EFFECTS OF SALINITY AND TEMPERATURE ON THE DEVELOPMENT OF EGGS IN THE TUBE BUILDING AMPHIPOD COROPHIUM TRIAENONYX STEBBING

Volume: 150Start Page: 286End Page: 29

STUDIES ON THE TUBE-BUILDING AMPHIPOD COROPHIUM TRIAENONYX STEBBING FROM VISAKHAPATNAM HARBOR: EFFECT OF SALINITY AND TEMPERATURE

Volume: 144Start Page: 503End Page: 51

PORROCAECUM WALLAGUS N. SP. (NEMATODA : HETEROCHEILIDAE) FROM THE INTESTINE OF FRESHWATER CATFISH, WALLAGOATTU(BLOCH AND SCHINEIDER)

The present paper describes a new species of anematode of the family Heterocheilidae Raillietet Henry, 1915 from the intestine offreshwater catfish, Wallago atau (Bloch-Schneider)

A new species of Pinnotheres Latreille (Decapoda: Brachyura) from Visakhapatnam coast of Bay of Bengal, Andhra Pradesh

Volume: 86Start Page: 217End Page: 22

EMBRYOLOGICAL DEVELOPMENT IN ORCHESTIA PLATENSIS KROYER (CRUSTACEA: AMPHIPODA)

In O. platensis, the egg size is found to varyin accordance with the stage of development. With few exceptions, all the eggs in a single brood-pouch are in the same stage of development. In brief, the entire development can be divided into eight stages. The young juveniles range between 1.3 mm and 1.6 mm in length at the time of hatching

HISTOCHEMICAL OBSERVATIONS ON THE VITELLOGENESIS IN THE MARINE CRAB, PORTUNUS SANGUINOLENTUS (CRUSTACEA:BRACHYURA)

Histochemical observations of Ooplasm and yolk granules in different stages of oocyte maturation in the ovary are made in the marine crab, Psanguinolenius. Four principal stages of oocytes are observed. The first stage of oocyte possesses a big nucleus and the Ooplasm shows basophilic nature. In second stage oocyte perinuclear ring is formed and the vitellogenesis commences with the accumulation of glycogen and RNA. The third and fourth stage oocytes are characterised by the presence of carbohydrate-protein lipid bodies, The chemical nature of the follicle cells is also studied and comments are made on their possible role in vitellogenesis. Based on the histochemical nature of oocytes and follicle cells, an autoheterosynthetic mode of yolk formation is proposed in this crab

HISTOLOGICAL AND CYTOLOGICAL STUDIES ON OOCYTE DEVELOPMENT OF THE LARVIVOROUS FISH, APLOCHEILUS PANCHAX HAMILTON AND BUCHANAN

Histological and cytological observations of oocyte development in the lesser top minnow, Aplocheilus panchax were described Various stages of developing oocytes of A. panchax also shown. The development of oocytes were classified into six stages according to the histological characters. First growth phase with two stages and three stages in second growth phase. Yolk bodies make their appearance from the beginning of second growth phase. Histochemical studies show that three types of yolk granules are found during vitellogenesis. Lipid yolk found as lipid doplets followed by protein yolk granules. the third type of inclusions are the intravesicular yolk, carbohydrate yolk which form the peripheral cytoplasm after the lipid protein yolk started to accumulate. &nbsp