Broodstock management and induced spawning of flounder Paralichthys orbignyanus (Valenciennes, 1839) under a closed recirculated system
نویسندگان
چکیده
منابع مشابه
Hormone Induced Spawning of Summer Flounder Paralichthys dentatus
-During their first year in captivity, summer flounder Parulicthys denratus were induced to spawn with gonadotropin releasing hormone analogue (GnRHa) implants, injected carp pituitary extract (CPE) or human chorionic gonadotropin (hCG) injections. The percentage of fertile eggs was greatest (-69%) in CPEtreated females. CPE, but not GnRHa or hCG, was capable of stimulating oocyte growth (incre...
متن کاملCharacterization of digestive enzymes from captive Brazilian flounder Paralichthys orbignyanus.
Knowledge of specific enzyme activity, along with animal habits and digestive capacity is essential in formulating an appropriate diet for any species. In this study, we evaluated and characterized the activity of digestive enzymes present in the liver, intestine, and stomach of Paralichthys orbignyanus. The effects of pH and temperature on enzyme activity were also evaluated via the use of spe...
متن کاملDetermining Sexual Maturity of Broodstock for Induced Spawning of Fish
The external appearance of brood fish has long been used to assess the stage of sexual development. In some species, males change in appearance during the spawning season (e.g., vivid breeding colors in cichlids, hooked jaw in salmon, and roughened texture of the pectoral fins or head of cyprinids). These physical changes make it relatively easy to identify sexually mature males. However, secon...
متن کاملSpermatic abnormalities of piracanjuba Brycon orbignyanus (Valenciennes, 1849) after cryopreservation.
The objective of this research was to verify the presence of spermatic abnormalities on semen of Brycon orbignyanus after cryopreservation. Semen was collected from ten four-year-old males who presented secondary reproductive characteristics for migrating fish. Sperm was evaluated for motility, vigor and spermatic morphology before and after cryopreservation. A cryoprotectant solution was made ...
متن کاملAssessment of Dredging-induced Sedimentation on Winter Flounder Spawning Habitat
This study investigates the fate of sediment suspended due to dredging in Newark Bay, New Jersey to characterize exposure of winter flounder spawning habitat. Winter flounder is a recreationally and commercially significant species which has experienced a steady population decline over the last twenty years. Winter flounder eggs are demersal and adhesive. Possible factors affecting spawning hab...
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ژورنال
عنوان ژورنال: Revista de biología marina y oceanografía
سال: 2006
ISSN: 0718-1957
DOI: 10.4067/s0718-19572006000100007