divided into three districts: Lake Haizihu, Mahongtai Channel, and Lake Dahu.

Expression Profiles of in , and Their Relation to CpG Methylation of Its Promoter and Temperature.

To elucidate the role of in sex differentiation of a teleost fish , the full-length sequences of its cDNA and promoter were cloned by rapid amplification of cDNA ends (RACE) and genome walking. The relative mRNA expression levels were determined by quantitative real-time PCR (RT-PCR). The 1095-bp cDNA was predicted to encode a protein of 264 amino acids.

Intestinal microbiome and its potential functions in bighead carp () under different feeding strategies.

Bighead carps () were divided into four groups with different feeding strategies: group A, nature live food only (fertiliser only, 200 g urea + 160 g ethylamine phosphate + 250 g Huangjintai bio-fertiliser); group B, nature live food + 1/2 formulated feed; group C, nature live food + formulated feed; and group D, formulated feed only. The intestinal microbiomes of the different groups were compared through the Illumina MiSeq sequencing of the bacterial 16S rRNA gene. The specific growth rate (SGR), survival and blood biochemical factors of the fish were also investigated.

Expression profiles of amh and foxl2 in Schizothorax kozlovi, and their response to temperature during the early developmental stage.

To elucidate the role of amh and foxl2 in sex differentiation of the teleost fish Schizothorax kozlovi, the full-length cDNAs were cloned from the mature testis and ovary by rapid amplification of cDNA ends (RACE), and their relative mRNA expression levels were determined by quantitative real-time polymerase chain reaction among tissues and temperature groups. The complete amh and foxl2 cDNAs of S. kozlovi were 2060 bp and 1750 bp, which encoded 568 and 306 amino acids, respectively.

Effect of rearing temperature on growth and thermal tolerance of Schizothorax (Racoma) kozlovi larvae and juveniles.

Effect of rearing temperature on growth and thermal tolerance of Schizothorax (Racoma) kozlovi Nikolsky larvae and juveniles was investigated. The fish (start at 12d post hatch) were reared for nearly 6 months at five constant temperatures of 10, 14, 18, 22 and 26°C. Then juvenile fish being acclimated at three temperatures of 14, 18 and 22°C were chosen to determine their critical thermal maximum (CTMax) and lethal thermal maximum (LTMax) by using the dynamic method.

[Habitat suitability index model and minimum habitat area estimation of young Procypris rabaudi (Tchang): a simulation experiment in laboratory].

Under the conditions of simulated micro-habitat in laboratory, and by using experimental ecological methods, this paper evaluated the suitability index (HSI) of young Procypris rabaudi for habitat factors (substrate, light intensity and water depth). The habitat suitability models of the young P. rabaudi were established, and the minimum habitat area of the young P.

[Reproductive biology and artificial propagation of Acipenser sinensis below Gezhouba Dam].

A total of 36 females and 21 males of Chinese sturgeon Acipenser sinensis were caught in 1998-2004 excluding 2002 to study the characteristics of their reproductive biology and the effect of their artificial propagation. The results showed that the body length (BL), body mass (BM) and age of the females were 240-320 cm, 140-432 kg, and 15-30 years, and those of the males were 153-284 cm, 70-244 kg and 12-26 years, respectively. The inducing rate was 93.