Ultrastructural Study of the Aphanius dispar (Rüppell 1828)(Pisces: Cyprinodontidae) liver (original) (raw)
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IUFS Journal of Biology, 2010
Histology offers a powerful tool in the study of detailed structures of different tissues in fishes. It is used for sex verification, identifying stages of development, presence of parasites, tumors diagnosis, other abnormalities and changes in the arrangement of tissue layers including the digestive tract. In this study, not having found any existing report, the digestive tract histology of the Persian tooth-carp, Aphanius persicus (Jenkins, 1910), was investigated. The dentition comprised canine-like teeth in one row with sharp tips. Esophagus consisted of small portion between pharynx and stomach. Stomach showed an enlargement and the intestine is relatively short. The mucosa of total digestive tube consisted of simple columnar cells and numerous goblet cells. The liver is composed of parenchymal cells and lattice fibers whose function is to support the former. Our data showed this fish is heterodont, omnivores with no secretory stomach.
Monitoring of morphological parameters of Cyprinidae liver
Ukrainian Journal of Ecology, 2019
The method of biomonitoring of natural reservoirs by diagnosing early violations in the most sensitive components of hydrobiological groups has been proved. Morphometric parameters of the liver of the family Cyprinidae fish are used as biotest-system for ecological analysis.Taking into account morphometric indexes of fish internal parenchymatous organs, the possibility of predicting the toxic substances influence on the aboriginal ichthyofauna state, has been determined. It has been established that protoplasmic and hemolytic toxicants violate cellular metabolism, causing dystrophy of liver cells in fish. Morphoanalysis of the parameters of the liver of the family Cyprinidae fish, as the most widespread object of the ichthyofauna, is used as the basis for indicating in the system of biomonitoring of the water environment quality to the action of external factors and timely prevention of existing danger.The results obtained serve as the basis for the development of environmental meas...
The life-history traits of Aphanius danfordii in Hirfanlı Reservoir were studied on the basis of 2252 specimens caught between April 2008 and April 2009. Maximum age was determined as five years for both sexes. The overall sex ratio of males to females was 1 : 1.21; however, this ratio varied by age and season. Mean total length at age data derived from scale readings were used to estimate growth. The von Bertalanffy growth parameters were: L∞ = 126.63 mm, K = −0.09, t0 = 2.35 for females; and L∞ = 61.2 mm, K = −0.19, t0 = 2.76 for males. The gonadosomatic index (GSI) values indicated spawning to be from May to September. Absolute fecundity varied from a minimum of 143 eggs for age one to a maximum of 698 eggs for age five. Relationships between fecundity–length and fecundity–weight were described by the equations: F = 0.0002 TL3.3222 and F = 36.032 W1.0053, respectively. The equation of the relation between absolute fecundity and age was F = 25.372 t1.2343.
Contrbtion to the biology of Zagros tooth-carp, Aphanius vladykovi (Cyprinodontidae) in central Iran
Environmental biology of fishes, 2004
We studied some aspects of the biology of the Zagros tooth-carp, Aphanius vladykovi, an endemic and poorly known species from Chahar-Mahall-va-Bakhtiari province in central Iran, by regular monthly collections and direct observation in aquaria during a full year. Individuals from Modar-Dokhtar spring of Gandoman region were collected; some were preserved in formalin and some were transferred to aquaria alive. Standard biometric and biological measurements were carried out. The stomach content consisted mostly of freshwater crustacean and the RLG was 0.7, on average, suggesting a carnivorous habit. The eggs had an average diameter of 1 mm (±0.1) and the average absolute and relative fecundity was 415 (±169) and 110 (±25), respectively. The gonadosomatic ratio and ovary condition suggested that the reproductive season of the species was between late March and June with a peak in early April. The species is euryhaline and eurythermal and prefers neutral to basic waters. It is usually found in well-oxygenated waters, but is tolerant to hypoxia as well.
Iranian Journal of Fisheries Sciences
The scanning electron microscope was used to investigate the ultrastructures of the egg membrane surface (unfertilized egg) of an endemic cyprinid fish, Cyprinion tenuiradius Heckel, 1849. The eggs of this species were almost circular in shape, had a smooth surface and one type II micropyle consisting of the flat pit and a long canal in the animal polar region. The micropyle region was not flat, micropyle was circular or oval in shape and the micropyle canal was located in its center. Round or oval accessory pores were also observed in the pit around of the micropylar canal. The surface of zona radiata was smooth with a uniform distribution of almost round pores with lips.
2017
Phenotypic variations in fish body and scale shape were investigated among the three populations of Aphanius dispar (Ruppell, 1829)in Southern Iran through the use of landmark-based geometric morphometric analyses. This species is widely distributed in the region, and therefore, considerable morphological variations exist among the geographically allopatric populations. Based on the Principle Component Analysis (PCA), variation in body shape of the females is prominently related to the dorsal fin region, while in the males it is related to the dorsal fin and caudal peduncle. Moreover, the shape variations in the scales are obviously linked to the tip of anterior portion of the scales, and the left and right boundaries between anterior and posterior regions of the scales. The lateral sides of the fish scales in site I are concave, while they are laterally convex in sites II and III. The observed variation seen in the fish body shape and scales among the three studied sites are probab...