Changes of proximate composition, energy storage and condition of European hake (Merluccius merluccius, L. 1758) through the spawning season

Domínguez-Petit, Rosario; Saborido-Rey, Fran; Medina, Isabel

doi:10.1016/j.fishres.2009.05.016

Cited by 57 publications

(40 citation statements)

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“…These data suggest that lipids from liver and muscle could be transferred to oocytes, but due to the constant feeding, the content of this energetic substrate is rapidly recovered as described in compensatory growth (Ali et al, 2003). Conversely, in Diplodus sargus (Pérez et al, 2007) and Merluccius merluccius (Domínguez-Petit et al, 2010) lipids increased in liver and muscle during the reproductive period, which was not characterized by reduced or interrupted feeding. So, in stable environments, dietary intake can be directly responsible for lipid accumulation in ovaries (Pérez et al, 2007).…”

Section: Discussionmentioning

confidence: 75%

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

et al. 2018

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This study aimed at analyzing the energetic substrate (ES) in the main storage tissues of Steindachneridion parahybae, throughout the reproductive cycle in captivity. Differently from wild, in captivity, feeding is not interrupted during the reproductive period, the females do not spawn spontaneously, and they are sedentary. Adult females were sampled monthly and based on their histology and gonadosomatic index (GSI), ovaries were classified into: previtellogenic (PRV), vitellogenic (VTG), and regression (REG) stages. Ovaries at the VTG stage showed higher protein and lipids levels than at the PRV stage with a positive correlation between these substrates and the GSI. Muscle was the main source of proteins transferred to the ovaries, according to the negative correlation between these organs. Lipids remained unchanged in the liver, which is an important supplier in vitellogenesis, a pattern that probably occurs due to the continuous feeding. Muscular glycogen levels were higher at the VTG and REG than at the PRV stages. Plasma triglycerides were also higher during REG, while glucose levels were more elevated during the VTG stage. These results suggest that with constant food supply, the pattern of deposition of ES in S. parahybae is different from that described for other wild potamodromous species.Keywords: Glycogen, Lipids, Metabolic substrate, Protein, Reproductive cycle.O objetivo deste estudo foi analisar a composição do substrato energético (SE) nos principais tecidos de armazenamento de Steindachneridion parahybae, durante todo o ciclo reprodutivo em cativeiro. Diferentemente do ambiente natural, em cativeiro, a alimentação desses animais não é interrompida durante o período reprodutivo, as fêmeas não desovam espontaneamente, e são sedentárias. Fêmeas adultas foram amostradas mensalmente e baseada na histologia e no índice gonadossomático (IGS), os ovários foram classificados: estádios pré-vitelogênico (PRV), vitelogênico (VTG) e regressão (REG). Os ovários no estádio VTG apresentaram uma maior concentração de lipídeos e proteínas em relação ao estágio PRV. Esses substratos correlacionaram-se positivamente com o IGS. O músculo foi a principal fonte de proteína transferida aos ovários, como foi confirmado pela análise de correlação negativa entre esses órgãos. Os lipídeos mantiveram-se inalterados no fígado, considerado um importante órgão fornecedor de lipídeos para a vitelogênese, padrão que possivelmente ocorreu devido à contínua alimentação. A concentração do glicogênio muscular foi mais elevada durante os estágios VTG e REG em relação ao PRV. A concentração de triglicerídeos plasmática apresentou maiores valores no estádio REG enquanto a concentração de glicose no plasma foi maior durante os estádios VTG. Esses resultados sugerem que com alimentação constante, as fêmeas de S. parahybae apresentam um distinto padrão de mobilização dos substratos energéticos em relação ao que já foi descrito para outras espécies potamódromas de ambiente natural. Palavras-chaves:Ciclo reprodutivo, Glicogênio, Lipídeos, P...

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Section: Discussionmentioning

confidence: 75%

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

et al. 2018

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“…This HSI pattern is evidence of the importance of the liver in the energy accumulation and synthesis of those energetic compounds (e.g., lipids and vitellogenin) essential for ovarian development . The decrease of K during the vitellogenic process and the low values of K at the GVM and hydration stages could indicate the role of the muscle in the mobilization of energy to the gonad or liver to fulfi ll the energetic requirements of maturation, principally during vitellogenesis (Zaboukas et al, 2006;Domínguez-Petit et al, 2010). …”

Section: Condition Indices Related To Reproductionmentioning

confidence: 99%

Reproductive potential of Yellowfin Tuna (Thunnus albacares) in the western Indian Ocean

