scholarly journals Influence of sex and maturity state on trace elements content in liver and muscle of the SciaenidaeTotoaba macdonaldi

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11068
Author(s):  
Lia C. Méndez-Rodríguez ◽  
Berenice Hernández-Aguilar ◽  
Juan A. de Anda-Montañez ◽  
Eduardo F. Balart ◽  
Martha J. Román-Rodríguez ◽  
...  
Keyword(s):  
Trace Elements ◽  
Gulf Of California ◽  
Linear Models ◽  
Human Consumption ◽  
Fish Length ◽  
Maturity Stage ◽  
Dietary Reference Intake ◽  
Total Fish ◽  
Totoaba Macdonaldi ◽  
Migratory Movements

BackgroundThe fishTotoaba macdonaldiis endemic to the Upper Gulf of California. Its migratory movements involve sites with high levels of trace elements in the environment that can accumulate in tissues. In this study, lead (Pb), copper (Cu), cadmium (Cd), zinc (Zn) and iron (Fe) concentrations in male and female totoaba liver and muscle were quantified at various sexual maturity stages along the species’ geographic distribution.MethodsGeneralized linear models were used to explore associations between trace element concentrations and season of the year, sex/maturity stage, and total fish length.ResultsNo detectable Pb concentrations were recorded in liver or muscle; Cu, Cd, Zn and Fe contents in totoaba liver and muscle were typical of fish inhabiting areas with no contamination issues and are within international maximum permissible levels for human consumption. Variations in the content of Cd, Cu, Zn and Fe in liver of totoaba seem to be more related to the feeding and reproductive physiology of this species than as result of environmental exposure. Results suggest that consumption of totoaba muscle does not pose a public health risk. Furthermore, depending on the sex/maturity stage of totoaba, this fish’s muscle may provide approximately 70% Cu, 60% Zn and 100% Fe of the recommended dietary reference intake.

Temporal variation in oxidative stress indicators in liver of totoaba (Totoaba macdonaldi) Perciformes: Sciaenidae

2017 ◽  
Vol 98 (4) ◽  
pp. 833-844 ◽  
Author(s):  
Sandra Berenice Hernández-Aguilar ◽  
Tania Zenteno-Savin ◽  
Juan Antonio De-Anda-Montañez ◽  
Lia Celina Méndez-Rodríguez
Keyword(s):  
Oxidative Stress ◽  
Gulf Of California ◽  
Linear Models ◽  
Glutathione S Transferase ◽  
Stress Indicators ◽  
Sea Temperature ◽  
Predictive Variables ◽  
Totoaba Macdonaldi ◽  
Stress Oxidative ◽  
Oxidative Stress Indicators

Several characteristics of Totoaba macdonaldi Perciformes: Sciaenidae, including migratory movements along temperature gradients make it vulnerable to oxidative stress. Oxidative stress can also be associated with reproduction. The objectives of the present study were to examine oxidative stress indicators in liver of totoaba throughout the seasons (spring, autumn and winter), and the associated fluctuations in superficial sea temperature (SST, °C), as well as to evaluate possible variations between sexes and reproductive maturity stages. A total of 173 liver samples from totoaba captured in the Gulf of California, Mexico, were obtained from April 2010 to February 2013. Superoxide radical production (O2•−), lipid peroxidation (TBARS) levels, and activity of antioxidant enzymes; superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR) and glutathione S-transferase (GST) were quantified spectrophotometrically. Generalized linear models (GLM) were used to determine which factors contribute to explain O2•− production and TBARS levels. The significant predictive variables were the seasons, which were significant in all applied models, as well as SOD and CAT activities. In general, enzyme activity was higher in immature totoaba; this was not seasonally modified. Low temperatures in winter were associated with high O2•− production and TBARS levels, particularly in totoaba that are not yet reproductively mature. Seasonal changes in sea surface temperature did not affect the oxidative stress indicators in mature totoaba (both males and females); this suggests that mature totoaba are less sensitive to temperature changes from an oxidative stress perspective.

