scholarly journals Green turtle somatic growth dynamics: distributional regression reveals effects of differential emigration

2019 ◽  
Vol 616 ◽  
pp. 185-195 ◽  
Author(s):  
KA Bjorndal ◽  
AB Bolten ◽  
M Chaloupka
Keyword(s):  
Green Turtle ◽  
Somatic Growth ◽  
Growth Dynamics ◽  
Distributional Regression

Green turtle somatic growth dynamics in a spatially disjunct Great Barrier Reef metapopulation

Coral Reefs ◽  
2004 ◽  
Vol 23 (3) ◽  
pp. 325-335 ◽  
Author(s):  
Milani Chaloupka ◽  
Colin Limpus ◽  
Jeffrey Miller
Keyword(s):  
Great Barrier Reef ◽  
Green Turtle ◽  
Somatic Growth ◽  
Growth Dynamics ◽  
Barrier Reef

Demography and foraging ecology of Chelonia mydas on tropical shallow reefs in Bahia, Brazil

2015 ◽  
Vol 96 (6) ◽  
pp. 1295-1304 ◽  
Author(s):  
Adriana Jardim ◽  
Milagros López-Mendilaharsu ◽  
Francisco Barros
Keyword(s):  
Red Algae ◽  
Foraging Ecology ◽  
Activity Patterns ◽  
Somatic Growth ◽  
Growth Dynamics ◽  
Chelonia Mydas ◽  
Annual Growth Rate ◽  
Life Stages ◽  
Green Turtles ◽  
Spatial Use

Long-term tagging studies, particularly those that target life stages away from nesting beaches can provide important insights in key life history traits, which are essential for the effective management of endangered species. The coast of Bahia hosts important green turtle foraging areas, but information on demography, spatial use and foraging ecology in this region is lacking. Here, we (1) examined the size-class structure of green turtles in Bahia, (2) compared the size distribution from Bahia to other foraging aggregations in Brazil, and (3) studied the somatic growth dynamics. Additionally, we investigated the (4) diet, (5) habitat use and (6) activity patterns of green turtles along shallow reefs in Bahia. From 2009 to 2013, 322 green turtles were captured and 44 were recaptured between 7 and 1218 days after initial tagging. Curved carapace length varied from 32.9 to 122.5 cm. Mean annual growth rate was 3.03 ± 1.18 cm year−1. The diet of the turtles was mainly composed of red algae of the family Gelidiaceae, Gelidiellaceae and Cystocloniaceae. There was a positive relationship between the abundance of red algae and the number of turtle sightings, with a significant increase in foraging activity during late afternoon. This study highlights the importance of this area as a mixed foraging aggregation of juvenile and adult green turtles, and reveals that foraging grounds for this species in Brazil exhibit southern immature-dominated assemblages and northern mixed aggregations. Areas with high aggregation of green turtles comprising individuals from different life stages must be targeted for conservation management.

scholarly journals Somatic growth dynamics of West Atlantic hawksbill sea turtles: a spatio‐temporal perspective

Ecosphere ◽  
2016 ◽  
Vol 7 (5) ◽  
Author(s):  
Karen A. Bjorndal ◽  
Milani Chaloupka ◽  
Vincent S. Saba ◽  
Carlos E. Diez ◽  
Robert P. van Dam ◽  
...  
Keyword(s):  
Sea Turtles ◽  
Somatic Growth ◽  
Growth Dynamics ◽  
Temporal Perspective ◽  
Spatio Temporal

A state-space approach for detecting growth variation and application to North Pacific groundfish

2015 ◽  
Vol 72 (9) ◽  
pp. 1316-1328 ◽  
Author(s):  
Christine C. Stawitz ◽  
Timothy E. Essington ◽  
Trevor A. Branch ◽  
Melissa A. Haltuch ◽  
Anne B. Hollowed ◽  
...  
Keyword(s):  
State Space ◽  
Somatic Growth ◽  
Growth Dynamics ◽  
Gulf Of Alaska ◽  
First Year ◽  
State Space Approach ◽  
Growth Variation ◽  
Annual Cohort ◽  
Size At Age ◽  
Space Approach

Understanding demographic variation in recruitment and somatic growth is key to improving our understanding of population dynamics and forecasting ability. Although recruitment variability has been extensively studied, somatic growth variation has received less attention, in part because of difficulties in modeling growth from individual size-at-age estimates. Here we develop a Bayesian state-space approach to test for the prevalence of alternative forms of growth rate variability (e.g., annual, cohort-level, or in the first year recruited to the fishery) in size-at-age data. We apply this technique to 29 Pacific groundfish species across the California Current, Gulf of Alaska, and Bering Sea – Aleutian Islands marine ecosystems. About 40% of modeled stocks were estimated to exhibit temporal growth variation. In the majority of stocks, growth trends fluctuated annually across ages in a single year, suggesting that either there are shared environmental features that dictate growth across multiple ages or the presence of some systematic (within-year) observation errors. This method represents a novel way to use size-at-age data from fishery or other sources to test hypotheses about growth dynamics variability.

scholarly journals Life-History and Spatial Determinants of Somatic Growth Dynamics in Komodo Dragon Populations

PLoS ONE ◽  
2012 ◽  
Vol 7 (9) ◽  
pp. e45398 ◽  
Author(s):  
Rebecca J. Laver ◽  
Deni Purwandana ◽  
Achmad Ariefiandy ◽  
Jeri Imansyah ◽  
David Forsyth ◽  
...  
Keyword(s):  
Life History ◽  
Somatic Growth ◽  
Growth Dynamics

Growth Dynamics of White Muscle Fibres in Relation to Somatic Growth of Larvae of European Sea Bass (Dicentrarchus labrax, L.)

2006 ◽  
Vol 30 (5) ◽  
pp. 523-529 ◽  
Author(s):  
S Nejedli ◽  
Z. Kozariá ◽  
V. G. Kantura ◽  
Z. Petrinec ◽  
M. Zobundžija1 ◽  
...  
Keyword(s):  
White Muscle ◽  
Dicentrarchus Labrax ◽  
Somatic Growth ◽  
Growth Dynamics ◽  
Sea Bass ◽  
Muscle Fibres ◽  
European Sea Bass

GREEN TURTLE SOMATIC GROWTH MODEL: EVIDENCE FOR DENSITY DEPENDENCE

2000 ◽  
Vol 10 (1) ◽  
pp. 269-282 ◽  
Author(s):  
Karen A. Bjorndal ◽  
Alan B. Bolten ◽  
Milani Y. Chaloupka
Keyword(s):  
Density Dependence ◽  
Growth Model ◽  
Green Turtle ◽  
Somatic Growth ◽  
Model Evidence
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