scholarly journals Ontogenetic shifts in microhabitat preference of the temperate reef fish Forsterygion lapillum: implications for population limitation

2006 ◽  
Vol 320 ◽  
pp. 259-266 ◽  
Author(s):  
CJ McDermott ◽  
JS Shima
Keyword(s):  
Reef Fish ◽  
Population Limitation ◽  
Microhabitat Preference ◽  
Ontogenetic Shifts ◽  
Temperate Reef ◽  
Temperate Reef Fish

scholarly journals Ontogenetic shifts in microhabitat preference of the temperate reef fish Forsterygion lapillum: implication for population limitation

2020 ◽  
Author(s):  
C McDermott ◽  
Jeffrey Shima
Keyword(s):  
Choice Experiment ◽  
Habitat Associations ◽  
Microhabitat Use ◽  
Population Limitation ◽  
Ontogenetic Shifts ◽  
Temperate Reef ◽  
Random Assortment ◽  
Choice Chamber ◽  
Temperate Reef Fish ◽  
Local Recruitment

Quantitative surveys of habitat associations of New Zealand's common triplefin fish Forsterygion lapillum suggest that young settlers disproportionately occur within the fronds of the large brown algae Cystophora retroflexa and C. torulosa (hereafter collectively referred to as Cystophora). This apparent preference is specific to Cystophora (i.e. fish do not appear to respond to structurally similar macroalgal species) and is not exhibited by older juveniles or adults of the species, which suggests that age-specific microhabitat requirements may act as a bottleneck to recruitment. To determine whether the overuse of Cystophora by newly settled F. lapillum could be attributed to a behavioural preference for this specific habitat, we conducted a lab-based choice experiment. Using a purpose-built 'choice chamber' that facilitated assessments of behavioural responses of focal individuals provided with a choice of 4 common habitat types, we determined that newly settled F. lapillum selected chambers containing Cystophora more frequently than predicted by random assortment. To test the ecological consequences of this behavioural preference, we conducted a field experiment (replicated at 2 sites) that manipulated Cystophora cover and examined subsequent patterns of recruitment by F. lapillum. Experimental additions of Cystophora cover enhanced local recruitment of F. lapillum, and the effects of Cystophora additions were most pronounced at the site where Cystophora was naturally rare. Overall, these results suggest that age-specific behavioural preferences may mediate ontogenetic shifts in microhabitat use and limit recruitment in local populations. © Inter-Research 2006.

scholarly journals Ontogenetic shifts in social aggregation and habitat use in a temperate reef fish

Ecosphere ◽  
2020 ◽  
Vol 11 (12) ◽  
Author(s):  
Emily K. Fobert ◽  
Simon E. Reeves ◽  
Stephen E. Swearer
Keyword(s):  
Habitat Use ◽  
Reef Fish ◽  
Ontogenetic Shifts ◽  
Social Aggregation ◽  
Temperate Reef ◽  
Temperate Reef Fish

scholarly journals Ontogenetic shifts in microhabitat preference of the temperate reef fish Forsterygion lapillum: implication for population limitation

2020 ◽  
Author(s):  
C McDermott ◽  
Jeffrey Shima
Keyword(s):  
Choice Experiment ◽  
Habitat Associations ◽  
Microhabitat Use ◽  
Population Limitation ◽  
Ontogenetic Shifts ◽  
Temperate Reef ◽  
Random Assortment ◽  
Choice Chamber ◽  
Temperate Reef Fish ◽  
Local Recruitment

Quantitative surveys of habitat associations of New Zealand's common triplefin fish Forsterygion lapillum suggest that young settlers disproportionately occur within the fronds of the large brown algae Cystophora retroflexa and C. torulosa (hereafter collectively referred to as Cystophora). This apparent preference is specific to Cystophora (i.e. fish do not appear to respond to structurally similar macroalgal species) and is not exhibited by older juveniles or adults of the species, which suggests that age-specific microhabitat requirements may act as a bottleneck to recruitment. To determine whether the overuse of Cystophora by newly settled F. lapillum could be attributed to a behavioural preference for this specific habitat, we conducted a lab-based choice experiment. Using a purpose-built 'choice chamber' that facilitated assessments of behavioural responses of focal individuals provided with a choice of 4 common habitat types, we determined that newly settled F. lapillum selected chambers containing Cystophora more frequently than predicted by random assortment. To test the ecological consequences of this behavioural preference, we conducted a field experiment (replicated at 2 sites) that manipulated Cystophora cover and examined subsequent patterns of recruitment by F. lapillum. Experimental additions of Cystophora cover enhanced local recruitment of F. lapillum, and the effects of Cystophora additions were most pronounced at the site where Cystophora was naturally rare. Overall, these results suggest that age-specific behavioural preferences may mediate ontogenetic shifts in microhabitat use and limit recruitment in local populations. © Inter-Research 2006.

A comparison of temperate reef fish assemblages recorded by three underwater stereo-video techniques

2005 ◽  
Vol 148 (2) ◽  
pp. 415-425 ◽  
Author(s):  
Dianne L. Watson ◽  
Euan S. Harvey ◽  
Marti J. Anderson ◽  
Gary A. Kendrick
Keyword(s):  
Reef Fish ◽  
Fish Assemblages ◽  
Temperate Reef ◽  
Stereo Video ◽  
Temperate Reef Fish

Rapid changes in life-history characteristics of a long-lived temperate reef fish

2007 ◽  
Vol 58 (12) ◽  
pp. 1096 ◽  
Author(s):  
Philippe E. Ziegler ◽  
Jeremy M. Lyle ◽  
Malcolm Haddon ◽  
Graeme P. Ewing
Keyword(s):  
Life History ◽  
Reef Fish ◽  
Stock Assessment ◽  
Contributing Factors ◽  
Young Males ◽  
Temperate Reef ◽  
Life History Characteristics ◽  
Rapid Changes ◽  
Temperate Reef Fish ◽  
Underlying Mechanisms

Banded morwong, Cheilodactylus spectabilis, a long-lived sedentary temperate reef fish, has undergone rapid changes in its growth and maturity characteristics along the east coast of Tasmania, Australia. Over a period of 10 years, growth of young males and females has consistently accelerated, such that in 2005, 3-year-old fish were up to 40 mm or 13% longer compared with 1996, and age at 50% maturity for females had declined from 4 to 3 years. The magnitude and speed of the observed changes were unexpected given the species’ longevity (maximum age of over 95 years). The underlying mechanisms for the changes remain unclear but density-dependent responses to changes in population size and age composition, possibly mediated through reduced competition for shelter and intra-specific interactions, may have been contributing factors. Increasing sea surface temperatures over part of the period of change does not appear to have been a major driver and a genetic response to fishing seems unlikely. Notwithstanding any uncertainty, C. spectabilis populations have become more productive in recent years, challenging the general approach towards stock assessment where life-history characteristics are assumed to remain stable across contrasting levels of stock abundance and environmental conditions.

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