Partial replacement of fishmeal by a protein‐rich product from methanotrophic bacteria in juvenile red sea bream ( Pagrus major )

Using dietary additives to improve palatability of diets containing single‐cell protein from methanotrophic bacteria in yellowtail kingfish ( Seriola lalandi ) diets

“…Poor palatability of SCP has also been reported for other fish species including Atlantic halibut, red sea bream and rainbow trout (Aas et al, 2007; Biswas et al, 2021; Zamani et al, 2020). In Atlantic halibut, feed intake was reduced at an SCP inclusion of 18%, however, not at 9% (Aas et al, 2007).…”

“…In Atlantic halibut, feed intake was reduced at an SCP inclusion of 18%, however, not at 9% (Aas et al, 2007). Red sea bream performed poorly on diets containing >18% SCP due to reduced feed intake; however, no reduction in intake was observed at 12% inclusion levels (Biswas et al, 2021). Zamani et al (2020) described palatability concerns in rainbow trout fry when fed SCP at >25% inclusion, whilst inclusions of 12.5% and 25% performed better than the control in daily feed intake.…”

“…Single‐cell protein derived from methanotrophs has been demonstrated as an effective alternative to fishmeal in livestock animals including chickens (Hellwing, Tauson, & Skrede, 2007; Øverland et al, 2011) and pigs (Hellwing, Tauson, Kjos, & Skrede, 2007) as well as in several aquaculture species including Pacific white shrimp ( Litopenaeus vannamei ) (Chen et al, 2021, 2022), Atlantic halibut ( Hippoglossus hippoglossus ) (Aas et al, 2007; Øverland et al, 2010), Atlantic salmon ( Salmo salar ) (Aas et al, 2006; Berge et al, 2005; Storebakken et al, 2004), red sea bream ( Pagrus major ) (Biswas et al, 2021), rainbow trout ( Oncorhynchus mykiss ) (Hardy et al, 2018; Margareth Øverland et al, 2007; Zamani et al, 2020) and Japanese yellowtail ( Seriola quinqueradiata ) (Biswas et al, 2020). In the study by Biswas et al (2020) on Japanese yellowtail, the authors found methanotrophic derived SCP could replace 30% of a high fishmeal 680 g/kg diet.…”

Fishmeal, plant protein, and fish oil substitution with single-cell ingredients in organic feeds for European sea bass (Dicentrarchus labrax)

“…Additionally, several studies have evaluated the inclusion of bacterial protein in species with high dietary protein requirements like rainbow trout ( Oncorhynchus mykiss ), Japanese yellowtail ( Seriola quinqueradiata ), turbot ( Scophthalmus maximus L.), and red sea bream ( Pagrus major ) ( Biswas et al, 2020 ; Biswas et al, 2021 ; Rajesh et al, 2022 ; Zheng et al, 2023 ). A study conducted by Rajesh et al (2022) for rainbow trout, concluded that the bacterial protein can be included safely at 12.5% when fishmeal inclusion is 37%.…”

“…Since then, several bacteria strains were used for the production of microbial proteins with an emphasis on methanotrophic bacteria which have the potential to convert 70%–90% of the methane (otherwise released in the atmosphere) to over 60 million tonnes of protein ( Kalyuzhnaya et al, 2013 ). The use of microbial protein, in recent studies, showed high growth rates and digestibility in several other species ( Biswas et al, 2020 ; Zamani et al, 2020 ; Biswas et al, 2021 ; Pilmer et al, 2022 ).…”