Studies On The Biology And The Resource Evaluation Of Neochauliodes Sparsus In Mount Tai

Neochauliodes sparsus (Liu et Yang) belongs to Neochauliodes, Corydalidae, Megaloptera. It is a dominant population of Megaloptera in mount Tai, which is widely distributed in the stream and has a strong ability to adapt for different environments.The larvae of Neochauliodes sparsus whose popular name is pashachong praised as"insectile ginseng"is a rare insects for food and medicinal. It is both a delicacy on the feast and a treasure for nourishing.In this paper, the biology characteristics and the larvae resource components of Neochauliodes sparsus were studied by reseaching two kinds of Corydalidae Insect resources based on investigation, as astheoretical and experimental evidence for future studies on protection and exploitation of Neochauliodes sparsus resource.1. By investigating insect resources of Corydalidae in mount Tai, identifying and statistical analysis, two species were collected. They were Neochauliodes sparsus and Protoheres xanthodes , which are belong to Chauliodinae and Corydalinae respectively.2. Neochauliodes sparsus is a holometabolism insect, experiencing egg, larvae, pupae and adult. Male. Body length 20～58 mm; forewing length 33～40 mm, hindwing length 29～37 mm; Famale Body length 20～60 mm; forewing length 37～45 mm, hindwing length 33～40mm. Head yellowish brown; Prothorax yellowish brown; Pronotum mostly pale brown, Mesothorax and metathorax pale brown; Wings hyaline, tinged pale grayish brown, sparsely marked with darker brown; Abdomen blackish brown. The distinction between males and females are: the antenna of males are cirrated, while females was .serrated Egg ivory, oblong, top with 1 fine axon eggs. The Larvae body is flat, head and chest brown, Back light black, abdominal brown and black, Abdominal tracheal gills eight against . The pupal bending to abdominal with a"C"has bristles in surface. The head orange yellow, after both sides have wings bud, chest, abdomen is shallow brown or orange.3. It occours one genetation in year in mount Tai and overwinters as larvae in water. From the middle and last ten day of June, a few old larvae climb to the shore from the water, and make pupa chamber below the sand or rocks. Between July and August, lots of larvae pupated intensively. Adult eclosion happened one week later. Adult began to mate and oviposit on leaves and rocks in the stream or shoresidea a day later. One week later, the eggs hatched and larvae entered the water. After September 11, the number of adults significantly reduced. During the middle and last ten day of September , overwintering larvae began to gathered in the center of the stream center, no longer climbed to the shore and pupated.4. Protein, amino acid, fat, sugar and ash content were 67.69%, 56.02%, 10.4%, 1.59% and 7.05% of dry samples respectively. Furthermore, sampled insects contained 18 essential amino acids, including 8 human essential amino acids, and essential amino acids comprised 45.32% of the total amino acids. The ratio of essential to nonessential amino acids was 82.89%. TRY was the first limiting amino acid in larvae protein. In addition, larvae contained abundant minerals and trace elements, including Ca, P, Fe and Zn.