The effect of temperature on the development of yolk-sac larvae of European hake (Merluccius merluccius L.) under laboratory conditions

2016 ◽  
Vol 48 (4) ◽  
pp. 1392-1405 ◽  
Author(s):  
Carlos Guevara-Fletcher ◽  
Paula Alvarez ◽  
Javier Sanchez ◽  
José Iglesias
Keyword(s):  
Yolk Sac ◽  
Effect Of Temperature ◽  
Merluccius Merluccius ◽  
Laboratory Conditions ◽  
European Hake

scholarly journals First Record ofAnisakis simplexThird-Stage Larvae (Nematoda, Anisakidae) in European HakeMerluccius merluccius lessepsianusin Egyptian Water

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yasmin Abou-Rahma ◽  
Rewaida Abdel-Gaber ◽  
Amira Kamal Ahmed
Keyword(s):  
Red Sea ◽  
Positive Relationship ◽  
First Record ◽  
Type I ◽  
Merluccius Merluccius ◽  
Molecular Analyses ◽  
Fish Samples ◽  
Third Stage ◽  
European Hake ◽  
Anisakid Larvae

The prevalence of infection and the identification of anisakid larvae in European hakeMerluccius merluccius lessepsianusfrom Hurghada City, Red Sea Governorate, Egypt, were investigated. Fish samples were collected during the period of February and November 2014. Twenty-two (36.66%) out of sixty examined fish specimens were found to be naturally infected withAnisakistype I larvae mostly found as encapsulated larvae in visceral organs. There was a positive relationship between host length/weight and prevalence of infection. Based on morphological, morphometric, and molecular analyses, these nematodes were identified as third-stage larvae ofAnisakis simplex. The present study was considered as the first report of anisakid larvae from European hake in the Egyptian water.

European hake (Merluccius merluccius, Linnaeus 1758) spillover analysis using VMS and landings data in a no-take zone in the northern Catalan coast (NW Mediterranean)

2021 ◽  
Vol 237 ◽  
pp. 105870 ◽  
Author(s):  
Joan Sala-Coromina ◽  
Jose Antonio García ◽  
Paloma Martín ◽  
Ulla Fernandez-Arcaya ◽  
Laura Recasens
Keyword(s):  
Merluccius Merluccius ◽  
Catalan Coast ◽  
Nw Mediterranean ◽  
European Hake

scholarly journals Influence of environmental variables on the feeding and diet of European hake (Merluccius merluccius) on the Mediterranean Iberian coasts

2004 ◽  
Vol 84 (4) ◽  
pp. 831-835 ◽  
Author(s):  
J.E. Cartes ◽  
J. Rey ◽  
D. Lloris ◽  
L. Gil de Sola
Keyword(s):  
Prey Availability ◽  
Western Mediterranean ◽  
Delayed Response ◽  
Feeding Intensity ◽  
Merluccius Merluccius ◽  
Phytoplankton Pigment ◽  
Consumption Rates ◽  
Wet Weight ◽  
European Hake ◽  
Food Consumed

The feeding intensity and the diet of Merluccius merluccius were studied along a 1000 km latitudinal scale on the coasts of the Iberian Peninsula (western Mediterranean) in spring 2000. Merluccius merluccius was distributed along two bathymetric bands corresponding to the deep continental shelf (between 36 to 148 m), and the upper slope (between 215 to 310 m). At the shelf small crustaceans (mainly euphausiids and mysids) were dominant in the diet while fish (mainly Myctophidae) were the preferred prey on the slope. Feeding intensity of hake was significantly higher in areas with higher hake density suggesting feeding aggregations. Also, feeding intensity was significantly correlated with phytoplankton pigment concentrations (ppc), though only with ppc recorded one month before on the hake sampling stations. This delay between ppc and feeding intensity of hake may be a response to higher prey availability, because most hake prey were pelagic in origin (euphausiids, Clupeiformes) and they may reach high densities after exploiting local phytoplankton blooms. This delayed response seems to have more a local or spotted pattern. During three 8-h sampling cycles food consumed by hake ranged between 1·01 to 5·51% body wet weight (BWW), on average within the range of food consumption rates of other benthopelagic, active swimmer, fish.

