Sicydium sp., commonly known as gobies, are migratory freshwater fish that spend most of their life cycle in rivers, but when the larvae emerge they drift downstream to the sea where further development of juveniles occurs. Although Sicydium sp. are abundant in Jamaican rivers, little is known about the ecology of these species on the island and throughout the Caribbean. This study examines aspects of the ecology and biology of Sicydium populations in Jamaica. Fish sampling was carried out using dip nets and bottom kick nets at sites along the south coast in the Yallahs River, and along the north coast in the Swift River. A total of 850 gobies were captured, measured, and weighed. The values of the allometry coefficient or growth pattern (b) in the length weight relationships (LWR) were significantly different among males, females, and juveniles (p < 0.05). The growth pattern derived from LWR's was positive for females, males, and juveniles in the Yallahs River, and positive for females and juveniles but negative for males in the Swift River. The mean Fulton's condition factor (K) indicates that fish populations in both rivers are healthy and in good condition. These results augment the body of knowledge on Sicydium gobies in Jamaica.

中文翻译：

---

Scydium sp的长度重量关系和条件因素。(Gobiidae) 来自牙买加的雅拉斯河和斯威夫特河

Sicydium sp.，俗称虾虎鱼，是洄游性淡水鱼，其生命周期的大部分时间都在河流中度过，但当幼体出现时，它们会向下游漂流到海中，在那里幼体会进一步发育。虽然 Sicydium sp。在牙买加河流中很丰富，但对这些物种在岛上和整个加勒比地区的生态知之甚少。本研究考察了牙买加 Sicydium 种群的生态学和生物学方面。在亚拉斯河南海岸和斯威夫特河北海岸沿线的地点使用浸网和底踢网进行鱼类取样。共捕获、测量和称重 850 只虾虎鱼。异速生长系数或生长模式 (b) 在长度重量关系 (LWR) 中的值在男性、女性、和青少年 (p < 0.05)。来自 LWR 的生长模式对 Yallahs 河中的雌性、雄性和幼鱼呈阳性，而对 Swift 河的雌性和幼鱼呈阳性但对雄性呈阴性。平均富尔顿条件因子 (K) 表明两条河流中的鱼类种群健康且状况良好。这些结果增加了牙买加 Sicydium gobies 的知识体系。