This study was carried out to determine some biological characteristics including age, growth and somatic condition of Carasobarbus luteus and Capoeta trutta in the Turkish part of the Tigris River. The examined samples of C. luteus were distributed between II-IX years of age. The length-weigth relations of females and males were calculated as Log W =-4.7314 +3.0113 Log FL and Log W = -4.7631 +...

This study was performed to obtain information on the sex ratio, spawning period, and size at sexual maturity for fishery management of largehead hairtail Trichiurus japonicus in Korean waters. The overall ratio (female, F; male, M) 1:0.46 (n = 1274 females:589 males, 68.4% female) as fish increased length, proportion females increased. oocyte development pattern group-synchronous development, ...

The mola carplet, Amblypharyngodon (Hamilton, 1822) is the most common small indigenous freshwater fish species in Bangladesh. precise information addressing reproduction this including breeding peak, ovarian histology, morphometry, and sex ration nature still insufficient. A one yearlong filed survey different laboratory assays have been directed to disclose some key features of female A. from...

Cochicó belongs to “Encadenadas del Oeste” system of lakes being a typical water body the Pampas region. The most abundant fish species in this lake is pejerrey (Odontesthes bonariensis) valued due quality its flesh and as game fish. aim study was compare gonadal stages during two consecutive spawning seasons (August December) relation sexual steroids temperature lake. In general, development, ...

This study aimed to elucidate seasonal reproductive patterns by associating the immunolocalization of steroidogenic enzymes responsible for estrogen and androgen synthesis, cytochromes P450 aromatases (P450 arom), 17-hydroxylase/17,20-lyase (P450c17) respectively, as well redox partner NADPH cytochrome oxido-reductase (CPR) in male mud turtle (Kinosternon scorpioides). The animals were collecte...

Abstract We measured gonad size (diameter and circumference) by ultrasound used it as a metric to assign stage of maturity in Burbot Lota lota from Lake Roosevelt, Washington. collected paired tissue measurements monthly November 2017 March 2018 processed for histological analysis confirm maturity. diameter circumference ultrasound. also excised (i.e., true diameter) digital calipers measuring ...

Production of wedge clam (Donax trunculus) has experienced a widespread decrease. Environmental conditions have been postulated as an important agent though the effects on reproduction are poorly understood. We here review reproductive cycle and evaluate influence environmental in Galicia (NW Iberian coast). further contrast variability traits across distribution range. Reproductive individuals...

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...

Abstract The study deals with aspects of the population dynamics in thornback ray ( Raja clavata L., 1758), one most abundant cartilaginous fish caught North Aegean Sea. Females accounted for 73.08% and males 26.92% all individuals. Total length females ranged between 50.2 89.9 cm (disc width: 33.4–62.0 cm), 43.1 82.7 30.7–64.2 respectively. Relationships total (TL) weight (TW), disc width (DW)...