scholarly journals Vaquita: beleaguered porpoise of the Gulf of California, México

Therya ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 187-206
Author(s):  
Bernd Würsig ◽  
Thomas A. Jefferson ◽  
Gregory K. Silber ◽  
Randall S. Wells
Keyword(s):  
Gulf Of California ◽  
Line Transect ◽  
Human Consumption ◽  
External Appearance ◽  
Modern Times ◽  
Additional Information ◽  
Illegal Fishing ◽  
Acoustic Arrays ◽  
Totoaba Macdonaldi ◽  
Occurrence Patterns

The vaquita (Phocoena sinus), an endemic porpoise of the Gulf of California, México, was first described scientifically in 1958, from three skulls.  It is considered a sister taxon of an ancestor of the Southern Hemisphere Burmeister’s porpoise (P. spinipinnis) and spectacled porpoise (P. dioptrica), a case of antitropical distribution and speciation.  Vaquita in modern times seem to have existed largely in waters 10 to 30 m deep of the very northern Gulf of California, and may have already existed in relatively low numbers by the 1950s and 1960s.  The external appearance of the vaquita was not described until the late 1970s, and not until the 1980s and 1990s did additional information  about ecology and biology emerge.  Those studies and more recent shipboard and aerial visual line transect surveys, as well as stationary and boat-towed acoustic arrays, mapped occurrence patterns and approximate numbers in greater detail than before.  The first credible estimates of abundance appeared in the 1990s, with numbers in the mid-hundreds and declining.  While several reasons for the decline were originally postulated, mortality due to entanglement in nets has been established as the only known cause of decline, especially due to bycatch in large-mesh gillnets set for the endangered croaker fish totoaba (Totoaba macdonaldi).  This fish is prized in China for human consumption of its swim bladder, generally ground up for purported therapeutic purposes.  An extensive, lucrative fishery for totoaba, now illegal for many decades, has existed since at least the 1920s, and has recently increased.  Although there have been laudable attempts to stem or halt totoaba fishing, these have largely been unsuccessful, and as of this writing the vaquita is on the brink of extinction.  However, rapid concentrated action against illegal fishing with gillnets may yet save the species, and hope (with attendant action) must be kept alive.  This overview is followed by an appendix of a previously unpublished popular essay by K.S. Norris describing when, where, and how he first discovered the species, and subsequent early work relative to this newly-described porpoise.

scholarly journals Cadmium, Lead, Copper, Zinc, and Iron Concentration Patterns in Three Marine Fish Species from Two Different Mining Sites inside the Gulf of California, Mexico

2021 ◽  
Vol 18 (2) ◽  
pp. 844
Author(s):  
Elisa Serviere-Zaragoza ◽  
Salvador E. Lluch-Cota ◽  
Alejandra Mazariegos-Villarreal ◽  
Eduardo F. Balart ◽  
Hugo Valencia-Valdez ◽  
...  
Keyword(s):  
Fish Species ◽  
Gulf Of California ◽  
Anthropogenic Activities ◽  
Iron Concentration ◽  
Dry Weight ◽  
Human Consumption ◽  
Metal Concentrations ◽  
Mining Sites ◽  
Copper Zinc ◽  
Cadmium Lead

In the Gulf of California; mineral deposits have contributed to high metal contents in coastal environments. This study examined cadmium; lead; copper; zinc; and iron contents in three fish species; Kyphosus vaigiensis (herbivore), Stegastes rectifraenum (omnivore), and Balistes polylepis (carnivore) at two mining sites. Metal concentrations were analyzed by atomic absorption spectrophotometry and stable nitrogen and carbon isotopes were estimated using mass spectrophotometry. Also, we assessed the risk to human health from the consumption of these three species based on permissible limits; although only two of them (Kyphosus and Balistes) are consumed as food. Metal concentrations differed among fish species; except for iron. The highest concentrations of metals were not always recorded in the species at the highest trophic level; i.e., Balistes. The highest concentrations (dry weight) recorded were cadmium (0.21 ± 0.03 µg g−1) and lead (1.67 ± 0.26 µg g−1), in S. rectifraenum; copper (1.60 ± 0.49 µg g−1) and zinc (67.30 ± 8.79 µg g−1), in B. polylepis; and iron (27.06 ± 2.58 µg g−1), in K. vaigiensis. Our findings show that each element accumulates differently in particular marine organisms; depending on the physiology of the species and the biogeochemistry of its habitat; which in turn is affected by the anthropogenic activities in adjacent areas. No risk of heavy metals toxicity is expected from the human consumption of the species and sites studied

