Occurrence, Abundance, and Length Frequency Distribution of Queen Conch, Strombus gigas (Gastropoda) in Shallow Waters of the Jaragua National Park, Dominican Republic.
Occurrence, Abundance, and Length Frequency Distribution of Queen Conch, Strombus gigas (Gastropoda) in Shallow Waters of the Jaragua National Park, Dominican Republic.
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多米尼加共和国雅拉瓜国家公园浅水区女王海螺、Strombus gigas（腹足纲）的出现、丰度和长度频率分布。
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
J. U. M. P. Osada
中科院分区：
文献类型：
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作者：
J. U. M. P. Osada
摘要：幼年海螺的分布与海草床内某些独特的生态特征有关，例如强烈的潮汐环流模式、2 至 4 m 的深度以及中等生物量的海草床。了解苗圃的位置对于保证其对渔业管理或种群增殖计划的保护非常重要。雅拉瓜国家公园位于多米尼加共和国西南部，为重要的龙虾、海螺和鱼类手工渔业提供支持。为了提供雅拉瓜国家公园浅水区幼年海螺分布的准确信息，1997年3月和6月至7月期间访问了34个站点（站）。收集了海螺丰度、长度、年龄、栖息地类型和深度（最大20 m）的数据。为了估计海螺密度和丰度，该地区分为五个区域（Canal de Beata、Bucan de Tui、El Cuevon、Bahia de Las Aguilas、Cabo Rojo）。发现的大多数海螺是幼海螺（88.9%）。 Canal de Beata 的幼海螺密度最高（114.2 个海螺/公顷），丰度最高（658,707 个海螺），Bucan de Tui 的密度最低（4.0 个海螺/公顷），Cabo Rojo 的丰度最低（14,343 个海螺）。幼海螺密度和丰度的总体估计分别为 53.0 只/公顷和 1,076,169 只海螺。幼鱼身长5至26厘米（平均14厘米）。混合海草床上幼鱼密度最高（73.9 个海螺/公顷），且深度低于 7 m（73.7 个海螺/公顷）。这些深度的成虫密度为 4.6 个海螺/公顷。贝阿塔运河是一个合适的苗圃，应该受到保护。
A BSTRACT .—The distribution of juvenile queen conch has been associated with certain ecologically unique characteristics within seagrass beds, such as strong tidal circulation patterns, depth of 2 to 4 m, and seagrass beds with intermediate biomass. Knowledge of the location of nursery grounds is important to guarantee their protection for fisheries management or stock enhancement programs. Jaragua National Park is located in the Southwest portion of the Dominican Republic and supports an important artisanal fishery for lobsters, queen conch, and fishes. To provide precise information on juvenile queen conch distribution in the shallow waters of the Jaragua National Park, 34 sites (stations) were visited during the months of March and June-July, 1997. Data were collected on conch abundance, length, age, habitat type and depth (to a maximum of 20 m). For conch density and abundance estimations, the area was divided into five regions (Canal de Beata, Bucan de Tui, El Cuevon, Bahia de Las Aguilas, Cabo Rojo). Most of the conch found were juveniles (88.9%). Canal de Beata had the highest density of juveniles (114.2 conchs/ha) and abundance (658,707 conchs), while Bucan de Tui had the lowest density (4.0 conchs/ha) and Cabo Rojo had the lowest abundance (14,343 conchs). The overall estimates of juvenile density and abundance was 53.0 conchs/ha and 1,076,169 conchs, respectively. Juveniles ranged from 5 to 26 cm in length (mean: 14 cm). Juvenile density was highest on mixed seagrass beds (73.9 conchs/ha) and below 7 m depth (73.7 conchs/ha). Adult density at these depths was 4.6 conchs/ha. Canal de Beata is a suitable nursery ground and should be protected.