The conversion of hemoglobins (Hbs) and red blood cells (RBCs) from the larval to the adult type was monitored during normal metamorphosis in Xenopus laevis, and in artificially induced metamorphosis-arrested and precociously metamorphosed animals by means of SDS-PAGE, Hb immunohistochemistry, and double-staining with in situ DNA nick-end labeling (TUNEL) for detection of apoptosis and Hb immun...

The marine polychaete Streblospio benedicti exhibits two distinct larval types, making it a model for the study of developmental evolution. Females produce either large eggs or small ones, which develop into distinct lecithotrophic or planktotrophic larvae with concomitant morphological and life-history differences. Here, we investigate the inheritance of key morphological traits that distingui...

We examined the utility of fluorescent fatty acid analog dyes for labeling larval trematodes to use in experimental infections. Our goals were to identify two dyes that label larval trematodes belonging to the species Maritrema novaezealandensis and Coitocaecum parvum, determine if the dyes influence survival and infectivity of larval trematodes and/or host mortality, and if larval trematodes l...

The potential effect of larval condition on adult immunity in holometabolous insects is rarely considered. We show here that larval food composition can impact adult immunity independent from effects on general condition of the animal. Rather, our data indicate a plastic allocation of resources to immunity in high-protein environments. Specifically, we found that increasing the nutritional yeas...

Costelytra giveni is a serious pasture pest in New Zealand and accurate estimates of population densities are important to inform control measures. This species generally has one-year life cycle so populations should either remain stable after eggs have hatched or decline due larval mortality. Larval counts were obtained using simple, standard widely used sampling method from series soil cores ...

We conducted a transplant study in which embryonic southern toads (Bufo terrestris) were held in a site polluted with coal ash (site AB; containing As, Cd, Cr, Cu, Se, and other elements) and a reference site (site R) through hatching and early larval development. To examine the remainder of the larval period, surviving larvae in AB were then transplanted to R and back-transplanted to AB, where...

in the course of study on larval parasitoids of carob moth, ectomyelois ceratoniae zeller (lep.: pyralidae), an hyperparasitoid wasp, pachycrepoideus vindemmiae rondani, was collected from pupae of apanteles sp. (hym.: braconidae). the latter species is the larval parasitoid of the carob moth. the p. vindemmiae belongs to the family pteromalidae and is a new record for iran insect fauna.

In the present study, norepinephrine (NE), epinephrine (E), dopamine (DA) and 5-hydroxy-tryptamine (5HT) have been quantified by high performance liquid chromatography (HPLC) in Pecten maximus during larval and post-larval development. With average values ranging from 2 to 5 pg μg of protein, NE remained low through the whole larval life, while epinephrine (E) was undetected. DA and 5HT were th...

Changes to larval fish assemblages may have far reaching ecological impacts. Correlations between habitat modification, contamination and marine larval fish communities have rarely been assessed in situ. We investigated links between the large-scale distribution of stressors and larval fish assemblages in estuarine environments. Larval fish communities were sampled using a benthic sled within t...