Background: Microinjection was tested as a potentially powerful tool to introduce natural and anthropogenic pollutants directly into fish eggs to determine their toxicological impact on fish. With this technique, parental transfer of lipophilic contaminants may be mimicked. Here, we investigated the applicability of pollutant injection into the yolk of early zebrafish (Danio rerio) eggs with sp...

The reproductive and feeding biology of the lined seahorse, Hippocampus erectus, was studied in Chesapeake Bay. Seahorses are monogamous, and males incubate the eggs received from females in a closed brood pouch (= marsupium). Females do not play any parental care after mating. Total sex ratio and the operational sex ratio was strongly skewed toward females. Males and females had similar number...

The nematode parasite Huffmanela huffmani Moravec, 1987 (Trichosomoididae) infects swimbladders of fishes in the family Centrarchidae. Only fish collected from the upper San Marcos River (Texas) have been found infected with H. huffmani eggs with a prevalence of 90%. Hundreds of thousands of H. huffmani eggs have been observed in these fish but only a few specimens of adult worms have ever been...

Fish from lagoons in Northern Luzon, Philippines, have been shown experimentally to be intermediate hosts of Capillaria philippinensis. Eggs ingested by the fish hatch in the intestines and the larvae double in size in 3 weeks. When fed to monkeys, Mongolian gerbils and birds, the larvae develop into adults and reproduce. Fish from the lagoons or purchased from the market were fed to gerbils an...

In the waters surrounding Banco Chinchorro in the Mexican Caribbean are spawning and nursery areas for many types of fish. In this natural environment, as opposed to under controlled laboratory conditions, it is almost impossible to link an individual egg to the adult that laid it. This makes identifying the species of the eggs difficult. However, DNA barcodes have made this easier. In the pres...

eggs l A preliminary study showed that maximum enrichment of egg lipid with omega-3 polyunsaturated fatty acids (LCPUFA) had not occurred after about 5 days on dietary oil regimens. When cod liver oil, canola oil or linseed oil was added at 7% to layer diets for 12 weeks, production parameters were usually better than on the commercial layer diet; e g g w e i g h t was normally higher on the oi...

Marine protected areas (MPAs) could be useful as fisheries management tools for the exportation of pelagic eggs, larvae and adult fish. A decreasing gradient of fish biomass across MPAs boundary may indicate export. We determine whether gradients of decreasing biomass of fish assemblage occurred in Tabarca Marine Reserve over two habitats with different continuity across the boundaries, to test...

This study aimed to provide information about the reproductive biology of moonlight gourami (Trichopodus microlepsis) distributed in U Minh National Parks. Fish samples were collected monthly from January October 2019 at two locations: Ha (UMH, Ca Mau, n=462) and Thuong (UMT, Kien Giang, n=635). Results showed that maturation-stage ratios females similar between fish populations. Mature (with s...

The objective of this research was to assess the impact of a nutrition education intervention on intake of total ω-3 fatty acids (n-3 FA) in heart patients. The intervention design was a randomized trial comparing 2 interventions: decisional balance (DB) and no decisional balance (NDB). The outcome measures were total dietary n-3 FA intake and food sources. Intakes were measured using an n-3 FA...