Sex-changing fish: caused by contamination or nature?

Behavioral and Personality Changes Caused by Toxoplasma: Imagination or Reality

Introduction: This note addresses the scientific study of behavioral changes caused by Toxoplasma. About a third of the world's population is infected with the chronic form of the parasite, which is usually asymptomatic and causes severe symptoms only in the presence of the parasite in the eye and nervous system. The study of behavioral changes caused by this parasite has begun since the 1980s ...

Fish kill caused by aluminium and iron contamination in a natural pond used for fish rearing: a case report

Contamination of Pansky Pond, in March 2013, with 119 mg/l aluminium, and 87 mg/l iron by acidic (pH 3.17) inflow from a nearby quarry caused fish die-off, while exhibiting symptoms of suffocation. Transformation of soluble forms of aluminium and iron into insoluble forms occurred on fish gill where the content of aluminium and iron was 100-fold and 12-fold, respectively, that found in control ...

Sex differences in neuromuscular androgen receptor expression and sociosexual behavior in a sex changing fish

Androgen signaling, via receptor binding, is critical for regulating the physiological and morphological foundations of male-typical reproductive behavior in vertebrates. Muscles essential for male courtship behavior and copulation are highly sensitive to androgens. Differences in the distribution and density of the androgen receptor (AR) are important for maintaining dimorphic musculature and ...

Changing Nature of Warfare

Large hepatic abscess caused by fish bone

S perforation by ingested fish bone resulting in hepatic abscess is very rare with few case reports in the literature. They present with nonspecific features of an acute abdomen and with less severe clinical features than those perforations present in other parts of the gastrointestinal tract (GIT). The clinical diagnosis is challenging without a definitive history of fish bone ingestion. The m...