Nonintrusive Video Technique for in Situ Sizing of Coral Reef Fishes

Copeia ◽  
1999 ◽  
Vol 1999 (3) ◽  
pp. 789 ◽  
Author(s):  
Ronald P. Pfister ◽  
Denis Goulet
Keyword(s):  
Coral Reef ◽  
Reef Fishes ◽  
Coral Reef Fishes

What the Pelagic Stages of Coral Reef Fishes Are Doing out in Blue Water: Daytime Field Observations of Larval Behavioural Capabilities

1996 ◽  
Vol 47 (2) ◽  
pp. 401 ◽  
Author(s):  
JM Leis ◽  
HPA Sweatman ◽  
SE Reader
Keyword(s):  
Coral Reef ◽  
Open Water ◽  
Reef Fishes ◽  
Vertical Movement ◽  
Coral Reef Fishes ◽  
Light Traps ◽  
Scuba Divers ◽  
Lizard Island ◽  
Wide Range

Late pelagic stages of coral reef fishes captured with light-traps were individually released during daylight by SCUBA divers in open water, 20-35 m deep, in the Great Barrier Reef Lagoon at three sites > 1 km from the reefs of Lizard Island. Observations in situ on 111 individuals of 11 families, but primarily Apogonidae, Chaetodontidae and Pomacentridae, constitute the first data of their kind. Most fish showed no overt reaction to the divers. Some individuals of some taxa of three families settled quickly to the bottom. Acceptable observations on swimming were made on 66 larvae. Individuals selected a wide range of depths, but when grouped by family, mean depths chosen by individuals were: apogonids, 6.5 (� 1.5, 95% CI) m; pomacentrids, 7.7 (� 1.5) m; and chaetodontids, 9.3 (� 1.3) m. Rough estimates of speed of up to 30 cm s-1 varied among taxa. Swimming directions of 59 of the 66 larvae were non-random. Mean directions differed among sites and were offshore at all of them. Most larvae swam offshore regardless of the side of the island where they were released. The late pelagic stages of coral reef fishes are strong swimmers capable of active horizontal and vertical movement. They swim directionally, can apparently detect reefs >1 km away, and orientate relative to those reefs. A taxonomic component is evident in many of these behaviours.

scholarly journals Komunitas ikan karang di Pantai Malalayang dan Pantai Meras Teluk Manado

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Sarah S. Sumual ◽  
Janny D. Kusen ◽  
Veibe Warouw ◽  
Carolus P. Paruntu ◽  
Kakaskasen A. Roeroe ◽  
...  
Keyword(s):  
Coral Reef ◽  
Similarity Index ◽  
Reef Fishes ◽  
Ecological Condition ◽  
Coral Reef Fishes ◽  
Community Diversity ◽  
Community Similarity ◽  
Online Identification ◽  
Study Sites

The study aimed to identify species of reef fishes, to obtain indexes of diversity  and dominance, eveness and to analyze the comparison of communities between the two study sites by Sorensen similarity index. Data was gathered in-situ with underwater recordings at a depth of 6 meters assisted by diving apparatus, and using fish visual census method. Subsequent data were identified using  fish identifikaction guide and WoRMS (Word Register of Marine Science) online identification applications. The number of species and specimens of reef fishes from each study site after bein identified were then analyzed  the diversity, dominance and similarity of the community between the two study sites. The coral reef fishes identification results that obtained from each study site  were:  20 families, 86 spesies and 362 specimen at  Malalayang beach, and 15 families, 55 spesies and 217 specimen at Meras beach. The value of the calculated index o community structure obtained by H’ 3.42 (Malalayang) and 2.91 (meras) has been shown the ecological condition of coral reef ecosystem which is still stable even though diversity is moderate, but inversely with low dominance value (D=0.08). The coral reef fishes in both study sites were very diverse and there was no dominant species. Eveness of community between two study sites high.The result of community similarity analysis using Sorensen Index was 49 % (<50 %) indicates that there was no community similarity of coral reef fishes between Malalayang Beach and Meras Beach which was allegedly caused by natural factors and or anthropogenic one in both research sites.Keywords : coral reef fishes community, diversity, dominance, community similarity

Grazing pressure of herbivorous coral reef fishes on low coral-cover reefs

Coral Reefs ◽  
2006 ◽  
Vol 25 (3) ◽  
pp. 461-472 ◽  
Author(s):  
Michelle J. Paddack ◽  
Robert K. Cowen ◽  
Su Sponaugle
Keyword(s):  
Coral Reef ◽  
Coral Cover ◽  
Reef Fishes ◽  
Grazing Pressure ◽  
Coral Reef Fishes
Sign in / Sign up

Export Citation Format

Share Document