Ammonia excretion of octopus (Octopus vulgaris) in relation to body weight and protein intake

Garcı́a, Benjamı́n Garcı́a; Valverde, Jesús Cerezo; Gómez, Eva; Hernández, M.D. Jiménez; Aguado‐Giménez, Felipe

doi:10.1016/j.aquaculture.2011.06.017

Cited by 9 publications

(6 citation statements)

References 24 publications

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“…Multiple regression analysis (MRA) is a useful technique for developing predictive equations that estimate a dependent variable based on two or more independent variables. MRA, for instance, has been used in aquaculture to explain metabolic variables, such as oxygen consumption [16,17] or the production of ammonia [18]; crop factors, such as growth and feeding rates [19][20][21][22][23][24]; or loss of feed by mastication of seabream on fish farms [25]. MRA has also been very useful for the development of econometric equations in different aquaculture systems [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Garcı́a¹,

Jiménez

Aguado‐Giménez³

et al. 2019

Sustainability

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Equations were developed through multiple regression analysis (MRA) to explain the variability of potential environmental impacts (PEIs) estimated by life cycle assessment (LCA). The case studied refers to the production of seabass in basic offshore fish farms. Contribution analysis showed that the components of the system which most influence the potential environmental impacts are the feed (54% of the overall impact) and the fuel consumed by vessels operating in the farm (23%). Feed and fuel varied widely from one fish farm to another due to different factors, such as the efficiency of the feeding system used in each of them, or the distance from the harbor to the farm. Therefore, a number of scenarios (13) were simulated with different values of both factors and the results of the PEI were fitted by MRA to the model: PEI = a + b × Feed + c × Fuel. For all the PEIs, the regression coefficients were significant (p < 0.05) and R2 was 1. These equations allow us to estimate simply and quickly very different scenarios that reflect the reality of different farms at the present time, but also future scenarios based on the implementation of technologies that will decrease both feed and fuel consumption.

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Section: Introductionmentioning

confidence: 99%

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Garcı́a¹,

Jiménez

Aguado‐Giménez³

et al. 2019

Sustainability

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“…Intermittent feeding applies to conditions where a given amount of food is provided to the animal which it will consume in one “meal” and it is most commonly applied to providing food either daily (e.g., grass shrimp for Abdopus aculeatus , Alupay et al, 2014 ; pieces of fish for O. vulgaris , Matzner et al, 2000 ; García García et al, 2011 ), more frequently (e.g., frozen squid twice daily for O. vulgaris , Garcia-Garrido et al, 2010 ) or less frequently (e.g., a crab every second day in O. vulgaris , Boucher-Rodoni and Mangold, 1985 ; shore crab twice weekly in S. officinalis , Wearmouth et al, 2013 ). Food is not available at all times but obviously if the amount of food provided is greater than can be ingested in a single meal then in effect food is provided ad libitum .…”

Section: Feeding Cephalopods In Captivitymentioning

confidence: 99%

“…A further example of issues relating to the description of feeding regimes is provided by a study of O. vulgaris which comments, “octopuses were fed once per day to satiation with filet of frozen bogue ( Boops boops )” (García García et al, 2011 , p. 162). It is presumed that satiety was indicated by the refusal to take further food when offered but it would not necessarily be known if the animals would eat again if offered food prior to the next day.…”

Section: Feeding Cephalopods In Captivitymentioning

confidence: 99%

“…Accumulation of toxic ammonia from renal excretion arising primarily from protein metabolism (García García et al, 2011 ) and fecal contamination are a risk when transporting cephalopods in non-circulating sea water resulting in acidification. Depending upon the transport distance, species and size of the animal food deprivation should be considered and may be combined with transport in water at a temperature below ambient to reduce metabolic rate and carbon dioxide production (Fiorito et al, 2015 ).…”

