Fish as natural predators of mosquito larvae is a way controlling biologically that does not pose risk to the health organisms and environmental damage overcoming problem resistance chemical larvacide. One fish tested in study was rosy barb (Pethia conchonius) lemon cichlid (Labidochromis caeruleus). Objectives: To analyzed difference predation ability male female larvae. Methods: This an exper...

ABSTRACT This study was undertaken to examine the histopathological effects of CCl(4) on rosy barbs and amphioxus with an aim to compare the homology between rosy barb liver and amphioxus digestive caecum. It was found that the 96 h LC(50) values were 23.9 +/- 4 mg/L and 18.9 +/- 2 mg/L for rosy barbs and amphioxus, respectively. Histological examinations showed that exposure to sublethal CCl(4...

In the course of a revision of Haemonchus Cobb, 1898 (Nematoda), commonly referred to as large stomach worms, significant new morphological information was discovered that allows the recognition of 2 species believed for more than 50 yr to be synonymous. Both species, Haemonchus mitchelli Le Roux, 1929, from the eland Taurotragus oryx and other African ruminants and H. okapiae van den Berghe, 1...

The purpose of this study was to determine the morphometric and meristic characteristics, growth Signal barb fish in Tasik river. method used research is a survey method. Morphometric characteristics Bodyweight (BW) ranges from 4-73 gr, Total Length (TL), Standard 6.3-15.5 mm (SL), Head (HL) 1.8-2.5, Snout (SL) 0.5, Dorsal Fin Height (DFH) 2.3, (DFL) 3-7, Eye Diameter (EM) 0.8, Tail Trunk (TTH)...

We present the first explicit theory of the growth of feather shape, defined as the outline of a pennaceous feather vane. Based on a reanalysis of data from the literature, we propose that the absolute growth rate of the barbs and rachis ridges, not the vertical growth rate, is uniform throughout the follicle. The growth of feathers is simulated with a mathematical model based on six growth par...

We describe a narrow hybrid zone between the mottled sculpin (Cottus b. bairdi) and the Blue Ridge sculpin (C. caeruleomentum). Seven characters (dorsal fin rays, pectoral fin rays, caudal base band condition, male spawning coloration, and one frequency and two fixed allozyme differences) distinguish the two taxa in the hybrid zone. C. caeruleomentum and C. b. bairdi diverged in these character...

A series of new silver(i) 5,5-diethylbarbiturate (barb) complexes with the formulas [Ag2(μ-barb)2(PPh3)2] (1), [Ag(barb)(PPh2Cy)] (2), [Ag(barb)(PPhCy2)] (3) and [Ag(barb)(PCy3)] (4) (PPh3 = triphenylphosphine, PPh2Cy = diphenylcyclohexylphosphine, PPhCy2 = dicyclohexylphenylphosphine and PCy3 = tricyclohexylphosphine) were synthesized and fully characterized by elemental analysis, IR, NMR, ESI...

Comparative study of completed down feathers from seven of the major tracts of newly-hatched Silver Campine chicks reveals tract-specific differences in the total length of the primary group of barbs and in the length of their barbule-free tips. Two classes of barbs can be distinguished on the basis of overall length in feathers of any one of the tracts: (a) those barbs that form from the first...

A new hybrid approach to modeling and control design for a biologically inspired unmanned underwater vehicle using pectoral fin control force generation is presented in this paper. The full dynamics of the proposed vehicle are modeled and the forces produced by the fins are computed using computational fluid dynamics. The stability of motion in the dive plane is analyzed and a proportional-inte...