An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Jôsie Schwartz Caldas; Adriele Lima da Silva; Leandro Melo de Sousa; Erilda Barbosa de Sousa; Iann Leonardo Pinheiro Monteiro; Fábio José Torres de Barros; Leandro Godoy
... Reproduction in fish is influenced by several environmental factors. In many cases, failure in reproduction is common once fish are no longer in their natural habitat. Thus, the use of exogenous hormones has been crucial to control the reproductive cycle of many fish species under ex situ conditions. These hormonal stimulations became yet more important for those species facing extinction, as the ...
Cyprinus carpio; adenosine triphosphate; captive animals; carp; cell viability; energy metabolism; males; phosphoproteins; phosphorylation; protein folding; proteome; reactive oxygen species; seminal plasma; signal transduction; sperm motility; sperm quality; spermiation
Abstract:
... Hormonal stimulation of spermiation is the most commonly used method for carp kept in captivity. Recent studies have suggested that hormonal stimulation of carp resulted in changes of the seminal plasma proteome. However information regarding proteome changes in spermatozoa upon hormonal stimulation is lacking. Here, we aimed to compare the sperm quality parameters and spermatozoa proteomes of hor ...
... Atlantic sturgeon (Acipenser oxyrinchus), also known as Baltic sturgeon, is considered extinct in German waters. Fish‐rearing for conservation purposes largely relies on classical hatchery technology focusing on traits like survival and growth in captivity but rarely focusing on subsequent life in the wild, lacking skills such as foraging or anti‐predation behavior. Predation is hence a major fact ...
... Inclusion of sustained-release androgen implants into fertility treatment regimes of female freshwater eels has been proposed to benefit artificial maturation outcomes. This study sought to test whether co-administration of the androgen 17-methyltestosterone (17-MT) in combination with ‘traditional’ hypophysation of female European silver eels would affect egg quality and subsequent larval surviva ...
... Reproduction in captivity is a key study issue in Anguilla anguilla as a possible solution for its dwindling population. Understanding the mechanisms controlling the production of ribosomal building blocks during artificially induced oocyte maturation could be particularly interesting. Transcription levels of ribosomal biogenesis associated genes could be used as markers to monitor oogenesis. Eels ...
... The objective of the study was to obtain baseline data on haematological parameters, blood cell sizes and morphology in cultured male and female Gymnocypris eckloni Herzenstein, 1891. Forty‐eight healthy 3‐year‐old G. eckloni (26 males: 525.79 ± 48.56 g weight, 34.51 ± 1.88 cm total length; 22 females: 507.60 ± 54.48 g weight, 33.97 ± 1.84 cm total length) were used for this study. Both male and f ...
... The aim of this work was to determine the effects of dark and light conditions on the E2, testosterone and thyroid hormones levels and on the gene expression levels (vitellogenin 1, vitellogenin 2, and estradiol receptor one) in European eels (Anguilla anguilla) during ovarian development induced by increasing doses of carp pituitary extracts (CPEs). The subjects were divided into 2 groups: 14-hou ...
Artemia salina; Steindachneridion parahybae; captive animals; carp; catfish; females; hatching; nauplii; oocytes; ovulation; rearing; water temperature; watersheds; Brazil
Abstract:
... Steindachneridion parahybae is an endemic catfish to the Paraiba do Sul river basin classified as critically endangered. Little is known about the reproductive management of this species in captivity, adopting for this practice empirical measures. The objectives were to: (1) determine suitable Accumulated Thermal Units (ATUs) at the moment of ovulation in January 2011 and 2012; (2) follow initial ...
captive animals; carp; osmolality; pH; seminal plasma; sperm concentration; sperm motility; spermatozoa; water temperature
Abstract:
... The present study assessed the semen production and spermatozoa characteristics of Steidachneridion parahybae throughout one reproductive cycle in captivity and the effect of the induction of maturity with carp pituitary extract (CPE). Hence, six semen samples were collected from 26 specimens of S. parahybae. The samples were divided into two groups (non‐induced and induced) and tested between Oct ...
... The objective of the present study was to obtain spontaneous reproduction in captivity of the European eel (Anguilla anguilla) by using a new closed recirculating aquaculture system provided with spawning and incubation chambers. The influence of two levels of water-flow rates (Low-Flow: 0.8±0.05L/s and High-Flow: 2.4±0.05L/s) on the spawning, fecundity and egg quality was also investigated. For t ...
... Two gonadotropins (GtH; Qa and Qb) were purified by gel filtration and ion exchange chromatography from the pituitaries of Indian walking catfish (Clarias batrachus). The presence of GtH during purification was assessed by in vitro oocyte maturation and in vivo steroidogenic activity, and their identities were determined by elution profiles, molecular weight, biological activities and yield. The m ...
fish farms; DNA damage; enzymes; lipid peroxidation; lipids; freshwater fish; vitamins; biomedical research; gel electrophoresis; sturgeon; oxidative stress; marine fish; amino compounds; DNA; carp; amino acids; oxidation; spermatozoa; embryogenesis; conservation programs; seminal plasma; genetic resources; fish culture; proteins; DNA fragmentation; cryopreservation; biotechnology; nutrition; captive animals; nucleotide sequences
Abstract:
... Cryopreservation is of interest not only for fish farming but also for the conservation and genetic improvement of resources. This technique has been well established in some freshwater fish species mainly, salmonid, sturgeons and carps, however, only in the last decade research was focused in marine fish species. The benefits of sperm cryopreservation include: (i) synchronization of gamete availa ...
... Knowledge about the effects of captivity and environmental stress on fish populations is basic to culture them for ornamental, conservation or exploitation purposes. The aim of this study was to test how captivity affect morphological development of bilateral characters and whether levels of fluctuating asymmetry, morphological abnormalities and ectoparasites reflect developmental stress caused by ...
cages; captive animals; carp; dose response; females; fingerlings; gonadotropin-releasing hormone; hatcheries; hatching; human chorionic gonadotropin; indigenous species; larvae; ovulation; ponds; synthetic hormones; China; South East Asia
Abstract:
... Aquaculture of Spinibarbus denticulatus (Oshima, 1926), a fish species indigenous to North Vietnam and Eastern China, is constrained by lack of fingerlings for stocking ponds and cages. As these fish do not naturally breed in captivity, carp pituitary extract (CPE), luteinizing hormone-releasing hormone analogue (LHRHa) with domperidone (DOM) and human chorionic gonadotropin (HCG) were administere ...