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hatcheries, etc ; cages; death; farms; models; mortality; regression analysis; salmon; Show all 8 Subjects
Abstract:
... This study describes the patterns of mortality and investigates the sources of variation in mortality during the marine phase of commercial salmon farming. The study included daily mortality records from stocking to harvest of 21 million salmon from ten hatcheries in 136 fish‐groups (fish in the same cage from the same hatchery). The fish was stocked in 2017–2018 at 21 marine farms within two Norw ...
hatcheries, etc ; Salmo salar; basins; fish; laws and regulations; Canada; Lake Ontario; Show all 7 Subjects
Abstract:
... Lake Ontario Atlantic salmon (Salmo salar) were one of the first species of fish to be cultured in Canada. Their story goes from abundance in the 1700s to protective legislation in 1807, then hatchery culture in 1866 and finally ends in extirpation in 1898. The standard narrative is that Samuel Wilmot’s hatchery efforts briefly staved off their loss from the Lake Ontario basin. However, that story ...
hatcheries, etc ; Copepoda; Plectropomus leopardus; Rotifera; iodine; larviculture; marine fish; metamorphosis; triiodothyronine; zooplankton; Show all 10 Subjects
Abstract:
... Coral trout Plectropomus leopardus is a high-economical value of marine fish commodity. So, the larviculture for this species should be performed in hatchery scale for their sustainability. One of the important thing in larval stage is hormonal mechanisms. Thyroid hormone is known plays an important role in the metamorphosis of marine fish larvae. The source of that hormone is assumed derived from ...
hatcheries, etc ; algorithms; automation; computer vision; databases; humans; otoliths; provenance; research; salmon; Pacific Rim; Show all 11 Subjects
Abstract:
... We present a computer vision method for identifying and reading hatchery marks in salmon otoliths. Synthetic otolith marks are used at hundreds of hatcheries throughout the Pacific Rim to record the release location of salmon. Each year, human readers examine hundreds of thousands of otolith samples to identify the marks in captured salmon. The data guide hatchery investments and inform dynamic ma ...
hatcheries, etc ; Trachinotus blochii; aquaculture; feed conversion; growth performance; specific growth rate; weight gain; Show all 7 Subjects
Abstract:
... Hatchery produced silver pompano, Trachinotus blochii fingerlings were stocked in nine cages at three different stocking densities of 15 (SD15), 10 (SD10) and 5 individuals m⁻³ (SD5) in triplicate. The results indicated that the percent weight gain, specific growth rate, and average daily growth were decreased with the high stocking density (SD15), and better performance was also observed in the l ...
hatcheries, etc ; Fenneropenaeus indicus; aquaculture; breeding stock; females; males; molting; reproductive behavior; spermatophores; viability; Show all 10 Subjects
Abstract:
... Monosex culture was proven to be an effective rearing method for grow-out, but in a closed-cycle hatchery, males and females are usually reared communally in tanks until maturation. This study determined the effect of communal rearing (CR) and separate rearing (SR) on male and female Penaeus indicus broodstock gonad maturation. This study also evaluated the influence of the rearing method on repro ...
Clinten A. Graham; Hamed Shamkhalichenar; Valentino E. Browning; Victoria J. Byrd; Yue Liu; M. Teresa Gutierrez-Wing; Noel Novelo; Jin-Woo Choi; Terrence R. Tiersch
hatcheries, etc ; Ictalurus punctatus; aquaculture; catfish; data collection; image analysis; neural networks; ovarian development; ultrasonics; Show all 9 Subjects
Abstract:
... Machine learning is a powerful tool to improve efficiency of industrial processes, but it has not yet been well utilized in aquacultural and hatchery applications. The goal of the present study was to evaluate the feasibility of using a broad array of machine learning approaches (testing of >200 vectorization and model combinations, reporting on 20) to classify ultrasound images spanning annual ov ...
hatcheries, etc ; Avian orthoavulavirus 1; chickens; genotype; immunology; inactivated vaccines; microbiology; mortality; vaccination; weight gain; Show all 10 Subjects
Abstract:
... The effectiveness of two vectored ND vaccines (Innovax® ND and Vectormune® ND) was tested, in single and prime-boost vaccination programs, against challenge with velogenic NDV genotype VII, in eight chicken groups (G). G1 and G2 were control groups. G3–5 received Innovax® ND, while G6–8 received Vectormune® ND on the hatchery. Additionally, G4 and G7 received live La Sota two-weeks later, and G5 a ...
hatcheries, etc ; Caretta caretta; composite polymers; latex; marine science; polyethylene; polypropylenes; reproductive success; rubber; Spain; Show all 10 Subjects
Abstract:
... We studied microdebris in three western Mediterranean beaches in East Spain. One of them is urban, while the other two are located in a protected environment. Moreover, one of them is used as hatchery for loggerhead turtles’ (Caretta caretta) sporadic nesting activity. Here, we discuss the amount and type of microdebris in the area in different seasons, as well as at the surface and at 40 cm depth ...
