The solitary larval ectoparasitoid, Syngaster lepidus Brull e, parasitizes the cryptic larvae of two wood-boring beetles, Phoracantha recurva Newman and Phoracantha semipunctata F. The objective of this study was to determine how the female parasitoids allocated the sex of progeny when presented with larval hosts of uniform size classes. Host size was directly correlated with age of the Phoraca...

No-effect concentration as well as safe concentration of mercury was evaluated by exposing Perna viridis and Mugil cephalus to 24-hour static renewal bioassay for 96-hours. The 96-hour LC50 value was 75 and 129 μg/l Hg for Mugil cephalus and Perna viridis. Juvenile mullets were more sensitive than green mussel. The safe concentration calculated were 0.75 and 1.29 μg/l Hg. The no-effect concentr...

This study describes at ultrastructural level the germ cells in the testis of matrinxã (Brycon cephalus) raised in captivity. The specimens 'matrinxã' were maintained in four breeding tanks of 200 m(2), at the Aquaculture Research Center at Vale do Ribeira-CEPAR, from Fishery Institute, in Pariquera-Açu City, São Paulo, Brazil. The samples were collected from March 1994 to February 1996. The te...

Bu çalışmanın amacı, Düzağaç-Akdeğirmen Baraj Gölü (Afyonkarahisar)’ndeki Squalius recurvirostris'in dactylogyrid parazit türlerini ve bu türlerin anatomik, morfolojik, metrik ekolojik özelliklerini tanımlamaktır. Araştırma metodolojisi kapsamında, recurvirostris örneklerinin deri yüzeyi, yüzgeç solungaçları parazitler bakımından incelendi. Dactylogyrus sp. bazıları etil alkol ortamında muhafaz...

In this study, a detailed chromosome analysis of the endemic Cappadocian Chub, Squalius cappadocicus in Melendiz Stream (Aksaray) was performed. The standard Giemsa staining, C-banding (CBG and CB-DAPI), Ag-NOR technique were applied. diploid number 50; its karyotype formula 14M + 16Sm 10St 10A. Heteromorphic sex chromosomes weren’t detected studied specimens. all chromosomal arms (NF) 90. C-ba...

In a study of the fishes Lake Hazar, and Tigris, Euphrates Kueik rivers were recorded four species Squalius belonging to Squalis cephalus-group found: The western drainage River (Tohma Stream) population was identified as S. seyhanensis, northern drainages semae, populations berak. comparison 28 metric, 9 meristic parameters morphological characters showed that Hazar upper Tigris are distinct b...

The chub is a freshwater fish of the family Cyprinidae, which is widely distributed throughout Europe. Prior to 2001 there were no reports of chub being present in Ireland. In 2001 and again in 2004 it was reported that an angler had caught chub in a section of the River Inny. On neither occasion were live specimens retained for authentication. In 2005 a number of live, angler-caught chub from ...

A bird-parasitic fly, Carnus orientalis Maa, 1968, is recorded for the first time from Japan, and it is taxonomically reexamined on the basis of specimens collected in Okinawa Prefecture. Adult flies were found from nestlings of Ryukyu scops owl (Otus elegans Cassin, 1852), which is a new host for C. orientalis. Bionomic remarks regarding C. orientalis are presented, and akey to the world speci...

The aim of this paper is to offer some new information on the life and work of Matthias Flacius Illiricus the Younger, especially concerning his activity as a medical doctor and university professor. According to our present knowledge, he published 17 of his writings during his lifetime. Matthias Flacius the Younger was born on September 12, 1547 in Braunschweig. His mother Elisabeth had 11 mor...