scholarly journals The Use of Intrinsic Markers for Studying the Migratory Movements of Bats

Animals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3477
Author(s):  
Caralie T. Brewer ◽  
William A. Rauch-Davis ◽  
Erin E. Fraser
Keyword(s):  
Trace Elements ◽  
Wind Energy ◽  
Tissue Samples ◽  
Analysis Techniques ◽  
Marker Analysis ◽  
Stable Hydrogen Isotope ◽  
Research Questions ◽  
Intrinsic Marker ◽  
Bat Migration ◽  
Migratory Movements

Mortality of migratory bat species at wind energy facilities is a well-documented phenomenon, and mitigation and management are partially constrained by the current limited knowledge of bat migratory movements. Analyses of biochemical signatures in bat tissues (“intrinsic markers”) can provide information about the migratory origins of individual bats. Many tissue samples for intrinsic marker analysis may be collected from living and dead bats, including carcasses collected at wind energy facilities. In this paper, we review the full suite of available intrinsic marker analysis techniques that may be used to study bat migration, with the goal of summarizing the current literature and highlighting knowledge gaps and opportunities. We discuss applications of the stable isotopes of hydrogen, oxygen, nitrogen, carbon, sulfur; radiogenic strontium isotopes; trace elements and contaminants; and the combination of these markers with each other and with other extrinsic markers. We further discuss the tissue types that may be analyzed for each and provide a synthesis of the generalized workflow required to link bats to origins using intrinsic markers. While stable hydrogen isotope techniques have clearly been the leading approach to infer migratory bat movement patterns across the landscape, here we emphasize a variety of lesser used intrinsic markers (i.e., strontium, trace elements, contaminants) that may address new study areas or answer novel research questions.

Effects of age, maturity stage, sex and seasonality on the feeding strategies of the diamond stingray (Hypanus dipterurus) in the southern Gulf of California

2020 ◽  
Author(s):  
Diana C. Restrepo-Gómez ◽  
Víctor H. Cruz-Escalona ◽  
Mark S. Peterson ◽  
Paola A. Mejía-Falla ◽  
Andrés F. Navia
Keyword(s):  
Gulf Of California ◽  
Feeding Strategies ◽  
Maturity Stage

scholarly journals Morphology and morphometric relationships for sagitta otoliths in Lutjanus argentiventris (Pisces: Lutjanidae) and Hyporthodus acanthistius (Pisces: Serranidae) from the Colombian Pacific Ocean

2019 ◽  
Vol 24 (2) ◽  
pp. 337-361 ◽  
Author(s):  
Vladimir Puentes-Granada ◽  
Paola Rojas ◽  
Giovanni Pavolini ◽  
Carlos Fernando Gutierrez ◽  
Angel Andres Villa
Keyword(s):  
Regression Models ◽  
Fish Length ◽  
Otolith Growth ◽  
Growth Rings ◽  
Fish Weight ◽  
Red Grouper ◽  
Distal Surface ◽  
Total Fish ◽  
Yellow Snapper ◽  
Colombian Pacific

