Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Feeding habits and food partitioning between three commercial fish associated with artificial reefs in a tropical coastal environment

Feeding habits and food partitioning between three commercial fish associated with artificial... At Réunion Island (south-western Indian Ocean), artificial reefs were submerged in 2003 in a bay and were soon colonised by fish, among which were the highly abundant commercial species Lutjanus kasmira, Priacanthus hamrur and Selar crumenophthalmus. The high concentration and diversity of fish around the artificial reefs is surprising, considering the low abundance of potential benthic prey. We investigated the diet and food partitioning between the aforementioned species using stomach content and stable isotope analyses (δ13C, δ15N). Priacanthus hamrur and S. crumenophthalmus fed on a larger prey diversity and showed significant overlap in their diets, with crustacean larvae the dominant prey. Fish larvae dominated L. kasmira's diet, and δ15N values confirmed the species’ higher trophic level. Differences in δ13C between P. hamrur and S. crumenophthalmus indicated niche segregation, probably as a way to reduce competition, with P. hamrur being characterised by a smaller δ13C range and exhibiting a smaller isotopic niche than S. crumenophthalmus. There was a significant correlation between δ15N and fish standard length for the three species, suggesting that ontogeny partially explained the niche breadth. There was also a significant correlation between δ13C and length for L. kasmira, whereas individual specialisation was prevalent in S. crumenophthalmus. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Marine Science Taylor & Francis

Feeding habits and food partitioning between three commercial fish associated with artificial reefs in a tropical coastal environment

Feeding habits and food partitioning between three commercial fish associated with artificial reefs in a tropical coastal environment

Abstract

At Réunion Island (south-western Indian Ocean), artificial reefs were submerged in 2003 in a bay and were soon colonised by fish, among which were the highly abundant commercial species Lutjanus kasmira, Priacanthus hamrur and Selar crumenophthalmus. The high concentration and diversity of fish around the artificial reefs is surprising, considering the low abundance of potential benthic prey. We investigated the diet and food partitioning between the aforementioned species using...
Loading next page...
 
/lp/taylor-francis/feeding-habits-and-food-partitioning-between-three-commercial-fish-zAqCHmLxCq
Publisher
Taylor & Francis
Copyright
Copyright © NISC (Pty) Ltd
ISSN
1814-2338
eISSN
1814-232X
DOI
10.2989/1814232X.2013.829790
Publisher site
See Article on Publisher Site

Abstract

At Réunion Island (south-western Indian Ocean), artificial reefs were submerged in 2003 in a bay and were soon colonised by fish, among which were the highly abundant commercial species Lutjanus kasmira, Priacanthus hamrur and Selar crumenophthalmus. The high concentration and diversity of fish around the artificial reefs is surprising, considering the low abundance of potential benthic prey. We investigated the diet and food partitioning between the aforementioned species using stomach content and stable isotope analyses (δ13C, δ15N). Priacanthus hamrur and S. crumenophthalmus fed on a larger prey diversity and showed significant overlap in their diets, with crustacean larvae the dominant prey. Fish larvae dominated L. kasmira's diet, and δ15N values confirmed the species’ higher trophic level. Differences in δ13C between P. hamrur and S. crumenophthalmus indicated niche segregation, probably as a way to reduce competition, with P. hamrur being characterised by a smaller δ13C range and exhibiting a smaller isotopic niche than S. crumenophthalmus. There was a significant correlation between δ15N and fish standard length for the three species, suggesting that ontogeny partially explained the niche breadth. There was also a significant correlation between δ13C and length for L. kasmira, whereas individual specialisation was prevalent in S. crumenophthalmus.

Journal

African Journal of Marine ScienceTaylor & Francis

Published: Sep 1, 2013

Keywords: Lutjanus kasmira; Priacanthus hamrur; Réunion Island; Selar crumenophthalmus; stable isotopes; stomach contents; trophic niche width

References