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.
postlarvae, etc ; Macrobrachium rosenbergii; ammonia; aquaculture; lethal concentration 50; Show all 5 Subjects
Abstract:
... This study aimed to determine the median lethal concentration (LC₅₀) of total ammonia and nitrite's combined effect for Macrobrachium amazonicum and Macrobrachium rosenbergii post-larvae at 96 h of exposure and then present their safety levels. In the trial 640 post-larvae of M. amazonicum (2.2 ± 0.2 cm and 0.08 ± 0.02 g) and 640 post-larvae of M. rosenbergii (2.2 ± 0.3 cm and 0.07 ± 0.02 g) were ...
... The timing of metamorphosis has recently been referred as a more suitable proxy to evaluate postlarval quality than size. Indeed, while displaying a larger size at settlement, late settlers that originate from larvae that have delayed metamorphosis commonly display poorer growth performances This delay in metamorphosis is possibly at the expenses of larval endogenous energetic reserves that, once ...
postlarvae, etc ; Carcinus maenas; Mya arenaria; clams; frequency distribution; juveniles; littoral zone; mortality; plankton; predation; research; shellfish; summer; Show all 13 Subjects
Abstract:
... Despite estimates of very high (>99.9%) pre-settlement mortality, the extremely large numbers of eggs released into the plankton means that there are abundant post-larval softshell clams (Mya arenaria) available to settle and populate intertidal flats. Many seemingly suitable flats remain devoid of clams, presumably due to post-settlement predation. Predator exclusion/clam recruitment boxes (woode ...
Bruno José Corecha Fernandes Eiras; Daniel Abreu Vasconcelos Campelo; Lorena Batista de Moura; Liliane Marques de Sousa; Isabele Silva Nunes; Leonnan Carlos Carvalho de Oliveira; André Magalhães; Rauquírio Marinho da Costa
postlarvae, etc ; Heros severus; Moina; Pterophyllum; allometry; aquaculture; condition factor; experimental design; growth performance; intestines; specific growth rate; weight gain; Show all 12 Subjects
Abstract:
... The aim of the present study was to determine the best feeding for angelfish (Pterophyllum scalare) and severum (Heros severus) post-larvae fed with Moina sp. during their first feeding phase. For this purpose, growth performance and intestinal histomorphometry of angelfish and severum post-larvae under different feeding rates and frequencies were evaluated. The experiment was conducted for 20 day ...
postlarvae, etc ; Lampanyctus; early development; ichthyology; pigmentation; Indian Ocean; Show all 6 Subjects
Abstract:
... Illustrated description of the postlarval stage of development of Lampanyctus indicus from the Indian Ocean is given for the first time; it differs from the other Lampanyctus larvae mainly in pigmentation. The problems of identifying of the early development stage of this taxa are considered. ...
postlarvae, etc ; Macrobrachium rosenbergii; agriculture; domestication; survival rate; temperature; Show all 6 Subjects
Abstract:
... To understand the growth and survival during the postlarval stage of Macrobrachium rosenbergii, commonly known as the giant freshwater prawn, two experiments were performed which explored the differences in growth and survival rates between wild and captive postlarvae and the effect of temperature on survival and growth. The postlarvae reared at 27 and 30°C grew significantly throughout the experi ...
postlarvae, etc ; Alteromonas; Bacteroidetes; Fenneropenaeus indicus; Roseobacter; bacterial communities; community structure; eggs; genomics; hatcheries; immunity; intestinal microorganisms; intestines; nauplii; nutrient uptake; reproduction; shrimp; Show all 17 Subjects
Abstract:
... Gut microbiota is known to influence the physiology, health, nutrient absorption, reproduction, and other metabolic activities of aquatic organisms. Microbial composition can influence intestinal immunity and are considered as health indicators. Information on gut microbial composition provides potential application possibilities to improve shrimp health and production. In the absence of such info ...
postlarvae, etc ; Bivalvia; cell cleavage; concrete; juveniles; larvae; oysters; research; shellfish; Show all 9 Subjects
Abstract:
... Some genera of bivalve molluscs have an iconic ancestral history that predominates in the culture of a civilization through time. The Pacific thorny oyster Spondylus crassisquama is a living example of this. This study presents the description of the early life cycle until obtaining juveniles; and, for the latter, different types of substrates were evaluated. Larval culture was developed under lab ...
... Vibriosis, including the luminescent shrimp disease and acute hepatopancreatic necrosis disease (AHPND), with Vibrio harveyi as one of their causative agents, is a major shrimp disease causing huge economic losses in the Philippines, Thailand, Vietnam and other Southeast Asian countries. It is induced through the formation of biofilm as a result of bacterial cell-to-cell communication or quorum se ...
postlarvae, etc ; animal welfare; aquaculture; color; feed conversion; freshwater; larvae; metamorphosis; reproductive performance; Show all 9 Subjects
Abstract:
... The effect of background color on aquatic invertebrates has been studied for almost two centuries. Many species of aquaculture significance are influenced by this variable. Larval stages appear to benefit from darker backgrounds perhaps because of increased contrast between feed particles. Post-larval invertebrates also gain from background color. Reports indicate that certain species-specific tan ...
