Food supply is considered critical for a successful culturing of decapod larvae. However, some species may present yolk reserve sufficient to complete their larval development without external food supply (known as lecithotrophic larval development). In the present study, two experiments were carried out in order to verify whether the callianassid Lepidophthalmus siriboia have lecithotrophic be...

The development and survival of sand fly Phlebotomus papatasi Scopoli (Diptera: Psychodidae) larvae fed feces of Syrian hamsters, Mesocricetus auratus, that had been fed a diet containing novaluron were evaluated. In total, six larval diets were used in sand fly larval bioassays. Four groups of larvae were fed feces of hamsters that had been maintained on a diet containing either 0, 9.88, 98.8,...

The effect of live feed diets containing Brachionus plicatilis (B) and Apocyclops panamensis (A) was investigated on pikeperch larval survival, growth, fatty acid composition in two experiments (E1 E2). Up to six different were provided the larvae, which letters diet names represent organisms as mentioned above subsequent number per larva day. In E1, start cultures with 35 larvae/L supplied (B2...

First posted April 5, 2023 For additional information, contact: Director, Midwest Climate Adaptation Science CenterU.S. Geological Survey1954 Buford Avenue St. Paul, MN 55108Contact Pubs Warehouse Ambystoma barbouri (streamside salamanders) are stream-breeding mole salamanders that rely on seasonally intermittent, fishless streams for egg and larval development but primarily fossorial as adults...

Ecologists have often suggested that the presence of pathogens that differentially affect interacting species may affect the outcome of interactions, yet few experimental studies have documented pathogen-mediated interactions using a natural host–parasite system. We studied the effects of a pathogenic water mold, Saprolegnia ferax, on competitive interactions between the Cascades frog Rana casc...

The effects of water salinity on hatching rate and larval performance Patin Buah (Pangasius nasutus) were studied. fertilized eggs incubated at 27.5–28°C in different concentrations (0, 1, 2, 3 ppt) until hatch. 0 ppt (48.6 ± 3.7%), 1 (52.5 2 (39.7 6.4%) significantly higher (P < 0.05) than (14.8 2.0%). percentages survival day 30 65 1.5%, 72 5.0%, 57 15.0%, 32 3.1% ppt, respectively. Survival ...

We evaluated the potential of Mesocyclops annulatus as a control agent of Aedes aegypti in La Plata city (Argentina). Mosquito larval survivorship due to predation by these copepods was estimated at weekly intervals during the oviposition period of A. aegypti. Mean weekly A. aegypti larval survivorship in cylindrical plastic containers (12 cm height and 11 cm diameter) with copepods was signifi...

Exposure to stress during an insect's larval development can have carry-over effects on adult life history traits and susceptibility to pathogens. We investigated the effects of larval nutritional stress for the first time using field mosquito vectors and malaria parasites. In contrast to previous studies, we show that larval nutritional stress may affect human to mosquito transmission antagoni...

Studies of coral reef fish recruitment have focused more on factors influencing the return of larvae to reefs and the process of settlement than on factors affecting survival in the plankton, despite the well-documented importance of the larval environment for temperate marine species. We examined the ability of environmental factors to explain temporal patterns of recruitment in 8 taxa of cora...

During downstream transport from rivers to estuaries, early larval stages of the Amazon River prawn Macrobrachium amazonicum (Heller 1862) are likely exposed to planktonic food limitation. In the laboratory, we studied the effects of presence or absence of food on larval survival, moulting and biomass (dry mass, and content of carbon, hydrogen and nitrogen). Unfed larvae developed successfully ...