Shukalyuk Andrey I, Isaeva Valeria V, Pushchin Igor I, Dolganov Sergey M
Laboratory of Embryology, Institute of Marine Biology, Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia.
J Parasitol. 2005 Dec;91(6):1502-4. doi: 10.1645/GE-489R1.1.
Commercial crab populations off the Kamchatka coasts are infested to a considerable degree by the rhizocephalan parasite Briarosaccus callosus: of 769 Lithodes aequispina males examined, 43 (5.7%) were parasitized. Infestations result in the feminization of the crabs, a significant decrease in the cheliped length, and a significant decrease in the carapace length and width. We suggest that commercial selection of healthy males, and the returning of unsuitable crabs, including infested ones, back into the sea, results in an increase of the proportion of infested crabs in the population, their elimination from reproduction, and, eventually, the gradual degradation of a whole population. To minimize as far as possible the negative effects of commercial crab harvesting, all infested crab specimens caught must be destroyed, either aboard or elsewhere, instead of throwing them back into the sea.
堪察加半岛沿岸的商业蟹种群受到根头目寄生虫“Briarosaccus callosus”的严重侵害：在检查的769只平刺石蟹雄蟹中，有43只（5.7%）被寄生。感染会导致蟹类雌性化，螯足长度显著缩短，背甲长度和宽度也显著减小。我们认为，对健康雄蟹进行商业挑选，并将不合适的蟹（包括受感染的蟹）放回大海，会导致种群中受感染蟹的比例增加，它们无法参与繁殖，最终导致整个种群逐渐退化。为了尽可能减少商业捕蟹的负面影响，所有捕获的受感染蟹标本必须在船上或其他地方销毁，而不是扔回大海。