Section: Food Deprivation As a Component Of Research Investigationsmentioning

confidence: 99%

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The Digestive Tract of Cephalopods: a Neglected Topic of Relevance to Animal Welfare in the Laboratory and Aquaculture

et al. 2017

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Maintenance of health and welfare of a cephalopod is essential whether it is in a research, aquaculture or public display. The inclusion of cephalopods in the European Union legislation (Directive 2010/63/EU) regulating the use of animals for scientific purposes has prompted detailed consideration and review of all aspects of the care and welfare of cephalopods in the laboratory but the information generated will be of utility in other settings. We overview a wide range of topics of relevance to cephalopod digestive tract physiology and their relationship to the health and welfare of these animals. Major topics reviewed include: (i) Feeding cephalopods in captivity which deals with live food and prepared diets, feeding frequency (ad libitum vs. intermittent) and the amount of food provided; (ii) The particular challenges in feeding hatchlings and paralarvae, as feeding and survival of paralarvae remain major bottlenecks for aquaculture e.g., Octopus vulgaris; (iii) Digestive tract parasites and ingested toxins are discussed not only from the perspective of the impact on digestive function and welfare but also as potential confounding factors in research studies; (iv) Food deprivation is sometimes necessary (e.g., prior to anesthesia and surgery, to investigate metabolic control) but what is the impact on a cephalopod, how can it be assessed and how does the duration relate to regulatory threshold and severity assessment? Reduced food intake is also reviewed in the context of setting humane end-points in experimental procedures; (v) A range of experimental procedures are reviewed for their potential impact on digestive tract function and welfare including anesthesia and surgery, pain and stress, drug administration and induced developmental abnormalities. The review concludes by making some specific recommendations regarding reporting of feeding data and identifies a number of areas for further investigation. The answer to many of the questions raised here will rely on studies of the physiology of the digestive tract.

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“…The TAN concentration and pH measurements were carried out by Orion® 4-Star Plus probe (ThermoScientific®, Waltham, Massachusetts, USA) together with ammonia and pH specific electrodes. Measurements of the TAN concentration were performed as described in García-García et al [33]. After the sample was taken, 100 µL of hydrochloric acid (J.T.Baker®, Avantor™, Central Valley, U.S.A.) were added and 1 mL of sodium hydroxide (Scharlau, Scharlab, Barcelona, España) was also added just before the ammonia ion selective electrode was used.…”

Section: Equipment and Chemical Productsmentioning

confidence: 99%

Influence of filter medium type, temperature and ammonia production on nitrifying trickling filters performance

Godoy-Olmos

Martínez‐Llorens

Tomás‐Vidal

et al. 2016

Journal of Environmental Chemical Engineering

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ElsevierGodoy-Olmos, S.; Martínez-Llorens, S.; Tomas-Vidal, A.; Jover Cerda, M. (2016). Influence of filter medium type, temperature and ammonia production on nitrifying trickling filters Notes: Full names separated by dashes indicate both surnames used in Spain. Initial letters stand for given names. ABSTRACTThis work focuses on the achieving of optimal design and modelling of nitrifying trickling filters for closed circuit aquaculture turbot (Psetta maxima) farms. Several process parameters influential in nitrifying filtration were established on experimental biofilters and their efficiency was tested, based on the removal of nitrogen contained in total ammonia nitrogen (N-TAN) in a fixed time (24 hours). Those process parameters were filter media types (Type A Biofill®, BactoBalls® and MECHpro® rings), temperatures (24.3ºC, 19.0ºC, 15.3ºC) and production of TAN (1.5, 3.0 and 4.5 g per day) while other process parameters values remained constant. TAN production was simulated with the addition of ammonium chloride (NH4Cl) in the recirculation system. Constant measuring of the total ammonia nitrogen concentration in the biofilter effluent was required to perform a model of N-TAN fluctuation based on a specific feeding regime and to ascertain performance differences between biofilters.At the end of the experiment, notable differences were observed in the ammonia removal rates depending on different process parameters. The BactoBalls® filter medium led to the highest mean N-TAN removal rates (0.24 g N-TAN removed m -2 day -1 ). The N-TAN removal rate generally increased with higher temperatures, the trials with the highest mean temperature (24.3ºC) led to the highest mean N-TAN removal rate (0.26 g N-TAN removed m -2 day -1 ). Similarly, the N-TAN removal rate increased with high TAN production. The trials in which production was 4.5 g per day showed the highest N-TAN mean removal rate (0.27 g N-TAN removed m -2 day -1 ).

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Ammonia excretion of octopus (Octopus vulgaris) in relation to body weight and protein intake

Cited by 9 publications

References 24 publications

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

Life Cycle Assessment of Seabass (Dicentrarchus labrax) Produced in Offshore Fish Farms: Variability and Multiple Regression Analysis

The Digestive Tract of Cephalopods: a Neglected Topic of Relevance to Animal Welfare in the Laboratory and Aquaculture

Influence of filter medium type, temperature and ammonia production on nitrifying trickling filters performance

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