Otolith increment width responses of juvenile Australian smeltRetropinna semonito sudden changes in food levels: the importance of feeding history

2008 ◽  
Vol 73 (4) ◽  
pp. 853-860 ◽  
Author(s):  
Z. Tonkin ◽  
A. J. King ◽  
D. S. L. Ramsey
Keyword(s):  
Increment Width ◽  
Otolith Increment

Otoliths of Chinook Salmon (Oncorhynchus tshawytscha): Daily Growth Increments and Factors Influencing Their Production

1982 ◽  
Vol 39 (10) ◽  
pp. 1340-1347 ◽  
Author(s):  
John D. Neilson ◽  
Glen H. Geen
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Fish Length ◽  
Feeding Frequency ◽  
Otolith Growth ◽  
Increment Width ◽  
Daily Growth ◽  
Factors Affecting ◽  
Growth Increments ◽  
Otolith Increment

The effects of photoperiod, feeding frequency, and water temperature on formation of otolith daily growth increments in juvenile chinook salmon (Oncorhynchus tshawytscha) were examined. Feeding frequency influenced both increment number and width, whereas photoperiod and temperature affected only increment width. Fish fed once/24 h produced one increment every 24 h on average, while fish fed 4 times/24 h produced more than one increment every 24 h. Wider increments were produced in fish exposed to warmer water (11 °C) or 24 h of darkness. The ratio of otolith size to fish size remained constant throughout and between the photoperiod, temperature, and feeding frequency experiments, regardless of the number or width of increments produced. Although otolith growth is isometric with respect to increase in fish length under these experimental regimes, otolith microstructure will differ in fish of the same size reared under different environmental conditions. An understanding of factors affecting otolith increment production is required before increment number and width can be used to assess growth rates.Key words: otolith, daily, growth increments, chinook salmon

Relationship between Otolith Microstructure and the Growth of Juvenile Chum Salmon (Oncorhynchus keta) under Different Prey Rations

1984 ◽  
Vol 41 (1) ◽  
pp. 126-133 ◽  
Author(s):  
Eric C. Volk ◽  
Robert C. Wissmar ◽  
Charles A. Simenstad ◽  
Douglas M. Eggers
Keyword(s):  
Growth Rate ◽  
Chum Salmon ◽  
Harpacticoid Copepod ◽  
Fish Growth ◽  
Oncorhynchus Keta ◽  
Otolith Microstructure ◽  
Increment Width ◽  
Chum Salmon Oncorhynchus Keta ◽  
Otolith Increment ◽  
Juvenile Chum Salmon

Effects of different prey taxa and daily ration levels on fish growth and the relationship between fish growth rate and mean otolith increment width were investigated for juvenile chum salmon (Oncorhynchus keta) in saltwater aquaria. Growth was positively correlated with ration, and food conversion efficiency was much higher for fish fed the harpacticoid copepod, Tigriopus californicus, than either the calanoid copepod, Pseudocalanus minutas, or the gammarid amphipod, Paramoera mohri. Otolith increments were produced daily for at least the first 160 d after hatching and there was a direct relationship between mean daily otolith increment width and fish growth rate. These results illustrate the possibility that otolith microstructure recapitulates juvenile chum growth histories during estuarine residence.

The role of measurement error on the interpretation of otolith increment width in the study of growth in larval fish

2001 ◽  
Vol 58 (11) ◽  
pp. 2204-2212 ◽  
Author(s):  
P Pepin ◽  
J F Dower ◽  
H P Benoît
Keyword(s):  
Measurement Error ◽  
Growth Rates ◽  
Environmental Conditions ◽  
Serial Correlation ◽  
Larval Fish ◽  
Increment Width ◽  
Growth Increments ◽  
Otolith Increment ◽  
Clear Increase

Patterns in increment widths and the associated measurement error were studied in the otoliths of radiated shanny (Ulvaria subbifurcata) larvae sampled from the field. Mean increment widths increased with larval age, whereas the relative measurement error decreased. Furthermore, the level of serial correlation in increment widths showed a clear increase with age. When measurement error was taken into consideration, the pattern of serial correlation indicates that an individual's growth increments did not show the effect of changes in local environmental conditions for at least 3 days, independent of age. Only after that period can we hope to detect the effect of environmental influences on increment widths (and by inference growth rates). The patterns of measurement error and serial correlation will have direct impacts on our ability to find the influence of environmental conditions on growth rates of individual larvae and determine patterns of selective loss in a population of larval fish.

scholarly journals Otolith increment width-based chronologies disclose temperature and density-dependent effects on demersal fish growth

2019 ◽  
Vol 77 (2) ◽  
pp. 633-644 ◽  
Author(s):  
Ana Rita Vieira ◽  
Sandra Dores ◽  
Manuela Azevedo ◽  
Susanne E Tanner
Keyword(s):  
Climate Change ◽  
Species Abundance ◽  
Demersal Fish ◽  
Fish Growth ◽  
Ocean Temperature ◽  
Increment Width ◽  
Growth Variation ◽  
Otolith Increment ◽  
Complex Linear ◽  
European Hake

Abstract Climate change and fishing are drastically impacting marine ecosystems. Comprehending the biological consequences of these effects on commercially exploited fish is especially challenging. Here, we developed a 43-year otolith increment width-based growth chronology for one of the most important commercially exploited fish species in the Northeast Atlantic (European hake, Merluccius merluccius). Increasingly complex linear mixed-effects models were used to partition growth variation into intrinsic (age, sex, and age-at-capture) and extrinsic (environmental and biotic variables) factors, allowing age interaction with extrinsic variables to assess age-dependent responses in growth. Our results provided strong evidence that European hake growth is impacted by ocean temperature, namely sea surface temperature and temperature at depth, and species abundance (recruitment), with different responses depending on fish age. We found evidence that increasing ocean temperature could be highly detrimental for species growth especially during the first years of life. We provided insights into the effects of environmental and biotic factors on species growth variation. Such information is key to recognize the sensitivity of European hake growth to climate change, which may contribute to sustainable management policies for this valuable resource.

Seasonal changes in otolith increment width trajectories and the effect of temperature on the daily growth rate of young sardines

2016 ◽  
Vol 25 (4) ◽  
pp. 362-372 ◽  
Author(s):  
Eudoxia Schismenou ◽  
Miquel Palmer ◽  
Marianna Giannoulaki ◽  
Itziar Alvarez ◽  
Kostas Tsiaras ◽  
...  
Keyword(s):  
Growth Rate ◽  
Seasonal Changes ◽  
Effect Of Temperature ◽  
Increment Width ◽  
Daily Growth Rate ◽  
Daily Growth ◽  
Otolith Increment
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