Geographic influences on and the accuracy and precision of age estimates for the red bass, Lutjanus bohar (Forsskal 1775): A large tropical reef fish

2006 ◽  
Vol 80 (2-3) ◽  
pp. 322-328 ◽  
Author(s):  
Ross J. Marriott ◽  
Bruce D. Mapstone
Keyword(s):  
Reef Fish ◽  
Accuracy And Precision ◽  
Tropical Reef ◽  
Lutjanus Bohar ◽  
Age Estimates

Consequences of inappropriate criteria for accepting age estimates from otoliths, with a case study for a long-lived tropical reef fish

2006 ◽  
Vol 63 (10) ◽  
pp. 2259-2274 ◽  
Author(s):  
Ross J Marriott ◽  
Bruce D Mapstone
Keyword(s):  
Growth Parameters ◽  
Formal Analysis ◽  
Von Bertalanffy ◽  
Acceptance Criteria ◽  
Acceptance Criterion ◽  
Error Accumulation ◽  
Tropical Reef ◽  
Lutjanus Bohar ◽  
Age Estimates

Fish ages estimated from increments in otoliths are uncertain because of various sources of error, including increment interpretation. Interpretation error is often addressed by reading each otolith multiple times and accepting age estimates only if readings satisfy certain consistency criteria. Choice of an inappropriate acceptance criterion may significantly bias the accepted age estimates and derived parameters such as mortality. The frequencies and magnitudes of discrepancies from replicate readings of otoliths increased with age for the red bass, Lutjanus bohar. The trend was best described by a constant probability of misinterpreting each increment, indicating an age acceptance criterion that allowed for increasing discrepancy between readings with age. Simulations of three error processes in reading otoliths, two processes of error accumulation within readings, and six acceptance criteria illustrated the biases in age-based metrics that arise from choosing inappropriate acceptance criteria. Biases were largest for static constant, rather than proportional, acceptance criteria, leading to elevated exclusion of older otoliths, overestimation of mortality, and underestimation of mean age. von Bertalanffy growth parameters were generally estimated with little bias. We recommend formal analysis of alternative models of ageing error to choose appropriate acceptance criteria and minimise biases in age-based demographic metrics.

scholarly journals Temporal dynamics, residency and site fidelity of spawning aggregations of a herbivorous tropical reef fish Siganus sutor

2013 ◽  
Vol 475 ◽  
pp. 233-247 ◽  
Author(s):  
JP Bijoux ◽  
L Dagorn ◽  
G Berke ◽  
PD Cowley ◽  
M Soria ◽  
...  
Keyword(s):  
Reef Fish ◽  
Site Fidelity ◽  
Temporal Dynamics ◽  
Spawning Aggregations ◽  
Tropical Reef

scholarly journals Coral degradation and the structure of tropical reef fish communities

2007 ◽  
Vol 333 ◽  
pp. 243-248 ◽  
Author(s):  
DA Feary ◽  
GR Almany ◽  
GP Jones ◽  
MI McCormick
Keyword(s):  
Reef Fish ◽  
Fish Communities ◽  
Tropical Reef

scholarly journals Thermal sensitivity does not determine acclimation capacity for a tropical reef fish

2012 ◽  
Vol 81 (5) ◽  
pp. 1126-1131 ◽  
Author(s):  
Jennifer M. Donelson ◽  
Philip L. Munday
Keyword(s):  
Reef Fish ◽  
Thermal Sensitivity ◽  
Tropical Reef

Coral reef fish association with macroalgal beds on a tropical reef system in North-eastern Brazil

2013 ◽  
Vol 64 (12) ◽  
pp. 1101 ◽  
Author(s):  
L. T. C. Chaves ◽  
P. H. C. Pereira ◽  
J. L. L. Feitosa
Keyword(s):  
Reef Fish ◽  
Marine Protected Area ◽  
Marine Species ◽  
Abundant Species ◽  
Eastern Brazil ◽  
North Eastern ◽  
Tropical Reef ◽  
Tourism Activity ◽  
Canistrocarpus Cervicornis ◽  
Feeding Grounds

Macroalgal beds are recognised for their role as nursery and feeding grounds for several marine species. This study was conducted in the Tamandaré reef complex within the limits of the Costa dos Corais Marine Protected Area (MPA), North-eastern Brazil. The macroalgal bed studied is subjected to several disturbances, especially from tourism. The reef fish were assessed with free dives during the day and night using visual censuses within transects (20 × 2 m) and random swims. The percentage algal cover was estimated using quadrats (40 cm2). The behavioural traits of the fish also provided an understanding of their habitat use. In total, 68 fish species were recorded. The most abundant species were representatives of the families Labridae, Pomacentridae, Acanthuridae and Haemulidae. Sargassum polyceratium, Dictyopteris delicatula and Canistrocarpus cervicornis were the most abundant macroalgae. Because the most abundant fish trophic guild included primarily mobile invertebrate feeders (41.8%) and carnivores (28.4%), it is suggested that the high-canopy macroalgae harbour epiphytic invertebrates, which these fish use for food. Thereby, the study area would act as important nursery and feeding grounds. Tourism activity (e.g. laying chairs, trampling and anchoring) may disrupt fish behaviour and life- history traits and result in damage that would require mitigation through environmental awareness and law enforcement in the most affected areas.

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