Genyatremus luteus’ reproductive dynamics were investigated by examining the gonadal first maturation length (L50) and period (gonadosomatic index, GSI, relative condition factor, Kr) in relation to environmental factor rainfall. Sampling was conducted monthly from April 2016 2017, five areas (A1 A5) using gill nets fixed traps. The sex ratio distribution of 331 specimens captured (174 females,...

Specimens of Gangetic whiting, S. panijus, were collected from the Meghna estuary to estimate the fecundity and Gonadosomatic Index (GSI) during April-September, 2011. The morphometric and meristic features of the fish were measured. The co-efficient of correlations between total length and head length with other body measurements were significant (P<0.01). The logarithmic length-weight relatio...

The reproduction of the karamote prawn, Penaeus (Melicertus) kerathurus (Forskål 1775), was studied for the native population in Amvrakikos Gulf (Ionian Sea; western Greece). Sampling was carried out on a monthly basis between June 1999 and May 2001. The results showed that the shrimp Penaeus (Melicertus) kerathurus reproduction period spans between late April and late September. The size-at-ma...

Objective: The first aim of this study is to describe the length, weight, condition factor, and GSI Alburnus istanbulensis (Battalgil, 1941) in two different connected habitats (stream habitat reservoir lake) Karamenderes River, Çanakkale. second state growth type species sampled using length-weight relationship (LWR) model. Materials Methods: sampling areas are Bayramiç Reservoir tributaries o...

This study investigated the effect of different photoperiods (14L: 10D, 12L:12D and 10L:14D) on the gonadal development and GtH mRNA expression in the pituitary of damselfish. The results showed that gonadosomatic index (GSI) was significantly lower in shot photoperiod (10L:14D), in comparison with other photoperiodic group during the spawning season. After 60 days treatment, histological analy...

Rainbow trout were exposed to a secondary treated, thermomechanical/bleached kraft pulp and paper effluent in 12,000-L, flow-through exposure tanks at an environmental research facility located at a pulp and paper mill in Kawerau, New Zealand. Trout (age, 2+ years) were obtained from a local hatchery and exposed either to upstream river water or a nominal concentration of 12% (v/v) effluent dil...

Breeding performance of stunted rohu Labeo rohita (Hamilton, 1822) was compared with normally reared rohu. Randomly selected and normal fishes were tagged together in a single earthen pond for broodstock development. Both groups exhibited growth enhancement during the development period, though found larger size than fishes, after rearing period. Gonadosomatic Index (GSI) female indicated simil...

Aim: The present study was conducted to investigate the fishery, diet composition and reproductive aspects of obtuse barracuda landed in Karnataka, south-west coast India. Methodology: Feeding traits 1229 samples (638 males 591 females) S. obtusata studied for a period five years. index relative importance (IRI) determined each component stomach. Reproductive such as maturity stages, gonadosoma...

Reproductive fish behavior is affected by male-female interactions that stimulate physiological responses such as hormonal release and gonad development. During male-female interactions, visual and chemical communication can modulate fish reproduction. The aim of the present study was to test the effect of visual and chemical male-female interaction on the gonad development and reproductive beh...