scholarly journals Somatic growth rates of hawksbill turtles Eretmochelys imbricata in a northern Great Barrier Reef foraging area

2012 ◽  
Vol 446 ◽  
pp. 275-283 ◽  
Author(s):  
I Bell ◽  
DA Pike
Keyword(s):  
Great Barrier Reef ◽  
Growth Rates ◽  
Somatic Growth ◽  
Barrier Reef ◽  
Eretmochelys Imbricata ◽  
Foraging Area ◽  
Hawksbill Turtles

The hawksbill turtle, Eretmochelys imbricata, in Queensland: population structure within a southern Great Barrier Reef feeding ground.

1992 ◽  
Vol 19 (4) ◽  
pp. 489 ◽  
Author(s):  
CJ Limpus
Keyword(s):  
Great Barrier Reef ◽  
Carapace Length ◽  
Regression Equations ◽  
Barrier Reef ◽  
Growth Data ◽  
Eretmochelys Imbricata ◽  
Nesting Beaches ◽  
Hawksbill Turtles ◽  
Feeding Grounds

Hawksbill turtles, Eretmochelys imbricata, live at low density on coral reefs in the southern Great Barrier Reef. The biomass of the species on Heron Reef was estimated at 0.82 kg ha-1. This is equivalent to 3.34 turtles km-1. The nesting beaches used by these E. imbricata are unknown. However, within the Great Barrier Reef and Coral Sea region, no regular nesting by the species occurs within 1200 km of these reefal feeding grounds. E. imbricata take up long-term residence in these feeding grounds at a minimum curved carapace length of 35.0cm. The E. imbricata feeding over these reefs ranged in size from these small immatures up to adults with curved carapace length of 87.5cm, but the maturity ratio was very strongly biased toward immatures (maturity ratio=0.01 adults). The sex ratio of all size classes was significantly skewed in favour of females (2.57 : 1 females : male overall) while 2% of the turtles were identified as intersex. Growth data from these turtles indicate that they will be decades old at first breeding. A key for sexing and assessing reproductive maturity of E. imbricata is provided. Regression equations for converting between curved carapace length and other standard measures including straight carapace measures, weight, head length and width and plastron length are described.

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

scholarly journals Coral growth, survivorship and return-on-effort within nurseries at high-value sites on the Great Barrier Reef

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0244961
Author(s):  
Lorna Howlett ◽  
Emma F. Camp ◽  
John Edmondson ◽  
Nicola Henderson ◽  
David J. Suggett
Keyword(s):  
Great Barrier Reef ◽  
Growth Rates ◽  
Water Channel ◽  
Warm Season ◽  
Tourism Industry ◽  
Barrier Reef ◽  
Management Tools ◽  
Trade Offs ◽  
Acropora Hyacinthus ◽  
Relative Return

Coral reefs are deteriorating worldwide prompting reef managers and stakeholders to increasingly explore new management tools. Following back-to-back bleaching in 2016/2017, multi-taxa coral nurseries were established in 2018 for the first time on the Great Barrier Reef (GBR) to aid reef maintenance and restoration at a “high-value” location–Opal Reef–frequented by the tourism industry. Various coral species (n = 11) were propagated within shallow water (ca. 4-7m) platforms installed across two sites characterised by differing environmental exposure–one adjacent to a deep-water channel (Blue Lagoon) and one that was relatively sheltered (RayBan). Growth rates of coral fragments placed onto nurseries were highly variable across taxa but generally higher at Blue Lagoon (2.1–10.8 cm2 month-1 over 12 months) compared to RayBan (0.6–6.6 cm2 month-1 over 9 months). Growth at Blue Lagoon was largely independent of season, except for Acropora tenuis and Acropora hyacinthus, where growth rates were 15–20% higher for December 2018-July 2019 (“warm season”) compared to August-December 2018 (“cool season”). Survivorship across all 2,536 nursery fragments was ca. 80–100%, with some species exhibiting higher survivorship at Blue Lagoon (Acropora loripes, Porites cylindrica) and others at RayBan (A. hyacinthus, Montipora hispida). Parallel measurements of growth and survivorship were used to determine relative return-on-effort (RRE) scores as an integrated metric of “success” accounting for life history trade-offs, complementing the mutually exclusive assessment of growth or survivorship. RRE scores within sites (across species) were largely driven by growth, whereas RRE scores between sites were largely driven by survivorship. The initial nursery phase of coral propagation therefore appears useful to supplement coral material naturally available for stewardship of frequently visited Great Barrier Reef tourism (high-value) sites, but further assessment is needed to evaluate how well the growth rates and survival for nursery grown corals translate once material is outplanted.

scholarly journals Variation in growth rates of branching corals along Australia’s Great Barrier Reef

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Kristen D. Anderson ◽  
Neal E. Cantin ◽  
Scott F. Heron ◽  
Chiara Pisapia ◽  
Morgan S. Pratchett
Keyword(s):  
Great Barrier Reef ◽  
Growth Rates ◽  
Barrier Reef

Age and growth rates of Hawaiian hawksbill turtles (Eretmochelys imbricata) using skeletochronology

2012 ◽  
Vol 160 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Melissa L. Snover ◽  
George H. Balazs ◽  
Shawn K. K. Murakawa ◽  
Stacy K. Hargrove ◽  
Marc R. Rice ◽  
...  
Keyword(s):  
Growth Rates ◽  
Age And Growth ◽  
Eretmochelys Imbricata ◽  
Hawksbill Turtles

scholarly journals Distribution and growth rates of immature hawksbill turtles Eretmochelys imbricata in Fernando de Noronha, Brazil

2019 ◽  
Vol 40 ◽  
pp. 41-52
Author(s):  
C Bellini ◽  
AJB Santos ◽  
AR Patrício ◽  
LFW Bortolon ◽  
BJ Godley ◽  
...  
Keyword(s):  
Growth Rates ◽  
Eretmochelys Imbricata ◽  
Fernando De Noronha ◽  
Hawksbill Turtles
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