Reproductive dynamics of a swimming crab (Monomia haanii) in the world’s crab basket

Lin, Bai-an; Boenish, Robert; Kritzer, Jacob P.; Jiang, Yan; Wang, Songlin; Liu, Min

doi:10.1016/j.fishres.2020.105828

Cited by 5 publications

(20 citation statements)

References 16 publications

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“…Based on abdomen morphology, sexes were determined, and berried females were considered fully mature (Figures 2B,C). Consistent with literature on other similar crabs, embryonic developmental stages from early to late were noted by the yellow, orange-red and brown coloration, respectively (Arshad et al, 2006;Hisam et al, 2018;Lin et al, 2021).…”

Section: Crab Measurement and Examinationsupporting

confidence: 84%

“…In C. philargius, a strong femalebias occurred in the peak spawning month (February), suggesting that C. philargius females may also migrate from deeper waters to spawn nearshore. A recent study on M. haanii from the same fishing grounds showed a similar pattern, i.e., a strong female-bias in peak spawning months (February and March) (Lin et al, 2021).…”

Section: Discussion Population Structuresupporting

confidence: 53%

“…The pattern of sexual size dimorphism, however, is largely species specific. For example, Callinectes danae, C. sapidus, C. philargius, Chaceon macphersoni, Chaceon affinis, Chionoecetes tanneri, Cancer borealis Johngarthia lagostoma, M. haanii, Platyxanthus crenulatus, and Ranina ranina (Krajangdara and Watanabe, 2005;Hartnoll et al, 2009;Sforza et al, 2010;Keller et al, 2012;Groeneveld et al, 2013;Farias et al, 2014;Biscoito et al, 2015;Jivoff et al, 2017;Truesdale, 2018;Lin et al, 2021; this study) are No samples in May-July 2019. Data (average and range) from the number of trap vessels surveyed monthly.…”

Section: Discussion Population Structurementioning

confidence: 57%

“…Commercial bottom trawl and trap vessels from Dongshan County (Fujian Province, China) operate exclusively in the fishing grounds of the southern Taiwan • N, 116.00-119.00 • E) (see Figure 2 in Lin et al, 2021). Monthly sampling of whole body crabs was conducted during January-April 2019 and August-December 2019 at the landing ports of Dongshan County.…”

Section: Calappa Philargius Collectionmentioning

confidence: 99%

“…Female fecundity, defined as the number of eggs carried by a female, was estimated empirically following standard methodologies (Lin et al, 2021). The absolute fecundity (Fa) was calculated as: Fa = W * m/n, where W is the total weight of the whole egg mass for a female, m is the average weight of the five egg sub-samples (approximate 0.02 g per sub-sample), and n is the average number of eggs from the five sub-samples (Johnson et al, 2010;Soundarapandian et al, 2013).…”

Section: Crab Measurement and Examinationmentioning

confidence: 99%

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Population, Reproductive and Fishery Dynamics of Spotted Box Crab (Calappa philargius), a New Claw-Only Fishery Species, in the Southern Taiwan Strait, China

et al. 2021

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The spotted box crab Calappa philargius (Calappidae) is an increasingly consumed species in China, mainly sourced from a claw-only fishery. Being a not well-characterized species in the literature, this study is warranted to inform sustainable management approaches. Here we report on the first in-depth overview on biology and fishery dynamics of C. philargius in the southern Taiwan Strait of China. Whole body crabs (N = 1,009) were collected monthly from January to December 2019 from trawlers, operating in the southern Taiwan Strait; sample collection was absent from May to July because of the national fishing moratorium regulation. Sex ratio, growth pattern, size at maturity and fecundity were estimated. The overall male: female ratio was 1: 1.47, significantly differing from the 1: 1 (p < 0.01); monthly sex ratio variations were also significant (p < 0.01), suggesting possible seasonal sexual segregation. We found the carapace widths (CW) of males were significantly larger than those of females (p < 0.01). Based on the occurrence and percentages of berried females, we identified twin spawning events in January–April and August–October with the overall peak occurring in February. Size at 50% female maturity was 11.47 cm CW. Female absolute fecundity was significantly related to CW via a power function relationship (N = 14, p < 0.01). The estimated average claw yield was 36.28 ± 3.07% of the whole body weight (N = 95), irrespective of sex and size (p > 0.5). Capture and trade data of C. philargius using trawl and trap fishing gears were documented to characterize claw-only fishery dynamics for future research and sustainable use.

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Section: Crab Measurement and Examinationsupporting

confidence: 84%

Section: Discussion Population Structuresupporting

confidence: 53%