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RISS 인기검색어
- 검색키워드
- 저자 : Floyd E. Hayes (검색결과 4 건)
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Floyd E. Hayes,Madeline E. Eastman,John C. Duncan 국립중앙과학관 2023 Journal of Asia-Pacific Biodiversity Vol.16 No.3
Many fish species are known to associate with echinoids. We studied the frequency of fishes associatingwith the diadematid Black Longspine Urchin Diadema setosum and Banded Sea Urchin Echinothrix cal amaris in the Phi Phi Islands of southwestern Thailand during July 17e20, 2022. A total of 1373 fishindividuals of 20 species associated with 1157 D. setosum, and 11 fish individuals of seven speciesassociated with 76 E. calamaris. The proportion of fish individuals per echinoid host was 8.2 times higherfor longer-spined D. setosum (1.19) than for E. calamaris (0.14), and the proportion of echinoids hostingone or more fish was 2.5 times higher for D. setosum (22.9%) than for E. calamaris (9.2%), supporting thehypothesis that fishes prefer to associate with echinoid species with the longest spines, which potentiallyprovide more protection against predators. All fishes associating with echinoids were small (<10 cm);most were adults, but for some species, all were juveniles. All fishes were facultative associates ofechinoids. Only three fish species had been previously reported associating with D. setosum and nonewith E. calamaris; the remaining fish species represent new records of association, including 17 forD. setosum and seven for E. calamaris.
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Floyd E. Hayes,John Engbring 국립중앙과학관 2020 Journal of Asia-Pacific Biodiversity Vol.13 No.2
Seven species of flying foxes of the genus Pteropus have been described from the Caroline Islands andMariana Islands of Micronesia. Among the five extant species, P. ualanus of Kosrae is the least studied.Wereview the history of research on P. ualanus and summarize data from recent surveys. Early historicalaccounts suggest that P. ualanus was abundant until a severe population bottleneck, attributed to aninfectious disease, allegedly reduced the population to two individuals during 1926e1927. During 1982and 1983, we found three colonies and a minimum of 600e700 bats in the mountains. Subsequently twonew colonies became established in coastal localities by 1994 and 2002 and currently represent thelargest colonies. During 2013 and 2014, Hayes visited four confirmed and two possible colonies (three inthe mountains, three along the coast) ranging in size from two to 1038 individuals and counted aminimum of 1765 individuals. Long-term changes occurred in the size of colonies. Because not all individualswere counted and at least one other colony likely exists, the population probably exceeds 2000and may exceed 3000 individuals. The population may not have reached its carrying capacity and maystill be increasing. Potential existential threats include infectious disease, typhoons, overhunting, andhabitat loss.
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Ectosymbionts of the Sea Anemone Stichodactyla gigantea at Kosrae, Micronesia
Floyd E. Hayes,Brandon J. Painter 한국동물분류학회 2016 Animal Systematics, Evolution and Diversity Vol.32 No.2
We studied the ectosymbionts associating with the sea anemone Stichodactyla gigantea at Kosrae, Micronesia. Ectosymbionts of seven species associated with 60.7% of S. gigantea (n=28), with a mean of 2.4 per anemone and 3.9 per occupied anemone. Anemones hosting one or more ectosymbionts did not differ significantly in size from anemones lacking ectosymbionts and there was no significant correlation between anemone size and the number of ectosymbionts. Of 67 ectosymbionts observed, the sea cucumber Stichopus vastus comprised 23.9%, followed by the shrimp Thor amboinensis (20.9%), unidentified hermit crabs (Paguroidea; 20.9%), the cardinalfish Ostorhinchus novemfasciatus (20.9%), the shrimp Periclimenes brevicarpalis (9.0%), the sea cucumber Holothuria hilla (3.0%), and an unidentified brachyuran crab (1.5%). This study documents the first records of S. vastus, H. hilla, and O. novemfasciatus associating with S. gigantea, and the first locality records of S. gigantea, T. amboinensis, P. brevicarpalis, and S. vastus for Kosrae. Because humans often harvest S. gigantea for food at Kosrae, we recommend protecting the symbiotic assemblage of S. gigantea by establishing a sustainable system of harvesting.
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Ectosymbionts of the Sea Anemone Stichodactyla gigantea at Kosrae, Micronesia
Hayes, Floyd E.,Painter, Brandon J. The Korean Society of Systematic Zoology 2016 Animal Systematics, Evolution and Diversity Vol.32 No.2
We studied the ectosymbionts associating with the sea anemone Stichodactyla gigantea at Kosrae, Micronesia. Ectosymbionts of seven species associated with 60.7% of S. gigantea (n=28), with a mean of 2.4 per anemone and 3.9 per occupied anemone. Anemones hosting one or more ectosymbionts did not differ significantly in size from anemones lacking ectosymbionts and there was no significant correlation between anemone size and the number of ectosymbionts. Of 67 ectosymbionts observed, the sea cucumber Stichopus vastus comprised 23.9%, followed by the shrimp Thor amboinensis (20.9%), unidentified hermit crabs (Paguroidea; 20.9%), the cardinalfish Ostorhinchus novemfasciatus (20.9%), the shrimp Periclimenes brevicarpalis (9.0%), the sea cucumber Holothuria hilla (3.0%), and an unidentified brachyuran crab (1.5%). This study documents the first records of S. vastus, H. hilla, and O. novemfasciatus associating with S. gigantea, and the first locality records of S. gigantea, T. amboinensis, P. brevicarpalis, and S. vastus for Kosrae. Because humans often harvest S. gigantea for food at Kosrae, we recommend protecting the symbiotic assemblage of S. gigantea by establishing a sustainable system of harvesting.
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