Occurrence and distribution of larval and juvenile fish was investigated in nearshore waters of the southeastern Caspian Sea including the Gorgan Bay. Samples were collected during seven surveys using a fine mesh beach-seine in five sampling sites from July 2014 to June 2015. A total of 15500 individuals mostly juvenile were captured, representing 18 species from 8 families. Most juveniles belo...

The study of assemblages fish in their early phases estuaries is an essential approach to understanding the functioning these types ecosystems and role as nursery grounds for some marine species. main aim this was analyze ichthyoplankton assemblage Bons Sinais Estuary, specifically clarify use area by species socio-economic interest. This identified 22 larval taxa among families, genera, Gobiid...

We investigated the direct and indirect effects of elevated atmospheric CO(2) on freshwater container habitats and their larval mosquito occupants. We predicted that a doubling of atmospheric CO(2) would (1) alter the chemical properties of water in this system, (2) slow degradation of leaf litter, and (3) decrease larval growth of Aedes albopictus (Skuse) mosquitoes raised on that litter under...

small cabbage white butterfly, pieris rapae (l.) (l.) (lep.: pieridae) and diamondback moth, plutella xylostella (l.) (lep. plutellidae) are two of the most important insect pests of the family brassicaceae. use of resistant varieties is suitable management strategy for control of these pests. in order to study the population fluctuations of p. rapae and p. xylostella, eight cultivars of caulif...

The sunßower midge, Contarinia schulzi Gagné (Diptera: Cecidomyiidae), is a pest of cultivated sunßower (Helianthus annuus L.). Larval feeding can cause damage and yield loss to the sunßower head. Adult emergence is extended and larvae are well protected in the sunßower receptacle, making chemical control methods difÞcult and expensive. Sunßower midge enter sunßower Þelds at the edges but Þeldw...

The superior larval competitive ability of Aedes albopictus has been proposed to explain the recent displacement of Aedes aegyptiby the former species inparts of the southeastern U.S. Ae. aegypti persists, however, in sympatry with Ae. albopictus in urban areas of southern Louisiana, Florida, and Texas, and the impact of larval competition between these species has not been investigated at high...

Tuta absoluta (Meyrick, 1917) is a key tomato pest in South America and, recently, in Europe and Africa. To develop efficient control methods for this pest, adequate rearing protocols are desirable. As an alternative to tomato leaves (natural diet), we evaluated four artificial diets. Biological traits including larval and pupal viability and development time, pupal weight and deformations were...

Resistance to diamondback moth, Plutella xylostella (L.), has been a major criterion for selection in the crucifer breeding program at the New York State Agricultural Experiment Station. Two types of resistance have been identified and studied. Larval survival on normal wax genotypes (with the typical whitish bloom of cultivated Brassica) is about 50% of survival on susceptibles. Polar extracts...

Carnivorous plants allocate more resources to carnivorous structures under nutrient-limited conditions, and relative investment can also be influenced by animals (infauna) that live in association with these plants and feed on their prey. We investigated these effects within a population of the pitcher plant Cephalotus follicularis containing varying densities of larvae of the fly Badisis ambul...

A greater knowledge of the morphology and the development of the infective third larval stage of Neoaplectana bibionis Bovien, 1937, a parasite of arthropods, makes it possible to recognise the second larval stage and present a description of all the developmental stages in the life cycle of the species. Four larval stages can be recognised. L1 hatches from the egg. In a suitable host, when the...