Macroinvertebrates associated in sargassum spp
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Macroinvertebrates associated in sargassum spp

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This is our research on Invertebrates.

This is our research on Invertebrates.

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  • The second highest number of individuals are in Family Toxopneustidae of Phylum Echinodermata ( Tripnuestes gratilla )
  • as they are attached to the blade of the seaweeds.

Macroinvertebrates associated in sargassum spp Macroinvertebrates associated in sargassum spp Presentation Transcript

  • Macroinvertebrates Associated in Sargassum spp. in Maribago, Cebu Manolong, Julius Balatayo, Annelyn Gem Jayme Anna Freya
  • INTRODUCTION
    • Seagrasses and seaweeds are
    • home to a diverse group of marine
    • animals (Karleskint et al. 2006).
    • Sargassum is one of the most
    • abundant algae in the marine waters. It belongs to the genus of brown (class Phaeophyceae) macroalga (seaweed) in the order Fucales.
    • The Sargassum beds play an important ecological role in the intertidal and subtidal levels . (Castillo 2008).
  • Objectives:
    • To identify the associated macroinvertebrates living on the Sargassum spp.
    • Observe the relationships between the macroinvertebrates associated with Sargassum spp.
  • Significance of the Study
    • This study will inform people on the macroinvertebrates living on the Sargassum spp. near the USC Maribago Marine Station.
    • It will also contribute to the future studies of macroinvertebrates associated with the Sargassum beds. And its ecological relationship as this is not well-studied compared to vertebrate species.
    • Through this study, researchers also want the community to be aware of the ecological importance and indirect economic value of these Sargassum beds.
  • MATERIALS AND METHODS Ocular visit Collection of specimens Preservation with 80% ethyl alcohol Measurement and Documentation Identification of specimens
  • Figure 1. The study site (Google Earth) Study site
  • RESULTS AND DISCUSSION
    • A total of 130 specimens were collected and there were 24 species, 15 genera and 4 phyla.
    • The macroinvertebrates associated with Sargassum spp. in the eastern coast of Mactan Island, Cebu, revealed the presence of a rich variety of gastropods and echinoderms.
    • There are more juvenile organisms found than adults based on their length which showed dependence of juveniles on the Sargassum spp. possibly for the attachment, shelter, and food source.
  • Fig. 1 Abundance of different kinds of species in every Phylum
  • Phylum Mollusca Euplica brunnidentata Astraea calcar Clypeomorus batillaria Pictocolumbella ocellata
  • Phylum Echinodermata Tripneustes gratilla Salmacis sphaeroides Synapta maculata Unidentified
  • Phylum Porifera Callyspongia sp. 1 Callyspongia sp. 2 Haliclona cymaeformis Callyspongia sp. 3
  • Phylum Cnidaria Unidentified
    • Most number of Individuals:
    • 1. Astraea calcar (Fam.Turbinidae, Phylum Mollusca)
    • 2. Tripneustes gratilla (Fam.Toxopneustidae, Phylum Echinodermata )
  • Fig. 2 Different Families in Phylum Mollusca
  • Figure 3. Abundance of individuals in Family Turbinidae
  • Astraea phoebia Astraea heliotropium Astraea calcar Astraea calcar
    • Most macroinvertebrates found in the Sargassum beds are juveniles
    • --Juvenile gastropods have the most number of individuals collected.
    Euplica brunnidentata
    • Some adult echinoderms were spotted usually near the holdfast of the Sargassum spp. especially the sea urchins ( Salmacis sphaeroides and Tripnuestes gratilla)
    • The abundance of the fauna in seaweeds is also due to habitat preference and not just for the escape from predators (Bell and Destoby 2000).
    Tripneustes gratilla
  • SUMMARY
    • The Sargassum beds located near the man-made island of the Maribago Bluewaters yielded 24 species of macroinvertebrates under 4 Phyla.
    • In terms of number of individuals, the Astraea calcar (Mollusca) and Tripneustes gratilla (Echinodermata) were the most abundant.
    • The Sargassum beds are important grounds for several juveniles that are vulnerable and susceptible to predators and they may provide food to different organisms in the coastal area.
    • Sargassum bed is essential ecologically because of its possible role in maintaining the biodiversity by offering food and protection to the juveniles.
  • RECOMMENDATION
    • Extensive sampling with the use of appropriate sampling methods to allow quantitative analysis of patterns observed.
    • Experiments on why juveniles are more attracted to the upper portion of the Sargassum.
  • ACKNOWLEDGMENT
    • To the people who helped and made this study possible;
    • Ms. Annie Diola
    • Ms. Belinda Longakit
    • Mr. Dave Valles
    • Special thanks to;
    • Herman Tan
    • Jerome Gonzales
    • Jardine Villarba
    • Venus Canonigo
    • Char lynne Rentuza
    • Luke Reggie Balatayo
  • Bell, Johann D., Destoby Mark, 2000. Abundance of Macrofauna in Dense Seagrass is due to habitat preference, not predation. Oecologia Vol. 68, No. 2 (1986), pp. 205-209. < http://www.jstor.org/stable/4217821> <Accessed 2011 Sept. 23> Castillo, Alvin. 2008. Fauna Asociada a mantos de Sargassum (Ochrophyta: Fucales) en El Sauzoso, Baja California Sur, México. Centro Interdesciplinario de Ciensas Marinas.World Wide Web. <Accessed 2011 Sept. 23> Karleskint, G.J., Turner, R., Small, J.W. 2006.Introduction to Marine Biology, 2 nd ed. Thomsone Brooks/Cole, USA. REFERENCES