Comparison of techniques of back-calculation of growth and settlement marks from the otoliths of three species of Diplodus from the Mediterranean Sea

2000 ◽  
Vol 57 (6) ◽  
pp. 1291-1299 ◽  
Author(s):  
Laurent Vigliola ◽  
Mireille Harmelin-Vivien ◽  
Mark G Meekan
Keyword(s):  
Growth Rate ◽  
Mediterranean Sea ◽  
Marked Change ◽  
Somatic Growth ◽  
Growth Curves ◽  
Increment Width ◽  
Back Calculation ◽  
The Mediterranean ◽  
Size At Age ◽  
Settlement Mark

We developed a model of back-calculation of fish size from otoliths that could accommodate both changes in the relationship between otolith and somatic growth that occur through time and variation in growth rates among individuals. We used this model to back-calculate estimates of size and growth from otoliths of three species of Diplodus from the Mediterranean Sea. The outcomes of our model were compared with those of three other models and with growth curves estimated directly from populations of fish in the field. We found that our new model produced estimates of size-at-age that were closer to those observed in the field than the biological intercept, time-varying growth, and body proportional models. Comparison of profiles of increment width from otoliths of newly settled and juvenile Diplodus puntazzo and Diplodus vulgaris showed that these species formed a settlement mark, where increment width declined at settlement. In contrast, a settlement mark was not evident in the otoliths of Diplodus sargus. However, settlement of all species coincided with a sharp decline in somatic growth rate. Thus, growth rate may provide a means of estimating the timing of settlement in species that do not display a marked change in increment width.

Effects of temperature on growth rate and body size in the Mediterranean Sea anemone Actinia equina

2004 ◽  
Vol 313 (1) ◽  
pp. 63-73 ◽  
Author(s):  
O. Chomsky ◽  
Y. Kamenir ◽  
M. Hyams ◽  
Z. Dubinsky ◽  
N.E. Chadwick-Furman
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Mediterranean Sea ◽  
Sea Anemone ◽  
Effects Of Temperature ◽  
The Mediterranean

scholarly journals Decoupling of otolith and somatic growth during anadromous migration in a northern salmonid

2019 ◽  
Vol 76 (11) ◽  
pp. 1940-1953 ◽  
Author(s):  
Christie M. Morrison ◽  
Mélodie Kunegel-Lion ◽  
Colin P. Gallagher ◽  
Rick J. Wastle ◽  
Ellen V. Lea ◽  
...  
Keyword(s):  
Life History ◽  
Critical Time ◽  
Somatic Growth ◽  
Fish Growth ◽  
Calcium Deposition ◽  
Fish Length ◽  
Length Relationship ◽  
Anadromous Migration ◽  
Back Calculation ◽  
Size At Age

We assessed the fish length – otolith length relationship (FL–OL) in Dolly Varden (Salvelinus malma malma) to verify proportional growth. A decoupling was detected during first ocean migration where fish growth was occurring at a greater rate than otolith growth. Because of this decoupling, the application of traditional back-calculation models overestimated the size-at-age in premigratory char. We developed modified back-calculation equations from existing traditional models to account for this decoupling based on discontinuous piecewise regressions. The new biological intercept breakpoint method (BI–BP) provided the most accurate representation of fish size-at-age throughout all life history stages when compared with known size-at-capture values in fish. The decoupling indicates that factors other than somatic growth are important for otolith accretion. Physiological changes during smoltification likely alter calcium uptake and thereby affect calcium deposition rates on otoliths during this short but biologically critical time period of life history. It is probable that species exhibiting similar complex ontogenetic shifts in life history will likely exhibit decoupling to some extent in the FL–OL relationship.

scholarly journals Could the intertidal Ellisolandia elongata reef be affected by climate changes expected in the near future in the Mediterranean Sea?

