scholarly journals Preliminary study on otolith chemistry and otolith morphology of two demersal fish species, European hake Merluccius merluccius (Linnaeus, 1758) and striped red mullet (Mullus surmuletus, Linnaeus, 1758) in the Sea of Marmara

2021 ◽  
Vol 38 (4) ◽  
pp. 515-521
Author(s):  
Habib Bal ◽  
Selim Esen
Keyword(s):  
Chemical Analysis ◽  
Fish Species ◽  
Demersal Fish ◽  
Migration Routes ◽  
Merluccius Merluccius ◽  
Tracking Stocks ◽  
Red Mullet ◽  
Mullus Surmuletus ◽  
The Difference ◽  
European Hake

Otoliths are calcium carbonate (CaCO3) accumulations. Under the influence of different ecosystems morphological and chemical composition change. In this study, economically important two demersal fish species; European hake Merluccius merluccius (Linnaeus, 1758) and Stripet red mullet (Mullus surmuletus Linnaeus, 1758) was examined. Otoliths (Sagitta) belonging to these two species have been studied both chemically and morphologicall. Morphometric measurements of otoliths (length, mm; width, mm; area, mm2; perimeter, mm) in the sagittal of each species was made by the Leica M125 tri-ocular microscope. In the chemical analysis of otoliths, strontium (Sr), magnesium (Mg) and calcium (Ca) trace element amounts, the ratios of Sr and Mg trace elements to Ca element (Sr/Ca and Mg/Ca) were determined. For the micro-chemical analysis of otoliths ICP-MS was used. The highest magnesium (24.92±9.57 mmol/mol) and strontium (26.17±1.81 mmol/mol) element values were found in the otolith of red mullet. The difference between strontium (Sr) and magnesium (Mg) amounts for two fish species was found to be significant (P<0.05). In addition to it was found that the difference between them in the amount of calcium is significant (P<0.001). The shape indexes of otoliths are significantly different between the two fish species. Especially in terms of roundness (RD) and aspect ratio (AR) (P<0.001). The results of this study provide information about the habitats of two economic importance demersal fish species. Since such studies can give information about the habitat areas of fish species, they are important for tracking stocks, migration routes and sustainable fisheries.

scholarly journals Investigation of aliphatic hydrocarbons in red mullet (Mullus barbatus) and European hake (Merluccius merluccius) fish caught from the Edremit Bay (Western Turkey)

2021 ◽  
Vol 38 (1) ◽  
pp. 1-10
Author(s):  
Enis Darılmaz
Keyword(s):  
Component Analysis ◽  
Primary Component ◽  
Aliphatic Hydrocarbon ◽  
Aliphatic Hydrocarbons ◽  
Merluccius Merluccius ◽  
Western Turkey ◽  
Red Mullet ◽  
Mullus Barbatus ◽  
European Hake

In this study, aliphatic hydrocarbon levels were investigated in red mullet and european hake fish caught by trawler from Edremit Bay (Western Aegean, Turkey) in spring and autumn 2015. For this purpose, trawling was carried out from 3 different regions of the Edremit Bay in both seasons. As a result of the analyzes, total aliphatic hydrocarbon (TAH) levels in red mullet were found to be higher than that of european hake. TAH concentrations found for red mullet were in the range of 456-2090 ng/g, while it was found in the range of 61-746 ng/g for european hake. In general, TAH concentrations in red mullet were higher than that of european hake for both seasons. In addition, EOM amounts were found higher in red mullet like TAH. According to correlation, cluster and primary component analysis results, it was observed that the compounds affecting TAH levels in red mullet are C11 and C12 aliphatic hydrocarbon compounds, while european hake have C15, C17 and Pristane compounds. These results indicate that the source of aliphatic hydrocarbons in Edremit Bay fish is biogenic in european hake samples, although not exact, it may be petrogenic in red mullet samples.

