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- W2083136306 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 444:195-206 (2012) - DOI: https://doi.org/10.3354/meps09471 Extreme habitat specialisation and population structure of two gorgonian-associated pygmy seahorses R. E. Smith*, A. S. Grutter, I. R. Tibbetts School of Biological Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia *Email: richard.smith@uqconnect.edu.au ABSTRACT: Pygmy seahorses are a group of little-known miniature hippocampid fish that differ considerably in biology and ecology from their larger congeners. We estimated the population density, sex ratio and habitat of 2 sympatric, obligate gorgonian-associated pygmy seahorses, Hippocampus bargibanti and H. denise, in a 20 km long coastal marine protected area in southeast Sulawesi, Indonesia. Belt transects covering 200 m2 each were surveyed at 7 sites and 5 depth contours to record the density of seahorses and their host gorgonians. The population density (±SE) was 1.17 (±0.27) per 200 m2 for H. denise and 0.34 (±0.20) per 200 m2 for H. bargibanti, some of the lowest densities for unexploited seahorse populations studied thus far. Male−female pairs (43.9%) were the most common group composition for H. denise, with single, 3 or 4 individuals found on 19.5, 7.3 and 29.3% of inhabited gorgonians, respectively. H. denise inhabited 7.8% of Annella reticulata gorgonians within the survey area but were recorded from a total of 8 gorgonian genera during extensive opportunistic ad hoc searches. Annella spp. density was 10.7 times higher than that of Muricella spp. (the sole host of H. bargibanti), of which 20.0% were inhabited. The small population size, occurrence of pygmy seahorses in groups on their hosts with the resulting skew in sex ratios, and habitat specialisation likely all impact the species’ population dynamics, and hence these need to be considered in conservation management strategies. KEY WORDS: Habitat specialist · Miniature species · Abundance · Rare species · Hippocampus · Syngnathidae · Pygmy seahorse · Gorgonian Full text in pdf format PreviousNextCite this article as: Smith RE, Grutter AS, Tibbetts IR (2012) Extreme habitat specialisation and population structure of two gorgonian-associated pygmy seahorses. Mar Ecol Prog Ser 444:195-206. https://doi.org/10.3354/meps09471 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 444. Online publication date: January 10, 2012 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2012 Inter-Research." @default.
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- W2083136306 title "Extreme habitat specialisation and population structure of two gorgonian-associated pygmy seahorses" @default.
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