Epibiotic barnacles of sea turtles as indicators of habitat use and fishery interactions: An analysis of juvenile loggerhead sea turtles, Caretta caretta, in the western Mediterranean
“…(2019) where they detected two different age classes of C. testudinaria in their studies. Age estimation of barnacles as a function of their size has been examined in past studies (Ewers-Saucedo et al ., 2015; Doell et al ., 2017; Ten et al ., 2019). Ewers-Saucedo et al .…”
Section: Resultsmentioning
confidence: 95%
“…Ten et al . (2019) suggested that the distribution of C. testudinaria in neritic waters could result from synergistic effects of its flexibility in host selection and its short planktonic phase (about 9 days). Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The shortest interval for barnacle reacquisition was ~175 days (one sampling trip) whereas the longest was ~730 days (four sampling trips). The geographic localities where sea turtles are colonized by barnacles can give an understanding of the movements and habitat use by sea turtles (Ten et al ., 2019) and conversely, where and when barnacles accumulate on sea turtles can provide insight in barnacle life history. There were no large turtles (i.e.…”
Section: Resultsmentioning
confidence: 99%
“…(2015) andTen et al (2019) where they detected two different age classes of C. testudinaria in their studies. Age estimation of barnacles as a function of their size has been examined in past studies(Ewers-Saucedo et al, 2015;Doell et al, 2017;Ten et al, 2019) Ewers-Saucedo et al (2015). suggested that the size frequency distribution of each age class in a natural population should be normally distributed and multimodal if several age classes are present.…”
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.
“…(2019) where they detected two different age classes of C. testudinaria in their studies. Age estimation of barnacles as a function of their size has been examined in past studies (Ewers-Saucedo et al ., 2015; Doell et al ., 2017; Ten et al ., 2019). Ewers-Saucedo et al .…”
Section: Resultsmentioning
confidence: 95%
“…Ten et al . (2019) suggested that the distribution of C. testudinaria in neritic waters could result from synergistic effects of its flexibility in host selection and its short planktonic phase (about 9 days). Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The shortest interval for barnacle reacquisition was ~175 days (one sampling trip) whereas the longest was ~730 days (four sampling trips). The geographic localities where sea turtles are colonized by barnacles can give an understanding of the movements and habitat use by sea turtles (Ten et al ., 2019) and conversely, where and when barnacles accumulate on sea turtles can provide insight in barnacle life history. There were no large turtles (i.e.…”
Section: Resultsmentioning
confidence: 99%
“…(2015) andTen et al (2019) where they detected two different age classes of C. testudinaria in their studies. Age estimation of barnacles as a function of their size has been examined in past studies(Ewers-Saucedo et al, 2015;Doell et al, 2017;Ten et al, 2019) Ewers-Saucedo et al (2015). suggested that the size frequency distribution of each age class in a natural population should be normally distributed and multimodal if several age classes are present.…”
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.
“…En el Golfo de México, se ha registrado la presencia de metacercarias como Clinostomum complanatum (Rudolphi, 1814) que se ha encontrado principalmente en peces P. pardalis en el suroeste de México (Rodríguez-Santiago et al, 2016) este pescado se utiliza en la elaboración de ceviche, platillo gastronómico de comida típica en las costas. Los miembros de esta especie de parásito se han encontrado unidos a la laringe y faringe humana después de comer mariscos crudos desde su primer registro (Chung et al, 1995) hasta la actualidad (Hara et al, 2014;Lee et al, 2017;Hyun et al, 2018 (Ten et al, 2019). De acuerdo con esta autora, las ballenas y tortugas marinas, son un verdadero ecosistema errante, debido a los organismos epibiontes que viven sobre ellos.…”
El objetivo de este estudio fue determinar la presencia de parásitos metazoarios y epibiontes en el ostión del placer <em>Crassostrea corteziensis</em> (Hertlein, 1951) en dos localidades costeras y pesqueras del estado de Sinaloa, en el noroeste del Pacífico mexicano. Se colectaron 30 ostiones en la cooperativa pesquera de “Playa norte” en la bahía de Mazatlán, Sinaloa y se realizó una comparación con la presencia de parásitos en ostiones en la laguna costera de “Ceuta”. La inspección de ostiones en la laguna costera reveló la presencia de 36 metacercarias encapsuladas de la familia Acanthocolpidae en la gónada del ostión <em>C. corteziensis</em>. En la bahía de Mazatlán, en la zona de Playa norte, se encontraron seis metacercarias: tres de la sp. 1 (pertenece a la familia Hemiuridae) en el manto, un espécimen de sp.2 (Familia Fellodistomidae) en la glándula digestiva y una metacercaria sp3. no identificada en el manto, una metacercaria de (Familia Zoogonidae) en la glándula digestiva, dos nemátodos de vida libre del género <em>Theristus </em>sp. Como organismos epibiontes se encontraron siete ejemplares de poliquetos de la familia Nereididae en la concha de los ostiones. Este trabajo reporta por primera vez la invasión del digeneo <em>Stephanostomum</em> sp. Looss, 1899 de la familia Acanthocolpidae parásito de la gónada del ostión <em>C. corteziensis</em> en el Pacífico mexicano. Así como, la presencia de digeneos pertenecientes a la familia Fellodistomidae, Hemiuridae y Zoogonidae. Los resultados de este trabajo contribuyen al conocimiento en la biología, la biodiversidad y la preferencia del hospedero de estos parásitos, con posibles implicaciones en los riesgos para la salud que plantea el consumo humano del ostión del placer, con gran regionalización en el consumo de mariscos crudos que presentan amplia identidad social gastronómica en estas zonas costeras en el Pacífico mexicano.
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