The present study examined the effect of chitosan (Ch) and combination of chitosan and Thymus vulgaris essential oil (Ch+T) on the quality and shelf life of butterfly-shaped rainbow trout stored under refrigerated condition (5 ± 1°C) for 15 days. The treatments in the present study were Ch (chitosan: 2% w/v) and Ch+T (chitosan: 2% w/v and Thymus vulgaris essential oil: 1% w/v). The shelf life of the samples were determined using microbiological (total psychrotrophic count), chemical—pH, thiobarbituric acid (TBA), and total volatile basic nitrogen (TVB-N)—and textural analyses. Results showed that total psychrotrophic count decreased significantly (p < 0.05) using Ch+T coating during the entire period of storage. The treatment Ch+T resulted in lower pH, TBA, and TVB-N values in comparison with the other samples. Based mainly on our data, Ch+T treatment extended the product's shelf life by approximately 6 days in comparison with the uncoated control samples.

The present study investigated the age, growth and reproduction of G rufa by regular monthly collections throughout one year from September 2007 to August 2008 in the Kangir River (Western Iran). Based on scale readings, the maximum ages of the population observed were 5⁺ years, both sexes growing allometrically (b=2.90 (<?); b=2.92 ($)). The overall sex ratio was balanced, but males were predominant in smaller sizes, and females in larger sizes. Monthly examination of the GSI indicated that the reproduction of G rufa in the river occurred around April-May, with the highest average value of 4.21 for males in April and of 7.85 for females in May. Absolute fecundity varied from a minimum of 1,680 eggs for age 2 to a maximum of 13,927 eggs for age 5⁺. The absolute fecundity and egg diameter to fish size (length and weight) were positively correlated. The individuals studied here are on average smaller and have a lower weight than individuals studied in springs in southern Iran. The difference is explained by the severe ecological conditions in the river ecosystem, causing a lower growth rate and higher natural selection.

Chamanara V, Kamrani E, Zahirinia M, Máñez KS. 2016. Short Communication: Fishing inside Qeshm Island’s MPA, A tortuous approach. Nusantara Bioscience 8: 169-173. Incremental pressure of population growth in coastal areas has led to loss in many mangrove areas. Although these areas are fish nursery grounds and are very important in stock assessments, there is no accurate and up-to-date available data about them. In this research, the catch data in the Qeshm Island Marine Protected Area (MPA) of Iran was investigated using 11 stake nets. Totally, 81 specimens belonging to 69 genera and 63 families were caught, which majority of them were discarded. The commercial fish were young which were mostly smaller than LM50. In case of White Pomfret as well, only 15.3% of the caught individuals were in the legal catch size. Hence, this catch composition would be a potential threat to fish stocks. The major numerical and weight based specimens were Dussumieria acuta (10.05%) and Arius maculatus (5.9%), respectively. Containing 7 species, the Clupeidae was the most abundant family in the catch composition. Eventually, total annual catch by abovementioned stake nets within the mangrove forests in the Qeshm Island marine protected area was estimated to be 186.77-188.75 tonnes, approximately.

Increasingly burden of inhabitants growing in coastlines has led to damage in various mangrove expanses. Though these regions play as fish nursery grounds and are actual vital in stock assessments, there is no precise and state-of-the-art accessible information about them. Herein the catch records in the Qeshm island marine protected area (MPA) was studied by means of 11 stake-nets. Thoroughly, 81 specimens of 69 genera and 63 families were caught, which the main stream of them were discards. The salable fish were undeveloped which were frequently undersized in comparison with LM50. For Pampus argenteus as well, lone 15.3% of the caught those remained in the permissible catch size. Henceforward, this catch conformation would be there an impending hazard to fish stocks. The chief relative abundance and weight based specimens were Dussumieria acuta (10.05%) and Arius maculatus (5.9%), respectively. Encompassing seven species, the Clupeidae was the utmost rich family in the catch conformation. Ultimately, overall once yearly catch by aforementioned stake-nets surrounded by the mangrove woodlands in the Qeshm Island marine protected area was appraised to be 186.77-188.75 tonnes, approximately.