2016 ◽  
Author(s):  
Matteo Nannini ◽  
Maurizio Florio ◽  
Maria Chiara Manauzzi ◽  
Agnese Marchini ◽  
Giancarlo Raiteri ◽  
...  
Keyword(s):  
Growth Rate ◽  
Mediterranean Sea ◽  
Climate Changes ◽  
Industrial Revolution ◽  
Effect Of Temperature ◽  
Ecological Niches ◽  
Associated Fauna ◽  
Experimental Conditions ◽  
The Mediterranean ◽  
Near Future

The concentration of Green House Gasses and specifically the concentration of CO2 in the atmosphere is continuously increasing since the industrial revolution and it is the most relevant anthropic cause driving climate changes. Two of the strongest symptoms of those changes are the Global Warming and the Ocean Acidification which are progressively altering marine ecosystems and the populations of living organisms they support. The Mediterranean Sea is widely considered a 'laboratory basin' by suffering dramatic changes in its oceanographic and biogeochemical conditions derived from natural and anthropogenic forces. Calcifying seaweeds are the most important 'bioconstructors', from mesolittoral to circalittoral fringe, providing habitats and ecological niches for other species (i.e. biodiversity promoters) but also are good 'recorders' of the environmental condition they experience (i.e. biondicators). In this study we focused on the reef-forming Ellisolandia elongata from the Gulf of La Spezia (N-W Mediterranean Sea) by comparing the physical properties, growth rate and abundance of associated fauna in natural and experimental conditions (temperature and pH expected for 2050-2100). Four sampling sites were chosen in the intertidal zone. Reef samples were bring in the laboratory and put in experimental conditions for a month. Four aquaria simulated the actual conditions of temperature and pH, other 4 aquaria simulated temperature (+3°C) and pH (7.7) expected for the year near future. E. elongata grown in the natural and experimental conditions withstand mechanical stress in slightly different ways. The study of the effect of temperature and pH variations on growth rate and associated fauna of E. elongata reef is still in progress.

scholarly journals Could the intertidal Ellisolandia elongata reef be affected by climate changes expected in the near future in the Mediterranean Sea?

2016 ◽  
Author(s):  
Matteo Nannini ◽  
Maurizio Florio ◽  
Maria Chiara Manauzzi ◽  
Agnese Marchini ◽  
Giancarlo Raiteri ◽  
...  
Keyword(s):  
Growth Rate ◽  
Mediterranean Sea ◽  
Climate Changes ◽  
Industrial Revolution ◽  
Effect Of Temperature ◽  
Ecological Niches ◽  
Associated Fauna ◽  
Experimental Conditions ◽  
The Mediterranean ◽  
Near Future

The concentration of Green House Gasses and specifically the concentration of CO2 in the atmosphere is continuously increasing since the industrial revolution and it is the most relevant anthropic cause driving climate changes. Two of the strongest symptoms of those changes are the Global Warming and the Ocean Acidification which are progressively altering marine ecosystems and the populations of living organisms they support. The Mediterranean Sea is widely considered a 'laboratory basin' by suffering dramatic changes in its oceanographic and biogeochemical conditions derived from natural and anthropogenic forces. Calcifying seaweeds are the most important 'bioconstructors', from mesolittoral to circalittoral fringe, providing habitats and ecological niches for other species (i.e. biodiversity promoters) but also are good 'recorders' of the environmental condition they experience (i.e. biondicators). In this study we focused on the reef-forming Ellisolandia elongata from the Gulf of La Spezia (N-W Mediterranean Sea) by comparing the physical properties, growth rate and abundance of associated fauna in natural and experimental conditions (temperature and pH expected for 2050-2100). Four sampling sites were chosen in the intertidal zone. Reef samples were bring in the laboratory and put in experimental conditions for a month. Four aquaria simulated the actual conditions of temperature and pH, other 4 aquaria simulated temperature (+3°C) and pH (7.7) expected for the year near future. E. elongata grown in the natural and experimental conditions withstand mechanical stress in slightly different ways. The study of the effect of temperature and pH variations on growth rate and associated fauna of E. elongata reef is still in progress.

scholarly journals Growth rate rather than temperature affects the B / Ca ratio in the calcareous red alga <i>Lithothamnion corallioides</i>

2021 ◽  
Author(s):  
Giulia Piazza ◽  
Valentina A. Bracchi ◽  
Antonio Langone ◽  
Agostino N. Meroni ◽  
Daniela Basso
Keyword(s):  
Growth Rate ◽  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Growth Rates ◽  
Atlantic Coast ◽  
Light Availability ◽  
Marine Species ◽  
Coralline Algae ◽  
Seasonal Temperature ◽  
The Mediterranean

