scholarly journals Age and Growth of An Outbreaking Acanthaster cf. solaris Population within the Great Barrier Reef

Diversity ◽  
2017 ◽  
Vol 9 (1) ◽  
pp. 18 ◽  
Author(s):  
M. MacNeil ◽  
Karen Chong-Seng ◽  
Deborah Pratchett ◽  
Casssandra Thompson ◽  
Vanessa Messmer ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Age And Growth ◽  
Barrier Reef

scholarly journals Latitudinal and Cross-Shelf Patterns of Size, Age, Growth, and Mortality of a Tropical Damselfish Acanthochromis polyacanthus on the Great Barrier Reef

Diversity ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 67 ◽  
Author(s):  
Michael Kingsford ◽  
David Welch ◽  
Mark O’Callaghan
Keyword(s):  
Great Barrier Reef ◽  
Spatial Models ◽  
Outer Shelf ◽  
Age And Growth ◽  
Color Morph ◽  
Barrier Reef ◽  
Geographical Patterns ◽  
Continental Shelves ◽  
Demographic Patterns ◽  
Negative Linear Relationship

Patterns of age and growth of a sedentary damsel fish Acanthochromis polyacanthus were tested over a latitudinal range of approximately 10 degrees (1200 km) on the Great Barrier Reef (GBR), Australia. Within latitudes, these patterns were also compared on reefs in distance strata (inner, mid, and outer) across a continental shelf that ranged in width from 52 to 128 km. Although variation in length-max (SLMAX), growth, age-max (AMAX), and the von Bertalanffy metrics of Linf and K were found within and among latitudes, the greatest variation in some demographic characteristics was found among distance strata across the shelf regardless of latitude. Fish were always relatively smaller at inner shelf reefs and grew more slowly when compared to mid and outer shelf reefs; this was true regardless of the color morph of fish. The oldest fish collected was 11 years old, and there was no consistent variation in age-max among distances from shore. On outer reefs, there was a negative linear relationship with age-max and latitude. This “tropical gradient” of age only explained 34% of the variation; furthermore, this was not found when only the oldest group of fish was considered (top 10%). Fish only reached an age-max of six years on the southernmost reefs. There was a trend for a smaller Linf with latitude but it was not significant and Linf did not vary predictably with water temperature. The sampling of marine protected areas (MPAs) and fished zones did not confound the resultant patterns in that fish were not consistently larger or older in MPAs or fished zones. Instantaneous mortality rates were 0.245–0.685; they were highest at inner reefs and also showed no consistent MPA-related patterns. Our study suggested that the mid and outer shelf waters of the GBR appeared best suited for growth of A. polyacanthus. In conclusion, the position on continental shelves dominated other geographical patterns and needs to be considered in spatial models of growth. We suggest that local environmental conditions such as turbidity and the quality and quantity of plankton likely have a strong influence on distance across the shelf-based demographic patterns of planktivores.

Age validation, growth and mortality rates of the tropical snappers (Pisces: Lutjanidae) Lutjanus adetii (Castelnau, 1873) and L. quinquelineatus (Bloch, 1790) from the central Great Barrier Reef, Australia

1996 ◽  
Vol 47 (4) ◽  
pp. 575 ◽  
Author(s):  
SJ Newman ◽  
DM Williams ◽  
GR Russ
Keyword(s):  
Great Barrier Reef ◽  
Growth Curves ◽  
Mortality Rates ◽  
Age And Growth ◽  
Natural Mortality ◽  
Barrier Reef ◽  
Age Validation ◽  
Differential Growth ◽  
Instantaneous Rate ◽  
Annulus Formation

The age and growth of Lutjanus adetii and L. quinquelineatus from the central Great Barrier Reef were determined from studies of annuli in sectioned otoliths (sagittae). The period of annulus formation was validated by oxytetracycline labelling of externally tagged fishes. For L. adetii, validation was obtained from tagged fishes that were recaptured after a minimum of 12 months at liberty, the first time this has been achieved for a Lutjanus species. A single opaque and translucent zone was formed once a year, with the opaque band (annulus) being formed during the winter months. Otolith weight was strongly correlated with age for both species. There was significant differential growth between the sexes in length-at-age and weight-at-age for both species, with males growing larger than females. The oldest individuals found were a male L. adetii of 24 years of age and a female L. quinquelineatus of 31 years of age. The shape of the growth curves were steep for the first few years and then became asymptotic. The annual instantaneous rate of natural mortality (M) was 0.235 for L. adetii and 0.154 for L. quinquelineatus, representing an annual survivorship of 79% and 86%, respectively. The protracted longevity and low natural mortality rates imply that both L. adetii and L. quinquelineatus are vulnerable to overfishing despite their small size.