Zudaire¹,

Murua²,

Grande³

et al. 2013

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Abstract-The reproductive biology of Yellowfin Tuna (Thunnus albacares) in the western Indian Ocean was investigated from samples collected in 2009 and 2010. In our study, 1012 female Yellowfin Tuna were sampled: 320 fish on board a purse seiner and 692 fish at a Seychelles cannery. We assessed the main biological parameters that describe reproductive potential: maturity, spawning seasonality, fish condition, and fecundity. The length at which 50% of the female Yellowfin Tuna population matures (L 50 ) was estimated at 75 cm in fork length (FL) when the maturity threshold was established at the cortical alveolar stage of oocyte development. To enable comparison with previous studies, L 50 also was estimated with maturity set at the vitellogenic stage of oocyte development; this assessment resulted in a higher value of L 50 at 102 cm FL. The main spawning season, during which asynchrony in reproductive timing among sizes was observed, was November-February and a second peak occurred in June. Smaller females (<100 cm FL) had shorter spawning periods (December to February) than those (November to February and June) of large individuals, and signs of skipspawning periods were observed among small females. The Yellowfin Tuna followed a "capital-income" breeder strategy during ovarian development, by mobilizing accumulated energy while using incoming energy from feeding. The mean batch fecundity for females 79-147 cm FL was estimated at 3.1 million oocytes, and the mean relative batch fecundity was 74.4 oocytes per gram of gonad-free weight. Our results, obtained with techniques defined more precisely than techniques used in previous studies in this region, provide an improved understanding of the reproductive cycle of Yellowfin Tuna in the western Indian Ocean.Knowledge of reproductive traits is important for understanding population dynamics, including a population's resilience to fi shing (Schaefer, 2001;Murua and Motos, 2006;Morgan et al., 2009). As alternatives to the traditional spawning stock biomass (SSB), reproductive potential indices have been proposed in which basic reproductive parameters are included as important factors that affect population productivity (Trippel, 1999;Morgan et al., 2009). These parameters include sex-ratio, the age and size of females, maturation ogive, fecundity, fi sh condition, and reproductive history. Inclusion of these biological parameters allows integration of fl uctuations in a population's reproductive success into the assessment and management processes, in addition to estimation of spawning stock biomass (SSB) Murua et al., 2010). Hence, to improve the assessment and management of stocks, it is necessary to increase the quality and quantity of the basic reproductive data used to estimate these reproductive parameters .Yellowfin Tuna (Thunnus albacares) is one of the major target species of the tuna fi shery in the Indian Ocean. Total annual catch of Yellowfi n Tuna in the Indian Ocean has increased signifi cantly, since the early 1980s, with the advent of the purseseine...

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“…The M . merluccius population in the study area has a protracted spawning season with peaks from January to March (Dominguez‐Petit et al ., ). Egg production appears to be more influenced by environmental conditions and food availability than by energy body reserves, and it appears that reproduction in M .…”

Section: Introductionmentioning

confidence: 98%

Spatio‐temporal variability in the cannibalistic behaviour of European hake Merluccius merluccius: the influence of recruit abundance and prey availability

Preciado

Punzón

Velasco

2015

Journal of Fish Biology

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Cannibalistic behaviour of European hake Merluccius merluccius was studied through the analysis of 49 836 gut contents belonging to individuals from 6 to 82 cm in total length (L(T)). Samples were collected every autumn between 1993 and 2009. The results showed that the consumption of conspecific individuals was consistent over space and time. The abundance, spatial distribution patterns and L(T) structure of M. merluccius recruits were the main variables involved in M. merluccius cannibalism. A geographical pattern was found since increasing cannibalism was observed in areas of recruit aggregations. The L(T) spectrum of recruits in autumn was also a key factor and dependent on the spawning period. When adults spawned from late spring to summer, an increasing cannibalism trend was found in autumn, due to the ideal size structure of the prey (M. merluccius recruits) for predators. Depth was also a significant variable, and a cannibal peak was detected at depths ranging between 50 and 200 m, coinciding with a spatial overlap of predator (pre-adults) and prey (recruits). The cannibalistic behaviour of M. merluccius began at c. 12 cm, although 75% were mid-sized individuals between 16 and 30 cm. Additionally, 90% of prey-hake were recruits <18·5 cm. Some biological and ecological aspects such as growth rate, spawning period, predation and competition interactions and the effect of some oceanographic events on M. merluccius cannibalism are also discussed.

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Changes of proximate composition, energy storage and condition of European hake (Merluccius merluccius, L. 1758) through the spawning season

Cited by 57 publications

References 56 publications

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

Reproductive potential of Yellowfin Tuna (Thunnus albacares) in the western Indian Ocean

Spatio‐temporal variability in the cannibalistic behaviour of European hake Merluccius merluccius: the influence of recruit abundance and prey availability

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