Abstract. The B / Ca ratio in calcareous marine species is informative of past seawater CO32− concentrations, but scarce data exist on B / Ca in coralline algae (CA). Recent studies suggest influences of temperature and growth rates on B / Ca, the effect of which could be critical for the reconstructions of surface ocean pH and atmospheric pCO2. In this paper, we present the first LA-ICP-MS analyses of Mg, Sr, Li and B in the CA Lithothamnion corallioides collected from different geographic settings and depths across the Mediterranean Sea and in the Atlantic Ocean. We produced the first data on temperature proxies (Mg, Li and Sr / Ca) and B / Ca in a CA species grown in different Basins (the Mediterranean Sea and the Atlantic Ocean), from shallow to deep waters (12 m, 40 m, 45 m and 66 m depth). We tested the B / Ca correlation with temperature proxies and growth rates, in order to evaluate their possible effect on B incorporation. Our results showed a growth rate influence on B / Ca, especially in the deepest sample (Pontian Isl., Italy; 66 m) and in the shallowest sample (Morlaix, Atlantic coast of France; 12 m), where the growth rates were respectively 0.11 mm/yr and 0.13 mm/yr and the B / Ca was respectively 462.8 ± 49.2 μmol/mol and 726.9 ± 102.8 μmol/mol. A positive correlation between B / Ca and the temperature proxies was found only in Morlaix, where the seasonal temperature variation (ΔT) was the highest (8.90 °C). These pieces of evidence suggest that growth rates, triggered by the different ΔT and light availability across depth, affect the B incorporation in L. corallioides.

Feeding and growth of Atlantic cod (Gadus morhua L.) in the eastern Baltic Sea under environmental change

2019 ◽  
Vol 77 (2) ◽  
pp. 624-632 ◽  
Author(s):  
Stefan Neuenfeldt ◽  
Valerio Bartolino ◽  
Alessandro Orio ◽  
Ken H Andersen ◽  
Niels G Andersen ◽  
...  
Keyword(s):  
Growth Rate ◽  
Baltic Sea ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Somatic Growth ◽  
Environmental Forcing ◽  
Average Growth ◽  
Scarce Resources ◽  
Size At Age ◽  
Eastern Baltic

Abstract Five decades of stomach content data allowed insight into the development of consumption, diet composition, and resulting somatic growth of Gadus morhua (Atlantic cod) in the eastern Baltic Sea. We show a recent reversal in feeding level over body length. Present feeding levels of small cod indicate severe growth limitation and increased starvation-related mortality. For young cod, the low growth rate and the high mortality rate are manifested through a reduction in size-at-age. The low feeding levels are likely the result of a decrease in benthic prey abundance due to increased hypoxic areas, while decreasing abundances of pelagic species in the area of cod distribution have prevented a compensatory shift in diet. Our study emphasizes that environmental forcing and the decline in pelagic prey caused changes in consumption and growth rates of small cod. The food reduction is amplified by stunted growth leading to high densities of cod of smaller size competing for the scarce resources. The average growth rate is negative, and only individuals with feeding levels well above average will survive, though growing slowly. These results suggest that the relation between consumption rate, somatic growth and predatorprey population densities is strongly environmentally mediated.

Effects of feeding regime on growth rate in the Mediterranean Sea anemone Actinia equina (Linnaeus)

2004 ◽  
Vol 299 (2) ◽  
pp. 217-229 ◽  
Author(s):  
O. Chomsky ◽  
Y. Kamenir ◽  
M. Hyams ◽  
Z. Dubinsky ◽  
N.E. Chadwick-Furman
Keyword(s):  
Growth Rate ◽  
Mediterranean Sea ◽  
Sea Anemone ◽  
Feeding Regime ◽  
The Mediterranean

scholarly journals Devil in the details: growth, productivity, and extinction risk of a data-sparse devil ray

2016 ◽  
Author(s):  
Sebastián A. Pardo ◽  
Holly K. Kindsvater ◽  
Elizabeth Cuevas-Zimbrón ◽  
Oscar Sosa-Nishizaki ◽  
Juan Carlos Pérez-Jiménez ◽  
...  
Keyword(s):  
Growth Rate ◽  
Population Growth ◽  
Growth Rates ◽  
Population Growth Rate ◽  
Extinction Risk ◽  
Somatic Growth ◽  
Small Scale ◽  
Fishing Mortality ◽  
Population Growth Rates ◽  
Size At Age