hatcheries, etc ; Anoplopoma fimbria; Aquila chrysaetos; aquaculture; breeding stock; mortality; parentage; progeny; research; British Columbia; Show all 10 Subjects
Abstract:
... Sablefish (Anoplopoma fimbria) is a commercially valuable species in Canada with limited aquaculture development. In this study, we partner with Golden Eagle Sablefish in British Columbia (Canada) to assess the role of brood stock selection in hatchery production. Mortality in the hatchery setting is high, especially during the first year of development; thus, interventions that enhance early surv ...
hatcheries, etc ; Artemia; Dicentrarchus labrax; aquaculture; cost effectiveness; diet; fish larvae; live feeds; marine fish; research; Show all 10 Subjects
Abstract:
... The promise of an off‐the‐shelf, microparticulate diet for first feeding marine larval fish is still one of the ‘holy grails’ of the hatchery manager. Replacing the laborious live feed production facilities with high‐quality microdiets will greatly increase marine larval production, improve hatchery consistency and will help in cost reduction in fry production. Over the last decades, many scientif ...
hatcheries, etc ; Crassostrea virginica; DNA; aquaculture; case studies; coasts; larvae; microbial communities; microorganisms; oysters; shellfish; starvation; Show all 12 Subjects
Abstract:
... We present oyster larval microbiota from two feeding studies, in which wild type and low-salinity tolerant lines were either fed or starved. In one study, all larvae unexpectedly died, which was concurrent with an event in which all larvae in an adjoining oyster hatchery also died. In the other study, no crash occurred in either the study or hatchery. In both cases, larvae were collected and store ...
hatcheries, etc ; Scophthalmus maximus; body weight; ichthyology; pH; sperm concentration; sperm motility; spermiation; turbot; Black Sea; Show all 10 Subjects
Abstract:
... In this study sperm characteristics (sperm volume, sperm volume per kg fish, spermatocrit, sperm concentration, pH, and sperm motility) of wild‐caught and hatchery‐reared turbot (Scophthalmus maximus), originated from the Black Sea population, were assessed. In this regard, two different trials were conducted. On the Trial‐I, sperm characteristics of wild‐caught and hatchery‐reared turbot (4‐, 7‐, ...
Éverton Luís Zardo; Darci Carlos Fornari; Daniel Antônio Rotili; Rômulo Batista Rodrigues; Itamar Cossina Gomes; Julia Giora; Juan R. Esquivel‐Muelbert; Leonardo J. G. Barcellos; Danilo Pedro Streit Jr
... Although Brycon orbignyanus has traditionally been extensively fished in the Paraná and Uruguay basins, anthropic events and fishing pressure have substantially diminished natural stocks. Restocking programmes have, nevertheless, aided efforts to restore the stocks of this fish in its former ranges. The objective of this study was to characterize the spermatogenesis and reproductive cycle of male ...
... Captive propagation has become an important tool in the conservation of imperiled freshwater mussels. Previous studies provide conflicting results about the effects of food abundance on survival and growth of juvenile mussels in aquaculture, and the extent to which growth in the hatchery reflects growth in the wild is unknown. We evaluated the effects of abundance of an algal-based diet on surviva ...
hatcheries, etc ; agriculture; color; computer vision; eggs; image analysis; industry; models; roughness; support vector machines; texture; variance; Show all 12 Subjects
Abstract:
... Highlights An adaptive group eggs segmentation was proposed, which separates a single egg from the group eggs image. Key color features and texture features were extracted from the RGB and HSI histograms, respectively. The Support Vector Machine (SVM) model and Least Squares Support Vector Machine (LS-SVM) model were built to distinguish infertile egg and dead-embryo egg, respectively.LS-SVM model ...
... Horne, AJ, Jung R. 2022. Hypolimnetic oxygenation 5. Copper, zinc, iron, and manganese declines in Camanche Reservoir downstream of an abandoned mine. Lake Reserve. Manage. 38:139–149. An abandoned mine upstream of Camanche Reservoir in California had increased sediment copper (Cu) and zinc (Zn) concentrations by 10-fold. Regulators and environmentalists claimed that a hypolimnetic oxygenation sys ...
... For species of conservation concern, including lake sturgeon (Acipenser fulvescens), maintaining genetic diversity is critical for successful restoration. Great Lakes lake sturgeon restoration increasingly relies on hatchery supplementation and stream-side rearing facilities that utilize collections of eggs and offspring of early life stages. The number of wild-caught eggs/larvae sampled is not li ...
... Striped murrel (Channa striata) is a high-value food fish in South and Southeast Asian countries with substantial medicinal properties. High growth rate, consumer preference and year-round market demand insist its candidacy in aquaculture. In addition, striped murrel is suitable for high-density intensive farming systems due to its air-breathing ability. In recent years, the decline in their captu ...
... The transition from endogenous to exogenous feeding is critical during fish early life, where appropriate feed availability and timing of initiation of feeding influence survival. For European eel (Anguilla anguilla), establishing first feeding culture is at a pioneering state, where successful production of larvae has recently enabled feeding experiments. In the present study, three diets and pot ...