The Journal of Zoology Studies

11-16

Authors: N.M.Soomro, M.H.Soomro, J.I.Chandio, T.J. Ursani, S. Malik, Z.A.Palh, K.H.Lashari

The feeding response of predators on eggs and nymphal densities of white-backed plant hopper (WBPH) was studied. The results indicate that the number of eggs and nymphs of WBPH consumed by the mirid bug greatly increased as prey density increased. It was also concluded that Cyrtorhinus Lividipennis is a voracious predator on eggs and nymphs of Sogatellafurcifera compared to the predator Pardosa pseudoannulata.

23-26

Authors: Naveed Akhtar, Kausar Saeed, Shahroz Khan

Buner is a district of Malakand division. It lies between 34-09 and 34-43◦ N latitude and 72-10 and 72-47◦ E longitude. River Barandu is the largest river of the district. It flow in tehsil Daggar and then enters to tehsil Gagra. River Barandu is the most important water line as it connects with all major villages eventually falling into the river Indus at Kala Dhaka. In current study a total of 10 species were collected belonging to 3 orders and 4 families. These Species were Barilius pakistanicus, Triplophysa naziri, Tor putitora, Crossocheilus latius, Schizothorax plagiotomus, Channa gachua, Gara gotyla, Matacembelus armatus, Puntius sophore and Schistura punjabensis. The specie Glyptothorax punjabensis was not collected in current study which might be the result of increase anthropogenic activities in River Barandu. Protectiver measurements are required to save the fish fauna of River Barandu.

33-49

Authors: Sanjib Bose and Padmanabha Chakrabarti

The pituitary gland of Liza parsia (Hamilton, 1822) was of the cranio-leptobasic type and subdivided into three distinct zones innervated by the narrow and short strip of neurohypophysis. Different cell types were identified in the pituitary gland of L. parsia on the basis of their distribution and staining properties. The acidophilic lactotrophs or prolactin (PRL) cells and basophilic thyrotropic (TSH) cells stained with Mallory’s triple and Periodic Acid Schiff’s-Orange G (PAS-OG) and Aldehyde fuchsin (AF) were found in the rostral pars distalis (RPD) region. The PRL cells showed strong affinity to aniline blue. Between PRL cells and neurohypophysis (NH), adrenocorticotropic hormone secreting cells (ACTH) were found which gave faint purple colour (OG) with PAS-OG stain. The basophilic gonadotropic cells (GTH) and acidophilic somatotropic cells (STH) were distributed in the middle proximal pars distalis (PPD) region. The GTH cells were PAS, AF positive while STH cells were PAS and Acid Fuchsin positive. The melanocyte stimulating hormone secreting cells (MSH) were observed in the pars intermedia (PI) which were positively stained with PAS. No significant changes of the activities in all of the acidophilic cell types were observed throughout the year. However, The GTH and TSH cells reacted positively with PAS and exhibited both quantitative and qualitative variations during the ovarian cycle. During growth and pre-spawning period the GTH and TSH cells were characterized by homogeneous or granulated cytoplasm and recorded with maximum cellular diameters. The activity of GTH and TSH cells was reflected by low staining intensity as well as vacuolization of the cells during spawning period. During the post-spawning phase both the GTH and TSH cells stained weakly having atretic features. The substantial changes in the ovarian activity were correlated with the changes in the activity of the GTH and TSH cells of the pituitary gland in L. parsia.