The fish populations of the Rockall Trough

1986 ◽  
Vol 88 ◽  
pp. 191-204 ◽  
Author(s):  
J. D. M. Gordon
Keyword(s):  
Fish Species ◽  
Demersal Fish ◽  
Fish Populations ◽  
Northeast Atlantic ◽  
Amount Of Information ◽  
Rockall Trough ◽  
The Difference ◽  
Agassiz Trawl ◽  
Seasonal Aspects

SynopsisThe fish populations of the Rockall Trough were poorly known until the early seventies, when there was an interest in the possible exploitation of the demersal fish of the upper slopes. These surveys were carried out by fisheries laboratories with commercial trawls fished on paired warps. At the same time the SMBA began an investigation into the seasonal aspects of the fish of the slopes, using paired warp and single warp otter trawls and an Agassiz trawl. These studies have resulted in a wealth of information on the fish collected by several towed gears and have enabled comparison to be made between different trawls. Of particular interest has been the difference in abundance and biomass estimates between paired and single warp trawls. The small amount of information on the biology of the fish species is briefly reviewed and the populations of the Rockall Trough are considered in the broader context of the northeast Atlantic.

scholarly journals Bioaccumulation of Metals/Metalloids and Histological and Immunohistochemical Changes in the Tissue of the European Hake, Merluccius merluccius (Linnaeus, 1758) (Pisces: Gadiformes: Merlucciidae), for Environmental Pollution Assessment

2020 ◽  
Vol 8 (9) ◽  
pp. 712
Author(s):  
Antonio Salvaggio ◽  
Roberta Pecoraro ◽  
Chiara Copat ◽  
Margherita Ferrante ◽  
Alfina Grasso ◽  
...  
Keyword(s):  
Fish Species ◽  
Inductively Coupled Plasma ◽  
Pollution Assessment ◽  
Hepatic Tissue ◽  
Trophic Chain ◽  
Merluccius Merluccius ◽  
Commercial Fish ◽  
Coastal Species ◽  
High Level ◽  
European Hake

Pollution and other types of environmental stress do not spare marine environments, especially those affected by high industrial pressure. Fish, especially coastal species, are used for monitoring the marine environment because they are particularly efficient as bioindicators thanks to their ability to bioaccumulate and biomagnify along the trophic chain. The aim of this research is to evaluate the bioaccumulation and the indirect bioindication ability of the European Hake, Merluccius merluccius (Linnaeus, 1758), one of the most important commercial fish species of the Mediterranean Sea. Morphological and histological alterations of the main target organs, such as liver and gills, have been investigated and the results showed a steatosis in the hepatic tissue. The accumulation of heavy metals has been analyzed by inductively coupled plasma mass spectrometry and for several metals it was showed a different concentration in the two sexes. Moreover, the expression of metallothioneins 1 and Heat Shock Protein 70 has been assessed by immunohistochemistry and did not show high level of expression. We underline the importance of contamination evaluation in commercial fish species and the utilization of the ichthyofauna as bioindicator of environmental quality.

scholarly journals Morphological characterization of Dujardinascaris spp. (Nematoda: Anisakidae) from the striped red mullet Mullus surmuletus in the Mediterranean Sea

2019 ◽  
Vol 56 (4) ◽  
pp. 338-346 ◽  
Author(s):  
R. Gamal Taha Hassan
Keyword(s):  
Mediterranean Sea ◽  
Dorsal Surface ◽  
Demersal Fish ◽  
The Body ◽  
Economic Losses ◽  
Helminth Parasites ◽  
New Host ◽  
Red Mullet ◽  
Mullus Surmuletus ◽  
The Mediterranean

SummaryThe striped red mullet Mullus surmuletus (Linnaeus, 1758) (Perciformis: Mullidae) has a high commercial value and therewithal is a common demersal fish of the Mediterranean Sea, therefore studying the helminth parasites of this fish is required. Anisakids nematodes are common parasites of animals including human causing economic losses and different parasitic diseases. During the present study, the nematode Dujardinascaris spp. (Anisakidae) was described from the body cavity and small intestine of Mullus surmuletus in the Alexandria, Mediterranean Sea, Egypt as new host and new geographical record. Forty-five (37.5%) fish out of (120) were found infected by the parasite. The morphological features of the collected nematode were investigated by both light and scanning electron microscopy. The study revealed that the specimens were characterized from other species of the genus by the presence of two large lateral pouches attached to each cephalic lip, the different large-sized papillae on the cephalic region and on the dorsal surface of the nematode cuticle.

