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Reproductive traits of the symbiotic pea crab Austinotheresangelicus (Crustacea Pinnotheridae) living in Saccostreapalmula (Bivalvia Ostreidae) Pacific coast of Costa Rica

机译:共生豌豆蟹Austinotheres的生殖特性住在Saccostrea的angelicus(甲壳纲Pinnotheridae)哥斯达黎加的太平洋海岸palmula(双壳纲Ostreidae)

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摘要

Pea crabs of the family Pinnotheridae exhibit a symbiotic life style and live associated with a variety of different marine organisms, especially bivalves. Despite the fact that pea crabs can cause serious problems in bivalve aquaculture, the available information about the ecology of these crabs from Central America is extremely limited. Therefore, the present study aimed to describe different reproductive features of the pinnotherid crab Austinotheres angelicus associated with the oyster Saccostrea palmula in the Golfo de Nicoya, Pacific coast of Costa Rica. Monthly sampling was conducted from April to December 2012. Average carapace width (CW) of the 47 analyzed ovigerous females was 7.62 mm. The species produced on average 2677 ± 1754 recently -extruded embryos with an average volume of 0.020 ± 0.003 mm3; embryo volume increased during embryogenesis by 21%, but did not vary significantly between developmental stages. Brood mass volume varied greatly (between 11.7 and 236.7 mm3), and increased significantly with female CW. Females invested on average 76.7% (minimum: 21.7%; maximum: 162.8%) of their body weight in brood production, which confirms a substantially higher energy allocation for embryo production in pinnotherid crabs compared to free-living decapods.
机译:Pinnotheridae家族的豌豆蟹具有共生的生活方式,其生活与多种不同的海洋生物(尤其是双壳类动物)相关。尽管豌豆蟹会在双壳类水产养殖中造成严重问题,但中美洲有关这些蟹的生态学的可用信息极为有限。因此,本研究旨在描述哥斯达黎加太平洋海岸尼古亚的牡蛎Saccostrea palmula的pinnotherid蟹Austinotheres angelicus的不同繁殖特征。从2012年4月至2012年12月进行每月抽样。分析的47名有卵雌性雌性的平均甲壳宽度(CW)为7.62毫米。该物种最近平均挤压出2677±1754个胚,平均体积为0.020±0.003 mm 3 。胚体积在胚胎发生过程中增加了21%,但在发育阶段之间没有显着变化。雌性CW的产卵量变化很大(在11.7和236.7 mm 3 之间),并且明显增加。雌性平均将其体重的76.7%(最小:21.7%;最大:162.8%)用于生产亲鱼,这证实了与自由活动的十足动物相比,Pinnotherid蟹在胚胎生产中的能量分配要高得多。

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