Volume 88, Issue 6
December 1979, pages 385-447
pp 385-389 December 1979
Changes in haematological indices like haemoglobin, iron, red blood corpuscles and white blood corpuscles were studied inCalotes versicolor during single and multiple type of helminth infection and single and multiple organ infection. The haemoglobin content, iron content and total count of RBCs decreased during helminth infection, whereas the total count of WBCs increased.
pp 391-396 December 1979
The influence of different concentrations of SevinR (1-naphthyl-n-methyl carbamate) a carbamate, was experimented on population ofPontoscolex corethrurus under laboratory conditions. The survivability, activity and fecundity of the worms are greatly influenced by the residue concentrations. The concentrations upto a level of 100 ppm favours the life activities of individuals whereas beyond this level the residual effect showed an adverse effect on the population.
pp 397-409 December 1979
Variations in fat content, glycogen and calorific values for meat content were studied inCrassostrea virginica (Gmelin) from Mississippi Sound with reference to sex and size during four different seasons of the year. Lean (October) oysters were characterised by lower glycogen, greater percentage of hydrocarbons, and sterols. Fat (February) oysters were characterised by higher glycogen, phospholipid, and triglyceride. There were size- and sex-related variations in the calorie content of the meat of oyster in all the months tested. In April the oysters had more calories. The free sterol fraction of oyster fat, yielded the highest calorific energies. The phospholipids from the lean oyster yielded more calories than those from fat oysters. The degree of unsaturation of the lipid class was believed to cause these variations in the calorie content of oysters.
pp 411-419 December 1979
Eight species of freshwater oligochaetes,Aeolosoma hemprichi EhrenbergNais communis Piguet,Nais variabilis Piguet,Stylaria fossularis Leidy,Aulophorus furcatus (Muller),Pristina longiseta longiseta Ehrenberg,Tubifex tubifex Muller, andLimnodrilus hoffmeisteri Claparede are new to Kashmir, India.
pp 421-424 December 1979
An examination of twelve specimens of mongoose from Visakhapatnam District yielded fourteen cysts with twoParagonimus compactus in each cyst from two hosts, and several specimens of a new species ofEuparadistomum (family: Dicrocoeliidae).E. herpestesi n.sp., differs from the hitherto known species in the ratio of testes to ventral sucker and the shape of ovary. There is a characteristic dorsal chamber of the receptaculum seminis which can be seen very clearly in whole mounts also.
pp 425-432 December 1979
Food intake, growth and conversion efficiency of two larvivorous fishes have been studied by supplying different proportions of first instarCulex fatigans larvae andTubifex tubifex worms. The worms inhibit the preferential feeding on mosquito larvae byGambusia affinis andPoecilia reticulata. The reduction is more marked inG. affinis than inP. reticulata. Growth and conversion efficiency ofP. reticulata surpassed the values observed forG. affinis indicating that the mosquito larvae are better utilised byP. reticulata than byG. affinis.
pp 433-440 December 1979
Four new species of the genusIotonchus, viz.,I. nayari, I. kherai, I. khani andI. heynsi are described.I. nayari comes close toI. risoceiae but differs in having shorter body and longer spicules compared to body length.I. kherai differs fromI. indicus in body size, shape and size of buccal cavity and presence of males and fromI. risoceiae in the shape of buccal cavity and subventral opening of caudal glands.I. khani differs fromI. chantaburensis in having shorter tail, poorly developed caudal glands and spinneret and absence of distinct valve between oviduct and uterus.I. heynsi differs fromI. longicaudatus by having an indistinct terminal caudal gland opening, non-cuticularised vagina and absence of sphincter at oviduct-uterus junction and fromI. trichurus by the size and anterior position of dorsal tooth. A key to Indian species of the genusIotonchus is provided.
pp 441-447 December 1979
In the light of the present authors’ work on subfamily Ostreinae from the Cretaceous of India, it was felt desirable that the two informal groups non-incubatory and incubatory genera of Stenzel in this Subfamily, be raised to the status of tribes as Crassostreini and Ostreini respectively on par with tribe Flemingostreini Stenzel. Also two new non-incubatory generaCussetostrea andSoleniscostrea are proposed here based on the type species asCrassostrea cusseta Sohl and Kauffman andCrassostrea soleniscus (Meek) respectively.