Abundance and body size of the moonsnail &lt;i&gt;Laguncula pulchella&lt;/i&gt; in the Misuji River estuary, Seto Inland Sea, Japan: comparison with a population in northern Japan

Yoshida, Kazunobu; Sato, Tatsuma; Narita, Kaoru; Tomiyama, Takeshi

doi:10.3800/pbr.12.53

Cited by 3 publications

(2 citation statements)

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“…Despite it being mentioned (Huelsken et al ., 2008) that naticid egg masses are ‘generally very abundant’, there is virtually no quantitative information about the density and distribution of egg collars of naticid species around the world. The density of egg collars of Laguncula pulchella , a species invasive to Japanese coasts in the sandflats of the Hiroshima Bay was on average 0.35 units m −2 , while at 870 km to the north-east at Matsukawaura Lagoon it was much higher, comprising 1.74 units m −2 (Yoshida et al ., 2017). It is difficult to compare these data with our results because of different counting methods (quadrat or transect sampling, total counting).…”

Section: Discussionmentioning

confidence: 99%

“…Because conspicuous and easy to collect, sand collars of moonsnails were studied for morphology (Giglioli, 1955; Ziegelmeier, 1961; Murray, 1969; Pastorino et al ., 2009; Kang et al ., 2018), development of embryos and larvae (Ansell, 1981; Kingsley-Smith et al ., 2003; Kulikova et al ., 2007; Pastorino et al ., 2009), timing of spawning and duration of development (Ansell, 1981; Kingsley-Smith et al ., 2003; Tomiyama, 2013). Works assessing density of naticid egg collars are extremely rare (Yoshida et al ., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Moonsnail hatching success, development timing and early feeding behaviour at the high-latitude White Sea

2020

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As predators, Naticidae (Gastropoda) can shape marine soft-sediment communities. Thus understanding of the reproductive biology and development of moonsnails is of great importance. Most moonsnails lay large egg masses, known as sand or egg collars, which are freely distributed on sand or muddy sediments. Here we report upon the abundance of egg collars of two naticid species, Amauropsis islandica and Euspira pallida, from the high-latitude White Sea, as well as describe the morphology of egg collars and hatching success, with a brief description of juvenile feeding in A. islandica. While in the subtidal zone, the egg collars of E. pallida were 10 times more abundant than of A. islandica, the egg collars of the latter species were the only ones that occur in the intertidal zone. The morphology of an egg collar of E. pallida differed from the literature descriptions by having a plicated basal margin. The number of egg capsules inside the collars was twice as high in A. islandica compared with E. pallida, but they were smaller. Amauropsis islandica hatchlings were larger and hatching success was more than twice that in E. pallida. We suggest that these characteristics promote the high abundance of A. islandica populations observed on some tidal flats of the White Sea. Surprisingly, A. islandica juveniles could perform non-drilling feeding in the first month after hatching. This study fills the gap in the knowledge of naticid reproductive biology at high latitudes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Moonsnail hatching success, development timing and early feeding behaviour at the high-latitude White Sea

2020

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Male-biased sex ratio in the crawling individuals of an invasive naticid snail during summer: implications for population management

Yoshida

Setogawa

Sato³

et al. 2022

Sci Rep

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The naticid snail Laguncula pulchella is an invasive species that preys on clams in tidal flats and has serious impacts on clam fisheries in Japan. Laguncula pulchella burrow in sand, but often crawl on sediment surfaces during low tide. We investigated seasonal changes in the abundance and sex ratio of crawling L. pulchella during the daytime at Matsukawaura Lagoon, Japan, from March to October from 2015 to 2019. The density of crawling individuals peaked in July. The sex ratio of crawling individuals varied with months and years but was significantly biased towards males during the main copulation period (July–August); males accounted for 77–98% of the mature crawling individuals (≥ 25 mm shell height). The somatic condition of mature males declined from June to August, whereas that of females was constant during this period. These results indicate that mature males actively come to the sand surface during low tide to search for females for copulation from July to August. Fishermen make efforts to remove crawling individuals in summer, but the male-biased sex ratio must also be considered for effective population control of this species.

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Starvation Tolerance of Early Stage Laguncula pulchella (Naticidae)

Kinoshita

Tomiyama

2022

Journal of Shellfish Research

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The starvation tolerance of the moonsnail Laguncula pulchella was examined under nonfeeding conditions in the laboratory using individuals at the early stages of development, which comprised subadults (≤19 mm shell width) and newly hatched juveniles (≤1.7 mm). The newly hatched juveniles survived for ≤86 days at 20°C, ≤56 days at 25°C, and ≤22 days at 30°C, whereas subadults survived for ≤323 days at 20°C and ≤181 days at 30°C. These starvation tolerance ranges were relatively greater than those of other gastropods. There was a positive correlation between shell size and the duration of juvenile survival, indicating that the juveniles hatched at larger sizes have more energy stores. The high starvation tolerance of L. pulchella might be contributing to its invasion success in habitats with low prey availability.

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Abundance and body size of the moonsnail <i>Laguncula pulchella</i> in the Misuji River estuary, Seto Inland Sea, Japan: comparison with a population in northern Japan

Cited by 3 publications

References 13 publications

Moonsnail hatching success, development timing and early feeding behaviour at the high-latitude White Sea

Moonsnail hatching success, development timing and early feeding behaviour at the high-latitude White Sea

Male-biased sex ratio in the crawling individuals of an invasive naticid snail during summer: implications for population management

Starvation Tolerance of Early Stage Laguncula pulchella (Naticidae)

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