Age, growth and mortality of the Inshore Coarl Trout Plectropomus maculatus (Pisces: Serranidae) from the Central Great Barrier Reef, Australia

1992 ◽  
Vol 43 (5) ◽  
pp. 1301 ◽  
Author(s):  
BP Ferrira ◽  
GR Russ
Keyword(s):  
Great Barrier Reef ◽  
Growth Curve ◽  
Age And Growth ◽  
Late Winter ◽  
Von Bertalanffy ◽  
Barrier Reef ◽  
Total Rate ◽  
Coral Trout ◽  
In The Wild ◽  
Tetracycline Labelling

Age and growth of the inshore coral trout P. maculatus from the central Great Barrier Reef region was determined by studies of annuli in whole and sectioned sagittae. The periodicity of formation of the annulus was validated through tetracycline labelling of mark-recaptured fishes in the wild and of captive fishes in aquaria. Results obtained from three recaptured and five captive fishes showed that annuli are formed once a year during late winter and spring months. von Bertalanffy growth-curve parameters were L∞ = 60.00 cm SL, K= 0.206 and to = - 0.945 year. The oldest specimen examined was a 12-year-old male of 58 cm SL. The total rate of mortality (Z) was estimated to be 0.569.

scholarly journals Latitudinal and Cross-Shelf Patterns of Size, Growth and Mortality of a Tropical Damselfish Acanthochromis polyacanthus on the Great Barrier Reef

2018 ◽  
Author(s):  
Michael Kingsford ◽  
David Welch ◽  
Mark O'Callaghan
Keyword(s):  
Great Barrier Reef ◽  
Spatial Models ◽  
Mortality Rates ◽  
Outer Shelf ◽  
Age And Growth ◽  
Von Bertalanffy ◽  
Barrier Reef ◽  
Continental Shelves ◽  
Size Growth ◽  
Latitudinal Range

Patterns of age and growth of a sedentary damsel fish Acanthochromis polyacanthus were tested over a latitudinal range of approximately 10 degrees (1,200 km) on the Great Barrier Reef, Australia. Within latitudes these patterns were also compared on reefs across a continental shelf that ranged in width from 52 to 128 km. Although variation in length-max, growth, age-max and the von-Bertalanffy metrics of L, and K were found within and among latitudes, greatest variation in some demographic characteristics were found across the shelf regardless of latitude. Fish were always smaller at inner shelf reefs and grew more slowly when compared to mid and outer shelf reefs. The oldest fish collected was 11 years old and, there were no consistent variation in age-max among distances from shore. On outer reefs, there was a linear relationship with age-max and latitude. This ‘tropical gradient’ of age only explained 34% of the variation, further this was not found when the oldest 10% of fish were considered. Fish only reached an age-max of 6 years on the southern-most reefs. There was a trend for a smaller L with latitude but, it was not significant and L did not vary predictably with water temperature. The sampling of MPAs did not confound the resultant patterns. Instantaneous mortality rates were 0.245-0.685, highest at inner reefs and showed no consistent MPA-related patterns. Our study suggested that the mid and outer shelf waters of the GBR appeared best suited for growth of A. polyacanthus. In conclusion, position on continental shelves and related local environmental conditions needs to be considered in spatial models of growth.

Planktonic Larval Duration, age and growth of Ostorhinchus doederleini (Pisces: Apogonidae) on the southern Great Barrier Reef, Australia

2013 ◽  
Vol 161 (2) ◽  
pp. 245-259 ◽  
Author(s):  
M. J. Kingsford ◽  
M. D. Finn ◽  
M. D. O’Callaghan ◽  
J. Atema ◽  
G. Gerlach
Keyword(s):  
Great Barrier Reef ◽  
Age And Growth ◽  
Larval Duration ◽  
Barrier Reef ◽  
Planktonic Larval Duration

Management of Water Quality in the Great Barrier Reef Marine Park

1989 ◽  
Vol 21 (2) ◽  
pp. 31-38 ◽  
Author(s):  
Simon Woodley
Keyword(s):  
Water Quality ◽  
Coral Reef ◽  
Great Barrier Reef ◽  
Barrier Reef ◽  
Management Issue ◽  
Reef System ◽  
Marine Park ◽  
World Heritage List ◽  
The World ◽  
Coral Reef System

The Great Barrier Reef is the largest coral reef system in the world. It is recognised and appreciated worldwide as a unique environment and for this reason has been inscribed on the World Heritage List. The Reef is economically-important to Queensland and Australia, supporting substantial tourism and fishing industries. Management of the Great Barrier Reef to ensure conservation of its natural qualities in perpetuity is achieved through the establishment of the Great Barrier Reef Marine Park. The maintenance of water quality to protect the reef and the industries which depend on it is becoming an increasingly important management issue requiring better knowledge and possibly new standards of treatment and discharge.

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