The reproductive behaviour of the kelp bass Paralabrax clathratus was studied on Santa Catalina Island, California, U.S.A. from April 2000 to September 2002. Adults formed aggregations of three to > 200 individuals, and spawning occurred within subgroups of three to 23 individuals that contained a single female. The gonado-somatic index (IG) of collected ripe males (mean 1⁄4 5 8%, range 1⁄4 0 5...

This study’s objective was to explore some of the annual Prussian carp’s (Carassius gibelio) biological characteristics (sex ratio, length–weight and gonado somatic index - GSI) in Kopački Rit Nature Park Croatia. The carp is an invasive fish species originated from Asia, which became widely distributed throughout Europe believed be responsible for a decline number indigenous fish, invertebrate...

During embryonic life, hematopoiesis occurs first in the yolk sac, followed by the aorto-gonado-mesonephric region, the fetal liver, and the bone marrow. The possibility of hematopoiesis in other embryonic sites has been suspected for a long time. With the use of different methodologies (transgenic mice, electron microscopy, laser capture microdissection, organ culture, and cross-transplant exp...

Key-words: red swamp crayfish, Procambarus clarkii, reproduction, population structure and population dynamics, invasive species Understanding population dynamics and regulation is fundamental for predicting establishment and spread of invasive alien species. In addition, the population biology of invasive alien species offers an opportunity to study basic ecological processes. In this context,...

The ultrastructure of testicular cells of adult male African clawed frogs (Xenopus laevis) exposed to either estradiol (0.1 microg/L) or 2-chloro-4-ethylamino-6-isopropyl-amino-s-triazine (atrazine; 10 or 100 microg/L) was examined by electron microscopy and compared to plasma concentrations of the steroid hormones, testosterone (T) and estradiol (E2), testicular aromatase activity and gonad gr...

In the present study, the female Clarias batrachus, held under long photoperiod (13L:11D), were exposed to high water temperature either constantly (24 h) and/or in form of thermopulse of 6 h and 12 h durations, separately, at different times of the day/night cycle for six weeks during the early post-spawning and late post-spawning phases of its reproductive cycle. The effects of high water tem...

This study examined the effect of underground water on reproductionand growth-related hormones in blue gourami males under non-reproductive and reproductive conditions. An increase in the percentage of males building nests under the highest percentage of underground water were compared to fish that maintained a lower percentage of underground water in the first two days. The % Gonado-somatic in...

Allogeneic hematopoietic stem cell transplantation is mainly indicated in bone marrow dysfunction related to blood diseases, but also in some rare diseases (adrenoleucodystrophy, mitochondrial neurogastrointestinal encephalomyopathy or MNGIE...). After decades, this treatment has proven to be efficient at the cost of numerous early and delayed side effects such as infection, graft-versus-host d...

Palinustus waguensis Kubo, 1963, is the deep-sea Japanese blunthorn lobster belonging to Family Palinuridae. It a species that has been rarely reported, living in rocky habitats on deep-reef slopes at depth of 100–250 m. An estimated catch 100 kg P. consisting 113 males, 54 females, and 23 berried lobsters were collected during first fortnight January 2019 from multi-day shrimp trawls operating...

Aquaculture activities cannot be separated from obstacles that can lead to failure of aquaculture, including the presence microplastics. Microplastic polystyrene (styrofoam) is a type plastic commonly found in aquatic organisms (35%). Microplastics fish cause hormonal disturbances and high vacuolation gonads which apoptosis gonadal cells. This study aimed determine effect microplastics exposure...