The length-weight relationship, condition factor, and hepatosomatic index of three the most abundant commercially valuable croaker (Sciaenidae) species in coastal waters Nigeria were examined following mass fish kills. A total 489 individuals Pseudotolithus sampled, elongatus formed bulk catch, comprising 67.55% by numbers, followed P. typus senegalensis, which represented 23.15% 22.56%, respec...

Abstract Lumpfish is used to control sea lice in open net-pen farming of Atlantic salmon, but little known about their nutritional requirements. The aim this study was investigate the effects replacing marine oil (MO) with rapeseed (RO), diets incorporating 50 % plant protein concentrates, on growth, chemical and fatty acid (FA) composition juvenile lumpfish. Four extruded diets, nearly iso-lip...

Condition indices are key predictors of health and fitness in wild fish populations. Variation body condition, therefore, can be used to identify stressful conditions that may impact endangered species, such as California’s endemic Delta Smelt (Hypomesus transpacificus McAllister, 1963). Here, we examined spatiotemporal variation the condition > 1600 collected over nine years (2011–2019), a per...

In ecotoxicological testing, there are few studies that report on reproductive output (egg production) of marine or estuarine fish. Cunner (Tautogolabrus adspersus) were studied as a potential model species to evaluate the impact of pollutants with estrogenic activity on reproduction in estuarine fish populations. Cunner inhabit marine and estuarine areas where contaminant discharges are likely...

We collected adult cave swallows (Petrochelidon fulva) and cliff swallows (P. pyrrhonota) during the breeding seasons in 1999 and 2000 from eight locations along the Rio Grande from Brownsville to El Paso (unless otherwise specified, all locations are Texas, USA) and an out-of-basin reference location. Body mass, spleen mass, hepatosomatic index (HSI), gonadosomatic index (GSI), thyroxine (T4) ...

This study evaluated the status of well-being wild Nandus nandus in Kawadighi Haor through morphometric and gastrointestinal indices local people’s perceptions. Basic macroscopic morphology tract (GIT), viscera somatic index (VSI), hepatosomatic (HSI), condition factor (K), length–weight relationships, gut histology were analyzed from regular commercial catch. The GIT includes a tube-like esoph...

Two feeding trials were conducted to evaluate the influence of dietary curcumin level on fish meal replacement with poultry by-product (PBM) in a largemouth bass (Micropterus salmoides) diet. In trial I, reference diet (R) contained 400 g/kg meal, and PBM replaced 60 80% (P16 P8). II, containing 80 (P8) served as control (C), was added at 5000 10000 mg/kg (C5 C10), respectively. Replacement sig...

The effect of biofloc (BFT) and clear water (CW) at low (ls) high-water salinity (hs) in wild juveniles Penaeus setiferus were evaluated. Four treatments implemented: hsBFT, lsBFT, hsCW, lsCW. After 45 days, final weight (FW), gain (WG), hepatosomatic index (HSI), survival rate (SR) Antioxidant activity muscle hepatopancreas measured: superoxide dismutase (SOD), catalase (CAT), glutathione-S tr...