postlarvae, etc ; Isochrysis; Pavlova; Pinctada; algae; aquaculture; confidence interval; experimental design; oysters; temperature; Show all 10 Subjects
Abstract:
... The growth and survival of pearl oyster postlarvae (Pinctada martensii) were studied under laboratory conditions. A face-centered central composite experimental design was used with 3 factors, temperature (18―34 °C), algal ration (5―100 cells μL―¹) and stocking density (0.2―3.0 in.. mL―¹). Pearl oyster postlarvae were fed with a 1: 1 mixture of Isochrysis zhanjiangensis and Pavlova viridis during ...
postlarvae, etc ; Cottus reinii; Pleistocene epoch; Trachidermus fasciatus; biocenosis; climate; freshwater; global cooling; habitats; lifestyle; new taxa; phylogeny; Arctic region; East China Sea; Okhotsk Sea; Sea of Japan; Show all 16 Subjects
Abstract:
... The pattern and time frame of sea sculpin adaptation to the freshwater lifestyle are shown. The major factors that drive this process are the forced invasion in fresh waters due to climate cooling and the migration of postlarval juveniles from more complex coastal biocenoses to estuaries and lower reaches of rivers. The ranges of two phylogenetic lineages of sculpins (autochthonous Asian and its A ...
postlarvae, etc ; Lactobacillus; Macrobrachium rosenbergii; body weight; diet; growth performance; hemolymph; industry; juveniles; meta-analysis; probiotics; regression analysis; shrimp culture; specific growth rate; survival rate; variance; weight gain; Show all 17 Subjects
Abstract:
... Probiotics are widely used in commercial shrimp aquaculture, but responses are variable. The objectives of this study were to quantitatively review using meta-analysis the production, survival, and immune responses of Macrobrachium rosenbergii to probiotics and to identify sources of residual variation. A total of 58 comparisons from 16 experiments (full text articles) were included in the final m ...
... Penaeid shrimp embryos undergo holoblastic division, gastrulation by invagination, and hatching as a nauplius larva. Posterior segments form and differentiate during larval development. Hedgehog (Hh) pathway genes from penaeid shrimp and other pancrustaceans were identified by in silico analysis of genomes and transcriptomes, and mapped onto a recent pancrustacean phylogeny to determine patterns o ...
postlarvae, etc ; Litopenaeus vannamei; RNA; crude protein; feces; feed conversion; lipids; mariculture; research; squid; Show all 10 Subjects
Abstract:
... Bigfin reef squid (Sepioteuthis lessoniana) has been successively cultured through multiple generations, but little is known about the factors affecting feeding regimens. In the current study, optimal feeding frequency of five‐week‐old bigfin reef squids was investigated in laboratory conditions. The squids (1.48 ± 0.03 g initial weight) were assigned to four feeding frequencies: two (2TD), three ...
postlarvae, etc ; Litopenaeus vannamei; alpha-amylase; ammonium nitrogen; antioxidant activity; antioxidants; aquaculture; body weight; dietary protein; enzyme activity; extrusion; growth performance; hepatopancreas; immunity; shrimp; specific growth rate; stress tolerance; Show all 17 Subjects
Abstract:
... The present study was conducted to evaluate the effects of pelleted and extruded diets of different protein levels on the growth performance, digestive enzyme activity, antioxidant capacity, nonspecific immunity, and ammonia‐N stress tolerance of postlarval Pacific white shrimp Litopenaeus vannamei. The shrimp were fed six diets, including extruded diets with dietary 41% protein (E41), 43% protein ...
... Vibrio-related diseases cause significant economic impact on global shrimp production. Although toxin expression is a well-established mechanism of Vibrio-related disease in humans, the role of toxin expression in Vibrio disease in aquaculture generally is not well defined. The current study investigated a sustained, rapid onset, mass mortality at a commercial tiger prawn, Penaeus monodon, hatcher ...
postlarvae, etc ; Enterocytozoon; Litopenaeus vannamei; Vibrio; aquaculture; diet; growth retardation; intestinal microorganisms; intestines; pathogens; shrimp; Show all 11 Subjects
Abstract:
... Increasing evidences have showed that a tight link among pathogen infection, physiological indicators and intestinal microbiota. To investigate effects of Enterocytozoon hepatopenaei (EHP) infection to growth retardation and intestinal microbiota, different sized Pacific white shrimp (Penaeus vannamei) infecting with EHP were studied. The shrimp with big, medium and small sized groups were from sa ...
postlarvae, etc ; Litopenaeus vannamei; Vibrio campbellii; death; fish; necrotizing hepatopancreatitis; plasmids; shrimp; toxicity; toxins; virulence; Show all 11 Subjects
Abstract:
... PirAB is a binary toxic protein that causes acute hepatopancreatic necrosis disease (AHPND) in shrimp. Their closest homologs, PirAᵛᶜ‐like and PirBᵛᶜ‐like proteins, are encoded by two adjacent genes on a non‐pVH plasmid from a Vibrio campbellii strain. Herein, PirABᵛᶜ‐like protein caused neither abnormalities nor death in shrimp postlarvae (Litopenaeus vannamei); furthermore, typical AHPND clinica ...
postlarvae, etc ; DNA; amino acid sequences; cysteine; genes; heavy metals; hepatopancreas; marine pollution; nauplii; stomach; Show all 10 Subjects
Abstract:
... Metallothioneins (MTs) belong to a conserved low-molecular-weight protein family that participates in heavy metal binding and detoxification. EcMT-1 was amplified by PCR from genomic DNA of Exopalaenon carinicauda. It contained a 180 bp open reading frame and encoded 59 amino acids. A total of 18 cysteine (Cys) residues were found in the deduced amino acid sequence, which was consistent with the C ...