Occurrence of Epibiont Barnacles Chelonibia testudinaria on Green Turtle Chelonia mydas at Brunei Bay

Ihwan, M. Z.; Joseph, Juanita; Jamaan, A.S.; Wahab, Wahidah; Marina, H.

doi:10.3923/ijzr.2018.43.48

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Our results indicate that the number of barnacles attached to green turtles increases with turtle size, and this finding is consistent with Hayashi & Tsuji (2008) and Devin & Sadeghi (2010). The attachment area selected is due to the free space availability (Minchinton & Scheibling, 1993; Ihwan et al ., 2018), thus resulting in a higher abundance of barnacles in larger sea turtles.…”

Section: Resultsmentioning

confidence: 99%

Abundance, placement and sexual identity of the epizoic barnacle Chelonibia testudinaria relative to the size and species of host turtles in Mabul Island, Malaysia

2020

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Sea turtles are partners in commensal relationships with a variety of epibionts, including barnacles. The acorn barnacle Chelonibia testudinaria is one species commonly found associated with sea turtles and other marine fauna throughout temperate to tropical waters including the Indo-Pacific. We conducted a study to assess the occurrence of this barnacle, relative to host life stage and species in a mixed foraging population of green (Chelonia mydas) and hawksbill (Eretmochelys imbricata) turtles (juvenile, sub-adult, adults (female and male)) in Mabul Island, Sabah, Malaysia (Celebes Sea). Expecting similar relative abundance by life stage, we found instead a significant effect between the combined dependent variables (abundance and size of barnacles) and the life stages of sea turtles in Mabul after controlling for the covariates of size and species of sea turtles (F(8, 428) = 5.77, P < 0.001, Pillai = 0.19). Among green turtles with barnacles, though adult males had larger barnacles compared with the female turtles, the mean barnacle abundance on adult females (43.4 individuals ± 5.19 SD) was higher than all other life stages. Most of the barnacles (85.6%; N = 1931) were found on the plastron of the sea turtles. The highest number of barnacle reacquisition was found among the juvenile turtles. In assessing the complemental males of the barnacles, we found they were consistently attached to the shells of the larger of the hermaphrodites from each region of the host's body despite average shell-size differences with each region.

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Section: Resultsmentioning

confidence: 99%

Abundance, placement and sexual identity of the epizoic barnacle Chelonibia testudinaria relative to the size and species of host turtles in Mabul Island, Malaysia

2020

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“…Furthermore, this study investigates seasonal and temporal changes in size and genetic compositions relative to previous studies [21,22]. While Ihwan et al [29] previously reported the presence of the barnacle Chelonibia testudinaria on green turtles in Brunei Bay, no information on the body condition and health status of the turtles has been reported. In this study, we report the hematology parameters of the Brunei Bay green turtle aggregation.…”

Section: Introductionmentioning

confidence: 94%

Health status and genetic compositions of green turtles (Chelonia mydas) foraging in Brunei Bay

Joseph,

Nishizawa,

Jalimin

et al. 2023

PLoS ONE

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Long-term monitoring of sea turtle aggregations is critical for understanding the impacts of environmental changes on their population health and habitat suitability. Brunei Bay is a significant foraging ground for green turtles in the South China Sea. We analyzed the body size, hematology and body condition of green turtles for their health status in their foraging ground in Brunei Bay over a period of nine years (2011–2019). Additionally, we used mitochondrial DNA (mtDNA) to evaluate changes in the size and genetic composition of green turtle aggregations. Our findings revealed that the size composition of the green turtle population varied seasonally, but there were no significant temporal changes in genetic and size compositions. Hematology parameters and Fulton’s body condition index were consistent with those reported for apparently healthy green turtles. Furthermore, we found that blood reference intervals indicated the turtles were healthy. These results provide valuable baseline data for future comparisons with other foraging aggregations and for long-term monitoring of green turtles in Brunei Bay.

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Echolocation Clicks of Irrawaddy Dolphins (Orcaella brevirostris) During Foraging in the Bay of Brunei, Malaysia

Muhamad

Zhang

et al. 2020

Acoust Aust

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Occurrence of Epibiont Barnacles Chelonibia testudinaria on Green Turtle Chelonia mydas at Brunei Bay

Cited by 3 publications

References 11 publications

Abundance, placement and sexual identity of the epizoic barnacle Chelonibia testudinaria relative to the size and species of host turtles in Mabul Island, Malaysia

Abundance, placement and sexual identity of the epizoic barnacle Chelonibia testudinaria relative to the size and species of host turtles in Mabul Island, Malaysia

Health status and genetic compositions of green turtles (Chelonia mydas) foraging in Brunei Bay

Echolocation Clicks of Irrawaddy Dolphins (Orcaella brevirostris) During Foraging in the Bay of Brunei, Malaysia

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