The coastal waters off Tokoro, Okhotsk Sea have been characterized by a substantial decrease in primary production from spring to summer season which will repercussions on the maintenance of Japanese scallop Patinopecten yessoensis (Jay, 1857) culture. This study examined seasonal changes growth, condition and organ indices relation environmental conditions, compared sinking particulate organic...

The life history traits and gonad development of an endemic cyprinid fish, the spotted barb, Capoeta mandica (Bianco & Banarescu 1982), from southern Iran was investigated by regular monthly collections from February 2006 through January 2007 and on the basis of microscopic and macroscopic analyses. No information on the spawning characteristics of the fish are available to date. A total of 335...

Anisotremus scapularis is an important commercial species in Perú, being a prioritized for the development of its aquaculture. The aim study was to establish A. female reproductive cycle and strategy on marine coast Callao, through seasonal sampling wild specimens. specimen collection carried out between January 2019 December 2020. Eighty-one specimens were collected, biometric indices calculat...

  This study involves the investigation of Tinca tinca (L., 1758) living in Kapulukaya Reservoir in Turkey. It was observed that the fish reach sexual maturity at the age of III and the breeding period starts in May and ends in July. The mean monthly gonadosomatic indices varied from 1.38 ±0.06 (in October) to 8.01±1.03 (in May). According to monthly variations of the GSI, spawning of the tench...

The perchlorate anion--an oxidizer found in rockets, missiles, some ammunition, flares, airbags, and fireworks--occurs as a contaminant in ground and surface water in many parts of the United States. Its toxic effects include inhibition of thyroid hormone synthesis. To investigate its chronic toxicity, mosquitofish (Gambusia holbrooki) adults and fry were exposed to aqueous sodium perchlorate a...

Abstract The purpose of this study was to examine various lipid classes as well the protein content in rainbow trout ovaries. A total 80 samples Oncorhynchus mykiss (Walbaum 1792) were collected from Kokernag and Verinag hatcheries (Jammu Kashmir, India) between 2017 2019. mature stage female fish had highest gonadosomatic index (GSI) minimal GSI spent stage. Higher ovary reported during (36%),...

Reproductive status of Alburnus chalcoides adults from Anzali Wetland was investigated by histological examination of gonads, assessment of sex steroids (i.e. Progesterone (P), Estradiol-17ß (E2), Testosterone (T)) and reproductive indices (i.e. absolute fecundity, oocyte diameter, hepatosomatic index (%HSI) and gonadosomatic index (%GSI)). Totally, 42 females and 16 males were captured during ...

Market demand for scallops has considerably increased in recent decades. Although natural populations of are vulnerable, the queen scallop, Aequipecten opercularis, can represent a possible alternative to at-risk species. The aim this study was determine effect seawater parameters on commercial quality, biological indices and nutritional quality scallop A. opercularis 1900 L tanks ex situ condi...

This study was carried out to determine some reproductive characteristics of the fantail goldfish Carassius auratus females (standard length 69-224 mm. and total weight 21.1- 255.35 g.) from rearing ponds in Basrah province, Southern Iraq. Standard length, weight, gonad absolute fecundity, relative gonadosomatic index (GSI) egg diameter were determined October 2010 April 2011 77 females. Result...