Devil rays (Mobulaspp.) face rapidly intensifying fishing pressure to meet the ongoing international trade and demand for their gill plates. This has been exacerbated by trade regulation of manta ray gill plates following their 2014 CITES listing. Furthermore, the paucity of information on growth, mortality, and fishing effort for devil rays make quantifying population growth rates and extinction risk challenging. Here, we use a published size-at-age dataset for a large-bodied devil ray species, the Spinetail Devil Ray (Mobula japanica), to estimate somatic growth rates, age at maturity, maximum age and natural and fishing mortality. From these estimates, we go on to calculate a plausible distribution of the maximum intrinsic population growth rate (rmax) and place the productivity of this large devil ray in context by comparing it to 95 other chondrichthyan species. We find evidence that larger devil rays have low somatic growth rate, low annual reproductive output, and low maximum population growth rates, suggesting they have low productivity. Devil ray maximum intrinsic population growth ratermaxis very similar to that of manta rays, indicating devil rays can potentially be driven to local extinction at low levels of fishing mortality. We show that fishing rates of a small-scale artisanal Mexican fishery were up to three times greater than the natural mortality rate, and twice as high as our estimate ofrmax, and therefore unsustainable. Our approach can be applied to assess the limits of fishing and extinction risk of any species with indeterminate growth, even with sparse size-at-age data.

scholarly journals Historical analysis of somatic growth of Chilean hake (Merluccius gayi gayi) off central coast of Chile

2017 ◽  
Vol 41 (3) ◽  
pp. 558-569
Author(s):  
Francisco Cerna ◽  
Luis A. Cubillos ◽  
Guido Plaza
Keyword(s):  
Growth Rate ◽  
Growth Parameters ◽  
Historical Analysis ◽  
Somatic Growth ◽  
Growth Curves ◽  
Individual Growth ◽  
Linear Mixed Effect Model ◽  
Central Coast ◽  
Mixed Effect ◽  
Average Growth

Somatic growth was studied in the Chilean hake stock off central coast of Chile, through the application of Von Bertalanffy equation (vB) as a non-linear mixed effect model (NLME) on length-at-agedata derived from otolith readings made at Instituto de Fomento Pesquero since 1972. Average growth rates for each year from 1972 to 2009 were estimated. Growth parameters of vB curves were analyzed for three major periods regarding changes in stock biomass (1972-1990, 1991-2003 and 2004-2009). Results indicated that the average growth rate showed inter-annual variations that did not exceed ±15 cm of total length around the historical average of males and females, showing no persistent tendency towards sustained increase or decrease in somatic growth rate. Growth curves obtained with the vB parameters, estimated for the three periods, showed a similar trajectories until age 7 and 8 years, in both male and females. Changes after this age may be a result of a decrease of larger fish removed by the selective effect of fishing, which triggered variations in the fitted curves, but not necessarily changes in somatic growth of these ages in the population. The results demonstrated that the individual growth of hake has not changed significantly since 1972, without observing a density-dependent effect with decreasing abundance.

scholarly journals Effects of Different Salinities on Juvenile Growth ofGammarus aequicauda(Malacostraca: Amphipoda)

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Lídia Delgado ◽  
Guillermo Guerao ◽  
Carles Ribera
Keyword(s):  
Growth Rate ◽  
Population Density ◽  
Mediterranean Sea ◽  
Ebro Delta ◽  
Juvenile Growth ◽  
Lower Growth ◽  
Acclimation Period ◽  
Gammarus Aequicauda ◽  
Lower Growth Rate ◽  
The Mediterranean

Gammarus aequicaudais a euryhaline amphipod that is a common inhabitant of brackish environments of the Mediterranean Sea. In the Ebro delta, the population density ofG. aequicaudais highly variable throughout the year. The main objective of this study is to investigate the effect of salinity on the growth ofG. aequicaudajuveniles.G. aequicaudaembryos and juveniles can survive and grow in the laboratory between 2 psu and 40 psu salinity, depending on the previous acclimation period for the reproductive individuals. Adults acclimated at 34 psu produced embryos and juveniles that survived and developed at salinities between 9 psu and 40 psu; adults acclimated at 9 psu produced embryos and juveniles that could develop in oligohaline conditions. The lower growth rate values were 10.9 μm d−1and 13.5 μm d−1at 40 psu and 2 psu, respectively, with the higher values of 18.0 μm d−1and 18.5 μm d−1at 19 and 34 psu, respectively.

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