Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, Av. IPN s/n, Col. Playa Palo de Santa Rita, La Paz, Baja California Sur 23096, Mexico.
J Fish Biol. 2009 Aug;75(3):630-46. doi: 10.1111/j.1095-8649.2009.02327.x.
The interannual distribution of early life stages of Pacific hake Merluccius productus, within the southern part of the California Current (32-23 degrees N) from 1951 to 2001, was examined to describe the relationship between spawning habitat and environmental conditions. Mean annual abundance was affected by different factors along the west coast of the Baja California Peninsula. In the northern areas (Ensenada and Punta Baja), reduced abundance of larvae coincided with the El Niño and a North Pacific Ocean climatic regime shift, but in the southern areas (San Ignacio to Bahía Magdalena), the drastic reductions suggested a fishery effect for large adults of the coastal migratory population, starting in 1966. Two spawning stocks, coastal and dwarf, were evident in comparisons of latitudinal differences in occurrence of early stages and differences in temperature preferences that seemed to break at Punta Eugenia.
1951 年至 2001 年期间，对加利福尼亚海流南部（北纬 32-23 度）太平洋无须鳕 Merluccius productus 早期生活阶段的年际分布进行了研究，以描述产卵栖息地与环境条件之间的关系。平均年丰度受巴哈加利福尼亚半岛西海岸不同因素的影响。在北部地区（恩塞纳达和蓬塔巴哈），幼虫丰度减少与厄尔尼诺现象和北太平洋气候制度转变有关，但在南部地区（圣伊格纳西奥到马格达莱纳湾），大量成年沿海洄游种群的急剧减少表明从 1966 年开始渔业产生了影响。在比较早期阶段出现的纬度差异和似乎在欧亨尼娅角（Punta Eugenia）处出现的温度偏好差异时，出现了沿海和矮型两种产卵群体。