scholarly journals CYP1A and metallothionein expression in the hepatopancreas of Merluccius merluccius and Mullus barbatus from the Adriatic sea

2010 ◽  
Vol 75 (8) ◽  
pp. 1149-1159 ◽  
Author(s):  
Mirjana Mihailovic ◽  
Miodrag Petrovic ◽  
Nevena Grdovic ◽  
Svetlana Dinic ◽  
Aleksandra Uskokovic ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Polychlorinated Biphenyls ◽  
Fish Species ◽  
Adriatic Sea ◽  
Relative Concentration ◽  
Biological Response ◽  
Merluccius Merluccius ◽  
Mullus Barbatus ◽  
Wide Range ◽  
Species Specific

The enzyme CYP1A is an established biomarker polychlorinated biphenyls of fish exposure to polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). The metallothioneins (MT), a family of Cys-rich proteins, bind a wide range of metals and participate in their metabolism. The aim of the study was to examine the correlation between CYP1A and MT expression in commercially important fish species Mullus barbatus and Merluccius merluccius and contaminants (PAHs, PCBs, toxic metals) in seawater and sediment from three localities with different level of contamination in the Adriatic Sea in winter, i.e., Platamuni, Valdanos and the port of Bar. The relative concentration of CYP1A was the highest in both fish species from Bar. Increased concentrations of PCBs in the seawater were observed only in Bar. A species-specific higher increase in the protein concentration of CYP1A was observed in Mullus barbatus compared to Merluccius merluccius. The levels of MT were the highest in Merluccius merluccius from Bar and in Mullus barbatus from Valdanos. The induction of MT correlated with the elevated concentrations of Cu and Pb determined by chemical analysis of the seawater from Bar and Valdanos, respectively. According to the chemical analysis of the seawater and the biological response of the fish, the Platamuni locality exhibited the lowest level of contamination.

scholarly journals Histological discrimination of fresh and frozen/thawed fish meat: European hake (Merluccius merluccius) as a possible model for white meat fish species

Food Control ◽  
2018 ◽  
Vol 92 ◽  
pp. 154-161 ◽  
Author(s):  
Lara Tinacci ◽  
Andrea Armani ◽  
Alessandra Guidi ◽  
Daniele Nucera ◽  
Deborah Shvartzman ◽  
...  
Keyword(s):  
Fish Species ◽  
White Meat ◽  
Merluccius Merluccius ◽  
Fish Meat ◽  
European Hake

Body shape and trawl cod end selectivity for nine commercial fish species

2003 ◽  
Vol 83 (6) ◽  
pp. 1309-1313 ◽  
Author(s):  
Zafer Tosunoğlu ◽  
Yeliz Doğanyilmaz Özbilgin ◽  
Hüseyin Özbilgin
Keyword(s):  
Fish Species ◽  
Body Shape ◽  
Morphological Characteristics ◽  
Mesh Size ◽  
Sea Bream ◽  
Merluccius Merluccius ◽  
Commercial Fish ◽  
Red Mullet ◽  
Common Pandora ◽  
Merlangius Merlangus

This study investigates the catch components of a commercially used demersal trawl cod end in Izmir Bay, and reveals some of the morphological characteristics of nine commercial fish species; red mullet (Mullus barbatus), hake (Merluccius merluccius), whiting (Merlangius merlangus euxinus), poor cod (Trisopterus minutus capelanus), tub gurnard (Trigla lucerna), common pandora (Pagellus erythrinus), axillary sea bream (Pagellus acarne), picarel (Spicara smaris) and annular sea bream (Diplodus annularis) in relation to mesh size and shapes. Furthermore selectivity of 40-mm polyethylene netting cod end for red mullet, hake, common pandora, axillary sea bream, picarel and annular sea bream is presented. The results are discussed in a way to understand the probable effects of fish body shape on mesh selectivity.

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