González-Sansón Gaspar, Aguilar-Betancourt Consuelo, Kosonoy-Aceves Daniel, Lucano-Ramírez Gabriela, Ruiz-Ramírez Salvador, Flores-Ortega Juan Ramón, Hinojosa-Larios Angel, de Asís Silva-Bátiz Francisco
Rev Biol Trop. 2014 Mar;62(1):129-44.
Coastal lagoons are considered important nursery areas for many coastal fishes. Barra de Navidad coastal lagoon (3.76km2) is important for local economy as it supports tourism development and artisanal fisheries. However, the role of this lagoon in the dynamics of coastal fish populations is scarcely known. Thus, the objectives of this research were: to characterize the water of the lagoon and related weather conditions, to develop a systematic list of the ichthyofauna, and to estimate the proportion of juveniles in the total number of individuals captured of most abundant species. Water and fish samples were collected between March 2011 and February 2012. Physical and chemical variables were measured in rainy and dry seasons. Several fishing gears were used including a cast net, beach purse seine and gillnets of four different mesh sizes. Our results showed that the lagoon is most of the time euhaline (salinity 30-40ups), although it can be mixopolyhaline (salinity 18-30ups) during short periods. Chlorophyll and nutrients concentrations suggested eutrophication in the lagoon. Mean water temperature changed seasonally from 24.9 degrees C (April, high tide) to 31.4 degrees C (October, low tide). Considering ichthyofauna species, a total of 36 448 individuals of 92 species were collected, 31 of them adding up to 95% of the total of individuals caught. Dominant species were Anchoa spp. (44.6%), Diapterus peruvianus (10.5%), Eucinostomus currani (8.1%), Cetengraulis mysticetus (7.8%), Mugil curema (5.2%) and Opisthonema libertate (4.5%). The lagoon is an important juvenile habitat for 22 of the 31 most abundant species. These included several species of commercial importance such as snappers (Lutjanus argentiventris, L. colorado and L. novemfasciatus), snook (Centropomus nigrescens) and white mullet (Mugil curema). Other four species seem to use the lagoon mainly as adults. This paper is the first contribution on the composition of estuarine ichthyofauna in Jalisco State, and it also constitutes the more complete reference on the detailed size composition of a set of dominant species in a coastal lagoon in the central Mexican Pacific.
沿海泻湖被认为是许多沿海鱼类重要的育苗区。纳维达德巴拉沿海泻湖（面积3.76平方公里）对当地经济很重要，因为它支持旅游业发展和个体渔业。然而，这个泻湖在沿海鱼类种群动态中的作用却鲜为人知。因此，本研究的目标是：描述泻湖的水质及相关天气状况，编制一份鱼类区系的系统名录，并估算在捕获的大多数优势种个体总数中幼鱼的比例。在2011年3月至2012年2月期间采集了水和鱼的样本。在雨季和旱季测量了物理和化学变量。使用了几种捕鱼工具，包括撒网、海滩围网和四种不同网目的刺网。我们的结果表明，该泻湖大部分时间是真盐性的（盐度30 - 40千分之一），不过在短时间内可能是混合多盐性的（盐度18 - 30千分之一）。叶绿素和营养物质浓度表明该泻湖存在富营养化现象。平均水温随季节变化，从24.9摄氏度（4月，涨潮时）到31.4摄氏度（10月，落潮时）。就鱼类区系物种而言，共采集到92种鱼类的36448个个体，其中31种鱼类个体总数占捕获个体总数的95%。优势种为鳀属鱼类（44.6%）、秘鲁笛鲷（10.5%）、库氏真雀鲷（8.1%）、神秘无齿鰯（7.8%）、黑背鲻（5.2%）和自由后丝鲱（4.5%）。该泻湖是31种最丰富物种中22种的重要幼鱼栖息地。这些物种包括几种具有商业重要性的鱼类，如笛鲷（银腹笛鲷、科罗拉多笛鲷和九带笛鲷）、军曹鱼（黑军曹鱼）和黑背鲻。另外四种物种似乎主要在成年期利用该泻湖。本文是关于哈利斯科州河口鱼类区系组成的首份研究成果，同时也构成了墨西哥太平洋中部沿海泻湖一组优势种详细体长组成的最完整参考资料。