scholarly journals Integrated response of antioxidant biomarkers in the liver and white muscle of European hake (Merluccius merluccius L.) females from the Adriatic sea with respect to environmental influences

2018 ◽  
Vol 70 (1) ◽  
pp. 205-214 ◽  
Author(s):  
Sladjan Pavlovic ◽  
Slavica Borkovic-Mitic ◽  
Tijana Radovanovic ◽  
Branka Gavrilovic ◽  
Svetlana Despotovic ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
White Muscle ◽  
Adriatic Sea ◽  
Principal Component ◽  
Seasonal Effects ◽  
Merluccius Merluccius ◽  
Biomarker Response ◽  
Antioxidant Defense Enzymes ◽  
Integrated Response ◽  
European Hake

We investigated the integrated response of antioxidant defense enzymes (total superoxide dismutase (TotSOD), manganese-containing superoxide dismutase (MnSOD), copper-zinc-containing superoxide dismutase (CuZnSOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR) and phase II biotransformation enzyme, glutathione- S-transferase (GST)) in the liver and white muscle of females of European hake (Merluccius merluccius L.) from the Adriatic Sea (Montenegro) in winter and spring. The activity of GSH-Px in the liver was significantly increased, while GST activity was decreased in spring compared to the winter. In white muscle, the activities of TotSOD and CuZnSOD were increased, while the activities of MnSOD, CAT, GSH-Px, GR and GST were decreased in spring when compared to the matching values in winter. The activities of TotSOD and CuZnSOD in winter were markedly lower in the muscle than in the liver, while the activity of MnSOD in the muscle was higher when compared to the liver. Principal component analysis (PCA) revealed clear separation of the investigated antioxidant biomarkers between tissues and seasons, while the integrated biomarker response (IBR) showed that the most intensive antioxidant biomarker response was in the liver in spring. Star plots of IBR showed a dominant contribution of glutathione-dependent biomarkers (GSH-Px, GR and GST) and CAT in both tissues and seasons with respect to SOD isoenzymes. All enzyme activities (except MnSOD) were greater in the liver in comparison to the white muscle. Our results show that the liver possesses a greater capacity to establish and maintain homeostasis under changing environmental conditions in winter and spring. At the same time, seasonal effects are more pronounced in muscle tissue.

scholarly journals Age estimation, growth and maturity of the European hake (Merluccius merluccius (Linnaeus, 1758)) from Iberian Atlantic waters

2003 ◽  
Vol 60 (5) ◽  
pp. 1086-1102 ◽  
Author(s):  
C Piñeiro ◽  
M Saínza
Keyword(s):  
Life History ◽  
Age Estimation ◽  
Growth Parameters ◽  
Grey Literature ◽  
Von Bertalanffy ◽  
Merluccius Merluccius ◽  
Consistent Manner ◽  
The Mean ◽  
First Maturity ◽  
European Hake

Abstract Difficulties in age estimation for hake (Merluccius merluccius) have hampered the assessment of stocks. Here, we describe new, agreed ageing criteria based on the interpretation of the pattern of otolith growth. Improved estimates of von Bertalanffy growth parameters, and new estimates of maturity ogive parameters and length–weight relationships for European hake from Iberian Atlantic waters are presented. The results came from a study carried out during 1996–1997 and provide the first published account of the main life history traits of Southern stock hake. von Bertalanffy growth parameters of males were L∞ = 70cm, K = 0.18 year−1, and t0=−0.97 year, and those of females were L∞ = 89cm, K = 0.13 year−1, and t0 = −1.15 year. Growth of sexes differed from age 3 onwards, with females being on average larger and heavier than males. The estimated total length (L, cm)–total weight (W, g) relationships were W=0.0132135L2.8134246 for males and W=0.0086471L2.942563 for females. Spawning took place from December to May with a peak in February. The mean length and age at first maturity were 32.8 cm at 2.5 years for males and 45 cm at 4.4 years for females. Application of new ageing criteria showed that otolith sections may be used to determine ages up to 5 years in a consistent manner. These results indicate that hake of the Southern stock grow at higher rates and mature earlier than previously considered. Summaries of hake's life history parameters from other marine regions are also presented in order to make information that belongs largely to the grey literature available.

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