Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for fish weight estimation based on fish tracks identified in images. In some implementations, a method includes obtaining images of fish enclosed in a fish enclosure, identifying fish tracks shown in the images of the fish, determining a quality score for each of the fish tracks, selecting a subset of the fish tracks based on the quality scores, determining a representative weight of the fish in the fish enclosure based on weights of the fish shown in the subset of the fish tracks, and outputting the representative weight for display or storage at a device connected to the one or more processors

Among the various aspects of the present disclosure is the provision of compositions and methods for modulating MYCT1. An aspect of the present disclosure provides for a method of regulating tumor angiogenesis (anti-angiogenesis, Myct1-targeted vascular control) and/or immunostimulation, which inhibit tumor growth, in a subject. The present disclosure provides methods to quantify MYCT1 to predict responsiveness of a subject having a cancer or tumor to a treatment, guide treatment decisions, select subjects for clinical trials, and evaluate the clinical efficacy of certain therapeutic interventions.

A method of constructing a zebrafish notch1a mutant using CRISPR/Cas9 technique. The method includes: determining a target for knocking out notch1a; using primers T7-notch1a-sfd and tracr rev for PCR amplification with a pUC19-gRNA scaffold plasmid as a template; transcribing PCR product in vitro followed by purification to obtain gRNA; and microinjecting the gRNA and a Cas9 mRNA into a zebrafish embryo followed by culture to obtain an notch1a mutant of stable inheritance. The invention selects a specific target and utilizes CRISPR/Cas9 technique to knock out the notch1a in the zebrafish without destroying other genes, generating the zebrafish notch1a mutant. Moreover, the invention also discloses the phenotype of the zebrafish notch1a mutant, which plays a significant role in studying the effect of the Notch1a receptor in the Notch signaling pathway.

The present invention relates to transgenic blue ornamental fish, as well as methods of making such fish by in vitro fertilization techniques. Also disclosed are methods of establishing a population of such transgenic fish and methods of providing them to the ornamental fish industry for the purpose of marketing.

The invention relates to a sex determination (SD) marker of a male Mugilidae fish comprising a nucleic acid sequence corresponding to a sequence of a Follicle-stimulating hormone receptor (FSHR) gene of said fish and including at least one male (Y) specific nucleotide difference when compared to a corresponding sequence on a FSHR gene of a female Mugilidae fish. The invention further concerns uses of this sex determination marker in methods of early sex determination in a Mugilidae fish, methods of sex-reversal of a Mugilidae fish prior to appearance of a sex phenotype, and methods for producing a mono-sex population of Mugilidae fishes.

The present disclosure provides a combination of antisense RNA sequences and use thereof in the production of tilapia with degenerated sexual organs, belonging to the technical field of molecular biology and reproductive biology, the combination of antisense RNA sequences includes antisense RNA of steroidogenic factors SF1-1 and SF1-2; the nucleotide sequences of Anti-SF1-1-I, Anti-SF1-1-II, Anti-SF1-2-I and Anti-SF1-2-II are set forth in SEQ ID NO:1-SEQ ID NO:4 respectively. The method of the present disclosure introduces antisense RNA fragments into the eggs through the fertilization hole to realize effective and accurate targeted intervention for regulating the gene expression, and the method has the advantages of simple operation, minimal egg damage, high success rate, stable phenotype after breeding, and excellent application prospects.

The transplant fish production method includes selecting a donor fish species, selecting first and second fish species which are a combination that could be sterile, producing a hybrid fish species of the selected first fish species and second fish species, and transplanting reproductive cells of the donor fish species into the produced hybrid fish species.

The present invention relates to transgenic ornamental fish, as well as methods of making such fish by germ cell transplantation techniques. Also disclosed are methods of establishing a population of such transgenic fish and methods of providing them to the ornamental fish industry for the purpose of marketing.

What is provided is a fusion protein including any one of proteins of (A) to (C) below; and a tag protein that dimerizes or multimerizes in response to a stimulus, (A) a protein that consists of an amino acid sequence represented by SEQ ID NO: 1; (B) a protein that consists of an amino acid sequence having 70% or more identity with the amino acid sequence represented by SEQ ID NO: 1 and has an aggregate-forming ability, and (C) a protein that consists of an amino acid sequence obtained by performing deletion, substitution, insertion, or addition of one or several amino acids with respect to the amino acid sequence represented by SEQ ID NO: 1 and has the aggregate-forming ability.

Disclosed are fish with impaired reproductive capacity and methods and compositions for producing the same. The reproductively impaired fish may include catfish, such as Ictalurus punctatus. The disclosed methods may be generally useful for mitigating environmental impact of escaped genetically engineered fish.