ABSTRACT
Abstract:Freshwater crab, Sodhiana iranica, is an endemic gecarcinucid crab that has been recently reported from Southern Iran. This research examined some reproductive aspects of S. iranica from Eelood freshwater spring, Southern Iran. Crabs were haphazardly sampled from April 2012 to April 2013, on a bimonthly basis. Measurements of Gonado-Somatic Index (GSI), Hepato-Somatic Index (HSI), oocyte diameter, and other aspects such as carapace width (CW) and total body weight (TW) were made in the captured specimens. Results showed a single seasonal reproductive cycle. Maturation and spawning occurred from December 2012 to April 2013 during the study period. The peaks of HSI were observed in April 2012 and February 2013. The oocyte diameter showed its most significant increase between August 2012 and February 2013. Considering the single seasonal breeding of S. iranica, a correct management, during the reproductive cycle, is necessary to support a healthy stock of this crab. Rev. Biol. Trop. 65 (1): 365-373. Epub 2017 March 01.
ResumenEl cangrejo agua dulce Sodhiana iranica es un cangrejo gecarcinucido que ha sido recientemente encontrado en el sur de Irán. Este trabajo examina algunos aspectos de la reproducción del cangrejo de agua dulce S. Iranica en el manantial Eelood del sur de Irán. Los cangrejos se muestrearon al azar entre abril 2012 y abril 2013 cada dos meses. Las mediciones del índice gonadosomático, el hepatosomático (HSI), el diámetro de los ovocitos y las observaciones de las etapas de maduración de los especímenes capturados, revelaron un único ciclo reproductivo estacional. La maduración y el desove se produjeron entre Diciembre 2012 y Abril 2013. El pico del índice hepatosomático se observó en Abril 2012 y Febrero 2013, respectivamente, y resultó más significativo el incremento en la media del diámetro de los ovocitos, que se produjo entre Agosto 2012 y Febrero 2013. En este estudio, se encontró que S. iranica se reproduce una vez al año estacionalmente. Por lo anterior, la gestión correcta durante el ciclo reproductivo de esta especie es necesaria para mantener la naturaleza y salud del stock de cangrejo.
Subject(s)
Animals , Male , Female , Brachyura/physiology , Oocytes/physiology , Reproduction/physiology , Seasons , Sexual Maturation , Time Factors , Sex Factors , Fresh Water , IranABSTRACT
ABSTRACT 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.