Fish earstones, or otoliths, are  inner ear structures that can be studied to determine a fish’s age and are a source of taxonomically informative data. In the present work, sagitta otoliths of the Yellowtail snapper (Lutjanus argentiventris) and the Red grouper (Hyporthodus acanthistius) were collected in the Colombian Pacific, and their key morphological features were studied. Otoliths of the Yellow tail snapper were distinctly concave by their distal surface, revealing features shared with species of its genus (Lutjanus). Red grouper otoliths were elliptic and compressed laterally by their proximal surface, bearing similarities to those of other Serranid species. Morphometric relationships between otolith size weight and whole fish size and weight were also studied. In Red groupers significant statistical morphometric relationships between otolith and body features were found via power regression models; successfully relating otolith length with total fish length, otolith weight with total fish length, otolith length with total fish weight, and otolith weight with total fish weight. No significant morphometric relationships were found for the Yellow snapper data. In both fish species, otolith transversal sections proved best to identify its internal features and to distinguish otolith growth rings, as a method for determining the specimen’s age.

Total Reflection X-ray Spectrometry (TXRF) for Trace Elements Assessment in Edible Clams

2014 ◽  
Vol 68 (11) ◽  
pp. 1241-1246 ◽  
Author(s):  
Eva Marguí ◽  
Alexandra de Fátima Marques ◽  
Maria de Lurdes Prisal ◽  
Manuela Hidalgo ◽  
Ignasi Queralt ◽  
...  
Keyword(s):  
Trace Elements ◽  
Preliminary Investigation ◽  
Total Reflection ◽  
Mass Spectrometry Analysis ◽  
Human Consumption ◽  
Ultratrace Analysis ◽  
Present Contribution ◽  
Analytical Methodology ◽  
Element Determination ◽  
X Ray

The present contribution presents a preliminary investigation of the chemical composition with respect to major, minor, trace, and ultratrace elements in several clam species that are frequently used for human consumption in Portuguese markets and worldwide. In order to use a simple and rapid analytical methodology for clam analysis, energy dispersive X-ray fluorescence (EDXRF) spectrometry and total reflection X-ray fluorescence (TXRF) spectrometry were selected as analytical techniques. The analytical capabilities of TXRF spectrometry were evaluated for the determination of minor and trace elements in commercial edible clams. We compared the direct analysis of powdered suspensions (using different sample amounts and dispersant agents) with the analysis of the digested samples for trace element determination. Inductively coupled plasma mass spectrometry analysis of clam digests was also performed to evaluate the analytical possibilities of TXRF spectrometry for trace and ultratrace analysis.

Fish population size, and not density, as the determining factor of parasite infection: a case study

Parasitology ◽  
2004 ◽  
Vol 128 (3) ◽  
pp. 305-313 ◽  
Author(s):  
A. M. BAGGE ◽  
R. POULIN ◽  
E. T. VALTONEN
Keyword(s):  
Species Richness ◽  
Population Density ◽  
Population Size ◽  
Fish Population ◽  
Host Population ◽  
Fish Length ◽  
Total Fish ◽  
Infection Parameters ◽  
The Mean

The diversity and abundance of parasites vary widely among populations of the same host species. These infection parameters are, to some extent, determined by characteristics of the host population or of its habitat. Recent studies have supported predictions derived from epidemiological models regarding the influence of host population density: parasite abundance and parasite species richness are expected to increase with increasing host population density, at least for directly transmitted parasites. Here, we test this prediction using a natural system in which populations of the crucian carp, Carassius carassius (L.), occur alone, with no other fish species, in a series of 9 isolated ponds in Finland. The ectoparasite communities in these fish populations consist of only 4 species of monogeneans (Dactylogyrus formosus, D. wegeneri, D. intermedius and Gyrodactylus carassii); the total and relative abundance of these 4 species varies among ponds, with one or two of the species missing from certain ponds. Across ponds, only one factor, total fish population size, explained a significant portion of the variance in both the mean number of monogenean species per fish and the mean total abundance of monogenean individual per fish. In contrast, fish population density did not influence either monogenean abundance or species richness, and neither did any of the other variables investigated (mean fish length per pond, number of fish examined per pond, distance to the nearest lake, and several water quality measures). In our system, proximity among fish individuals (i.e. host population density) may not be relevant to the proliferation of monogeneans; instead, the overall availability of host individuals in the host population appeared to be the main constraint limiting parasite population growth.

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